diff options
| author | Rich Salz <rsalz@akamai.com> | 2015-08-10 12:45:25 -0400 |
|---|---|---|
| committer | Rich Salz <rsalz@openssl.org> | 2015-08-26 07:00:43 -0400 |
| commit | 22dc08d00ae9517048b1ca44cd3810128eba0273 (patch) | |
| tree | 49f25f457422749d9888865e1afc8f05c945ed5a /crypto/bn | |
| parent | ddcc5e5b60e2e14a7f65cc8faff0642cb68f4343 (diff) | |
BN_bin2bn handle leading zero's
If a binary sequence is all zero's, call BN_zero.
Reviewed-by: Matt Caswell <matt@openssl.org>
Diffstat (limited to 'crypto/bn')
| -rw-r--r-- | crypto/bn/bn_lib.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/crypto/bn/bn_lib.c b/crypto/bn/bn_lib.c index 4e133ce8ca..c8e8519d8b 100644 --- a/crypto/bn/bn_lib.c +++ b/crypto/bn/bn_lib.c @@ -552,7 +552,9 @@ BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret) if (ret == NULL) return (NULL); bn_check_top(ret); - l = 0; + /* Skip leading zero's. */ + for ( ; *s == 0 && len > 0; s++, len--) + continue; n = len; if (n == 0) { ret->top = 0; @@ -566,6 +568,7 @@ BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret) } ret->top = i; ret->neg = 0; + l = 0; while (n--) { l = (l << 8L) | *(s++); if (m-- == 0) { |