73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
#ifndef SHA3_H
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#define SHA3_H
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/* -------------------------------------------------------------------------
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* Works when compiled for either 32-bit or 64-bit targets, optimized for
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* 64 bit.
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*
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* Canonical implementation of Init/Update/Finalize for SHA-3 byte input.
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*
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* SHA3-256, SHA3-384, SHA-512 are implemented. SHA-224 can easily be added.
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*
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* Based on code from http://keccak.noekeon.org/ .
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*
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* I place the code that I wrote into public domain, free to use.
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*
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* I would appreciate if you give credits to this work if you used it to
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* write or test * your code.
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*
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* Aug 2015. Andrey Jivsov. crypto@brainhub.org
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* ---------------------------------------------------------------------- */
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/* 'Words' here refers to uint64_t */
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#define SHA3_KECCAK_SPONGE_WORDS \
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(((1600)/8/*bits to byte*/)/sizeof(uint64_t))
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typedef struct sha3_context_ {
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uint64_t saved; /* the portion of the input message that we
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* didn't consume yet */
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union { /* Keccak's state */
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uint64_t s[SHA3_KECCAK_SPONGE_WORDS];
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uint8_t sb[SHA3_KECCAK_SPONGE_WORDS * 8];
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};
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unsigned byteIndex; /* 0..7--the next byte after the set one
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* (starts from 0; 0--none are buffered) */
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unsigned wordIndex; /* 0..24--the next word to integrate input
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* (starts from 0) */
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unsigned capacityWords; /* the double size of the hash output in
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* words (e.g. 16 for Keccak 512) */
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} sha3_context;
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enum SHA3_FLAGS {
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SHA3_FLAGS_NONE=0,
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SHA3_FLAGS_KECCAK=1
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};
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enum SHA3_RETURN {
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SHA3_RETURN_OK=0,
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SHA3_RETURN_BAD_PARAMS=1
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};
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typedef enum SHA3_RETURN sha3_return_t;
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/* For Init or Reset call these: */
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sha3_return_t sha3_Init(void *priv, unsigned bitSize);
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void sha3_Init256(void *priv);
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void sha3_Init384(void *priv);
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void sha3_Init512(void *priv);
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enum SHA3_FLAGS sha3_SetFlags(void *priv, enum SHA3_FLAGS);
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void sha3_Update(void *priv, void const *bufIn, size_t len);
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void const *sha3_Finalize(void *priv);
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/* Single-call hashing */
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#ifdef __cplusplus
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extern "C"
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#endif
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sha3_return_t sha3_HashBuffer(
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unsigned bitSize, /* 256, 384, 512 */
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enum SHA3_FLAGS flags, /* SHA3_FLAGS_NONE or SHA3_FLAGS_KECCAK */
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const void *in, unsigned inBytes,
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void *out, unsigned outBytes ); /* up to bitSize/8; truncation OK */
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#endif
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