--- /dev/null
+/* rijndael-alg-ref.c v2.0 August '99
+ * Reference ANSI C code
+ * authors: Paulo Barreto
+ * Vincent Rijmen, K.U.Leuven
+ *
+ * This code is placed in the public domain.
+ */
+
+#include "mvOs.h"
+
+#include "mvAesAlg.h"
+
+#include "mvAesBoxes.dat"
+
+
+MV_U8 mul1(MV_U8 aa, MV_U8 bb);
+void KeyAddition(MV_U8 a[4][MAXBC], MV_U8 rk[4][MAXBC], MV_U8 BC);
+void ShiftRow128Enc(MV_U8 a[4][MAXBC]);
+void ShiftRow128Dec(MV_U8 a[4][MAXBC]);
+void Substitution(MV_U8 a[4][MAXBC], MV_U8 box[256]);
+void MixColumn(MV_U8 a[4][MAXBC], MV_U8 rk[4][MAXBC]);
+void InvMixColumn(MV_U8 a[4][MAXBC]);
+
+
+#define mul(aa, bb) (mask[bb] & Alogtable[aa + Logtable[bb]])
+
+MV_U8 mul1(MV_U8 aa, MV_U8 bb)
+{
+ return mask[bb] & Alogtable[aa + Logtable[bb]];
+}
+
+
+void KeyAddition(MV_U8 a[4][MAXBC], MV_U8 rk[4][MAXBC], MV_U8 BC)
+{
+ /* Exor corresponding text input and round key input bytes
+ */
+ ((MV_U32*)(&(a[0][0])))[0] ^= ((MV_U32*)(&(rk[0][0])))[0];
+ ((MV_U32*)(&(a[1][0])))[0] ^= ((MV_U32*)(&(rk[1][0])))[0];
+ ((MV_U32*)(&(a[2][0])))[0] ^= ((MV_U32*)(&(rk[2][0])))[0];
+ ((MV_U32*)(&(a[3][0])))[0] ^= ((MV_U32*)(&(rk[3][0])))[0];
+
+}
+
+void ShiftRow128Enc(MV_U8 a[4][MAXBC]) {
+ /* Row 0 remains unchanged
+ * The other three rows are shifted a variable amount
+ */
+ MV_U8 tmp[MAXBC];
+
+ tmp[0] = a[1][1];
+ tmp[1] = a[1][2];
+ tmp[2] = a[1][3];
+ tmp[3] = a[1][0];
+
+ ((MV_U32*)(&(a[1][0])))[0] = ((MV_U32*)(&(tmp[0])))[0];
+ /*
+ a[1][0] = tmp[0];
+ a[1][1] = tmp[1];
+ a[1][2] = tmp[2];
+ a[1][3] = tmp[3];
+ */
+ tmp[0] = a[2][2];
+ tmp[1] = a[2][3];
+ tmp[2] = a[2][0];
+ tmp[3] = a[2][1];
+
+ ((MV_U32*)(&(a[2][0])))[0] = ((MV_U32*)(&(tmp[0])))[0];
+ /*
+ a[2][0] = tmp[0];
+ a[2][1] = tmp[1];
+ a[2][2] = tmp[2];
+ a[2][3] = tmp[3];
+ */
+ tmp[0] = a[3][3];
+ tmp[1] = a[3][0];
+ tmp[2] = a[3][1];
+ tmp[3] = a[3][2];
+
+ ((MV_U32*)(&(a[3][0])))[0] = ((MV_U32*)(&(tmp[0])))[0];
+ /*
+ a[3][0] = tmp[0];
+ a[3][1] = tmp[1];
+ a[3][2] = tmp[2];
+ a[3][3] = tmp[3];
+ */
+}
+
+void ShiftRow128Dec(MV_U8 a[4][MAXBC]) {
+ /* Row 0 remains unchanged
+ * The other three rows are shifted a variable amount
+ */
+ MV_U8 tmp[MAXBC];
+
+ tmp[0] = a[1][3];
+ tmp[1] = a[1][0];
+ tmp[2] = a[1][1];
+ tmp[3] = a[1][2];
+
+ ((MV_U32*)(&(a[1][0])))[0] = ((MV_U32*)(&(tmp[0])))[0];
+ /*
+ a[1][0] = tmp[0];
+ a[1][1] = tmp[1];
+ a[1][2] = tmp[2];
+ a[1][3] = tmp[3];
+ */
+
+ tmp[0] = a[2][2];
+ tmp[1] = a[2][3];
+ tmp[2] = a[2][0];
+ tmp[3] = a[2][1];
+
+ ((MV_U32*)(&(a[2][0])))[0] = ((MV_U32*)(&(tmp[0])))[0];
+ /*
+ a[2][0] = tmp[0];
+ a[2][1] = tmp[1];
+ a[2][2] = tmp[2];
+ a[2][3] = tmp[3];
+ */
+
+ tmp[0] = a[3][1];
+ tmp[1] = a[3][2];
+ tmp[2] = a[3][3];
+ tmp[3] = a[3][0];
+
+ ((MV_U32*)(&(a[3][0])))[0] = ((MV_U32*)(&(tmp[0])))[0];
+ /*
+ a[3][0] = tmp[0];
+ a[3][1] = tmp[1];
+ a[3][2] = tmp[2];
+ a[3][3] = tmp[3];
+ */
+}
+
+void Substitution(MV_U8 a[4][MAXBC], MV_U8 box[256]) {
+ /* Replace every byte of the input by the byte at that place
+ * in the nonlinear S-box
+ */
+ int i, j;
+
+ for(i = 0; i < 4; i++)
+ for(j = 0; j < 4; j++) a[i][j] = box[a[i][j]] ;
+}
+
+void MixColumn(MV_U8 a[4][MAXBC], MV_U8 rk[4][MAXBC]) {
+ /* Mix the four bytes of every column in a linear way
+ */
+ MV_U8 b[4][MAXBC];
+ int i, j;
+
+ for(j = 0; j < 4; j++){
+ b[0][j] = mul(25,a[0][j]) ^ mul(1,a[1][j]) ^ a[2][j] ^ a[3][j];
+ b[1][j] = mul(25,a[1][j]) ^ mul(1,a[2][j]) ^ a[3][j] ^ a[0][j];
+ b[2][j] = mul(25,a[2][j]) ^ mul(1,a[3][j]) ^ a[0][j] ^ a[1][j];
+ b[3][j] = mul(25,a[3][j]) ^ mul(1,a[0][j]) ^ a[1][j] ^ a[2][j];
+ }
+ for(i = 0; i < 4; i++)
+ /*for(j = 0; j < BC; j++) a[i][j] = b[i][j];*/
+ ((MV_U32*)(&(a[i][0])))[0] = ((MV_U32*)(&(b[i][0])))[0] ^ ((MV_U32*)(&(rk[i][0])))[0];;
+}
+
+void InvMixColumn(MV_U8 a[4][MAXBC]) {
+ /* Mix the four bytes of every column in a linear way
+ * This is the opposite operation of Mixcolumn
+ */
+ MV_U8 b[4][MAXBC];
+ int i, j;
+
+ for(j = 0; j < 4; j++){
+ b[0][j] = mul(223,a[0][j]) ^ mul(104,a[1][j]) ^ mul(238,a[2][j]) ^ mul(199,a[3][j]);
+ b[1][j] = mul(223,a[1][j]) ^ mul(104,a[2][j]) ^ mul(238,a[3][j]) ^ mul(199,a[0][j]);
+ b[2][j] = mul(223,a[2][j]) ^ mul(104,a[3][j]) ^ mul(238,a[0][j]) ^ mul(199,a[1][j]);
+ b[3][j] = mul(223,a[3][j]) ^ mul(104,a[0][j]) ^ mul(238,a[1][j]) ^ mul(199,a[2][j]);
+ }
+ for(i = 0; i < 4; i++)
+ /*for(j = 0; j < BC; j++) a[i][j] = b[i][j];*/
+ ((MV_U32*)(&(a[i][0])))[0] = ((MV_U32*)(&(b[i][0])))[0];
+}
+
+int rijndaelKeySched (MV_U8 k[4][MAXKC], int keyBits, int blockBits, MV_U8 W[MAXROUNDS+1][4][MAXBC])
+{
+ /* Calculate the necessary round keys
+ * The number of calculations depends on keyBits and blockBits
+ */
+ int KC, BC, ROUNDS;
+ int i, j, t, rconpointer = 0;
+ MV_U8 tk[4][MAXKC];
+
+ switch (keyBits) {
+ case 128: KC = 4; break;
+ case 192: KC = 6; break;
+ case 256: KC = 8; break;
+ default : return (-1);
+ }
+
+ switch (blockBits) {
+ case 128: BC = 4; break;
+ case 192: BC = 6; break;
+ case 256: BC = 8; break;
+ default : return (-2);
+ }
+
+ switch (keyBits >= blockBits ? keyBits : blockBits) {
+ case 128: ROUNDS = 10; break;
+ case 192: ROUNDS = 12; break;
+ case 256: ROUNDS = 14; break;
+ default : return (-3); /* this cannot happen */
+ }
+
+
+ for(j = 0; j < KC; j++)
+ for(i = 0; i < 4; i++)
+ tk[i][j] = k[i][j];
+ t = 0;
+ /* copy values into round key array */
+ for(j = 0; (j < KC) && (t < (ROUNDS+1)*BC); j++, t++)
+ for(i = 0; i < 4; i++) W[t / BC][i][t % BC] = tk[i][j];
+
+ while (t < (ROUNDS+1)*BC) { /* while not enough round key material calculated */
+ /* calculate new values */
+ for(i = 0; i < 4; i++)
+ tk[i][0] ^= S[tk[(i+1)%4][KC-1]];
+ tk[0][0] ^= rcon[rconpointer++];
+
+ if (KC != 8)
+ for(j = 1; j < KC; j++)
+ for(i = 0; i < 4; i++) tk[i][j] ^= tk[i][j-1];
+ else {
+ for(j = 1; j < KC/2; j++)
+ for(i = 0; i < 4; i++) tk[i][j] ^= tk[i][j-1];
+ for(i = 0; i < 4; i++) tk[i][KC/2] ^= S[tk[i][KC/2 - 1]];
+ for(j = KC/2 + 1; j < KC; j++)
+ for(i = 0; i < 4; i++) tk[i][j] ^= tk[i][j-1];
+ }
+ /* copy values into round key array */
+ for(j = 0; (j < KC) && (t < (ROUNDS+1)*BC); j++, t++)
+ for(i = 0; i < 4; i++) W[t / BC][i][t % BC] = tk[i][j];
+ }
+
+ return 0;
+}
+
+
+
+int rijndaelEncrypt128(MV_U8 a[4][MAXBC], MV_U8 rk[MAXROUNDS+1][4][MAXBC], int rounds)
+{
+ /* Encryption of one block.
+ */
+ int r, BC, ROUNDS;
+
+ BC = 4;
+ ROUNDS = rounds;
+
+ /* begin with a key addition
+ */
+
+ KeyAddition(a,rk[0],BC);
+
+ /* ROUNDS-1 ordinary rounds
+ */
+ for(r = 1; r < ROUNDS; r++) {
+ Substitution(a,S);
+ ShiftRow128Enc(a);
+ MixColumn(a, rk[r]);
+ /*KeyAddition(a,rk[r],BC);*/
+ }
+
+ /* Last round is special: there is no MixColumn
+ */
+ Substitution(a,S);
+ ShiftRow128Enc(a);
+ KeyAddition(a,rk[ROUNDS],BC);
+
+ return 0;
+}
+
+
+int rijndaelDecrypt128(MV_U8 a[4][MAXBC], MV_U8 rk[MAXROUNDS+1][4][MAXBC], int rounds)
+{
+ int r, BC, ROUNDS;
+
+ BC = 4;
+ ROUNDS = rounds;
+
+ /* To decrypt: apply the inverse operations of the encrypt routine,
+ * in opposite order
+ *
+ * (KeyAddition is an involution: it 's equal to its inverse)
+ * (the inverse of Substitution with table S is Substitution with the inverse table of S)
+ * (the inverse of Shiftrow is Shiftrow over a suitable distance)
+ */
+
+ /* First the special round:
+ * without InvMixColumn
+ * with extra KeyAddition
+ */
+ KeyAddition(a,rk[ROUNDS],BC);
+ ShiftRow128Dec(a);
+ Substitution(a,Si);
+
+ /* ROUNDS-1 ordinary rounds
+ */
+ for(r = ROUNDS-1; r > 0; r--) {
+ KeyAddition(a,rk[r],BC);
+ InvMixColumn(a);
+ ShiftRow128Dec(a);
+ Substitution(a,Si);
+
+ }
+
+ /* End with the extra key addition
+ */
+
+ KeyAddition(a,rk[0],BC);
+
+ return 0;
+}
+
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