diff options
Diffstat (limited to 'arch/x86/crypto')
| -rw-r--r-- | arch/x86/crypto/aesni-intel_glue.c | 73 |
1 files changed, 32 insertions, 41 deletions
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c index d96685457196..2144e54a6c89 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -283,16 +283,16 @@ static int ecb_encrypt(struct skcipher_request *req) unsigned int nbytes; int err; - err = skcipher_walk_virt(&walk, req, true); + err = skcipher_walk_virt(&walk, req, false); - kernel_fpu_begin(); while ((nbytes = walk.nbytes)) { + kernel_fpu_begin(); aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, nbytes & AES_BLOCK_MASK); + kernel_fpu_end(); nbytes &= AES_BLOCK_SIZE - 1; err = skcipher_walk_done(&walk, nbytes); } - kernel_fpu_end(); return err; } @@ -305,16 +305,16 @@ static int ecb_decrypt(struct skcipher_request *req) unsigned int nbytes; int err; - err = skcipher_walk_virt(&walk, req, true); + err = skcipher_walk_virt(&walk, req, false); - kernel_fpu_begin(); while ((nbytes = walk.nbytes)) { + kernel_fpu_begin(); aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, nbytes & AES_BLOCK_MASK); + kernel_fpu_end(); nbytes &= AES_BLOCK_SIZE - 1; err = skcipher_walk_done(&walk, nbytes); } - kernel_fpu_end(); return err; } @@ -327,16 +327,16 @@ static int cbc_encrypt(struct skcipher_request *req) unsigned int nbytes; int err; - err = skcipher_walk_virt(&walk, req, true); + err = skcipher_walk_virt(&walk, req, false); - kernel_fpu_begin(); while ((nbytes = walk.nbytes)) { + kernel_fpu_begin(); aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, nbytes & AES_BLOCK_MASK, walk.iv); + kernel_fpu_end(); nbytes &= AES_BLOCK_SIZE - 1; err = skcipher_walk_done(&walk, nbytes); } - kernel_fpu_end(); return err; } @@ -349,16 +349,16 @@ static int cbc_decrypt(struct skcipher_request *req) unsigned int nbytes; int err; - err = skcipher_walk_virt(&walk, req, true); + err = skcipher_walk_virt(&walk, req, false); - kernel_fpu_begin(); while ((nbytes = walk.nbytes)) { + kernel_fpu_begin(); aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, nbytes & AES_BLOCK_MASK, walk.iv); + kernel_fpu_end(); nbytes &= AES_BLOCK_SIZE - 1; err = skcipher_walk_done(&walk, nbytes); } - kernel_fpu_end(); return err; } @@ -476,21 +476,6 @@ static int cts_cbc_decrypt(struct skcipher_request *req) } #ifdef CONFIG_X86_64 -static void ctr_crypt_final(struct crypto_aes_ctx *ctx, - struct skcipher_walk *walk) -{ - u8 *ctrblk = walk->iv; - u8 keystream[AES_BLOCK_SIZE]; - u8 *src = walk->src.virt.addr; - u8 *dst = walk->dst.virt.addr; - unsigned int nbytes = walk->nbytes; - - aesni_enc(ctx, keystream, ctrblk); - crypto_xor_cpy(dst, keystream, src, nbytes); - - crypto_inc(ctrblk, AES_BLOCK_SIZE); -} - static void aesni_ctr_enc_avx_tfm(struct crypto_aes_ctx *ctx, u8 *out, const u8 *in, unsigned int len, u8 *iv) { @@ -512,27 +497,33 @@ static int ctr_crypt(struct skcipher_request *req) { struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm)); + u8 keystream[AES_BLOCK_SIZE]; struct skcipher_walk walk; unsigned int nbytes; int err; - err = skcipher_walk_virt(&walk, req, true); + err = skcipher_walk_virt(&walk, req, false); - kernel_fpu_begin(); - while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) { - static_call(aesni_ctr_enc_tfm)(ctx, walk.dst.virt.addr, - walk.src.virt.addr, - nbytes & AES_BLOCK_MASK, - walk.iv); - nbytes &= AES_BLOCK_SIZE - 1; + while ((nbytes = walk.nbytes) > 0) { + kernel_fpu_begin(); + if (nbytes & AES_BLOCK_MASK) + static_call(aesni_ctr_enc_tfm)(ctx, walk.dst.virt.addr, + walk.src.virt.addr, + nbytes & AES_BLOCK_MASK, + walk.iv); + nbytes &= ~AES_BLOCK_MASK; + + if (walk.nbytes == walk.total && nbytes > 0) { + aesni_enc(ctx, keystream, walk.iv); + crypto_xor_cpy(walk.dst.virt.addr + walk.nbytes - nbytes, + walk.src.virt.addr + walk.nbytes - nbytes, + keystream, nbytes); + crypto_inc(walk.iv, AES_BLOCK_SIZE); + nbytes = 0; + } + kernel_fpu_end(); err = skcipher_walk_done(&walk, nbytes); } - if (walk.nbytes) { - ctr_crypt_final(ctx, &walk); - err = skcipher_walk_done(&walk, 0); - } - kernel_fpu_end(); - return err; } |