--- /dev/null
+/* rijndael-api-ref.c v2.1 April 2000
+ * Reference ANSI C code
+ * authors: v2.0 Paulo Barreto
+ * Vincent Rijmen, K.U.Leuven
+ * v2.1 Vincent Rijmen, K.U.Leuven
+ *
+ * This code is placed in the public domain.
+ */
+#include "mvOs.h"
+
+#include "mvAes.h"
+#include "mvAesAlg.h"
+
+
+/* Defines:
+ Add any additional defines you need
+*/
+
+#define MODE_ECB 1 /* Are we ciphering in ECB mode? */
+#define MODE_CBC 2 /* Are we ciphering in CBC mode? */
+#define MODE_CFB1 3 /* Are we ciphering in 1-bit CFB mode? */
+
+
+int aesMakeKey(MV_U8 *expandedKey, MV_U8 *keyMaterial, int keyLen, int blockLen)
+{
+ MV_U8 W[MAXROUNDS+1][4][MAXBC];
+ MV_U8 k[4][MAXKC];
+ MV_U8 j;
+ int i, rounds, KC;
+
+ if (expandedKey == NULL)
+ {
+ return AES_BAD_KEY_INSTANCE;
+ }
+
+ if (!((keyLen == 128) || (keyLen == 192) || (keyLen == 256)))
+ {
+ return AES_BAD_KEY_MAT;
+ }
+
+ if (keyMaterial == NULL)
+ {
+ return AES_BAD_KEY_MAT;
+ }
+
+ /* initialize key schedule: */
+ for(i=0; i<keyLen/8; i++)
+ {
+ j = keyMaterial[i];
+ k[i % 4][i / 4] = j;
+ }
+
+ rijndaelKeySched (k, keyLen, blockLen, W);
+#ifdef MV_AES_DEBUG
+ {
+ MV_U8* pW = &W[0][0][0];
+ int x;
+
+ mvOsPrintf("Expended Key: size = %d\n", sizeof(W));
+ for(i=0; i<sizeof(W); i++)
+ {
+ mvOsPrintf("%02x ", pW[i]);
+ }
+ for(i=0; i<MAXROUNDS+1; i++)
+ {
+ mvOsPrintf("\n Round #%02d: ", i);
+ for(x=0; x<MAXBC; x++)
+ {
+ mvOsPrintf("%02x%02x%02x%02x ",
+ W[i][0][x], W[i][1][x], W[i][2][x], W[i][3][x]);
+ }
+ mvOsPrintf("\n");
+ }
+ }
+#endif /* MV_AES_DEBUG */
+ switch (keyLen)
+ {
+ case 128:
+ rounds = 10;
+ KC = 4;
+ break;
+ case 192:
+ rounds = 12;
+ KC = 6;
+ break;
+ case 256:
+ rounds = 14;
+ KC = 8;
+ break;
+ default :
+ return (-1);
+ }
+
+ for(i=0; i<MAXBC; i++)
+ {
+ for(j=0; j<4; j++)
+ {
+ expandedKey[i*4+j] = W[rounds][j][i];
+ }
+ }
+ for(; i<KC; i++)
+ {
+ for(j=0; j<4; j++)
+ {
+ expandedKey[i*4+j] = W[rounds-1][j][i+MAXBC-KC];
+ }
+ }
+
+
+ return 0;
+}
+
+int aesBlockEncrypt128(MV_U8 mode, MV_U8 *IV, MV_U8 *expandedKey, int keyLen,
+ MV_U32 *plain, int numBlocks, MV_U32 *cipher)
+{
+ int i, j, t;
+ MV_U8 block[4][MAXBC];
+ int rounds;
+ char *input, *outBuffer;
+
+ input = (char*)plain;
+ outBuffer = (char*)cipher;
+
+ /* check parameter consistency: */
+ if( (expandedKey == NULL) || ((keyLen != 128) && (keyLen != 192) && (keyLen != 256)))
+ {
+ return AES_BAD_KEY_MAT;
+ }
+ if ((mode != MODE_ECB && mode != MODE_CBC))
+ {
+ return AES_BAD_CIPHER_STATE;
+ }
+
+ switch (keyLen)
+ {
+ case 128: rounds = 10; break;
+ case 192: rounds = 12; break;
+ case 256: rounds = 14; break;
+ default : return (-3); /* this cannot happen */
+ }
+
+
+ switch (mode)
+ {
+ case MODE_ECB:
+ for (i = 0; i < numBlocks; i++)
+ {
+ for (j = 0; j < 4; j++)
+ {
+ for(t = 0; t < 4; t++)
+ /* parse input stream into rectangular array */
+ block[t][j] = input[16*i+4*j+t] & 0xFF;
+ }
+ rijndaelEncrypt128(block, (MV_U8 (*)[4][MAXBC])expandedKey, rounds);
+ for (j = 0; j < 4; j++)
+ {
+ /* parse rectangular array into output ciphertext bytes */
+ for(t = 0; t < 4; t++)
+ outBuffer[16*i+4*j+t] = (MV_U8) block[t][j];
+
+ }
+ }
+ break;
+
+ case MODE_CBC:
+ for (j = 0; j < 4; j++)
+ {
+ for(t = 0; t < 4; t++)
+ /* parse initial value into rectangular array */
+ block[t][j] = IV[t+4*j] & 0xFF;
+ }
+ for (i = 0; i < numBlocks; i++)
+ {
+ for (j = 0; j < 4; j++)
+ {
+ for(t = 0; t < 4; t++)
+ /* parse input stream into rectangular array and exor with
+ IV or the previous ciphertext */
+ block[t][j] ^= input[16*i+4*j+t] & 0xFF;
+ }
+ rijndaelEncrypt128(block, (MV_U8 (*)[4][MAXBC])expandedKey, rounds);
+ for (j = 0; j < 4; j++)
+ {
+ /* parse rectangular array into output ciphertext bytes */
+ for(t = 0; t < 4; t++)
+ outBuffer[16*i+4*j+t] = (MV_U8) block[t][j];
+ }
+ }
+ break;
+
+ default: return AES_BAD_CIPHER_STATE;
+ }
+
+ return 0;
+}
+
+int aesBlockDecrypt128(MV_U8 mode, MV_U8 *IV, MV_U8 *expandedKey, int keyLen,
+ MV_U32 *srcData, int numBlocks, MV_U32 *dstData)
+{
+ int i, j, t;
+ MV_U8 block[4][MAXBC];
+ MV_U8 iv[4][MAXBC];
+ int rounds;
+ char *input, *outBuffer;
+
+ input = (char*)srcData;
+ outBuffer = (char*)dstData;
+
+ if (expandedKey == NULL)
+ {
+ return AES_BAD_KEY_MAT;
+ }
+
+ /* check parameter consistency: */
+ if (keyLen != 128 && keyLen != 192 && keyLen != 256)
+ {
+ return AES_BAD_KEY_MAT;
+ }
+ if ((mode != MODE_ECB && mode != MODE_CBC))
+ {
+ return AES_BAD_CIPHER_STATE;
+ }
+
+ switch (keyLen)
+ {
+ case 128: rounds = 10; break;
+ case 192: rounds = 12; break;
+ case 256: rounds = 14; break;
+ default : return (-3); /* this cannot happen */
+ }
+
+
+ switch (mode)
+ {
+ case MODE_ECB:
+ for (i = 0; i < numBlocks; i++)
+ {
+ for (j = 0; j < 4; j++)
+ {
+ for(t = 0; t < 4; t++)
+ {
+ /* parse input stream into rectangular array */
+ block[t][j] = input[16*i+4*j+t] & 0xFF;
+ }
+ }
+ rijndaelDecrypt128(block, (MV_U8 (*)[4][MAXBC])expandedKey, rounds);
+ for (j = 0; j < 4; j++)
+ {
+ /* parse rectangular array into output ciphertext bytes */
+ for(t = 0; t < 4; t++)
+ outBuffer[16*i+4*j+t] = (MV_U8) block[t][j];
+ }
+ }
+ break;
+
+ case MODE_CBC:
+ /* first block */
+ for (j = 0; j < 4; j++)
+ {
+ for(t = 0; t < 4; t++)
+ {
+ /* parse input stream into rectangular array */
+ block[t][j] = input[4*j+t] & 0xFF;
+ iv[t][j] = block[t][j];
+ }
+ }
+ rijndaelDecrypt128(block, (MV_U8 (*)[4][MAXBC])expandedKey, rounds);
+
+ for (j = 0; j < 4; j++)
+ {
+ /* exor the IV and parse rectangular array into output ciphertext bytes */
+ for(t = 0; t < 4; t++)
+ {
+ outBuffer[4*j+t] = (MV_U8) (block[t][j] ^ IV[t+4*j]);
+ IV[t+4*j] = iv[t][j];
+ }
+ }
+
+ /* next blocks */
+ for (i = 1; i < numBlocks; i++)
+ {
+ for (j = 0; j < 4; j++)
+ {
+ for(t = 0; t < 4; t++)
+ {
+ /* parse input stream into rectangular array */
+ iv[t][j] = input[16*i+4*j+t] & 0xFF;
+ block[t][j] = iv[t][j];
+ }
+ }
+ rijndaelDecrypt128(block, (MV_U8 (*)[4][MAXBC])expandedKey, rounds);
+
+ for (j = 0; j < 4; j++)
+ {
+ /* exor previous ciphertext block and parse rectangular array
+ into output ciphertext bytes */
+ for(t = 0; t < 4; t++)
+ {
+ outBuffer[16*i+4*j+t] = (MV_U8) (block[t][j] ^ IV[t+4*j]);
+ IV[t+4*j] = iv[t][j];
+ }
+ }
+ }
+ break;
+
+ default: return AES_BAD_CIPHER_STATE;
+ }
+
+ return 0;
+}
+
+
projects / 15.05 / openwrt.git / blobdiff