int crypto_get_default_rng(void)
{
struct crypto_rng *rng;
int err;
mutex_lock(&crypto_default_rng_lock);
if (!crypto_default_rng) {
rng = crypto_alloc_rng("stdrng", 0, 0);
err = PTR_ERR(rng);
if (IS_ERR(rng))
goto unlock;
err = crypto_rng_reset(rng, NULL, crypto_rng_seedsize(rng));
if (err) {
crypto_free_rng(rng);
goto unlock;
}
crypto_default_rng = rng;
}
crypto_default_rng_refcnt++;
err = 0;
unlock:
mutex_unlock(&crypto_default_rng_lock);
return err;
}
int cryptodev_rng_init(struct rng_data *rdata, const char *alg_name,
void *key, size_t keylen)
{
int ret;
rdata->s = crypto_alloc_rng(alg_name, 0, 0);
if (unlikely(IS_ERR(rdata->s))) {
ddebug(1, "Failed to load transform for %s", alg_name);
return -EINVAL;
}
/* Copy the key from user and set to TFM. */
ret = crypto_rng_reset(rdata->s, key, keylen);
if (unlikely(ret)) {
ddebug(1, "Seeding failed for %s-%zu.",
alg_name, keylen*8);
ret = -EINVAL;
goto error;
}
rdata->seedsize = crypto_rng_seedsize(rdata->s);
rdata->init = 1;
return 0;
error:
crypto_free_rng(rdata->s);
return ret;
}
/*
* Initialize big_key crypto and RNG algorithms
*/
static int __init big_key_crypto_init(void)
{
int ret = -EINVAL;
/* init RNG */
big_key_rng = crypto_alloc_rng(big_key_rng_name, 0, 0);
if (IS_ERR(big_key_rng)) {
big_key_rng = NULL;
return -EFAULT;
}
/* seed RNG */
ret = crypto_rng_reset(big_key_rng, NULL, crypto_rng_seedsize(big_key_rng));
if (ret)
goto error;
/* init block cipher */
big_key_skcipher = crypto_alloc_skcipher(big_key_alg_name,
0, CRYPTO_ALG_ASYNC);
if (IS_ERR(big_key_skcipher)) {
big_key_skcipher = NULL;
ret = -EFAULT;
goto error;
}
return 0;
error:
crypto_free_rng(big_key_rng);
big_key_rng = NULL;
return ret;
}
static int tegra_crypto_dev_open(struct inode *inode, struct file *filp)
{
struct tegra_crypto_ctx *ctx;
int ret = 0;
ctx = kzalloc(sizeof(struct tegra_crypto_ctx), GFP_KERNEL);
if (!ctx) {
pr_err("no memory for context\n");
return -ENOMEM;
}
ctx->ecb_tfm = crypto_alloc_ablkcipher("ecb-aes-tegra",
CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, 0);
if (IS_ERR(ctx->ecb_tfm)) {
pr_err("Failed to load transform for ecb-aes-tegra: %ld\n",
PTR_ERR(ctx->ecb_tfm));
ret = PTR_ERR(ctx->ecb_tfm);
goto fail_ecb;
}
ctx->cbc_tfm = crypto_alloc_ablkcipher("cbc-aes-tegra",
CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, 0);
if (IS_ERR(ctx->cbc_tfm)) {
pr_err("Failed to load transform for cbc-aes-tegra: %ld\n",
PTR_ERR(ctx->cbc_tfm));
ret = PTR_ERR(ctx->cbc_tfm);
goto fail_cbc;
}
ctx->rng = crypto_alloc_rng("rng-aes-tegra", CRYPTO_ALG_TYPE_RNG, 0);
if (IS_ERR(ctx->rng)) {
pr_err("Failed to load transform for tegra rng: %ld\n",
PTR_ERR(ctx->rng));
ret = PTR_ERR(ctx->rng);
goto fail_rng;
}
filp->private_data = ctx;
return ret;
fail_rng:
crypto_free_ablkcipher(ctx->cbc_tfm);
fail_cbc:
crypto_free_ablkcipher(ctx->ecb_tfm);
fail_ecb:
kfree(ctx);
return ret;
}
/*
* Register key type
*/
static int __init big_key_init(void)
{
struct crypto_skcipher *cipher;
struct crypto_rng *rng;
int ret;
rng = crypto_alloc_rng(big_key_rng_name, 0, 0);
if (IS_ERR(rng)) {
pr_err("Can't alloc rng: %ld\n", PTR_ERR(rng));
return PTR_ERR(rng);
}
big_key_rng = rng;
/* seed RNG */
ret = crypto_rng_reset(rng, NULL, crypto_rng_seedsize(rng));
if (ret) {
pr_err("Can't reset rng: %d\n", ret);
goto error_rng;
}
/* init block cipher */
cipher = crypto_alloc_skcipher(big_key_alg_name, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(cipher)) {
ret = PTR_ERR(cipher);
pr_err("Can't alloc crypto: %d\n", ret);
goto error_rng;
}
big_key_skcipher = cipher;
ret = register_key_type(&key_type_big_key);
if (ret < 0) {
pr_err("Can't register type: %d\n", ret);
goto error_cipher;
}
return 0;
error_cipher:
crypto_free_skcipher(big_key_skcipher);
error_rng:
crypto_free_rng(big_key_rng);
return ret;
}
static int tegra_crypto_dev_open(struct inode *inode, struct file *filp)
{
struct tegra_crypto_ctx *ctx;
int ret = 0;
ctx = kzalloc(sizeof(struct tegra_crypto_ctx), GFP_KERNEL);
if (!ctx) {
pr_err("no memory for context\n");
return -ENOMEM;
}
ctx->ecb_tfm = crypto_alloc_ablkcipher("ecb-aes-tegra",
CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, 0);
if (IS_ERR(ctx->ecb_tfm)) {
pr_err("Failed to load transform for ecb-aes-tegra: %ld\n",
PTR_ERR(ctx->ecb_tfm));
ret = PTR_ERR(ctx->ecb_tfm);
goto fail_ecb;
}
ctx->cbc_tfm = crypto_alloc_ablkcipher("cbc-aes-tegra",
CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, 0);
if (IS_ERR(ctx->cbc_tfm)) {
pr_err("Failed to load transform for cbc-aes-tegra: %ld\n",
PTR_ERR(ctx->cbc_tfm));
ret = PTR_ERR(ctx->cbc_tfm);
goto fail_cbc;
}
if (tegra_get_chipid() != TEGRA_CHIPID_TEGRA2) {
ctx->ofb_tfm = crypto_alloc_ablkcipher("ofb-aes-tegra",
CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, 0);
if (IS_ERR(ctx->ofb_tfm)) {
pr_err("Failed to load transform for ofb-aes-tegra: %ld\n",
PTR_ERR(ctx->ofb_tfm));
ret = PTR_ERR(ctx->ofb_tfm);
goto fail_ofb;
}
ctx->ctr_tfm = crypto_alloc_ablkcipher("ctr-aes-tegra",
CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, 0);
if (IS_ERR(ctx->ctr_tfm)) {
pr_err("Failed to load transform for ctr-aes-tegra: %ld\n",
PTR_ERR(ctx->ctr_tfm));
ret = PTR_ERR(ctx->ctr_tfm);
goto fail_ctr;
}
}
if (tegra_get_chipid() != TEGRA_CHIPID_TEGRA2 &&
tegra_get_chipid() != TEGRA_CHIPID_TEGRA3) {
ctx->rng_drbg = crypto_alloc_rng("rng_drbg-aes-tegra",
CRYPTO_ALG_TYPE_RNG, 0);
if (IS_ERR(ctx->rng_drbg)) {
pr_err("Failed to load transform for rng_drbg tegra: %ld\n",
PTR_ERR(ctx->rng_drbg));
ret = PTR_ERR(ctx->rng_drbg);
goto fail_rng;
}
} else {
ctx->rng = crypto_alloc_rng("rng-aes-tegra",
CRYPTO_ALG_TYPE_RNG, 0);
if (IS_ERR(ctx->rng)) {
pr_err("Failed to load transform for tegra rng: %ld\n",
PTR_ERR(ctx->rng));
ret = PTR_ERR(ctx->rng);
goto fail_rng;
}
}
ctx->rsa512_tfm = crypto_alloc_ahash("tegra-se-rsa512",
CRYPTO_ALG_TYPE_AHASH, 0);
if (IS_ERR(ctx->rsa512_tfm)) {
pr_err("Failed to load transform for rsa512: %ld\n",
PTR_ERR(ctx->rsa512_tfm));
goto fail_rsa512;
}
ctx->rsa1024_tfm = crypto_alloc_ahash("tegra-se-rsa1024",
CRYPTO_ALG_TYPE_AHASH, 0);
if (IS_ERR(ctx->rsa1024_tfm)) {
pr_err("Failed to load transform for rsa1024: %ld\n",
PTR_ERR(ctx->rsa1024_tfm));
goto fail_rsa1024;
}
ctx->rsa1536_tfm = crypto_alloc_ahash("tegra-se-rsa1536",
CRYPTO_ALG_TYPE_AHASH, 0);
if (IS_ERR(ctx->rsa1536_tfm)) {
pr_err("Failed to load transform for rsa1536: %ld\n",
PTR_ERR(ctx->rsa1536_tfm));
goto fail_rsa1536;
}
ctx->rsa2048_tfm = crypto_alloc_ahash("tegra-se-rsa2048",
CRYPTO_ALG_TYPE_AHASH, 0);
if (IS_ERR(ctx->rsa2048_tfm)) {
pr_err("Failed to load transform for rsa2048: %ld\n",
PTR_ERR(ctx->rsa2048_tfm));
goto fail_rsa2048;
}
filp->private_data = ctx;
return ret;
fail_rsa2048:
crypto_free_ahash(ctx->rsa1536_tfm);
fail_rsa1536:
crypto_free_ahash(ctx->rsa1024_tfm);
fail_rsa1024:
crypto_free_ahash(ctx->rsa512_tfm);
fail_rsa512:
if (tegra_get_chipid() != TEGRA_CHIPID_TEGRA2 &&
tegra_get_chipid() != TEGRA_CHIPID_TEGRA3)
crypto_free_rng(ctx->rng_drbg);
else
crypto_free_rng(ctx->rng);
fail_rng:
if (tegra_get_chipid() != TEGRA_CHIPID_TEGRA2)
crypto_free_ablkcipher(ctx->ctr_tfm);
fail_ctr:
if (tegra_get_chipid() != TEGRA_CHIPID_TEGRA2)
crypto_free_ablkcipher(ctx->ofb_tfm);
fail_ofb:
crypto_free_ablkcipher(ctx->cbc_tfm);
fail_cbc:
crypto_free_ablkcipher(ctx->ecb_tfm);
fail_ecb:
kfree(ctx);
return ret;
}