mirror of
https://github.com/switchbrew/libnx.git
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crypto: add aes-ecb block enc/dec
This commit is contained in:
Michael Scire
fincs
parent
4f0aa0a589
commit
f8375c46c0
@ -24,14 +24,14 @@ VERSION := $(LIBNX_MAJOR).$(LIBNX_MINOR).$(LIBNX_PATCH)
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#---------------------------------------------------------------------------------
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TARGET := nx
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#BUILD := build
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SOURCES := source/arm source/kernel source/services source/nvidia source/nvidia/ioctl source/display source/audio source/applets source/runtime source/runtime/devices source/runtime/util/utf
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SOURCES := source/arm source/kernel source/services source/crypto source/nvidia source/nvidia/ioctl source/display source/audio source/applets source/runtime source/runtime/devices source/runtime/util/utf
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DATA := data
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INCLUDES := include external/bsd/include
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#---------------------------------------------------------------------------------
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# options for code generation
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#---------------------------------------------------------------------------------
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ARCH := -march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIC -ftls-model=local-exec
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ARCH := -march=armv8-a+crypto -mtune=cortex-a57 -mtp=soft -fPIC -ftls-model=local-exec
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CFLAGS := -g -Wall -Werror \
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-ffunction-sections \
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@ -124,6 +124,8 @@ extern "C" {
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#include "switch/runtime/devices/romfs_dev.h"
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#include "switch/runtime/devices/socket.h"
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#include "switch/crypto.h"
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#ifdef __cplusplus
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}
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#endif
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9
nx/include/switch/crypto.h
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9
nx/include/switch/crypto.h
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@ -0,0 +1,9 @@
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/**
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* @file crypto.h
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* @brief Switch (accelerated) crypto includes.
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* @copyright libnx Authors
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*/
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#pragma once
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#include "types.h"
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#include "crypto/aes.h"
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54
nx/include/switch/crypto/aes.h
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54
nx/include/switch/crypto/aes.h
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@ -0,0 +1,54 @@
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/**
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* @file aes.h
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* @brief Switch accelerated AES implementation.
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* @copyright libnx Authors
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*/
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#pragma once
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#include "../types.h"
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#define AES_BLOCK_SIZE 0x10
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#define AES_128_KEY_SIZE 0x10
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#define AES_128_U32_PER_KEY (AES_128_KEY_SIZE / sizeof(u32))
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#define AES_128_NUM_ROUNDS 10
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#define AES_192_KEY_SIZE 0x18
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#define AES_192_U32_PER_KEY (AES_192_KEY_SIZE / sizeof(u32))
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#define AES_192_NUM_ROUNDS 12
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#define AES_256_KEY_SIZE 0x20
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#define AES_256_U32_PER_KEY (AES_256_KEY_SIZE / sizeof(u32))
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#define AES_256_NUM_ROUNDS 14
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/// Context for AES-128 operations.
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typedef struct {
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u8 round_keys[AES_128_NUM_ROUNDS+1][AES_BLOCK_SIZE];
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} Aes128Context;
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/// Context for AES-192 operations.
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typedef struct {
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u8 round_keys[AES_192_NUM_ROUNDS+1][AES_BLOCK_SIZE];
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} Aes192Context;
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/// Context for AES-192 operations.
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typedef struct {
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u8 round_keys[AES_256_NUM_ROUNDS+1][AES_BLOCK_SIZE];
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} Aes256Context;
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/// Initialize a 128-bit AES context.
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void aes128ContextCreate(Aes128Context *out, const void *key, bool is_encryptor);
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/// Encrypt using an AES context (Requires is_encryptor when initializing)
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void aes128EncryptBlock(const Aes128Context *ctx, void *dst, const void *src);
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/// Decrypt using an AES context (Requires !is_encryptor when initializing)
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void aes128DecryptBlock(const Aes128Context *ctx, void *dst, const void *src);
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/// Initialize a 192-bit AES context.
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void aes192ContextCreate(Aes192Context *out, const void *key, bool is_encryptor);
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/// Encrypt using an AES context (Requires is_encryptor when initializing)
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void aes192EncryptBlock(const Aes192Context *ctx, void *dst, const void *src);
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/// Decrypt using an AES context (Requires !is_encryptor when initializing)
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void aes192DecryptBlock(const Aes192Context *ctx, void *dst, const void *src);
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/// Initialize a 256-bit AES context.
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void aes256ContextCreate(Aes256Context *out, const void *key, bool is_encryptor);
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/// Encrypt using an AES context (Requires is_encryptor when initializing)
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void aes256EncryptBlock(const Aes256Context *ctx, void *dst, const void *src);
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/// Decrypt using an AES context (Requires !is_encryptor when initializing)
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void aes256DecryptBlock(const Aes256Context *ctx, void *dst, const void *src);
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405
nx/source/crypto/aes.c
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405
nx/source/crypto/aes.c
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@ -0,0 +1,405 @@
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#include <string.h>
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#include <stdlib.h>
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#include <arm_neon.h>
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#include "result.h"
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#include "crypto/aes.h"
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/* Helper macros to setup for inline AES asm */
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#define AES_ENC_DEC_SETUP_VARS() \
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uint8x16_t tmp = vld1q_u8((const uint8_t *)src); \
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uint8x16_t tmp2
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#define AES_ENC_DEC_OUTPUT_VARS() \
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[tmp]"+w"(tmp), [tmp2]"=w"(tmp2)
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#define AES_ENC_DEC_STORE_RESULT() \
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vst1q_u8((uint8_t *)dst, tmp)
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/* Helper macros to do AES encryption, via inline asm. */
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#define AES_ENC_ROUND(n) \
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"ldr %q[tmp2], %[round_key_" #n "]\n" \
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"aese %[tmp].16b, %[tmp2].16b\n" \
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"aesmc %[tmp].16b, %[tmp].16b\n"
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#define AES_ENC_FINAL_ROUND() \
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"ldr %q[tmp2], %[round_key_second_last]\n" \
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"aese %[tmp].16b, %[tmp2].16b\n" \
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"ldr %q[tmp2], %[round_key_last]\n" \
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"eor %[tmp].16b, %[tmp].16b, %[tmp2].16b"
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#define AES_ENC_INPUT_ROUND_KEY(num_rounds, n) \
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[round_key_##n]"m"(ctx->round_keys[(n-1)])
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#define AES_ENC_INPUT_LAST_ROUND_KEYS(num_rounds) \
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[round_key_second_last]"m"(ctx->round_keys[(num_rounds - 1)]), \
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[round_key_last]"m"(ctx->round_keys[(num_rounds)])
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/* Helper macros to do AES decryption, via inline asm. */
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#define AES_DEC_ROUND(n) \
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"ldr %q[tmp2], %[round_key_" #n "]\n" \
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"aesd %[tmp].16b, %[tmp2].16b\n" \
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"aesimc %[tmp].16b, %[tmp].16b\n"
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#define AES_DEC_FINAL_ROUND() \
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"ldr %q[tmp2], %[round_key_second_last]\n" \
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"aesd %[tmp].16b, %[tmp2].16b\n" \
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"ldr %q[tmp2], %[round_key_last]\n" \
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"eor %[tmp].16b, %[tmp].16b, %[tmp2].16b"
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#define AES_DEC_INPUT_ROUND_KEY(num_rounds, n) \
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[round_key_##n]"m"(ctx->round_keys[(num_rounds + 1 - n)])
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#define AES_DEC_INPUT_LAST_ROUND_KEYS(num_rounds) \
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[round_key_second_last]"m"(ctx->round_keys[1]), \
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[round_key_last]"m"(ctx->round_keys[0])
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/* Lookup tables for key scheduling. */
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static const u8 s_subBytesTable[0x100] = {
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0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
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0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
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0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
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0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
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0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
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0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
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0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
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0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
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0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
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0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
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0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
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0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
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0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
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0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
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0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
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0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
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};
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static const u8 s_rconTable[16] = {
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0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f
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};
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static inline u32 _subBytes(u32 tmp) {
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return (s_subBytesTable[(tmp >> 0x00) & 0xFF] << 0x00) |
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(s_subBytesTable[(tmp >> 0x08) & 0xFF] << 0x08) |
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(s_subBytesTable[(tmp >> 0x10) & 0xFF] << 0x10) |
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(s_subBytesTable[(tmp >> 0x18) & 0xFF] << 0x18);
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}
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static inline u32 _rotateBytes(u32 tmp) {
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return (((tmp >> 0x00) & 0xFF) << 0x18) |
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(((tmp >> 0x08) & 0xFF) << 0x00) |
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(((tmp >> 0x10) & 0xFF) << 0x08) |
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(((tmp >> 0x18) & 0xFF) << 0x10);
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}
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void aes128ContextCreate(Aes128Context *out, const void *key, bool is_encryptor) {
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u32 *round_keys_u32 = (u32 *)out->round_keys;
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/* Copy in first round key. */
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memcpy(round_keys_u32, key, AES_128_KEY_SIZE);
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u32 tmp = round_keys_u32[AES_128_U32_PER_KEY - 1];
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/* Do AES key scheduling. */
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for (size_t i = AES_128_U32_PER_KEY; i < sizeof(out->round_keys) / sizeof(u32); i++) {
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/* First word of key needs special handling. */
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if (i % AES_128_U32_PER_KEY == 0) {
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tmp = _rotateBytes(_subBytes(tmp)) ^ (u32)s_rconTable[(i / AES_128_U32_PER_KEY) - 1];
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}
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tmp ^= round_keys_u32[i - AES_128_U32_PER_KEY];
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round_keys_u32[i] = tmp;
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}
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/* If decryption, calculate inverse mix columns on round keys ahead of time to speed up decryption. */
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if (!is_encryptor) {
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for (size_t i = 1; i < AES_128_NUM_ROUNDS; i++) {
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uint8x16_t tmp_key = vld1q_u8(out->round_keys[i]);
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tmp_key = vaesimcq_u8(tmp_key);
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vst1q_u8(out->round_keys[i], tmp_key);
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}
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}
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}
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void aes192ContextCreate(Aes192Context *out, const void *key, bool is_encryptor) {
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u32 *round_keys_u32 = (u32 *)out->round_keys;
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/* Copy in first round key. */
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memcpy(round_keys_u32, key, AES_192_KEY_SIZE);
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u32 tmp = round_keys_u32[AES_192_U32_PER_KEY - 1];
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/* Do AES key scheduling. */
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for (size_t i = AES_192_U32_PER_KEY; i < sizeof(out->round_keys) / sizeof(u32); i++) {
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/* First word of key needs special handling. */
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if (i % AES_192_U32_PER_KEY == 0) {
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tmp = _rotateBytes(_subBytes(tmp)) ^ (u32)s_rconTable[(i / AES_192_U32_PER_KEY) - 1];
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}
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tmp ^= round_keys_u32[i - AES_192_U32_PER_KEY];
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round_keys_u32[i] = tmp;
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}
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/* If decryption, calculate inverse mix columns on round keys ahead of time to speed up decryption. */
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if (!is_encryptor) {
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for (size_t i = 1; i < AES_192_NUM_ROUNDS; i++) {
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uint8x16_t tmp_key = vld1q_u8(out->round_keys[i]);
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tmp_key = vaesimcq_u8(tmp_key);
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vst1q_u8(out->round_keys[i], tmp_key);
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}
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}
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}
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void aes256ContextCreate(Aes256Context *out, const void *key, bool is_encryptor) {
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u32 *round_keys_u32 = (u32 *)out->round_keys;
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/* Copy in first round key. */
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memcpy(round_keys_u32, key, AES_256_KEY_SIZE);
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u32 tmp = round_keys_u32[AES_256_U32_PER_KEY - 1];
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/* Do AES key scheduling. */
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for (size_t i = AES_256_U32_PER_KEY; i < sizeof(out->round_keys) / sizeof(u32); i++) {
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/* First word of key needs special handling. */
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if (i % AES_256_U32_PER_KEY == 0) {
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tmp = _rotateBytes(_subBytes(tmp)) ^ (u32)s_rconTable[(i / AES_256_U32_PER_KEY) - 1];
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} else if (i % AES_256_U32_PER_KEY == (AES_256_U32_PER_KEY / 2)) {
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/* AES-256 does sub bytes on first word of second key */
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tmp = _subBytes(tmp);
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}
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tmp ^= round_keys_u32[i - AES_256_U32_PER_KEY];
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round_keys_u32[i] = tmp;
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}
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/* If decryption, calculate inverse mix columns on round keys ahead of time to speed up decryption. */
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if (!is_encryptor) {
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for (size_t i = 1; i < AES_256_NUM_ROUNDS; i++) {
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uint8x16_t tmp_key = vld1q_u8(out->round_keys[i]);
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tmp_key = vaesimcq_u8(tmp_key);
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vst1q_u8(out->round_keys[i], tmp_key);
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}
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}
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}
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void aes128EncryptBlock(const Aes128Context *ctx, void *dst, const void *src) {
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/* Setup for asm */
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AES_ENC_DEC_SETUP_VARS();
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/* Use optimized assembly to do all rounds. */
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__asm__ __volatile__ (
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AES_ENC_ROUND(1)
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AES_ENC_ROUND(2)
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AES_ENC_ROUND(3)
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AES_ENC_ROUND(4)
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AES_ENC_ROUND(5)
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AES_ENC_ROUND(6)
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AES_ENC_ROUND(7)
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AES_ENC_ROUND(8)
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AES_ENC_ROUND(9)
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AES_ENC_FINAL_ROUND()
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: AES_ENC_DEC_OUTPUT_VARS()
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: AES_ENC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 1),
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AES_ENC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 2),
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AES_ENC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 3),
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AES_ENC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 4),
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AES_ENC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 5),
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AES_ENC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 6),
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AES_ENC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 7),
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AES_ENC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 8),
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AES_ENC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 9),
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AES_ENC_INPUT_LAST_ROUND_KEYS(AES_128_NUM_ROUNDS)
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);
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/* Store result. */
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AES_ENC_DEC_STORE_RESULT();
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}
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void aes192EncryptBlock(const Aes192Context *ctx, void *dst, const void *src) {
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/* Setup for asm */
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AES_ENC_DEC_SETUP_VARS();
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/* Use optimized assembly to do all rounds. */
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__asm__ __volatile__ (
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AES_ENC_ROUND(1)
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AES_ENC_ROUND(2)
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AES_ENC_ROUND(3)
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AES_ENC_ROUND(4)
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AES_ENC_ROUND(5)
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AES_ENC_ROUND(6)
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AES_ENC_ROUND(7)
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AES_ENC_ROUND(8)
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AES_ENC_ROUND(9)
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AES_ENC_ROUND(10)
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AES_ENC_ROUND(11)
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AES_ENC_FINAL_ROUND()
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: AES_ENC_DEC_OUTPUT_VARS()
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: AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 1),
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AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 2),
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AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 3),
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AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 4),
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AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 5),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 6),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 7),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 8),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 9),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 10),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 11),
|
||||
AES_ENC_INPUT_LAST_ROUND_KEYS(AES_192_NUM_ROUNDS)
|
||||
);
|
||||
|
||||
/* Store result. */
|
||||
AES_ENC_DEC_STORE_RESULT();
|
||||
}
|
||||
|
||||
void aes256EncryptBlock(const Aes256Context *ctx, void *dst, const void *src) {
|
||||
/* Setup for asm */
|
||||
AES_ENC_DEC_SETUP_VARS();
|
||||
|
||||
/* Use optimized assembly to do all rounds. */
|
||||
__asm__ __volatile__ (
|
||||
AES_ENC_ROUND(1)
|
||||
AES_ENC_ROUND(2)
|
||||
AES_ENC_ROUND(3)
|
||||
AES_ENC_ROUND(4)
|
||||
AES_ENC_ROUND(5)
|
||||
AES_ENC_ROUND(6)
|
||||
AES_ENC_ROUND(7)
|
||||
AES_ENC_ROUND(8)
|
||||
AES_ENC_ROUND(9)
|
||||
AES_ENC_ROUND(10)
|
||||
AES_ENC_ROUND(11)
|
||||
AES_ENC_ROUND(12)
|
||||
AES_ENC_ROUND(13)
|
||||
AES_ENC_FINAL_ROUND()
|
||||
: AES_ENC_DEC_OUTPUT_VARS()
|
||||
: AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 1),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 2),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 3),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 4),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 5),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 6),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 7),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 8),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 9),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 10),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 11),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 12),
|
||||
AES_ENC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 13),
|
||||
AES_ENC_INPUT_LAST_ROUND_KEYS(AES_256_NUM_ROUNDS)
|
||||
);
|
||||
|
||||
/* Store result. */
|
||||
AES_ENC_DEC_STORE_RESULT();
|
||||
}
|
||||
|
||||
void aes128DecryptBlock(const Aes128Context *ctx, void *dst, const void *src) {
|
||||
/* Setup for asm */
|
||||
AES_ENC_DEC_SETUP_VARS();
|
||||
|
||||
/* Use optimized assembly to do all rounds. */
|
||||
__asm__ __volatile__ (
|
||||
AES_DEC_ROUND(1)
|
||||
AES_DEC_ROUND(2)
|
||||
AES_DEC_ROUND(3)
|
||||
AES_DEC_ROUND(4)
|
||||
AES_DEC_ROUND(5)
|
||||
AES_DEC_ROUND(6)
|
||||
AES_DEC_ROUND(7)
|
||||
AES_DEC_ROUND(8)
|
||||
AES_DEC_ROUND(9)
|
||||
AES_DEC_FINAL_ROUND()
|
||||
: AES_ENC_DEC_OUTPUT_VARS()
|
||||
: AES_DEC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 1),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 2),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 3),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 4),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 5),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 6),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 7),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 8),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_128_NUM_ROUNDS, 9),
|
||||
AES_DEC_INPUT_LAST_ROUND_KEYS(AES_128_NUM_ROUNDS)
|
||||
);
|
||||
|
||||
/* Store result. */
|
||||
AES_ENC_DEC_STORE_RESULT();
|
||||
}
|
||||
|
||||
void aes192DecryptBlock(const Aes192Context *ctx, void *dst, const void *src) {
|
||||
/* Setup for asm */
|
||||
AES_ENC_DEC_SETUP_VARS();
|
||||
|
||||
/* Use optimized assembly to do all rounds. */
|
||||
__asm__ __volatile__ (
|
||||
AES_DEC_ROUND(1)
|
||||
AES_DEC_ROUND(2)
|
||||
AES_DEC_ROUND(3)
|
||||
AES_DEC_ROUND(4)
|
||||
AES_DEC_ROUND(5)
|
||||
AES_DEC_ROUND(6)
|
||||
AES_DEC_ROUND(7)
|
||||
AES_DEC_ROUND(8)
|
||||
AES_DEC_ROUND(9)
|
||||
AES_DEC_ROUND(10)
|
||||
AES_DEC_ROUND(11)
|
||||
AES_DEC_FINAL_ROUND()
|
||||
: AES_ENC_DEC_OUTPUT_VARS()
|
||||
: AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 1),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 2),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 3),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 4),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 5),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 6),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 7),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 8),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 9),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 10),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_192_NUM_ROUNDS, 11),
|
||||
AES_DEC_INPUT_LAST_ROUND_KEYS(AES_192_NUM_ROUNDS)
|
||||
);
|
||||
|
||||
/* Store result. */
|
||||
AES_ENC_DEC_STORE_RESULT();
|
||||
}
|
||||
|
||||
void aes256DecryptBlock(const Aes256Context *ctx, void *dst, const void *src) {
|
||||
/* Setup for asm */
|
||||
AES_ENC_DEC_SETUP_VARS();
|
||||
|
||||
/* Use optimized assembly to do all rounds. */
|
||||
__asm__ __volatile__ (
|
||||
AES_DEC_ROUND(1)
|
||||
AES_DEC_ROUND(2)
|
||||
AES_DEC_ROUND(3)
|
||||
AES_DEC_ROUND(4)
|
||||
AES_DEC_ROUND(5)
|
||||
AES_DEC_ROUND(6)
|
||||
AES_DEC_ROUND(7)
|
||||
AES_DEC_ROUND(8)
|
||||
AES_DEC_ROUND(9)
|
||||
AES_DEC_ROUND(10)
|
||||
AES_DEC_ROUND(11)
|
||||
AES_DEC_ROUND(12)
|
||||
AES_DEC_ROUND(13)
|
||||
AES_DEC_FINAL_ROUND()
|
||||
: AES_ENC_DEC_OUTPUT_VARS()
|
||||
: AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 1),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 2),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 3),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 4),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 5),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 6),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 7),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 8),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 9),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 10),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 11),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 12),
|
||||
AES_DEC_INPUT_ROUND_KEY(AES_256_NUM_ROUNDS, 13),
|
||||
AES_DEC_INPUT_LAST_ROUND_KEYS(AES_256_NUM_ROUNDS)
|
||||
);
|
||||
|
||||
/* Store result. */
|
||||
AES_ENC_DEC_STORE_RESULT();
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user