diff options
| author | Herbert Xu | 2019-04-11 16:51:05 +0800 |
|---|---|---|
| committer | Herbert Xu | 2019-04-18 22:14:59 +0800 |
| commit | 76a329cdcb1f3f000b58c67829b00e17b6a9fa27 (patch) | |
| tree | 9ef7a77363d613f649cf93a8f01a00b2ed0249eb /drivers/crypto/ccp/ccp-crypto-des3.c | |
| parent | 19291691b02f320e1dc4ea15856d61244b4315da (diff) | |
crypto: ccp - Forbid 2-key 3DES in FIPS mode
This patch forbids the use of 2-key 3DES (K1 == K3) in FIPS mode.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccp/ccp-crypto-des3.c')
| -rw-r--r-- | drivers/crypto/ccp/ccp-crypto-des3.c | 21 |
1 files changed, 4 insertions, 17 deletions
diff --git a/drivers/crypto/ccp/ccp-crypto-des3.c b/drivers/crypto/ccp/ccp-crypto-des3.c index c2ff551d215b..91482ffcac59 100644 --- a/drivers/crypto/ccp/ccp-crypto-des3.c +++ b/drivers/crypto/ccp/ccp-crypto-des3.c @@ -43,24 +43,11 @@ static int ccp_des3_setkey(struct crypto_ablkcipher *tfm, const u8 *key, struct ccp_crypto_ablkcipher_alg *alg = ccp_crypto_ablkcipher_alg(crypto_ablkcipher_tfm(tfm)); u32 *flags = &tfm->base.crt_flags; + int err; - - /* From des_generic.c: - * - * RFC2451: - * If the first two or last two independent 64-bit keys are - * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the - * same as DES. Implementers MUST reject keys that exhibit this - * property. - */ - const u32 *K = (const u32 *)key; - - if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) || - !((K[2] ^ K[4]) | (K[3] ^ K[5]))) && - (*flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) { - *flags |= CRYPTO_TFM_RES_WEAK_KEY; - return -EINVAL; - } + err = __des3_verify_key(flags, key); + if (unlikely(err)) + return err; /* It's not clear that there is any support for a keysize of 112. * If needed, the caller should make K1 == K3 |