Replace remaining occurences (just as we did in crypto/) under arch/*/crypto/ that make use of memcmp() for comparing keys or authentication tags for usage with crypto_memneq(). It can simply be used as a drop-in replacement for the normal memcmp().
Signed-off-by: Daniel Borkmann <[email protected]> Cc: James Yonan <[email protected]> --- arch/s390/crypto/des_s390.c | 6 +++--- arch/x86/crypto/aesni-intel_glue.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/s390/crypto/des_s390.c b/arch/s390/crypto/des_s390.c index bcca01c..200f2a1 100644 --- a/arch/s390/crypto/des_s390.c +++ b/arch/s390/crypto/des_s390.c @@ -237,9 +237,9 @@ static int des3_setkey(struct crypto_tfm *tfm, const u8 *key, struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); u32 *flags = &tfm->crt_flags; - if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) && - memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2], - DES_KEY_SIZE)) && + if (!(crypto_memneq(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) && + crypto_memneq(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2], + DES_KEY_SIZE)) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) { *flags |= CRYPTO_TFM_RES_WEAK_KEY; return -EINVAL; diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c index 835488b..aba34b8 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -1001,7 +1001,7 @@ static int __driver_rfc4106_decrypt(struct aead_request *req) authTag, auth_tag_len); /* Compare generated tag with passed in tag. */ - retval = memcmp(src + tempCipherLen, authTag, auth_tag_len) ? + retval = crypto_memneq(src + tempCipherLen, authTag, auth_tag_len) ? -EBADMSG : 0; if (one_entry_in_sg) { -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
