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	sha1.h - sbase - suckless unix tools
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	sha1.h (615B)
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	1 /* public domain sha1 implementation based on rfc3174 and libtomcrypt */
	2
	3 struct sha1 {
	4 uint64_t len; /* processed message length */
	5 uint32_t h[5]; /* hash state */
	6 uint8_t buf[64]; /* message block buffer */
	7 };
	8
	9 enum { SHA1_DIGEST_LENGTH = 20 };
	10
	11 /* reset state */
	12 void sha1_init(void *ctx);
	13 /* process message */
	14 void sha1_update(void ctx, const void m, unsigned long len);
	15 /* get message digest */
	16 /* state is ruined after sum, keep a copy if multiple sum is needed */
	17 /* part of the message might be left in s, zero it if secrecy is needed …
	18 void sha1_sum(void *ctx, uint8_t md[SHA1_DIGEST_LENGTH]);