static int crypto_rfc3686_setkey(struct crypto_ablkcipher *parent,
const u8 *key, unsigned int keylen)
{
struct crypto_rfc3686_ctx *ctx = crypto_ablkcipher_ctx(parent);
struct crypto_ablkcipher *child = ctx->child;
int err;
/* the nonce is stored in bytes at end of key */
if (keylen < CTR_RFC3686_NONCE_SIZE)
return -EINVAL;
memcpy(ctx->nonce, key + (keylen - CTR_RFC3686_NONCE_SIZE),
CTR_RFC3686_NONCE_SIZE);
keylen -= CTR_RFC3686_NONCE_SIZE;
crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
CRYPTO_TFM_REQ_MASK);
err = crypto_ablkcipher_setkey(child, key, keylen);
crypto_ablkcipher_set_flags(parent, crypto_ablkcipher_get_flags(child) &
CRYPTO_TFM_RES_MASK);
return err;
}
static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int key_len)
{
struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
int err;
crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
& CRYPTO_TFM_REQ_MASK);
err = crypto_ablkcipher_setkey(child, key, key_len);
crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
& CRYPTO_TFM_RES_MASK);
return err;
}
static int crypto_ccm_setkey(struct crypto_aead *aead, const u8 *key,
unsigned int keylen)
{
struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
struct crypto_ablkcipher *ctr = ctx->ctr;
struct crypto_cipher *tfm = ctx->cipher;
int err = 0;
crypto_ablkcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
crypto_ablkcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
CRYPTO_TFM_REQ_MASK);
err = crypto_ablkcipher_setkey(ctr, key, keylen);
crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) &
CRYPTO_TFM_RES_MASK);
if (err)
goto out;
crypto_cipher_clear_flags(tfm, CRYPTO_TFM_REQ_MASK);
crypto_cipher_set_flags(tfm, crypto_aead_get_flags(aead) &
CRYPTO_TFM_REQ_MASK);
err = crypto_cipher_setkey(tfm, key, keylen);
crypto_aead_set_flags(aead, crypto_cipher_get_flags(tfm) &
CRYPTO_TFM_RES_MASK);
out:
return err;
}
static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
const u8 *key, unsigned int keylen)
{
struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
struct crypto_blkcipher *child = ctx->child;
int err;
crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
CRYPTO_TFM_REQ_MASK);
err = crypto_blkcipher_setkey(child, key, keylen);
crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
CRYPTO_TFM_RES_MASK);
return err;
}
static int qce_ablkcipher_setkey(struct crypto_ablkcipher *ablk, const u8 *key,
unsigned int keylen)
{
struct crypto_tfm *tfm = crypto_ablkcipher_tfm(ablk);
struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
unsigned long flags = to_cipher_tmpl(tfm)->alg_flags;
int ret;
if (!key || !keylen)
return -EINVAL;
if (IS_AES(flags)) {
switch (keylen) {
case AES_KEYSIZE_128:
case AES_KEYSIZE_256:
break;
default:
goto fallback;
}
} else if (IS_DES(flags)) {
u32 tmp[DES_EXPKEY_WORDS];
ret = des_ekey(tmp, key);
if (!ret && crypto_ablkcipher_get_flags(ablk) &
CRYPTO_TFM_REQ_WEAK_KEY)
goto weakkey;
}
ctx->enc_keylen = keylen;
memcpy(ctx->enc_key, key, keylen);
return 0;
fallback:
ret = crypto_sync_skcipher_setkey(ctx->fallback, key, keylen);
if (!ret)
ctx->enc_keylen = keylen;
return ret;
weakkey:
crypto_ablkcipher_set_flags(ablk, CRYPTO_TFM_RES_WEAK_KEY);
return -EINVAL;
}
static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
unsigned int keylen)
{
struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
struct crypto_ahash *ghash = ctx->ghash;
struct crypto_ablkcipher *ctr = ctx->ctr;
struct {
be128 hash;
u8 iv[8];
struct crypto_gcm_setkey_result result;
struct scatterlist sg[1];
struct ablkcipher_request req;
} *data;
int err;
crypto_ablkcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
crypto_ablkcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
CRYPTO_TFM_REQ_MASK);
err = crypto_ablkcipher_setkey(ctr, key, keylen);
if (err)
return err;
crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) &
CRYPTO_TFM_RES_MASK);
data = kzalloc(sizeof(*data) + crypto_ablkcipher_reqsize(ctr),
GFP_KERNEL);
if (!data)
return -ENOMEM;
init_completion(&data->result.completion);
sg_init_one(data->sg, &data->hash, sizeof(data->hash));
ablkcipher_request_set_tfm(&data->req, ctr);
ablkcipher_request_set_callback(&data->req, CRYPTO_TFM_REQ_MAY_SLEEP |
CRYPTO_TFM_REQ_MAY_BACKLOG,
crypto_gcm_setkey_done,
&data->result);
ablkcipher_request_set_crypt(&data->req, data->sg, data->sg,
sizeof(data->hash), data->iv);
err = crypto_ablkcipher_encrypt(&data->req);
if (err == -EINPROGRESS || err == -EBUSY) {
err = wait_for_completion_interruptible(
&data->result.completion);
if (!err)
err = data->result.err;
}
if (err)
goto out;
crypto_ahash_clear_flags(ghash, CRYPTO_TFM_REQ_MASK);
crypto_ahash_set_flags(ghash, crypto_aead_get_flags(aead) &
CRYPTO_TFM_REQ_MASK);
err = crypto_ahash_setkey(ghash, (u8 *)&data->hash, sizeof(be128));
crypto_aead_set_flags(aead, crypto_ahash_get_flags(ghash) &
CRYPTO_TFM_RES_MASK);
out:
kfree(data);
return err;
}
static int skcipher_crypt_blkcipher(struct skcipher_request *req,
int (*crypt)(struct blkcipher_desc *,
struct scatterlist *,
struct scatterlist *,
unsigned int))
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_blkcipher **ctx = crypto_skcipher_ctx(tfm);
struct blkcipher_desc desc = {
.tfm = *ctx,
.info = req->iv,
.flags = req->base.flags,
};
return crypt(&desc, req->dst, req->src, req->cryptlen);
}
static int skcipher_encrypt_blkcipher(struct skcipher_request *req)
{
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
return skcipher_crypt_blkcipher(req, alg->encrypt);
}
static int skcipher_decrypt_blkcipher(struct skcipher_request *req)
{
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
return skcipher_crypt_blkcipher(req, alg->decrypt);
}
static void crypto_exit_skcipher_ops_blkcipher(struct crypto_tfm *tfm)
{
struct crypto_blkcipher **ctx = crypto_tfm_ctx(tfm);
crypto_free_blkcipher(*ctx);
}
static int crypto_init_skcipher_ops_blkcipher(struct crypto_tfm *tfm)
{
struct crypto_alg *calg = tfm->__crt_alg;
struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
struct crypto_blkcipher **ctx = crypto_tfm_ctx(tfm);
struct crypto_blkcipher *blkcipher;
struct crypto_tfm *btfm;
if (!crypto_mod_get(calg))
return -EAGAIN;
btfm = __crypto_alloc_tfm(calg, CRYPTO_ALG_TYPE_BLKCIPHER,
CRYPTO_ALG_TYPE_MASK);
if (IS_ERR(btfm)) {
crypto_mod_put(calg);
return PTR_ERR(btfm);
}
blkcipher = __crypto_blkcipher_cast(btfm);
*ctx = blkcipher;
tfm->exit = crypto_exit_skcipher_ops_blkcipher;
skcipher->setkey = skcipher_setkey_blkcipher;
skcipher->encrypt = skcipher_encrypt_blkcipher;
skcipher->decrypt = skcipher_decrypt_blkcipher;
skcipher->ivsize = crypto_blkcipher_ivsize(blkcipher);
skcipher->keysize = calg->cra_blkcipher.max_keysize;
return 0;
}
static int skcipher_setkey_ablkcipher(struct crypto_skcipher *tfm,
const u8 *key, unsigned int keylen)
{
struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
struct crypto_ablkcipher *ablkcipher = *ctx;
int err;
crypto_ablkcipher_clear_flags(ablkcipher, ~0);
crypto_ablkcipher_set_flags(ablkcipher,
crypto_skcipher_get_flags(tfm) &
CRYPTO_TFM_REQ_MASK);
err = crypto_ablkcipher_setkey(ablkcipher, key, keylen);
crypto_skcipher_set_flags(tfm,
crypto_ablkcipher_get_flags(ablkcipher) &
CRYPTO_TFM_RES_MASK);
return err;
}
static int skcipher_crypt_ablkcipher(struct skcipher_request *req,
int (*crypt)(struct ablkcipher_request *))
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
struct ablkcipher_request *subreq = skcipher_request_ctx(req);
ablkcipher_request_set_tfm(subreq, *ctx);
ablkcipher_request_set_callback(subreq, skcipher_request_flags(req),
req->base.complete, req->base.data);
ablkcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
req->iv);
return crypt(subreq);
}
static int skcipher_encrypt_ablkcipher(struct skcipher_request *req)
{
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
return skcipher_crypt_ablkcipher(req, alg->encrypt);
}
static int skcipher_decrypt_ablkcipher(struct skcipher_request *req)
{
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
return skcipher_crypt_ablkcipher(req, alg->decrypt);
}
static void crypto_exit_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
{
struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
crypto_free_ablkcipher(*ctx);
}
static int crypto_init_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
{
struct crypto_alg *calg = tfm->__crt_alg;
struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
struct crypto_ablkcipher *ablkcipher;
struct crypto_tfm *abtfm;
if (!crypto_mod_get(calg))
return -EAGAIN;
abtfm = __crypto_alloc_tfm(calg, 0, 0);
if (IS_ERR(abtfm)) {
crypto_mod_put(calg);
return PTR_ERR(abtfm);
}
ablkcipher = __crypto_ablkcipher_cast(abtfm);
*ctx = ablkcipher;
tfm->exit = crypto_exit_skcipher_ops_ablkcipher;
skcipher->setkey = skcipher_setkey_ablkcipher;
skcipher->encrypt = skcipher_encrypt_ablkcipher;
skcipher->decrypt = skcipher_decrypt_ablkcipher;
skcipher->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
skcipher->reqsize = crypto_ablkcipher_reqsize(ablkcipher) +
sizeof(struct ablkcipher_request);
skcipher->keysize = calg->cra_ablkcipher.max_keysize;
return 0;
}
static int crypto_skcipher_init_tfm(struct crypto_tfm *tfm)
{
if (tfm->__crt_alg->cra_type == &crypto_blkcipher_type)
return crypto_init_skcipher_ops_blkcipher(tfm);
BUG_ON(tfm->__crt_alg->cra_type != &crypto_ablkcipher_type &&
tfm->__crt_alg->cra_type != &crypto_givcipher_type);
return crypto_init_skcipher_ops_ablkcipher(tfm);
}
static const struct crypto_type crypto_skcipher_type2 = {
.extsize = crypto_skcipher_extsize,
.init_tfm = crypto_skcipher_init_tfm,
.maskclear = ~CRYPTO_ALG_TYPE_MASK,
.maskset = CRYPTO_ALG_TYPE_BLKCIPHER_MASK,
.type = CRYPTO_ALG_TYPE_BLKCIPHER,
.tfmsize = offsetof(struct crypto_skcipher, base),
};
struct crypto_skcipher *crypto_alloc_skcipher(const char *alg_name,
u32 type, u32 mask)
{
return crypto_alloc_tfm(alg_name, &crypto_skcipher_type2, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_alloc_skcipher);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Symmetric key cipher type");
static int test_acipher(const char *algo, int enc, char *data_in,
char *data_out, size_t data_len, char *key, int keysize)
{
struct crypto_ablkcipher *tfm;
struct tcrypt_result tresult;
struct ablkcipher_request *req;
struct scatterlist sg[TVMEMSIZE];
unsigned int ret, i, j, iv_len;
char iv[128];
ret = -EAGAIN;
init_completion(&tresult.completion);
tfm = crypto_alloc_ablkcipher(algo, 0, 0);
if (IS_ERR(tfm)) {
printk(KERN_ERR "failed to load transform for %s: %ld\n",
algo, PTR_ERR(tfm));
return ret;
}
req = ablkcipher_request_alloc(tfm, GFP_KERNEL);
if (!req) {
printk(KERN_ERR "tcrypt: skcipher: Failed to allocate request for %s\n",
algo);
goto out;
}
ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
tcrypt_complete, &tresult);
crypto_ablkcipher_clear_flags(tfm, ~0);
ret = crypto_ablkcipher_setkey(tfm, key, keysize);
if (ret) {
printk(KERN_ERR "setkey() failed flags=%x\n",
crypto_ablkcipher_get_flags(tfm));
goto out_free_req;
}
printk(KERN_INFO "KEY:\n");
hexdump(key, keysize);
sg_init_table(sg, TVMEMSIZE);
i = 0;
j = data_len;
while (j > PAGE_SIZE) {
sg_set_buf(sg + i, tvmem[i], PAGE_SIZE);
memcpy(tvmem[i], data_in + i * PAGE_SIZE, PAGE_SIZE);
i++;
j -= PAGE_SIZE;
}
sg_set_buf(sg + i, tvmem[i], j);
memcpy(tvmem[i], data_in + i * PAGE_SIZE, j);
iv_len = crypto_ablkcipher_ivsize(tfm);
memcpy(iv, iv16, iv_len);
printk(KERN_INFO "IV:\n");
hexdump(iv, iv_len);
ablkcipher_request_set_crypt(req, sg, sg, data_len, iv);
printk(KERN_INFO "IN:\n");
hexdump(data_in, data_len);
if (enc)
ret = do_one_acipher_op(req, crypto_ablkcipher_encrypt(req));
else
ret = do_one_acipher_op(req, crypto_ablkcipher_decrypt(req));
if (ret)
printk(KERN_ERR "failed flags=%x\n",
crypto_ablkcipher_get_flags(tfm));
else {
i = 0;
j = data_len;
while (j > PAGE_SIZE) {
memcpy(data_out + i * PAGE_SIZE, tvmem[i], PAGE_SIZE);
i++;
j -= PAGE_SIZE;
}
memcpy(data_out + i * PAGE_SIZE, tvmem[i], j);
printk(KERN_INFO "OUT:\n");
hexdump(data_out, data_len);
}
out_free_req:
ablkcipher_request_free(req);
out:
crypto_free_ablkcipher(tfm);
return ret;
}