43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
// SHA-224. Adapted from LibTomCrypt. This code is Public Domain
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#include "hash.h"
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#include <blue/core/hash.h>
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#include <string.h>
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extern void z__b_sha2_256_update(
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struct b_hash_ctx *md, const void *src, size_t inlen);
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extern void z__b_sha2_256_finish(struct b_hash_ctx *md, void *out, size_t max);
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static void sha_init(struct b_hash_ctx *md)
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{
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md->ctx_state.sha2_256.curlen = 0;
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md->ctx_state.sha2_256.length = 0;
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md->ctx_state.sha2_256.state[0] = 0xc1059ed8UL;
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md->ctx_state.sha2_256.state[1] = 0x367cd507UL;
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md->ctx_state.sha2_256.state[2] = 0x3070dd17UL;
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md->ctx_state.sha2_256.state[3] = 0xf70e5939UL;
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md->ctx_state.sha2_256.state[4] = 0xffc00b31UL;
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md->ctx_state.sha2_256.state[5] = 0x68581511UL;
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md->ctx_state.sha2_256.state[6] = 0x64f98fa7UL;
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md->ctx_state.sha2_256.state[7] = 0xbefa4fa4UL;
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}
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static void sha_update(struct b_hash_ctx *md, const void *in, size_t inlen)
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{
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z__b_sha2_256_update(md, in, inlen);
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}
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static void sha_finish(struct b_hash_ctx *md, void *out, size_t max)
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{
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unsigned char res[B_DIGEST_LENGTH_SHA2_256];
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z__b_sha2_256_finish(md, res, max);
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/* truncate the digest to 224 bits */
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memcpy(out, res, b_min(size_t, max, B_DIGEST_LENGTH_224));
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}
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struct b_hash_function_ops z__b_sha2_224_ops = {
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.hash_init = sha_init,
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.hash_update = sha_update,
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.hash_finish = sha_finish,
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};
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