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44893bc296
Convert the AESNI AVX and AESNI AVX2 implementations of Camellia from the (deprecated) ablkcipher and blkcipher interfaces over to the skcipher interface. Note that this includes replacing the use of ablk_helper with crypto_simd. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
326 lines
9.3 KiB
C
326 lines
9.3 KiB
C
/*
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* Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia
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*
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* Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <asm/crypto/camellia.h>
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#include <asm/crypto/glue_helper.h>
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#include <crypto/algapi.h>
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#include <crypto/internal/simd.h>
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#include <crypto/xts.h>
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#include <linux/crypto.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#define CAMELLIA_AESNI_PARALLEL_BLOCKS 16
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/* 16-way parallel cipher functions (avx/aes-ni) */
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asmlinkage void camellia_ecb_enc_16way(struct camellia_ctx *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);
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asmlinkage void camellia_ecb_dec_16way(struct camellia_ctx *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);
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asmlinkage void camellia_cbc_dec_16way(struct camellia_ctx *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);
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asmlinkage void camellia_ctr_16way(struct camellia_ctx *ctx, u8 *dst,
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const u8 *src, le128 *iv);
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EXPORT_SYMBOL_GPL(camellia_ctr_16way);
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asmlinkage void camellia_xts_enc_16way(struct camellia_ctx *ctx, u8 *dst,
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const u8 *src, le128 *iv);
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EXPORT_SYMBOL_GPL(camellia_xts_enc_16way);
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asmlinkage void camellia_xts_dec_16way(struct camellia_ctx *ctx, u8 *dst,
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const u8 *src, le128 *iv);
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EXPORT_SYMBOL_GPL(camellia_xts_dec_16way);
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void camellia_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv,
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GLUE_FUNC_CAST(camellia_enc_blk));
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}
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EXPORT_SYMBOL_GPL(camellia_xts_enc);
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void camellia_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv,
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GLUE_FUNC_CAST(camellia_dec_blk));
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}
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EXPORT_SYMBOL_GPL(camellia_xts_dec);
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static const struct common_glue_ctx camellia_enc = {
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.num_funcs = 3,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_ecb_enc_16way) }
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}, {
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.num_blocks = 2,
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.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_enc_blk_2way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_enc_blk) }
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} }
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};
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static const struct common_glue_ctx camellia_ctr = {
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.num_funcs = 3,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_ctr_16way) }
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}, {
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.num_blocks = 2,
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_crypt_ctr_2way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_crypt_ctr) }
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} }
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};
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static const struct common_glue_ctx camellia_enc_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_enc_16way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_enc) }
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} }
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};
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static const struct common_glue_ctx camellia_dec = {
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.num_funcs = 3,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_ecb_dec_16way) }
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}, {
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.num_blocks = 2,
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.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_dec_blk_2way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_dec_blk) }
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} }
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};
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static const struct common_glue_ctx camellia_dec_cbc = {
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.num_funcs = 3,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_cbc_dec_16way) }
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}, {
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.num_blocks = 2,
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_decrypt_cbc_2way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_dec_blk) }
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} }
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};
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static const struct common_glue_ctx camellia_dec_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_dec_16way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_dec) }
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} }
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};
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static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen,
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&tfm->base.crt_flags);
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}
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static int ecb_encrypt(struct skcipher_request *req)
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{
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return glue_ecb_req_128bit(&camellia_enc, req);
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}
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static int ecb_decrypt(struct skcipher_request *req)
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{
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return glue_ecb_req_128bit(&camellia_dec, req);
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}
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static int cbc_encrypt(struct skcipher_request *req)
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{
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return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(camellia_enc_blk),
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req);
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}
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static int cbc_decrypt(struct skcipher_request *req)
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{
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return glue_cbc_decrypt_req_128bit(&camellia_dec_cbc, req);
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}
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static int ctr_crypt(struct skcipher_request *req)
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{
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return glue_ctr_req_128bit(&camellia_ctr, req);
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}
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int xts_camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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u32 *flags = &tfm->base.crt_flags;
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int err;
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err = xts_verify_key(tfm, key, keylen);
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if (err)
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return err;
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/* first half of xts-key is for crypt */
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err = __camellia_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
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if (err)
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return err;
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/* second half of xts-key is for tweak */
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return __camellia_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
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flags);
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}
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EXPORT_SYMBOL_GPL(xts_camellia_setkey);
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static int xts_encrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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return glue_xts_req_128bit(&camellia_enc_xts, req,
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XTS_TWEAK_CAST(camellia_enc_blk),
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&ctx->tweak_ctx, &ctx->crypt_ctx);
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}
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static int xts_decrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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return glue_xts_req_128bit(&camellia_dec_xts, req,
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XTS_TWEAK_CAST(camellia_enc_blk),
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&ctx->tweak_ctx, &ctx->crypt_ctx);
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}
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static struct skcipher_alg camellia_algs[] = {
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{
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.base.cra_name = "__ecb(camellia)",
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.base.cra_driver_name = "__ecb-camellia-aesni",
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.base.cra_priority = 400,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct camellia_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = CAMELLIA_MIN_KEY_SIZE,
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.max_keysize = CAMELLIA_MAX_KEY_SIZE,
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.setkey = camellia_setkey,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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}, {
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.base.cra_name = "__cbc(camellia)",
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.base.cra_driver_name = "__cbc-camellia-aesni",
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.base.cra_priority = 400,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct camellia_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = CAMELLIA_MIN_KEY_SIZE,
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.max_keysize = CAMELLIA_MAX_KEY_SIZE,
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.ivsize = CAMELLIA_BLOCK_SIZE,
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.setkey = camellia_setkey,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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}, {
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.base.cra_name = "__ctr(camellia)",
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.base.cra_driver_name = "__ctr-camellia-aesni",
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.base.cra_priority = 400,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = 1,
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.base.cra_ctxsize = sizeof(struct camellia_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = CAMELLIA_MIN_KEY_SIZE,
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.max_keysize = CAMELLIA_MAX_KEY_SIZE,
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.ivsize = CAMELLIA_BLOCK_SIZE,
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.chunksize = CAMELLIA_BLOCK_SIZE,
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.setkey = camellia_setkey,
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.encrypt = ctr_crypt,
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.decrypt = ctr_crypt,
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}, {
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.base.cra_name = "__xts(camellia)",
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.base.cra_driver_name = "__xts-camellia-aesni",
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.base.cra_priority = 400,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct camellia_xts_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = 2 * CAMELLIA_MIN_KEY_SIZE,
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.max_keysize = 2 * CAMELLIA_MAX_KEY_SIZE,
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.ivsize = CAMELLIA_BLOCK_SIZE,
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.setkey = xts_camellia_setkey,
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.encrypt = xts_encrypt,
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.decrypt = xts_decrypt,
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},
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};
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static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)];
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static int __init camellia_aesni_init(void)
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{
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const char *feature_name;
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if (!boot_cpu_has(X86_FEATURE_AVX) ||
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!boot_cpu_has(X86_FEATURE_AES) ||
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!boot_cpu_has(X86_FEATURE_OSXSAVE)) {
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pr_info("AVX or AES-NI instructions are not detected.\n");
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return -ENODEV;
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}
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if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
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&feature_name)) {
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pr_info("CPU feature '%s' is not supported.\n", feature_name);
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return -ENODEV;
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}
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return simd_register_skciphers_compat(camellia_algs,
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ARRAY_SIZE(camellia_algs),
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camellia_simd_algs);
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}
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static void __exit camellia_aesni_fini(void)
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{
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simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
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camellia_simd_algs);
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}
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module_init(camellia_aesni_init);
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module_exit(camellia_aesni_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
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MODULE_ALIAS_CRYPTO("camellia");
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MODULE_ALIAS_CRYPTO("camellia-asm");
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