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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| package profiles | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "math/rand" | ||
|
|
||
| zkgroup "github.com/nanu-c/zkgroup" | ||
| uuidUtil "github.com/satori/go.uuid" | ||
| "github.com/signal-golang/textsecure/crypto" | ||
| "github.com/signal-golang/textsecure/transport" | ||
| ) | ||
|
|
||
| const ( | ||
| PROFILE_PATH = "/v1/profile/%s" | ||
| NAME_PADDED_LENGTH = 53 | ||
| ) | ||
|
|
||
| // Profile ... | ||
| type Profile struct { | ||
| Version string `json:"version"` | ||
| Name []byte `json:"name"` | ||
| Avatar bool `json:"avatar"` | ||
| Commitment []byte `json:"commitment"` | ||
| } | ||
|
|
||
| // GenerateProfileKey generates a new ProfileKey | ||
| func GenerateProfileKey() []byte { | ||
| profileKey := make([]byte, 32) | ||
| rand.Read(profileKey) | ||
| return profileKey | ||
| } | ||
| func uuidToByte(id string) []byte { | ||
| s, _ := uuidUtil.FromString(id) | ||
| return s.Bytes() | ||
| } | ||
|
|
||
| // UpdateProfile ... | ||
| func UpdateProfile(profileKey []byte, uuid, name string) error { | ||
| uuidByte := uuidToByte(uuid) | ||
|
|
||
| profile := Profile{} | ||
| version, err := zkgroup.ProfileKeyGetProfileKeyVersion(profileKey, uuidByte) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| commitment, err := zkgroup.ProfileKeyGetCommitment(profileKey, uuidByte) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| nameCiphertext, err := encryptName(profileKey, []byte(name), NAME_PADDED_LENGTH) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| profile.Version = string(version[:]) | ||
| profile.Commitment = commitment | ||
| profile.Name = nameCiphertext | ||
| profile.Avatar = false | ||
| writeProfile(profile) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // WriteProfile ... | ||
| func writeProfile(profile Profile) error { | ||
| // String response = makeServiceRequest(String.format(PROFILE_PATH, ""), "PUT", requestBody); | ||
| body, err := json.Marshal(profile) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| transport.Transport.PutJSON(fmt.Sprintf(PROFILE_PATH, ""), body) | ||
| return nil | ||
| } | ||
|
|
||
| func encryptName(key, input []byte, paddedLength int) ([]byte, error) { | ||
| inputLength := len(input) | ||
| if inputLength > paddedLength { | ||
| return nil, errors.New("Input too long") | ||
| } | ||
| padded := append(input, make([]byte, paddedLength-inputLength)...) | ||
| nonce := make([]byte, 12) | ||
| rand.Read(nonce) | ||
| ciphertext, err := crypto.AesgcmEncrypt(key, nonce, padded) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return append(nonce, ciphertext...), nil | ||
| } | ||
|
|
||
| func decryptName(key, nonceAndCiphertext []byte) ([]byte, error) { | ||
| if len(nonceAndCiphertext) < 12+16+1 { | ||
| return nil, errors.New("nonceAndCipher too short") | ||
| } | ||
| nonce := nonceAndCiphertext[:12] | ||
| ciphertext := nonceAndCiphertext[12:] | ||
| padded, err := crypto.AesgcmDecrypt(key, nonce, ciphertext, []byte{}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| paddedLength := len(padded) | ||
| plaintextLength := 0 | ||
| for i := paddedLength - 1; i >= 0; i-- { | ||
| if padded[i] != byte(0) { | ||
| plaintextLength = i + 1 | ||
| break | ||
| } | ||
| } | ||
| return padded[:plaintextLength], nil | ||
| } | ||
|
|
||
| func getCommitment(profileKey, uuid []byte) ([]byte, error) { | ||
| return zkgroup.ProfileKeyGetCommitment(profileKey, uuid) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| package textsecure | ||
| import ( | ||
| "testing" | ||
| "github.com/stretchr/testify/assert" | ||
| "math/rand" | ||
| ) | ||
| func TestEncryptDecrypt(t *testing.T) { | ||
| key := make([]byte, 32) | ||
| rand.Read(key) | ||
|
|
||
| name, err := encryptName(key,[]byte("Clement\ruval"), NAME_PADDED_LENGTH); | ||
| assert.Nil(t, err) | ||
| plaintext, err := decryptName(key, name); | ||
| assert.Nil(t, err) | ||
|
|
||
| assert.Equal(t, []byte("Clement\ruval"), plaintext); | ||
| } | ||
|
|
||
| func TestEmpty(t *testing.T) { | ||
| key := make([]byte, 32) | ||
| rand.Read(key) | ||
|
|
||
| name, err := encryptName(key, []byte(""), 26); | ||
| assert.Nil(t, err) | ||
| plaintext, err := decryptName(key, name); | ||
| assert.Nil(t, err) | ||
|
|
||
| assert.Equal(t, 0, len(plaintext)); | ||
| } | ||
|
|
||
| var EXPECTED_RESULT = []byte{0x5a, 0x72, 0x3a, 0xce, 0xe5, 0x2c, 0x5e, 0xa0, | ||
| 0x2b, 0x92, 0xa3, 0xa3, 0x60, 0xc0, 0x95, 0x95} | ||
| var KEY = []byte{0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, | ||
| 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, | ||
| 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02} | ||
|
|
||
| func TestKeyDerivation(t *testing.T) { | ||
| result, err := deriveAccessKeyFrom(KEY); | ||
| assert.Nil(t, err) | ||
| assert.Equal(t, EXPECTED_RESULT, result); | ||
| } |
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