-/* $OpenBSD: aes_core.c,v 1.17 2024/03/27 06:51:59 jsing Exp $ */
+/* $OpenBSD: aes_core.c,v 1.18 2024/03/27 08:24:13 jsing Exp $ */
/**
* rijndael-alg-fst.c
*
#include "aes_local.h"
#include "crypto_internal.h"
-#ifndef AES_ASM
/*
Te0[x] = S [x].[02, 01, 01, 03];
Te1[x] = S [x].[03, 02, 01, 01];
return 0;
}
+#ifndef AES_ASM
/*
* Encrypt a single block
* in and out can overlap
rk[3];
PUTU32(out + 12, s3);
}
-
-#else /* AES_ASM */
-
-static const u8 Te4[256] = {
- 0x63U, 0x7cU, 0x77U, 0x7bU, 0xf2U, 0x6bU, 0x6fU, 0xc5U,
- 0x30U, 0x01U, 0x67U, 0x2bU, 0xfeU, 0xd7U, 0xabU, 0x76U,
- 0xcaU, 0x82U, 0xc9U, 0x7dU, 0xfaU, 0x59U, 0x47U, 0xf0U,
- 0xadU, 0xd4U, 0xa2U, 0xafU, 0x9cU, 0xa4U, 0x72U, 0xc0U,
- 0xb7U, 0xfdU, 0x93U, 0x26U, 0x36U, 0x3fU, 0xf7U, 0xccU,
- 0x34U, 0xa5U, 0xe5U, 0xf1U, 0x71U, 0xd8U, 0x31U, 0x15U,
- 0x04U, 0xc7U, 0x23U, 0xc3U, 0x18U, 0x96U, 0x05U, 0x9aU,
- 0x07U, 0x12U, 0x80U, 0xe2U, 0xebU, 0x27U, 0xb2U, 0x75U,
- 0x09U, 0x83U, 0x2cU, 0x1aU, 0x1bU, 0x6eU, 0x5aU, 0xa0U,
- 0x52U, 0x3bU, 0xd6U, 0xb3U, 0x29U, 0xe3U, 0x2fU, 0x84U,
- 0x53U, 0xd1U, 0x00U, 0xedU, 0x20U, 0xfcU, 0xb1U, 0x5bU,
- 0x6aU, 0xcbU, 0xbeU, 0x39U, 0x4aU, 0x4cU, 0x58U, 0xcfU,
- 0xd0U, 0xefU, 0xaaU, 0xfbU, 0x43U, 0x4dU, 0x33U, 0x85U,
- 0x45U, 0xf9U, 0x02U, 0x7fU, 0x50U, 0x3cU, 0x9fU, 0xa8U,
- 0x51U, 0xa3U, 0x40U, 0x8fU, 0x92U, 0x9dU, 0x38U, 0xf5U,
- 0xbcU, 0xb6U, 0xdaU, 0x21U, 0x10U, 0xffU, 0xf3U, 0xd2U,
- 0xcdU, 0x0cU, 0x13U, 0xecU, 0x5fU, 0x97U, 0x44U, 0x17U,
- 0xc4U, 0xa7U, 0x7eU, 0x3dU, 0x64U, 0x5dU, 0x19U, 0x73U,
- 0x60U, 0x81U, 0x4fU, 0xdcU, 0x22U, 0x2aU, 0x90U, 0x88U,
- 0x46U, 0xeeU, 0xb8U, 0x14U, 0xdeU, 0x5eU, 0x0bU, 0xdbU,
- 0xe0U, 0x32U, 0x3aU, 0x0aU, 0x49U, 0x06U, 0x24U, 0x5cU,
- 0xc2U, 0xd3U, 0xacU, 0x62U, 0x91U, 0x95U, 0xe4U, 0x79U,
- 0xe7U, 0xc8U, 0x37U, 0x6dU, 0x8dU, 0xd5U, 0x4eU, 0xa9U,
- 0x6cU, 0x56U, 0xf4U, 0xeaU, 0x65U, 0x7aU, 0xaeU, 0x08U,
- 0xbaU, 0x78U, 0x25U, 0x2eU, 0x1cU, 0xa6U, 0xb4U, 0xc6U,
- 0xe8U, 0xddU, 0x74U, 0x1fU, 0x4bU, 0xbdU, 0x8bU, 0x8aU,
- 0x70U, 0x3eU, 0xb5U, 0x66U, 0x48U, 0x03U, 0xf6U, 0x0eU,
- 0x61U, 0x35U, 0x57U, 0xb9U, 0x86U, 0xc1U, 0x1dU, 0x9eU,
- 0xe1U, 0xf8U, 0x98U, 0x11U, 0x69U, 0xd9U, 0x8eU, 0x94U,
- 0x9bU, 0x1eU, 0x87U, 0xe9U, 0xceU, 0x55U, 0x28U, 0xdfU,
- 0x8cU, 0xa1U, 0x89U, 0x0dU, 0xbfU, 0xe6U, 0x42U, 0x68U,
- 0x41U, 0x99U, 0x2dU, 0x0fU, 0xb0U, 0x54U, 0xbbU, 0x16U
-};
-static const u32 rcon[] = {
- 0x01000000, 0x02000000, 0x04000000, 0x08000000,
- 0x10000000, 0x20000000, 0x40000000, 0x80000000,
- 0x1B000000, 0x36000000,
- /* for 128-bit blocks, Rijndael never uses more than 10 rcon values */
-};
-
-/**
- * Expand the cipher key into the encryption key schedule.
- */
-int
-AES_set_encrypt_key(const unsigned char *userKey, const int bits, AES_KEY *key)
-{
- u32 *rk;
- int i = 0;
- u32 temp;
-
- if (!userKey || !key)
- return -1;
- if (bits != 128 && bits != 192 && bits != 256)
- return -2;
-
- rk = key->rd_key;
-
- if (bits == 128)
- key->rounds = 10;
- else if (bits == 192)
- key->rounds = 12;
- else
- key->rounds = 14;
-
- rk[0] = GETU32(userKey);
- rk[1] = GETU32(userKey + 4);
- rk[2] = GETU32(userKey + 8);
- rk[3] = GETU32(userKey + 12);
- if (bits == 128) {
- while (1) {
- temp = rk[3];
- rk[4] = rk[0] ^
- (Te4[(temp >> 16) & 0xff] << 24) ^
- (Te4[(temp >> 8) & 0xff] << 16) ^
- (Te4[(temp) & 0xff] << 8) ^
- (Te4[(temp >> 24)]) ^
- rcon[i];
- rk[5] = rk[1] ^ rk[4];
- rk[6] = rk[2] ^ rk[5];
- rk[7] = rk[3] ^ rk[6];
- if (++i == 10) {
- return 0;
- }
- rk += 4;
- }
- }
- rk[4] = GETU32(userKey + 16);
- rk[5] = GETU32(userKey + 20);
- if (bits == 192) {
- while (1) {
- temp = rk[5];
- rk[6] = rk[0] ^
- (Te4[(temp >> 16) & 0xff] << 24) ^
- (Te4[(temp >> 8) & 0xff] << 16) ^
- (Te4[(temp) & 0xff] << 8) ^
- (Te4[(temp >> 24)]) ^
- rcon[i];
- rk[7] = rk[1] ^ rk[6];
- rk[8] = rk[2] ^ rk[7];
- rk[9] = rk[3] ^ rk[8];
- if (++i == 8) {
- return 0;
- }
- rk[10] = rk[4] ^ rk[9];
- rk[11] = rk[5] ^ rk[10];
- rk += 6;
- }
- }
- rk[6] = GETU32(userKey + 24);
- rk[7] = GETU32(userKey + 28);
- if (bits == 256) {
- while (1) {
- temp = rk[7];
- rk[8] = rk[0] ^
- (Te4[(temp >> 16) & 0xff] << 24) ^
- (Te4[(temp >> 8) & 0xff] << 16) ^
- (Te4[(temp) & 0xff] << 8) ^
- (Te4[(temp >> 24)]) ^
- rcon[i];
- rk[9] = rk[1] ^ rk[8];
- rk[10] = rk[2] ^ rk[9];
- rk[11] = rk[3] ^ rk[10];
- if (++i == 7) {
- return 0;
- }
- temp = rk[11];
- rk[12] = rk[4] ^
- (Te4[(temp >> 24)] << 24) ^
- (Te4[(temp >> 16) & 0xff] << 16) ^
- (Te4[(temp >> 8) & 0xff] << 8) ^
- (Te4[(temp) & 0xff]);
- rk[13] = rk[5] ^ rk[12];
- rk[14] = rk[6] ^ rk[13];
- rk[15] = rk[7] ^ rk[14];
-
- rk += 8;
- }
- }
- return 0;
-}
-
-/**
- * Expand the cipher key into the decryption key schedule.
- */
-int
-AES_set_decrypt_key(const unsigned char *userKey, const int bits,
- AES_KEY *key)
-{
- u32 *rk;
- int i, j, status;
- u32 temp;
-
- /* first, start with an encryption schedule */
- status = AES_set_encrypt_key(userKey, bits, key);
- if (status < 0)
- return status;
-
- rk = key->rd_key;
-
- /* invert the order of the round keys: */
- for (i = 0, j = 4*(key->rounds); i < j; i += 4, j -= 4) {
- temp = rk[i];
- rk[i] = rk[j];
- rk[j] = temp;
- temp = rk[i + 1];
- rk[i + 1] = rk[j + 1];
- rk[j + 1] = temp;
- temp = rk[i + 2];
- rk[i + 2] = rk[j + 2];
- rk[j + 2] = temp;
- temp = rk[i + 3];
- rk[i + 3] = rk[j + 3];
- rk[j + 3] = temp;
- }
- /* apply the inverse MixColumn transform to all round keys but the first and the last: */
- for (i = 1; i < (key->rounds); i++) {
- rk += 4;
- for (j = 0; j < 4; j++) {
- u32 tp1, tp2, tp4, tp8, tp9, tpb, tpd, tpe, m;
-
- tp1 = rk[j];
- m = tp1 & 0x80808080;
- tp2 = ((tp1 & 0x7f7f7f7f) << 1) ^
- ((m - (m >> 7)) & 0x1b1b1b1b);
- m = tp2 & 0x80808080;
- tp4 = ((tp2 & 0x7f7f7f7f) << 1) ^
- ((m - (m >> 7)) & 0x1b1b1b1b);
- m = tp4 & 0x80808080;
- tp8 = ((tp4 & 0x7f7f7f7f) << 1) ^
- ((m - (m >> 7)) & 0x1b1b1b1b);
- tp9 = tp8 ^ tp1;
- tpb = tp9 ^ tp2;
- tpd = tp9 ^ tp4;
- tpe = tp8 ^ tp4 ^ tp2;
-
- rk[j] = tpe ^ crypto_rol_u32(tpd, 16) ^
- crypto_rol_u32(tp9, 24) ^ crypto_rol_u32(tpb, 8);
- }
- }
- return 0;
-}
-
#endif /* AES_ASM */
projects / openbsd / commitdiff