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19 lines
615 B
C
19 lines
615 B
C
/* public domain sha256 implementation based on fips180-3 */
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struct sha256 {
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uint64_t len; /* processed message length */
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uint32_t h[8]; /* hash state */
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uint8_t buf[64]; /* message block buffer */
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};
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enum { SHA256_DIGEST_LENGTH = 32 };
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/* reset state */
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void sha256_init(void *ctx);
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/* process message */
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void sha256_update(void *ctx, const void *m, unsigned long len);
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/* get message digest */
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/* state is ruined after sum, keep a copy if multiple sum is needed */
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/* part of the message might be left in s, zero it if secrecy is needed */
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void sha256_sum(void *ctx, uint8_t md[SHA256_DIGEST_LENGTH]);
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