diff options
Diffstat (limited to 'lib/hcrypto/bn.c')
| -rw-r--r-- | lib/hcrypto/bn.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/hcrypto/bn.c b/lib/hcrypto/bn.c index e7d5b0473716..91933c0a2943 100644 --- a/lib/hcrypto/bn.c +++ b/lib/hcrypto/bn.c @@ -142,7 +142,8 @@ BN_bin2bn(const void *s, int len, BIGNUM *bn) return NULL; } hi->length = len; - memcpy(hi->data, s, len); + if (len) + memcpy(hi->data, s, len); return (BIGNUM *)hi; } @@ -237,7 +238,7 @@ BN_is_bit_set(const BIGNUM *bn, int bit) heim_integer *hi = (heim_integer *)bn; unsigned char *p = hi->data; - if ((bit / 8) > hi->length || hi->length == 0) + if ((bit / 8) >= hi->length || hi->length == 0) return 0; return p[hi->length - 1 - (bit / 8)] & is_set[bit % 8]; @@ -250,7 +251,7 @@ BN_set_bit(BIGNUM *bn, int bit) unsigned char *p; if ((bit / 8) > hi->length || hi->length == 0) { - size_t len = (bit + 7) / 8; + size_t len = bit == 0 ? 1 : (bit + 7) / 8; void *d = realloc(hi->data, len); if (d == NULL) return 0; |