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author | Jussi Kivilinna <jussi.kivilinna@mbnet.fi> | 2012-06-18 14:07:29 +0300 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2012-06-27 14:42:02 +0800 |
commit | 964263afdcbf9d1e85c021acfff0cc68dd168475 (patch) | |
tree | 6a9972203d7fa212547aa1bc89098e72fc536c97 /arch/x86/crypto/camellia_glue.c | |
parent | 1d0debbd4671a8d302a11837a126d5f87db16bdc (diff) | |
download | linux-964263afdcbf9d1e85c021acfff0cc68dd168475.tar.gz linux-964263afdcbf9d1e85c021acfff0cc68dd168475.tar.bz2 linux-964263afdcbf9d1e85c021acfff0cc68dd168475.zip |
crypto: camellia-x86_64 - remove duplicated glue code and use shared glue code from glue_helper
Now that shared glue code is available, convert camellia-x86_64 to use it.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/x86/crypto/camellia_glue.c')
-rw-r--r-- | arch/x86/crypto/camellia_glue.c | 355 |
1 files changed, 86 insertions, 269 deletions
diff --git a/arch/x86/crypto/camellia_glue.c b/arch/x86/crypto/camellia_glue.c index 3306dc0b139e..eeb2b3b743e9 100644 --- a/arch/x86/crypto/camellia_glue.c +++ b/arch/x86/crypto/camellia_glue.c @@ -5,10 +5,6 @@ * * Camellia parts based on code by: * Copyright (C) 2006 NTT (Nippon Telegraph and Telephone Corporation) - * CBC & ECB parts based on code (crypto/cbc.c,ecb.c) by: - * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> - * CTR part based on code (crypto/ctr.c) by: - * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -34,9 +30,9 @@ #include <linux/module.h> #include <linux/types.h> #include <crypto/algapi.h> -#include <crypto/b128ops.h> #include <crypto/lrw.h> #include <crypto/xts.h> +#include <asm/crypto/glue_helper.h> #define CAMELLIA_MIN_KEY_SIZE 16 #define CAMELLIA_MAX_KEY_SIZE 32 @@ -1312,307 +1308,128 @@ static int camellia_setkey(struct crypto_tfm *tfm, const u8 *in_key, &tfm->crt_flags); } -static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk, - void (*fn)(struct camellia_ctx *, u8 *, const u8 *), - void (*fn_2way)(struct camellia_ctx *, u8 *, const u8 *)) +static void camellia_decrypt_cbc_2way(void *ctx, u128 *dst, const u128 *src) { - struct camellia_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - unsigned int bsize = CAMELLIA_BLOCK_SIZE; - unsigned int nbytes; - int err; - - err = blkcipher_walk_virt(desc, walk); - - while ((nbytes = walk->nbytes)) { - u8 *wsrc = walk->src.virt.addr; - u8 *wdst = walk->dst.virt.addr; - - /* Process two block batch */ - if (nbytes >= bsize * 2) { - do { - fn_2way(ctx, wdst, wsrc); - - wsrc += bsize * 2; - wdst += bsize * 2; - nbytes -= bsize * 2; - } while (nbytes >= bsize * 2); - - if (nbytes < bsize) - goto done; - } - - /* Handle leftovers */ - do { - fn(ctx, wdst, wsrc); - - wsrc += bsize; - wdst += bsize; - nbytes -= bsize; - } while (nbytes >= bsize); - -done: - err = blkcipher_walk_done(desc, walk, nbytes); - } - - return err; -} - -static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, - struct scatterlist *src, unsigned int nbytes) -{ - struct blkcipher_walk walk; - - blkcipher_walk_init(&walk, dst, src, nbytes); - return ecb_crypt(desc, &walk, camellia_enc_blk, camellia_enc_blk_2way); -} + u128 iv = *src; -static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, - struct scatterlist *src, unsigned int nbytes) -{ - struct blkcipher_walk walk; - - blkcipher_walk_init(&walk, dst, src, nbytes); - return ecb_crypt(desc, &walk, camellia_dec_blk, camellia_dec_blk_2way); -} + camellia_dec_blk_2way(ctx, (u8 *)dst, (u8 *)src); -static unsigned int __cbc_encrypt(struct blkcipher_desc *desc, - struct blkcipher_walk *walk) -{ - struct camellia_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - unsigned int bsize = CAMELLIA_BLOCK_SIZE; - unsigned int nbytes = walk->nbytes; - u128 *src = (u128 *)walk->src.virt.addr; - u128 *dst = (u128 *)walk->dst.virt.addr; - u128 *iv = (u128 *)walk->iv; - - do { - u128_xor(dst, src, iv); - camellia_enc_blk(ctx, (u8 *)dst, (u8 *)dst); - iv = dst; - - src += 1; - dst += 1; - nbytes -= bsize; - } while (nbytes >= bsize); - - u128_xor((u128 *)walk->iv, (u128 *)walk->iv, iv); - return nbytes; + u128_xor(&dst[1], &dst[1], &iv); } -static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, - struct scatterlist *src, unsigned int nbytes) +static void camellia_crypt_ctr(void *ctx, u128 *dst, const u128 *src, u128 *iv) { - struct blkcipher_walk walk; - int err; + be128 ctrblk; - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); + if (dst != src) + *dst = *src; - while ((nbytes = walk.nbytes)) { - nbytes = __cbc_encrypt(desc, &walk); - err = blkcipher_walk_done(desc, &walk, nbytes); - } + u128_to_be128(&ctrblk, iv); + u128_inc(iv); - return err; + camellia_enc_blk_xor(ctx, (u8 *)dst, (u8 *)&ctrblk); } -static unsigned int __cbc_decrypt(struct blkcipher_desc *desc, - struct blkcipher_walk *walk) +static void camellia_crypt_ctr_2way(void *ctx, u128 *dst, const u128 *src, + u128 *iv) { - struct camellia_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - unsigned int bsize = CAMELLIA_BLOCK_SIZE; - unsigned int nbytes = walk->nbytes; - u128 *src = (u128 *)walk->src.virt.addr; - u128 *dst = (u128 *)walk->dst.virt.addr; - u128 ivs[2 - 1]; - u128 last_iv; + be128 ctrblks[2]; - /* Start of the last block. */ - src += nbytes / bsize - 1; - dst += nbytes / bsize - 1; - - last_iv = *src; - - /* Process two block batch */ - if (nbytes >= bsize * 2) { - do { - nbytes -= bsize * (2 - 1); - src -= 2 - 1; - dst -= 2 - 1; - - ivs[0] = src[0]; - - camellia_dec_blk_2way(ctx, (u8 *)dst, (u8 *)src); - - u128_xor(dst + 1, dst + 1, ivs + 0); - - nbytes -= bsize; - if (nbytes < bsize) - goto done; - - u128_xor(dst, dst, src - 1); - src -= 1; - dst -= 1; - } while (nbytes >= bsize * 2); - - if (nbytes < bsize) - goto done; + if (dst != src) { + dst[0] = src[0]; + dst[1] = src[1]; } - /* Handle leftovers */ - for (;;) { - camellia_dec_blk(ctx, (u8 *)dst, (u8 *)src); - - nbytes -= bsize; - if (nbytes < bsize) - break; + u128_to_be128(&ctrblks[0], iv); + u128_inc(iv); + u128_to_be128(&ctrblks[1], iv); + u128_inc(iv); - u128_xor(dst, dst, src - 1); - src -= 1; - dst -= 1; - } - -done: - u128_xor(dst, dst, (u128 *)walk->iv); - *(u128 *)walk->iv = last_iv; - - return nbytes; + camellia_enc_blk_xor_2way(ctx, (u8 *)dst, (u8 *)ctrblks); } -static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, - struct scatterlist *src, unsigned int nbytes) -{ - struct blkcipher_walk walk; - int err; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); +static const struct common_glue_ctx camellia_enc = { + .num_funcs = 2, + .fpu_blocks_limit = -1, + + .funcs = { { + .num_blocks = 2, + .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_enc_blk_2way) } + }, { + .num_blocks = 1, + .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_enc_blk) } + } } +}; - while ((nbytes = walk.nbytes)) { - nbytes = __cbc_decrypt(desc, &walk); - err = blkcipher_walk_done(desc, &walk, nbytes); - } +static const struct common_glue_ctx camellia_ctr = { + .num_funcs = 2, + .fpu_blocks_limit = -1, + + .funcs = { { + .num_blocks = 2, + .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_crypt_ctr_2way) } + }, { + .num_blocks = 1, + .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_crypt_ctr) } + } } +}; - return err; -} +static const struct common_glue_ctx camellia_dec = { + .num_funcs = 2, + .fpu_blocks_limit = -1, + + .funcs = { { + .num_blocks = 2, + .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_dec_blk_2way) } + }, { + .num_blocks = 1, + .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_dec_blk) } + } } +}; -static inline void u128_to_be128(be128 *dst, const u128 *src) -{ - dst->a = cpu_to_be64(src->a); - dst->b = cpu_to_be64(src->b); -} +static const struct common_glue_ctx camellia_dec_cbc = { + .num_funcs = 2, + .fpu_blocks_limit = -1, + + .funcs = { { + .num_blocks = 2, + .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_decrypt_cbc_2way) } + }, { + .num_blocks = 1, + .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_dec_blk) } + } } +}; -static inline void be128_to_u128(u128 *dst, const be128 *src) +static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes) { - dst->a = be64_to_cpu(src->a); - dst->b = be64_to_cpu(src->b); + return glue_ecb_crypt_128bit(&camellia_enc, desc, dst, src, nbytes); } -static inline void u128_inc(u128 *i) +static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes) { - i->b++; - if (!i->b) - i->a++; + return glue_ecb_crypt_128bit(&camellia_dec, desc, dst, src, nbytes); } -static void ctr_crypt_final(struct blkcipher_desc *desc, - struct blkcipher_walk *walk) +static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes) { - struct camellia_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - u8 keystream[CAMELLIA_BLOCK_SIZE]; - u8 *src = walk->src.virt.addr; - u8 *dst = walk->dst.virt.addr; - unsigned int nbytes = walk->nbytes; - u128 ctrblk; - - memcpy(keystream, src, nbytes); - camellia_enc_blk_xor(ctx, keystream, walk->iv); - memcpy(dst, keystream, nbytes); - - be128_to_u128(&ctrblk, (be128 *)walk->iv); - u128_inc(&ctrblk); - u128_to_be128((be128 *)walk->iv, &ctrblk); + return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(camellia_enc_blk), desc, + dst, src, nbytes); } -static unsigned int __ctr_crypt(struct blkcipher_desc *desc, - struct blkcipher_walk *walk) +static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes) { - struct camellia_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - unsigned int bsize = CAMELLIA_BLOCK_SIZE; - unsigned int nbytes = walk->nbytes; - u128 *src = (u128 *)walk->src.virt.addr; - u128 *dst = (u128 *)walk->dst.virt.addr; - u128 ctrblk; - be128 ctrblocks[2]; - - be128_to_u128(&ctrblk, (be128 *)walk->iv); - - /* Process two block batch */ - if (nbytes >= bsize * 2) { - do { - if (dst != src) { - dst[0] = src[0]; - dst[1] = src[1]; - } - - /* create ctrblks for parallel encrypt */ - u128_to_be128(&ctrblocks[0], &ctrblk); - u128_inc(&ctrblk); - u128_to_be128(&ctrblocks[1], &ctrblk); - u128_inc(&ctrblk); - - camellia_enc_blk_xor_2way(ctx, (u8 *)dst, - (u8 *)ctrblocks); - - src += 2; - dst += 2; - nbytes -= bsize * 2; - } while (nbytes >= bsize * 2); - - if (nbytes < bsize) - goto done; - } - - /* Handle leftovers */ - do { - if (dst != src) - *dst = *src; - - u128_to_be128(&ctrblocks[0], &ctrblk); - u128_inc(&ctrblk); - - camellia_enc_blk_xor(ctx, (u8 *)dst, (u8 *)ctrblocks); - - src += 1; - dst += 1; - nbytes -= bsize; - } while (nbytes >= bsize); - -done: - u128_to_be128((be128 *)walk->iv, &ctrblk); - return nbytes; + return glue_cbc_decrypt_128bit(&camellia_dec_cbc, desc, dst, src, + nbytes); } static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { - struct blkcipher_walk walk; - int err; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt_block(desc, &walk, CAMELLIA_BLOCK_SIZE); - - while ((nbytes = walk.nbytes) >= CAMELLIA_BLOCK_SIZE) { - nbytes = __ctr_crypt(desc, &walk); - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - if (walk.nbytes) { - ctr_crypt_final(desc, &walk); - err = blkcipher_walk_done(desc, &walk, 0); - } - - return err; + return glue_ctr_crypt_128bit(&camellia_ctr, desc, dst, src, nbytes); } static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) |