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s390/crypto: cleanup cpacf function codes

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Use a separate define for the decryption modifier bit instead of
duplicating the function codes for encryption / decrypton.
In addition use an unsigned type for the function code.

Reviewed-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2016-08-15 09:19:16 +02:00
parent 474fd6e80f
commit edc63a3785
3 changed files with 110 additions and 133 deletions
Download Patch File Download Diff File Expand all files Collapse all files

98
arch/s390/crypto/aes_s390.c
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@@ -41,9 +41,8 @@ static char keylen_flag;
struct s390_aes_ctx {
u8 key[AES_MAX_KEY_SIZE];
long enc;
long dec;
int key_len;
unsigned long fc;
union {
struct crypto_skcipher *blk;
struct crypto_cipher *cip;
@@ -61,9 +60,8 @@ struct pcc_param {
struct s390_xts_ctx {
u8 key[32];
u8 pcc_key[32];
long enc;
long dec;
int key_len;
unsigned long fc;
struct crypto_skcipher *fallback;
};
@@ -146,16 +144,16 @@ static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
switch (sctx->key_len) {
case 16:
cpacf_km(CPACF_KM_AES_128_ENC, &sctx->key, out, in,
AES_BLOCK_SIZE);
cpacf_km(CPACF_KM_AES_128,
&sctx->key, out, in, AES_BLOCK_SIZE);
break;
case 24:
cpacf_km(CPACF_KM_AES_192_ENC, &sctx->key, out, in,
AES_BLOCK_SIZE);
cpacf_km(CPACF_KM_AES_192,
&sctx->key, out, in, AES_BLOCK_SIZE);
break;
case 32:
cpacf_km(CPACF_KM_AES_256_ENC, &sctx->key, out, in,
AES_BLOCK_SIZE);
cpacf_km(CPACF_KM_AES_256,
&sctx->key, out, in, AES_BLOCK_SIZE);
break;
}
}
@@ -171,16 +169,16 @@ static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
switch (sctx->key_len) {
case 16:
cpacf_km(CPACF_KM_AES_128_DEC, &sctx->key, out, in,
AES_BLOCK_SIZE);
cpacf_km(CPACF_KM_AES_128 | CPACF_DECRYPT,
&sctx->key, out, in, AES_BLOCK_SIZE);
break;
case 24:
cpacf_km(CPACF_KM_AES_192_DEC, &sctx->key, out, in,
AES_BLOCK_SIZE);
cpacf_km(CPACF_KM_AES_192 | CPACF_DECRYPT,
&sctx->key, out, in, AES_BLOCK_SIZE);
break;
case 32:
cpacf_km(CPACF_KM_AES_256_DEC, &sctx->key, out, in,
AES_BLOCK_SIZE);
cpacf_km(CPACF_KM_AES_256 | CPACF_DECRYPT,
&sctx->key, out, in, AES_BLOCK_SIZE);
break;
}
}
@@ -301,16 +299,13 @@ static int ecb_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
switch (key_len) {
case 16:
sctx->enc = CPACF_KM_AES_128_ENC;
sctx->dec = CPACF_KM_AES_128_DEC;
sctx->fc = CPACF_KM_AES_128;
break;
case 24:
sctx->enc = CPACF_KM_AES_192_ENC;
sctx->dec = CPACF_KM_AES_192_DEC;
sctx->fc = CPACF_KM_AES_192;
break;
case 32:
sctx->enc = CPACF_KM_AES_256_ENC;
sctx->dec = CPACF_KM_AES_256_DEC;
sctx->fc = CPACF_KM_AES_256;
break;
}
@@ -351,7 +346,7 @@ static int ecb_aes_encrypt(struct blkcipher_desc *desc,
return fallback_blk_enc(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_aes_crypt(desc, sctx->enc, sctx->key, &walk);
return ecb_aes_crypt(desc, sctx->fc, sctx->key, &walk);
}
static int ecb_aes_decrypt(struct blkcipher_desc *desc,
@@ -365,7 +360,7 @@ static int ecb_aes_decrypt(struct blkcipher_desc *desc,
return fallback_blk_dec(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_aes_crypt(desc, sctx->dec, sctx->key, &walk);
return ecb_aes_crypt(desc, sctx->fc | CPACF_DECRYPT, sctx->key, &walk);
}
static int fallback_init_blk(struct crypto_tfm *tfm)
@@ -430,16 +425,13 @@ static int cbc_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
switch (key_len) {
case 16:
sctx->enc = CPACF_KMC_AES_128_ENC;
sctx->dec = CPACF_KMC_AES_128_DEC;
sctx->fc = CPACF_KMC_AES_128;
break;
case 24:
sctx->enc = CPACF_KMC_AES_192_ENC;
sctx->dec = CPACF_KMC_AES_192_DEC;
sctx->fc = CPACF_KMC_AES_192;
break;
case 32:
sctx->enc = CPACF_KMC_AES_256_ENC;
sctx->dec = CPACF_KMC_AES_256_DEC;
sctx->fc = CPACF_KMC_AES_256;
break;
}
@@ -492,7 +484,7 @@ static int cbc_aes_encrypt(struct blkcipher_desc *desc,
return fallback_blk_enc(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_aes_crypt(desc, sctx->enc, &walk);
return cbc_aes_crypt(desc, sctx->fc, &walk);
}
static int cbc_aes_decrypt(struct blkcipher_desc *desc,
@@ -506,7 +498,7 @@ static int cbc_aes_decrypt(struct blkcipher_desc *desc,
return fallback_blk_dec(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_aes_crypt(desc, sctx->dec, &walk);
return cbc_aes_crypt(desc, sctx->fc | CPACF_DECRYPT, &walk);
}
static struct crypto_alg cbc_aes_alg = {
@@ -603,19 +595,16 @@ static int xts_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
switch (key_len) {
case 32:
xts_ctx->enc = CPACF_KM_XTS_128_ENC;
xts_ctx->dec = CPACF_KM_XTS_128_DEC;
xts_ctx->fc = CPACF_KM_XTS_128;
memcpy(xts_ctx->key + 16, in_key, 16);
memcpy(xts_ctx->pcc_key + 16, in_key + 16, 16);
break;
case 48:
xts_ctx->enc = 0;
xts_ctx->dec = 0;
xts_ctx->fc = 0;
xts_fallback_setkey(tfm, in_key, key_len);
break;
case 64:
xts_ctx->enc = CPACF_KM_XTS_256_ENC;
xts_ctx->dec = CPACF_KM_XTS_256_DEC;
xts_ctx->fc = CPACF_KM_XTS_256;
memcpy(xts_ctx->key, in_key, 32);
memcpy(xts_ctx->pcc_key, in_key + 32, 32);
break;
@@ -685,7 +674,7 @@ static int xts_aes_encrypt(struct blkcipher_desc *desc,
return xts_fallback_encrypt(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return xts_aes_crypt(desc, xts_ctx->enc, xts_ctx, &walk);
return xts_aes_crypt(desc, xts_ctx->fc, xts_ctx, &walk);
}
static int xts_aes_decrypt(struct blkcipher_desc *desc,
@@ -699,7 +688,7 @@ static int xts_aes_decrypt(struct blkcipher_desc *desc,
return xts_fallback_decrypt(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return xts_aes_crypt(desc, xts_ctx->dec, xts_ctx, &walk);
return xts_aes_crypt(desc, xts_ctx->fc | CPACF_DECRYPT, xts_ctx, &walk);
}
static int xts_fallback_init(struct crypto_tfm *tfm)
@@ -759,16 +748,13 @@ static int ctr_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
switch (key_len) {
case 16:
sctx->enc = CPACF_KMCTR_AES_128_ENC;
sctx->dec = CPACF_KMCTR_AES_128_DEC;
sctx->fc = CPACF_KMCTR_AES_128;
break;
case 24:
sctx->enc = CPACF_KMCTR_AES_192_ENC;
sctx->dec = CPACF_KMCTR_AES_192_DEC;
sctx->fc = CPACF_KMCTR_AES_192;
break;
case 32:
sctx->enc = CPACF_KMCTR_AES_256_ENC;
sctx->dec = CPACF_KMCTR_AES_256_DEC;
sctx->fc = CPACF_KMCTR_AES_256;
break;
}
@@ -865,7 +851,7 @@ static int ctr_aes_encrypt(struct blkcipher_desc *desc,
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ctr_aes_crypt(desc, sctx->enc, sctx, &walk);
return ctr_aes_crypt(desc, sctx->fc, sctx, &walk);
}
static int ctr_aes_decrypt(struct blkcipher_desc *desc,
@@ -876,7 +862,7 @@ static int ctr_aes_decrypt(struct blkcipher_desc *desc,
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ctr_aes_crypt(desc, sctx->dec, sctx, &walk);
return ctr_aes_crypt(desc, sctx->fc | CPACF_DECRYPT, sctx, &walk);
}
static struct crypto_alg ctr_aes_alg = {
@@ -906,11 +892,11 @@ static int __init aes_s390_init(void)
{
int ret;
if (cpacf_query(CPACF_KM, CPACF_KM_AES_128_ENC))
if (cpacf_query(CPACF_KM, CPACF_KM_AES_128))
keylen_flag |= AES_KEYLEN_128;
if (cpacf_query(CPACF_KM, CPACF_KM_AES_192_ENC))
if (cpacf_query(CPACF_KM, CPACF_KM_AES_192))
keylen_flag |= AES_KEYLEN_192;
if (cpacf_query(CPACF_KM, CPACF_KM_AES_256_ENC))
if (cpacf_query(CPACF_KM, CPACF_KM_AES_256))
keylen_flag |= AES_KEYLEN_256;
if (!keylen_flag)
@@ -933,17 +919,17 @@ static int __init aes_s390_init(void)
if (ret)
goto cbc_aes_err;
if (cpacf_query(CPACF_KM, CPACF_KM_XTS_128_ENC) &&
cpacf_query(CPACF_KM, CPACF_KM_XTS_256_ENC)) {
if (cpacf_query(CPACF_KM, CPACF_KM_XTS_128) &&
cpacf_query(CPACF_KM, CPACF_KM_XTS_256)) {
ret = crypto_register_alg(&xts_aes_alg);
if (ret)
goto xts_aes_err;
xts_aes_alg_reg = 1;
}
if (cpacf_query(CPACF_KMCTR, CPACF_KMCTR_AES_128_ENC) &&
cpacf_query(CPACF_KMCTR, CPACF_KMCTR_AES_192_ENC) &&
cpacf_query(CPACF_KMCTR, CPACF_KMCTR_AES_256_ENC)) {
if (cpacf_query(CPACF_KMCTR, CPACF_KMCTR_AES_128) &&
cpacf_query(CPACF_KMCTR, CPACF_KMCTR_AES_192) &&
cpacf_query(CPACF_KMCTR, CPACF_KMCTR_AES_256)) {
ctrblk = (u8 *) __get_free_page(GFP_KERNEL);
if (!ctrblk) {
ret = -ENOMEM;