[CRYPTO] api: Remove deprecated interface
This patch removes the old cipher interface and related code.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/algapi.c b/crypto/algapi.c
index c915300..69eb504 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -396,7 +396,7 @@
return ERR_PTR(-EAGAIN);
}
- tfm = __crypto_alloc_tfm(alg, 0);
+ tfm = __crypto_alloc_tfm(alg);
if (IS_ERR(tfm))
crypto_mod_put(alg);
diff --git a/crypto/api.c b/crypto/api.c
index 8c44687..8b80bae 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -212,25 +212,6 @@
}
EXPORT_SYMBOL_GPL(crypto_alg_mod_lookup);
-static int crypto_init_flags(struct crypto_tfm *tfm, u32 flags)
-{
- tfm->crt_flags = flags & CRYPTO_TFM_REQ_MASK;
- flags &= ~CRYPTO_TFM_REQ_MASK;
-
- switch (crypto_tfm_alg_type(tfm)) {
- case CRYPTO_ALG_TYPE_CIPHER:
- return crypto_init_cipher_flags(tfm, flags);
-
- case CRYPTO_ALG_TYPE_DIGEST:
- return crypto_init_digest_flags(tfm, flags);
-
- case CRYPTO_ALG_TYPE_COMPRESS:
- return crypto_init_compress_flags(tfm, flags);
- }
-
- return 0;
-}
-
static int crypto_init_ops(struct crypto_tfm *tfm)
{
const struct crypto_type *type = tfm->__crt_alg->cra_type;
@@ -285,7 +266,7 @@
}
}
-static unsigned int crypto_ctxsize(struct crypto_alg *alg, int flags)
+static unsigned int crypto_ctxsize(struct crypto_alg *alg)
{
const struct crypto_type *type = alg->cra_type;
unsigned int len;
@@ -299,15 +280,15 @@
BUG();
case CRYPTO_ALG_TYPE_CIPHER:
- len += crypto_cipher_ctxsize(alg, flags);
+ len += crypto_cipher_ctxsize(alg);
break;
case CRYPTO_ALG_TYPE_DIGEST:
- len += crypto_digest_ctxsize(alg, flags);
+ len += crypto_digest_ctxsize(alg);
break;
case CRYPTO_ALG_TYPE_COMPRESS:
- len += crypto_compress_ctxsize(alg, flags);
+ len += crypto_compress_ctxsize(alg);
break;
}
@@ -322,23 +303,19 @@
}
EXPORT_SYMBOL_GPL(crypto_shoot_alg);
-struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 flags)
+struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg)
{
struct crypto_tfm *tfm = NULL;
unsigned int tfm_size;
int err = -ENOMEM;
- tfm_size = sizeof(*tfm) + crypto_ctxsize(alg, flags);
+ tfm_size = sizeof(*tfm) + crypto_ctxsize(alg);
tfm = kzalloc(tfm_size, GFP_KERNEL);
if (tfm == NULL)
goto out_err;
tfm->__crt_alg = alg;
- err = crypto_init_flags(tfm, flags);
- if (err)
- goto out_free_tfm;
-
err = crypto_init_ops(tfm);
if (err)
goto out_free_tfm;
@@ -362,31 +339,6 @@
}
EXPORT_SYMBOL_GPL(__crypto_alloc_tfm);
-struct crypto_tfm *crypto_alloc_tfm(const char *name, u32 flags)
-{
- struct crypto_tfm *tfm = NULL;
- int err;
-
- do {
- struct crypto_alg *alg;
-
- alg = crypto_alg_mod_lookup(name, 0, CRYPTO_ALG_ASYNC);
- err = PTR_ERR(alg);
- if (IS_ERR(alg))
- continue;
-
- tfm = __crypto_alloc_tfm(alg, flags);
- err = 0;
- if (IS_ERR(tfm)) {
- crypto_mod_put(alg);
- err = PTR_ERR(tfm);
- tfm = NULL;
- }
- } while (err == -EAGAIN && !signal_pending(current));
-
- return tfm;
-}
-
/*
* crypto_alloc_base - Locate algorithm and allocate transform
* @alg_name: Name of algorithm
@@ -420,7 +372,7 @@
goto err;
}
- tfm = __crypto_alloc_tfm(alg, 0);
+ tfm = __crypto_alloc_tfm(alg);
if (!IS_ERR(tfm))
return tfm;
@@ -466,7 +418,6 @@
kfree(tfm);
}
-EXPORT_SYMBOL_GPL(crypto_alloc_tfm);
EXPORT_SYMBOL_GPL(crypto_free_tfm);
int crypto_has_alg(const char *name, u32 type, u32 mask)
diff --git a/crypto/cipher.c b/crypto/cipher.c
index 9e03701..333aab2f 100644
--- a/crypto/cipher.c
+++ b/crypto/cipher.c
@@ -12,274 +12,13 @@
* any later version.
*
*/
-#include <linux/compiler.h>
+
#include <linux/kernel.h>
#include <linux/crypto.h>
#include <linux/errno.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
+#include <linux/scatterlist.h>
#include <linux/string.h>
-#include <asm/scatterlist.h>
#include "internal.h"
-#include "scatterwalk.h"
-
-struct cipher_alg_compat {
- unsigned int cia_min_keysize;
- unsigned int cia_max_keysize;
- int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen);
- void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
- void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
-
- unsigned int (*cia_encrypt_ecb)(const struct cipher_desc *desc,
- u8 *dst, const u8 *src,
- unsigned int nbytes);
- unsigned int (*cia_decrypt_ecb)(const struct cipher_desc *desc,
- u8 *dst, const u8 *src,
- unsigned int nbytes);
- unsigned int (*cia_encrypt_cbc)(const struct cipher_desc *desc,
- u8 *dst, const u8 *src,
- unsigned int nbytes);
- unsigned int (*cia_decrypt_cbc)(const struct cipher_desc *desc,
- u8 *dst, const u8 *src,
- unsigned int nbytes);
-};
-
-static inline void xor_64(u8 *a, const u8 *b)
-{
- ((u32 *)a)[0] ^= ((u32 *)b)[0];
- ((u32 *)a)[1] ^= ((u32 *)b)[1];
-}
-
-static inline void xor_128(u8 *a, const u8 *b)
-{
- ((u32 *)a)[0] ^= ((u32 *)b)[0];
- ((u32 *)a)[1] ^= ((u32 *)b)[1];
- ((u32 *)a)[2] ^= ((u32 *)b)[2];
- ((u32 *)a)[3] ^= ((u32 *)b)[3];
-}
-
-static unsigned int crypt_slow(const struct cipher_desc *desc,
- struct scatter_walk *in,
- struct scatter_walk *out, unsigned int bsize)
-{
- unsigned long alignmask = crypto_tfm_alg_alignmask(desc->tfm);
- u8 buffer[bsize * 2 + alignmask];
- u8 *src = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
- u8 *dst = src + bsize;
-
- scatterwalk_copychunks(src, in, bsize, 0);
- desc->prfn(desc, dst, src, bsize);
- scatterwalk_copychunks(dst, out, bsize, 1);
-
- return bsize;
-}
-
-static inline unsigned int crypt_fast(const struct cipher_desc *desc,
- struct scatter_walk *in,
- struct scatter_walk *out,
- unsigned int nbytes, u8 *tmp)
-{
- u8 *src, *dst;
- u8 *real_src, *real_dst;
-
- real_src = scatterwalk_map(in, 0);
- real_dst = scatterwalk_map(out, 1);
-
- src = real_src;
- dst = scatterwalk_samebuf(in, out) ? src : real_dst;
-
- if (tmp) {
- memcpy(tmp, src, nbytes);
- src = tmp;
- dst = tmp;
- }
-
- nbytes = desc->prfn(desc, dst, src, nbytes);
-
- if (tmp)
- memcpy(real_dst, tmp, nbytes);
-
- scatterwalk_unmap(real_src, 0);
- scatterwalk_unmap(real_dst, 1);
-
- scatterwalk_advance(in, nbytes);
- scatterwalk_advance(out, nbytes);
-
- return nbytes;
-}
-
-/*
- * Generic encrypt/decrypt wrapper for ciphers, handles operations across
- * multiple page boundaries by using temporary blocks. In user context,
- * the kernel is given a chance to schedule us once per page.
- */
-static int crypt(const struct cipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes)
-{
- struct scatter_walk walk_in, walk_out;
- struct crypto_tfm *tfm = desc->tfm;
- const unsigned int bsize = crypto_tfm_alg_blocksize(tfm);
- unsigned int alignmask = crypto_tfm_alg_alignmask(tfm);
- unsigned long buffer = 0;
-
- if (!nbytes)
- return 0;
-
- if (nbytes % bsize) {
- tfm->crt_flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN;
- return -EINVAL;
- }
-
- scatterwalk_start(&walk_in, src);
- scatterwalk_start(&walk_out, dst);
-
- for(;;) {
- unsigned int n = nbytes;
- u8 *tmp = NULL;
-
- if (!scatterwalk_aligned(&walk_in, alignmask) ||
- !scatterwalk_aligned(&walk_out, alignmask)) {
- if (!buffer) {
- buffer = __get_free_page(GFP_ATOMIC);
- if (!buffer)
- n = 0;
- }
- tmp = (u8 *)buffer;
- }
-
- n = scatterwalk_clamp(&walk_in, n);
- n = scatterwalk_clamp(&walk_out, n);
-
- if (likely(n >= bsize))
- n = crypt_fast(desc, &walk_in, &walk_out, n, tmp);
- else
- n = crypt_slow(desc, &walk_in, &walk_out, bsize);
-
- nbytes -= n;
-
- scatterwalk_done(&walk_in, 0, nbytes);
- scatterwalk_done(&walk_out, 1, nbytes);
-
- if (!nbytes)
- break;
-
- crypto_yield(tfm->crt_flags);
- }
-
- if (buffer)
- free_page(buffer);
-
- return 0;
-}
-
-static int crypt_iv_unaligned(struct cipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes)
-{
- struct crypto_tfm *tfm = desc->tfm;
- unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
- u8 *iv = desc->info;
-
- if (unlikely(((unsigned long)iv & alignmask))) {
- unsigned int ivsize = tfm->crt_cipher.cit_ivsize;
- u8 buffer[ivsize + alignmask];
- u8 *tmp = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
- int err;
-
- desc->info = memcpy(tmp, iv, ivsize);
- err = crypt(desc, dst, src, nbytes);
- memcpy(iv, tmp, ivsize);
-
- return err;
- }
-
- return crypt(desc, dst, src, nbytes);
-}
-
-static unsigned int cbc_process_encrypt(const struct cipher_desc *desc,
- u8 *dst, const u8 *src,
- unsigned int nbytes)
-{
- struct crypto_tfm *tfm = desc->tfm;
- void (*xor)(u8 *, const u8 *) = tfm->crt_u.cipher.cit_xor_block;
- int bsize = crypto_tfm_alg_blocksize(tfm);
-
- void (*fn)(struct crypto_tfm *, u8 *, const u8 *) = desc->crfn;
- u8 *iv = desc->info;
- unsigned int done = 0;
-
- nbytes -= bsize;
-
- do {
- xor(iv, src);
- fn(tfm, dst, iv);
- memcpy(iv, dst, bsize);
-
- src += bsize;
- dst += bsize;
- } while ((done += bsize) <= nbytes);
-
- return done;
-}
-
-static unsigned int cbc_process_decrypt(const struct cipher_desc *desc,
- u8 *dst, const u8 *src,
- unsigned int nbytes)
-{
- struct crypto_tfm *tfm = desc->tfm;
- void (*xor)(u8 *, const u8 *) = tfm->crt_u.cipher.cit_xor_block;
- int bsize = crypto_tfm_alg_blocksize(tfm);
- unsigned long alignmask = crypto_tfm_alg_alignmask(desc->tfm);
-
- u8 stack[src == dst ? bsize + alignmask : 0];
- u8 *buf = (u8 *)ALIGN((unsigned long)stack, alignmask + 1);
- u8 **dst_p = src == dst ? &buf : &dst;
-
- void (*fn)(struct crypto_tfm *, u8 *, const u8 *) = desc->crfn;
- u8 *iv = desc->info;
- unsigned int done = 0;
-
- nbytes -= bsize;
-
- do {
- u8 *tmp_dst = *dst_p;
-
- fn(tfm, tmp_dst, src);
- xor(tmp_dst, iv);
- memcpy(iv, src, bsize);
- if (tmp_dst != dst)
- memcpy(dst, tmp_dst, bsize);
-
- src += bsize;
- dst += bsize;
- } while ((done += bsize) <= nbytes);
-
- return done;
-}
-
-static unsigned int ecb_process(const struct cipher_desc *desc, u8 *dst,
- const u8 *src, unsigned int nbytes)
-{
- struct crypto_tfm *tfm = desc->tfm;
- int bsize = crypto_tfm_alg_blocksize(tfm);
- void (*fn)(struct crypto_tfm *, u8 *, const u8 *) = desc->crfn;
- unsigned int done = 0;
-
- nbytes -= bsize;
-
- do {
- fn(tfm, dst, src);
-
- src += bsize;
- dst += bsize;
- } while ((done += bsize) <= nbytes);
-
- return done;
-}
static int setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
{
@@ -293,122 +32,6 @@
return cia->cia_setkey(tfm, key, keylen);
}
-static int ecb_encrypt(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
-{
- struct cipher_desc desc;
- struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
-
- desc.tfm = tfm;
- desc.crfn = cipher->cia_encrypt;
- desc.prfn = cipher->cia_encrypt_ecb ?: ecb_process;
-
- return crypt(&desc, dst, src, nbytes);
-}
-
-static int ecb_decrypt(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes)
-{
- struct cipher_desc desc;
- struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
-
- desc.tfm = tfm;
- desc.crfn = cipher->cia_decrypt;
- desc.prfn = cipher->cia_decrypt_ecb ?: ecb_process;
-
- return crypt(&desc, dst, src, nbytes);
-}
-
-static int cbc_encrypt(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes)
-{
- struct cipher_desc desc;
- struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
-
- desc.tfm = tfm;
- desc.crfn = cipher->cia_encrypt;
- desc.prfn = cipher->cia_encrypt_cbc ?: cbc_process_encrypt;
- desc.info = tfm->crt_cipher.cit_iv;
-
- return crypt(&desc, dst, src, nbytes);
-}
-
-static int cbc_encrypt_iv(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes, u8 *iv)
-{
- struct cipher_desc desc;
- struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
-
- desc.tfm = tfm;
- desc.crfn = cipher->cia_encrypt;
- desc.prfn = cipher->cia_encrypt_cbc ?: cbc_process_encrypt;
- desc.info = iv;
-
- return crypt_iv_unaligned(&desc, dst, src, nbytes);
-}
-
-static int cbc_decrypt(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes)
-{
- struct cipher_desc desc;
- struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
-
- desc.tfm = tfm;
- desc.crfn = cipher->cia_decrypt;
- desc.prfn = cipher->cia_decrypt_cbc ?: cbc_process_decrypt;
- desc.info = tfm->crt_cipher.cit_iv;
-
- return crypt(&desc, dst, src, nbytes);
-}
-
-static int cbc_decrypt_iv(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes, u8 *iv)
-{
- struct cipher_desc desc;
- struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
-
- desc.tfm = tfm;
- desc.crfn = cipher->cia_decrypt;
- desc.prfn = cipher->cia_decrypt_cbc ?: cbc_process_decrypt;
- desc.info = iv;
-
- return crypt_iv_unaligned(&desc, dst, src, nbytes);
-}
-
-static int nocrypt(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes)
-{
- return -ENOSYS;
-}
-
-static int nocrypt_iv(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes, u8 *iv)
-{
- return -ENOSYS;
-}
-
-int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags)
-{
- u32 mode = flags & CRYPTO_TFM_MODE_MASK;
- tfm->crt_cipher.cit_mode = mode ? mode : CRYPTO_TFM_MODE_ECB;
- return 0;
-}
-
static void cipher_crypt_unaligned(void (*fn)(struct crypto_tfm *, u8 *,
const u8 *),
struct crypto_tfm *tfm,
@@ -454,7 +77,6 @@
int crypto_init_cipher_ops(struct crypto_tfm *tfm)
{
- int ret = 0;
struct cipher_tfm *ops = &tfm->crt_cipher;
struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
@@ -464,70 +86,7 @@
ops->cit_decrypt_one = crypto_tfm_alg_alignmask(tfm) ?
cipher_decrypt_unaligned : cipher->cia_decrypt;
- switch (tfm->crt_cipher.cit_mode) {
- case CRYPTO_TFM_MODE_ECB:
- ops->cit_encrypt = ecb_encrypt;
- ops->cit_decrypt = ecb_decrypt;
- ops->cit_encrypt_iv = nocrypt_iv;
- ops->cit_decrypt_iv = nocrypt_iv;
- 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;
- }
-
-out:
- return ret;
+ return 0;
}
void crypto_exit_cipher_ops(struct crypto_tfm *tfm)
diff --git a/crypto/compress.c b/crypto/compress.c
index eca182a..0a65700 100644
--- a/crypto/compress.c
+++ b/crypto/compress.c
@@ -34,11 +34,6 @@
dlen);
}
-int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags)
-{
- return flags ? -EINVAL : 0;
-}
-
int crypto_init_compress_ops(struct crypto_tfm *tfm)
{
struct compress_tfm *ops = &tfm->crt_compress;
diff --git a/crypto/digest.c b/crypto/digest.c
index bc47af6..1bf7414 100644
--- a/crypto/digest.c
+++ b/crypto/digest.c
@@ -136,11 +136,6 @@
return final(desc, out);
}
-int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags)
-{
- return flags ? -EINVAL : 0;
-}
-
int crypto_init_digest_ops(struct crypto_tfm *tfm)
{
struct hash_tfm *ops = &tfm->crt_hash;
diff --git a/crypto/internal.h b/crypto/internal.h
index 2da6ad4..784a774 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -83,8 +83,7 @@
{ }
#endif
-static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
- int flags)
+static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
{
unsigned int len = alg->cra_ctxsize;
@@ -96,23 +95,12 @@
return len;
}
-static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
- int flags)
+static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
{
- unsigned int len = alg->cra_ctxsize;
-
- switch (flags & CRYPTO_TFM_MODE_MASK) {
- case CRYPTO_TFM_MODE_CBC:
- len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
- len += alg->cra_blocksize;
- break;
- }
-
- return len;
+ return alg->cra_ctxsize;
}
-static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
- int flags)
+static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
{
return alg->cra_ctxsize;
}
@@ -121,10 +109,6 @@
struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
-int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
-int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
-int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
-
int crypto_init_digest_ops(struct crypto_tfm *tfm);
int crypto_init_cipher_ops(struct crypto_tfm *tfm);
int crypto_init_compress_ops(struct crypto_tfm *tfm);
@@ -136,7 +120,7 @@
void crypto_larval_error(const char *name, u32 type, u32 mask);
void crypto_shoot_alg(struct crypto_alg *alg);
-struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 flags);
+struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg);
int crypto_register_instance(struct crypto_template *tmpl,
struct crypto_instance *inst);