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crypto: n2 - 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>
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1 changed files with 9 additions and 4 deletions
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@ -788,13 +788,18 @@ static int n2_3des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
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struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
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struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
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struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
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struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
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struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
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struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
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u32 flags;
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int err;
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flags = crypto_ablkcipher_get_flags(cipher);
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err = __des3_verify_key(&flags, key);
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if (unlikely(err)) {
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crypto_ablkcipher_set_flags(cipher, flags);
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return err;
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}
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ctx->enc_type = n2alg->enc_type;
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ctx->enc_type = n2alg->enc_type;
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if (keylen != (3 * DES_KEY_SIZE)) {
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crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
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return -EINVAL;
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}
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ctx->key_len = keylen;
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ctx->key_len = keylen;
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memcpy(ctx->key.des3, key, keylen);
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memcpy(ctx->key.des3, key, keylen);
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return 0;
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return 0;
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