diff options
author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2006-09-23 14:34:10 +0200 |
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committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2006-09-23 14:34:10 +0200 |
commit | 919251758195919ae3568021bc221e4f8c4b20eb (patch) | |
tree | 81137a037ff8e6c91cc8de72d568275605c653c5 /crypto/cipher.c | |
parent | c394f1eafef61c6666f5876afde6110a276c4c9f (diff) | |
parent | 3eeab61aa3ddd3c0bedb7449ada1599de22fdb5a (diff) |
Merge branch 'mainline' into upstream-linus
Diffstat (limited to 'crypto/cipher.c')
-rw-r--r-- | crypto/cipher.c | 117 |
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: |