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Make the frankly ridiculous prototypes for modpow() and modmul() more sane

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[originally from svn r752]
This commit is contained in:
Simon Tatham
2000-10-23 16:11:31 +00:00
parent bf2744aabf
commit e51b4da9f7
6 changed files with 33 additions and 34 deletions
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32
sshdss.c
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@ -190,7 +190,7 @@ static int dss_verifysig(char *sig, int siglen, char *data, int datalen) {
char *p;
int slen;
char hash[20];
Bignum r, s, w, i1, i2, i3, u1, u2, sha, v;
Bignum r, s, w, gu1p, yu2p, gu1yu2p, u1, u2, sha, v;
int ret;
if (!dss_p)
@ -243,34 +243,28 @@ static int dss_verifysig(char *sig, int siglen, char *data, int datalen) {
/*
* Step 2. u1 <- SHA(message) * w mod q.
*/
u1 = newbn(dss_q[0]);
SHA_Simple(data, datalen, hash);
p = hash; slen = 20; sha = get160(&p, &slen);
diagbn("sha=", sha);
modmul(sha, w, dss_q, u1);
u1 = modmul(sha, w, dss_q);
diagbn("u1=", u1);
/*
* Step 3. u2 <- r * w mod q.
*/
u2 = newbn(dss_q[0]);
modmul(r, w, dss_q, u2);
u2 = modmul(r, w, dss_q);
diagbn("u2=", u2);
/*
* Step 4. v <- (g^u1 * y^u2 mod p) mod q.
*/
i1 = newbn(dss_p[0]);
i2 = newbn(dss_p[0]);
i3 = newbn(dss_p[0]);
v = newbn(dss_q[0]);
modpow(dss_g, u1, dss_p, i1);
diagbn("gu1p=", i1);
modpow(dss_y, u2, dss_p, i2);
diagbn("yu2p=", i2);
modmul(i1, i2, dss_p, i3);
diagbn("gu1yu2p=", i3);
modmul(i3, One, dss_q, v);
gu1p = modpow(dss_g, u1, dss_p);
diagbn("gu1p=", gu1p);
yu2p = modpow(dss_y, u2, dss_p);
diagbn("yu2p=", yu2p);
gu1yu2p = modmul(gu1p, yu2p, dss_p);
diagbn("gu1yu2p=", gu1yu2p);
v = modmul(gu1yu2p, One, dss_q);
diagbn("gu1yu2q=v=", v);
diagbn("r=", r);
@ -282,9 +276,9 @@ static int dss_verifysig(char *sig, int siglen, char *data, int datalen) {
freebn(w);
freebn(sha);
freebn(i1);
freebn(i2);
freebn(i3);
freebn(gu1p);
freebn(yu2p);
freebn(gu1yu2p);
freebn(v);
freebn(r);
freebn(s);