crypto: blowfish - add x86_64 assembly implementation
Patch adds x86_64 assembly implementation of blowfish. Two set of assembler functions are provided. First set is regular 'one-block at time' encrypt/decrypt functions. Second is 'four-block at time' functions that gain performance increase on out-of-order CPUs. Performance of 4-way functions should be equal to 1-way functions with in-order CPUs. Summary of the tcrypt benchmarks: Blowfish assembler vs blowfish C (256bit 8kb block ECB) encrypt: 2.2x speed decrypt: 2.3x speed Blowfish assembler vs blowfish C (256bit 8kb block CBC) encrypt: 1.12x speed decrypt: 2.5x speed Blowfish assembler vs blowfish C (256bit 8kb block CTR) encrypt: 2.5x speed Full output: http://koti.mbnet.fi/axh/kernel/crypto/tcrypt-speed-blowfish-asm-x86_64.txt http://koti.mbnet.fi/axh/kernel/crypto/tcrypt-speed-blowfish-c-x86_64.txt Tests were run on: vendor_id : AuthenticAMD cpu family : 16 model : 10 model name : AMD Phenom(tm) II X6 1055T Processor stepping : 0 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
7d47b86cfe
commit
64b94ceae8
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@ -7,6 +7,7 @@ obj-$(CONFIG_CRYPTO_TWOFISH_586) += twofish-i586.o
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obj-$(CONFIG_CRYPTO_SALSA20_586) += salsa20-i586.o
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obj-$(CONFIG_CRYPTO_AES_X86_64) += aes-x86_64.o
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obj-$(CONFIG_CRYPTO_BLOWFISH_X86_64) += blowfish-x86_64.o
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obj-$(CONFIG_CRYPTO_TWOFISH_X86_64) += twofish-x86_64.o
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obj-$(CONFIG_CRYPTO_SALSA20_X86_64) += salsa20-x86_64.o
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obj-$(CONFIG_CRYPTO_AES_NI_INTEL) += aesni-intel.o
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@ -20,6 +21,7 @@ twofish-i586-y := twofish-i586-asm_32.o twofish_glue.o
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salsa20-i586-y := salsa20-i586-asm_32.o salsa20_glue.o
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aes-x86_64-y := aes-x86_64-asm_64.o aes_glue.o
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blowfish-x86_64-y := blowfish-x86_64-asm_64.o blowfish_glue.o
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twofish-x86_64-y := twofish-x86_64-asm_64.o twofish_glue.o
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salsa20-x86_64-y := salsa20-x86_64-asm_64.o salsa20_glue.o
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@ -0,0 +1,392 @@
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/*
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* Blowfish Cipher Algorithm (x86_64)
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*
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* Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*/
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.file "blowfish-x86_64-asm.S"
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.text
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/* structure of crypto context */
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#define p 0
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#define s0 ((16 + 2) * 4)
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#define s1 ((16 + 2 + (1 * 256)) * 4)
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#define s2 ((16 + 2 + (2 * 256)) * 4)
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#define s3 ((16 + 2 + (3 * 256)) * 4)
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/* register macros */
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#define CTX %rdi
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#define RIO %rsi
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#define RX0 %rax
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#define RX1 %rbx
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#define RX2 %rcx
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#define RX3 %rdx
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#define RX0d %eax
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#define RX1d %ebx
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#define RX2d %ecx
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#define RX3d %edx
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#define RX0bl %al
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#define RX1bl %bl
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#define RX2bl %cl
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#define RX3bl %dl
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#define RX0bh %ah
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#define RX1bh %bh
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#define RX2bh %ch
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#define RX3bh %dh
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#define RT0 %rbp
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#define RT1 %rsi
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#define RT0d %ebp
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#define RT1d %esi
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#define RK0 %r8
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#define RK1 %r9
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#define RK2 %r10
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#define RK3 %r11
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#define RK0d %r8d
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#define RK1d %r9d
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#define RK2d %r10d
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#define RK3d %r11d
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#define RKEY %r12
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/***********************************************************************
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* 1-way blowfish
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***********************************************************************/
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#define F(x, k) \
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rorq $16, x; \
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movzbl x ## bh, RT0d; \
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movzbl x ## bl, RT1d; \
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rolq $16, x; \
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movl s0(CTX,RT0,4), k ## d; \
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addl s1(CTX,RT1,4), k ## d; \
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movzbl x ## bh, RT0d; \
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movzbl x ## bl, RT1d; \
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rolq $32, x; \
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xorl s2(CTX,RT0,4), k ## d; \
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addl s3(CTX,RT1,4), k ## d; \
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xorq k, x;
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#define add_roundkey_enc(n) \
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xorq p+4*(n)(CTX), RX0;
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#define round_enc(n) \
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add_roundkey_enc(n); \
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\
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F(RX0, RK0); \
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F(RX0, RK0);
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#define round_final_enc(n) \
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xorq p+4*(n)(CTX), RX0;
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#define add_roundkey_dec(n) \
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movq p+4*(n-1)(CTX), RT0; \
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rorq $32, RT0; \
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xorq RT0, RX0;
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#define round_dec(n) \
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add_roundkey_dec(n); \
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\
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F(RX0, RK0); \
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F(RX0, RK0); \
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#define read_block() \
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movq (RIO), RX0; \
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rorq $32, RX0; \
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bswapq RX0;
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#define write_block() \
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bswapq RX0; \
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movq RX0, (RIO);
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#define xor_block() \
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bswapq RX0; \
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xorq RX0, (RIO);
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.align 8
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.global __blowfish_enc_blk
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.type __blowfish_enc_blk,@function;
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__blowfish_enc_blk:
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// input:
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// %rdi: ctx, CTX
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// %rsi: dst
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// %rdx: src
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// %rcx: bool xor
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pushq %rbp;
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pushq %rbx;
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pushq %rsi;
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pushq %rcx;
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movq %rdx, RIO;
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read_block();
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round_enc(0);
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round_enc(2);
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round_enc(4);
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round_enc(6);
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round_enc(8);
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round_enc(10);
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round_enc(12);
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round_enc(14);
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add_roundkey_enc(16);
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popq %rbp;
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popq RIO;
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test %bpl, %bpl;
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jnz __enc_xor;
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write_block();
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__enc_ret:
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popq %rbx;
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popq %rbp;
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ret;
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__enc_xor:
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xor_block();
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jmp __enc_ret;
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.align 8
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.global blowfish_dec_blk
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.type blowfish_dec_blk,@function;
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blowfish_dec_blk:
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// input:
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// %rdi: ctx, CTX
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// %rsi: dst
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// %rdx: src
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pushq %rbp;
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pushq %rbx;
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pushq %rsi;
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movq %rdx, RIO;
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read_block();
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round_dec(17);
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round_dec(15);
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round_dec(13);
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round_dec(11);
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round_dec(9);
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round_dec(7);
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round_dec(5);
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round_dec(3);
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add_roundkey_dec(1);
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popq RIO;
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write_block();
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popq %rbx;
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popq %rbp;
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ret;
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/**********************************************************************
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4-way blowfish, four blocks parallel
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**********************************************************************/
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#define add_preloaded_roundkey4() \
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xorq RKEY, RX0; \
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xorq RKEY, RX1; \
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xorq RKEY, RX2; \
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xorq RKEY, RX3;
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#define preload_roundkey_enc(n) \
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movq p+4*(n)(CTX), RKEY;
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#define add_roundkey_enc4(n) \
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add_preloaded_roundkey4(); \
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preload_roundkey_enc(n + 2);
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#define round_enc4(n) \
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add_roundkey_enc4(n); \
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\
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F(RX0, RK0); \
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F(RX1, RK1); \
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F(RX2, RK2); \
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F(RX3, RK3); \
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\
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F(RX0, RK0); \
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F(RX1, RK1); \
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F(RX2, RK2); \
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F(RX3, RK3);
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#define preload_roundkey_dec(n) \
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movq p+4*((n)-1)(CTX), RKEY; \
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rorq $32, RKEY;
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#define add_roundkey_dec4(n) \
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add_preloaded_roundkey4(); \
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preload_roundkey_dec(n - 2);
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#define round_dec4(n) \
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add_roundkey_dec4(n); \
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\
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F(RX0, RK0); \
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F(RX1, RK1); \
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F(RX2, RK2); \
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F(RX3, RK3); \
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\
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F(RX0, RK0); \
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F(RX1, RK1); \
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F(RX2, RK2); \
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F(RX3, RK3);
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#define read_block4() \
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movq (RIO), RX0; \
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rorq $32, RX0; \
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bswapq RX0; \
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\
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movq 8(RIO), RX1; \
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rorq $32, RX1; \
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bswapq RX1; \
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\
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movq 16(RIO), RX2; \
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rorq $32, RX2; \
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bswapq RX2; \
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\
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movq 24(RIO), RX3; \
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rorq $32, RX3; \
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bswapq RX3;
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#define write_block4() \
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bswapq RX0; \
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movq RX0, (RIO); \
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\
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bswapq RX1; \
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movq RX1, 8(RIO); \
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\
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bswapq RX2; \
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movq RX2, 16(RIO); \
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\
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bswapq RX3; \
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movq RX3, 24(RIO);
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#define xor_block4() \
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bswapq RX0; \
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xorq RX0, (RIO); \
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\
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bswapq RX1; \
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xorq RX1, 8(RIO); \
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\
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bswapq RX2; \
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xorq RX2, 16(RIO); \
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\
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bswapq RX3; \
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xorq RX3, 24(RIO);
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.align 8
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.global __blowfish_enc_blk_4way
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.type __blowfish_enc_blk_4way,@function;
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__blowfish_enc_blk_4way:
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// input:
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// %rdi: ctx, CTX
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// %rsi: dst
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// %rdx: src
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// %rcx: bool xor
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pushq %rbp;
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pushq %rbx;
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pushq RKEY;
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preload_roundkey_enc(0);
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pushq %rsi;
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pushq %rcx;
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movq %rdx, RIO;
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read_block4();
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round_enc4(0);
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round_enc4(2);
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round_enc4(4);
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round_enc4(6);
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round_enc4(8);
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round_enc4(10);
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round_enc4(12);
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round_enc4(14);
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add_preloaded_roundkey4();
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popq %rbp;
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popq RIO;
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test %bpl, %bpl;
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jnz __enc_xor4;
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write_block4();
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__enc_ret4:
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popq RKEY;
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popq %rbx;
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popq %rbp;
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ret;
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__enc_xor4:
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xor_block4();
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jmp __enc_ret4;
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.align 8
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.global blowfish_dec_blk_4way
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.type blowfish_dec_blk_4way,@function;
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blowfish_dec_blk_4way:
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// input:
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// %rdi: ctx, CTX
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// %rsi: dst
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// %rdx: src
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pushq %rbp;
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pushq %rbx;
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pushq RKEY;
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preload_roundkey_dec(17);
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pushq %rsi;
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movq %rdx, RIO;
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read_block4();
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round_dec4(17);
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round_dec4(15);
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round_dec4(13);
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round_dec4(11);
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round_dec4(9);
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round_dec4(7);
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round_dec4(5);
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round_dec4(3);
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add_preloaded_roundkey4();
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popq RIO;
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write_block4();
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popq RKEY;
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popq %rbx;
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popq %rbp;
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ret;
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@ -0,0 +1,487 @@
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/*
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* Glue Code for assembler optimized version of Blowfish
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*
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* Copyright (c) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
|
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*
|
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* You should have received a copy of the GNU General Public License
|
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* along with this program; if not, write to the Free Software
|
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*/
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#include <crypto/blowfish.h>
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#include <linux/crypto.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <crypto/algapi.h>
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/* regular block cipher functions */
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asmlinkage void __blowfish_enc_blk(struct bf_ctx *ctx, u8 *dst, const u8 *src,
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bool xor);
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asmlinkage void blowfish_dec_blk(struct bf_ctx *ctx, u8 *dst, const u8 *src);
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/* 4-way parallel cipher functions */
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asmlinkage void __blowfish_enc_blk_4way(struct bf_ctx *ctx, u8 *dst,
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const u8 *src, bool xor);
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asmlinkage void blowfish_dec_blk_4way(struct bf_ctx *ctx, u8 *dst,
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const u8 *src);
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static inline void blowfish_enc_blk(struct bf_ctx *ctx, u8 *dst, const u8 *src)
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{
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__blowfish_enc_blk(ctx, dst, src, false);
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}
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static inline void blowfish_enc_blk_xor(struct bf_ctx *ctx, u8 *dst,
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const u8 *src)
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{
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__blowfish_enc_blk(ctx, dst, src, true);
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}
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static inline void blowfish_enc_blk_4way(struct bf_ctx *ctx, u8 *dst,
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const u8 *src)
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{
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__blowfish_enc_blk_4way(ctx, dst, src, false);
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}
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static inline void blowfish_enc_blk_xor_4way(struct bf_ctx *ctx, u8 *dst,
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const u8 *src)
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{
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__blowfish_enc_blk_4way(ctx, dst, src, true);
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}
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static void blowfish_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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blowfish_enc_blk(crypto_tfm_ctx(tfm), dst, src);
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}
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static void blowfish_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
|
||||
blowfish_dec_blk(crypto_tfm_ctx(tfm), dst, src);
|
||||
}
|
||||
|
||||
static struct crypto_alg bf_alg = {
|
||||
.cra_name = "blowfish",
|
||||
.cra_driver_name = "blowfish-asm",
|
||||
.cra_priority = 200,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
|
||||
.cra_blocksize = BF_BLOCK_SIZE,
|
||||
.cra_ctxsize = sizeof(struct bf_ctx),
|
||||
.cra_alignmask = 3,
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_list = LIST_HEAD_INIT(bf_alg.cra_list),
|
||||
.cra_u = {
|
||||
.cipher = {
|
||||
.cia_min_keysize = BF_MIN_KEY_SIZE,
|
||||
.cia_max_keysize = BF_MAX_KEY_SIZE,
|
||||
.cia_setkey = blowfish_setkey,
|
||||
.cia_encrypt = blowfish_encrypt,
|
||||
.cia_decrypt = blowfish_decrypt,
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
|
||||
void (*fn)(struct bf_ctx *, u8 *, const u8 *),
|
||||
void (*fn_4way)(struct bf_ctx *, u8 *, const u8 *))
|
||||
{
|
||||
struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
unsigned int bsize = BF_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 four block batch */
|
||||
if (nbytes >= bsize * 4) {
|
||||
do {
|
||||
fn_4way(ctx, wdst, wsrc);
|
||||
|
||||
wsrc += bsize * 4;
|
||||
wdst += bsize * 4;
|
||||
nbytes -= bsize * 4;
|
||||
} while (nbytes >= bsize * 4);
|
||||
|
||||
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, blowfish_enc_blk, blowfish_enc_blk_4way);
|
||||
}
|
||||
|
||||
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, blowfish_dec_blk, blowfish_dec_blk_4way);
|
||||
}
|
||||
|
||||
static struct crypto_alg blk_ecb_alg = {
|
||||
.cra_name = "ecb(blowfish)",
|
||||
.cra_driver_name = "ecb-blowfish-asm",
|
||||
.cra_priority = 300,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
||||
.cra_blocksize = BF_BLOCK_SIZE,
|
||||
.cra_ctxsize = sizeof(struct bf_ctx),
|
||||
.cra_alignmask = 0,
|
||||
.cra_type = &crypto_blkcipher_type,
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_list = LIST_HEAD_INIT(blk_ecb_alg.cra_list),
|
||||
.cra_u = {
|
||||
.blkcipher = {
|
||||
.min_keysize = BF_MIN_KEY_SIZE,
|
||||
.max_keysize = BF_MAX_KEY_SIZE,
|
||||
.setkey = blowfish_setkey,
|
||||
.encrypt = ecb_encrypt,
|
||||
.decrypt = ecb_decrypt,
|
||||
},
|
||||
},
|
||||
};
|
||||
|
||||
static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
|
||||
struct blkcipher_walk *walk)
|
||||
{
|
||||
struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
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 *iv = (u64 *)walk->iv;
|
||||
|
||||
do {
|
||||
*dst = *src ^ *iv;
|
||||
blowfish_enc_blk(ctx, (u8 *)dst, (u8 *)dst);
|
||||
iv = dst;
|
||||
|
||||
src += 1;
|
||||
dst += 1;
|
||||
nbytes -= bsize;
|
||||
} while (nbytes >= bsize);
|
||||
|
||||
*(u64 *)walk->iv = *iv;
|
||||
return nbytes;
|
||||
}
|
||||
|
||||
static int cbc_encrypt(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);
|
||||
|
||||
while ((nbytes = walk.nbytes)) {
|
||||
nbytes = __cbc_encrypt(desc, &walk);
|
||||
err = blkcipher_walk_done(desc, &walk, nbytes);
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
|
||||
struct blkcipher_walk *walk)
|
||||
{
|
||||
struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
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 ivs[4 - 1];
|
||||
u64 last_iv;
|
||||
|
||||
/* Start of the last block. */
|
||||
src += nbytes / bsize - 1;
|
||||
dst += nbytes / bsize - 1;
|
||||
|
||||
last_iv = *src;
|
||||
|
||||
/* Process four block batch */
|
||||
if (nbytes >= bsize * 4) {
|
||||
do {
|
||||
nbytes -= bsize * 4 - bsize;
|
||||
src -= 4 - 1;
|
||||
dst -= 4 - 1;
|
||||
|
||||
ivs[0] = src[0];
|
||||
ivs[1] = src[1];
|
||||
ivs[2] = src[2];
|
||||
|
||||
blowfish_dec_blk_4way(ctx, (u8 *)dst, (u8 *)src);
|
||||
|
||||
dst[1] ^= ivs[0];
|
||||
dst[2] ^= ivs[1];
|
||||
dst[3] ^= ivs[2];
|
||||
|
||||
nbytes -= bsize;
|
||||
if (nbytes < bsize)
|
||||
goto done;
|
||||
|
||||
*dst ^= *(src - 1);
|
||||
src -= 1;
|
||||
dst -= 1;
|
||||
} while (nbytes >= bsize * 4);
|
||||
|
||||
if (nbytes < bsize)
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* Handle leftovers */
|
||||
for (;;) {
|
||||
blowfish_dec_blk(ctx, (u8 *)dst, (u8 *)src);
|
||||
|
||||
nbytes -= bsize;
|
||||
if (nbytes < bsize)
|
||||
break;
|
||||
|
||||
*dst ^= *(src - 1);
|
||||
src -= 1;
|
||||
dst -= 1;
|
||||
}
|
||||
|
||||
done:
|
||||
*dst ^= *(u64 *)walk->iv;
|
||||
*(u64 *)walk->iv = last_iv;
|
||||
|
||||
return nbytes;
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
while ((nbytes = walk.nbytes)) {
|
||||
nbytes = __cbc_decrypt(desc, &walk);
|
||||
err = blkcipher_walk_done(desc, &walk, nbytes);
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct crypto_alg blk_cbc_alg = {
|
||||
.cra_name = "cbc(blowfish)",
|
||||
.cra_driver_name = "cbc-blowfish-asm",
|
||||
.cra_priority = 300,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
||||
.cra_blocksize = BF_BLOCK_SIZE,
|
||||
.cra_ctxsize = sizeof(struct bf_ctx),
|
||||
.cra_alignmask = 0,
|
||||
.cra_type = &crypto_blkcipher_type,
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_list = LIST_HEAD_INIT(blk_cbc_alg.cra_list),
|
||||
.cra_u = {
|
||||
.blkcipher = {
|
||||
.min_keysize = BF_MIN_KEY_SIZE,
|
||||
.max_keysize = BF_MAX_KEY_SIZE,
|
||||
.ivsize = BF_BLOCK_SIZE,
|
||||
.setkey = blowfish_setkey,
|
||||
.encrypt = cbc_encrypt,
|
||||
.decrypt = cbc_decrypt,
|
||||
},
|
||||
},
|
||||
};
|
||||
|
||||
static void ctr_crypt_final(struct bf_ctx *ctx, struct blkcipher_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(keystream, src, nbytes);
|
||||
memcpy(dst, keystream, nbytes);
|
||||
|
||||
crypto_inc(ctrblk, BF_BLOCK_SIZE);
|
||||
}
|
||||
|
||||
static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
|
||||
struct blkcipher_walk *walk)
|
||||
{
|
||||
struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
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 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, BF_BLOCK_SIZE);
|
||||
|
||||
while ((nbytes = walk.nbytes) >= BF_BLOCK_SIZE) {
|
||||
nbytes = __ctr_crypt(desc, &walk);
|
||||
err = blkcipher_walk_done(desc, &walk, nbytes);
|
||||
}
|
||||
|
||||
if (walk.nbytes) {
|
||||
ctr_crypt_final(crypto_blkcipher_ctx(desc->tfm), &walk);
|
||||
err = blkcipher_walk_done(desc, &walk, 0);
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct crypto_alg blk_ctr_alg = {
|
||||
.cra_name = "ctr(blowfish)",
|
||||
.cra_driver_name = "ctr-blowfish-asm",
|
||||
.cra_priority = 300,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
||||
.cra_blocksize = BF_BLOCK_SIZE,
|
||||
.cra_ctxsize = sizeof(struct bf_ctx),
|
||||
.cra_alignmask = 0,
|
||||
.cra_type = &crypto_blkcipher_type,
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_list = LIST_HEAD_INIT(blk_ctr_alg.cra_list),
|
||||
.cra_u = {
|
||||
.blkcipher = {
|
||||
.min_keysize = BF_MIN_KEY_SIZE,
|
||||
.max_keysize = BF_MAX_KEY_SIZE,
|
||||
.ivsize = BF_BLOCK_SIZE,
|
||||
.setkey = blowfish_setkey,
|
||||
.encrypt = ctr_crypt,
|
||||
.decrypt = ctr_crypt,
|
||||
},
|
||||
},
|
||||
};
|
||||
|
||||
static int __init init(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
err = crypto_register_alg(&bf_alg);
|
||||
if (err)
|
||||
goto bf_err;
|
||||
err = crypto_register_alg(&blk_ecb_alg);
|
||||
if (err)
|
||||
goto ecb_err;
|
||||
err = crypto_register_alg(&blk_cbc_alg);
|
||||
if (err)
|
||||
goto cbc_err;
|
||||
err = crypto_register_alg(&blk_ctr_alg);
|
||||
if (err)
|
||||
goto ctr_err;
|
||||
|
||||
return 0;
|
||||
|
||||
ctr_err:
|
||||
crypto_unregister_alg(&blk_cbc_alg);
|
||||
cbc_err:
|
||||
crypto_unregister_alg(&blk_ecb_alg);
|
||||
ecb_err:
|
||||
crypto_unregister_alg(&bf_alg);
|
||||
bf_err:
|
||||
return err;
|
||||
}
|
||||
|
||||
static void __exit fini(void)
|
||||
{
|
||||
crypto_unregister_alg(&blk_ctr_alg);
|
||||
crypto_unregister_alg(&blk_cbc_alg);
|
||||
crypto_unregister_alg(&blk_ecb_alg);
|
||||
crypto_unregister_alg(&bf_alg);
|
||||
}
|
||||
|
||||
module_init(init);
|
||||
module_exit(fini);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Blowfish Cipher Algorithm, asm optimized");
|
||||
MODULE_ALIAS("blowfish");
|
||||
MODULE_ALIAS("blowfish-asm");
|
||||
|
|
@ -620,6 +620,21 @@ config CRYPTO_BLOWFISH_COMMON
|
|||
See also:
|
||||
<http://www.schneier.com/blowfish.html>
|
||||
|
||||
config CRYPTO_BLOWFISH_X86_64
|
||||
tristate "Blowfish cipher algorithm (x86_64)"
|
||||
depends on (X86 || UML_X86) && 64BIT
|
||||
select CRYPTO_ALGAPI
|
||||
select CRYPTO_BLOWFISH_COMMON
|
||||
help
|
||||
Blowfish cipher algorithm (x86_64), by Bruce Schneier.
|
||||
|
||||
This is a variable key length cipher which can use keys from 32
|
||||
bits to 448 bits in length. It's fast, simple and specifically
|
||||
designed for use on "large microprocessors".
|
||||
|
||||
See also:
|
||||
<http://www.schneier.com/blowfish.html>
|
||||
|
||||
config CRYPTO_CAMELLIA
|
||||
tristate "Camellia cipher algorithms"
|
||||
depends on CRYPTO
|
||||
|
|
|
|||
Reference in New Issue