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