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crypto: serpent-sse2 - prepare serpent-sse2 glue code into generic x86 glue code for 128bit block ciphers
Block cipher implementations in arch/x86/crypto/ contain common glue code that is currently duplicated in each module (camellia-x86_64, twofish-x86_64-3way, twofish-avx, serpent-sse2 and serpent-avx). This patch prepares serpent-sse2 glue into generic glue code for all 128bit block ciphers to use in arch/x86/crypto. Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jussi Kivilinna
Herbert Xu
parent
a9629d7142
commit
e81792fbc2
@ -48,105 +48,129 @@
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#include <linux/workqueue.h>
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#include <linux/spinlock.h>
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static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes)
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typedef void (*common_glue_func_t)(void *ctx, u8 *dst, const u8 *src);
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typedef void (*common_glue_cbc_func_t)(void *ctx, u128 *dst, const u128 *src);
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typedef void (*common_glue_ctr_func_t)(void *ctx, u128 *dst, const u128 *src,
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u128 *iv);
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#define GLUE_FUNC_CAST(fn) ((common_glue_func_t)(fn))
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#define GLUE_CBC_FUNC_CAST(fn) ((common_glue_cbc_func_t)(fn))
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#define GLUE_CTR_FUNC_CAST(fn) ((common_glue_ctr_func_t)(fn))
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struct common_glue_func_entry {
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unsigned int num_blocks; /* number of blocks that @fn will process */
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union {
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common_glue_func_t ecb;
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common_glue_cbc_func_t cbc;
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common_glue_ctr_func_t ctr;
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} fn_u;
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};
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struct common_glue_ctx {
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unsigned int num_funcs;
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int fpu_blocks_limit; /* -1 means fpu not needed at all */
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/*
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* First funcs entry must have largest num_blocks and last funcs entry
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* must have num_blocks == 1!
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*/
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struct common_glue_func_entry funcs[];
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};
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static inline bool glue_fpu_begin(unsigned int bsize, int fpu_blocks_limit,
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struct blkcipher_desc *desc,
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bool fpu_enabled, unsigned int nbytes)
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{
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if (likely(fpu_blocks_limit < 0))
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return false;
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if (fpu_enabled)
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return true;
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/* SSE2 is only used when chunk to be processed is large enough, so
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* do not enable FPU until it is necessary.
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/*
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* Vector-registers are only used when chunk to be processed is large
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* enough, so do not enable FPU until it is necessary.
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*/
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if (nbytes < SERPENT_BLOCK_SIZE * SERPENT_PARALLEL_BLOCKS)
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if (nbytes < bsize * (unsigned int)fpu_blocks_limit)
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return false;
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if (desc) {
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/* prevent sleeping if FPU is in use */
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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}
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kernel_fpu_begin();
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return true;
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}
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static inline void serpent_fpu_end(bool fpu_enabled)
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static inline void glue_fpu_end(bool fpu_enabled)
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{
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if (fpu_enabled)
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kernel_fpu_end();
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}
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static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
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bool enc)
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static int __glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx,
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struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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void *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = 128 / 8;
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unsigned int nbytes, i, func_bytes;
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bool fpu_enabled = false;
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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unsigned int nbytes;
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int err;
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err = blkcipher_walk_virt(desc, walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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while ((nbytes = walk->nbytes)) {
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u8 *wsrc = walk->src.virt.addr;
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u8 *wdst = walk->dst.virt.addr;
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fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes);
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fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
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desc, fpu_enabled, nbytes);
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/* Process multi-block batch */
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if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) {
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do {
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if (enc)
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serpent_enc_blk_xway(ctx, wdst, wsrc);
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else
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serpent_dec_blk_xway(ctx, wdst, wsrc);
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for (i = 0; i < gctx->num_funcs; i++) {
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func_bytes = bsize * gctx->funcs[i].num_blocks;
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wsrc += bsize * SERPENT_PARALLEL_BLOCKS;
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wdst += bsize * SERPENT_PARALLEL_BLOCKS;
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nbytes -= bsize * SERPENT_PARALLEL_BLOCKS;
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} while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS);
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/* Process multi-block batch */
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if (nbytes >= func_bytes) {
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do {
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gctx->funcs[i].fn_u.ecb(ctx, wdst,
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wsrc);
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if (nbytes < bsize)
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goto done;
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wsrc += func_bytes;
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wdst += func_bytes;
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nbytes -= func_bytes;
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} while (nbytes >= func_bytes);
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if (nbytes < bsize)
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goto done;
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}
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}
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/* Handle leftovers */
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do {
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if (enc)
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__serpent_encrypt(ctx, wdst, wsrc);
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else
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__serpent_decrypt(ctx, wdst, wsrc);
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wsrc += bsize;
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wdst += bsize;
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nbytes -= bsize;
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} while (nbytes >= bsize);
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done:
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err = blkcipher_walk_done(desc, walk, nbytes);
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}
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serpent_fpu_end(fpu_enabled);
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glue_fpu_end(fpu_enabled);
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return err;
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}
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static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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int glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx,
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struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return ecb_crypt(desc, &walk, true);
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return __glue_ecb_crypt_128bit(gctx, desc, &walk);
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}
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static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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static unsigned int __glue_cbc_encrypt_128bit(const common_glue_func_t fn,
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struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return ecb_crypt(desc, &walk, false);
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}
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static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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void *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = 128 / 8;
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unsigned int nbytes = walk->nbytes;
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u128 *src = (u128 *)walk->src.virt.addr;
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u128 *dst = (u128 *)walk->dst.virt.addr;
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@ -154,7 +178,7 @@ static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
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do {
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u128_xor(dst, src, iv);
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__serpent_encrypt(ctx, (u8 *)dst, (u8 *)dst);
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fn(ctx, (u8 *)dst, (u8 *)dst);
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iv = dst;
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src += 1;
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@ -166,8 +190,10 @@ static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
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return nbytes;
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}
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static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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int glue_cbc_encrypt_128bit(const common_glue_func_t fn,
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struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct blkcipher_walk walk;
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int err;
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@ -176,24 +202,26 @@ static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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err = blkcipher_walk_virt(desc, &walk);
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while ((nbytes = walk.nbytes)) {
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nbytes = __cbc_encrypt(desc, &walk);
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nbytes = __glue_cbc_encrypt_128bit(fn, desc, &walk);
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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return err;
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}
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static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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static unsigned int
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__glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx,
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struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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void *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = 128 / 8;
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unsigned int nbytes = walk->nbytes;
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u128 *src = (u128 *)walk->src.virt.addr;
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u128 *dst = (u128 *)walk->dst.virt.addr;
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u128 ivs[SERPENT_PARALLEL_BLOCKS - 1];
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u128 last_iv;
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int i;
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unsigned int num_blocks, func_bytes;
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unsigned int i;
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/* Start of the last block. */
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src += nbytes / bsize - 1;
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@ -201,45 +229,31 @@ static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
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last_iv = *src;
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/* Process multi-block batch */
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if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) {
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do {
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nbytes -= bsize * (SERPENT_PARALLEL_BLOCKS - 1);
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src -= SERPENT_PARALLEL_BLOCKS - 1;
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dst -= SERPENT_PARALLEL_BLOCKS - 1;
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for (i = 0; i < gctx->num_funcs; i++) {
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num_blocks = gctx->funcs[i].num_blocks;
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func_bytes = bsize * num_blocks;
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for (i = 0; i < SERPENT_PARALLEL_BLOCKS - 1; i++)
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ivs[i] = src[i];
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/* Process multi-block batch */
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if (nbytes >= func_bytes) {
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do {
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nbytes -= func_bytes - bsize;
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src -= num_blocks - 1;
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dst -= num_blocks - 1;
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serpent_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
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gctx->funcs[i].fn_u.cbc(ctx, dst, src);
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for (i = 0; i < SERPENT_PARALLEL_BLOCKS - 1; i++)
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u128_xor(dst + (i + 1), dst + (i + 1), ivs + i);
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nbytes -= bsize;
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if (nbytes < bsize)
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goto done;
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u128_xor(dst, dst, src - 1);
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src -= 1;
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dst -= 1;
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} while (nbytes >= func_bytes);
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nbytes -= bsize;
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if (nbytes < bsize)
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goto done;
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u128_xor(dst, dst, src - 1);
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src -= 1;
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dst -= 1;
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} while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS);
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if (nbytes < bsize)
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goto done;
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}
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/* Handle leftovers */
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for (;;) {
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__serpent_decrypt(ctx, (u8 *)dst, (u8 *)src);
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nbytes -= bsize;
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if (nbytes < bsize)
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break;
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u128_xor(dst, dst, src - 1);
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src -= 1;
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dst -= 1;
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}
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}
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done:
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@ -249,24 +263,27 @@ static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
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return nbytes;
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}
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static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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int glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx,
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struct blkcipher_desc *desc,
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struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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const unsigned int bsize = 128 / 8;
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bool fpu_enabled = false;
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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while ((nbytes = walk.nbytes)) {
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fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes);
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nbytes = __cbc_decrypt(desc, &walk);
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fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
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desc, fpu_enabled, nbytes);
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nbytes = __glue_cbc_decrypt_128bit(gctx, desc, &walk);
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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serpent_fpu_end(fpu_enabled);
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glue_fpu_end(fpu_enabled);
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return err;
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}
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@ -289,109 +306,232 @@ static inline void u128_inc(u128 *i)
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i->a++;
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}
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static void ctr_crypt_final(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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static void glue_ctr_crypt_final_128bit(const common_glue_ctr_func_t fn_ctr,
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struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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u8 *ctrblk = walk->iv;
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u8 keystream[SERPENT_BLOCK_SIZE];
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u8 *src = walk->src.virt.addr;
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u8 *dst = walk->dst.virt.addr;
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void *ctx = crypto_blkcipher_ctx(desc->tfm);
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u8 *src = (u8 *)walk->src.virt.addr;
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u8 *dst = (u8 *)walk->dst.virt.addr;
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unsigned int nbytes = walk->nbytes;
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u128 ctrblk;
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u128 tmp;
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__serpent_encrypt(ctx, keystream, ctrblk);
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crypto_xor(keystream, src, nbytes);
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memcpy(dst, keystream, nbytes);
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be128_to_u128(&ctrblk, (be128 *)walk->iv);
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crypto_inc(ctrblk, SERPENT_BLOCK_SIZE);
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memcpy(&tmp, src, nbytes);
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fn_ctr(ctx, &tmp, &tmp, &ctrblk);
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memcpy(dst, &tmp, nbytes);
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u128_to_be128((be128 *)walk->iv, &ctrblk);
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}
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static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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static unsigned int __glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx,
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struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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const unsigned int bsize = 128 / 8;
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void *ctx = crypto_blkcipher_ctx(desc->tfm);
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unsigned int nbytes = walk->nbytes;
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u128 *src = (u128 *)walk->src.virt.addr;
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u128 *dst = (u128 *)walk->dst.virt.addr;
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u128 ctrblk;
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be128 ctrblocks[SERPENT_PARALLEL_BLOCKS];
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int i;
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unsigned int num_blocks, func_bytes;
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unsigned int i;
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be128_to_u128(&ctrblk, (be128 *)walk->iv);
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/* Process multi-block batch */
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if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) {
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do {
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/* create ctrblks for parallel encrypt */
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for (i = 0; i < SERPENT_PARALLEL_BLOCKS; i++) {
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if (dst != src)
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dst[i] = src[i];
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for (i = 0; i < gctx->num_funcs; i++) {
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num_blocks = gctx->funcs[i].num_blocks;
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func_bytes = bsize * num_blocks;
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u128_to_be128(&ctrblocks[i], &ctrblk);
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u128_inc(&ctrblk);
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}
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if (nbytes >= func_bytes) {
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do {
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gctx->funcs[i].fn_u.ctr(ctx, dst, src, &ctrblk);
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serpent_enc_blk_xway_xor(ctx, (u8 *)dst,
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(u8 *)ctrblocks);
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src += num_blocks;
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dst += num_blocks;
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nbytes -= func_bytes;
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} while (nbytes >= func_bytes);
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src += SERPENT_PARALLEL_BLOCKS;
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dst += SERPENT_PARALLEL_BLOCKS;
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nbytes -= bsize * SERPENT_PARALLEL_BLOCKS;
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} while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS);
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if (nbytes < bsize)
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goto done;
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if (nbytes < bsize)
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goto done;
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}
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}
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/* Handle leftovers */
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do {
|
||||
if (dst != src)
|
||||
*dst = *src;
|
||||
|
||||
u128_to_be128(&ctrblocks[0], &ctrblk);
|
||||
u128_inc(&ctrblk);
|
||||
|
||||
__serpent_encrypt(ctx, (u8 *)ctrblocks, (u8 *)ctrblocks);
|
||||
u128_xor(dst, dst, (u128 *)ctrblocks);
|
||||
|
||||
src += 1;
|
||||
dst += 1;
|
||||
nbytes -= bsize;
|
||||
} while (nbytes >= bsize);
|
||||
|
||||
done:
|
||||
u128_to_be128((be128 *)walk->iv, &ctrblk);
|
||||
return nbytes;
|
||||
}
|
||||
|
||||
static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
||||
struct scatterlist *src, unsigned int nbytes)
|
||||
int glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx,
|
||||
struct blkcipher_desc *desc, struct scatterlist *dst,
|
||||
struct scatterlist *src, unsigned int nbytes)
|
||||
{
|
||||
const unsigned int bsize = 128 / 8;
|
||||
bool fpu_enabled = false;
|
||||
struct blkcipher_walk walk;
|
||||
int err;
|
||||
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
err = blkcipher_walk_virt_block(desc, &walk, SERPENT_BLOCK_SIZE);
|
||||
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
||||
err = blkcipher_walk_virt_block(desc, &walk, bsize);
|
||||
|
||||
while ((nbytes = walk.nbytes) >= SERPENT_BLOCK_SIZE) {
|
||||
fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes);
|
||||
nbytes = __ctr_crypt(desc, &walk);
|
||||
while ((nbytes = walk.nbytes) >= bsize) {
|
||||
fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
|
||||
desc, fpu_enabled, nbytes);
|
||||
nbytes = __glue_ctr_crypt_128bit(gctx, desc, &walk);
|
||||
err = blkcipher_walk_done(desc, &walk, nbytes);
|
||||
}
|
||||
|
||||
serpent_fpu_end(fpu_enabled);
|
||||
glue_fpu_end(fpu_enabled);
|
||||
|
||||
if (walk.nbytes) {
|
||||
ctr_crypt_final(desc, &walk);
|
||||
glue_ctr_crypt_final_128bit(
|
||||
gctx->funcs[gctx->num_funcs - 1].fn_u.ctr, desc, &walk);
|
||||
err = blkcipher_walk_done(desc, &walk, 0);
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static void serpent_decrypt_cbc_xway(void *ctx, u128 *dst, const u128 *src)
|
||||
{
|
||||
u128 ivs[SERPENT_PARALLEL_BLOCKS - 1];
|
||||
unsigned int j;
|
||||
|
||||
for (j = 0; j < SERPENT_PARALLEL_BLOCKS - 1; j++)
|
||||
ivs[j] = src[j];
|
||||
|
||||
serpent_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
|
||||
|
||||
for (j = 0; j < SERPENT_PARALLEL_BLOCKS - 1; j++)
|
||||
u128_xor(dst + (j + 1), dst + (j + 1), ivs + j);
|
||||
}
|
||||
|
||||
static void serpent_crypt_ctr(void *ctx, u128 *dst, const u128 *src, u128 *iv)
|
||||
{
|
||||
be128 ctrblk;
|
||||
|
||||
u128_to_be128(&ctrblk, iv);
|
||||
u128_inc(iv);
|
||||
|
||||
__serpent_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
|
||||
u128_xor(dst, src, (u128 *)&ctrblk);
|
||||
}
|
||||
|
||||
static void serpent_crypt_ctr_xway(void *ctx, u128 *dst, const u128 *src,
|
||||
u128 *iv)
|
||||
{
|
||||
be128 ctrblks[SERPENT_PARALLEL_BLOCKS];
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < SERPENT_PARALLEL_BLOCKS; i++) {
|
||||
if (dst != src)
|
||||
dst[i] = src[i];
|
||||
|
||||
u128_to_be128(&ctrblks[i], iv);
|
||||
u128_inc(iv);
|
||||
}
|
||||
|
||||
serpent_enc_blk_xway_xor(ctx, (u8 *)dst, (u8 *)ctrblks);
|
||||
}
|
||||
|
||||
static const struct common_glue_ctx serpent_enc = {
|
||||
.num_funcs = 2,
|
||||
.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
|
||||
|
||||
.funcs = { {
|
||||
.num_blocks = SERPENT_PARALLEL_BLOCKS,
|
||||
.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_enc_blk_xway) }
|
||||
}, {
|
||||
.num_blocks = 1,
|
||||
.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) }
|
||||
} }
|
||||
};
|
||||
|
||||
static const struct common_glue_ctx serpent_ctr = {
|
||||
.num_funcs = 2,
|
||||
.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
|
||||
|
||||
.funcs = { {
|
||||
.num_blocks = SERPENT_PARALLEL_BLOCKS,
|
||||
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_crypt_ctr_xway) }
|
||||
}, {
|
||||
.num_blocks = 1,
|
||||
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_crypt_ctr) }
|
||||
} }
|
||||
};
|
||||
|
||||
static const struct common_glue_ctx serpent_dec = {
|
||||
.num_funcs = 2,
|
||||
.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
|
||||
|
||||
.funcs = { {
|
||||
.num_blocks = SERPENT_PARALLEL_BLOCKS,
|
||||
.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_dec_blk_xway) }
|
||||
}, {
|
||||
.num_blocks = 1,
|
||||
.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) }
|
||||
} }
|
||||
};
|
||||
|
||||
static const struct common_glue_ctx serpent_dec_cbc = {
|
||||
.num_funcs = 2,
|
||||
.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
|
||||
|
||||
.funcs = { {
|
||||
.num_blocks = SERPENT_PARALLEL_BLOCKS,
|
||||
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_decrypt_cbc_xway) }
|
||||
}, {
|
||||
.num_blocks = 1,
|
||||
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) }
|
||||
} }
|
||||
};
|
||||
|
||||
static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
||||
struct scatterlist *src, unsigned int nbytes)
|
||||
{
|
||||
return glue_ecb_crypt_128bit(&serpent_enc, desc, dst, src, nbytes);
|
||||
}
|
||||
|
||||
static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
||||
struct scatterlist *src, unsigned int nbytes)
|
||||
{
|
||||
return glue_ecb_crypt_128bit(&serpent_dec, desc, dst, src, nbytes);
|
||||
}
|
||||
|
||||
static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
||||
struct scatterlist *src, unsigned int nbytes)
|
||||
{
|
||||
return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__serpent_encrypt), desc,
|
||||
dst, src, nbytes);
|
||||
}
|
||||
|
||||
static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
||||
struct scatterlist *src, unsigned int nbytes)
|
||||
{
|
||||
return glue_cbc_decrypt_128bit(&serpent_dec_cbc, desc, dst, src,
|
||||
nbytes);
|
||||
}
|
||||
|
||||
static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
||||
struct scatterlist *src, unsigned int nbytes)
|
||||
{
|
||||
return glue_ctr_crypt_128bit(&serpent_ctr, desc, dst, src, nbytes);
|
||||
}
|
||||
|
||||
static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes)
|
||||
{
|
||||
return glue_fpu_begin(SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS,
|
||||
NULL, fpu_enabled, nbytes);
|
||||
}
|
||||
|
||||
static inline void serpent_fpu_end(bool fpu_enabled)
|
||||
{
|
||||
glue_fpu_end(fpu_enabled);
|
||||
}
|
||||
|
||||
struct crypt_priv {
|
||||
struct serpent_ctx *ctx;
|
||||
bool fpu_enabled;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user