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aes_custom.h
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aes_custom.h
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#pragma once
#include "riscv.h"
#define aes_enc_round(rs1, rs2, sel) opcode_R(CUSTOM0, 0x00, (sel << 3), rs1, rs2)
#define aes_enc_round_last(rs1, rs2, sel) opcode_R(CUSTOM0, 0x00, (sel << 3) | 2, rs1, rs2)
#define aes_dec_round(rs1, rs2, sel) opcode_R(CUSTOM0, 0x00, (sel << 3) | 1, rs1, rs2)
#define aes_dec_round_last(rs1, rs2, sel) opcode_R(CUSTOM0, 0x00, (sel << 3) | 2 | 1, rs1, rs2)
static inline __attribute__((always_inline)) unsigned int vexriscv_aes_load_unaligned(const unsigned char *ptr) {
return ((unsigned int)ptr[0] << 0) | ((unsigned int)ptr[1] << 8) | ((unsigned int)ptr[2] << 16) | ((unsigned int)ptr[3] << 24);
}
static inline __attribute__((always_inline)) void vexriscv_aes_store_unaligned(unsigned char *ptr, unsigned int value) {
ptr[0] = value >> 0;
ptr[1] = value >> 8;
ptr[2] = value >> 16;
ptr[3] = value >> 24;
}
static inline __attribute__((always_inline)) void vexriscv_aes_encrypt(unsigned char *in,
unsigned char *out,
unsigned int *rk,
int round_count) {
unsigned int s0, s1, s2, s3, t0, t1, t2, t3;
round_count >>= 1;
if(((int)in & 3) == 0){
s0 = ((volatile unsigned int*)in)[0];
s1 = ((volatile unsigned int*)in)[1];
s2 = ((volatile unsigned int*)in)[2];
s3 = ((volatile unsigned int*)in)[3];
} else {
s0 = vexriscv_aes_load_unaligned(in + 0);
s1 = vexriscv_aes_load_unaligned(in + 4);
s2 = vexriscv_aes_load_unaligned(in + 8);
s3 = vexriscv_aes_load_unaligned(in + 12);
}
t0 = ((volatile unsigned int*)rk)[0];
t1 = ((volatile unsigned int*)rk)[1];
t2 = ((volatile unsigned int*)rk)[2];
t3 = ((volatile unsigned int*)rk)[3];
s0 ^= t0;
s1 ^= t1;
s2 ^= t2;
s3 ^= t3;
for (;;) {
t0 = ((volatile unsigned int*)rk)[4];
t1 = ((volatile unsigned int*)rk)[5];
t2 = ((volatile unsigned int*)rk)[6];
t3 = ((volatile unsigned int*)rk)[7];
t0 = aes_enc_round(t0, s0, 0);
t1 = aes_enc_round(t1, s1, 0);
t2 = aes_enc_round(t2, s2, 0);
t3 = aes_enc_round(t3, s3, 0);
t0 = aes_enc_round(t0, s1, 1);
t1 = aes_enc_round(t1, s2, 1);
t2 = aes_enc_round(t2, s3, 1);
t3 = aes_enc_round(t3, s0, 1);
t0 = aes_enc_round(t0, s2, 2);
t1 = aes_enc_round(t1, s3, 2);
t2 = aes_enc_round(t2, s0, 2);
t3 = aes_enc_round(t3, s1, 2);
t0 = aes_enc_round(t0, s3, 3);
t1 = aes_enc_round(t1, s0, 3);
t2 = aes_enc_round(t2, s1, 3);
t3 = aes_enc_round(t3, s2, 3);
rk += 8;
if (--round_count == 0) {
break;
}
s0 = ((volatile unsigned int*)rk)[0];
s1 = ((volatile unsigned int*)rk)[1];
s2 = ((volatile unsigned int*)rk)[2];
s3 = ((volatile unsigned int*)rk)[3];
s0 = aes_enc_round(s0, t0, 0);
s1 = aes_enc_round(s1, t1, 0);
s2 = aes_enc_round(s2, t2, 0);
s3 = aes_enc_round(s3, t3, 0);
s0 = aes_enc_round(s0, t1, 1);
s1 = aes_enc_round(s1, t2, 1);
s2 = aes_enc_round(s2, t3, 1);
s3 = aes_enc_round(s3, t0, 1);
s0 = aes_enc_round(s0, t2, 2);
s1 = aes_enc_round(s1, t3, 2);
s2 = aes_enc_round(s2, t0, 2);
s3 = aes_enc_round(s3, t1, 2);
s0 = aes_enc_round(s0, t3, 3);
s1 = aes_enc_round(s1, t0, 3);
s2 = aes_enc_round(s2, t1, 3);
s3 = aes_enc_round(s3, t2, 3);
}
s0 = ((volatile unsigned int*)rk)[0];
s1 = ((volatile unsigned int*)rk)[1];
s2 = ((volatile unsigned int*)rk)[2];
s3 = ((volatile unsigned int*)rk)[3];
s0 = aes_enc_round_last(s0, t0, 0);
s1 = aes_enc_round_last(s1, t1, 0);
s2 = aes_enc_round_last(s2, t2, 0);
s3 = aes_enc_round_last(s3, t3, 0);
s0 = aes_enc_round_last(s0, t1, 1);
s1 = aes_enc_round_last(s1, t2, 1);
s2 = aes_enc_round_last(s2, t3, 1);
s3 = aes_enc_round_last(s3, t0, 1);
s0 = aes_enc_round_last(s0, t2, 2);
s1 = aes_enc_round_last(s1, t3, 2);
s2 = aes_enc_round_last(s2, t0, 2);
s3 = aes_enc_round_last(s3, t1, 2);
s0 = aes_enc_round_last(s0, t3, 3);
s1 = aes_enc_round_last(s1, t0, 3);
s2 = aes_enc_round_last(s2, t1, 3);
s3 = aes_enc_round_last(s3, t2, 3);
if(((int)out & 3) == 0){
((volatile unsigned int*)out)[0] = s0;
((volatile unsigned int*)out)[1] = s1;
((volatile unsigned int*)out)[2] = s2;
((volatile unsigned int*)out)[3] = s3;
} else {
vexriscv_aes_store_unaligned(out + 0, s0);
vexriscv_aes_store_unaligned(out + 4, s1);
vexriscv_aes_store_unaligned(out + 8, s2);
vexriscv_aes_store_unaligned(out + 12, s3);
}
}
static inline __attribute__((always_inline)) void vexriscv_aes_decrypt(unsigned char *in,
unsigned char *out,
unsigned int *rk,
int round_count) {
unsigned int s0, s1, s2, s3, t0, t1, t2, t3;
round_count >>= 1;
if(((int)in & 3) == 0){
s0 = ((volatile unsigned int*)in)[0];
s1 = ((volatile unsigned int*)in)[1];
s2 = ((volatile unsigned int*)in)[2];
s3 = ((volatile unsigned int*)in)[3];
} else {
s0 = vexriscv_aes_load_unaligned(in + 0);
s1 = vexriscv_aes_load_unaligned(in + 4);
s2 = vexriscv_aes_load_unaligned(in + 8);
s3 = vexriscv_aes_load_unaligned(in + 12);
}
t0 = ((volatile unsigned int*)rk)[0];
t1 = ((volatile unsigned int*)rk)[1];
t2 = ((volatile unsigned int*)rk)[2];
t3 = ((volatile unsigned int*)rk)[3];
s0 ^= t0;
s1 ^= t1;
s2 ^= t2;
s3 ^= t3;
for (;;) {
t0 = ((volatile unsigned int*)rk)[4];
t1 = ((volatile unsigned int*)rk)[5];
t2 = ((volatile unsigned int*)rk)[6];
t3 = ((volatile unsigned int*)rk)[7];
t0 = aes_dec_round(t0, s0, 0);
t1 = aes_dec_round(t1, s1, 0);
t2 = aes_dec_round(t2, s2, 0);
t3 = aes_dec_round(t3, s3, 0);
t0 = aes_dec_round(t0, s3, 1);
t1 = aes_dec_round(t1, s0, 1);
t2 = aes_dec_round(t2, s1, 1);
t3 = aes_dec_round(t3, s2, 1);
t0 = aes_dec_round(t0, s2, 2);
t1 = aes_dec_round(t1, s3, 2);
t2 = aes_dec_round(t2, s0, 2);
t3 = aes_dec_round(t3, s1, 2);
t0 = aes_dec_round(t0, s1, 3);
t1 = aes_dec_round(t1, s2, 3);
t2 = aes_dec_round(t2, s3, 3);
t3 = aes_dec_round(t3, s0, 3);
rk += 8;
if (--round_count == 0) {
break;
}
s0 = ((volatile unsigned int*)rk)[0];
s1 = ((volatile unsigned int*)rk)[1];
s2 = ((volatile unsigned int*)rk)[2];
s3 = ((volatile unsigned int*)rk)[3];
s0 = aes_dec_round(s0, t0, 0);
s1 = aes_dec_round(s1, t1, 0);
s2 = aes_dec_round(s2, t2, 0);
s3 = aes_dec_round(s3, t3, 0);
s0 = aes_dec_round(s0, t3, 1);
s1 = aes_dec_round(s1, t0, 1);
s2 = aes_dec_round(s2, t1, 1);
s3 = aes_dec_round(s3, t2, 1);
s0 = aes_dec_round(s0, t2, 2);
s1 = aes_dec_round(s1, t3, 2);
s2 = aes_dec_round(s2, t0, 2);
s3 = aes_dec_round(s3, t1, 2);
s0 = aes_dec_round(s0, t1, 3);
s1 = aes_dec_round(s1, t2, 3);
s2 = aes_dec_round(s2, t3, 3);
s3 = aes_dec_round(s3, t0, 3);
}
s0 = ((volatile unsigned int*)rk)[0];
s1 = ((volatile unsigned int*)rk)[1];
s2 = ((volatile unsigned int*)rk)[2];
s3 = ((volatile unsigned int*)rk)[3];
s0 = aes_dec_round_last(s0, t0, 0);
s1 = aes_dec_round_last(s1, t1, 0);
s2 = aes_dec_round_last(s2, t2, 0);
s3 = aes_dec_round_last(s3, t3, 0);
s0 = aes_dec_round_last(s0, t3, 1);
s1 = aes_dec_round_last(s1, t0, 1);
s2 = aes_dec_round_last(s2, t1, 1);
s3 = aes_dec_round_last(s3, t2, 1);
s0 = aes_dec_round_last(s0, t2, 2);
s1 = aes_dec_round_last(s1, t3, 2);
s2 = aes_dec_round_last(s2, t0, 2);
s3 = aes_dec_round_last(s3, t1, 2);
s0 = aes_dec_round_last(s0, t1, 3);
s1 = aes_dec_round_last(s1, t2, 3);
s2 = aes_dec_round_last(s2, t3, 3);
s3 = aes_dec_round_last(s3, t0, 3);
if(((int)out & 3) == 0){
((volatile unsigned int*)out)[0] = s0;
((volatile unsigned int*)out)[1] = s1;
((volatile unsigned int*)out)[2] = s2;
((volatile unsigned int*)out)[3] = s3;
} else {
vexriscv_aes_store_unaligned(out + 0, s0);
vexriscv_aes_store_unaligned(out + 4, s1);
vexriscv_aes_store_unaligned(out + 8, s2);
vexriscv_aes_store_unaligned(out + 12, s3);
}
}