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crypto: marvell/cesa - add DES support 

Add support for DES operations.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Boris BREZILLON 2015-06-18 15:46:22 +02:00 committed by Herbert Xu
parent db509a4533
commit 7b3aaaa095
3 changed files with 154 additions and 0 deletions
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2
drivers/crypto/marvell/cesa.c
View File

@ -169,6 +169,8 @@ static void mv_cesa_remove_algs(struct mv_cesa_dev *cesa)
}
static struct crypto_alg *armada_370_cipher_algs[] = {
&mv_cesa_ecb_des_alg,
&mv_cesa_cbc_des_alg,
&mv_cesa_ecb_aes_alg,
&mv_cesa_cbc_aes_alg,
};

2
drivers/crypto/marvell/cesa.h
View File

@ -777,6 +777,8 @@ int mv_cesa_dma_add_op_transfers(struct mv_cesa_tdma_chain *chain,
extern struct ahash_alg mv_sha1_alg;
extern struct ahash_alg mv_ahmac_sha1_alg;
extern struct crypto_alg mv_cesa_ecb_des_alg;
extern struct crypto_alg mv_cesa_cbc_des_alg;
extern struct crypto_alg mv_cesa_ecb_aes_alg;
extern struct crypto_alg mv_cesa_cbc_aes_alg;

150
drivers/crypto/marvell/cipher.c
View File

@ -13,9 +13,15 @@
*/
#include <crypto/aes.h>
#include <crypto/des.h>
#include "cesa.h"
struct mv_cesa_des_ctx {
struct mv_cesa_ctx base;
u8 key[DES_KEY_SIZE];
};
struct mv_cesa_aes_ctx {
struct mv_cesa_ctx base;
struct crypto_aes_ctx aes;
@ -238,6 +244,30 @@ static int mv_cesa_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
return 0;
}
static int mv_cesa_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
unsigned int len)
{
struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(tfm);
u32 tmp[DES_EXPKEY_WORDS];
int ret;
if (len != DES_KEY_SIZE) {
crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
ret = des_ekey(tmp, key);
if (!ret && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
return -EINVAL;
}
memcpy(ctx->key, key, DES_KEY_SIZE);
return 0;
}
static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req,
const struct mv_cesa_op_ctx *op_templ)
{
@ -364,6 +394,126 @@ static int mv_cesa_ablkcipher_req_init(struct ablkcipher_request *req,
return ret;
}
static int mv_cesa_des_op(struct ablkcipher_request *req,
struct mv_cesa_op_ctx *tmpl)
{
struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
int ret;
mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTM_DES,
CESA_SA_DESC_CFG_CRYPTM_MSK);
memcpy(tmpl->ctx.blkcipher.key, ctx->key, DES_KEY_SIZE);
ret = mv_cesa_ablkcipher_req_init(req, tmpl);
if (ret)
return ret;
ret = mv_cesa_queue_req(&req->base);
if (ret && ret != -EINPROGRESS)
mv_cesa_ablkcipher_cleanup(req);
return ret;
}
static int mv_cesa_ecb_des_encrypt(struct ablkcipher_request *req)
{
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl,
CESA_SA_DESC_CFG_CRYPTCM_ECB |
CESA_SA_DESC_CFG_DIR_ENC);
return mv_cesa_des_op(req, &tmpl);
}
static int mv_cesa_ecb_des_decrypt(struct ablkcipher_request *req)
{
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl,
CESA_SA_DESC_CFG_CRYPTCM_ECB |
CESA_SA_DESC_CFG_DIR_DEC);
return mv_cesa_des_op(req, &tmpl);
}
struct crypto_alg mv_cesa_ecb_des_alg = {
.cra_name = "ecb(des)",
.cra_driver_name = "mv-ecb-des",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = mv_cesa_ablkcipher_cra_init,
.cra_u = {
.ablkcipher = {
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.setkey = mv_cesa_des_setkey,
.encrypt = mv_cesa_ecb_des_encrypt,
.decrypt = mv_cesa_ecb_des_decrypt,
},
},
};
static int mv_cesa_cbc_des_op(struct ablkcipher_request *req,
struct mv_cesa_op_ctx *tmpl)
{
mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
CESA_SA_DESC_CFG_CRYPTCM_MSK);
memcpy(tmpl->ctx.blkcipher.iv, req->info, DES_BLOCK_SIZE);
return mv_cesa_des_op(req, tmpl);
}
static int mv_cesa_cbc_des_encrypt(struct ablkcipher_request *req)
{
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
return mv_cesa_cbc_des_op(req, &tmpl);
}
static int mv_cesa_cbc_des_decrypt(struct ablkcipher_request *req)
{
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
return mv_cesa_cbc_des_op(req, &tmpl);
}
struct crypto_alg mv_cesa_cbc_des_alg = {
.cra_name = "cbc(des)",
.cra_driver_name = "mv-cbc-des",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = mv_cesa_ablkcipher_cra_init,
.cra_u = {
.ablkcipher = {
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
.setkey = mv_cesa_des_setkey,
.encrypt = mv_cesa_cbc_des_encrypt,
.decrypt = mv_cesa_cbc_des_decrypt,
},
},
};
static int mv_cesa_aes_op(struct ablkcipher_request *req,
struct mv_cesa_op_ctx *tmpl)
{