diff options
| -rw-r--r-- | arch/x86/crypto/blowfish_glue.c | 107 | ||||
| -rw-r--r-- | crypto/Kconfig | 1 |
2 files changed, 1 insertions, 107 deletions
diff --git a/arch/x86/crypto/blowfish_glue.c b/arch/x86/crypto/blowfish_glue.c index cedfdba69ce3..a880e0b1c255 100644 --- a/arch/x86/crypto/blowfish_glue.c +++ b/arch/x86/crypto/blowfish_glue.c @@ -6,8 +6,6 @@ * * 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> */ #include <crypto/algapi.h> @@ -247,97 +245,6 @@ static int cbc_decrypt(struct skcipher_request *req) return err; } -static void ctr_crypt_final(struct bf_ctx *ctx, struct skcipher_walk *walk) -{ - u8 *ctrblk = walk->iv; - u8 keystream[BF_BLOCK_SIZE]; - u8 *src = walk->src.virt.addr; - u8 *dst = walk->dst.virt.addr; - unsigned int nbytes = walk->nbytes; - - blowfish_enc_blk(ctx, keystream, ctrblk); - crypto_xor_cpy(dst, keystream, src, nbytes); - - crypto_inc(ctrblk, BF_BLOCK_SIZE); -} - -static unsigned int __ctr_crypt(struct bf_ctx *ctx, struct skcipher_walk *walk) -{ - unsigned int bsize = BF_BLOCK_SIZE; - unsigned int nbytes = walk->nbytes; - u64 *src = (u64 *)walk->src.virt.addr; - u64 *dst = (u64 *)walk->dst.virt.addr; - u64 ctrblk = be64_to_cpu(*(__be64 *)walk->iv); - __be64 ctrblocks[4]; - - /* Process four block batch */ - if (nbytes >= bsize * 4) { - do { - if (dst != src) { - dst[0] = src[0]; - dst[1] = src[1]; - dst[2] = src[2]; - dst[3] = src[3]; - } - - /* create ctrblks for parallel encrypt */ - ctrblocks[0] = cpu_to_be64(ctrblk++); - ctrblocks[1] = cpu_to_be64(ctrblk++); - ctrblocks[2] = cpu_to_be64(ctrblk++); - ctrblocks[3] = cpu_to_be64(ctrblk++); - - blowfish_enc_blk_xor_4way(ctx, (u8 *)dst, - (u8 *)ctrblocks); - - src += 4; - dst += 4; - } while ((nbytes -= bsize * 4) >= bsize * 4); - - if (nbytes < bsize) - goto done; - } - - /* Handle leftovers */ - do { - if (dst != src) - *dst = *src; - - ctrblocks[0] = cpu_to_be64(ctrblk++); - - blowfish_enc_blk_xor(ctx, (u8 *)dst, (u8 *)ctrblocks); - - src += 1; - dst += 1; - } while ((nbytes -= bsize) >= bsize); - -done: - *(__be64 *)walk->iv = cpu_to_be64(ctrblk); - return nbytes; -} - -static int ctr_crypt(struct skcipher_request *req) -{ - struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - struct bf_ctx *ctx = crypto_skcipher_ctx(tfm); - struct skcipher_walk walk; - unsigned int nbytes; - int err; - - err = skcipher_walk_virt(&walk, req, false); - - while ((nbytes = walk.nbytes) >= BF_BLOCK_SIZE) { - nbytes = __ctr_crypt(ctx, &walk); - err = skcipher_walk_done(&walk, nbytes); - } - - if (nbytes) { - ctr_crypt_final(ctx, &walk); - err = skcipher_walk_done(&walk, 0); - } - - return err; -} - static struct crypto_alg bf_cipher_alg = { .cra_name = "blowfish", .cra_driver_name = "blowfish-asm", @@ -384,20 +291,6 @@ static struct skcipher_alg bf_skcipher_algs[] = { .setkey = blowfish_setkey_skcipher, .encrypt = cbc_encrypt, .decrypt = cbc_decrypt, - }, { - .base.cra_name = "ctr(blowfish)", - .base.cra_driver_name = "ctr-blowfish-asm", - .base.cra_priority = 300, - .base.cra_blocksize = 1, - .base.cra_ctxsize = sizeof(struct bf_ctx), - .base.cra_module = THIS_MODULE, - .min_keysize = BF_MIN_KEY_SIZE, - .max_keysize = BF_MAX_KEY_SIZE, - .ivsize = BF_BLOCK_SIZE, - .chunksize = BF_BLOCK_SIZE, - .setkey = blowfish_setkey_skcipher, - .encrypt = ctr_crypt, - .decrypt = ctr_crypt, }, }; diff --git a/crypto/Kconfig b/crypto/Kconfig index 5e820a57d138..24c0e001d06d 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1255,6 +1255,7 @@ config CRYPTO_BLOWFISH_X86_64 depends on X86 && 64BIT select CRYPTO_SKCIPHER select CRYPTO_BLOWFISH_COMMON + imply CRYPTO_CTR help Blowfish cipher algorithm (x86_64), by Bruce Schneier. |