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crypto: talitos - Add support for 3des

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This patch adds support for authenc(hmac(sha1),cbc(des3_ede))
to the talitos crypto driver for the Freescale Security Engine.
Some adjustments were made to the scatterlist to link table conversion
to make 3des work for ping -s 1439..1446.

Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Lee Nipper 2008-07-03 19:08:46 +08:00 committed by Herbert Xu
parent b43e726b32
commit 70bcaca753
2 changed files with 69 additions and 27 deletions
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93
drivers/crypto/talitos.c
View file

@ -642,20 +642,24 @@ static void talitos_unregister_rng(struct device *dev)
#define TALITOS_MAX_KEY_SIZE 64
#define TALITOS_MAX_AUTH_SIZE 20
#define TALITOS_AES_MIN_BLOCK_SIZE 16
#define TALITOS_3DES_MIN_BLOCK_SIZE 24
#define TALITOS_AES_IV_LENGTH 16
#define TALITOS_3DES_IV_LENGTH 8
#define TALITOS_MAX_IV_LENGTH 16
struct talitos_ctx {
struct device *dev;
__be32 desc_hdr_template;
u8 key[TALITOS_MAX_KEY_SIZE];
u8 iv[TALITOS_AES_IV_LENGTH];
u8 iv[TALITOS_MAX_IV_LENGTH];
unsigned int keylen;
unsigned int enckeylen;
unsigned int authkeylen;
unsigned int authsize;
};
static int aes_cbc_sha1_hmac_authenc_setauthsize(struct crypto_aead *authenc,
static int aead_authenc_setauthsize(struct crypto_aead *authenc,
unsigned int authsize)
{
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
@ -665,7 +669,7 @@ static int aes_cbc_sha1_hmac_authenc_setauthsize(struct crypto_aead *authenc,
return 0;
}
static int aes_cbc_sha1_hmac_authenc_setkey(struct crypto_aead *authenc,
static int aead_authenc_setkey(struct crypto_aead *authenc,
const u8 *key, unsigned int keylen)
{
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
@ -825,10 +829,12 @@ static void ipsec_esp_decrypt_done(struct device *dev,
* convert scatterlist to SEC h/w link table format
* stop at cryptlen bytes
*/
static void sg_to_link_tbl(struct scatterlist *sg, int sg_count,
static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
int cryptlen, struct talitos_ptr *link_tbl_ptr)
{
while (cryptlen > 0) {
int n_sg = sg_count;
while (n_sg--) {
link_tbl_ptr->ptr = cpu_to_be32(sg_dma_address(sg));
link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
link_tbl_ptr->j_extent = 0;
@ -837,13 +843,22 @@ static void sg_to_link_tbl(struct scatterlist *sg, int sg_count,
sg = sg_next(sg);
}
/* adjust (decrease) last entry's len to cryptlen */
/* adjust (decrease) last one (or two) entry's len to cryptlen */
link_tbl_ptr--;
while (link_tbl_ptr->len <= (-cryptlen)) {
/* Empty this entry, and move to previous one */
cryptlen += be16_to_cpu(link_tbl_ptr->len);
link_tbl_ptr->len = 0;
sg_count--;
link_tbl_ptr--;
}
link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len)
+ cryptlen);
/* tag end of link table */
link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
return sg_count;
}
/*
@ -900,12 +915,17 @@ static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq,
if (sg_count == 1) {
desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src));
} else {
sg_to_link_tbl(areq->src, sg_count, cryptlen,
&edesc->link_tbl[0]);
desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
desc->ptr[4].ptr = cpu_to_be32(edesc->dma_link_tbl);
dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
edesc->dma_len, DMA_BIDIRECTIONAL);
sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
&edesc->link_tbl[0]);
if (sg_count > 1) {
desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
desc->ptr[4].ptr = cpu_to_be32(edesc->dma_link_tbl);
dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
edesc->dma_len, DMA_BIDIRECTIONAL);
} else {
/* Only one segment now, so no link tbl needed */
desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src));
}
}
/* cipher out */
@ -931,8 +951,8 @@ static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq,
memcpy(link_tbl_ptr, &edesc->link_tbl[0],
edesc->src_nents * sizeof(struct talitos_ptr));
} else {
sg_to_link_tbl(areq->dst, sg_count, cryptlen,
link_tbl_ptr);
sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
link_tbl_ptr);
}
link_tbl_ptr += sg_count - 1;
@ -1038,7 +1058,7 @@ static struct ipsec_esp_edesc *ipsec_esp_edesc_alloc(struct aead_request *areq,
return edesc;
}
static int aes_cbc_sha1_hmac_authenc_encrypt(struct aead_request *req)
static int aead_authenc_encrypt(struct aead_request *req)
{
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
@ -1050,12 +1070,12 @@ static int aes_cbc_sha1_hmac_authenc_encrypt(struct aead_request *req)
return PTR_ERR(edesc);
/* set encrypt */
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_AESU_ENC;
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done);
}
static int aes_cbc_sha1_hmac_authenc_decrypt(struct aead_request *req)
static int aead_authenc_decrypt(struct aead_request *req)
{
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
@ -1089,7 +1109,7 @@ static int aes_cbc_sha1_hmac_authenc_decrypt(struct aead_request *req)
return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_done);
}
static int aes_cbc_sha1_hmac_authenc_givencrypt(
static int aead_authenc_givencrypt(
struct aead_givcrypt_request *req)
{
struct aead_request *areq = &req->areq;
@ -1103,7 +1123,7 @@ static int aes_cbc_sha1_hmac_authenc_givencrypt(
return PTR_ERR(edesc);
/* set encrypt */
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_AESU_ENC;
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
@ -1127,11 +1147,11 @@ static struct talitos_alg_template driver_algs[] = {
.driver_name = "authenc(hmac(sha1-talitos),cbc(aes-talitos))",
.blocksize = TALITOS_AES_MIN_BLOCK_SIZE,
.aead = {
.setkey = aes_cbc_sha1_hmac_authenc_setkey,
.setauthsize = aes_cbc_sha1_hmac_authenc_setauthsize,
.encrypt = aes_cbc_sha1_hmac_authenc_encrypt,
.decrypt = aes_cbc_sha1_hmac_authenc_decrypt,
.givencrypt = aes_cbc_sha1_hmac_authenc_givencrypt,
.setkey = aead_authenc_setkey,
.setauthsize = aead_authenc_setauthsize,
.encrypt = aead_authenc_encrypt,
.decrypt = aead_authenc_decrypt,
.givencrypt = aead_authenc_givencrypt,
.geniv = "<built-in>",
.ivsize = TALITOS_AES_IV_LENGTH,
.maxauthsize = TALITOS_MAX_AUTH_SIZE,
@ -1143,6 +1163,29 @@ static struct talitos_alg_template driver_algs[] = {
DESC_HDR_MODE1_MDEU_INIT |
DESC_HDR_MODE1_MDEU_PAD |
DESC_HDR_MODE1_MDEU_SHA1_HMAC,
},
{
.name = "authenc(hmac(sha1),cbc(des3_ede))",
.driver_name = "authenc(hmac(sha1-talitos),cbc(3des-talitos))",
.blocksize = TALITOS_3DES_MIN_BLOCK_SIZE,
.aead = {
.setkey = aead_authenc_setkey,
.setauthsize = aead_authenc_setauthsize,
.encrypt = aead_authenc_encrypt,
.decrypt = aead_authenc_decrypt,
.givencrypt = aead_authenc_givencrypt,
.geniv = "<built-in>",
.ivsize = TALITOS_3DES_IV_LENGTH,
.maxauthsize = TALITOS_MAX_AUTH_SIZE,
},
.desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
DESC_HDR_SEL0_DEU |
DESC_HDR_MODE0_DEU_CBC |
DESC_HDR_MODE0_DEU_3DES |
DESC_HDR_SEL1_MDEUA |
DESC_HDR_MODE1_MDEU_INIT |
DESC_HDR_MODE1_MDEU_PAD |
DESC_HDR_MODE1_MDEU_SHA1_HMAC,
}
};
@ -1166,7 +1209,7 @@ static int talitos_cra_init(struct crypto_tfm *tfm)
ctx->desc_hdr_template = talitos_alg->desc_hdr_template;
/* random first IV */
get_random_bytes(ctx->iv, TALITOS_AES_IV_LENGTH);
get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH);
return 0;
}

3
drivers/crypto/talitos.h
View file

@ -144,11 +144,10 @@
#define DESC_HDR_SEL0_CRCU __constant_cpu_to_be32(0x80000000)
/* primary execution unit mode (MODE0) and derivatives */
#define DESC_HDR_MODE0_ENCRYPT __constant_cpu_to_be32(0x00100000)
#define DESC_HDR_MODE0_AESU_CBC __constant_cpu_to_be32(0x00200000)
#define DESC_HDR_MODE0_AESU_ENC __constant_cpu_to_be32(0x00100000)
#define DESC_HDR_MODE0_DEU_CBC __constant_cpu_to_be32(0x00400000)
#define DESC_HDR_MODE0_DEU_3DES __constant_cpu_to_be32(0x00200000)
#define DESC_HDR_MODE0_DEU_ENC __constant_cpu_to_be32(0x00100000)
#define DESC_HDR_MODE0_MDEU_INIT __constant_cpu_to_be32(0x01000000)
#define DESC_HDR_MODE0_MDEU_HMAC __constant_cpu_to_be32(0x00800000)
#define DESC_HDR_MODE0_MDEU_PAD __constant_cpu_to_be32(0x00400000)