1 files changed, 67 insertions, 0 deletions
diff --git a/vendor/github.com/pion/srtp/v2/protection_profile.go b/vendor/github.com/pion/srtp/v2/protection_profile.go
new file mode 100644
index 0000000..94476ad
--- /dev/null
+++ b/vendor/github.com/pion/srtp/v2/protection_profile.go
@@ -0,0 +1,67 @@
+package srtp
+
+import "fmt"
+
+// ProtectionProfile specifies Cipher and AuthTag details, similar to TLS cipher suite
+type ProtectionProfile uint16
+
+// Supported protection profiles
+const (
+	ProtectionProfileAes128CmHmacSha1_80 ProtectionProfile = 0x0001
+	ProtectionProfileAeadAes128Gcm       ProtectionProfile = 0x0007
+)
+
+func (p ProtectionProfile) keyLen() (int, error) {
+	switch p {
+	case ProtectionProfileAes128CmHmacSha1_80:
+		fallthrough
+	case ProtectionProfileAeadAes128Gcm:
+		return 16, nil
+	default:
+		return 0, fmt.Errorf("%w: %#v", errNoSuchSRTPProfile, p)
+	}
+}
+
+func (p ProtectionProfile) saltLen() (int, error) {
+	switch p {
+	case ProtectionProfileAes128CmHmacSha1_80:
+		return 14, nil
+	case ProtectionProfileAeadAes128Gcm:
+		return 12, nil
+	default:
+		return 0, fmt.Errorf("%w: %#v", errNoSuchSRTPProfile, p)
+	}
+}
+
+func (p ProtectionProfile) authTagLen() (int, error) {
+	switch p {
+	case ProtectionProfileAes128CmHmacSha1_80:
+		return (&srtpCipherAesCmHmacSha1{}).authTagLen(), nil
+	case ProtectionProfileAeadAes128Gcm:
+		return (&srtpCipherAeadAesGcm{}).authTagLen(), nil
+	default:
+		return 0, fmt.Errorf("%w: %#v", errNoSuchSRTPProfile, p)
+	}
+}
+
+func (p ProtectionProfile) aeadAuthTagLen() (int, error) {
+	switch p {
+	case ProtectionProfileAes128CmHmacSha1_80:
+		return (&srtpCipherAesCmHmacSha1{}).aeadAuthTagLen(), nil
+	case ProtectionProfileAeadAes128Gcm:
+		return (&srtpCipherAeadAesGcm{}).aeadAuthTagLen(), nil
+	default:
+		return 0, fmt.Errorf("%w: %#v", errNoSuchSRTPProfile, p)
+	}
+}
+
+func (p ProtectionProfile) authKeyLen() (int, error) {
+	switch p {
+	case ProtectionProfileAes128CmHmacSha1_80:
+		return 20, nil
+	case ProtectionProfileAeadAes128Gcm:
+		return 0, nil
+	default:
+		return 0, fmt.Errorf("%w: %#v", errNoSuchSRTPProfile, p)
+	}
+}