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WebSVN – planix.SVN – Blame – /os/branches/feature-vt/sys/src/liboventi/plan9-sha1.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include <oventi.h>
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#include <libsec.h>
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static void encode(uchar*, u32int*, ulong);
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extern void vtSha1Block(u32int *s, uchar *p, ulong len);
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struct VtSha1
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{
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	DigestState *s;
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};
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VtSha1 *
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vtSha1Alloc(void)
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{
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	VtSha1 *s;
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	s = vtMemAlloc(sizeof(VtSha1));
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	vtSha1Init(s);
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	return s;
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}
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void
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vtSha1Free(VtSha1 *s)
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{
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	if(s == nil)
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		return;
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	if(s->s != nil)
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		free(s->s);
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	vtMemFree(s);
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}
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void
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vtSha1Init(VtSha1 *s)
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{
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	s->s = nil;
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}
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void
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vtSha1Update(VtSha1 *s, uchar *p, int len)
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{
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	s->s = sha1(p, len, nil, s->s);
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}
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void
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vtSha1Final(VtSha1 *s, uchar *digest)
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{
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	sha1(nil, 0, digest, s->s);
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	s->s = nil;
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}
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void
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vtSha1(uchar sha1[VtScoreSize], uchar *p, int n)
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{
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	VtSha1 s;
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	vtSha1Init(&s);
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	vtSha1Update(&s, p, n);
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	vtSha1Final(&s, sha1);
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}
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int
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vtSha1Check(uchar score[VtScoreSize], uchar *p, int n)
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{
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	VtSha1 s;
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	uchar score2[VtScoreSize];
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	vtSha1Init(&s);
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	vtSha1Update(&s, p, n);
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	vtSha1Final(&s, score2);
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	if(memcmp(score, score2, VtScoreSize) != 0) {
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		vtSetError("vtSha1Check failed");
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		return 0;
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	}
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	return 1;
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}