[v4,16/30] crypto: n2/des - switch to new verification routines
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Message ID 20190805170037.31330-17-ard.biesheuvel@linaro.org
State Changes Requested
Delegated to: Herbert Xu
Headers show
Series
  • crypto: DES/3DES cleanup
Related show

Commit Message

Ard Biesheuvel Aug. 5, 2019, 5 p.m. UTC
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 drivers/crypto/n2_core.c | 26 ++++++--------------
 1 file changed, 7 insertions(+), 19 deletions(-)

Patch
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diff --git a/drivers/crypto/n2_core.c b/drivers/crypto/n2_core.c
index 760e72a5893b..bad1719a902f 100644
--- a/drivers/crypto/n2_core.c
+++ b/drivers/crypto/n2_core.c
@@ -17,7 +17,7 @@ 
 #include <crypto/md5.h>
 #include <crypto/sha.h>
 #include <crypto/aes.h>
-#include <crypto/des.h>
+#include <crypto/internal/des.h>
 #include <linux/mutex.h>
 #include <linux/delay.h>
 #include <linux/sched.h>
@@ -760,21 +760,13 @@  static int n2_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
 	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 	struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
 	struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
-	u32 tmp[DES_EXPKEY_WORDS];
 	int err;
 
-	ctx->enc_type = n2alg->enc_type;
-
-	if (keylen != DES_KEY_SIZE) {
-		crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
+	err = crypto_des_verify_key(tfm, key);
+	if (err)
+		return err;
 
-	err = des_ekey(tmp, key);
-	if (err == 0 && (tfm->crt_flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) {
-		tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
-		return -EINVAL;
-	}
+	ctx->enc_type = n2alg->enc_type;
 
 	ctx->key_len = keylen;
 	memcpy(ctx->key.des, key, keylen);
@@ -787,15 +779,11 @@  static int n2_3des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
 	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 	struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
 	struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
-	u32 flags;
 	int err;
 
-	flags = crypto_ablkcipher_get_flags(cipher);
-	err = __des3_verify_key(&flags, key);
-	if (unlikely(err)) {
-		crypto_ablkcipher_set_flags(cipher, flags);
+	err = crypto_des3_ede_verify_key(tfm, key);
+	if (err)
 		return err;
-	}
 
 	ctx->enc_type = n2alg->enc_type;