crypto

package

v0.1.0 Latest Latest Go to latest Published: Feb 14, 2026 License: AGPL-3.0 Imports: 9 Imported by: 0

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Package crypto provides voice packet encryption and key management.

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var (
	ErrInvalidCiphertext = errors.New("crypto: invalid ciphertext")
	ErrDecryptionFailed  = errors.New("crypto: decryption failed")
)

func GenerateKey() ([]byte, error)

GenerateKey generates a random AES-128 key (16 bytes).

func GenerateToken() (string, error)

GenerateToken generates a random token string (32 bytes, hex-like).

func HashPassword(password string, salt []byte) []byte

HashPassword hashes a password using Argon2id.

func HashToken(token string) string

HashToken hashes a raw token string with SHA-256.

type VoiceCipher struct {
	// contains filtered or unexported fields
}

VoiceCipher handles AES-128-GCM encryption for voice packets.

func NewVoiceCipher(key []byte) (*VoiceCipher, error)

NewVoiceCipher creates a new voice cipher from a 16-byte AES key.

func (vc *VoiceCipher) Decrypt(sessionID uint32, seqNum uint32, header, ciphertext []byte) ([]byte, error)

Decrypt decrypts an encrypted Opus frame, verifying the header as additional data.

func (vc *VoiceCipher) Encrypt(sessionID uint32, seqNum uint32, header, opus []byte) []byte

Encrypt encrypts an Opus frame, authenticating the header as additional data. Returns ciphertext with appended auth tag.

func (vc *VoiceCipher) Overhead() int

Overhead returns the number of bytes the AEAD adds to the plaintext (GCM auth tag).