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authorHerbert Xu <herbert@gondor.apana.org.au>2005-07-06 13:51:52 -0700
committerDavid S. Miller <davem@davemloft.net>2005-07-06 13:51:52 -0700
commit40725181b74be6b0e3bdc8c05bd1e0b9873ec5cc (patch)
treeabbc1057a5e0bd77385d17cfc6146617151e93bc /crypto
parentc774e93e2152d0be2612739418689e6e6400f4eb (diff)
downloadlinux-linaro-stable-40725181b74be6b0e3bdc8c05bd1e0b9873ec5cc.tar.gz
[CRYPTO] Add support for low-level multi-block operations
This patch adds hooks for cipher algorithms to implement multi-block ECB/CBC operations directly. This is expected to provide significant performance boots to the VIA Padlock. It could also be used for improving software implementations such as AES where operating on multiple blocks at a time may enable certain optimisations. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/cipher.c38
-rw-r--r--crypto/internal.h5
2 files changed, 18 insertions, 25 deletions
diff --git a/crypto/cipher.c b/crypto/cipher.c
index c4243345b154..54c4a560070d 100644
--- a/crypto/cipher.c
+++ b/crypto/cipher.c
@@ -23,14 +23,6 @@
#include "internal.h"
#include "scatterwalk.h"
-struct cipher_desc {
- struct crypto_tfm *tfm;
- void (*crfn)(void *ctx, u8 *dst, const u8 *src);
- unsigned int (*prfn)(const struct cipher_desc *desc, u8 *dst,
- const u8 *src, unsigned int nbytes);
- void *info;
-};
-
static inline void xor_64(u8 *a, const u8 *b)
{
((u32 *)a)[0] ^= ((u32 *)b)[0];
@@ -224,10 +216,11 @@ static int ecb_encrypt(struct crypto_tfm *tfm,
struct scatterlist *src, unsigned int nbytes)
{
struct cipher_desc desc;
+ struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
- desc.crfn = tfm->__crt_alg->cra_cipher.cia_encrypt;
- desc.prfn = ecb_process;
+ desc.crfn = cipher->cia_encrypt;
+ desc.prfn = cipher->cia_encrypt_ecb ?: ecb_process;
return crypt(&desc, dst, src, nbytes);
}
@@ -238,10 +231,11 @@ static int ecb_decrypt(struct crypto_tfm *tfm,
unsigned int nbytes)
{
struct cipher_desc desc;
+ struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
- desc.crfn = tfm->__crt_alg->cra_cipher.cia_decrypt;
- desc.prfn = ecb_process;
+ desc.crfn = cipher->cia_decrypt;
+ desc.prfn = cipher->cia_decrypt_ecb ?: ecb_process;
return crypt(&desc, dst, src, nbytes);
}
@@ -252,10 +246,11 @@ static int cbc_encrypt(struct crypto_tfm *tfm,
unsigned int nbytes)
{
struct cipher_desc desc;
+ struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
- desc.crfn = tfm->__crt_alg->cra_cipher.cia_encrypt;
- desc.prfn = cbc_process_encrypt;
+ 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);
@@ -267,10 +262,11 @@ static int cbc_encrypt_iv(struct crypto_tfm *tfm,
unsigned int nbytes, u8 *iv)
{
struct cipher_desc desc;
+ struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
- desc.crfn = tfm->__crt_alg->cra_cipher.cia_encrypt;
- desc.prfn = cbc_process_encrypt;
+ desc.crfn = cipher->cia_encrypt;
+ desc.prfn = cipher->cia_encrypt_cbc ?: cbc_process_encrypt;
desc.info = iv;
return crypt(&desc, dst, src, nbytes);
@@ -282,10 +278,11 @@ static int cbc_decrypt(struct crypto_tfm *tfm,
unsigned int nbytes)
{
struct cipher_desc desc;
+ struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
- desc.crfn = tfm->__crt_alg->cra_cipher.cia_decrypt;
- desc.prfn = cbc_process_decrypt;
+ 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);
@@ -297,10 +294,11 @@ static int cbc_decrypt_iv(struct crypto_tfm *tfm,
unsigned int nbytes, u8 *iv)
{
struct cipher_desc desc;
+ struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
- desc.crfn = tfm->__crt_alg->cra_cipher.cia_decrypt;
- desc.prfn = cbc_process_decrypt;
+ desc.crfn = cipher->cia_decrypt;
+ desc.prfn = cipher->cia_decrypt_cbc ?: cbc_process_decrypt;
desc.info = iv;
return crypt(&desc, dst, src, nbytes);
diff --git a/crypto/internal.h b/crypto/internal.h
index 964b9a60ca24..5ed383f7dce6 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -42,11 +42,6 @@ static inline void crypto_yield(struct crypto_tfm *tfm)
cond_resched();
}
-static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
-{
- return (void *)&tfm[1];
-}
-
struct crypto_alg *crypto_alg_lookup(const char *name);
/* A far more intelligent version of this is planned. For now, just