From 907e95006820c84d2efe1adb2c8af8340f3ba6cc Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Wed, 3 Feb 2016 18:51:02 +0000 Subject: [PATCH] Use BN_bn2binpad Reviewed-by: Viktor Dukhovni --- crypto/ec/ec_key.c | 14 ++------------ 1 file changed, 2 insertions(+), 12 deletions(-) diff --git a/crypto/ec/ec_key.c b/crypto/ec/ec_key.c index 13324982d5..19628b1435 100644 --- a/crypto/ec/ec_key.c +++ b/crypto/ec/ec_key.c @@ -551,7 +551,7 @@ int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len, size_t EC_KEY_priv2oct(const EC_KEY *eckey, unsigned char *buf, size_t len) { - size_t buf_len, bn_len; + size_t buf_len; if (eckey->group == NULL || eckey->group->meth == NULL) return 0; @@ -563,23 +563,13 @@ size_t EC_KEY_priv2oct(const EC_KEY *eckey, unsigned char *buf, size_t len) else if (len < buf_len) return 0; - bn_len = (size_t)BN_num_bytes(eckey->priv_key); - /* Octetstring may need leading zeros if BN is to short */ - if (bn_len > buf_len) { + if (BN_bn2binpad(eckey->priv_key, buf, buf_len) == -1) { ECerr(EC_F_EC_KEY_PRIV2OCT, EC_R_BUFFER_TOO_SMALL); return 0; } - if (!BN_bn2bin(eckey->priv_key, buf + buf_len - bn_len)) { - ECerr(EC_F_EC_KEY_PRIV2OCT, ERR_R_BN_LIB); - return 0; - } - - if (buf_len - bn_len > 0) - memset(buf, 0, buf_len - bn_len); - return buf_len; } -- 2.25.1