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Diffstat (limited to 'crypto/cipher.c')
-rw-r--r--crypto/cipher.c117
1 files changed, 94 insertions, 23 deletions
diff --git a/crypto/cipher.c b/crypto/cipher.c
index b899eb97abd..9e03701cfdc 100644
--- a/crypto/cipher.c
+++ b/crypto/cipher.c
@@ -23,6 +23,28 @@
#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];
@@ -45,15 +67,10 @@ static unsigned int crypt_slow(const struct cipher_desc *desc,
u8 buffer[bsize * 2 + alignmask];
u8 *src = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
u8 *dst = src + bsize;
- unsigned int n;
-
- n = scatterwalk_copychunks(src, in, bsize, 0);
- scatterwalk_advance(in, n);
+ scatterwalk_copychunks(src, in, bsize, 0);
desc->prfn(desc, dst, src, bsize);
-
- n = scatterwalk_copychunks(dst, out, bsize, 1);
- scatterwalk_advance(out, n);
+ scatterwalk_copychunks(dst, out, bsize, 1);
return bsize;
}
@@ -64,12 +81,16 @@ static inline unsigned int crypt_fast(const struct cipher_desc *desc,
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 = in->data;
- dst = scatterwalk_samebuf(in, out) ? src : out->data;
+ src = real_src;
+ dst = scatterwalk_samebuf(in, out) ? src : real_dst;
if (tmp) {
- memcpy(tmp, in->data, nbytes);
+ memcpy(tmp, src, nbytes);
src = tmp;
dst = tmp;
}
@@ -77,7 +98,10 @@ static inline unsigned int crypt_fast(const struct cipher_desc *desc,
nbytes = desc->prfn(desc, dst, src, nbytes);
if (tmp)
- memcpy(out->data, tmp, nbytes);
+ memcpy(real_dst, tmp, nbytes);
+
+ scatterwalk_unmap(real_src, 0);
+ scatterwalk_unmap(real_dst, 1);
scatterwalk_advance(in, nbytes);
scatterwalk_advance(out, nbytes);
@@ -126,9 +150,6 @@ static int crypt(const struct cipher_desc *desc,
tmp = (u8 *)buffer;
}
- scatterwalk_map(&walk_in, 0);
- scatterwalk_map(&walk_out, 1);
-
n = scatterwalk_clamp(&walk_in, n);
n = scatterwalk_clamp(&walk_out, n);
@@ -145,7 +166,7 @@ static int crypt(const struct cipher_desc *desc,
if (!nbytes)
break;
- crypto_yield(tfm);
+ crypto_yield(tfm->crt_flags);
}
if (buffer)
@@ -264,12 +285,12 @@ static int setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
{
struct cipher_alg *cia = &tfm->__crt_alg->cra_cipher;
+ tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
if (keylen < cia->cia_min_keysize || keylen > cia->cia_max_keysize) {
tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
return -EINVAL;
} else
- return cia->cia_setkey(tfm, key, keylen,
- &tfm->crt_flags);
+ return cia->cia_setkey(tfm, key, keylen);
}
static int ecb_encrypt(struct crypto_tfm *tfm,
@@ -277,7 +298,7 @@ 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;
+ struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
desc.crfn = cipher->cia_encrypt;
@@ -292,7 +313,7 @@ static int ecb_decrypt(struct crypto_tfm *tfm,
unsigned int nbytes)
{
struct cipher_desc desc;
- struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
+ struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
desc.crfn = cipher->cia_decrypt;
@@ -307,7 +328,7 @@ static int cbc_encrypt(struct crypto_tfm *tfm,
unsigned int nbytes)
{
struct cipher_desc desc;
- struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
+ struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
desc.crfn = cipher->cia_encrypt;
@@ -323,7 +344,7 @@ 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;
+ struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
desc.crfn = cipher->cia_encrypt;
@@ -339,7 +360,7 @@ static int cbc_decrypt(struct crypto_tfm *tfm,
unsigned int nbytes)
{
struct cipher_desc desc;
- struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
+ struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
desc.crfn = cipher->cia_decrypt;
@@ -355,7 +376,7 @@ 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;
+ struct cipher_alg_compat *cipher = (void *)&tfm->__crt_alg->cra_cipher;
desc.tfm = tfm;
desc.crfn = cipher->cia_decrypt;
@@ -388,17 +409,67 @@ int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags)
return 0;
}
+static void cipher_crypt_unaligned(void (*fn)(struct crypto_tfm *, u8 *,
+ const u8 *),
+ struct crypto_tfm *tfm,
+ u8 *dst, const u8 *src)
+{
+ unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
+ unsigned int size = crypto_tfm_alg_blocksize(tfm);
+ u8 buffer[size + alignmask];
+ u8 *tmp = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
+
+ memcpy(tmp, src, size);
+ fn(tfm, tmp, tmp);
+ memcpy(dst, tmp, size);
+}
+
+static void cipher_encrypt_unaligned(struct crypto_tfm *tfm,
+ u8 *dst, const u8 *src)
+{
+ unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
+ struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
+
+ if (unlikely(((unsigned long)dst | (unsigned long)src) & alignmask)) {
+ cipher_crypt_unaligned(cipher->cia_encrypt, tfm, dst, src);
+ return;
+ }
+
+ cipher->cia_encrypt(tfm, dst, src);
+}
+
+static void cipher_decrypt_unaligned(struct crypto_tfm *tfm,
+ u8 *dst, const u8 *src)
+{
+ unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
+ struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
+
+ if (unlikely(((unsigned long)dst | (unsigned long)src) & alignmask)) {
+ cipher_crypt_unaligned(cipher->cia_decrypt, tfm, dst, src);
+ return;
+ }
+
+ cipher->cia_decrypt(tfm, dst, src);
+}
+
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;
ops->cit_setkey = setkey;
+ ops->cit_encrypt_one = crypto_tfm_alg_alignmask(tfm) ?
+ cipher_encrypt_unaligned : cipher->cia_encrypt;
+ 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:
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-26 04:19:49 +0000