crypto: serpent-sse2 - add lrw support
Patch adds LRW support for serpent-sse2 by using lrw_crypt(). Patch has been tested with tcrypt and automated filesystem tests. Tcrypt benchmarks results (serpent-sse2/serpent_generic speed ratios): Benchmark results with tcrypt: Intel Celeron T1600 (x86_64) (fam:6, model:15, step:13): size lrw-enc lrw-dec 16B 1.00x 0.96x 64B 1.01x 1.01x 256B 3.01x 2.97x 1024B 3.39x 3.33x 8192B 3.35x 3.33x AMD Phenom II 1055T (x86_64) (fam:16, model:10): size lrw-enc lrw-dec 16B 0.98x 1.03x 64B 1.01x 1.04x 256B 2.10x 2.14x 1024B 2.28x 2.33x 8192B 2.30x 2.33x Intel Atom N270 (i586): size lrw-enc lrw-dec 16B 0.97x 0.97x 64B 1.47x 1.50x 256B 1.72x 1.69x 1024B 1.88x 1.81x 8192B 1.84x 1.79x 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
251496dbfc
commit
18482053f9
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@ -39,12 +39,17 @@
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#include <crypto/cryptd.h>
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#include <crypto/b128ops.h>
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#include <crypto/ctr.h>
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#include <crypto/lrw.h>
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#include <asm/i387.h>
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#include <asm/serpent.h>
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#include <crypto/scatterwalk.h>
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#include <linux/workqueue.h>
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#include <linux/spinlock.h>
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#if defined(CONFIG_CRYPTO_LRW) || defined(CONFIG_CRYPTO_LRW_MODULE)
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#define HAS_LRW
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#endif
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struct async_serpent_ctx {
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struct cryptd_ablkcipher *cryptd_tfm;
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};
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@ -460,6 +465,152 @@ static struct crypto_alg blk_ctr_alg = {
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},
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};
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#ifdef HAS_LRW
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struct crypt_priv {
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struct serpent_ctx *ctx;
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bool fpu_enabled;
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};
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static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
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{
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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struct crypt_priv *ctx = priv;
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int i;
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ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);
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if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
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serpent_enc_blk_xway(ctx->ctx, srcdst, srcdst);
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return;
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}
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for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
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__serpent_encrypt(ctx->ctx, srcdst, srcdst);
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}
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static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
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{
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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struct crypt_priv *ctx = priv;
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int i;
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ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);
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if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
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serpent_dec_blk_xway(ctx->ctx, srcdst, srcdst);
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return;
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}
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for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
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__serpent_decrypt(ctx->ctx, srcdst, srcdst);
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}
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struct serpent_lrw_ctx {
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struct lrw_table_ctx lrw_table;
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struct serpent_ctx serpent_ctx;
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};
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static int lrw_serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
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int err;
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err = __serpent_setkey(&ctx->serpent_ctx, key, keylen -
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SERPENT_BLOCK_SIZE);
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if (err)
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return err;
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return lrw_init_table(&ctx->lrw_table, key + keylen -
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SERPENT_BLOCK_SIZE);
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}
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static int lrw_encrypt(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 serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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be128 buf[SERPENT_PARALLEL_BLOCKS];
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struct crypt_priv crypt_ctx = {
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.ctx = &ctx->serpent_ctx,
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.fpu_enabled = false,
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};
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struct lrw_crypt_req req = {
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.tbuf = buf,
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.tbuflen = sizeof(buf),
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.table_ctx = &ctx->lrw_table,
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.crypt_ctx = &crypt_ctx,
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.crypt_fn = encrypt_callback,
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};
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int ret;
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ret = lrw_crypt(desc, dst, src, nbytes, &req);
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serpent_fpu_end(crypt_ctx.fpu_enabled);
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return ret;
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}
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static int lrw_decrypt(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 serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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be128 buf[SERPENT_PARALLEL_BLOCKS];
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struct crypt_priv crypt_ctx = {
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.ctx = &ctx->serpent_ctx,
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.fpu_enabled = false,
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};
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struct lrw_crypt_req req = {
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.tbuf = buf,
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.tbuflen = sizeof(buf),
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.table_ctx = &ctx->lrw_table,
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.crypt_ctx = &crypt_ctx,
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.crypt_fn = decrypt_callback,
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};
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int ret;
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ret = lrw_crypt(desc, dst, src, nbytes, &req);
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serpent_fpu_end(crypt_ctx.fpu_enabled);
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return ret;
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}
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static void lrw_exit_tfm(struct crypto_tfm *tfm)
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{
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struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
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lrw_free_table(&ctx->lrw_table);
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}
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static struct crypto_alg blk_lrw_alg = {
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.cra_name = "__lrw-serpent-sse2",
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.cra_driver_name = "__driver-lrw-serpent-sse2",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = SERPENT_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct serpent_lrw_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_list = LIST_HEAD_INIT(blk_lrw_alg.cra_list),
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.cra_exit = lrw_exit_tfm,
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.cra_u = {
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.blkcipher = {
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.min_keysize = SERPENT_MIN_KEY_SIZE +
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SERPENT_BLOCK_SIZE,
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.max_keysize = SERPENT_MAX_KEY_SIZE +
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SERPENT_BLOCK_SIZE,
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.ivsize = SERPENT_BLOCK_SIZE,
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.setkey = lrw_serpent_setkey,
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.encrypt = lrw_encrypt,
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.decrypt = lrw_decrypt,
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},
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},
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};
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#endif
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static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
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unsigned int key_len)
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{
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@ -658,6 +809,48 @@ static struct crypto_alg ablk_ctr_alg = {
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},
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};
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#ifdef HAS_LRW
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static int ablk_lrw_init(struct crypto_tfm *tfm)
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{
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struct cryptd_ablkcipher *cryptd_tfm;
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cryptd_tfm = cryptd_alloc_ablkcipher("__driver-lrw-serpent-sse2", 0, 0);
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if (IS_ERR(cryptd_tfm))
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return PTR_ERR(cryptd_tfm);
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ablk_init_common(tfm, cryptd_tfm);
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return 0;
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}
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static struct crypto_alg ablk_lrw_alg = {
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.cra_name = "lrw(serpent)",
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.cra_driver_name = "lrw-serpent-sse2",
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.cra_priority = 400,
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
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.cra_blocksize = SERPENT_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct async_serpent_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_ablkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_list = LIST_HEAD_INIT(ablk_lrw_alg.cra_list),
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.cra_init = ablk_lrw_init,
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.cra_exit = ablk_exit,
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.cra_u = {
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.ablkcipher = {
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.min_keysize = SERPENT_MIN_KEY_SIZE +
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SERPENT_BLOCK_SIZE,
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.max_keysize = SERPENT_MAX_KEY_SIZE +
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SERPENT_BLOCK_SIZE,
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.ivsize = SERPENT_BLOCK_SIZE,
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.setkey = ablk_set_key,
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.encrypt = ablk_encrypt,
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.decrypt = ablk_decrypt,
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},
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},
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};
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#endif
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static int __init serpent_sse2_init(void)
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{
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int err;
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@ -685,8 +878,22 @@ static int __init serpent_sse2_init(void)
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err = crypto_register_alg(&ablk_ctr_alg);
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if (err)
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goto ablk_ctr_err;
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#ifdef HAS_LRW
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err = crypto_register_alg(&blk_lrw_alg);
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if (err)
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goto blk_lrw_err;
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err = crypto_register_alg(&ablk_lrw_alg);
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if (err)
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goto ablk_lrw_err;
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#endif
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return err;
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#ifdef HAS_LRW
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ablk_lrw_err:
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crypto_unregister_alg(&blk_lrw_alg);
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blk_lrw_err:
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crypto_unregister_alg(&ablk_ctr_alg);
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#endif
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ablk_ctr_err:
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crypto_unregister_alg(&ablk_cbc_alg);
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ablk_cbc_err:
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@ -703,6 +910,10 @@ blk_ecb_err:
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static void __exit serpent_sse2_exit(void)
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{
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#ifdef HAS_LRW
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crypto_unregister_alg(&ablk_lrw_alg);
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crypto_unregister_alg(&blk_lrw_alg);
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#endif
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crypto_unregister_alg(&ablk_ctr_alg);
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crypto_unregister_alg(&ablk_cbc_alg);
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crypto_unregister_alg(&ablk_ecb_alg);
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@ -206,9 +206,9 @@
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x1 ^= x4; x3 ^= x4; x4 &= x0; \
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x4 ^= x2;
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int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
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int __serpent_setkey(struct serpent_ctx *ctx, const u8 *key,
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unsigned int keylen)
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{
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struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
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u32 *k = ctx->expkey;
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u8 *k8 = (u8 *)k;
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u32 r0,r1,r2,r3,r4;
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@ -349,6 +349,12 @@ int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
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return 0;
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}
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EXPORT_SYMBOL_GPL(__serpent_setkey);
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int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
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{
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return __serpent_setkey(crypto_tfm_ctx(tfm), key, keylen);
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}
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EXPORT_SYMBOL_GPL(serpent_setkey);
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void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)
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@ -17,6 +17,8 @@ struct serpent_ctx {
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u32 expkey[SERPENT_EXPKEY_WORDS];
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};
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int __serpent_setkey(struct serpent_ctx *ctx, const u8 *key,
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unsigned int keylen);
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int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen);
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void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src);
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