diff options
-rw-r--r-- | crypto/bn/bn_print.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/crypto/bn/bn_print.c b/crypto/bn/bn_print.c index 15bc51af9e..611765341d 100644 --- a/crypto/bn/bn_print.c +++ b/crypto/bn/bn_print.c @@ -71,7 +71,12 @@ char *BN_bn2hex(const BIGNUM *a) char *buf; char *p; - buf = (char *)OPENSSL_malloc(a->top * BN_BYTES * 2 + 2); + if (a->neg && BN_is_zero(a)) { + /* "-0" == 3 bytes including NULL terminator */ + buf = OPENSSL_malloc(3); + } else { + buf = OPENSSL_malloc(a->top * BN_BYTES * 2 + 2); + } if (buf == NULL) { BNerr(BN_F_BN_BN2HEX, ERR_R_MALLOC_FAILURE); goto err; |