Cryptography

Constant-time Ed25519 digital signatures and X25519 ECDH key agreement backed by libsodium guarded memory

JSON Object Signing and Encryption (JOSE) — JWS, JWE, JWT, and JWKS backed by OpenSSL

Native TPM 2.0 Software Stack with NV persistence, FIDO2 P-256 credentials, and KDFa parameter encryption

Crystal implementation of ChaCha20, Poly1305 authenticator, and AEAD mode (RFC 8439) aead chacha20 poly1305 rfc8439

Constant-time Post-Quantum Cryptography (NIST FIPS 203 ML-KEM and FIPS 204 ML-DSA) backed by OpenSSL 3.5+ and libsodium guarded memory

Elliptic curve used in the public-private-key cryptography native-library secp256k1 bitcoin ethereum ec ecdh ecdsa ethereum-addresses bitcoin-addresses compressed checksum byte

Crystal wrapper for the libsodium crypto API cryptography nacl libsodium blake2b salsa20 chacha20 argon2 digest libsodium-bindings

Encrypt and decrypt files in the Ansible Vault format ansible vault-password vault ansible-vault cryptography

Crystal bindings for OpenSSL RSA rsa openssl

Bindings for Colin Percival's scrypt key derivation function scrypt shard crypto password

Pure Crystal implementation of the ROT26 encryption algorithm

bindings for argon2 hashing library argon2 sushichain hashing-algorithm

Crystal wrapper for the libsodium crypto API cryptography public-key-cryptography sodium libsodium

C bindings for OpenSSL ECDSA

An SHA-3 implementation written in Crystal sha3 keccak

a native library implementing BIP-0039 mnemonics bip39 bitcoin shard mnemonic

Crystal bindings for OpenSSL RSA

Implementation of the Cipher-based Message Authentication Code (CMAC)

Several cryptographic algorithms written in pure Crystal with no external dependencies cryptography telegram aes-encryption aes-256 aes-cbc aes-ctr aes-ige

the Ed25519 elliptic curve public-key signature system

Collection of Pseudo Random Number Generators (PRNGs)