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Diffstat (limited to 'src/sha3.h')
| -rw-r--r-- | src/sha3.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/sha3.h b/src/sha3.h new file mode 100644 index 0000000..adcf1e2 --- /dev/null +++ b/src/sha3.h @@ -0,0 +1,50 @@ +#ifndef SHA3_H +#define SHA3_H + +/* ------------------------------------------------------------------------- + * Works when compiled for either 32-bit or 64-bit targets, optimized for + * 64 bit. + * + * Canonical implementation of Init/Update/Finalize for SHA-3 byte input. + * + * SHA3-256, SHA3-384, SHA-512 are implemented. SHA-224 can easily be added. + * + * Based on code from http://keccak.noekeon.org/ . + * + * I place the code that I wrote into public domain, free to use. + * + * I would appreciate if you give credits to this work if you used it to + * write or test * your code. + * + * Aug 2015. Andrey Jivsov. crypto@brainhub.org + * ---------------------------------------------------------------------- */ + +/* 'Words' here refers to uint64_t */ +#define SHA3_KECCAK_SPONGE_WORDS \ + (((1600)/8/*bits to byte*/)/sizeof(uint64_t)) +typedef struct sha3_context_ { + uint64_t saved; /* the portion of the input message that we + * didn't consume yet */ + union { /* Keccak's state */ + uint64_t s[SHA3_KECCAK_SPONGE_WORDS]; + uint8_t sb[SHA3_KECCAK_SPONGE_WORDS * 8]; + }; + unsigned byteIndex; /* 0..7--the next byte after the set one + * (starts from 0; 0--none are buffered) */ + unsigned wordIndex; /* 0..24--the next word to integrate input + * (starts from 0) */ + unsigned capacityWords; /* the double size of the hash output in + * words (e.g. 16 for Keccak 512) */ +} sha3_context; + + +/* For Init or Reset call these: */ +void sha3_Init256(void *priv); +void sha3_Init384(void *priv); +void sha3_Init512(void *priv); + +void sha3_Update(void *priv, void const *bufIn, size_t len); + +void const *sha3_Finalize(void *priv); + +#endif |