ocrypto supports the following cryptographic algorithms:
| Algorithm | Specification |
| AES (CTR, CCM, GCM, EAX, CBD, ECB) | FIPS-PUB-197, NIST SP 800-38*, EAX |
| AEAD-ChaCha20-Poly1305 | RFC8439 |
| SHA (SHA512, SHA384*, SHA256, SHA1) | FIPS-PUB-180-4 |
| HMAC (SHA512, SHA256, SHA1) | RFC2104 |
| HKDF (SHA512, SHA256, SHA1) | RFC5869 |
| PBKDF2 (SHA256, SHA1) | RFC8018 |
| AES-CMAC | RFC4493 |
| ECDH (P224, P256) ** | NIST SP 800-56A |
| ECDSA (P224, P256) ** | FIPS-PUB-186-4 |
| X25519 (aka Curve25519) | RFC7748 |
| Ed25519 | RFC8032 |
| RSA (1024- and 2048-bit keys, PKCS1 V1.5, OAEP, PSS) | RFC8017 |
| SRP-6 (SHA512, 3072-bit keys) | RFC2945 |
| EC-JPAKE (P256) |
RFC8236 |
| SRTP crypto functions *** | RFC3711 |
* SHA512 with output truncated to 384 bit.
** P224 (aka prime224v1 and secp224r1) and P256 (aka prime256v1 and secp256r1) are implemented according to RFC5903.
*** Support for SRTP default crypto algorithms (AES-CTR and HMAC-SHA1).