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fix forgotten leading 0 on SetRsaPublicKey

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This commit is contained in:
toddouska 2014-01-24 13:58:20 -08:00
parent 5945723d87
commit 21c9eb7b22
1 changed files with 7 additions and 2 deletions
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9
ctaocrypt/src/asn.c
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@ -4020,6 +4020,7 @@ static int SetRsaPublicKey(byte* output, RsaKey* key)
int idx;
int rawLen;
int leadingBit;
int err;
/* n */
leadingBit = mp_leading_bit(&key->n);
@ -4028,7 +4029,9 @@ static int SetRsaPublicKey(byte* output, RsaKey* key)
nSz = SetLength(rawLen, n + 1) + 1; /* int tag */
if ( (nSz + rawLen) < (int)sizeof(n)) {
int err = mp_to_unsigned_bin(&key->n, n + nSz + leadingBit);
if (leadingBit)
n[nSz] = 0;
err = mp_to_unsigned_bin(&key->n, n + nSz + leadingBit);
if (err == MP_OKAY)
nSz += rawLen;
else
@ -4044,7 +4047,9 @@ static int SetRsaPublicKey(byte* output, RsaKey* key)
eSz = SetLength(rawLen, e + 1) + 1; /* int tag */
if ( (eSz + rawLen) < (int)sizeof(e)) {
int err = mp_to_unsigned_bin(&key->e, e + eSz + leadingBit);
if (leadingBit)
e[eSz] = 0;
err = mp_to_unsigned_bin(&key->e, e + eSz + leadingBit);
if (err == MP_OKAY)
eSz += rawLen;
else