| crypto/hmac | Package hmac implements the Keyed-Hash Message Authentication Code (HMAC) as defined in U.S. Federal Information Processing Standards Publication 198. |
| crypto/sha256 | Package sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4. |
| encoding/base64 | Package base64 implements base64 encoding as specified by RFC 4648. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| go.mau.fi/libsignal/cipher | CBC describes a block cipher mode. |
| go.mau.fi/libsignal/ecc | Package ecc provides a way to generate, sign, and use Elliptic-Curve X25519 Cryptography keys. |
| go.mau.fi/libsignal/kdf | Package kdf provides a key derivation function to calculate key output and negotiate shared secrets for curve X25519 keys. |
| go.mau.fi/libsignal/keys/root | Package root provides root keys which are used to derive new chain and root keys in a ratcheting session. |
| go.mau.fi/libsignal/util/bytehelper | |