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crypto: bcm - Forbid 2-key 3DES in FIPS mode

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This patch forbids the use of 2-key 3DES (K1 == K3) in FIPS mode.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2019-04-11 16:51:01 +08:00
parent 52ea3cd291
commit a660824413
1 changed files with 11 additions and 10 deletions
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21
drivers/crypto/bcm/cipher.c
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@ -1840,13 +1840,14 @@ static int threedes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
struct iproc_ctx_s *ctx = crypto_ablkcipher_ctx(cipher);
if (keylen == (DES_KEY_SIZE * 3)) {
const u32 *K = (const u32 *)key;
u32 flags = CRYPTO_TFM_RES_BAD_KEY_SCHED;
u32 flags;
int ret;
if (!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
!((K[2] ^ K[4]) | (K[3] ^ K[5]))) {
flags = crypto_ablkcipher_get_flags(cipher);
ret = __des3_verify_key(&flags, key);
if (unlikely(ret)) {
crypto_ablkcipher_set_flags(cipher, flags);
return -EINVAL;
return ret;
}
ctx->cipher_type = CIPHER_TYPE_3DES;
@ -2885,13 +2886,13 @@ static int aead_authenc_setkey(struct crypto_aead *cipher,
break;
case CIPHER_ALG_3DES:
if (ctx->enckeylen == (DES_KEY_SIZE * 3)) {
const u32 *K = (const u32 *)keys.enckey;
u32 flags = CRYPTO_TFM_RES_BAD_KEY_SCHED;
u32 flags;
if (!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
!((K[2] ^ K[4]) | (K[3] ^ K[5]))) {
flags = crypto_aead_get_flags(cipher);
ret = __des3_verify_key(&flags, keys.enckey);
if (unlikely(ret)) {
crypto_aead_set_flags(cipher, flags);
return -EINVAL;
return ret;
}
ctx->cipher_type = CIPHER_TYPE_3DES;