diff options
| -rw-r--r-- | arch/x86/crypto/aesni-intel_asm.S | 280 | ||||
| -rw-r--r-- | arch/x86/crypto/aesni-intel_glue.c | 220 | ||||
| -rw-r--r-- | crypto/Kconfig | 1 |
3 files changed, 356 insertions, 145 deletions
diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S index 84d8a156cdcd..4e3972570916 100644 --- a/arch/x86/crypto/aesni-intel_asm.S +++ b/arch/x86/crypto/aesni-intel_asm.S @@ -43,10 +43,6 @@ #ifdef __x86_64__ # constants in mergeable sections, linker can reorder and merge -.section .rodata.cst16.gf128mul_x_ble_mask, "aM", @progbits, 16 -.align 16 -.Lgf128mul_x_ble_mask: - .octa 0x00000000000000010000000000000087 .section .rodata.cst16.POLY, "aM", @progbits, 16 .align 16 POLY: .octa 0xC2000000000000000000000000000001 @@ -146,7 +142,7 @@ ALL_F: .octa 0xffffffffffffffffffffffffffffffff #define CTR %xmm11 #define INC %xmm12 -#define GF128MUL_MASK %xmm10 +#define GF128MUL_MASK %xmm7 #ifdef __x86_64__ #define AREG %rax @@ -2823,6 +2819,14 @@ SYM_FUNC_START(aesni_ctr_enc) ret SYM_FUNC_END(aesni_ctr_enc) +#endif + +.section .rodata.cst16.gf128mul_x_ble_mask, "aM", @progbits, 16 +.align 16 +.Lgf128mul_x_ble_mask: + .octa 0x00000000000000010000000000000087 +.previous + /* * _aesni_gf128mul_x_ble: internal ABI * Multiply in GF(2^128) for XTS IVs @@ -2835,11 +2839,11 @@ SYM_FUNC_END(aesni_ctr_enc) * CTR: == temporary value */ #define _aesni_gf128mul_x_ble() \ - pshufd $0x13, IV, CTR; \ + pshufd $0x13, IV, KEY; \ paddq IV, IV; \ - psrad $31, CTR; \ - pand GF128MUL_MASK, CTR; \ - pxor CTR, IV; + psrad $31, KEY; \ + pand GF128MUL_MASK, KEY; \ + pxor KEY, IV; /* * void aesni_xts_encrypt(const struct crypto_aes_ctx *ctx, u8 *dst, @@ -2847,65 +2851,153 @@ SYM_FUNC_END(aesni_ctr_enc) */ SYM_FUNC_START(aesni_xts_encrypt) FRAME_BEGIN - +#ifndef __x86_64__ + pushl IVP + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+20)(%esp), KEYP # ctx + movl (FRAME_OFFSET+24)(%esp), OUTP # dst + movl (FRAME_OFFSET+28)(%esp), INP # src + movl (FRAME_OFFSET+32)(%esp), LEN # len + movl (FRAME_OFFSET+36)(%esp), IVP # iv movdqa .Lgf128mul_x_ble_mask, GF128MUL_MASK +#else + movdqa .Lgf128mul_x_ble_mask(%rip), GF128MUL_MASK +#endif movups (IVP), IV mov 480(KEYP), KLEN .Lxts_enc_loop4: + sub $64, LEN + jl .Lxts_enc_1x + movdqa IV, STATE1 - movdqu 0x00(INP), INC - pxor INC, STATE1 + movdqu 0x00(INP), IN + pxor IN, STATE1 movdqu IV, 0x00(OUTP) _aesni_gf128mul_x_ble() movdqa IV, STATE2 - movdqu 0x10(INP), INC - pxor INC, STATE2 + movdqu 0x10(INP), IN + pxor IN, STATE2 movdqu IV, 0x10(OUTP) _aesni_gf128mul_x_ble() movdqa IV, STATE3 - movdqu 0x20(INP), INC - pxor INC, STATE3 + movdqu 0x20(INP), IN + pxor IN, STATE3 movdqu IV, 0x20(OUTP) _aesni_gf128mul_x_ble() movdqa IV, STATE4 - movdqu 0x30(INP), INC - pxor INC, STATE4 + movdqu 0x30(INP), IN + pxor IN, STATE4 movdqu IV, 0x30(OUTP) call _aesni_enc4 - movdqu 0x00(OUTP), INC - pxor INC, STATE1 + movdqu 0x00(OUTP), IN + pxor IN, STATE1 movdqu STATE1, 0x00(OUTP) - movdqu 0x10(OUTP), INC - pxor INC, STATE2 + movdqu 0x10(OUTP), IN + pxor IN, STATE2 movdqu STATE2, 0x10(OUTP) - movdqu 0x20(OUTP), INC - pxor INC, STATE3 + movdqu 0x20(OUTP), IN + pxor IN, STATE3 movdqu STATE3, 0x20(OUTP) - movdqu 0x30(OUTP), INC - pxor INC, STATE4 + movdqu 0x30(OUTP), IN + pxor IN, STATE4 movdqu STATE4, 0x30(OUTP) _aesni_gf128mul_x_ble() add $64, INP add $64, OUTP - sub $64, LEN - ja .Lxts_enc_loop4 + test LEN, LEN + jnz .Lxts_enc_loop4 +.Lxts_enc_ret_iv: movups IV, (IVP) +.Lxts_enc_ret: +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN + popl IVP +#endif FRAME_END ret + +.Lxts_enc_1x: + add $64, LEN + jz .Lxts_enc_ret_iv + sub $16, LEN + jl .Lxts_enc_cts4 + +.Lxts_enc_loop1: + movdqu (INP), STATE + pxor IV, STATE + call _aesni_enc1 + pxor IV, STATE + _aesni_gf128mul_x_ble() + + test LEN, LEN + jz .Lxts_enc_out + + add $16, INP + sub $16, LEN + jl .Lxts_enc_cts1 + + movdqu STATE, (OUTP) + add $16, OUTP + jmp .Lxts_enc_loop1 + +.Lxts_enc_out: + movdqu STATE, (OUTP) + jmp .Lxts_enc_ret_iv + +.Lxts_enc_cts4: + movdqa STATE4, STATE + sub $16, OUTP + +.Lxts_enc_cts1: +#ifndef __x86_64__ + lea .Lcts_permute_table, T1 +#else + lea .Lcts_permute_table(%rip), T1 +#endif + add LEN, INP /* rewind input pointer */ + add $16, LEN /* # bytes in final block */ + movups (INP), IN1 + + mov T1, IVP + add $32, IVP + add LEN, T1 + sub LEN, IVP + add OUTP, LEN + + movups (T1), %xmm4 + movaps STATE, IN2 + pshufb %xmm4, STATE + movups STATE, (LEN) + + movups (IVP), %xmm0 + pshufb %xmm0, IN1 + pblendvb IN2, IN1 + movaps IN1, STATE + + pxor IV, STATE + call _aesni_enc1 + pxor IV, STATE + + movups STATE, (OUTP) + jmp .Lxts_enc_ret SYM_FUNC_END(aesni_xts_encrypt) /* @@ -2914,66 +3006,158 @@ SYM_FUNC_END(aesni_xts_encrypt) */ SYM_FUNC_START(aesni_xts_decrypt) FRAME_BEGIN - +#ifndef __x86_64__ + pushl IVP + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+20)(%esp), KEYP # ctx + movl (FRAME_OFFSET+24)(%esp), OUTP # dst + movl (FRAME_OFFSET+28)(%esp), INP # src + movl (FRAME_OFFSET+32)(%esp), LEN # len + movl (FRAME_OFFSET+36)(%esp), IVP # iv movdqa .Lgf128mul_x_ble_mask, GF128MUL_MASK +#else + movdqa .Lgf128mul_x_ble_mask(%rip), GF128MUL_MASK +#endif movups (IVP), IV mov 480(KEYP), KLEN add $240, KEYP + test $15, LEN + jz .Lxts_dec_loop4 + sub $16, LEN + .Lxts_dec_loop4: + sub $64, LEN + jl .Lxts_dec_1x + movdqa IV, STATE1 - movdqu 0x00(INP), INC - pxor INC, STATE1 + movdqu 0x00(INP), IN + pxor IN, STATE1 movdqu IV, 0x00(OUTP) _aesni_gf128mul_x_ble() movdqa IV, STATE2 - movdqu 0x10(INP), INC - pxor INC, STATE2 + movdqu 0x10(INP), IN + pxor IN, STATE2 movdqu IV, 0x10(OUTP) _aesni_gf128mul_x_ble() movdqa IV, STATE3 - movdqu 0x20(INP), INC - pxor INC, STATE3 + movdqu 0x20(INP), IN + pxor IN, STATE3 movdqu IV, 0x20(OUTP) _aesni_gf128mul_x_ble() movdqa IV, STATE4 - movdqu 0x30(INP), INC - pxor INC, STATE4 + movdqu 0x30(INP), IN + pxor IN, STATE4 movdqu IV, 0x30(OUTP) call _aesni_dec4 - movdqu 0x00(OUTP), INC - pxor INC, STATE1 + movdqu 0x00(OUTP), IN + pxor IN, STATE1 movdqu STATE1, 0x00(OUTP) - movdqu 0x10(OUTP), INC - pxor INC, STATE2 + movdqu 0x10(OUTP), IN + pxor IN, STATE2 movdqu STATE2, 0x10(OUTP) - movdqu 0x20(OUTP), INC - pxor INC, STATE3 + movdqu 0x20(OUTP), IN + pxor IN, STATE3 movdqu STATE3, 0x20(OUTP) - movdqu 0x30(OUTP), INC - pxor INC, STATE4 + movdqu 0x30(OUTP), IN + pxor IN, STATE4 movdqu STATE4, 0x30(OUTP) _aesni_gf128mul_x_ble() add $64, INP add $64, OUTP - sub $64, LEN - ja .Lxts_dec_loop4 + test LEN, LEN + jnz .Lxts_dec_loop4 +.Lxts_dec_ret_iv: movups IV, (IVP) +.Lxts_dec_ret: +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN + popl IVP +#endif FRAME_END ret -SYM_FUNC_END(aesni_xts_decrypt) +.Lxts_dec_1x: + add $64, LEN + jz .Lxts_dec_ret_iv + +.Lxts_dec_loop1: + movdqu (INP), STATE + + add $16, INP + sub $16, LEN + jl .Lxts_dec_cts1 + + pxor IV, STATE + call _aesni_dec1 + pxor IV, STATE + _aesni_gf128mul_x_ble() + + test LEN, LEN + jz .Lxts_dec_out + + movdqu STATE, (OUTP) + add $16, OUTP + jmp .Lxts_dec_loop1 + +.Lxts_dec_out: + movdqu STATE, (OUTP) + jmp .Lxts_dec_ret_iv + +.Lxts_dec_cts1: + movdqa IV, STATE4 + _aesni_gf128mul_x_ble() + + pxor IV, STATE + call _aesni_dec1 + pxor IV, STATE + +#ifndef __x86_64__ + lea .Lcts_permute_table, T1 +#else + lea .Lcts_permute_table(%rip), T1 #endif + add LEN, INP /* rewind input pointer */ + add $16, LEN /* # bytes in final block */ + movups (INP), IN1 + + mov T1, IVP + add $32, IVP + add LEN, T1 + sub LEN, IVP + add OUTP, LEN + + movups (T1), %xmm4 + movaps STATE, IN2 + pshufb %xmm4, STATE + movups STATE, (LEN) + + movups (IVP), %xmm0 + pshufb %xmm0, IN1 + pblendvb IN2, IN1 + movaps IN1, STATE + + pxor STATE4, STATE + call _aesni_dec1 + pxor STATE4, STATE + + movups STATE, (OUTP) + jmp .Lxts_dec_ret +SYM_FUNC_END(aesni_xts_decrypt) diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c index 84e3ed49b35d..2116bc2b9507 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -33,9 +33,6 @@ #include <crypto/internal/skcipher.h> #include <linux/workqueue.h> #include <linux/spinlock.h> -#ifdef CONFIG_X86_64 -#include <asm/crypto/glue_helper.h> -#endif #define AESNI_ALIGN 16 @@ -632,98 +629,6 @@ static int ctr_crypt(struct skcipher_request *req) return err; } -static int xts_aesni_setkey(struct crypto_skcipher *tfm, const u8 *key, - unsigned int keylen) -{ - struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm); - int err; - - err = xts_verify_key(tfm, key, keylen); - if (err) - return err; - - keylen /= 2; - - /* first half of xts-key is for crypt */ - err = aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_crypt_ctx, - key, keylen); - if (err) - return err; - - /* second half of xts-key is for tweak */ - return aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_tweak_ctx, - key + keylen, keylen); -} - - -static void aesni_xts_enc(const void *ctx, u8 *dst, const u8 *src, le128 *iv) -{ - glue_xts_crypt_128bit_one(ctx, dst, src, iv, aesni_enc); -} - -static void aesni_xts_dec(const void *ctx, u8 *dst, const u8 *src, le128 *iv) -{ - glue_xts_crypt_128bit_one(ctx, dst, src, iv, aesni_dec); -} - -static void aesni_xts_enc32(const void *ctx, u8 *dst, const u8 *src, le128 *iv) -{ - aesni_xts_encrypt(ctx, dst, src, 32 * AES_BLOCK_SIZE, (u8 *)iv); -} - -static void aesni_xts_dec32(const void *ctx, u8 *dst, const u8 *src, le128 *iv) -{ - aesni_xts_decrypt(ctx, dst, src, 32 * AES_BLOCK_SIZE, (u8 *)iv); -} - -static const struct common_glue_ctx aesni_enc_xts = { - .num_funcs = 2, - .fpu_blocks_limit = 1, - - .funcs = { { - .num_blocks = 32, - .fn_u = { .xts = aesni_xts_enc32 } - }, { - .num_blocks = 1, - .fn_u = { .xts = aesni_xts_enc } - } } -}; - -static const struct common_glue_ctx aesni_dec_xts = { - .num_funcs = 2, - .fpu_blocks_limit = 1, - - .funcs = { { - .num_blocks = 32, - .fn_u = { .xts = aesni_xts_dec32 } - }, { - .num_blocks = 1, - .fn_u = { .xts = aesni_xts_dec } - } } -}; - -static int xts_encrypt(struct skcipher_request *req) -{ - struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm); - - return glue_xts_req_128bit(&aesni_enc_xts, req, aesni_enc, - aes_ctx(ctx->raw_tweak_ctx), - aes_ctx(ctx->raw_crypt_ctx), - false); -} - -static int xts_decrypt(struct skcipher_request *req) -{ - struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm); - - return glue_xts_req_128bit(&aesni_dec_xts, req, aesni_enc, - aes_ctx(ctx->raw_tweak_ctx), - aes_ctx(ctx->raw_crypt_ctx), - true); -} - static int rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len) { @@ -996,6 +901,128 @@ static int helper_rfc4106_decrypt(struct aead_request *req) } #endif +static int xts_aesni_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keylen) +{ + struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm); + int err; + + err = xts_verify_key(tfm, key, keylen); + if (err) + return err; + + keylen /= 2; + + /* first half of xts-key is for crypt */ + err = aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_crypt_ctx, + key, keylen); + if (err) + return err; + + /* second half of xts-key is for tweak */ + return aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_tweak_ctx, + key + keylen, keylen); +} + +static int xts_crypt(struct skcipher_request *req, bool encrypt) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm); + int tail = req->cryptlen % AES_BLOCK_SIZE; + struct skcipher_request subreq; + struct skcipher_walk walk; + int err; + + if (req->cryptlen < AES_BLOCK_SIZE) + return -EINVAL; + + err = skcipher_walk_virt(&walk, req, false); + + if (unlikely(tail > 0 && walk.nbytes < walk.total)) { + int blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2; + + skcipher_walk_abort(&walk); + + skcipher_request_set_tfm(&subreq, tfm); + skcipher_request_set_callback(&subreq, + skcipher_request_flags(req), + NULL, NULL); + skcipher_request_set_crypt(&subreq, req->src, req->dst, + blocks * AES_BLOCK_SIZE, req->iv); + req = &subreq; + err = skcipher_walk_virt(&walk, req, false); + } else { + tail = 0; + } + + kernel_fpu_begin(); + + /* calculate first value of T */ + aesni_enc(aes_ctx(ctx->raw_tweak_ctx), walk.iv, walk.iv); + + while (walk.nbytes > 0) { + int nbytes = walk.nbytes; + + if (nbytes < walk.total) + nbytes &= ~(AES_BLOCK_SIZE - 1); + + if (encrypt) + aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx), + walk.dst.virt.addr, walk.src.virt.addr, + nbytes, walk.iv); + else + aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx), + walk.dst.virt.addr, walk.src.virt.addr, + nbytes, walk.iv); + kernel_fpu_end(); + + err = skcipher_walk_done(&walk, walk.nbytes - nbytes); + + if (walk.nbytes > 0) + kernel_fpu_begin(); + } + + if (unlikely(tail > 0 && !err)) { + struct scatterlist sg_src[2], sg_dst[2]; + struct scatterlist *src, *dst; + + dst = src = scatterwalk_ffwd(sg_src, req->src, req->cryptlen); + if (req->dst != req->src) + dst = scatterwalk_ffwd(sg_dst, req->dst, req->cryptlen); + + skcipher_request_set_crypt(req, src, dst, AES_BLOCK_SIZE + tail, + req->iv); + + err = skcipher_walk_virt(&walk, &subreq, false); + if (err) + return err; + + kernel_fpu_begin(); + if (encrypt) + aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx), + walk.dst.virt.addr, walk.src.virt.addr, + walk.nbytes, walk.iv); + else + aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx), + walk.dst.virt.addr, walk.src.virt.addr, + walk.nbytes, walk.iv); + kernel_fpu_end(); + + err = skcipher_walk_done(&walk, 0); + } + return err; +} + +static int xts_encrypt(struct skcipher_request *req) +{ + return xts_crypt(req, true); +} + +static int xts_decrypt(struct skcipher_request *req) +{ + return xts_crypt(req, false); +} + static struct crypto_alg aesni_cipher_alg = { .cra_name = "aes", .cra_driver_name = "aes-aesni", @@ -1082,6 +1109,7 @@ static struct skcipher_alg aesni_skciphers[] = { .setkey = aesni_skcipher_setkey, .encrypt = ctr_crypt, .decrypt = ctr_crypt, +#endif }, { .base = { .cra_name = "__xts(aes)", @@ -1095,10 +1123,10 @@ static struct skcipher_alg aesni_skciphers[] = { .min_keysize = 2 * AES_MIN_KEY_SIZE, .max_keysize = 2 * AES_MAX_KEY_SIZE, .ivsize = AES_BLOCK_SIZE, + .walksize = 2 * AES_BLOCK_SIZE, .setkey = xts_aesni_setkey, .encrypt = xts_encrypt, .decrypt = xts_decrypt, -#endif } }; diff --git a/crypto/Kconfig b/crypto/Kconfig index a367fcfeb5d4..c48ca26e2169 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1133,7 +1133,6 @@ config CRYPTO_AES_NI_INTEL select CRYPTO_LIB_AES select CRYPTO_ALGAPI select CRYPTO_SKCIPHER - select CRYPTO_GLUE_HELPER_X86 if 64BIT select CRYPTO_SIMD help Use Intel AES-NI instructions for AES algorithm. |