int rtl_cipher_init_ctx(struct crypto_tfm *tfm,
struct rtl_cipher_ctx *ctx)
{
const char *algname = crypto_tfm_alg_name(tfm);
memset(ctx, 0, sizeof(*ctx));
if (strcmp(algname, "cbc(des)") == 0)
ctx->mode = 0x00;
else if (strcmp(algname, "cbc(des3_ede)") == 0)
ctx->mode = 0x01;
else if (strcmp(algname, "ecb(des)") == 0)
ctx->mode = 0x02;
else if (strcmp(algname, "ecb(des3_ede)") == 0)
ctx->mode = 0x03;
else if (strcmp(algname, "cbc(aes)") == 0)
ctx->mode = 0x20;
else if (strcmp(algname, "ecb(aes)") == 0)
ctx->mode = 0x22;
else if (strcmp(algname, "ctr(aes)") == 0)
ctx->mode = 0x23;
else
ctx->mode = -1;
#ifdef CONFIG_RTK_VOIP_DBG
printk("%s: alg=%s, driver=%s, mode=%x\n", __FUNCTION__,
crypto_tfm_alg_name(tfm),
crypto_tfm_alg_driver_name(tfm),
ctx->mode
);
#endif
ctx->aes_dekey = &ctx->__aes_dekey[32]; // cache align issue
return 0;
}
static int p8_ghash_init_tfm(struct crypto_tfm *tfm)
{
const char *alg;
struct crypto_shash *fallback;
struct crypto_shash *shash_tfm = __crypto_shash_cast(tfm);
struct p8_ghash_ctx *ctx = crypto_tfm_ctx(tfm);
if (!(alg = crypto_tfm_alg_name(tfm))) {
printk(KERN_ERR "Failed to get algorithm name.\n");
return -ENOENT;
}
fallback = crypto_alloc_shash(alg, 0 ,CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(fallback)) {
printk(KERN_ERR "Failed to allocate transformation for '%s': %ld\n",
alg, PTR_ERR(fallback));
return PTR_ERR(fallback);
}
printk(KERN_INFO "Using '%s' as fallback implementation.\n",
crypto_tfm_alg_driver_name(crypto_shash_tfm(fallback)));
crypto_shash_set_flags(fallback,
crypto_shash_get_flags((struct crypto_shash *) tfm));
ctx->fallback = fallback;
shash_tfm->descsize = sizeof(struct p8_ghash_desc_ctx)
+ crypto_shash_descsize(fallback);
return 0;
}
static void cc_cipher_exit(struct crypto_tfm *tfm)
{
struct cc_cipher_ctx *ctx_p = crypto_tfm_ctx(tfm);
struct device *dev = drvdata_to_dev(ctx_p->drvdata);
unsigned int max_key_buf_size = get_max_keysize(tfm);
dev_dbg(dev, "Clearing context @%p for %s\n",
crypto_tfm_ctx(tfm), crypto_tfm_alg_name(tfm));
if (ctx_p->cipher_mode == DRV_CIPHER_ESSIV) {
/* Free hash tfm for essiv */
crypto_free_shash(ctx_p->shash_tfm);
ctx_p->shash_tfm = NULL;
}
/* Unmap key buffer */
dma_unmap_single(dev, ctx_p->user.key_dma_addr, max_key_buf_size,
DMA_TO_DEVICE);
dev_dbg(dev, "Unmapped key buffer key_dma_addr=%pad\n",
&ctx_p->user.key_dma_addr);
/* Free key buffer in context */
kfree(ctx_p->user.key);
dev_dbg(dev, "Free key buffer in context. key=@%p\n", ctx_p->user.key);
}
static int rk_cra_hash_init(struct crypto_tfm *tfm)
{
struct rk_ahash_ctx *tctx = crypto_tfm_ctx(tfm);
struct rk_crypto_tmp *algt;
struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg);
const char *alg_name = crypto_tfm_alg_name(tfm);
algt = container_of(alg, struct rk_crypto_tmp, alg.hash);
tctx->dev = algt->dev;
tctx->dev->addr_vir = (void *)__get_free_page(GFP_KERNEL);
if (!tctx->dev->addr_vir) {
dev_err(tctx->dev->dev, "failed to kmalloc for addr_vir\n");
return -ENOMEM;
}
tctx->dev->start = rk_ahash_start;
tctx->dev->update = rk_ahash_crypto_rx;
tctx->dev->complete = rk_ahash_crypto_complete;
/* for fallback */
tctx->fallback_tfm = crypto_alloc_ahash(alg_name, 0,
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(tctx->fallback_tfm)) {
dev_err(tctx->dev->dev, "Could not load fallback driver.\n");
return PTR_ERR(tctx->fallback_tfm);
}
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct rk_ahash_rctx) +
crypto_ahash_reqsize(tctx->fallback_tfm));
return tctx->dev->enable_clk(tctx->dev);
}
static int p8_aes_xts_init(struct crypto_tfm *tfm)
{
const char *alg;
struct crypto_skcipher *fallback;
struct p8_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
if (!(alg = crypto_tfm_alg_name(tfm))) {
printk(KERN_ERR "Failed to get algorithm name.\n");
return -ENOENT;
}
fallback = crypto_alloc_skcipher(alg, 0,
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(fallback)) {
printk(KERN_ERR
"Failed to allocate transformation for '%s': %ld\n",
alg, PTR_ERR(fallback));
return PTR_ERR(fallback);
}
printk(KERN_INFO "Using '%s' as fallback implementation.\n",
crypto_skcipher_driver_name(fallback));
crypto_skcipher_set_flags(
fallback,
crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
ctx->fallback = fallback;
return 0;
}
static int qce_ablkcipher_init(struct crypto_tfm *tfm)
{
struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
memset(ctx, 0, sizeof(*ctx));
tfm->crt_ablkcipher.reqsize = sizeof(struct qce_cipher_reqctx);
ctx->fallback = crypto_alloc_sync_skcipher(crypto_tfm_alg_name(tfm),
0, CRYPTO_ALG_NEED_FALLBACK);
return PTR_ERR_OR_ZERO(ctx->fallback);
}
static int cc_cipher_init(struct crypto_tfm *tfm)
{
struct cc_cipher_ctx *ctx_p = crypto_tfm_ctx(tfm);
struct crypto_alg *alg = tfm->__crt_alg;
struct cc_crypto_alg *cc_alg =
container_of(alg, struct cc_crypto_alg, crypto_alg);
struct device *dev = drvdata_to_dev(cc_alg->drvdata);
int rc = 0;
unsigned int max_key_buf_size = get_max_keysize(tfm);
struct ablkcipher_tfm *ablktfm = &tfm->crt_ablkcipher;
dev_dbg(dev, "Initializing context @%p for %s\n", ctx_p,
crypto_tfm_alg_name(tfm));
ablktfm->reqsize = sizeof(struct blkcipher_req_ctx);
ctx_p->cipher_mode = cc_alg->cipher_mode;
ctx_p->flow_mode = cc_alg->flow_mode;
ctx_p->drvdata = cc_alg->drvdata;
/* Allocate key buffer, cache line aligned */
ctx_p->user.key = kmalloc(max_key_buf_size, GFP_KERNEL);
if (!ctx_p->user.key)
return -ENOMEM;
dev_dbg(dev, "Allocated key buffer in context. key=@%p\n",
ctx_p->user.key);
/* Map key buffer */
ctx_p->user.key_dma_addr = dma_map_single(dev, (void *)ctx_p->user.key,
max_key_buf_size,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, ctx_p->user.key_dma_addr)) {
dev_err(dev, "Mapping Key %u B at va=%pK for DMA failed\n",
max_key_buf_size, ctx_p->user.key);
return -ENOMEM;
}
dev_dbg(dev, "Mapped key %u B at va=%pK to dma=%pad\n",
max_key_buf_size, ctx_p->user.key, &ctx_p->user.key_dma_addr);
if (ctx_p->cipher_mode == DRV_CIPHER_ESSIV) {
/* Alloc hash tfm for essiv */
ctx_p->shash_tfm = crypto_alloc_shash("sha256-generic", 0, 0);
if (IS_ERR(ctx_p->shash_tfm)) {
dev_err(dev, "Error allocating hash tfm for ESSIV.\n");
return PTR_ERR(ctx_p->shash_tfm);
}
}
return rc;
}
int rtl_hash_init_ctx(struct crypto_tfm *tfm, struct rtl_hash_ctx *ctx)
{
const char *algname = crypto_tfm_alg_name(tfm);
if (strcmp(algname, "md5") == 0)
ctx->mode = 0x00;
else if (strcmp(algname, "sha1") == 0)
ctx->mode = 0x01;
else
ctx->mode = -1;
ctx->data = (u8 *) kmalloc(MAX_PKTLEN, GFP_KERNEL);
ctx->length = 0;
return 0;
}
static int qce_ablkcipher_init(struct crypto_tfm *tfm)
{
struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
memset(ctx, 0, sizeof(*ctx));
tfm->crt_ablkcipher.reqsize = sizeof(struct qce_cipher_reqctx);
ctx->fallback = crypto_alloc_ablkcipher(crypto_tfm_alg_name(tfm),
CRYPTO_ALG_TYPE_ABLKCIPHER,
CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->fallback))
return PTR_ERR(ctx->fallback);
return 0;
}
static int sahara_aes_cra_init(struct crypto_tfm *tfm)
{
const char *name = crypto_tfm_alg_name(tfm);
struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
ctx->fallback = crypto_alloc_ablkcipher(name, 0,
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->fallback)) {
pr_err("Error allocating fallback algo %s\n", name);
return PTR_ERR(ctx->fallback);
}
tfm->crt_ablkcipher.reqsize = sizeof(struct sahara_aes_reqctx);
return 0;
}
static int sahara_sha_cra_init(struct crypto_tfm *tfm)
{
const char *name = crypto_tfm_alg_name(tfm);
struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
ctx->shash_fallback = crypto_alloc_shash(name, 0,
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->shash_fallback)) {
pr_err("Error allocating fallback algo %s\n", name);
return PTR_ERR(ctx->shash_fallback);
}
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct sahara_sha_reqctx) +
SHA_BUFFER_LEN + SHA256_BLOCK_SIZE);
return 0;
}
static int p8_aes_ctr_init(struct crypto_tfm *tfm)
{
const char *alg = crypto_tfm_alg_name(tfm);
struct crypto_sync_skcipher *fallback;
struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm);
fallback = crypto_alloc_sync_skcipher(alg, 0,
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(fallback)) {
printk(KERN_ERR
"Failed to allocate transformation for '%s': %ld\n",
alg, PTR_ERR(fallback));
return PTR_ERR(fallback);
}
crypto_sync_skcipher_set_flags(
fallback,
crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
ctx->fallback = fallback;
return 0;
}
int crypto_init_cipher_ops(struct crypto_tfm *tfm)
{
int ret = 0;
struct cipher_tfm *ops = &tfm->crt_cipher;
ops->cit_setkey = setkey;
switch (tfm->crt_cipher.cit_mode) {
case CRYPTO_TFM_MODE_ECB:
ops->cit_encrypt = ecb_encrypt;
ops->cit_decrypt = ecb_decrypt;
break;
case CRYPTO_TFM_MODE_CBC:
ops->cit_encrypt = cbc_encrypt;
ops->cit_decrypt = cbc_decrypt;
ops->cit_encrypt_iv = cbc_encrypt_iv;
ops->cit_decrypt_iv = cbc_decrypt_iv;
break;
case CRYPTO_TFM_MODE_CFB:
ops->cit_encrypt = nocrypt;
ops->cit_decrypt = nocrypt;
ops->cit_encrypt_iv = nocrypt_iv;
ops->cit_decrypt_iv = nocrypt_iv;
break;
case CRYPTO_TFM_MODE_CTR:
ops->cit_encrypt = nocrypt;
ops->cit_decrypt = nocrypt;
ops->cit_encrypt_iv = nocrypt_iv;
ops->cit_decrypt_iv = nocrypt_iv;
break;
default:
BUG();
}
if (ops->cit_mode == CRYPTO_TFM_MODE_CBC) {
unsigned long align;
unsigned long addr;
switch (crypto_tfm_alg_blocksize(tfm)) {
case 8:
ops->cit_xor_block = xor_64;
break;
case 16:
ops->cit_xor_block = xor_128;
break;
default:
printk(KERN_WARNING "%s: block size %u not supported\n",
crypto_tfm_alg_name(tfm),
crypto_tfm_alg_blocksize(tfm));
ret = -EINVAL;
goto out;
}
ops->cit_ivsize = crypto_tfm_alg_blocksize(tfm);
align = crypto_tfm_alg_alignmask(tfm) + 1;
addr = (unsigned long)crypto_tfm_ctx(tfm);
addr = ALIGN(addr, align);
addr += ALIGN(tfm->__crt_alg->cra_ctxsize, align);
ops->cit_iv = (void *)addr;
#ifdef CONFIG_CRYPTO_XCBC
ret = crypto_alloc_xcbc_block(tfm);
#endif
}
out:
return ret;
}
static int cc_cipher_sethkey(struct crypto_skcipher *sktfm, const u8 *key,
unsigned int keylen)
{
struct crypto_tfm *tfm = crypto_skcipher_tfm(sktfm);
struct cc_cipher_ctx *ctx_p = crypto_tfm_ctx(tfm);
struct device *dev = drvdata_to_dev(ctx_p->drvdata);
struct cc_hkey_info hki;
dev_dbg(dev, "Setting HW key in context @%p for %s. keylen=%u\n",
ctx_p, crypto_tfm_alg_name(tfm), keylen);
dump_byte_array("key", (u8 *)key, keylen);
/* STAT_PHASE_0: Init and sanity checks */
/* This check the size of the hardware key token */
if (keylen != sizeof(hki)) {
dev_err(dev, "Unsupported HW key size %d.\n", keylen);
crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
if (ctx_p->flow_mode != S_DIN_to_AES) {
dev_err(dev, "HW key not supported for non-AES flows\n");
return -EINVAL;
}
memcpy(&hki, key, keylen);
/* The real key len for crypto op is the size of the HW key
* referenced by the HW key slot, not the hardware key token
*/
keylen = hki.keylen;
if (validate_keys_sizes(ctx_p, keylen)) {
dev_err(dev, "Unsupported key size %d.\n", keylen);
crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
ctx_p->hw.key1_slot = cc_slot_to_hw_key(hki.hw_key1);
if (ctx_p->hw.key1_slot == END_OF_KEYS) {
dev_err(dev, "Unsupported hw key1 number (%d)\n", hki.hw_key1);
return -EINVAL;
}
if (ctx_p->cipher_mode == DRV_CIPHER_XTS ||
ctx_p->cipher_mode == DRV_CIPHER_ESSIV ||
ctx_p->cipher_mode == DRV_CIPHER_BITLOCKER) {
if (hki.hw_key1 == hki.hw_key2) {
dev_err(dev, "Illegal hw key numbers (%d,%d)\n",
hki.hw_key1, hki.hw_key2);
return -EINVAL;
}
ctx_p->hw.key2_slot = cc_slot_to_hw_key(hki.hw_key2);
if (ctx_p->hw.key2_slot == END_OF_KEYS) {
dev_err(dev, "Unsupported hw key2 number (%d)\n",
hki.hw_key2);
return -EINVAL;
}
}
ctx_p->keylen = keylen;
ctx_p->hw_key = true;
dev_dbg(dev, "cc_is_hw_key ret 0");
return 0;
}
static int cc_cipher_setkey(struct crypto_skcipher *sktfm, const u8 *key,
unsigned int keylen)
{
struct crypto_tfm *tfm = crypto_skcipher_tfm(sktfm);
struct cc_cipher_ctx *ctx_p = crypto_tfm_ctx(tfm);
struct device *dev = drvdata_to_dev(ctx_p->drvdata);
u32 tmp[DES3_EDE_EXPKEY_WORDS];
struct cc_crypto_alg *cc_alg =
container_of(tfm->__crt_alg, struct cc_crypto_alg,
skcipher_alg.base);
unsigned int max_key_buf_size = cc_alg->skcipher_alg.max_keysize;
dev_dbg(dev, "Setting key in context @%p for %s. keylen=%u\n",
ctx_p, crypto_tfm_alg_name(tfm), keylen);
dump_byte_array("key", (u8 *)key, keylen);
/* STAT_PHASE_0: Init and sanity checks */
if (validate_keys_sizes(ctx_p, keylen)) {
dev_err(dev, "Unsupported key size %d.\n", keylen);
crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
ctx_p->hw_key = false;
/*
* Verify DES weak keys
* Note that we're dropping the expanded key since the
* HW does the expansion on its own.
*/
if (ctx_p->flow_mode == S_DIN_to_DES) {
if (keylen == DES3_EDE_KEY_SIZE &&
__des3_ede_setkey(tmp, &tfm->crt_flags, key,
DES3_EDE_KEY_SIZE)) {
dev_dbg(dev, "weak 3DES key");
return -EINVAL;
} else if (!des_ekey(tmp, key) &&
(crypto_tfm_get_flags(tfm) &
CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) {
tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
dev_dbg(dev, "weak DES key");
return -EINVAL;
}
}
if (ctx_p->cipher_mode == DRV_CIPHER_XTS &&
xts_check_key(tfm, key, keylen)) {
dev_dbg(dev, "weak XTS key");
return -EINVAL;
}
/* STAT_PHASE_1: Copy key to ctx */
dma_sync_single_for_cpu(dev, ctx_p->user.key_dma_addr,
max_key_buf_size, DMA_TO_DEVICE);
memcpy(ctx_p->user.key, key, keylen);
if (keylen == 24)
memset(ctx_p->user.key + 24, 0, CC_AES_KEY_SIZE_MAX - 24);
if (ctx_p->cipher_mode == DRV_CIPHER_ESSIV) {
/* sha256 for key2 - use sw implementation */
int key_len = keylen >> 1;
int err;
SHASH_DESC_ON_STACK(desc, ctx_p->shash_tfm);
desc->tfm = ctx_p->shash_tfm;
err = crypto_shash_digest(desc, ctx_p->user.key, key_len,
ctx_p->user.key + key_len);
if (err) {
dev_err(dev, "Failed to hash ESSIV key.\n");
return err;
}
}
static inline const char *crypto_ahash_alg_name(struct crypto_ahash *tfm)
{
return crypto_tfm_alg_name(crypto_ahash_tfm(tfm));
}
static int cc_cipher_setkey(struct crypto_ablkcipher *atfm, const u8 *key,
unsigned int keylen)
{
struct crypto_tfm *tfm = crypto_ablkcipher_tfm(atfm);
struct cc_cipher_ctx *ctx_p = crypto_tfm_ctx(tfm);
struct device *dev = drvdata_to_dev(ctx_p->drvdata);
u32 tmp[DES_EXPKEY_WORDS];
unsigned int max_key_buf_size = get_max_keysize(tfm);
dev_dbg(dev, "Setting key in context @%p for %s. keylen=%u\n",
ctx_p, crypto_tfm_alg_name(tfm), keylen);
dump_byte_array("key", (u8 *)key, keylen);
/* STAT_PHASE_0: Init and sanity checks */
if (validate_keys_sizes(ctx_p, keylen)) {
dev_err(dev, "Unsupported key size %d.\n", keylen);
crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
if (cc_is_hw_key(tfm)) {
/* setting HW key slots */
struct arm_hw_key_info *hki = (struct arm_hw_key_info *)key;
if (ctx_p->flow_mode != S_DIN_to_AES) {
dev_err(dev, "HW key not supported for non-AES flows\n");
return -EINVAL;
}
ctx_p->hw.key1_slot = hw_key_to_cc_hw_key(hki->hw_key1);
if (ctx_p->hw.key1_slot == END_OF_KEYS) {
dev_err(dev, "Unsupported hw key1 number (%d)\n",
hki->hw_key1);
return -EINVAL;
}
if (ctx_p->cipher_mode == DRV_CIPHER_XTS ||
ctx_p->cipher_mode == DRV_CIPHER_ESSIV ||
ctx_p->cipher_mode == DRV_CIPHER_BITLOCKER) {
if (hki->hw_key1 == hki->hw_key2) {
dev_err(dev, "Illegal hw key numbers (%d,%d)\n",
hki->hw_key1, hki->hw_key2);
return -EINVAL;
}
ctx_p->hw.key2_slot =
hw_key_to_cc_hw_key(hki->hw_key2);
if (ctx_p->hw.key2_slot == END_OF_KEYS) {
dev_err(dev, "Unsupported hw key2 number (%d)\n",
hki->hw_key2);
return -EINVAL;
}
}
ctx_p->keylen = keylen;
dev_dbg(dev, "cc_is_hw_key ret 0");
return 0;
}
// verify weak keys
if (ctx_p->flow_mode == S_DIN_to_DES) {
if (!des_ekey(tmp, key) &&
(crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_WEAK_KEY)) {
tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
dev_dbg(dev, "weak DES key");
return -EINVAL;
}
}
if (ctx_p->cipher_mode == DRV_CIPHER_XTS &&
xts_check_key(tfm, key, keylen)) {
dev_dbg(dev, "weak XTS key");
return -EINVAL;
}
if (ctx_p->flow_mode == S_DIN_to_DES &&
keylen == DES3_EDE_KEY_SIZE &&
cc_verify_3des_keys(key, keylen)) {
dev_dbg(dev, "weak 3DES key");
return -EINVAL;
}
/* STAT_PHASE_1: Copy key to ctx */
dma_sync_single_for_cpu(dev, ctx_p->user.key_dma_addr,
max_key_buf_size, DMA_TO_DEVICE);
memcpy(ctx_p->user.key, key, keylen);
if (keylen == 24)
memset(ctx_p->user.key + 24, 0, CC_AES_KEY_SIZE_MAX - 24);
if (ctx_p->cipher_mode == DRV_CIPHER_ESSIV) {
/* sha256 for key2 - use sw implementation */
int key_len = keylen >> 1;
int err;
SHASH_DESC_ON_STACK(desc, ctx_p->shash_tfm);
desc->tfm = ctx_p->shash_tfm;
err = crypto_shash_digest(desc, ctx_p->user.key, key_len,
ctx_p->user.key + key_len);
if (err) {
dev_err(dev, "Failed to hash ESSIV key.\n");
return err;
}
}
int crypto_init_cipher_ops(struct crypto_tfm *tfm)
{
int ret = 0;
struct cipher_tfm *ops = &tfm->crt_cipher;
ops->cit_setkey = setkey;
switch (tfm->crt_cipher.cit_mode) {
case CRYPTO_TFM_MODE_ECB:
ops->cit_encrypt = ecb_encrypt;
ops->cit_decrypt = ecb_decrypt;
break;
case CRYPTO_TFM_MODE_CBC:
ops->cit_encrypt = cbc_encrypt;
ops->cit_decrypt = cbc_decrypt;
ops->cit_encrypt_iv = cbc_encrypt_iv;
ops->cit_decrypt_iv = cbc_decrypt_iv;
break;
case CRYPTO_TFM_MODE_CFB:
ops->cit_encrypt = nocrypt;
ops->cit_decrypt = nocrypt;
ops->cit_encrypt_iv = nocrypt_iv;
ops->cit_decrypt_iv = nocrypt_iv;
break;
case CRYPTO_TFM_MODE_CTR:
ops->cit_encrypt = nocrypt;
ops->cit_decrypt = nocrypt;
ops->cit_encrypt_iv = nocrypt_iv;
ops->cit_decrypt_iv = nocrypt_iv;
break;
default:
BUG();
}
if (ops->cit_mode == CRYPTO_TFM_MODE_CBC) {
switch (crypto_tfm_alg_blocksize(tfm)) {
case 8:
ops->cit_xor_block = xor_64;
break;
case 16:
ops->cit_xor_block = xor_128;
break;
default:
printk(KERN_WARNING "%s: block size %u not supported\n",
crypto_tfm_alg_name(tfm),
crypto_tfm_alg_blocksize(tfm));
ret = -EINVAL;
goto out;
}
ops->cit_ivsize = crypto_tfm_alg_blocksize(tfm);
ops->cit_iv = kmalloc(ops->cit_ivsize, GFP_KERNEL);
if (ops->cit_iv == NULL)
ret = -ENOMEM;
}
out:
return ret;
}
