cleanup qemu/util code
This commit is contained in:
Nguyen Anh Quynh
593
qemu/util/aes.c
593
qemu/util/aes.c
@ -1057,596 +1057,3 @@ const uint32_t AES_Td4[256] = {
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0xe1e1e1e1U, 0x69696969U, 0x14141414U, 0x63636363U,
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0x55555555U, 0x21212121U, 0x0c0c0c0cU, 0x7d7d7d7dU,
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};
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static const u32 rcon[] = {
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0x01000000, 0x02000000, 0x04000000, 0x08000000,
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0x10000000, 0x20000000, 0x40000000, 0x80000000,
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0x1B000000, 0x36000000, /* for 128-bit blocks, Rijndael never uses more than 10 rcon values */
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};
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/**
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* Expand the cipher key into the encryption key schedule.
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*/
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int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
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AES_KEY *key) {
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u32 *rk;
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int i = 0;
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u32 temp;
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if (!userKey || !key)
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return -1;
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if (bits != 128 && bits != 192 && bits != 256)
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return -2;
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rk = key->rd_key;
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if (bits==128)
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key->rounds = 10;
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else if (bits==192)
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key->rounds = 12;
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else
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key->rounds = 14;
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rk[0] = GETU32(userKey );
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rk[1] = GETU32(userKey + 4);
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rk[2] = GETU32(userKey + 8);
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rk[3] = GETU32(userKey + 12);
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if (bits == 128) {
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while (1) {
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temp = rk[3];
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rk[4] = rk[0] ^
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(AES_Te4[(temp >> 16) & 0xff] & 0xff000000) ^
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(AES_Te4[(temp >> 8) & 0xff] & 0x00ff0000) ^
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(AES_Te4[(temp ) & 0xff] & 0x0000ff00) ^
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(AES_Te4[(temp >> 24) ] & 0x000000ff) ^
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rcon[i];
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rk[5] = rk[1] ^ rk[4];
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rk[6] = rk[2] ^ rk[5];
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rk[7] = rk[3] ^ rk[6];
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if (++i == 10) {
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return 0;
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}
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rk += 4;
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}
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}
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rk[4] = GETU32(userKey + 16);
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rk[5] = GETU32(userKey + 20);
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if (bits == 192) {
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while (1) {
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temp = rk[ 5];
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rk[ 6] = rk[ 0] ^
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(AES_Te4[(temp >> 16) & 0xff] & 0xff000000) ^
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(AES_Te4[(temp >> 8) & 0xff] & 0x00ff0000) ^
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(AES_Te4[(temp ) & 0xff] & 0x0000ff00) ^
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(AES_Te4[(temp >> 24) ] & 0x000000ff) ^
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rcon[i];
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rk[ 7] = rk[ 1] ^ rk[ 6];
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rk[ 8] = rk[ 2] ^ rk[ 7];
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rk[ 9] = rk[ 3] ^ rk[ 8];
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if (++i == 8) {
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return 0;
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}
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rk[10] = rk[ 4] ^ rk[ 9];
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rk[11] = rk[ 5] ^ rk[10];
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rk += 6;
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}
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}
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rk[6] = GETU32(userKey + 24);
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rk[7] = GETU32(userKey + 28);
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if (bits == 256) {
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while (1) {
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temp = rk[ 7];
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rk[ 8] = rk[ 0] ^
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(AES_Te4[(temp >> 16) & 0xff] & 0xff000000) ^
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(AES_Te4[(temp >> 8) & 0xff] & 0x00ff0000) ^
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(AES_Te4[(temp ) & 0xff] & 0x0000ff00) ^
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(AES_Te4[(temp >> 24) ] & 0x000000ff) ^
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rcon[i];
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rk[ 9] = rk[ 1] ^ rk[ 8];
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rk[10] = rk[ 2] ^ rk[ 9];
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rk[11] = rk[ 3] ^ rk[10];
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if (++i == 7) {
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return 0;
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}
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temp = rk[11];
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rk[12] = rk[ 4] ^
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(AES_Te4[(temp >> 24) ] & 0xff000000) ^
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(AES_Te4[(temp >> 16) & 0xff] & 0x00ff0000) ^
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(AES_Te4[(temp >> 8) & 0xff] & 0x0000ff00) ^
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(AES_Te4[(temp ) & 0xff] & 0x000000ff);
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rk[13] = rk[ 5] ^ rk[12];
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rk[14] = rk[ 6] ^ rk[13];
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rk[15] = rk[ 7] ^ rk[14];
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rk += 8;
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}
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}
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return 0;
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}
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/**
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* Expand the cipher key into the decryption key schedule.
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*/
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int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
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AES_KEY *key) {
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u32 *rk;
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int i, j, status;
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u32 temp;
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/* first, start with an encryption schedule */
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status = AES_set_encrypt_key(userKey, bits, key);
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if (status < 0)
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return status;
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rk = key->rd_key;
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/* invert the order of the round keys: */
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for (i = 0, j = 4*(key->rounds); i < j; i += 4, j -= 4) {
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temp = rk[i ]; rk[i ] = rk[j ]; rk[j ] = temp;
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temp = rk[i + 1]; rk[i + 1] = rk[j + 1]; rk[j + 1] = temp;
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temp = rk[i + 2]; rk[i + 2] = rk[j + 2]; rk[j + 2] = temp;
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temp = rk[i + 3]; rk[i + 3] = rk[j + 3]; rk[j + 3] = temp;
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}
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/* apply the inverse MixColumn transform to all round keys but the first and the last: */
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for (i = 1; i < (key->rounds); i++) {
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rk += 4;
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rk[0] =
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AES_Td0[AES_Te4[(rk[0] >> 24) ] & 0xff] ^
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AES_Td1[AES_Te4[(rk[0] >> 16) & 0xff] & 0xff] ^
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AES_Td2[AES_Te4[(rk[0] >> 8) & 0xff] & 0xff] ^
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AES_Td3[AES_Te4[(rk[0] ) & 0xff] & 0xff];
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rk[1] =
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AES_Td0[AES_Te4[(rk[1] >> 24) ] & 0xff] ^
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AES_Td1[AES_Te4[(rk[1] >> 16) & 0xff] & 0xff] ^
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AES_Td2[AES_Te4[(rk[1] >> 8) & 0xff] & 0xff] ^
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AES_Td3[AES_Te4[(rk[1] ) & 0xff] & 0xff];
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rk[2] =
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AES_Td0[AES_Te4[(rk[2] >> 24) ] & 0xff] ^
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AES_Td1[AES_Te4[(rk[2] >> 16) & 0xff] & 0xff] ^
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AES_Td2[AES_Te4[(rk[2] >> 8) & 0xff] & 0xff] ^
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AES_Td3[AES_Te4[(rk[2] ) & 0xff] & 0xff];
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rk[3] =
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AES_Td0[AES_Te4[(rk[3] >> 24) ] & 0xff] ^
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AES_Td1[AES_Te4[(rk[3] >> 16) & 0xff] & 0xff] ^
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AES_Td2[AES_Te4[(rk[3] >> 8) & 0xff] & 0xff] ^
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AES_Td3[AES_Te4[(rk[3] ) & 0xff] & 0xff];
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}
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return 0;
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}
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#ifndef AES_ASM
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/*
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* Encrypt a single block
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* in and out can overlap
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*/
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void AES_encrypt(const unsigned char *in, unsigned char *out,
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const AES_KEY *key) {
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const u32 *rk;
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u32 s0, s1, s2, s3, t0, t1, t2, t3;
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#ifndef FULL_UNROLL
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int r;
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#endif /* ?FULL_UNROLL */
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assert(in && out && key);
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rk = key->rd_key;
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/*
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* map byte array block to cipher state
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* and add initial round key:
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*/
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s0 = GETU32(in ) ^ rk[0];
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s1 = GETU32(in + 4) ^ rk[1];
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s2 = GETU32(in + 8) ^ rk[2];
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s3 = GETU32(in + 12) ^ rk[3];
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#ifdef FULL_UNROLL
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/* round 1: */
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t0 = AES_Te0[s0 >> 24] ^ AES_Te1[(s1 >> 16) & 0xff] ^ AES_Te2[(s2 >> 8) & 0xff] ^ AES_Te3[s3 & 0xff] ^ rk[ 4];
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t1 = AES_Te0[s1 >> 24] ^ AES_Te1[(s2 >> 16) & 0xff] ^ AES_Te2[(s3 >> 8) & 0xff] ^ AES_Te3[s0 & 0xff] ^ rk[ 5];
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t2 = AES_Te0[s2 >> 24] ^ AES_Te1[(s3 >> 16) & 0xff] ^ AES_Te2[(s0 >> 8) & 0xff] ^ AES_Te3[s1 & 0xff] ^ rk[ 6];
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t3 = AES_Te0[s3 >> 24] ^ AES_Te1[(s0 >> 16) & 0xff] ^ AES_Te2[(s1 >> 8) & 0xff] ^ AES_Te3[s2 & 0xff] ^ rk[ 7];
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/* round 2: */
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s0 = AES_Te0[t0 >> 24] ^ AES_Te1[(t1 >> 16) & 0xff] ^ AES_Te2[(t2 >> 8) & 0xff] ^ AES_Te3[t3 & 0xff] ^ rk[ 8];
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s1 = AES_Te0[t1 >> 24] ^ AES_Te1[(t2 >> 16) & 0xff] ^ AES_Te2[(t3 >> 8) & 0xff] ^ AES_Te3[t0 & 0xff] ^ rk[ 9];
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s2 = AES_Te0[t2 >> 24] ^ AES_Te1[(t3 >> 16) & 0xff] ^ AES_Te2[(t0 >> 8) & 0xff] ^ AES_Te3[t1 & 0xff] ^ rk[10];
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s3 = AES_Te0[t3 >> 24] ^ AES_Te1[(t0 >> 16) & 0xff] ^ AES_Te2[(t1 >> 8) & 0xff] ^ AES_Te3[t2 & 0xff] ^ rk[11];
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/* round 3: */
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t0 = AES_Te0[s0 >> 24] ^ AES_Te1[(s1 >> 16) & 0xff] ^ AES_Te2[(s2 >> 8) & 0xff] ^ AES_Te3[s3 & 0xff] ^ rk[12];
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t1 = AES_Te0[s1 >> 24] ^ AES_Te1[(s2 >> 16) & 0xff] ^ AES_Te2[(s3 >> 8) & 0xff] ^ AES_Te3[s0 & 0xff] ^ rk[13];
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t2 = AES_Te0[s2 >> 24] ^ AES_Te1[(s3 >> 16) & 0xff] ^ AES_Te2[(s0 >> 8) & 0xff] ^ AES_Te3[s1 & 0xff] ^ rk[14];
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t3 = AES_Te0[s3 >> 24] ^ AES_Te1[(s0 >> 16) & 0xff] ^ AES_Te2[(s1 >> 8) & 0xff] ^ AES_Te3[s2 & 0xff] ^ rk[15];
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/* round 4: */
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s0 = AES_Te0[t0 >> 24] ^ AES_Te1[(t1 >> 16) & 0xff] ^ AES_Te2[(t2 >> 8) & 0xff] ^ AES_Te3[t3 & 0xff] ^ rk[16];
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s1 = AES_Te0[t1 >> 24] ^ AES_Te1[(t2 >> 16) & 0xff] ^ AES_Te2[(t3 >> 8) & 0xff] ^ AES_Te3[t0 & 0xff] ^ rk[17];
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s2 = AES_Te0[t2 >> 24] ^ AES_Te1[(t3 >> 16) & 0xff] ^ AES_Te2[(t0 >> 8) & 0xff] ^ AES_Te3[t1 & 0xff] ^ rk[18];
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s3 = AES_Te0[t3 >> 24] ^ AES_Te1[(t0 >> 16) & 0xff] ^ AES_Te2[(t1 >> 8) & 0xff] ^ AES_Te3[t2 & 0xff] ^ rk[19];
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/* round 5: */
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t0 = AES_Te0[s0 >> 24] ^ AES_Te1[(s1 >> 16) & 0xff] ^ AES_Te2[(s2 >> 8) & 0xff] ^ AES_Te3[s3 & 0xff] ^ rk[20];
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t1 = AES_Te0[s1 >> 24] ^ AES_Te1[(s2 >> 16) & 0xff] ^ AES_Te2[(s3 >> 8) & 0xff] ^ AES_Te3[s0 & 0xff] ^ rk[21];
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t2 = AES_Te0[s2 >> 24] ^ AES_Te1[(s3 >> 16) & 0xff] ^ AES_Te2[(s0 >> 8) & 0xff] ^ AES_Te3[s1 & 0xff] ^ rk[22];
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t3 = AES_Te0[s3 >> 24] ^ AES_Te1[(s0 >> 16) & 0xff] ^ AES_Te2[(s1 >> 8) & 0xff] ^ AES_Te3[s2 & 0xff] ^ rk[23];
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/* round 6: */
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s0 = AES_Te0[t0 >> 24] ^ AES_Te1[(t1 >> 16) & 0xff] ^ AES_Te2[(t2 >> 8) & 0xff] ^ AES_Te3[t3 & 0xff] ^ rk[24];
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s1 = AES_Te0[t1 >> 24] ^ AES_Te1[(t2 >> 16) & 0xff] ^ AES_Te2[(t3 >> 8) & 0xff] ^ AES_Te3[t0 & 0xff] ^ rk[25];
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s2 = AES_Te0[t2 >> 24] ^ AES_Te1[(t3 >> 16) & 0xff] ^ AES_Te2[(t0 >> 8) & 0xff] ^ AES_Te3[t1 & 0xff] ^ rk[26];
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s3 = AES_Te0[t3 >> 24] ^ AES_Te1[(t0 >> 16) & 0xff] ^ AES_Te2[(t1 >> 8) & 0xff] ^ AES_Te3[t2 & 0xff] ^ rk[27];
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/* round 7: */
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t0 = AES_Te0[s0 >> 24] ^ AES_Te1[(s1 >> 16) & 0xff] ^ AES_Te2[(s2 >> 8) & 0xff] ^ AES_Te3[s3 & 0xff] ^ rk[28];
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t1 = AES_Te0[s1 >> 24] ^ AES_Te1[(s2 >> 16) & 0xff] ^ AES_Te2[(s3 >> 8) & 0xff] ^ AES_Te3[s0 & 0xff] ^ rk[29];
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t2 = AES_Te0[s2 >> 24] ^ AES_Te1[(s3 >> 16) & 0xff] ^ AES_Te2[(s0 >> 8) & 0xff] ^ AES_Te3[s1 & 0xff] ^ rk[30];
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t3 = AES_Te0[s3 >> 24] ^ AES_Te1[(s0 >> 16) & 0xff] ^ AES_Te2[(s1 >> 8) & 0xff] ^ AES_Te3[s2 & 0xff] ^ rk[31];
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/* round 8: */
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s0 = AES_Te0[t0 >> 24] ^ AES_Te1[(t1 >> 16) & 0xff] ^ AES_Te2[(t2 >> 8) & 0xff] ^ AES_Te3[t3 & 0xff] ^ rk[32];
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s1 = AES_Te0[t1 >> 24] ^ AES_Te1[(t2 >> 16) & 0xff] ^ AES_Te2[(t3 >> 8) & 0xff] ^ AES_Te3[t0 & 0xff] ^ rk[33];
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s2 = AES_Te0[t2 >> 24] ^ AES_Te1[(t3 >> 16) & 0xff] ^ AES_Te2[(t0 >> 8) & 0xff] ^ AES_Te3[t1 & 0xff] ^ rk[34];
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s3 = AES_Te0[t3 >> 24] ^ AES_Te1[(t0 >> 16) & 0xff] ^ AES_Te2[(t1 >> 8) & 0xff] ^ AES_Te3[t2 & 0xff] ^ rk[35];
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/* round 9: */
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t0 = AES_Te0[s0 >> 24] ^ AES_Te1[(s1 >> 16) & 0xff] ^ AES_Te2[(s2 >> 8) & 0xff] ^ AES_Te3[s3 & 0xff] ^ rk[36];
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t1 = AES_Te0[s1 >> 24] ^ AES_Te1[(s2 >> 16) & 0xff] ^ AES_Te2[(s3 >> 8) & 0xff] ^ AES_Te3[s0 & 0xff] ^ rk[37];
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t2 = AES_Te0[s2 >> 24] ^ AES_Te1[(s3 >> 16) & 0xff] ^ AES_Te2[(s0 >> 8) & 0xff] ^ AES_Te3[s1 & 0xff] ^ rk[38];
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t3 = AES_Te0[s3 >> 24] ^ AES_Te1[(s0 >> 16) & 0xff] ^ AES_Te2[(s1 >> 8) & 0xff] ^ AES_Te3[s2 & 0xff] ^ rk[39];
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if (key->rounds > 10) {
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/* round 10: */
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s0 = AES_Te0[t0 >> 24] ^ AES_Te1[(t1 >> 16) & 0xff] ^ AES_Te2[(t2 >> 8) & 0xff] ^ AES_Te3[t3 & 0xff] ^ rk[40];
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s1 = AES_Te0[t1 >> 24] ^ AES_Te1[(t2 >> 16) & 0xff] ^ AES_Te2[(t3 >> 8) & 0xff] ^ AES_Te3[t0 & 0xff] ^ rk[41];
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s2 = AES_Te0[t2 >> 24] ^ AES_Te1[(t3 >> 16) & 0xff] ^ AES_Te2[(t0 >> 8) & 0xff] ^ AES_Te3[t1 & 0xff] ^ rk[42];
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s3 = AES_Te0[t3 >> 24] ^ AES_Te1[(t0 >> 16) & 0xff] ^ AES_Te2[(t1 >> 8) & 0xff] ^ AES_Te3[t2 & 0xff] ^ rk[43];
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/* round 11: */
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t0 = AES_Te0[s0 >> 24] ^ AES_Te1[(s1 >> 16) & 0xff] ^ AES_Te2[(s2 >> 8) & 0xff] ^ AES_Te3[s3 & 0xff] ^ rk[44];
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t1 = AES_Te0[s1 >> 24] ^ AES_Te1[(s2 >> 16) & 0xff] ^ AES_Te2[(s3 >> 8) & 0xff] ^ AES_Te3[s0 & 0xff] ^ rk[45];
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t2 = AES_Te0[s2 >> 24] ^ AES_Te1[(s3 >> 16) & 0xff] ^ AES_Te2[(s0 >> 8) & 0xff] ^ AES_Te3[s1 & 0xff] ^ rk[46];
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t3 = AES_Te0[s3 >> 24] ^ AES_Te1[(s0 >> 16) & 0xff] ^ AES_Te2[(s1 >> 8) & 0xff] ^ AES_Te3[s2 & 0xff] ^ rk[47];
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if (key->rounds > 12) {
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/* round 12: */
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s0 = AES_Te0[t0 >> 24] ^ AES_Te1[(t1 >> 16) & 0xff] ^ AES_Te2[(t2 >> 8) & 0xff] ^ AES_Te3[t3 & 0xff] ^ rk[48];
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s1 = AES_Te0[t1 >> 24] ^ AES_Te1[(t2 >> 16) & 0xff] ^ AES_Te2[(t3 >> 8) & 0xff] ^ AES_Te3[t0 & 0xff] ^ rk[49];
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s2 = AES_Te0[t2 >> 24] ^ AES_Te1[(t3 >> 16) & 0xff] ^ AES_Te2[(t0 >> 8) & 0xff] ^ AES_Te3[t1 & 0xff] ^ rk[50];
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s3 = AES_Te0[t3 >> 24] ^ AES_Te1[(t0 >> 16) & 0xff] ^ AES_Te2[(t1 >> 8) & 0xff] ^ AES_Te3[t2 & 0xff] ^ rk[51];
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/* round 13: */
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t0 = AES_Te0[s0 >> 24] ^ AES_Te1[(s1 >> 16) & 0xff] ^ AES_Te2[(s2 >> 8) & 0xff] ^ AES_Te3[s3 & 0xff] ^ rk[52];
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t1 = AES_Te0[s1 >> 24] ^ AES_Te1[(s2 >> 16) & 0xff] ^ AES_Te2[(s3 >> 8) & 0xff] ^ AES_Te3[s0 & 0xff] ^ rk[53];
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t2 = AES_Te0[s2 >> 24] ^ AES_Te1[(s3 >> 16) & 0xff] ^ AES_Te2[(s0 >> 8) & 0xff] ^ AES_Te3[s1 & 0xff] ^ rk[54];
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t3 = AES_Te0[s3 >> 24] ^ AES_Te1[(s0 >> 16) & 0xff] ^ AES_Te2[(s1 >> 8) & 0xff] ^ AES_Te3[s2 & 0xff] ^ rk[55];
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}
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}
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rk += key->rounds << 2;
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#else /* !FULL_UNROLL */
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/*
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* Nr - 1 full rounds:
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*/
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r = key->rounds >> 1;
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for (;;) {
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t0 =
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AES_Te0[(s0 >> 24) ] ^
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AES_Te1[(s1 >> 16) & 0xff] ^
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AES_Te2[(s2 >> 8) & 0xff] ^
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AES_Te3[(s3 ) & 0xff] ^
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rk[4];
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t1 =
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AES_Te0[(s1 >> 24) ] ^
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AES_Te1[(s2 >> 16) & 0xff] ^
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AES_Te2[(s3 >> 8) & 0xff] ^
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AES_Te3[(s0 ) & 0xff] ^
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rk[5];
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t2 =
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AES_Te0[(s2 >> 24) ] ^
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AES_Te1[(s3 >> 16) & 0xff] ^
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AES_Te2[(s0 >> 8) & 0xff] ^
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AES_Te3[(s1 ) & 0xff] ^
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rk[6];
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t3 =
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AES_Te0[(s3 >> 24) ] ^
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AES_Te1[(s0 >> 16) & 0xff] ^
|
||||
AES_Te2[(s1 >> 8) & 0xff] ^
|
||||
AES_Te3[(s2 ) & 0xff] ^
|
||||
rk[7];
|
||||
|
||||
rk += 8;
|
||||
if (--r == 0) {
|
||||
break;
|
||||
}
|
||||
|
||||
s0 =
|
||||
AES_Te0[(t0 >> 24) ] ^
|
||||
AES_Te1[(t1 >> 16) & 0xff] ^
|
||||
AES_Te2[(t2 >> 8) & 0xff] ^
|
||||
AES_Te3[(t3 ) & 0xff] ^
|
||||
rk[0];
|
||||
s1 =
|
||||
AES_Te0[(t1 >> 24) ] ^
|
||||
AES_Te1[(t2 >> 16) & 0xff] ^
|
||||
AES_Te2[(t3 >> 8) & 0xff] ^
|
||||
AES_Te3[(t0 ) & 0xff] ^
|
||||
rk[1];
|
||||
s2 =
|
||||
AES_Te0[(t2 >> 24) ] ^
|
||||
AES_Te1[(t3 >> 16) & 0xff] ^
|
||||
AES_Te2[(t0 >> 8) & 0xff] ^
|
||||
AES_Te3[(t1 ) & 0xff] ^
|
||||
rk[2];
|
||||
s3 =
|
||||
AES_Te0[(t3 >> 24) ] ^
|
||||
AES_Te1[(t0 >> 16) & 0xff] ^
|
||||
AES_Te2[(t1 >> 8) & 0xff] ^
|
||||
AES_Te3[(t2 ) & 0xff] ^
|
||||
rk[3];
|
||||
}
|
||||
#endif /* ?FULL_UNROLL */
|
||||
/*
|
||||
* apply last round and
|
||||
* map cipher state to byte array block:
|
||||
*/
|
||||
s0 =
|
||||
(AES_Te4[(t0 >> 24) ] & 0xff000000) ^
|
||||
(AES_Te4[(t1 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AES_Te4[(t2 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AES_Te4[(t3 ) & 0xff] & 0x000000ff) ^
|
||||
rk[0];
|
||||
PUTU32(out , s0);
|
||||
s1 =
|
||||
(AES_Te4[(t1 >> 24) ] & 0xff000000) ^
|
||||
(AES_Te4[(t2 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AES_Te4[(t3 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AES_Te4[(t0 ) & 0xff] & 0x000000ff) ^
|
||||
rk[1];
|
||||
PUTU32(out + 4, s1);
|
||||
s2 =
|
||||
(AES_Te4[(t2 >> 24) ] & 0xff000000) ^
|
||||
(AES_Te4[(t3 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AES_Te4[(t0 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AES_Te4[(t1 ) & 0xff] & 0x000000ff) ^
|
||||
rk[2];
|
||||
PUTU32(out + 8, s2);
|
||||
s3 =
|
||||
(AES_Te4[(t3 >> 24) ] & 0xff000000) ^
|
||||
(AES_Te4[(t0 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AES_Te4[(t1 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AES_Te4[(t2 ) & 0xff] & 0x000000ff) ^
|
||||
rk[3];
|
||||
PUTU32(out + 12, s3);
|
||||
}
|
||||
|
||||
/*
|
||||
* Decrypt a single block
|
||||
* in and out can overlap
|
||||
*/
|
||||
void AES_decrypt(const unsigned char *in, unsigned char *out,
|
||||
const AES_KEY *key) {
|
||||
|
||||
const u32 *rk;
|
||||
u32 s0, s1, s2, s3, t0, t1, t2, t3;
|
||||
#ifndef FULL_UNROLL
|
||||
int r;
|
||||
#endif /* ?FULL_UNROLL */
|
||||
|
||||
assert(in && out && key);
|
||||
rk = key->rd_key;
|
||||
|
||||
/*
|
||||
* map byte array block to cipher state
|
||||
* and add initial round key:
|
||||
*/
|
||||
s0 = GETU32(in ) ^ rk[0];
|
||||
s1 = GETU32(in + 4) ^ rk[1];
|
||||
s2 = GETU32(in + 8) ^ rk[2];
|
||||
s3 = GETU32(in + 12) ^ rk[3];
|
||||
#ifdef FULL_UNROLL
|
||||
/* round 1: */
|
||||
t0 = AES_Td0[s0 >> 24] ^ AES_Td1[(s3 >> 16) & 0xff] ^ AES_Td2[(s2 >> 8) & 0xff] ^ AES_Td3[s1 & 0xff] ^ rk[ 4];
|
||||
t1 = AES_Td0[s1 >> 24] ^ AES_Td1[(s0 >> 16) & 0xff] ^ AES_Td2[(s3 >> 8) & 0xff] ^ AES_Td3[s2 & 0xff] ^ rk[ 5];
|
||||
t2 = AES_Td0[s2 >> 24] ^ AES_Td1[(s1 >> 16) & 0xff] ^ AES_Td2[(s0 >> 8) & 0xff] ^ AES_Td3[s3 & 0xff] ^ rk[ 6];
|
||||
t3 = AES_Td0[s3 >> 24] ^ AES_Td1[(s2 >> 16) & 0xff] ^ AES_Td2[(s1 >> 8) & 0xff] ^ AES_Td3[s0 & 0xff] ^ rk[ 7];
|
||||
/* round 2: */
|
||||
s0 = AES_Td0[t0 >> 24] ^ AES_Td1[(t3 >> 16) & 0xff] ^ AES_Td2[(t2 >> 8) & 0xff] ^ AES_Td3[t1 & 0xff] ^ rk[ 8];
|
||||
s1 = AES_Td0[t1 >> 24] ^ AES_Td1[(t0 >> 16) & 0xff] ^ AES_Td2[(t3 >> 8) & 0xff] ^ AES_Td3[t2 & 0xff] ^ rk[ 9];
|
||||
s2 = AES_Td0[t2 >> 24] ^ AES_Td1[(t1 >> 16) & 0xff] ^ AES_Td2[(t0 >> 8) & 0xff] ^ AES_Td3[t3 & 0xff] ^ rk[10];
|
||||
s3 = AES_Td0[t3 >> 24] ^ AES_Td1[(t2 >> 16) & 0xff] ^ AES_Td2[(t1 >> 8) & 0xff] ^ AES_Td3[t0 & 0xff] ^ rk[11];
|
||||
/* round 3: */
|
||||
t0 = AES_Td0[s0 >> 24] ^ AES_Td1[(s3 >> 16) & 0xff] ^ AES_Td2[(s2 >> 8) & 0xff] ^ AES_Td3[s1 & 0xff] ^ rk[12];
|
||||
t1 = AES_Td0[s1 >> 24] ^ AES_Td1[(s0 >> 16) & 0xff] ^ AES_Td2[(s3 >> 8) & 0xff] ^ AES_Td3[s2 & 0xff] ^ rk[13];
|
||||
t2 = AES_Td0[s2 >> 24] ^ AES_Td1[(s1 >> 16) & 0xff] ^ AES_Td2[(s0 >> 8) & 0xff] ^ AES_Td3[s3 & 0xff] ^ rk[14];
|
||||
t3 = AES_Td0[s3 >> 24] ^ AES_Td1[(s2 >> 16) & 0xff] ^ AES_Td2[(s1 >> 8) & 0xff] ^ AES_Td3[s0 & 0xff] ^ rk[15];
|
||||
/* round 4: */
|
||||
s0 = AES_Td0[t0 >> 24] ^ AES_Td1[(t3 >> 16) & 0xff] ^ AES_Td2[(t2 >> 8) & 0xff] ^ AES_Td3[t1 & 0xff] ^ rk[16];
|
||||
s1 = AES_Td0[t1 >> 24] ^ AES_Td1[(t0 >> 16) & 0xff] ^ AES_Td2[(t3 >> 8) & 0xff] ^ AES_Td3[t2 & 0xff] ^ rk[17];
|
||||
s2 = AES_Td0[t2 >> 24] ^ AES_Td1[(t1 >> 16) & 0xff] ^ AES_Td2[(t0 >> 8) & 0xff] ^ AES_Td3[t3 & 0xff] ^ rk[18];
|
||||
s3 = AES_Td0[t3 >> 24] ^ AES_Td1[(t2 >> 16) & 0xff] ^ AES_Td2[(t1 >> 8) & 0xff] ^ AES_Td3[t0 & 0xff] ^ rk[19];
|
||||
/* round 5: */
|
||||
t0 = AES_Td0[s0 >> 24] ^ AES_Td1[(s3 >> 16) & 0xff] ^ AES_Td2[(s2 >> 8) & 0xff] ^ AES_Td3[s1 & 0xff] ^ rk[20];
|
||||
t1 = AES_Td0[s1 >> 24] ^ AES_Td1[(s0 >> 16) & 0xff] ^ AES_Td2[(s3 >> 8) & 0xff] ^ AES_Td3[s2 & 0xff] ^ rk[21];
|
||||
t2 = AES_Td0[s2 >> 24] ^ AES_Td1[(s1 >> 16) & 0xff] ^ AES_Td2[(s0 >> 8) & 0xff] ^ AES_Td3[s3 & 0xff] ^ rk[22];
|
||||
t3 = AES_Td0[s3 >> 24] ^ AES_Td1[(s2 >> 16) & 0xff] ^ AES_Td2[(s1 >> 8) & 0xff] ^ AES_Td3[s0 & 0xff] ^ rk[23];
|
||||
/* round 6: */
|
||||
s0 = AES_Td0[t0 >> 24] ^ AES_Td1[(t3 >> 16) & 0xff] ^ AES_Td2[(t2 >> 8) & 0xff] ^ AES_Td3[t1 & 0xff] ^ rk[24];
|
||||
s1 = AES_Td0[t1 >> 24] ^ AES_Td1[(t0 >> 16) & 0xff] ^ AES_Td2[(t3 >> 8) & 0xff] ^ AES_Td3[t2 & 0xff] ^ rk[25];
|
||||
s2 = AES_Td0[t2 >> 24] ^ AES_Td1[(t1 >> 16) & 0xff] ^ AES_Td2[(t0 >> 8) & 0xff] ^ AES_Td3[t3 & 0xff] ^ rk[26];
|
||||
s3 = AES_Td0[t3 >> 24] ^ AES_Td1[(t2 >> 16) & 0xff] ^ AES_Td2[(t1 >> 8) & 0xff] ^ AES_Td3[t0 & 0xff] ^ rk[27];
|
||||
/* round 7: */
|
||||
t0 = AES_Td0[s0 >> 24] ^ AES_Td1[(s3 >> 16) & 0xff] ^ AES_Td2[(s2 >> 8) & 0xff] ^ AES_Td3[s1 & 0xff] ^ rk[28];
|
||||
t1 = AES_Td0[s1 >> 24] ^ AES_Td1[(s0 >> 16) & 0xff] ^ AES_Td2[(s3 >> 8) & 0xff] ^ AES_Td3[s2 & 0xff] ^ rk[29];
|
||||
t2 = AES_Td0[s2 >> 24] ^ AES_Td1[(s1 >> 16) & 0xff] ^ AES_Td2[(s0 >> 8) & 0xff] ^ AES_Td3[s3 & 0xff] ^ rk[30];
|
||||
t3 = AES_Td0[s3 >> 24] ^ AES_Td1[(s2 >> 16) & 0xff] ^ AES_Td2[(s1 >> 8) & 0xff] ^ AES_Td3[s0 & 0xff] ^ rk[31];
|
||||
/* round 8: */
|
||||
s0 = AES_Td0[t0 >> 24] ^ AES_Td1[(t3 >> 16) & 0xff] ^ AES_Td2[(t2 >> 8) & 0xff] ^ AES_Td3[t1 & 0xff] ^ rk[32];
|
||||
s1 = AES_Td0[t1 >> 24] ^ AES_Td1[(t0 >> 16) & 0xff] ^ AES_Td2[(t3 >> 8) & 0xff] ^ AES_Td3[t2 & 0xff] ^ rk[33];
|
||||
s2 = AES_Td0[t2 >> 24] ^ AES_Td1[(t1 >> 16) & 0xff] ^ AES_Td2[(t0 >> 8) & 0xff] ^ AES_Td3[t3 & 0xff] ^ rk[34];
|
||||
s3 = AES_Td0[t3 >> 24] ^ AES_Td1[(t2 >> 16) & 0xff] ^ AES_Td2[(t1 >> 8) & 0xff] ^ AES_Td3[t0 & 0xff] ^ rk[35];
|
||||
/* round 9: */
|
||||
t0 = AES_Td0[s0 >> 24] ^ AES_Td1[(s3 >> 16) & 0xff] ^ AES_Td2[(s2 >> 8) & 0xff] ^ AES_Td3[s1 & 0xff] ^ rk[36];
|
||||
t1 = AES_Td0[s1 >> 24] ^ AES_Td1[(s0 >> 16) & 0xff] ^ AES_Td2[(s3 >> 8) & 0xff] ^ AES_Td3[s2 & 0xff] ^ rk[37];
|
||||
t2 = AES_Td0[s2 >> 24] ^ AES_Td1[(s1 >> 16) & 0xff] ^ AES_Td2[(s0 >> 8) & 0xff] ^ AES_Td3[s3 & 0xff] ^ rk[38];
|
||||
t3 = AES_Td0[s3 >> 24] ^ AES_Td1[(s2 >> 16) & 0xff] ^ AES_Td2[(s1 >> 8) & 0xff] ^ AES_Td3[s0 & 0xff] ^ rk[39];
|
||||
if (key->rounds > 10) {
|
||||
/* round 10: */
|
||||
s0 = AES_Td0[t0 >> 24] ^ AES_Td1[(t3 >> 16) & 0xff] ^ AES_Td2[(t2 >> 8) & 0xff] ^ AES_Td3[t1 & 0xff] ^ rk[40];
|
||||
s1 = AES_Td0[t1 >> 24] ^ AES_Td1[(t0 >> 16) & 0xff] ^ AES_Td2[(t3 >> 8) & 0xff] ^ AES_Td3[t2 & 0xff] ^ rk[41];
|
||||
s2 = AES_Td0[t2 >> 24] ^ AES_Td1[(t1 >> 16) & 0xff] ^ AES_Td2[(t0 >> 8) & 0xff] ^ AES_Td3[t3 & 0xff] ^ rk[42];
|
||||
s3 = AES_Td0[t3 >> 24] ^ AES_Td1[(t2 >> 16) & 0xff] ^ AES_Td2[(t1 >> 8) & 0xff] ^ AES_Td3[t0 & 0xff] ^ rk[43];
|
||||
/* round 11: */
|
||||
t0 = AES_Td0[s0 >> 24] ^ AES_Td1[(s3 >> 16) & 0xff] ^ AES_Td2[(s2 >> 8) & 0xff] ^ AES_Td3[s1 & 0xff] ^ rk[44];
|
||||
t1 = AES_Td0[s1 >> 24] ^ AES_Td1[(s0 >> 16) & 0xff] ^ AES_Td2[(s3 >> 8) & 0xff] ^ AES_Td3[s2 & 0xff] ^ rk[45];
|
||||
t2 = AES_Td0[s2 >> 24] ^ AES_Td1[(s1 >> 16) & 0xff] ^ AES_Td2[(s0 >> 8) & 0xff] ^ AES_Td3[s3 & 0xff] ^ rk[46];
|
||||
t3 = AES_Td0[s3 >> 24] ^ AES_Td1[(s2 >> 16) & 0xff] ^ AES_Td2[(s1 >> 8) & 0xff] ^ AES_Td3[s0 & 0xff] ^ rk[47];
|
||||
if (key->rounds > 12) {
|
||||
/* round 12: */
|
||||
s0 = AES_Td0[t0 >> 24] ^ AES_Td1[(t3 >> 16) & 0xff] ^ AES_Td2[(t2 >> 8) & 0xff] ^ AES_Td3[t1 & 0xff] ^ rk[48];
|
||||
s1 = AES_Td0[t1 >> 24] ^ AES_Td1[(t0 >> 16) & 0xff] ^ AES_Td2[(t3 >> 8) & 0xff] ^ AES_Td3[t2 & 0xff] ^ rk[49];
|
||||
s2 = AES_Td0[t2 >> 24] ^ AES_Td1[(t1 >> 16) & 0xff] ^ AES_Td2[(t0 >> 8) & 0xff] ^ AES_Td3[t3 & 0xff] ^ rk[50];
|
||||
s3 = AES_Td0[t3 >> 24] ^ AES_Td1[(t2 >> 16) & 0xff] ^ AES_Td2[(t1 >> 8) & 0xff] ^ AES_Td3[t0 & 0xff] ^ rk[51];
|
||||
/* round 13: */
|
||||
t0 = AES_Td0[s0 >> 24] ^ AES_Td1[(s3 >> 16) & 0xff] ^ AES_Td2[(s2 >> 8) & 0xff] ^ AES_Td3[s1 & 0xff] ^ rk[52];
|
||||
t1 = AES_Td0[s1 >> 24] ^ AES_Td1[(s0 >> 16) & 0xff] ^ AES_Td2[(s3 >> 8) & 0xff] ^ AES_Td3[s2 & 0xff] ^ rk[53];
|
||||
t2 = AES_Td0[s2 >> 24] ^ AES_Td1[(s1 >> 16) & 0xff] ^ AES_Td2[(s0 >> 8) & 0xff] ^ AES_Td3[s3 & 0xff] ^ rk[54];
|
||||
t3 = AES_Td0[s3 >> 24] ^ AES_Td1[(s2 >> 16) & 0xff] ^ AES_Td2[(s1 >> 8) & 0xff] ^ AES_Td3[s0 & 0xff] ^ rk[55];
|
||||
}
|
||||
}
|
||||
rk += key->rounds << 2;
|
||||
#else /* !FULL_UNROLL */
|
||||
/*
|
||||
* Nr - 1 full rounds:
|
||||
*/
|
||||
r = key->rounds >> 1;
|
||||
for (;;) {
|
||||
t0 =
|
||||
AES_Td0[(s0 >> 24) ] ^
|
||||
AES_Td1[(s3 >> 16) & 0xff] ^
|
||||
AES_Td2[(s2 >> 8) & 0xff] ^
|
||||
AES_Td3[(s1 ) & 0xff] ^
|
||||
rk[4];
|
||||
t1 =
|
||||
AES_Td0[(s1 >> 24) ] ^
|
||||
AES_Td1[(s0 >> 16) & 0xff] ^
|
||||
AES_Td2[(s3 >> 8) & 0xff] ^
|
||||
AES_Td3[(s2 ) & 0xff] ^
|
||||
rk[5];
|
||||
t2 =
|
||||
AES_Td0[(s2 >> 24) ] ^
|
||||
AES_Td1[(s1 >> 16) & 0xff] ^
|
||||
AES_Td2[(s0 >> 8) & 0xff] ^
|
||||
AES_Td3[(s3 ) & 0xff] ^
|
||||
rk[6];
|
||||
t3 =
|
||||
AES_Td0[(s3 >> 24) ] ^
|
||||
AES_Td1[(s2 >> 16) & 0xff] ^
|
||||
AES_Td2[(s1 >> 8) & 0xff] ^
|
||||
AES_Td3[(s0 ) & 0xff] ^
|
||||
rk[7];
|
||||
|
||||
rk += 8;
|
||||
if (--r == 0) {
|
||||
break;
|
||||
}
|
||||
|
||||
s0 =
|
||||
AES_Td0[(t0 >> 24) ] ^
|
||||
AES_Td1[(t3 >> 16) & 0xff] ^
|
||||
AES_Td2[(t2 >> 8) & 0xff] ^
|
||||
AES_Td3[(t1 ) & 0xff] ^
|
||||
rk[0];
|
||||
s1 =
|
||||
AES_Td0[(t1 >> 24) ] ^
|
||||
AES_Td1[(t0 >> 16) & 0xff] ^
|
||||
AES_Td2[(t3 >> 8) & 0xff] ^
|
||||
AES_Td3[(t2 ) & 0xff] ^
|
||||
rk[1];
|
||||
s2 =
|
||||
AES_Td0[(t2 >> 24) ] ^
|
||||
AES_Td1[(t1 >> 16) & 0xff] ^
|
||||
AES_Td2[(t0 >> 8) & 0xff] ^
|
||||
AES_Td3[(t3 ) & 0xff] ^
|
||||
rk[2];
|
||||
s3 =
|
||||
AES_Td0[(t3 >> 24) ] ^
|
||||
AES_Td1[(t2 >> 16) & 0xff] ^
|
||||
AES_Td2[(t1 >> 8) & 0xff] ^
|
||||
AES_Td3[(t0 ) & 0xff] ^
|
||||
rk[3];
|
||||
}
|
||||
#endif /* ?FULL_UNROLL */
|
||||
/*
|
||||
* apply last round and
|
||||
* map cipher state to byte array block:
|
||||
*/
|
||||
s0 =
|
||||
(AES_Td4[(t0 >> 24) ] & 0xff000000) ^
|
||||
(AES_Td4[(t3 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AES_Td4[(t2 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AES_Td4[(t1 ) & 0xff] & 0x000000ff) ^
|
||||
rk[0];
|
||||
PUTU32(out , s0);
|
||||
s1 =
|
||||
(AES_Td4[(t1 >> 24) ] & 0xff000000) ^
|
||||
(AES_Td4[(t0 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AES_Td4[(t3 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AES_Td4[(t2 ) & 0xff] & 0x000000ff) ^
|
||||
rk[1];
|
||||
PUTU32(out + 4, s1);
|
||||
s2 =
|
||||
(AES_Td4[(t2 >> 24) ] & 0xff000000) ^
|
||||
(AES_Td4[(t1 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AES_Td4[(t0 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AES_Td4[(t3 ) & 0xff] & 0x000000ff) ^
|
||||
rk[2];
|
||||
PUTU32(out + 8, s2);
|
||||
s3 =
|
||||
(AES_Td4[(t3 >> 24) ] & 0xff000000) ^
|
||||
(AES_Td4[(t2 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AES_Td4[(t1 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AES_Td4[(t0 ) & 0xff] & 0x000000ff) ^
|
||||
rk[3];
|
||||
PUTU32(out + 12, s3);
|
||||
}
|
||||
|
||||
#endif /* AES_ASM */
|
||||
|
||||
void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
|
||||
const unsigned long length, const AES_KEY *key,
|
||||
unsigned char *ivec, const int enc)
|
||||
{
|
||||
|
||||
unsigned long n;
|
||||
unsigned long len = length;
|
||||
unsigned char tmp[AES_BLOCK_SIZE];
|
||||
|
||||
assert(in && out && key && ivec);
|
||||
|
||||
if (enc) {
|
||||
while (len >= AES_BLOCK_SIZE) {
|
||||
for(n=0; n < AES_BLOCK_SIZE; ++n)
|
||||
tmp[n] = in[n] ^ ivec[n];
|
||||
AES_encrypt(tmp, out, key);
|
||||
memcpy(ivec, out, AES_BLOCK_SIZE);
|
||||
len -= AES_BLOCK_SIZE;
|
||||
in += AES_BLOCK_SIZE;
|
||||
out += AES_BLOCK_SIZE;
|
||||
}
|
||||
if (len) {
|
||||
for(n=0; n < len; ++n)
|
||||
tmp[n] = in[n] ^ ivec[n];
|
||||
for(n=len; n < AES_BLOCK_SIZE; ++n)
|
||||
tmp[n] = ivec[n];
|
||||
AES_encrypt(tmp, tmp, key);
|
||||
memcpy(out, tmp, AES_BLOCK_SIZE);
|
||||
memcpy(ivec, tmp, AES_BLOCK_SIZE);
|
||||
}
|
||||
} else {
|
||||
while (len >= AES_BLOCK_SIZE) {
|
||||
memcpy(tmp, in, AES_BLOCK_SIZE);
|
||||
AES_decrypt(in, out, key);
|
||||
for(n=0; n < AES_BLOCK_SIZE; ++n)
|
||||
out[n] ^= ivec[n];
|
||||
memcpy(ivec, tmp, AES_BLOCK_SIZE);
|
||||
len -= AES_BLOCK_SIZE;
|
||||
in += AES_BLOCK_SIZE;
|
||||
out += AES_BLOCK_SIZE;
|
||||
}
|
||||
if (len) {
|
||||
memcpy(tmp, in, AES_BLOCK_SIZE);
|
||||
AES_decrypt(tmp, tmp, key);
|
||||
for(n=0; n < len; ++n)
|
||||
out[n] = tmp[n] ^ ivec[n];
|
||||
memcpy(ivec, tmp, AES_BLOCK_SIZE);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user