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crypto: qat - add support for ctr(aes) and xts(aes)
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Add support for ctr and xts encryption modes.

Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Tadeusz Struk authored and Herbert Xu committed Oct 1, 2015
1 parent ecdd6be commit def14bf
Showing 1 changed file with 127 additions and 39 deletions.
166 changes: 127 additions & 39 deletions drivers/crypto/qat/qat_common/qat_algs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -62,13 +62,13 @@
#include "icp_qat_fw.h"
#include "icp_qat_fw_la.h"

#define QAT_AES_HW_CONFIG_CBC_ENC(alg) \
ICP_QAT_HW_CIPHER_CONFIG_BUILD(ICP_QAT_HW_CIPHER_CBC_MODE, alg, \
#define QAT_AES_HW_CONFIG_ENC(alg, mode) \
ICP_QAT_HW_CIPHER_CONFIG_BUILD(mode, alg, \
ICP_QAT_HW_CIPHER_NO_CONVERT, \
ICP_QAT_HW_CIPHER_ENCRYPT)

#define QAT_AES_HW_CONFIG_CBC_DEC(alg) \
ICP_QAT_HW_CIPHER_CONFIG_BUILD(ICP_QAT_HW_CIPHER_CBC_MODE, alg, \
#define QAT_AES_HW_CONFIG_DEC(alg, mode) \
ICP_QAT_HW_CIPHER_CONFIG_BUILD(mode, alg, \
ICP_QAT_HW_CIPHER_KEY_CONVERT, \
ICP_QAT_HW_CIPHER_DECRYPT)

Expand Down Expand Up @@ -271,7 +271,8 @@ static void qat_alg_init_common_hdr(struct icp_qat_fw_comn_req_hdr *header)

static int qat_alg_aead_init_enc_session(struct crypto_aead *aead_tfm,
int alg,
struct crypto_authenc_keys *keys)
struct crypto_authenc_keys *keys,
int mode)
{
struct qat_alg_aead_ctx *ctx = crypto_aead_ctx(aead_tfm);
unsigned int digestsize = crypto_aead_authsize(aead_tfm);
Expand All @@ -288,7 +289,7 @@ static int qat_alg_aead_init_enc_session(struct crypto_aead *aead_tfm,
struct icp_qat_fw_auth_cd_ctrl_hdr *hash_cd_ctrl = ptr;

/* CD setup */
cipher->aes.cipher_config.val = QAT_AES_HW_CONFIG_CBC_ENC(alg);
cipher->aes.cipher_config.val = QAT_AES_HW_CONFIG_ENC(alg, mode);
memcpy(cipher->aes.key, keys->enckey, keys->enckeylen);
hash->sha.inner_setup.auth_config.config =
ICP_QAT_HW_AUTH_CONFIG_BUILD(ICP_QAT_HW_AUTH_MODE1,
Expand Down Expand Up @@ -351,7 +352,8 @@ static int qat_alg_aead_init_enc_session(struct crypto_aead *aead_tfm,

static int qat_alg_aead_init_dec_session(struct crypto_aead *aead_tfm,
int alg,
struct crypto_authenc_keys *keys)
struct crypto_authenc_keys *keys,
int mode)
{
struct qat_alg_aead_ctx *ctx = crypto_aead_ctx(aead_tfm);
unsigned int digestsize = crypto_aead_authsize(aead_tfm);
Expand All @@ -373,7 +375,7 @@ static int qat_alg_aead_init_dec_session(struct crypto_aead *aead_tfm,
sizeof(struct icp_qat_fw_la_cipher_req_params));

/* CD setup */
cipher->aes.cipher_config.val = QAT_AES_HW_CONFIG_CBC_DEC(alg);
cipher->aes.cipher_config.val = QAT_AES_HW_CONFIG_DEC(alg, mode);
memcpy(cipher->aes.key, keys->enckey, keys->enckeylen);
hash->sha.inner_setup.auth_config.config =
ICP_QAT_HW_AUTH_CONFIG_BUILD(ICP_QAT_HW_AUTH_MODE1,
Expand Down Expand Up @@ -464,64 +466,83 @@ static void qat_alg_ablkcipher_init_com(struct qat_alg_ablkcipher_ctx *ctx,

static void qat_alg_ablkcipher_init_enc(struct qat_alg_ablkcipher_ctx *ctx,
int alg, const uint8_t *key,
unsigned int keylen)
unsigned int keylen, int mode)
{
struct icp_qat_hw_cipher_algo_blk *enc_cd = ctx->enc_cd;
struct icp_qat_fw_la_bulk_req *req = &ctx->enc_fw_req;
struct icp_qat_fw_comn_req_hdr_cd_pars *cd_pars = &req->cd_pars;

qat_alg_ablkcipher_init_com(ctx, req, enc_cd, key, keylen);
cd_pars->u.s.content_desc_addr = ctx->enc_cd_paddr;
enc_cd->aes.cipher_config.val = QAT_AES_HW_CONFIG_CBC_ENC(alg);
enc_cd->aes.cipher_config.val = QAT_AES_HW_CONFIG_ENC(alg, mode);
}

static void qat_alg_ablkcipher_init_dec(struct qat_alg_ablkcipher_ctx *ctx,
int alg, const uint8_t *key,
unsigned int keylen)
unsigned int keylen, int mode)
{
struct icp_qat_hw_cipher_algo_blk *dec_cd = ctx->dec_cd;
struct icp_qat_fw_la_bulk_req *req = &ctx->dec_fw_req;
struct icp_qat_fw_comn_req_hdr_cd_pars *cd_pars = &req->cd_pars;

qat_alg_ablkcipher_init_com(ctx, req, dec_cd, key, keylen);
cd_pars->u.s.content_desc_addr = ctx->dec_cd_paddr;
dec_cd->aes.cipher_config.val = QAT_AES_HW_CONFIG_CBC_DEC(alg);

if (mode != ICP_QAT_HW_CIPHER_CTR_MODE)
dec_cd->aes.cipher_config.val =
QAT_AES_HW_CONFIG_DEC(alg, mode);
else
dec_cd->aes.cipher_config.val =
QAT_AES_HW_CONFIG_ENC(alg, mode);
}

static int qat_alg_validate_key(int key_len, int *alg)
static int qat_alg_validate_key(int key_len, int *alg, int mode)
{
switch (key_len) {
case AES_KEYSIZE_128:
*alg = ICP_QAT_HW_CIPHER_ALGO_AES128;
break;
case AES_KEYSIZE_192:
*alg = ICP_QAT_HW_CIPHER_ALGO_AES192;
break;
case AES_KEYSIZE_256:
*alg = ICP_QAT_HW_CIPHER_ALGO_AES256;
break;
default:
return -EINVAL;
if (mode != ICP_QAT_HW_CIPHER_XTS_MODE) {
switch (key_len) {
case AES_KEYSIZE_128:
*alg = ICP_QAT_HW_CIPHER_ALGO_AES128;
break;
case AES_KEYSIZE_192:
*alg = ICP_QAT_HW_CIPHER_ALGO_AES192;
break;
case AES_KEYSIZE_256:
*alg = ICP_QAT_HW_CIPHER_ALGO_AES256;
break;
default:
return -EINVAL;
}
} else {
switch (key_len) {
case AES_KEYSIZE_128 << 1:
*alg = ICP_QAT_HW_CIPHER_ALGO_AES128;
break;
case AES_KEYSIZE_256 << 1:
*alg = ICP_QAT_HW_CIPHER_ALGO_AES256;
break;
default:
return -EINVAL;
}
}
return 0;
}

static int qat_alg_aead_init_sessions(struct crypto_aead *tfm,
const uint8_t *key, unsigned int keylen)
static int qat_alg_aead_init_sessions(struct crypto_aead *tfm, const u8 *key,
unsigned int keylen, int mode)
{
struct crypto_authenc_keys keys;
int alg;

if (crypto_authenc_extractkeys(&keys, key, keylen))
goto bad_key;

if (qat_alg_validate_key(keys.enckeylen, &alg))
if (qat_alg_validate_key(keys.enckeylen, &alg, mode))
goto bad_key;

if (qat_alg_aead_init_enc_session(tfm, alg, &keys))
if (qat_alg_aead_init_enc_session(tfm, alg, &keys, mode))
goto error;

if (qat_alg_aead_init_dec_session(tfm, alg, &keys))
if (qat_alg_aead_init_dec_session(tfm, alg, &keys, mode))
goto error;

return 0;
Expand All @@ -534,15 +555,16 @@ static int qat_alg_aead_init_sessions(struct crypto_aead *tfm,

static int qat_alg_ablkcipher_init_sessions(struct qat_alg_ablkcipher_ctx *ctx,
const uint8_t *key,
unsigned int keylen)
unsigned int keylen,
int mode)
{
int alg;

if (qat_alg_validate_key(keylen, &alg))
if (qat_alg_validate_key(keylen, &alg, mode))
goto bad_key;

qat_alg_ablkcipher_init_enc(ctx, alg, key, keylen);
qat_alg_ablkcipher_init_dec(ctx, alg, key, keylen);
qat_alg_ablkcipher_init_enc(ctx, alg, key, keylen, mode);
qat_alg_ablkcipher_init_dec(ctx, alg, key, keylen, mode);
return 0;
bad_key:
crypto_tfm_set_flags(ctx->tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
Expand Down Expand Up @@ -586,7 +608,8 @@ static int qat_alg_aead_setkey(struct crypto_aead *tfm, const uint8_t *key,
goto out_free_enc;
}
}
if (qat_alg_aead_init_sessions(tfm, key, keylen))
if (qat_alg_aead_init_sessions(tfm, key, keylen,
ICP_QAT_HW_CIPHER_CBC_MODE))
goto out_free_all;

return 0;
Expand Down Expand Up @@ -876,8 +899,8 @@ static int qat_alg_aead_enc(struct aead_request *areq)
}

static int qat_alg_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
const uint8_t *key,
unsigned int keylen)
const u8 *key, unsigned int keylen,
int mode)
{
struct qat_alg_ablkcipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct device *dev;
Expand Down Expand Up @@ -918,7 +941,7 @@ static int qat_alg_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
}
}
spin_unlock(&ctx->lock);
if (qat_alg_ablkcipher_init_sessions(ctx, key, keylen))
if (qat_alg_ablkcipher_init_sessions(ctx, key, keylen, mode))
goto out_free_all;

return 0;
Expand All @@ -936,6 +959,27 @@ static int qat_alg_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
return -ENOMEM;
}

static int qat_alg_ablkcipher_cbc_setkey(struct crypto_ablkcipher *tfm,
const u8 *key, unsigned int keylen)
{
return qat_alg_ablkcipher_setkey(tfm, key, keylen,
ICP_QAT_HW_CIPHER_CBC_MODE);
}

static int qat_alg_ablkcipher_ctr_setkey(struct crypto_ablkcipher *tfm,
const u8 *key, unsigned int keylen)
{
return qat_alg_ablkcipher_setkey(tfm, key, keylen,
ICP_QAT_HW_CIPHER_CTR_MODE);
}

static int qat_alg_ablkcipher_xts_setkey(struct crypto_ablkcipher *tfm,
const u8 *key, unsigned int keylen)
{
return qat_alg_ablkcipher_setkey(tfm, key, keylen,
ICP_QAT_HW_CIPHER_XTS_MODE);
}

static int qat_alg_ablkcipher_encrypt(struct ablkcipher_request *req)
{
struct crypto_ablkcipher *atfm = crypto_ablkcipher_reqtfm(req);
Expand Down Expand Up @@ -1171,7 +1215,51 @@ static struct crypto_alg qat_algs[] = { {
.cra_exit = qat_alg_ablkcipher_exit,
.cra_u = {
.ablkcipher = {
.setkey = qat_alg_ablkcipher_setkey,
.setkey = qat_alg_ablkcipher_cbc_setkey,
.decrypt = qat_alg_ablkcipher_decrypt,
.encrypt = qat_alg_ablkcipher_encrypt,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
},
},
}, {
.cra_name = "ctr(aes)",
.cra_driver_name = "qat_aes_ctr",
.cra_priority = 4001,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct qat_alg_ablkcipher_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = qat_alg_ablkcipher_init,
.cra_exit = qat_alg_ablkcipher_exit,
.cra_u = {
.ablkcipher = {
.setkey = qat_alg_ablkcipher_ctr_setkey,
.decrypt = qat_alg_ablkcipher_decrypt,
.encrypt = qat_alg_ablkcipher_encrypt,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
},
},
}, {
.cra_name = "xts(aes)",
.cra_driver_name = "qat_aes_xts",
.cra_priority = 4001,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct qat_alg_ablkcipher_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = qat_alg_ablkcipher_init,
.cra_exit = qat_alg_ablkcipher_exit,
.cra_u = {
.ablkcipher = {
.setkey = qat_alg_ablkcipher_xts_setkey,
.decrypt = qat_alg_ablkcipher_decrypt,
.encrypt = qat_alg_ablkcipher_encrypt,
.min_keysize = AES_MIN_KEY_SIZE,
Expand Down

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