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-rw-r--r--arch/x86/crypto/aesni-intel_asm.S280
-rw-r--r--arch/x86/crypto/aesni-intel_glue.c220
-rw-r--r--crypto/Kconfig1
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.
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-25 17:43:35 +0100