├── .gitignore ├── LICENSE ├── android ├── build.gradle └── src │ └── main │ └── AndroidManifest.xml ├── build.gradle ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── java ├── build.gradle └── src │ └── main │ └── java │ └── org │ └── signal │ └── libsignal │ └── metadata │ ├── InvalidMetadataMessageException.java │ ├── InvalidMetadataVersionException.java │ ├── ProtocolDuplicateMessageException.java │ ├── ProtocolException.java │ ├── ProtocolInvalidKeyException.java │ ├── ProtocolInvalidKeyIdException.java │ ├── ProtocolInvalidMessageException.java │ ├── ProtocolInvalidVersionException.java │ ├── ProtocolLegacyMessageException.java │ ├── ProtocolNoSessionException.java │ ├── ProtocolUntrustedIdentityException.java │ ├── SealedSessionCipher.java │ ├── SelfSendException.java │ ├── certificate │ ├── CertificateValidator.java │ ├── InvalidCertificateException.java │ ├── SenderCertificate.java │ └── ServerCertificate.java │ └── protocol │ ├── UnidentifiedSenderMessage.java │ └── UnidentifiedSenderMessageContent.java ├── protobuf └── UnidentifiedDelivery.proto ├── settings.gradle └── tests ├── build.gradle └── src └── test └── java └── org └── signal └── libsignal └── metadata ├── SealedSessionCipherTest.java ├── SessionCipherTest.java ├── TestInMemorySignalProtocolStore.java └── certificate ├── SenderCertificateTest.java └── ServerCertificateTest.java /.gitignore: -------------------------------------------------------------------------------- 1 | build 2 | /obj 3 | *.iml 4 | .gradle 5 | .idea 6 | gradle.properties 7 | local.properties 8 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /android/build.gradle: -------------------------------------------------------------------------------- 1 | buildscript { 2 | repositories { 3 | google() 4 | mavenCentral() 5 | jcenter { 6 | content { 7 | includeVersion 'org.jetbrains.trove4j', 'trove4j', '20160824' 8 | } 9 | } 10 | } 11 | 12 | dependencies { 13 | classpath 'com.android.tools.build:gradle:3.5.1' 14 | } 15 | } 16 | 17 | apply plugin: 'com.android.library' 18 | apply plugin: 'maven' 19 | apply plugin: 'signing' 20 | 21 | archivesBaseName = "signal-metadata-android" 22 | version = version_number 23 | group = group_info 24 | 25 | android { 26 | compileSdkVersion 28 27 | buildToolsVersion '28.0.3' 28 | 29 | defaultConfig { 30 | minSdkVersion 19 31 | targetSdkVersion 28 32 | } 33 | 34 | compileOptions { 35 | sourceCompatibility JavaVersion.VERSION_1_7 36 | targetCompatibility JavaVersion.VERSION_1_7 37 | } 38 | 39 | sourceSets { 40 | androidTest { 41 | java.srcDirs = ['src/androidTest/java', project(':tests').file('src/test/java')] 42 | } 43 | } 44 | } 45 | 46 | repositories { 47 | google() 48 | mavenCentral() 49 | mavenLocal() 50 | jcenter { 51 | content { 52 | includeVersion 'org.jetbrains.trove4j', 'trove4j', '20160824' 53 | } 54 | } 55 | } 56 | 57 | dependencies { 58 | compile "org.whispersystems:signal-protocol-android:${protocol_version}" 59 | compile (project(':java')) { 60 | exclude group: 'org.whispersystems', module: 'signal-protocol-java' 61 | } 62 | } 63 | 64 | def isReleaseBuild() { 65 | return version.contains("SNAPSHOT") == false 66 | } 67 | 68 | signing { 69 | required { isReleaseBuild() && gradle.taskGraph.hasTask('uploadArchives') } 70 | sign configurations.archives 71 | } 72 | 73 | uploadArchives { 74 | configuration = configurations.archives 75 | repositories.mavenDeployer { 76 | beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) } 77 | 78 | repository(url: sonatypeRepo) { 79 | authentication(userName: whisperSonatypeUsername, password: whisperSonatypePassword) 80 | } 81 | 82 | pom.project { 83 | name 'signal-metadata-android' 84 | packaging 'aar' 85 | description 'Signal Protocol Plus cryptography library for Android' 86 | url 'https://github.com/SignalApp/libsignal-metadata-java' 87 | 88 | scm { 89 | url 'scm:git@github.com:SignalApp/libsignal-metadata-java.git' 90 | connection 'scm:git@github.com:SignalApp/libsignal-metadata-java.git' 91 | developerConnection 'scm:git@github.com:SignalApp/libsignal-metadata-java.git' 92 | } 93 | 94 | licenses { 95 | license { 96 | name 'GPLv3' 97 | url 'https://www.gnu.org/licenses/gpl-3.0.txt' 98 | distribution 'repo' 99 | } 100 | } 101 | 102 | developers { 103 | developer { 104 | name 'Moxie Marlinspike' 105 | } 106 | } 107 | } 108 | } 109 | } 110 | 111 | task installArchives(type: Upload) { 112 | description "Installs the artifacts to the local Maven repository." 113 | configuration = configurations['archives'] 114 | repositories { 115 | mavenDeployer { 116 | repository url: "file://${System.properties['user.home']}/.m2/repository" 117 | } 118 | } 119 | } 120 | 121 | -------------------------------------------------------------------------------- /android/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | 4 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | subprojects { 2 | ext.version_number = "0.1.2" 3 | ext.group_info = "org.signal" 4 | ext.protocol_version = "2.8.1" 5 | 6 | if (JavaVersion.current().isJava8Compatible()) { 7 | allprojects { 8 | tasks.withType(Javadoc) { 9 | options.addStringOption('Xdoclint:none', '-quiet') 10 | } 11 | } 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/signalapp/libsignal-metadata-java/4a0e0c87ea733d5c007488671b74ace0dc5dcbef/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | # Note: Check https://gradle.org/release-checksums/ before updating wrapper or distribution 2 | distributionBase=GRADLE_USER_HOME 3 | distributionPath=wrapper/dists 4 | distributionSha256Sum=027fdd265d277bae65a0d349b6b8da02135b0b8e14ba891e26281fa877fe37a2 5 | distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip 6 | zipStoreBase=GRADLE_USER_HOME 7 | zipStorePath=wrapper/dists 8 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | # Determine the Java command to use to start the JVM. 86 | if [ -n "$JAVA_HOME" ] ; then 87 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 88 | # IBM's JDK on AIX uses strange locations for the executables 89 | JAVACMD="$JAVA_HOME/jre/sh/java" 90 | else 91 | JAVACMD="$JAVA_HOME/bin/java" 92 | fi 93 | if [ ! -x "$JAVACMD" ] ; then 94 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 95 | 96 | Please set the JAVA_HOME variable in your environment to match the 97 | location of your Java installation." 98 | fi 99 | else 100 | JAVACMD="java" 101 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 102 | 103 | Please set the JAVA_HOME variable in your environment to match the 104 | location of your Java installation." 105 | fi 106 | 107 | # Increase the maximum file descriptors if we can. 108 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 109 | MAX_FD_LIMIT=`ulimit -H -n` 110 | if [ $? -eq 0 ] ; then 111 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 112 | MAX_FD="$MAX_FD_LIMIT" 113 | fi 114 | ulimit -n $MAX_FD 115 | if [ $? -ne 0 ] ; then 116 | warn "Could not set maximum file descriptor limit: $MAX_FD" 117 | fi 118 | else 119 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 120 | fi 121 | fi 122 | 123 | # For Darwin, add options to specify how the application appears in the dock 124 | if $darwin; then 125 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 126 | fi 127 | 128 | # For Cygwin or MSYS, switch paths to Windows format before running java 129 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 130 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 131 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 132 | JAVACMD=`cygpath --unix "$JAVACMD"` 133 | 134 | # We build the pattern for arguments to be converted via cygpath 135 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 136 | SEP="" 137 | for dir in $ROOTDIRSRAW ; do 138 | ROOTDIRS="$ROOTDIRS$SEP$dir" 139 | SEP="|" 140 | done 141 | OURCYGPATTERN="(^($ROOTDIRS))" 142 | # Add a user-defined pattern to the cygpath arguments 143 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 144 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 145 | fi 146 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 147 | i=0 148 | for arg in "$@" ; do 149 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 150 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 151 | 152 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 153 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 154 | else 155 | eval `echo args$i`="\"$arg\"" 156 | fi 157 | i=$((i+1)) 158 | done 159 | case $i in 160 | (0) set -- ;; 161 | (1) set -- "$args0" ;; 162 | (2) set -- "$args0" "$args1" ;; 163 | (3) set -- "$args0" "$args1" "$args2" ;; 164 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 165 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 166 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 167 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 168 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 169 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 170 | esac 171 | fi 172 | 173 | # Escape application args 174 | save () { 175 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 176 | echo " " 177 | } 178 | APP_ARGS=$(save "$@") 179 | 180 | # Collect all arguments for the java command, following the shell quoting and substitution rules 181 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 182 | 183 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 184 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then 185 | cd "$(dirname "$0")" 186 | fi 187 | 188 | exec "$JAVACMD" "$@" 189 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 33 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 34 | 35 | @rem Find java.exe 36 | if defined JAVA_HOME goto findJavaFromJavaHome 37 | 38 | set JAVA_EXE=java.exe 39 | %JAVA_EXE% -version >NUL 2>&1 40 | if "%ERRORLEVEL%" == "0" goto init 41 | 42 | echo. 43 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 44 | echo. 45 | echo Please set the JAVA_HOME variable in your environment to match the 46 | echo location of your Java installation. 47 | 48 | goto fail 49 | 50 | :findJavaFromJavaHome 51 | set JAVA_HOME=%JAVA_HOME:"=% 52 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 53 | 54 | if exist "%JAVA_EXE%" goto init 55 | 56 | echo. 57 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 58 | echo. 59 | echo Please set the JAVA_HOME variable in your environment to match the 60 | echo location of your Java installation. 61 | 62 | goto fail 63 | 64 | :init 65 | @rem Get command-line arguments, handling Windows variants 66 | 67 | if not "%OS%" == "Windows_NT" goto win9xME_args 68 | 69 | :win9xME_args 70 | @rem Slurp the command line arguments. 71 | set CMD_LINE_ARGS= 72 | set _SKIP=2 73 | 74 | :win9xME_args_slurp 75 | if "x%~1" == "x" goto execute 76 | 77 | set CMD_LINE_ARGS=%* 78 | 79 | :execute 80 | @rem Setup the command line 81 | 82 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 83 | 84 | @rem Execute Gradle 85 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 86 | 87 | :end 88 | @rem End local scope for the variables with windows NT shell 89 | if "%ERRORLEVEL%"=="0" goto mainEnd 90 | 91 | :fail 92 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 93 | rem the _cmd.exe /c_ return code! 94 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 95 | exit /b 1 96 | 97 | :mainEnd 98 | if "%OS%"=="Windows_NT" endlocal 99 | 100 | :omega 101 | -------------------------------------------------------------------------------- /java/build.gradle: -------------------------------------------------------------------------------- 1 | buildscript { 2 | repositories { 3 | google() 4 | mavenCentral() 5 | } 6 | 7 | dependencies { 8 | classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.10' 9 | } 10 | } 11 | 12 | apply plugin: 'java' 13 | apply plugin: 'com.google.protobuf' 14 | apply plugin: 'maven' 15 | apply plugin: 'signing' 16 | 17 | sourceCompatibility = 1.7 18 | archivesBaseName = "signal-metadata-java" 19 | version = version_number 20 | group = group_info 21 | 22 | repositories { 23 | mavenCentral() 24 | mavenLocal() 25 | } 26 | 27 | sourceSets { 28 | test { 29 | java { 30 | srcDirs = ['src/test/java/', project(':tests').file('src/test/java')] 31 | } 32 | } 33 | } 34 | 35 | dependencies { 36 | compile "org.whispersystems:signal-protocol-java:${protocol_version}" 37 | compile 'com.google.protobuf:protobuf-javalite:3.10.0' 38 | 39 | testCompile ('junit:junit:3.8.2') 40 | } 41 | 42 | protobuf { 43 | protoc { 44 | artifact = 'com.google.protobuf:protoc:3.10.0' 45 | } 46 | generateProtoTasks { 47 | all().each { task -> 48 | task.builtins { 49 | java { 50 | option "lite" 51 | } 52 | } 53 | } 54 | } 55 | } 56 | 57 | sourceSets { 58 | main.proto.srcDir '../protobuf' 59 | } 60 | 61 | test { 62 | testLogging { 63 | events 'passed' 64 | showStandardStreams = true 65 | } 66 | 67 | include 'org/signal/**' 68 | } 69 | 70 | def isReleaseBuild() { 71 | return version.contains("SNAPSHOT") == false 72 | } 73 | 74 | signing { 75 | required { isReleaseBuild() && gradle.taskGraph.hasTask('uploadArchives') } 76 | sign configurations.archives 77 | } 78 | 79 | uploadArchives { 80 | configuration = configurations.archives 81 | repositories.mavenDeployer { 82 | beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) } 83 | 84 | repository(url: sonatypeRepo) { 85 | authentication(userName: whisperSonatypeUsername, password: whisperSonatypePassword) 86 | } 87 | 88 | pom.project { 89 | name 'signal-metadata-java' 90 | packaging 'jar' 91 | description 'Signal Protocol Plus cryptography library for Java' 92 | url 'https://github.com/signalapp/libsignal-metadata-java' 93 | 94 | scm { 95 | url 'scm:git@github.com:SignalApp/libsignal-metadata-java.git' 96 | connection 'scm:git@github.com:SignalApp/libsignal-metadata-java.git' 97 | developerConnection 'scm:git@github.com:SignalApp/libsignal-metadata-java.git' 98 | } 99 | 100 | licenses { 101 | license { 102 | name 'GPLv3' 103 | url 'https://www.gnu.org/licenses/gpl-3.0.txt' 104 | distribution 'repo' 105 | } 106 | } 107 | 108 | developers { 109 | developer { 110 | name 'Moxie Marlinspike' 111 | } 112 | } 113 | } 114 | } 115 | } 116 | 117 | task installArchives(type: Upload) { 118 | description "Installs the artifacts to the local Maven repository." 119 | configuration = configurations['archives'] 120 | repositories { 121 | mavenDeployer { 122 | repository url: "file://${System.properties['user.home']}/.m2/repository" 123 | } 124 | } 125 | } 126 | 127 | task packageJavadoc(type: Jar, dependsOn: 'javadoc') { 128 | from javadoc.destinationDir 129 | classifier = 'javadoc' 130 | } 131 | 132 | task packageSources(type: Jar) { 133 | from sourceSets.main.allSource 134 | classifier = 'sources' 135 | } 136 | 137 | artifacts { 138 | archives(packageJavadoc) { 139 | type = 'javadoc' 140 | } 141 | 142 | archives packageSources 143 | } 144 | 145 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/InvalidMetadataMessageException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | public class InvalidMetadataMessageException extends Exception { 5 | public InvalidMetadataMessageException(String s) { 6 | super(s); 7 | } 8 | 9 | public InvalidMetadataMessageException(Exception s) { 10 | super(s); 11 | } 12 | 13 | } 14 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/InvalidMetadataVersionException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | public class InvalidMetadataVersionException extends Exception { 5 | public InvalidMetadataVersionException(String s) { 6 | super(s); 7 | } 8 | } 9 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/ProtocolDuplicateMessageException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | public class ProtocolDuplicateMessageException extends ProtocolException { 5 | public ProtocolDuplicateMessageException(Exception e, String sender, int senderDevice) { 6 | super(e, sender, senderDevice); 7 | } 8 | } 9 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/ProtocolException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | public abstract class ProtocolException extends Exception { 5 | 6 | private final String sender; 7 | private final int senderDevice; 8 | 9 | public ProtocolException(Exception e, String sender, int senderDevice) { 10 | super(e); 11 | this.sender = sender; 12 | this.senderDevice = senderDevice; 13 | } 14 | 15 | public String getSender() { 16 | return sender; 17 | } 18 | 19 | public int getSenderDevice() { 20 | return senderDevice; 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/ProtocolInvalidKeyException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | import org.whispersystems.libsignal.InvalidKeyException; 5 | 6 | public class ProtocolInvalidKeyException extends ProtocolException { 7 | public ProtocolInvalidKeyException(InvalidKeyException e, String sender, int senderDevice) { 8 | super(e, sender, senderDevice); 9 | } 10 | } 11 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/ProtocolInvalidKeyIdException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | public class ProtocolInvalidKeyIdException extends ProtocolException { 5 | public ProtocolInvalidKeyIdException(Exception e, String sender, int senderDevice) { 6 | super(e, sender, senderDevice); 7 | } 8 | } 9 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/ProtocolInvalidMessageException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | import org.whispersystems.libsignal.InvalidMessageException; 5 | 6 | public class ProtocolInvalidMessageException extends ProtocolException { 7 | public ProtocolInvalidMessageException(InvalidMessageException e, String sender, int senderDevice) { 8 | super(e, sender, senderDevice); 9 | } 10 | } 11 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/ProtocolInvalidVersionException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | import org.whispersystems.libsignal.InvalidVersionException; 5 | 6 | public class ProtocolInvalidVersionException extends ProtocolException { 7 | public ProtocolInvalidVersionException(InvalidVersionException e, String sender, int senderDevice) { 8 | super(e, sender, senderDevice); 9 | } 10 | } 11 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/ProtocolLegacyMessageException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | import org.whispersystems.libsignal.LegacyMessageException; 5 | 6 | public class ProtocolLegacyMessageException extends ProtocolException { 7 | public ProtocolLegacyMessageException(LegacyMessageException e, String sender, int senderDeviceId) { 8 | super(e, sender, senderDeviceId); 9 | } 10 | } 11 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/ProtocolNoSessionException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | import org.whispersystems.libsignal.NoSessionException; 5 | 6 | public class ProtocolNoSessionException extends ProtocolException { 7 | public ProtocolNoSessionException(NoSessionException e, String sender, int senderDevice) { 8 | super(e, sender, senderDevice); 9 | } 10 | } 11 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/ProtocolUntrustedIdentityException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | import org.whispersystems.libsignal.UntrustedIdentityException; 5 | 6 | public class ProtocolUntrustedIdentityException extends ProtocolException { 7 | public ProtocolUntrustedIdentityException(UntrustedIdentityException e, String sender, int senderDevice) { 8 | super(e, sender, senderDevice); 9 | } 10 | } 11 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/SealedSessionCipher.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | import org.signal.libsignal.metadata.certificate.CertificateValidator; 5 | import org.signal.libsignal.metadata.certificate.InvalidCertificateException; 6 | import org.signal.libsignal.metadata.certificate.SenderCertificate; 7 | import org.signal.libsignal.metadata.protocol.UnidentifiedSenderMessage; 8 | import org.signal.libsignal.metadata.protocol.UnidentifiedSenderMessageContent; 9 | import org.whispersystems.libsignal.DuplicateMessageException; 10 | import org.whispersystems.libsignal.IdentityKeyPair; 11 | import org.whispersystems.libsignal.InvalidKeyException; 12 | import org.whispersystems.libsignal.InvalidKeyIdException; 13 | import org.whispersystems.libsignal.InvalidMacException; 14 | import org.whispersystems.libsignal.InvalidMessageException; 15 | import org.whispersystems.libsignal.InvalidVersionException; 16 | import org.whispersystems.libsignal.LegacyMessageException; 17 | import org.whispersystems.libsignal.NoSessionException; 18 | import org.whispersystems.libsignal.SessionCipher; 19 | import org.whispersystems.libsignal.SignalProtocolAddress; 20 | import org.whispersystems.libsignal.UntrustedIdentityException; 21 | import org.whispersystems.libsignal.ecc.Curve; 22 | import org.whispersystems.libsignal.ecc.ECKeyPair; 23 | import org.whispersystems.libsignal.ecc.ECPrivateKey; 24 | import org.whispersystems.libsignal.ecc.ECPublicKey; 25 | import org.whispersystems.libsignal.kdf.HKDFv3; 26 | import org.whispersystems.libsignal.protocol.CiphertextMessage; 27 | import org.whispersystems.libsignal.protocol.PreKeySignalMessage; 28 | import org.whispersystems.libsignal.protocol.SignalMessage; 29 | import org.whispersystems.libsignal.state.SignalProtocolStore; 30 | import org.whispersystems.libsignal.util.ByteUtil; 31 | import org.whispersystems.libsignal.util.guava.Optional; 32 | 33 | import java.security.InvalidAlgorithmParameterException; 34 | import java.security.MessageDigest; 35 | import java.security.NoSuchAlgorithmException; 36 | import java.text.ParseException; 37 | import java.util.UUID; 38 | 39 | import javax.crypto.BadPaddingException; 40 | import javax.crypto.Cipher; 41 | import javax.crypto.IllegalBlockSizeException; 42 | import javax.crypto.Mac; 43 | import javax.crypto.NoSuchPaddingException; 44 | import javax.crypto.spec.IvParameterSpec; 45 | import javax.crypto.spec.SecretKeySpec; 46 | 47 | public class SealedSessionCipher { 48 | 49 | private static final String TAG = SealedSessionCipher.class.getSimpleName(); 50 | 51 | private final SignalProtocolStore signalProtocolStore; 52 | private final String localE164Address; 53 | private final String localUuidAddress; 54 | private final int localDeviceId; 55 | 56 | public SealedSessionCipher(SignalProtocolStore signalProtocolStore, 57 | UUID localUuid, 58 | String localE164Address, 59 | int localDeviceId) 60 | { 61 | this.signalProtocolStore = signalProtocolStore; 62 | this.localUuidAddress = localUuid != null ? localUuid.toString() : null; 63 | this.localE164Address = localE164Address; 64 | this.localDeviceId = localDeviceId; 65 | } 66 | 67 | public byte[] encrypt(SignalProtocolAddress destinationAddress, SenderCertificate senderCertificate, byte[] paddedPlaintext) 68 | throws InvalidKeyException, UntrustedIdentityException 69 | { 70 | CiphertextMessage message = new SessionCipher(signalProtocolStore, destinationAddress).encrypt(paddedPlaintext); 71 | IdentityKeyPair ourIdentity = signalProtocolStore.getIdentityKeyPair(); 72 | ECPublicKey theirIdentity = signalProtocolStore.getIdentity(destinationAddress).getPublicKey(); 73 | 74 | ECKeyPair ephemeral = Curve.generateKeyPair(); 75 | byte[] ephemeralSalt = ByteUtil.combine("UnidentifiedDelivery".getBytes(), theirIdentity.serialize(), ephemeral.getPublicKey().serialize()); 76 | EphemeralKeys ephemeralKeys = calculateEphemeralKeys(theirIdentity, ephemeral.getPrivateKey(), ephemeralSalt); 77 | byte[] staticKeyCiphertext = encrypt(ephemeralKeys.cipherKey, ephemeralKeys.macKey, ourIdentity.getPublicKey().getPublicKey().serialize()); 78 | 79 | byte[] staticSalt = ByteUtil.combine(ephemeralKeys.chainKey, staticKeyCiphertext); 80 | StaticKeys staticKeys = calculateStaticKeys(theirIdentity, ourIdentity.getPrivateKey(), staticSalt); 81 | UnidentifiedSenderMessageContent content = new UnidentifiedSenderMessageContent(message.getType(), senderCertificate, message.serialize()); 82 | byte[] messageBytes = encrypt(staticKeys.cipherKey, staticKeys.macKey, content.getSerialized()); 83 | 84 | return new UnidentifiedSenderMessage(ephemeral.getPublicKey(), staticKeyCiphertext, messageBytes).getSerialized(); 85 | } 86 | 87 | public DecryptionResult decrypt(CertificateValidator validator, byte[] ciphertext, long timestamp) 88 | throws 89 | InvalidMetadataMessageException, InvalidMetadataVersionException, 90 | ProtocolInvalidMessageException, ProtocolInvalidKeyException, 91 | ProtocolNoSessionException, ProtocolLegacyMessageException, 92 | ProtocolInvalidVersionException, ProtocolDuplicateMessageException, 93 | ProtocolInvalidKeyIdException, ProtocolUntrustedIdentityException, 94 | SelfSendException 95 | { 96 | UnidentifiedSenderMessageContent content; 97 | 98 | try { 99 | IdentityKeyPair ourIdentity = signalProtocolStore.getIdentityKeyPair(); 100 | UnidentifiedSenderMessage wrapper = new UnidentifiedSenderMessage(ciphertext); 101 | byte[] ephemeralSalt = ByteUtil.combine("UnidentifiedDelivery".getBytes(), ourIdentity.getPublicKey().getPublicKey().serialize(), wrapper.getEphemeral().serialize()); 102 | EphemeralKeys ephemeralKeys = calculateEphemeralKeys(wrapper.getEphemeral(), ourIdentity.getPrivateKey(), ephemeralSalt); 103 | byte[] staticKeyBytes = decrypt(ephemeralKeys.cipherKey, ephemeralKeys.macKey, wrapper.getEncryptedStatic()); 104 | 105 | ECPublicKey staticKey = Curve.decodePoint(staticKeyBytes, 0); 106 | byte[] staticSalt = ByteUtil.combine(ephemeralKeys.chainKey, wrapper.getEncryptedStatic()); 107 | StaticKeys staticKeys = calculateStaticKeys(staticKey, ourIdentity.getPrivateKey(), staticSalt); 108 | byte[] messageBytes = decrypt(staticKeys.cipherKey, staticKeys.macKey, wrapper.getEncryptedMessage()); 109 | 110 | content = new UnidentifiedSenderMessageContent(messageBytes); 111 | validator.validate(content.getSenderCertificate(), timestamp); 112 | 113 | if (!MessageDigest.isEqual(content.getSenderCertificate().getKey().serialize(), staticKeyBytes)) { 114 | throw new InvalidKeyException("Sender's certificate key does not match key used in message"); 115 | } 116 | 117 | boolean isLocalE164 = localE164Address != null && localE164Address.equals(content.getSenderCertificate().getSenderE164().orNull()); 118 | boolean isLocalUuid = localUuidAddress != null && localUuidAddress.equals(content.getSenderCertificate().getSenderUuid().orNull()); 119 | 120 | if ((isLocalE164 || isLocalUuid) && content.getSenderCertificate().getSenderDeviceId() == localDeviceId) { 121 | throw new SelfSendException(); 122 | } 123 | } catch (InvalidKeyException | InvalidMacException | InvalidCertificateException e) { 124 | throw new InvalidMetadataMessageException(e); 125 | } 126 | 127 | try { 128 | return new DecryptionResult(content.getSenderCertificate().getSenderUuid(), 129 | content.getSenderCertificate().getSenderE164(), 130 | content.getSenderCertificate().getSenderDeviceId(), 131 | decrypt(content)); 132 | } catch (InvalidMessageException e) { 133 | throw new ProtocolInvalidMessageException(e, content.getSenderCertificate().getSender(), content.getSenderCertificate().getSenderDeviceId()); 134 | } catch (InvalidKeyException e) { 135 | throw new ProtocolInvalidKeyException(e, content.getSenderCertificate().getSender(), content.getSenderCertificate().getSenderDeviceId()); 136 | } catch (NoSessionException e) { 137 | throw new ProtocolNoSessionException(e, content.getSenderCertificate().getSender(), content.getSenderCertificate().getSenderDeviceId()); 138 | } catch (LegacyMessageException e) { 139 | throw new ProtocolLegacyMessageException(e, content.getSenderCertificate().getSender(), content.getSenderCertificate().getSenderDeviceId()); 140 | } catch (InvalidVersionException e) { 141 | throw new ProtocolInvalidVersionException(e, content.getSenderCertificate().getSender(), content.getSenderCertificate().getSenderDeviceId()); 142 | } catch (DuplicateMessageException e) { 143 | throw new ProtocolDuplicateMessageException(e, content.getSenderCertificate().getSender(), content.getSenderCertificate().getSenderDeviceId()); 144 | } catch (InvalidKeyIdException e) { 145 | throw new ProtocolInvalidKeyIdException(e, content.getSenderCertificate().getSender(), content.getSenderCertificate().getSenderDeviceId()); 146 | } catch (UntrustedIdentityException e) { 147 | throw new ProtocolUntrustedIdentityException(e, content.getSenderCertificate().getSender(), content.getSenderCertificate().getSenderDeviceId()); 148 | } 149 | } 150 | 151 | public int getSessionVersion(SignalProtocolAddress remoteAddress) { 152 | return new SessionCipher(signalProtocolStore, remoteAddress).getSessionVersion(); 153 | } 154 | 155 | public int getRemoteRegistrationId(SignalProtocolAddress remoteAddress) { 156 | return new SessionCipher(signalProtocolStore, remoteAddress).getRemoteRegistrationId(); 157 | } 158 | 159 | private EphemeralKeys calculateEphemeralKeys(ECPublicKey ephemeralPublic, ECPrivateKey ephemeralPrivate, byte[] salt) throws InvalidKeyException { 160 | try { 161 | byte[] ephemeralSecret = Curve.calculateAgreement(ephemeralPublic, ephemeralPrivate); 162 | byte[] ephemeralDerived = new HKDFv3().deriveSecrets(ephemeralSecret, salt, new byte[0], 96); 163 | byte[][] ephemeralDerivedParts = ByteUtil.split(ephemeralDerived, 32, 32, 32); 164 | 165 | return new EphemeralKeys(ephemeralDerivedParts[0], ephemeralDerivedParts[1], ephemeralDerivedParts[2]); 166 | } catch (ParseException e) { 167 | throw new AssertionError(e); 168 | } 169 | } 170 | 171 | private StaticKeys calculateStaticKeys(ECPublicKey staticPublic, ECPrivateKey staticPrivate, byte[] salt) throws InvalidKeyException { 172 | try { 173 | byte[] staticSecret = Curve.calculateAgreement(staticPublic, staticPrivate); 174 | byte[] staticDerived = new HKDFv3().deriveSecrets(staticSecret, salt, new byte[0], 96); 175 | byte[][] staticDerivedParts = ByteUtil.split(staticDerived, 32, 32, 32); 176 | 177 | return new StaticKeys(staticDerivedParts[1], staticDerivedParts[2]); 178 | } catch (ParseException e) { 179 | throw new AssertionError(e); 180 | } 181 | } 182 | 183 | private byte[] decrypt(UnidentifiedSenderMessageContent message) 184 | throws InvalidVersionException, InvalidMessageException, InvalidKeyException, DuplicateMessageException, InvalidKeyIdException, UntrustedIdentityException, LegacyMessageException, NoSessionException 185 | { 186 | SignalProtocolAddress sender = getPreferredAddress(signalProtocolStore, message.getSenderCertificate()); 187 | 188 | switch (message.getType()) { 189 | case CiphertextMessage.WHISPER_TYPE: return new SessionCipher(signalProtocolStore, sender).decrypt(new SignalMessage(message.getContent())); 190 | case CiphertextMessage.PREKEY_TYPE: return new SessionCipher(signalProtocolStore, sender).decrypt(new PreKeySignalMessage(message.getContent())); 191 | default: throw new InvalidMessageException("Unknown type: " + message.getType()); 192 | } 193 | } 194 | 195 | private byte[] encrypt(SecretKeySpec cipherKey, SecretKeySpec macKey, byte[] plaintext) { 196 | try { 197 | Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding"); 198 | cipher.init(Cipher.ENCRYPT_MODE, cipherKey, new IvParameterSpec(new byte[16])); 199 | 200 | Mac mac = Mac.getInstance("HmacSHA256"); 201 | mac.init(macKey); 202 | 203 | byte[] ciphertext = cipher.doFinal(plaintext); 204 | byte[] ourFullMac = mac.doFinal(ciphertext); 205 | byte[] ourMac = ByteUtil.trim(ourFullMac, 10); 206 | 207 | return ByteUtil.combine(ciphertext, ourMac); 208 | } catch (NoSuchAlgorithmException | NoSuchPaddingException | java.security.InvalidKeyException | BadPaddingException | IllegalBlockSizeException | InvalidAlgorithmParameterException e) { 209 | throw new AssertionError(e); 210 | } 211 | } 212 | 213 | private byte[] decrypt(SecretKeySpec cipherKey, SecretKeySpec macKey, byte[] ciphertext) throws InvalidMacException { 214 | try { 215 | if (ciphertext.length < 10) { 216 | throw new InvalidMacException("Ciphertext not long enough for MAC!"); 217 | } 218 | 219 | byte[][] ciphertextParts = ByteUtil.split(ciphertext, ciphertext.length - 10, 10); 220 | 221 | Mac mac = Mac.getInstance("HmacSHA256"); 222 | mac.init(macKey); 223 | 224 | byte[] digest = mac.doFinal(ciphertextParts[0]); 225 | byte[] ourMac = ByteUtil.trim(digest, 10); 226 | byte[] theirMac = ciphertextParts[1]; 227 | 228 | if (!MessageDigest.isEqual(ourMac, theirMac)) { 229 | throw new InvalidMacException("Bad mac!"); 230 | } 231 | 232 | Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding"); 233 | cipher.init(Cipher.DECRYPT_MODE, cipherKey, new IvParameterSpec(new byte[16])); 234 | 235 | return cipher.doFinal(ciphertextParts[0]); 236 | } catch (NoSuchAlgorithmException | java.security.InvalidKeyException | NoSuchPaddingException | InvalidAlgorithmParameterException | IllegalBlockSizeException | BadPaddingException e) { 237 | throw new AssertionError(e); 238 | } 239 | } 240 | 241 | private static SignalProtocolAddress getPreferredAddress(SignalProtocolStore store, SenderCertificate certificate) { 242 | SignalProtocolAddress uuidAddress = certificate.getSenderUuid().isPresent() ? new SignalProtocolAddress(certificate.getSenderUuid().get(), certificate.getSenderDeviceId()) : null; 243 | SignalProtocolAddress e164Address = certificate.getSenderE164().isPresent() ? new SignalProtocolAddress(certificate.getSenderE164().get(), certificate.getSenderDeviceId()) : null; 244 | 245 | if (uuidAddress != null && store.containsSession(uuidAddress)) { 246 | return uuidAddress; 247 | } else if (e164Address != null && store.containsSession(e164Address)) { 248 | return e164Address; 249 | } else { 250 | return new SignalProtocolAddress(certificate.getSender(), certificate.getSenderDeviceId()); 251 | } 252 | } 253 | 254 | public static class DecryptionResult { 255 | private final Optional senderUuid; 256 | private final Optional senderE164; 257 | private final int deviceId; 258 | private final byte[] paddedMessage; 259 | 260 | private DecryptionResult(Optional senderUuid, Optional senderE164, int deviceId, byte[] paddedMessage) { 261 | this.senderUuid = senderUuid; 262 | this.senderE164 = senderE164; 263 | this.deviceId = deviceId; 264 | this.paddedMessage = paddedMessage; 265 | } 266 | 267 | public Optional getSenderUuid() { 268 | return senderUuid; 269 | } 270 | 271 | public Optional getSenderE164() { 272 | return senderE164; 273 | } 274 | 275 | public int getDeviceId() { 276 | return deviceId; 277 | } 278 | 279 | public byte[] getPaddedMessage() { 280 | return paddedMessage; 281 | } 282 | } 283 | 284 | private static class EphemeralKeys { 285 | private final byte[] chainKey; 286 | private final SecretKeySpec cipherKey; 287 | private final SecretKeySpec macKey; 288 | 289 | private EphemeralKeys(byte[] chainKey, byte[] cipherKey, byte[] macKey) { 290 | this.chainKey = chainKey; 291 | this.cipherKey = new SecretKeySpec(cipherKey, "AES"); 292 | this.macKey = new SecretKeySpec(macKey, "HmacSHA256"); 293 | } 294 | } 295 | 296 | private static class StaticKeys { 297 | private final SecretKeySpec cipherKey; 298 | private final SecretKeySpec macKey; 299 | 300 | private StaticKeys(byte[] cipherKey, byte[] macKey) { 301 | this.cipherKey = new SecretKeySpec(cipherKey, "AES"); 302 | this.macKey = new SecretKeySpec(macKey, "HmacSHA256"); 303 | } 304 | } 305 | 306 | } 307 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/SelfSendException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | public class SelfSendException extends Exception { 5 | } 6 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/certificate/CertificateValidator.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata.certificate; 2 | 3 | 4 | import org.whispersystems.libsignal.InvalidKeyException; 5 | import org.whispersystems.libsignal.ecc.Curve; 6 | import org.whispersystems.libsignal.ecc.ECPublicKey; 7 | 8 | import java.util.HashSet; 9 | import java.util.Set; 10 | 11 | public class CertificateValidator { 12 | 13 | @SuppressWarnings("MismatchedQueryAndUpdateOfCollection") 14 | private static final Set REVOKED = new HashSet() {{ 15 | 16 | }}; 17 | 18 | private final ECPublicKey trustRoot; 19 | 20 | public CertificateValidator(ECPublicKey trustRoot) { 21 | this.trustRoot = trustRoot; 22 | } 23 | 24 | public void validate(SenderCertificate certificate, long validationTime) throws InvalidCertificateException { 25 | try { 26 | ServerCertificate serverCertificate = certificate.getSigner(); 27 | validate(serverCertificate); 28 | 29 | if (!Curve.verifySignature(serverCertificate.getKey(), certificate.getCertificate(), certificate.getSignature())) { 30 | throw new InvalidCertificateException("Signature failed"); 31 | } 32 | 33 | if (validationTime > certificate.getExpiration()) { 34 | throw new InvalidCertificateException("Certificate is expired"); 35 | } 36 | } catch (InvalidKeyException e) { 37 | throw new InvalidCertificateException(e); 38 | } 39 | } 40 | 41 | // VisibleForTesting 42 | void validate(ServerCertificate certificate) throws InvalidCertificateException { 43 | try { 44 | if (!Curve.verifySignature(trustRoot, certificate.getCertificate(), certificate.getSignature())) { 45 | throw new InvalidCertificateException("Signature failed"); 46 | } 47 | 48 | if (REVOKED.contains(certificate.getKeyId())) { 49 | throw new InvalidCertificateException("Server certificate has been revoked"); 50 | } 51 | } catch (InvalidKeyException e) { 52 | throw new InvalidCertificateException(e); 53 | } 54 | } 55 | } 56 | 57 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/certificate/InvalidCertificateException.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata.certificate; 2 | 3 | 4 | public class InvalidCertificateException extends Exception { 5 | public InvalidCertificateException(String s) { 6 | super(s); 7 | } 8 | 9 | public InvalidCertificateException(Exception e) { 10 | super(e); 11 | } 12 | } 13 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/certificate/SenderCertificate.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata.certificate; 2 | 3 | 4 | import com.google.protobuf.InvalidProtocolBufferException; 5 | 6 | import org.signal.libsignal.metadata.SignalProtos; 7 | import org.whispersystems.libsignal.InvalidKeyException; 8 | import org.whispersystems.libsignal.ecc.Curve; 9 | import org.whispersystems.libsignal.ecc.ECPublicKey; 10 | import org.whispersystems.libsignal.util.guava.Optional; 11 | 12 | 13 | public class SenderCertificate { 14 | 15 | private final ServerCertificate signer; 16 | private final ECPublicKey key; 17 | private final int senderDeviceId; 18 | private final Optional senderUuid; 19 | private final Optional senderE164; 20 | private final long expiration; 21 | 22 | private final byte[] serialized; 23 | private final byte[] certificate; 24 | private final byte[] signature; 25 | 26 | public SenderCertificate(byte[] serialized) throws InvalidCertificateException { 27 | try { 28 | SignalProtos.SenderCertificate wrapper = SignalProtos.SenderCertificate.parseFrom(serialized); 29 | 30 | if (!wrapper.hasSignature() || !wrapper.hasCertificate()) { 31 | throw new InvalidCertificateException("Missing fields"); 32 | } 33 | 34 | SignalProtos.SenderCertificate.Certificate certificate = SignalProtos.SenderCertificate.Certificate.parseFrom(wrapper.getCertificate()); 35 | 36 | if (!certificate.hasSigner() || 37 | !certificate.hasIdentityKey() || 38 | !certificate.hasSenderDevice() || 39 | !certificate.hasExpires() || 40 | (!certificate.hasSenderUuid() && !certificate.hasSenderE164())) 41 | { 42 | throw new InvalidCertificateException("Missing fields"); 43 | } 44 | 45 | this.signer = new ServerCertificate(certificate.getSigner().toByteArray()); 46 | this.key = Curve.decodePoint(certificate.getIdentityKey().toByteArray(), 0); 47 | this.senderUuid = certificate.hasSenderUuid() ? Optional.of(certificate.getSenderUuid()) : Optional.absent(); 48 | this.senderE164 = certificate.hasSenderE164() ? Optional.of(certificate.getSenderE164()) : Optional.absent(); 49 | this.senderDeviceId = certificate.getSenderDevice(); 50 | this.expiration = certificate.getExpires(); 51 | 52 | this.serialized = serialized; 53 | this.certificate = wrapper.getCertificate().toByteArray(); 54 | this.signature = wrapper.getSignature().toByteArray(); 55 | 56 | } catch (InvalidProtocolBufferException | InvalidKeyException e) { 57 | throw new InvalidCertificateException(e); 58 | } 59 | } 60 | 61 | public ServerCertificate getSigner() { 62 | return signer; 63 | } 64 | 65 | public ECPublicKey getKey() { 66 | return key; 67 | } 68 | 69 | public int getSenderDeviceId() { 70 | return senderDeviceId; 71 | } 72 | 73 | public Optional getSenderUuid() { 74 | return senderUuid; 75 | } 76 | 77 | public Optional getSenderE164() { 78 | return senderE164; 79 | } 80 | 81 | public String getSender() { 82 | return senderE164.or(senderUuid).orNull(); 83 | } 84 | 85 | public long getExpiration() { 86 | return expiration; 87 | } 88 | 89 | public byte[] getSerialized() { 90 | return serialized; 91 | } 92 | 93 | public byte[] getCertificate() { 94 | return certificate; 95 | } 96 | 97 | public byte[] getSignature() { 98 | return signature; 99 | } 100 | } 101 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/certificate/ServerCertificate.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata.certificate; 2 | 3 | 4 | import com.google.protobuf.InvalidProtocolBufferException; 5 | 6 | import org.signal.libsignal.metadata.SignalProtos; 7 | import org.whispersystems.libsignal.InvalidKeyException; 8 | import org.whispersystems.libsignal.ecc.Curve; 9 | import org.whispersystems.libsignal.ecc.ECPublicKey; 10 | 11 | public class ServerCertificate { 12 | 13 | private final int keyId; 14 | private final ECPublicKey key; 15 | 16 | private final byte[] serialized; 17 | private final byte[] certificate; 18 | private final byte[] signature; 19 | 20 | public ServerCertificate(byte[] serialized) throws InvalidCertificateException { 21 | try { 22 | SignalProtos.ServerCertificate wrapper = SignalProtos.ServerCertificate.parseFrom(serialized); 23 | 24 | if (!wrapper.hasCertificate() || !wrapper.hasSignature()) { 25 | throw new InvalidCertificateException("Missing fields"); 26 | } 27 | 28 | SignalProtos.ServerCertificate.Certificate certificate = SignalProtos.ServerCertificate.Certificate.parseFrom(wrapper.getCertificate()); 29 | 30 | if (!certificate.hasId() || !certificate.hasKey()) { 31 | throw new InvalidCertificateException("Missing fields"); 32 | } 33 | 34 | this.keyId = certificate.getId(); 35 | this.key = Curve.decodePoint(certificate.getKey().toByteArray(), 0); 36 | this.serialized = serialized; 37 | this.certificate = wrapper.getCertificate().toByteArray(); 38 | this.signature = wrapper.getSignature().toByteArray(); 39 | 40 | } catch (InvalidProtocolBufferException | InvalidKeyException e) { 41 | throw new InvalidCertificateException(e); 42 | } 43 | } 44 | 45 | public int getKeyId() { 46 | return keyId; 47 | } 48 | 49 | public ECPublicKey getKey() { 50 | return key; 51 | } 52 | 53 | public byte[] getSerialized() { 54 | return serialized; 55 | } 56 | 57 | public byte[] getCertificate() { 58 | return certificate; 59 | } 60 | 61 | public byte[] getSignature() { 62 | return signature; 63 | } 64 | } 65 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/protocol/UnidentifiedSenderMessage.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata.protocol; 2 | 3 | 4 | import com.google.protobuf.ByteString; 5 | import com.google.protobuf.InvalidProtocolBufferException; 6 | 7 | import org.signal.libsignal.metadata.InvalidMetadataMessageException; 8 | import org.signal.libsignal.metadata.InvalidMetadataVersionException; 9 | import org.signal.libsignal.metadata.SignalProtos; 10 | import org.whispersystems.libsignal.InvalidKeyException; 11 | import org.whispersystems.libsignal.InvalidMessageException; 12 | import org.whispersystems.libsignal.InvalidVersionException; 13 | import org.whispersystems.libsignal.ecc.Curve; 14 | import org.whispersystems.libsignal.ecc.ECPublicKey; 15 | import org.whispersystems.libsignal.util.ByteUtil; 16 | 17 | public class UnidentifiedSenderMessage { 18 | 19 | private static final int CIPHERTEXT_VERSION = 1; 20 | 21 | private final int version; 22 | private final ECPublicKey ephemeral; 23 | private final byte[] encryptedStatic; 24 | private final byte[] encryptedMessage; 25 | private final byte[] serialized; 26 | 27 | public UnidentifiedSenderMessage(byte[] serialized) 28 | throws InvalidMetadataMessageException, InvalidMetadataVersionException 29 | { 30 | try { 31 | this.version = ByteUtil.highBitsToInt(serialized[0]); 32 | 33 | if (version > CIPHERTEXT_VERSION) { 34 | throw new InvalidMetadataVersionException("Unknown version: " + this.version); 35 | } 36 | 37 | SignalProtos.UnidentifiedSenderMessage unidentifiedSenderMessage = SignalProtos.UnidentifiedSenderMessage.parseFrom(ByteString.copyFrom(serialized, 1, serialized.length - 1)); 38 | 39 | if (!unidentifiedSenderMessage.hasEphemeralPublic() || 40 | !unidentifiedSenderMessage.hasEncryptedStatic() || 41 | !unidentifiedSenderMessage.hasEncryptedMessage()) 42 | { 43 | throw new InvalidMetadataMessageException("Missing fields"); 44 | } 45 | 46 | this.ephemeral = Curve.decodePoint(unidentifiedSenderMessage.getEphemeralPublic().toByteArray(), 0); 47 | this.encryptedStatic = unidentifiedSenderMessage.getEncryptedStatic().toByteArray(); 48 | this.encryptedMessage = unidentifiedSenderMessage.getEncryptedMessage().toByteArray(); 49 | this.serialized = serialized; 50 | } catch (InvalidProtocolBufferException | InvalidKeyException e) { 51 | throw new InvalidMetadataMessageException(e); 52 | } 53 | } 54 | 55 | public UnidentifiedSenderMessage(ECPublicKey ephemeral, byte[] encryptedStatic, byte[] encryptedMessage) { 56 | this.version = CIPHERTEXT_VERSION; 57 | this.ephemeral = ephemeral; 58 | this.encryptedStatic = encryptedStatic; 59 | this.encryptedMessage = encryptedMessage; 60 | 61 | byte[] versionBytes = {ByteUtil.intsToByteHighAndLow(CIPHERTEXT_VERSION, CIPHERTEXT_VERSION)}; 62 | byte[] messageBytes = SignalProtos.UnidentifiedSenderMessage.newBuilder() 63 | .setEncryptedMessage(ByteString.copyFrom(encryptedMessage)) 64 | .setEncryptedStatic(ByteString.copyFrom(encryptedStatic)) 65 | .setEphemeralPublic(ByteString.copyFrom(ephemeral.serialize())) 66 | .build() 67 | .toByteArray(); 68 | 69 | this.serialized = ByteUtil.combine(versionBytes, messageBytes); 70 | } 71 | 72 | public ECPublicKey getEphemeral() { 73 | return ephemeral; 74 | } 75 | 76 | public byte[] getEncryptedStatic() { 77 | return encryptedStatic; 78 | } 79 | 80 | public byte[] getEncryptedMessage() { 81 | return encryptedMessage; 82 | } 83 | 84 | public byte[] getSerialized() { 85 | return serialized; 86 | } 87 | } 88 | -------------------------------------------------------------------------------- /java/src/main/java/org/signal/libsignal/metadata/protocol/UnidentifiedSenderMessageContent.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata.protocol; 2 | 3 | 4 | import com.google.protobuf.ByteString; 5 | import com.google.protobuf.InvalidProtocolBufferException; 6 | 7 | import org.signal.libsignal.metadata.InvalidMetadataMessageException; 8 | import org.signal.libsignal.metadata.SignalProtos; 9 | import org.signal.libsignal.metadata.certificate.InvalidCertificateException; 10 | import org.signal.libsignal.metadata.certificate.SenderCertificate; 11 | import org.whispersystems.libsignal.InvalidMessageException; 12 | import org.whispersystems.libsignal.protocol.CiphertextMessage; 13 | 14 | public class UnidentifiedSenderMessageContent { 15 | 16 | private final int type; 17 | private final SenderCertificate senderCertificate; 18 | private final byte[] content; 19 | private final byte[] serialized; 20 | 21 | public UnidentifiedSenderMessageContent(byte[] serialized) throws InvalidMetadataMessageException, InvalidCertificateException { 22 | try { 23 | SignalProtos.UnidentifiedSenderMessage.Message message = SignalProtos.UnidentifiedSenderMessage.Message.parseFrom(serialized); 24 | 25 | if (!message.hasType() || !message.hasSenderCertificate() || !message.hasContent()) { 26 | throw new InvalidMetadataMessageException("Missing fields"); 27 | } 28 | 29 | switch (message.getType()) { 30 | case MESSAGE: this.type = CiphertextMessage.WHISPER_TYPE; break; 31 | case PREKEY_MESSAGE: this.type = CiphertextMessage.PREKEY_TYPE; break; 32 | default: throw new InvalidMetadataMessageException("Unknown type: " + message.getType().getNumber()); 33 | } 34 | 35 | this.senderCertificate = new SenderCertificate(message.getSenderCertificate().toByteArray()); 36 | this.content = message.getContent().toByteArray(); 37 | this.serialized = serialized; 38 | } catch (InvalidProtocolBufferException e) { 39 | throw new InvalidMetadataMessageException(e); 40 | } 41 | } 42 | 43 | public UnidentifiedSenderMessageContent(int type, SenderCertificate senderCertificate, byte[] content) { 44 | try { 45 | this.serialized = SignalProtos.UnidentifiedSenderMessage.Message.newBuilder() 46 | .setType(SignalProtos.UnidentifiedSenderMessage.Message.Type.valueOf(getProtoType(type))) 47 | .setSenderCertificate(SignalProtos.SenderCertificate.parseFrom(senderCertificate.getSerialized())) 48 | .setContent(ByteString.copyFrom(content)) 49 | .build() 50 | .toByteArray(); 51 | 52 | this.type = type; 53 | this.senderCertificate = senderCertificate; 54 | this.content = content; 55 | } catch (InvalidProtocolBufferException e) { 56 | throw new AssertionError(e); 57 | } 58 | } 59 | 60 | public int getType() { 61 | return type; 62 | } 63 | 64 | public SenderCertificate getSenderCertificate() { 65 | return senderCertificate; 66 | } 67 | 68 | public byte[] getContent() { 69 | return content; 70 | } 71 | 72 | public byte[] getSerialized() { 73 | return serialized; 74 | } 75 | 76 | private int getProtoType(int type) { 77 | switch (type) { 78 | case CiphertextMessage.WHISPER_TYPE: return SignalProtos.UnidentifiedSenderMessage.Message.Type.MESSAGE_VALUE; 79 | case CiphertextMessage.PREKEY_TYPE: return SignalProtos.UnidentifiedSenderMessage.Message.Type.PREKEY_MESSAGE_VALUE; 80 | default: throw new AssertionError(type); 81 | } 82 | } 83 | 84 | } 85 | -------------------------------------------------------------------------------- /protobuf/UnidentifiedDelivery.proto: -------------------------------------------------------------------------------- 1 | syntax = "proto2"; 2 | 3 | package signal; 4 | 5 | option java_package = "org.signal.libsignal.metadata"; 6 | option java_outer_classname = "SignalProtos"; 7 | 8 | message ServerCertificate { 9 | message Certificate { 10 | optional uint32 id = 1; 11 | optional bytes key = 2; 12 | } 13 | 14 | optional bytes certificate = 1; 15 | optional bytes signature = 2; 16 | } 17 | 18 | message SenderCertificate { 19 | message Certificate { 20 | optional string senderE164 = 1; 21 | optional string senderUuid = 6; 22 | optional uint32 senderDevice = 2; 23 | optional fixed64 expires = 3; 24 | optional bytes identityKey = 4; 25 | optional ServerCertificate signer = 5; 26 | } 27 | 28 | optional bytes certificate = 1; 29 | optional bytes signature = 2; 30 | } 31 | 32 | message UnidentifiedSenderMessage { 33 | 34 | message Message { 35 | enum Type { 36 | PREKEY_MESSAGE = 1; 37 | MESSAGE = 2; 38 | } 39 | 40 | optional Type type = 1; 41 | optional SenderCertificate senderCertificate = 2; 42 | optional bytes content = 3; 43 | } 44 | 45 | optional bytes ephemeralPublic = 1; 46 | optional bytes encryptedStatic = 2; 47 | optional bytes encryptedMessage = 3; 48 | } -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':java', ':android', ':tests' 2 | -------------------------------------------------------------------------------- /tests/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'java' 2 | 3 | repositories { 4 | mavenCentral() 5 | mavenLocal() 6 | } 7 | 8 | dependencies { 9 | testCompile 'junit:junit:4.12' 10 | 11 | compile project(':java') 12 | } -------------------------------------------------------------------------------- /tests/src/test/java/org/signal/libsignal/metadata/SealedSessionCipherTest.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | import com.google.protobuf.ByteString; 4 | import com.google.protobuf.InvalidProtocolBufferException; 5 | 6 | import junit.framework.TestCase; 7 | 8 | import org.signal.libsignal.metadata.SealedSessionCipher.DecryptionResult; 9 | import org.signal.libsignal.metadata.certificate.CertificateValidator; 10 | import org.signal.libsignal.metadata.certificate.InvalidCertificateException; 11 | import org.signal.libsignal.metadata.certificate.SenderCertificate; 12 | import org.signal.libsignal.metadata.certificate.ServerCertificate; 13 | import org.whispersystems.libsignal.IdentityKeyPair; 14 | import org.whispersystems.libsignal.InvalidKeyException; 15 | import org.whispersystems.libsignal.SessionBuilder; 16 | import org.whispersystems.libsignal.SignalProtocolAddress; 17 | import org.whispersystems.libsignal.UntrustedIdentityException; 18 | import org.whispersystems.libsignal.ecc.Curve; 19 | import org.whispersystems.libsignal.ecc.ECKeyPair; 20 | import org.whispersystems.libsignal.ecc.ECPublicKey; 21 | import org.whispersystems.libsignal.state.PreKeyBundle; 22 | import org.whispersystems.libsignal.state.PreKeyRecord; 23 | import org.whispersystems.libsignal.state.SignedPreKeyRecord; 24 | import org.whispersystems.libsignal.util.KeyHelper; 25 | import org.whispersystems.libsignal.util.Pair; 26 | 27 | import java.util.UUID; 28 | 29 | public class SealedSessionCipherTest extends TestCase { 30 | 31 | public void testEncryptDecrypt() throws UntrustedIdentityException, InvalidKeyException, InvalidCertificateException, InvalidProtocolBufferException, InvalidMetadataMessageException, ProtocolDuplicateMessageException, ProtocolUntrustedIdentityException, ProtocolLegacyMessageException, ProtocolInvalidKeyException, InvalidMetadataVersionException, ProtocolInvalidVersionException, ProtocolInvalidMessageException, ProtocolInvalidKeyIdException, ProtocolNoSessionException, SelfSendException { 32 | TestInMemorySignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore(); 33 | TestInMemorySignalProtocolStore bobStore = new TestInMemorySignalProtocolStore(); 34 | 35 | initializeSessions(aliceStore, bobStore); 36 | 37 | ECKeyPair trustRoot = Curve.generateKeyPair(); 38 | SenderCertificate senderCertificate = createCertificateFor(trustRoot, UUID.fromString("9d0652a3-dcc3-4d11-975f-74d61598733f"), "+14151111111", 1, aliceStore.getIdentityKeyPair().getPublicKey().getPublicKey(), 31337); 39 | SealedSessionCipher aliceCipher = new SealedSessionCipher(aliceStore, UUID.fromString("9d0652a3-dcc3-4d11-975f-74d61598733f"), "+14151111111", 1); 40 | 41 | byte[] ciphertext = aliceCipher.encrypt(new SignalProtocolAddress("+14152222222", 1), 42 | senderCertificate, "smert za smert".getBytes()); 43 | 44 | 45 | SealedSessionCipher bobCipher = new SealedSessionCipher(bobStore, UUID.fromString("e80f7bbe-5b94-471e-bd8c-2173654ea3d1"), "+14152222222", 1); 46 | 47 | DecryptionResult plaintext = bobCipher.decrypt(new CertificateValidator(trustRoot.getPublicKey()), ciphertext, 31335); 48 | 49 | assertEquals(new String(plaintext.getPaddedMessage()), "smert za smert"); 50 | assertEquals(plaintext.getSenderUuid().get(), "9d0652a3-dcc3-4d11-975f-74d61598733f"); 51 | assertEquals(plaintext.getSenderE164().get(), "+14151111111"); 52 | assertEquals(plaintext.getDeviceId(), 1); 53 | } 54 | 55 | public void testEncryptDecryptUntrusted() throws Exception { 56 | TestInMemorySignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore(); 57 | TestInMemorySignalProtocolStore bobStore = new TestInMemorySignalProtocolStore(); 58 | 59 | initializeSessions(aliceStore, bobStore); 60 | 61 | ECKeyPair trustRoot = Curve.generateKeyPair(); 62 | ECKeyPair falseTrustRoot = Curve.generateKeyPair(); 63 | SenderCertificate senderCertificate = createCertificateFor(falseTrustRoot, UUID.fromString("9d0652a3-dcc3-4d11-975f-74d61598733f"), "+14151111111", 1, aliceStore.getIdentityKeyPair().getPublicKey().getPublicKey(), 31337); 64 | SealedSessionCipher aliceCipher = new SealedSessionCipher(aliceStore, UUID.fromString("9d0652a3-dcc3-4d11-975f-74d61598733f"), "+14151111111", 1); 65 | 66 | byte[] ciphertext = aliceCipher.encrypt(new SignalProtocolAddress("+14152222222", 1), 67 | senderCertificate, "и вот я".getBytes()); 68 | 69 | SealedSessionCipher bobCipher = new SealedSessionCipher(bobStore, UUID.fromString("e80f7bbe-5b94-471e-bd8c-2173654ea3d1"), "+14152222222", 1); 70 | 71 | try { 72 | bobCipher.decrypt(new CertificateValidator(trustRoot.getPublicKey()), ciphertext, 31335); 73 | throw new AssertionError(); 74 | } catch (InvalidMetadataMessageException e) { 75 | // good 76 | } 77 | } 78 | 79 | public void testEncryptDecryptExpired() throws Exception { 80 | TestInMemorySignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore(); 81 | TestInMemorySignalProtocolStore bobStore = new TestInMemorySignalProtocolStore(); 82 | 83 | initializeSessions(aliceStore, bobStore); 84 | 85 | ECKeyPair trustRoot = Curve.generateKeyPair(); 86 | SenderCertificate senderCertificate = createCertificateFor(trustRoot, UUID.fromString("9d0652a3-dcc3-4d11-975f-74d61598733f"), "+14151111111", 1, aliceStore.getIdentityKeyPair().getPublicKey().getPublicKey(), 31337); 87 | SealedSessionCipher aliceCipher = new SealedSessionCipher(aliceStore, UUID.fromString("9d0652a3-dcc3-4d11-975f-74d61598733f"), "+14151111111", 1); 88 | 89 | byte[] ciphertext = aliceCipher.encrypt(new SignalProtocolAddress("+14152222222", 1), 90 | senderCertificate, "и вот я".getBytes()); 91 | 92 | SealedSessionCipher bobCipher = new SealedSessionCipher(bobStore, UUID.fromString("e80f7bbe-5b94-471e-bd8c-2173654ea3d1"), "+14152222222", 1); 93 | 94 | try { 95 | bobCipher.decrypt(new CertificateValidator(trustRoot.getPublicKey()), ciphertext, 31338); 96 | throw new AssertionError(); 97 | } catch (InvalidMetadataMessageException e) { 98 | // good 99 | } 100 | } 101 | 102 | public void testEncryptFromWrongIdentity() throws Exception { 103 | TestInMemorySignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore(); 104 | TestInMemorySignalProtocolStore bobStore = new TestInMemorySignalProtocolStore(); 105 | 106 | initializeSessions(aliceStore, bobStore); 107 | 108 | ECKeyPair trustRoot = Curve.generateKeyPair(); 109 | ECKeyPair randomKeyPair = Curve.generateKeyPair(); 110 | SenderCertificate senderCertificate = createCertificateFor(trustRoot, UUID.fromString("9d0652a3-dcc3-4d11-975f-74d61598733f"), "+14151111111", 1, randomKeyPair.getPublicKey(), 31337); 111 | SealedSessionCipher aliceCipher = new SealedSessionCipher(aliceStore, UUID.fromString("9d0652a3-dcc3-4d11-975f-74d61598733f"), "+14151111111", 1); 112 | 113 | byte[] ciphertext = aliceCipher.encrypt(new SignalProtocolAddress("+14152222222", 1), 114 | senderCertificate, "smert za smert".getBytes()); 115 | 116 | 117 | SealedSessionCipher bobCipher = new SealedSessionCipher(bobStore, UUID.fromString("e80f7bbe-5b94-471e-bd8c-2173654ea3d1"), "+14152222222", 1); 118 | 119 | try { 120 | bobCipher.decrypt(new CertificateValidator(trustRoot.getPublicKey()), ciphertext, 31335); 121 | } catch (InvalidMetadataMessageException e) { 122 | // good 123 | } 124 | } 125 | 126 | 127 | 128 | private SenderCertificate createCertificateFor(ECKeyPair trustRoot, UUID uuid, String e164, int deviceId, ECPublicKey identityKey, long expires) 129 | throws InvalidKeyException, InvalidCertificateException, InvalidProtocolBufferException { 130 | ECKeyPair serverKey = Curve.generateKeyPair(); 131 | 132 | byte[] serverCertificateBytes = SignalProtos.ServerCertificate.Certificate.newBuilder() 133 | .setId(1) 134 | .setKey(ByteString.copyFrom(serverKey.getPublicKey().serialize())) 135 | .build() 136 | .toByteArray(); 137 | 138 | byte[] serverCertificateSignature = Curve.calculateSignature(trustRoot.getPrivateKey(), serverCertificateBytes); 139 | 140 | ServerCertificate serverCertificate = new ServerCertificate(SignalProtos.ServerCertificate.newBuilder() 141 | .setCertificate(ByteString.copyFrom(serverCertificateBytes)) 142 | .setSignature(ByteString.copyFrom(serverCertificateSignature)) 143 | .build() 144 | .toByteArray()); 145 | 146 | byte[] senderCertificateBytes = SignalProtos.SenderCertificate.Certificate.newBuilder() 147 | .setSenderUuid(uuid.toString()) 148 | .setSenderE164(e164) 149 | .setSenderDevice(deviceId) 150 | .setIdentityKey(ByteString.copyFrom(identityKey.serialize())) 151 | .setExpires(expires) 152 | .setSigner(SignalProtos.ServerCertificate.parseFrom(serverCertificate.getSerialized())) 153 | .build() 154 | .toByteArray(); 155 | 156 | byte[] senderCertificateSignature = Curve.calculateSignature(serverKey.getPrivateKey(), senderCertificateBytes); 157 | 158 | return new SenderCertificate(SignalProtos.SenderCertificate.newBuilder() 159 | .setCertificate(ByteString.copyFrom(senderCertificateBytes)) 160 | .setSignature(ByteString.copyFrom(senderCertificateSignature)) 161 | .build() 162 | .toByteArray()); 163 | } 164 | 165 | private void initializeSessions(TestInMemorySignalProtocolStore aliceStore, TestInMemorySignalProtocolStore bobStore) 166 | throws InvalidKeyException, UntrustedIdentityException 167 | { 168 | ECKeyPair bobPreKey = Curve.generateKeyPair(); 169 | IdentityKeyPair bobIdentityKey = bobStore.getIdentityKeyPair(); 170 | SignedPreKeyRecord bobSignedPreKey = KeyHelper.generateSignedPreKey(bobIdentityKey, 2); 171 | 172 | PreKeyBundle bobBundle = new PreKeyBundle(1, 1, 1, bobPreKey.getPublicKey(), 2, bobSignedPreKey.getKeyPair().getPublicKey(), bobSignedPreKey.getSignature(), bobIdentityKey.getPublicKey()); 173 | SessionBuilder aliceSessionBuilder = new SessionBuilder(aliceStore, new SignalProtocolAddress("+14152222222", 1)); 174 | aliceSessionBuilder.process(bobBundle); 175 | 176 | bobStore.storeSignedPreKey(2, bobSignedPreKey); 177 | bobStore.storePreKey(1, new PreKeyRecord(1, bobPreKey)); 178 | 179 | } 180 | } 181 | -------------------------------------------------------------------------------- /tests/src/test/java/org/signal/libsignal/metadata/SessionCipherTest.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | import junit.framework.TestCase; 5 | 6 | import org.whispersystems.libsignal.DuplicateMessageException; 7 | import org.whispersystems.libsignal.IdentityKey; 8 | import org.whispersystems.libsignal.IdentityKeyPair; 9 | import org.whispersystems.libsignal.InvalidKeyException; 10 | import org.whispersystems.libsignal.InvalidMessageException; 11 | import org.whispersystems.libsignal.LegacyMessageException; 12 | import org.whispersystems.libsignal.NoSessionException; 13 | import org.whispersystems.libsignal.SessionCipher; 14 | import org.whispersystems.libsignal.SignalProtocolAddress; 15 | import org.whispersystems.libsignal.UntrustedIdentityException; 16 | import org.whispersystems.libsignal.ecc.Curve; 17 | import org.whispersystems.libsignal.ecc.ECKeyPair; 18 | import org.whispersystems.libsignal.ecc.ECPublicKey; 19 | import org.whispersystems.libsignal.protocol.CiphertextMessage; 20 | import org.whispersystems.libsignal.protocol.SignalMessage; 21 | import org.whispersystems.libsignal.ratchet.AliceSignalProtocolParameters; 22 | import org.whispersystems.libsignal.ratchet.BobSignalProtocolParameters; 23 | import org.whispersystems.libsignal.ratchet.RatchetingSession; 24 | import org.whispersystems.libsignal.state.SessionRecord; 25 | import org.whispersystems.libsignal.state.SessionState; 26 | import org.whispersystems.libsignal.state.SignalProtocolStore; 27 | import org.whispersystems.libsignal.util.guava.Optional; 28 | 29 | import java.security.NoSuchAlgorithmException; 30 | import java.util.ArrayList; 31 | import java.util.Arrays; 32 | import java.util.Collections; 33 | import java.util.LinkedList; 34 | import java.util.List; 35 | import java.util.Random; 36 | 37 | public class SessionCipherTest extends TestCase { 38 | 39 | public void testBasicSessionV3() 40 | throws InvalidKeyException, DuplicateMessageException, 41 | LegacyMessageException, InvalidMessageException, NoSuchAlgorithmException, NoSessionException, UntrustedIdentityException 42 | { 43 | SessionRecord aliceSessionRecord = new SessionRecord(); 44 | SessionRecord bobSessionRecord = new SessionRecord(); 45 | 46 | initializeSessionsV3(aliceSessionRecord.getSessionState(), bobSessionRecord.getSessionState()); 47 | runInteraction(aliceSessionRecord, bobSessionRecord); 48 | } 49 | 50 | public void testMessageKeyLimits() throws Exception { 51 | SessionRecord aliceSessionRecord = new SessionRecord(); 52 | SessionRecord bobSessionRecord = new SessionRecord(); 53 | 54 | initializeSessionsV3(aliceSessionRecord.getSessionState(), bobSessionRecord.getSessionState()); 55 | 56 | SignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore(); 57 | SignalProtocolStore bobStore = new TestInMemorySignalProtocolStore(); 58 | 59 | aliceStore.storeSession(new SignalProtocolAddress("+14159999999", 1), aliceSessionRecord); 60 | bobStore.storeSession(new SignalProtocolAddress("+14158888888", 1), bobSessionRecord); 61 | 62 | SessionCipher aliceCipher = new SessionCipher(aliceStore, new SignalProtocolAddress("+14159999999", 1)); 63 | SessionCipher bobCipher = new SessionCipher(bobStore, new SignalProtocolAddress("+14158888888", 1)); 64 | 65 | List inflight = new LinkedList<>(); 66 | 67 | for (int i=0;i<2010;i++) { 68 | inflight.add(aliceCipher.encrypt("you've never been so hungry, you've never been so cold".getBytes())); 69 | } 70 | 71 | bobCipher.decrypt(new SignalMessage(inflight.get(1000).serialize())); 72 | bobCipher.decrypt(new SignalMessage(inflight.get(inflight.size()-1).serialize())); 73 | 74 | try { 75 | bobCipher.decrypt(new SignalMessage(inflight.get(0).serialize())); 76 | throw new AssertionError("Should have failed!"); 77 | } catch (DuplicateMessageException dme) { 78 | // good 79 | } 80 | } 81 | 82 | private void runInteraction(SessionRecord aliceSessionRecord, SessionRecord bobSessionRecord) 83 | throws DuplicateMessageException, LegacyMessageException, InvalidMessageException, NoSuchAlgorithmException, NoSessionException, UntrustedIdentityException { 84 | SignalProtocolStore aliceStore = new TestInMemorySignalProtocolStore(); 85 | SignalProtocolStore bobStore = new TestInMemorySignalProtocolStore(); 86 | 87 | aliceStore.storeSession(new SignalProtocolAddress("+14159999999", 1), aliceSessionRecord); 88 | bobStore.storeSession(new SignalProtocolAddress("+14158888888", 1), bobSessionRecord); 89 | 90 | SessionCipher aliceCipher = new SessionCipher(aliceStore, new SignalProtocolAddress("+14159999999", 1)); 91 | SessionCipher bobCipher = new SessionCipher(bobStore, new SignalProtocolAddress("+14158888888", 1)); 92 | 93 | byte[] alicePlaintext = "This is a plaintext message.".getBytes(); 94 | CiphertextMessage message = aliceCipher.encrypt(alicePlaintext); 95 | byte[] bobPlaintext = bobCipher.decrypt(new SignalMessage(message.serialize())); 96 | 97 | assertTrue(Arrays.equals(alicePlaintext, bobPlaintext)); 98 | 99 | byte[] bobReply = "This is a message from Bob.".getBytes(); 100 | CiphertextMessage reply = bobCipher.encrypt(bobReply); 101 | byte[] receivedReply = aliceCipher.decrypt(new SignalMessage(reply.serialize())); 102 | 103 | assertTrue(Arrays.equals(bobReply, receivedReply)); 104 | 105 | List aliceCiphertextMessages = new ArrayList<>(); 106 | List alicePlaintextMessages = new ArrayList<>(); 107 | 108 | for (int i=0;i<50;i++) { 109 | alicePlaintextMessages.add(("смерть за смерть " + i).getBytes()); 110 | aliceCiphertextMessages.add(aliceCipher.encrypt(("смерть за смерть " + i).getBytes())); 111 | } 112 | 113 | long seed = System.currentTimeMillis(); 114 | 115 | Collections.shuffle(aliceCiphertextMessages, new Random(seed)); 116 | Collections.shuffle(alicePlaintextMessages, new Random(seed)); 117 | 118 | for (int i=0;i bobCiphertextMessages = new ArrayList<>(); 124 | List bobPlaintextMessages = new ArrayList<>(); 125 | 126 | for (int i=0;i<20;i++) { 127 | bobPlaintextMessages.add(("смерть за смерть " + i).getBytes()); 128 | bobCiphertextMessages.add(bobCipher.encrypt(("смерть за смерть " + i).getBytes())); 129 | } 130 | 131 | seed = System.currentTimeMillis(); 132 | 133 | Collections.shuffle(bobCiphertextMessages, new Random(seed)); 134 | Collections.shuffle(bobPlaintextMessages, new Random(seed)); 135 | 136 | for (int i=0;iabsent()) 175 | .setTheirRatchetKey(bobEphemeralKey.getPublicKey()) 176 | .setTheirSignedPreKey(bobBaseKey.getPublicKey()) 177 | .setTheirIdentityKey(bobIdentityKey.getPublicKey()) 178 | .create(); 179 | 180 | BobSignalProtocolParameters bobParameters = BobSignalProtocolParameters.newBuilder() 181 | .setOurRatchetKey(bobEphemeralKey) 182 | .setOurSignedPreKey(bobBaseKey) 183 | .setOurOneTimePreKey(Optional.absent()) 184 | .setOurIdentityKey(bobIdentityKey) 185 | .setTheirIdentityKey(aliceIdentityKey.getPublicKey()) 186 | .setTheirBaseKey(aliceBaseKey.getPublicKey()) 187 | .create(); 188 | 189 | RatchetingSession.initializeSession(aliceSessionState, aliceParameters); 190 | RatchetingSession.initializeSession(bobSessionState, bobParameters); 191 | } 192 | 193 | } 194 | -------------------------------------------------------------------------------- /tests/src/test/java/org/signal/libsignal/metadata/TestInMemorySignalProtocolStore.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata; 2 | 3 | 4 | import org.whispersystems.libsignal.IdentityKey; 5 | import org.whispersystems.libsignal.IdentityKeyPair; 6 | import org.whispersystems.libsignal.ecc.Curve; 7 | import org.whispersystems.libsignal.ecc.ECKeyPair; 8 | import org.whispersystems.libsignal.state.SignedPreKeyRecord; 9 | import org.whispersystems.libsignal.state.impl.InMemorySignalProtocolStore; 10 | import org.whispersystems.libsignal.util.KeyHelper; 11 | 12 | public class TestInMemorySignalProtocolStore extends InMemorySignalProtocolStore { 13 | public TestInMemorySignalProtocolStore() { 14 | super(generateIdentityKeyPair(), generateRegistrationId()); 15 | } 16 | 17 | private static IdentityKeyPair generateIdentityKeyPair() { 18 | ECKeyPair identityKeyPairKeys = Curve.generateKeyPair(); 19 | 20 | return new IdentityKeyPair(new IdentityKey(identityKeyPairKeys.getPublicKey()), 21 | identityKeyPairKeys.getPrivateKey()); 22 | } 23 | 24 | private static int generateRegistrationId() { 25 | return KeyHelper.generateRegistrationId(false); 26 | } 27 | } -------------------------------------------------------------------------------- /tests/src/test/java/org/signal/libsignal/metadata/certificate/SenderCertificateTest.java: -------------------------------------------------------------------------------- 1 | package org.signal.libsignal.metadata.certificate; 2 | 3 | 4 | import com.google.protobuf.ByteString; 5 | 6 | import junit.framework.TestCase; 7 | 8 | import org.signal.libsignal.metadata.SignalProtos; 9 | import org.whispersystems.libsignal.InvalidKeyException; 10 | import org.whispersystems.libsignal.ecc.Curve; 11 | import org.whispersystems.libsignal.ecc.ECKeyPair; 12 | 13 | public class SenderCertificateTest extends TestCase { 14 | 15 | private final ECKeyPair trustRoot = Curve.generateKeyPair(); 16 | 17 | public void testSignature() throws InvalidCertificateException, InvalidKeyException { 18 | ECKeyPair serverKey = Curve.generateKeyPair(); 19 | ECKeyPair key = Curve.generateKeyPair(); 20 | 21 | byte[] certificateBytes = SignalProtos.SenderCertificate.Certificate.newBuilder() 22 | .setSenderUuid("9d0652a3-dcc3-4d11-975f-74d61598733f") 23 | .setSenderE164("+14152222222") 24 | .setSenderDevice(1) 25 | .setExpires(31337) 26 | .setIdentityKey(ByteString.copyFrom(key.getPublicKey().serialize())) 27 | .setSigner(getServerCertificate(serverKey)) 28 | .build() 29 | .toByteArray(); 30 | 31 | byte[] certificateSignature = Curve.calculateSignature(serverKey.getPrivateKey(), certificateBytes); 32 | 33 | SenderCertificate senderCertificate = new SenderCertificate(SignalProtos.SenderCertificate.newBuilder() 34 | .setCertificate(ByteString.copyFrom(certificateBytes)) 35 | .setSignature(ByteString.copyFrom(certificateSignature)) 36 | .build() 37 | .toByteArray()); 38 | 39 | new CertificateValidator(trustRoot.getPublicKey()).validate(senderCertificate, 31336); 40 | } 41 | 42 | public void testExpiredSignature() throws InvalidCertificateException, InvalidKeyException { 43 | ECKeyPair serverKey = Curve.generateKeyPair(); 44 | ECKeyPair key = Curve.generateKeyPair(); 45 | 46 | byte[] certificateBytes = SignalProtos.SenderCertificate.Certificate.newBuilder() 47 | .setSenderUuid("9d0652a3-dcc3-4d11-975f-74d61598733f") 48 | .setSenderE164("+14152222222") 49 | .setSenderDevice(1) 50 | .setExpires(31337) 51 | .setIdentityKey(ByteString.copyFrom(key.getPublicKey().serialize())) 52 | .setSigner(getServerCertificate(serverKey)) 53 | .build() 54 | .toByteArray(); 55 | 56 | byte[] certificateSignature = Curve.calculateSignature(serverKey.getPrivateKey(), certificateBytes); 57 | 58 | SenderCertificate senderCertificate = new SenderCertificate(SignalProtos.SenderCertificate.newBuilder() 59 | .setCertificate(ByteString.copyFrom(certificateBytes)) 60 | .setSignature(ByteString.copyFrom(certificateSignature)) 61 | .build() 62 | .toByteArray()); 63 | 64 | try { 65 | new CertificateValidator(trustRoot.getPublicKey()).validate(senderCertificate, 31338); 66 | throw new AssertionError(); 67 | } catch (InvalidCertificateException e) { 68 | // good 69 | } 70 | } 71 | 72 | public void testBadSignature() throws InvalidCertificateException, InvalidKeyException { 73 | ECKeyPair serverKey = Curve.generateKeyPair(); 74 | ECKeyPair key = Curve.generateKeyPair(); 75 | 76 | byte[] certificateBytes = SignalProtos.SenderCertificate.Certificate.newBuilder() 77 | .setSenderUuid("9d0652a3-dcc3-4d11-975f-74d61598733f") 78 | .setSenderE164("+14152222222") 79 | .setSenderDevice(1) 80 | .setExpires(31337) 81 | .setIdentityKey(ByteString.copyFrom(key.getPublicKey().serialize())) 82 | .setSigner(getServerCertificate(serverKey)) 83 | .build() 84 | .toByteArray(); 85 | 86 | byte[] certificateSignature = Curve.calculateSignature(serverKey.getPrivateKey(), certificateBytes); 87 | 88 | for (int i=0;i