├── Makefile ├── README.md ├── ssl-conn.h ├── https-svr.cc ├── ssl-svr.cc ├── ssl-cli.cc ├── server.pem ├── ssl-conn.cc └── LICENSE /Makefile: -------------------------------------------------------------------------------- 1 | include ../config.mk 2 | 3 | SOURCES=ssl-cli.cc ssl-svr.cc https-svr.cc 4 | 5 | PROGRAMS = $(SOURCES:.cc=) 6 | 7 | default: $(PROGRAMS) 8 | 9 | $(PROGRAMS): $(LIBFILE) ssl-conn.o 10 | 11 | clean: 12 | -rm -f $(PROGRAMS) 13 | -rm -f *.o 14 | 15 | .cc.o: 16 | $(CXX) $(CXXFLAGS) -c $< -o $@ 17 | 18 | .c.o: 19 | $(CC) $(CFLAGS) -c $< -o $@ 20 | 21 | .cc: 22 | $(CXX) -o $@ $< $(CXXFLAGS) ssl-conn.o $(LDFLAGS) -lssl -lcrypto 23 | 24 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | install 2 | ==== 3 | 4 | this project is part of handy. 5 | because license is different, so this project is seperated. 6 | first you install the openssl-devel. then make handy 7 | 8 | usage 9 | ==== 10 | 11 | for use of openssl server and openssl client 12 | 13 | example 14 | ==== 15 | 16 | ./ssl-svr 443 17 | 18 | ./ssl-cli 19 | 20 | 内置的openssl工具 21 | ==== 22 | 23 | ssl服务器 24 | echo abcd | openssl s_server -accept 2009 -key server.pem -cert server.pem 25 | 26 | ssl客户端 27 | openssl s_client -connect localhost:2009 28 | -------------------------------------------------------------------------------- /ssl-conn.h: -------------------------------------------------------------------------------- 1 | #pragma once 2 | #include 3 | #include 4 | #include 5 | #include 6 | 7 | namespace handy { 8 | 9 | struct SSLConn : public TcpConn { 10 | SSLConn(); 11 | ~SSLConn(); 12 | static void setSSLCertKey(const std::string& cert, const std::string& key); 13 | protected: 14 | SSL *ssl_; 15 | bool tcpConnected_; 16 | virtual int readImp(int fd, void* buf, size_t bytes); 17 | virtual int writeImp(int fd, const void* buf, size_t bytes); 18 | virtual int handleHandshake(const TcpConnPtr& con); 19 | static bool certKeyInited_; 20 | }; 21 | 22 | }; 23 | -------------------------------------------------------------------------------- /https-svr.cc: -------------------------------------------------------------------------------- 1 | #include "ssl-conn.h" 2 | 3 | using namespace handy; 4 | using namespace std; 5 | 6 | int main(int argc, const char* argv[]) { 7 | Logger::getLogger().setLogLevel(Logger::LTRACE); 8 | EventBase ebase; 9 | Signal::signal(SIGINT, [&]{ ebase.exit(); }); 10 | SSLConn::setSSLCertKey("server.pem", "server.pem"); 11 | HttpServer ss(&ebase); 12 | int r = ss.bind("0.0.0.0", 1002); 13 | exitif(r, "bind failed %d %s", errno, strerror(errno)); 14 | ss.setConnType(); 15 | ss.onGet("/hello", [](const HttpConnPtr& con) { 16 | HttpResponse resp; 17 | resp.body = Slice("hello world"); 18 | con.sendResponse(resp); 19 | }); 20 | ebase.loop(); 21 | return 0; 22 | } 23 | -------------------------------------------------------------------------------- /ssl-svr.cc: -------------------------------------------------------------------------------- 1 | #include "ssl-conn.h" 2 | 3 | using namespace handy; 4 | using namespace std; 5 | 6 | int main(int argc, const char* argv[]) { 7 | Logger::getLogger().setLogLevel(Logger::LTRACE); 8 | EventBase ebase; 9 | Signal::signal(SIGINT, [&]{ ebase.exit(); }); 10 | SSLConn::setSSLCertKey("server.pem", "server.pem"); 11 | TcpServer ss(&ebase); 12 | int r = ss.bind("0.0.0.0", 1002); 13 | exitif(r, "bind failed %d %s", errno, strerror(errno)); 14 | ss.onConnCreate([]{ return TcpConnPtr(new SSLConn); }); 15 | ss.onConnRead([](const TcpConnPtr& con) { 16 | con->send(con->getInput()); 17 | con->getInput().clear(); 18 | }); 19 | 20 | TcpServer ts(&ebase); 21 | r = ts.bind("0.0.0.0", 1003); 22 | exitif(r, "bind failed %d %s", errno, strerror(errno)); 23 | ts.onConnRead([](const TcpConnPtr& con) { 24 | con->send(con->getInput()); 25 | con->getInput().clear(); 26 | }); 27 | ebase.loop(); 28 | return 0; 29 | } 30 | -------------------------------------------------------------------------------- /ssl-cli.cc: -------------------------------------------------------------------------------- 1 | #include "ssl-conn.h" 2 | 3 | using namespace handy; 4 | using namespace std; 5 | 6 | int main(int argc, const char* argv[]) { 7 | setloglevel("TRACE"); 8 | EventBase ebase; 9 | Signal::signal(SIGINT, [&]{ ebase.exit(); }); 10 | int finished = 0; 11 | TcpConnPtr con = TcpConn::createConnection(&ebase, "www.openssl.com", 443); 12 | con->onState([&](const TcpConnPtr& con) { 13 | if (con->getState() == TcpConn::Connected) { 14 | con->send("GET / HTTP/1.1\r\nConnection: Close\r\n\r\n"); 15 | } else { 16 | finished ++; 17 | } 18 | }); 19 | con->onRead([](const TcpConnPtr& con) { 20 | Buffer& buf = con->getInput(); 21 | int len = (int)buf.size(); 22 | info("response %d bytes\n%.*s",len, len, buf.data()); 23 | buf.clear(); 24 | }); 25 | HttpConnPtr hcon = TcpConn::createConnection(&ebase, "www.openssl.com", 443); 26 | hcon->onState([&](const TcpConnPtr& con) { 27 | if (hcon->getState() == TcpConn::Connected) { 28 | hcon->send("GET / HTTP/1.1\r\nConnection: Close\r\n\r\n"); 29 | } else { 30 | finished ++; 31 | } 32 | }); 33 | hcon.onHttpMsg([](const HttpConnPtr& hcon) { 34 | Slice body = hcon.getResponse().getBody(); 35 | info("response is: %.*s", (int)body.size(), body.data()); 36 | hcon.clearData(); 37 | }); 38 | while (finished != 2 && !ebase.exited()) { 39 | ebase.loop_once(100); 40 | } 41 | return 0; 42 | } 43 | -------------------------------------------------------------------------------- /server.pem: -------------------------------------------------------------------------------- 1 | -----BEGIN PRIVATE KEY----- 2 | MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQC+Z2mi8shZ3T0c 3 | 5ItI4KwLfYFXxNr3dmIY+2DS9boD18T46Ccow3wW/15SCcI1BdD/pPBmOTpUWP0b 4 | B22l4gAOUIWfk/CAHuaD+pHAGMlolAMdscwDZPdaM3XEdu839y2gy6RL4Pxls8No 5 | sI5h2BTGl3YgjSxA+vKJE+/IXzjajfiKfGHuywPjwPpGl1juOgSaU6zqLf4MlUnq 6 | Daq7r5V9KtJh8dz46PB6c8ALGNM+dxMJSLMyDvT1/7d9aYBkBvpb3mxOu9agIDNn 7 | 2AZ3AxYwA0ykBLmc5R6V0toqRIjfruvBHqQfcjsFaoKS6O+QjtA/eBTIzGajnyis 8 | 1TfeJxURAgMBAAECggEARANIlq5GpuMCW3m/zy6CBjC0rRdiaBbff7D7qx+fbJP8 9 | hjTXGBaMEuLxXDikKLCFMWxHexxiG5MWBjunDSQnhPV6ZcBAnmNrUCWHPqkb+ME2 10 | Q7so9uVv/cZ4AM/DL6iZoeBcNcaOIf4OhSzcD1NSSIX96i7Dagq57AE1G8v30Qlb 11 | CDybxrkbW8D9TkPh57oH/VNuhGLsFp62BjleYtNqo+aknlnHCj09mFQ+N5cA8DuK 12 | 0CcNFCy4C8oZvg9kVsfdypBr4IR0kXTArqMyjUgXe9KqOzf/GdHR9anWhOzHsy/b 13 | T1Nb+vF6fDm0o6WHWhfODoF4iklrdwRibAnme+zegQKBgQDzvt4KQLnG5jWxeCLn 14 | P+QR9q63H98oL3kKToyXPaJVL+I71GtZm4yhYP8KB+bTgrMHPhR5se63cySX2lMJ 15 | RRKkieeEFuDVKVHulRH39g9fMvvl/f97qwv2mAJhdNuIaIjLSVFjQ8WZ6UWvJczp 16 | sTAyhIxDGiOV00HaUp3BFFnEOQKBgQDH+gLGIsLlPAwuMpbSyuDJucMk0Jzo3+at 17 | 6h19pu5JpfTWn71Zs0RL45x9BLwbx8oi+vjECjMiaE2OyKC6uObxpXRl5okWQ63E 18 | XBpbONB+fx2v2h1cuB7iJCJxJ6DPTL70torWtwCp+I7CcIT+J/2SqPhiKipWo0Sk 19 | R2dxeb1HmQKBgEU8mmXfLOZKzkWzEncNtwNDRy3NZ95KXd+HoHf1kf8Qsvq7xCKY 20 | BMJygv+ebvr1zVTpVXecC2sg0ewwoBWqATmr0o+6z/K84gEbZxdAVe181gDmvYOr 21 | eqJ5W3PDdfixeOoF0ZCY17B4isrNuf9HzaEL9au56RHOCI6zmQwXc8hBAoGBAMaI 22 | h0h+Kk+7FbynrOUJVbHwIrTiB2WLJFF1JGIi4F9ty21omWv8dcmB51KW6MoLx7qC 23 | v4ahObLnKlifBjNabq1pPe4MufzIpDNV3TTDavqq6KY1PQFYKhEJHsiINzaXUt1Q 24 | fPY+KQKWKeUQIHjS6wQ3jKCoi/AHl5Yg7anS2v/BAoGBAIi309nwDFJG/2UFSObA 25 | WC+V6T7qy62UlwFlBwsFCbxf9FmFQfoP6wwbQef35Wx2aDnZaSzoXKn/1jvG5e1e 26 | TFW7K9oC8JkeA//mnTAVrgkvkaHGZmd27zQYB1U3DsO3fLvEt62PZn8fyEwaczeM 27 | vOOkHciP4pIhAObg/uiO0V9I 28 | -----END PRIVATE KEY----- 29 | -----BEGIN CERTIFICATE----- 30 | MIIDXTCCAkWgAwIBAgIJAM9HYUREwVxFMA0GCSqGSIb3DQEBCwUAMEUxCzAJBgNV 31 | BAYTAkNOMRMwEQYDVQQIDApTb21lLVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBX 32 | aWRnaXRzIFB0eSBMdGQwHhcNMTQxMTAxMDY1OTE2WhcNMjQxMDI5MDY1OTE2WjBF 33 | MQswCQYDVQQGEwJDTjETMBEGA1UECAwKU29tZS1TdGF0ZTEhMB8GA1UECgwYSW50 34 | ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB 35 | CgKCAQEAvmdpovLIWd09HOSLSOCsC32BV8Ta93ZiGPtg0vW6A9fE+OgnKMN8Fv9e 36 | UgnCNQXQ/6TwZjk6VFj9GwdtpeIADlCFn5PwgB7mg/qRwBjJaJQDHbHMA2T3WjN1 37 | xHbvN/ctoMukS+D8ZbPDaLCOYdgUxpd2II0sQPryiRPvyF842o34inxh7ssD48D6 38 | RpdY7joEmlOs6i3+DJVJ6g2qu6+VfSrSYfHc+OjwenPACxjTPncTCUizMg709f+3 39 | fWmAZAb6W95sTrvWoCAzZ9gGdwMWMANMpAS5nOUeldLaKkSI367rwR6kH3I7BWqC 40 | kujvkI7QP3gUyMxmo58orNU33icVEQIDAQABo1AwTjAdBgNVHQ4EFgQUJS1vm+Z3 41 | dm8z29qqdzeI94ZmoqwwHwYDVR0jBBgwFoAUJS1vm+Z3dm8z29qqdzeI94Zmoqww 42 | DAYDVR0TBAUwAwEB/zANBgkqhkiG9w0BAQsFAAOCAQEAl/6TWgvtFCcxue+YmpLz 43 | gcPckabL2dbgC7uxbIMgFEJUjtmHRpY1Tih8pKqqbdkPWhK2IBvyCqp7L1P5A4ib 44 | FTKRGogJSaWMjnh/w644yrmsjjo5uoAueqygwha+OAC3gtt6p844hb9KJTjaoMHC 45 | caaZ6jCAnfjAp2O/3bBpgXCy69UNlWizx8aXajn5a9ah/DrY8wZfI+ESRH3oMd/f 46 | hecgZLhdTPSkUJi/l6WK9wBuI8mVl+/Gesi8zgz8u+/BRZsxQoP9tBWUjOG396fm 47 | PCpapHzlchV1N1s0k+poxmoO/GI0GTPcIY3RhU6QJIQ0dtGCLZFVWchJms5u9GBg 48 | xw== 49 | -----END CERTIFICATE----- 50 | -------------------------------------------------------------------------------- /ssl-conn.cc: -------------------------------------------------------------------------------- 1 | #include "ssl-conn.h" 2 | #include 3 | #include 4 | 5 | //#define SSL_ERROR_NONE 0 6 | //#define SSL_ERROR_SSL 1 7 | //#define SSL_ERROR_WANT_READ 2 8 | //#define SSL_ERROR_WANT_WRITE 3 9 | //#define SSL_ERROR_WANT_X509_LOOKUP 4 10 | //#define SSL_ERROR_SYSCALL 5 11 | //#define SSL_ERROR_ZERO_RETURN 6 12 | //#define SSL_ERROR_WANT_CONNECT 7 13 | //#define SSL_ERROR_WANT_ACCEPT 8 14 | 15 | using namespace std; 16 | 17 | namespace handy { 18 | 19 | namespace { 20 | static BIO* errBio; 21 | static SSL_CTX* g_sslCtx; 22 | 23 | void safeSSLInit() { 24 | static int forinit = [] { 25 | // Register the error strings for libcrypto & libssl 26 | SSL_load_error_strings (); 27 | // Register the available ciphers and digests 28 | int r = SSL_library_init (); 29 | fatalif(!r, "SSL_library_init failed"); 30 | g_sslCtx = SSL_CTX_new (SSLv23_method ()); 31 | fatalif(g_sslCtx == NULL, "SSL_CTX_new failed"); 32 | errBio = BIO_new_fd(Logger::getLogger().getFd(), BIO_NOCLOSE); 33 | static ExitCaller freeBio([]{ 34 | BIO_free(errBio); 35 | SSL_CTX_free(g_sslCtx); 36 | ERR_free_strings(); 37 | }); 38 | trace("ssl library inited"); 39 | return 0; 40 | }(); 41 | (void)forinit; 42 | } 43 | } 44 | 45 | SSLConn::SSLConn(): 46 | TcpConn(), ssl_(NULL), tcpConnected_(false) { 47 | safeSSLInit(); 48 | } 49 | 50 | SSLConn::~SSLConn() { 51 | if (ssl_) { 52 | SSL_shutdown (ssl_); 53 | SSL_free(ssl_); 54 | } 55 | } 56 | 57 | int SSLConn::handleHandshake(const TcpConnPtr& con) { 58 | fatalif(state_ != State::Handshaking, "unexpect state %d", state_); 59 | if (!tcpConnected_) { 60 | struct pollfd pfd; 61 | pfd.fd = channel_->fd(); 62 | pfd.events = POLLOUT | POLLERR; 63 | int r = poll(&pfd, 1, 0); 64 | if (r == 1 && pfd.revents == POLLOUT) { 65 | channel_->enableReadWrite(true, true); 66 | trace("tcp connected %s - %s fd %d", 67 | local_.toString().c_str(), peer_.toString().c_str(), channel_->fd()); 68 | tcpConnected_ = true; 69 | } else { 70 | trace("poll fd %d return %d revents %d", channel_->fd(), r, pfd.revents); 71 | cleanup(con); 72 | return -1; 73 | } 74 | } 75 | if (ssl_ == NULL) { 76 | ssl_ = SSL_new (g_sslCtx); 77 | fatalif(ssl_ == NULL, "SSL_new failed"); 78 | int r = SSL_set_fd(ssl_, channel_->fd()); 79 | fatalif(!r, "SSL_set_fd failed"); 80 | if (isClient()) { 81 | trace("SSL_set_connect_state for channel %ld fd %d", (long)channel_->id(), channel_->fd()); 82 | SSL_set_connect_state(ssl_); 83 | } else { 84 | trace("SSL_set_accept_state for channel %ld fd %d", (long)channel_->id(), channel_->fd()); 85 | SSL_set_accept_state(ssl_); 86 | } 87 | } 88 | int r = SSL_do_handshake(ssl_); 89 | if (r == 1) { 90 | state_ = State::Connected; 91 | trace("ssl connected %s - %s fd %d", 92 | local_.toString().c_str(), peer_.toString().c_str(), channel_->fd()); 93 | if (statecb_) { 94 | statecb_(con); 95 | } 96 | return 0; 97 | } 98 | int err = SSL_get_error(ssl_, r); 99 | if (err == SSL_ERROR_WANT_WRITE) { 100 | if (!channel_->writeEnabled()) 101 | channel_->enableWrite(true); 102 | } else if (err == SSL_ERROR_WANT_READ) { 103 | if (channel_->writeEnabled()) 104 | channel_->enableWrite(false); 105 | } else { 106 | error("SSL_do_handshake return %d error %d errno %d msg %s", r, err, errno, strerror(errno)); 107 | ERR_print_errors(errBio); 108 | cleanup(con); 109 | return -1; 110 | } 111 | return 0; 112 | } 113 | 114 | int SSLConn::readImp(int fd, void* buf, size_t bytes) { 115 | int rd = SSL_read(ssl_, buf, bytes); 116 | int ssle = SSL_get_error(ssl_, rd); 117 | if (rd < 0 && ssle != SSL_ERROR_WANT_READ) { 118 | error("SSL_read return %d error %d errno %d msg %s", rd, ssle, errno, strerror(errno)); 119 | } 120 | return rd; 121 | } 122 | 123 | int SSLConn::writeImp(int fd, const void* buf, size_t bytes) { 124 | int wd = SSL_write(ssl_, buf, bytes); 125 | int ssle = SSL_get_error(ssl_, wd); 126 | if (wd < 0 && ssle != SSL_ERROR_WANT_WRITE) { 127 | error("SSL_write return %d error %d errno %d msg %s", wd, ssle, errno, strerror(errno)); 128 | } 129 | return wd; 130 | } 131 | 132 | bool SSLConn::certKeyInited_ = false; 133 | 134 | void SSLConn::setSSLCertKey(const std::string& cert, const std::string& key) { 135 | safeSSLInit(); 136 | int r = SSL_CTX_use_certificate_file(g_sslCtx, cert.c_str(), SSL_FILETYPE_PEM); 137 | fatalif(r<=0, "SSL_CTX_use_certificate_file %s failed", cert.c_str()); 138 | r = SSL_CTX_use_PrivateKey_file(g_sslCtx, key.c_str(), SSL_FILETYPE_PEM); 139 | fatalif(r<=0, "SSL_CTX_use_PrivateKey_file %s failed", key.c_str()); 140 | r = SSL_CTX_check_private_key(g_sslCtx); 141 | fatalif(!r, "SSL_CTX_check_private_key failed"); 142 | trace("ssl cert %s key %s", cert.c_str(), key.c_str()); 143 | certKeyInited_ = true; 144 | } 145 | 146 | }; -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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Each time you redistribute the Program (or any work based on the 190 | Program), the recipient automatically receives a license from the 191 | original licensor to copy, distribute or modify the Program subject to 192 | these terms and conditions. You may not impose any further 193 | restrictions on the recipients' exercise of the rights granted herein. 194 | You are not responsible for enforcing compliance by third parties to 195 | this License. 196 | 197 | 7. If, as a consequence of a court judgment or allegation of patent 198 | infringement or for any other reason (not limited to patent issues), 199 | conditions are imposed on you (whether by court order, agreement or 200 | otherwise) that contradict the conditions of this License, they do not 201 | excuse you from the conditions of this License. If you cannot 202 | distribute so as to satisfy simultaneously your obligations under this 203 | License and any other pertinent obligations, then as a consequence you 204 | may not distribute the Program at all. For example, if a patent 205 | license would not permit royalty-free redistribution of the Program by 206 | all those who receive copies directly or indirectly through you, then 207 | the only way you could satisfy both it and this License would be to 208 | refrain entirely from distribution of the Program. 209 | 210 | If any portion of this section is held invalid or unenforceable under 211 | any particular circumstance, the balance of the section is intended to 212 | apply and the section as a whole is intended to apply in other 213 | circumstances. 214 | 215 | It is not the purpose of this section to induce you to infringe any 216 | patents or other property right claims or to contest validity of any 217 | such claims; this section has the sole purpose of protecting the 218 | integrity of the free software distribution system, which is 219 | implemented by public license practices. Many people have made 220 | generous contributions to the wide range of software distributed 221 | through that system in reliance on consistent application of that 222 | system; it is up to the author/donor to decide if he or she is willing 223 | to distribute software through any other system and a licensee cannot 224 | impose that choice. 225 | 226 | This section is intended to make thoroughly clear what is believed to 227 | be a consequence of the rest of this License. 228 | 229 | 8. If the distribution and/or use of the Program is restricted in 230 | certain countries either by patents or by copyrighted interfaces, the 231 | original copyright holder who places the Program under this License 232 | may add an explicit geographical distribution limitation excluding 233 | those countries, so that distribution is permitted only in or among 234 | countries not thus excluded. In such case, this License incorporates 235 | the limitation as if written in the body of this License. 236 | 237 | 9. The Free Software Foundation may publish revised and/or new versions 238 | of the General Public License from time to time. Such new versions will 239 | be similar in spirit to the present version, but may differ in detail to 240 | address new problems or concerns. 241 | 242 | Each version is given a distinguishing version number. If the Program 243 | specifies a version number of this License which applies to it and "any 244 | later version", you have the option of following the terms and conditions 245 | either of that version or of any later version published by the Free 246 | Software Foundation. If the Program does not specify a version number of 247 | this License, you may choose any version ever published by the Free Software 248 | Foundation. 249 | 250 | 10. If you wish to incorporate parts of the Program into other free 251 | programs whose distribution conditions are different, write to the author 252 | to ask for permission. For software which is copyrighted by the Free 253 | Software Foundation, write to the Free Software Foundation; we sometimes 254 | make exceptions for this. Our decision will be guided by the two goals 255 | of preserving the free status of all derivatives of our free software and 256 | of promoting the sharing and reuse of software generally. 257 | 258 | NO WARRANTY 259 | 260 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 261 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 262 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 263 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 264 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 265 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 266 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 267 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 268 | REPAIR OR CORRECTION. 269 | 270 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 278 | POSSIBILITY OF SUCH DAMAGES. 279 | 280 | END OF TERMS AND CONDITIONS 281 | 282 | How to Apply These Terms to Your New Programs 283 | 284 | If you develop a new program, and you want it to be of the greatest 285 | possible use to the public, the best way to achieve this is to make it 286 | free software which everyone can redistribute and change under these terms. 287 | 288 | To do so, attach the following notices to the program. It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | {description} 294 | Copyright (C) {year} {fullname} 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | {signature of Ty Coon}, 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | 341 | --------------------------------------------------------------------------------