├── .gitignore ├── LICENSE ├── README.md ├── pass.go ├── pass.png ├── pass_test.go └── wwdr.go /.gitignore: -------------------------------------------------------------------------------- 1 | *.p12 2 | *.pem 3 | *.cer 4 | *.pass 5 | *.pkpass 6 | 7 | .DS_Store -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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The text should be enclosed in the appropriate 184 | comment syntax for the file format. We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # pkpass-go 2 | 3 | ## Summary 4 | This package will generate a signed Apple Wallet Pass given your companion files, and your Apple issued Pass Type Certificate. 5 | 6 | For instructions on how to obtain these certifcates for your account, [please see this tutorial](https://developer.apple.com/library/archive/documentation/UserExperience/Conceptual/PassKit_PG/YourFirst.html). 7 | 8 | ![example coupon](pass.png "Example Coupon") 9 | 10 | Currently, we depend on [openssl](https://www.openssl.org/). When running in production, I recommend installing this in your Docker container. 11 | 12 | ## Usage 13 | ```go 14 | // Open your certifcate via a file, string reader, etc. 15 | cert, err := os.Open("Certificates.p12") 16 | if err != nil { 17 | panic(err) 18 | } 19 | defer cert.Close() 20 | 21 | // Pass the directory containing your companiion files, the password you need 22 | // to open your certificate, and the actual certificate to the New func. 23 | r, err := pkpass.New("Coupon.pass", "", cert) 24 | if err != nil { 25 | panic(err) 26 | } 27 | 28 | // The reader contains your freshly minted .pkpass file, just write it out so you can 29 | // use it. 30 | f, err := os.Create("Coupon.pkpass") 31 | if err != nil { 32 | t.Fatal(err) 33 | } 34 | defer f.Close() 35 | 36 | // Copy the reader into an actual file so that you can open it. 37 | _, err = io.Copy(f, r) 38 | if err != nil { 39 | panic(err) 40 | } 41 | ``` 42 | 43 | ## Certificates 44 | When you log into your Apple Developer account, you should create a _Pass Type ID_. This type id will be what goes into your pass.json file, and will be what the certificate will be attached to. You should name this using the reverse domain convention. 45 | 46 | ``` 47 | pass.com.example.mypass 48 | ``` 49 | 50 | Once you have created a _Pass Type ID_, click edit. Follow the instructions to create and download your certificate. Likely, your certificate will be placced into _Keychain Access_ from there, you can export it, and use it with this package. 51 | 52 | It is important that you update your `pass.json` file prior to creating the pass. You will need to substitute the `passTypeIdentifier` and `teamIdentifier` for their actual values. 53 | 54 | ## License 55 | _Copyright © 2018 Trevor Hutto_ 56 | 57 | _Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with the License. You may obtain a copy of the License in the LICENSE file, or at:_ 58 | 59 | http://www.apache.org/licenses/LICENSE-2.0 60 | 61 | _Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License._ 62 | -------------------------------------------------------------------------------- /pass.go: -------------------------------------------------------------------------------- 1 | package pkpass 2 | 3 | import ( 4 | "archive/zip" 5 | "bytes" 6 | "crypto/sha1" 7 | "encoding/json" 8 | "fmt" 9 | "io" 10 | "io/ioutil" 11 | "os" 12 | "os/exec" 13 | "path/filepath" 14 | ) 15 | 16 | // New will create a new Apple pass given the directory of companion files, the 17 | // password needed to open the certificate, and the certificate. You should read 18 | // the returned reader into a file, this file is your Apple pass and can be opened 19 | // from iOS and macOS devices. 20 | func New(passDir, password string, cert io.Reader) (io.Reader, error) { 21 | // Create a temporary directory that we will use as a scratch pad for our 22 | // openssl commands. 23 | tempDir, err := ioutil.TempDir("", "") 24 | if err != nil { 25 | return nil, err 26 | } 27 | defer os.RemoveAll(tempDir) 28 | 29 | // Copy the certificate into a file so that it can be used by 30 | // os.Exec 31 | c, err := os.Create(fmt.Sprintf("%s/certificates.p12", tempDir)) 32 | if err != nil { 33 | return nil, err 34 | } 35 | defer c.Close() 36 | 37 | _, err = io.Copy(c, cert) 38 | if err != nil { 39 | return nil, err 40 | } 41 | 42 | // Create the certificate.pem file 43 | err = pem(tempDir, password, cert) 44 | if err != nil { 45 | return nil, err 46 | } 47 | 48 | // Create the key.pem file 49 | err = key(tempDir, password, cert) 50 | if err != nil { 51 | return nil, err 52 | } 53 | 54 | // Create a new zip buffer that we will use to produce 55 | // the final output 56 | buf := new(bytes.Buffer) 57 | w := zip.NewWriter(buf) 58 | defer w.Close() 59 | 60 | // Create the bundle of files, this will include everything 61 | // in the directory 62 | err = bundle(w, passDir, tempDir) 63 | if err != nil { 64 | return nil, err 65 | } 66 | 67 | // Sign the manifest.json 68 | err = sign(w, tempDir, password) 69 | if err != nil { 70 | return nil, err 71 | } 72 | 73 | return buf, nil 74 | } 75 | 76 | // key will generate the private key that is needed in the openssl smime command 77 | func key(tempDir, password string, cert io.Reader) error { 78 | cmd := exec.Command( 79 | "openssl", 80 | "pkcs12", 81 | "-in", 82 | fmt.Sprintf("%s/certificates.p12", tempDir), 83 | "-nocerts", 84 | "-out", 85 | fmt.Sprintf("%s/key.pem", tempDir), 86 | "-passin", 87 | fmt.Sprintf("pass:%s", password), 88 | "-passout", 89 | fmt.Sprintf("pass:%s1234", password), 90 | ) 91 | return cmd.Run() 92 | } 93 | 94 | // key will generate the certificate's pem file that is needed in the openssl smime command 95 | func pem(tempDir, password string, cert io.Reader) error { 96 | cmd := exec.Command( 97 | "openssl", 98 | "pkcs12", 99 | "-in", 100 | fmt.Sprintf("%s/certificates.p12", tempDir), 101 | "-clcerts", 102 | "-nokeys", 103 | "-out", 104 | fmt.Sprintf("%s/certificate.pem", tempDir), 105 | "-passin", 106 | fmt.Sprintf("pass:%s", password), 107 | ) 108 | return cmd.Run() 109 | } 110 | 111 | // bundle will read all of the files in the passDir, create a manifest.json, and 112 | // add all files to the zip archive. 113 | func bundle(w *zip.Writer, passDir, tempDir string) error { 114 | files, err := ioutil.ReadDir(passDir) 115 | if err != nil { 116 | return err 117 | } 118 | 119 | var m = make(map[string]string) 120 | for _, fi := range files { 121 | // Skip directories, they are meaningless in this situation 122 | if fi.IsDir() { 123 | continue 124 | } 125 | 126 | // Open the file in the directory 127 | f, err := os.Open(filepath.Join(passDir, fi.Name())) 128 | if err != nil { 129 | return err 130 | } 131 | 132 | // Create the sha writer 133 | hw := sha1.New() 134 | 135 | // Create the zip writer 136 | zw, err := w.Create(fi.Name()) 137 | if err != nil { 138 | return err 139 | } 140 | 141 | mw := io.MultiWriter(hw, zw) 142 | 143 | // Write the file to the zip writer 144 | _, err = io.Copy(mw, f) 145 | if err != nil { 146 | return err 147 | } 148 | 149 | // Add the hash to a map, later we will json.Marshal this to make manifest.json 150 | sha := hw.Sum(nil) 151 | m[fi.Name()] = fmt.Sprintf("%x", sha) 152 | } 153 | 154 | // Create the file writer 155 | f, err := os.Create(filepath.Join(tempDir, "manifest.json")) 156 | if err != nil { 157 | return err 158 | } 159 | defer f.Close() 160 | 161 | // Create the zip writer 162 | zw, err := w.Create("manifest.json") 163 | if err != nil { 164 | return err 165 | } 166 | 167 | mw := io.MultiWriter(f, zw) 168 | 169 | // Write the JSON to the file, and zip 170 | err = json.NewEncoder(mw).Encode(m) 171 | if err != nil { 172 | return err 173 | } 174 | 175 | return nil 176 | } 177 | 178 | // sign will sign the manifest json using the keys and certificates created 179 | // in key and pem respectively. It will then write the signature file to the zip 180 | // archive so that we can open the pass. 181 | func sign(w *zip.Writer, tempDir, password string) error { 182 | // Copy the wwdr certificate into a file so that it can be used 183 | // by openssl 184 | f, err := os.Create(fmt.Sprintf("%s/wwdr.pem", tempDir)) 185 | if err != nil { 186 | return err 187 | } 188 | defer f.Close() 189 | _, err = f.Write([]byte(wwdr)) 190 | if err != nil { 191 | return err 192 | } 193 | 194 | // Sign the bundle 195 | cmd := exec.Command( 196 | "openssl", 197 | "smime", 198 | "-sign", 199 | "-signer", 200 | fmt.Sprintf("%s/certificate.pem", tempDir), 201 | "-inkey", 202 | fmt.Sprintf("%s/key.pem", tempDir), 203 | "-certfile", 204 | fmt.Sprintf("%s/wwdr.pem", tempDir), 205 | "-in", 206 | fmt.Sprintf("%s/manifest.json", tempDir), 207 | "-out", 208 | fmt.Sprintf("%s/signature", tempDir), 209 | "-outform", 210 | "der", 211 | "-binary", 212 | "-passin", 213 | fmt.Sprintf("pass:%s1234", password), 214 | ) 215 | cmd.Stderr = os.Stderr 216 | err = cmd.Run() 217 | if err != nil { 218 | return err 219 | } 220 | 221 | sig, err := os.Open(fmt.Sprintf("%s/signature", tempDir)) 222 | if err != nil { 223 | return err 224 | } 225 | defer f.Close() 226 | 227 | zw, err := w.Create("signature") 228 | if err != nil { 229 | return err 230 | } 231 | 232 | _, err = io.Copy(zw, sig) 233 | if err != nil { 234 | return err 235 | } 236 | 237 | return nil 238 | } 239 | -------------------------------------------------------------------------------- /pass.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/huttotw/pkpass-go/b03efc77edfc368fd5a726a74d70e477b49582ae/pass.png -------------------------------------------------------------------------------- /pass_test.go: -------------------------------------------------------------------------------- 1 | package pkpass_test 2 | 3 | import ( 4 | "io" 5 | "os" 6 | "testing" 7 | 8 | "github.com/huttotw/pkpass-go" 9 | ) 10 | 11 | func TestNew(t *testing.T) { 12 | cert, err := os.Open("Certificates.p12") 13 | if err != nil { 14 | t.Fatal(err) 15 | } 16 | defer cert.Close() 17 | 18 | r, err := pkpass.New("Coupon.pass", "", cert) 19 | if err != nil { 20 | t.Fatal(err) 21 | } 22 | 23 | f, err := os.Create("Coupon.pkpass") 24 | if err != nil { 25 | t.Fatal(err) 26 | } 27 | defer f.Close() 28 | 29 | _, err = io.Copy(f, r) 30 | } 31 | -------------------------------------------------------------------------------- /wwdr.go: -------------------------------------------------------------------------------- 1 | package pkpass 2 | 3 | var wwdr = ` 4 | -----BEGIN CERTIFICATE----- 5 | MIIEIjCCAwqgAwIBAgIIAd68xDltoBAwDQYJKoZIhvcNAQEFBQAwYjELMAkGA1UE 6 | BhMCVVMxEzARBgNVBAoTCkFwcGxlIEluYy4xJjAkBgNVBAsTHUFwcGxlIENlcnRp 7 | ZmljYXRpb24gQXV0aG9yaXR5MRYwFAYDVQQDEw1BcHBsZSBSb290IENBMB4XDTEz 8 | MDIwNzIxNDg0N1oXDTIzMDIwNzIxNDg0N1owgZYxCzAJBgNVBAYTAlVTMRMwEQYD 9 | VQQKDApBcHBsZSBJbmMuMSwwKgYDVQQLDCNBcHBsZSBXb3JsZHdpZGUgRGV2ZWxv 10 | cGVyIFJlbGF0aW9uczFEMEIGA1UEAww7QXBwbGUgV29ybGR3aWRlIERldmVsb3Bl 11 | ciBSZWxhdGlvbnMgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwggEiMA0GCSqGSIb3 12 | DQEBAQUAA4IBDwAwggEKAoIBAQDKOFSmy1aqyCQ5SOmM7uxfuH8mkbw0U3rOfGOA 13 | YXdkXqUHI7Y5/lAtFVZYcC1+xG7BSoU+L/DehBqhV8mvexj/avoVEkkVCBmsqtsq 14 | Mu2WY2hSFT2Miuy/axiV4AOsAX2XBWfODoWVN2rtCbauZ81RZJ/GXNG8V25nNYB2 15 | NqSHgW44j9grFU57Jdhav06DwY3Sk9UacbVgnJ0zTlX5ElgMhrgWDcHld0WNUEi6 16 | Ky3klIXh6MSdxmilsKP8Z35wugJZS3dCkTm59c3hTO/AO0iMpuUhXf1qarunFjVg 17 | 0uat80YpyejDi+l5wGphZxWy8P3laLxiX27Pmd3vG2P+kmWrAgMBAAGjgaYwgaMw 18 | HQYDVR0OBBYEFIgnFwmpthhgi+zruvZHWcVSVKO3MA8GA1UdEwEB/wQFMAMBAf8w 19 | HwYDVR0jBBgwFoAUK9BpR5R2Cf70a40uQKb3R01/CF4wLgYDVR0fBCcwJTAjoCGg 20 | H4YdaHR0cDovL2NybC5hcHBsZS5jb20vcm9vdC5jcmwwDgYDVR0PAQH/BAQDAgGG 21 | MBAGCiqGSIb3Y2QGAgEEAgUAMA0GCSqGSIb3DQEBBQUAA4IBAQBPz+9Zviz1smwv 22 | j+4ThzLoBTWobot9yWkMudkXvHcs1Gfi/ZptOllc34MBvbKuKmFysa/Nw0Uwj6OD 23 | Dc4dR7Txk4qjdJukw5hyhzs+r0ULklS5MruQGFNrCk4QttkdUGwhgAqJTleMa1s8 24 | Pab93vcNIx0LSiaHP7qRkkykGRIZbVf1eliHe2iK5IaMSuviSRSqpd1VAKmuu0sw 25 | ruGgsbwpgOYJd+W+NKIByn/c4grmO7i77LpilfMFY0GCzQ87HUyVpNur+cmV6U/k 26 | TecmmYHpvPm0KdIBembhLoz2IYrF+Hjhga6/05Cdqa3zr/04GpZnMBxRpVzscYqC 27 | tGwPDBUf 28 | -----END CERTIFICATE----- 29 | ` 30 | --------------------------------------------------------------------------------