# trezor-crypto

Heavily optimized cryptography algorithms for embedded devices.

These include:
- AES/Rijndael encryption/decryption
- Big Number (256 bit) Arithmetics
- BIP32 Hierarchical Deterministic Wallets
- BIP39 Mnemonic code
- ECDSA signing/verifying (supports secp256k1 and nist256p1 curves,
  uses RFC6979 for deterministic signatures)
- ECDSA public key derivation
- BIP340 Schnorr signature signing/verifying
- Base32 (RFC4648 and custom alphabets)
- Base58 address representation
- Ed25519 signing/verifying (also SHA3 and Keccak variants)
- ECDH using secp256k1, nist256p1 and Curve25519
- HMAC-SHA256 and HMAC-SHA512
- PBKDF2
- RIPEMD-160
- SHA1
- SHA2-256/SHA2-512
- SHA3/Keccak
- BLAKE2s/BLAKE2b
- Chacha20-Poly1305
- unit tests (using Check - check.sf.net; in test_check.c)
- tests against OpenSSL (in test_openssl.c)
- integrated Wycheproof tests

Distibuted under MIT License.

## Some parts of the library come from external sources:

- AES: https://github.com/BrianGladman/aes
- Base58: https://github.com/luke-jr/libbase58
- BLAKE2s/BLAKE2b: https://github.com/BLAKE2/BLAKE2
- RIPEMD-160: https://github.com/ARMmbed/mbedtls
- SHA1/SHA2: http://www.aarongifford.com/computers/sha.html
- SHA3: https://github.com/rhash/RHash
- Curve25519: https://github.com/agl/curve25519-donna
- Ed25519: https://github.com/floodyberry/ed25519-donna
- Chacha20: https://github.com/wg/c20p1305
- Poly1305: https://github.com/floodyberry/poly1305-donna

## Repo source:

```
remote = git+ssh://git@github.com/trezor/trezor-crypto
branch = master
commit = 915b3dbbbf58c262865647728a3463b8785fc965
parent = 6ad3294f31a1e7484b43c104ff2880b965198cad
method = rebase
cmdver = 0.4.0
```