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crypto: n2 - remove ecb(arc4) support 

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2020-08-31 18:16:46 +03:00 committed by Herbert Xu
parent e33d2a7b30
commit b2ba047684
1 changed files with 0 additions and 46 deletions
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46
drivers/crypto/n2_core.c
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@ -662,7 +662,6 @@ struct n2_skcipher_context {
u8 aes[AES_MAX_KEY_SIZE];
u8 des[DES_KEY_SIZE];
u8 des3[3 * DES_KEY_SIZE];
u8 arc4[258]; /* S-box, X, Y */
} key;
};
@ -789,36 +788,6 @@ static int n2_3des_setkey(struct crypto_skcipher *skcipher, const u8 *key,
return 0;
}
static int n2_arc4_setkey(struct crypto_skcipher *skcipher, const u8 *key,
unsigned int keylen)
{
struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
struct n2_skcipher_context *ctx = crypto_tfm_ctx(tfm);
struct n2_skcipher_alg *n2alg = n2_skcipher_alg(skcipher);
u8 *s = ctx->key.arc4;
u8 *x = s + 256;
u8 *y = x + 1;
int i, j, k;
ctx->enc_type = n2alg->enc_type;
j = k = 0;
*x = 0;
*y = 0;
for (i = 0; i < 256; i++)
s[i] = i;
for (i = 0; i < 256; i++) {
u8 a = s[i];
j = (j + key[k] + a) & 0xff;
s[i] = s[j];
s[j] = a;
if (++k >= keylen)
k = 0;
}
return 0;
}
static inline int skcipher_descriptor_len(int nbytes, unsigned int block_size)
{
int this_len = nbytes;
@ -1122,21 +1091,6 @@ struct n2_skcipher_tmpl {
};
static const struct n2_skcipher_tmpl skcipher_tmpls[] = {
/* ARC4: only ECB is supported (chaining bits ignored) */
{ .name = "ecb(arc4)",
.drv_name = "ecb-arc4",
.block_size = 1,
.enc_type = (ENC_TYPE_ALG_RC4_STREAM |
ENC_TYPE_CHAINING_ECB),
.skcipher = {
.min_keysize = 1,
.max_keysize = 256,
.setkey = n2_arc4_setkey,
.encrypt = n2_encrypt_ecb,
.decrypt = n2_decrypt_ecb,
},
},
/* DES: ECB CBC and CFB are supported */
{ .name = "ecb(des)",
.drv_name = "ecb-des",