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crypto: caam/qi2 - add support for ChaCha20 

Add support for ChaCha20 skcipher algorithm.

Signed-off-by: Carmen Iorga <carmen.iorga@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă 2018-11-08 15:36:28 +02:00 committed by Herbert Xu
parent d239b10d4c
commit c99d4a2454
4 changed files with 36 additions and 4 deletions
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6
drivers/crypto/caam/caamalg_desc.c
View File

@ -1228,7 +1228,8 @@ static inline void skcipher_append_src_dst(u32 *desc)
* @desc: pointer to buffer used for descriptor construction
* @cdata: pointer to block cipher transform definitions
* Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128
* - OP_ALG_ALGSEL_CHACHA20
* @ivsize: initialization vector size
* @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
* @ctx1_iv_off: IV offset in CONTEXT1 register
@ -1293,7 +1294,8 @@ EXPORT_SYMBOL(cnstr_shdsc_skcipher_encap);
* @desc: pointer to buffer used for descriptor construction
* @cdata: pointer to block cipher transform definitions
* Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128
* - OP_ALG_ALGSEL_CHACHA20
* @ivsize: initialization vector size
* @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
* @ctx1_iv_off: IV offset in CONTEXT1 register

27
drivers/crypto/caam/caamalg_qi2.c
View File

@ -816,7 +816,9 @@ static int skcipher_setkey(struct crypto_skcipher *skcipher, const u8 *key,
u32 *desc;
u32 ctx1_iv_off = 0;
const bool ctr_mode = ((ctx->cdata.algtype & OP_ALG_AAI_MASK) ==
OP_ALG_AAI_CTR_MOD128);
OP_ALG_AAI_CTR_MOD128) &&
((ctx->cdata.algtype & OP_ALG_ALGSEL_MASK) !=
OP_ALG_ALGSEL_CHACHA20);
const bool is_rfc3686 = alg->caam.rfc3686;
print_hex_dump_debug("key in @" __stringify(__LINE__)": ",
@ -1494,7 +1496,23 @@ static struct caam_skcipher_alg driver_algs[] = {
.ivsize = AES_BLOCK_SIZE,
},
.caam.class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_XTS,
}
},
{
.skcipher = {
.base = {
.cra_name = "chacha20",
.cra_driver_name = "chacha20-caam-qi2",
.cra_blocksize = 1,
},
.setkey = skcipher_setkey,
.encrypt = skcipher_encrypt,
.decrypt = skcipher_decrypt,
.min_keysize = CHACHA20_KEY_SIZE,
.max_keysize = CHACHA20_KEY_SIZE,
.ivsize = CHACHA20_IV_SIZE,
},
.caam.class1_alg_type = OP_ALG_ALGSEL_CHACHA20,
},
};
static struct caam_aead_alg driver_aeads[] = {
@ -4908,6 +4926,11 @@ static int dpaa2_caam_probe(struct fsl_mc_device *dpseci_dev)
alg_sel == OP_ALG_ALGSEL_AES)
continue;
/* Skip CHACHA20 algorithms if not supported by device */
if (alg_sel == OP_ALG_ALGSEL_CHACHA20 &&
!priv->sec_attr.ccha_acc_num)
continue;
t_alg->caam.dev = dev;
caam_skcipher_alg_init(t_alg);

1
drivers/crypto/caam/compat.h
View File

@ -36,6 +36,7 @@
#include <crypto/gcm.h>
#include <crypto/sha.h>
#include <crypto/md5.h>
#include <crypto/chacha20.h>
#include <crypto/internal/aead.h>
#include <crypto/authenc.h>
#include <crypto/akcipher.h>

6
drivers/crypto/caam/desc.h
View File

@ -1159,6 +1159,7 @@
#define OP_ALG_ALGSEL_KASUMI (0x70 << OP_ALG_ALGSEL_SHIFT)
#define OP_ALG_ALGSEL_CRC (0x90 << OP_ALG_ALGSEL_SHIFT)
#define OP_ALG_ALGSEL_SNOW_F9 (0xA0 << OP_ALG_ALGSEL_SHIFT)
#define OP_ALG_ALGSEL_CHACHA20 (0xD0 << OP_ALG_ALGSEL_SHIFT)
#define OP_ALG_AAI_SHIFT 4
#define OP_ALG_AAI_MASK (0x1ff << OP_ALG_AAI_SHIFT)
@ -1206,6 +1207,11 @@
#define OP_ALG_AAI_RNG4_AI (0x80 << OP_ALG_AAI_SHIFT)
#define OP_ALG_AAI_RNG4_SK (0x100 << OP_ALG_AAI_SHIFT)
/* Chacha20 AAI set */
#define OP_ALG_AAI_AEAD (0x002 << OP_ALG_AAI_SHIFT)
#define OP_ALG_AAI_KEYSTREAM (0x001 << OP_ALG_AAI_SHIFT)
#define OP_ALG_AAI_BC8 (0x008 << OP_ALG_AAI_SHIFT)
/* hmac/smac AAI set */
#define OP_ALG_AAI_HASH (0x00 << OP_ALG_AAI_SHIFT)
#define OP_ALG_AAI_HMAC (0x01 << OP_ALG_AAI_SHIFT)