void bench_camellia(void)
{
Camellia cam;
double start, total, persec;
int i, ret;
ret = CamelliaSetKey(&cam, key, 16, iv);
if (ret != 0) {
printf("CamelliaSetKey failed, ret = %d\n", ret);
return;
}
start = current_time(1);
for(i = 0; i < numBlocks; i++)
CamelliaCbcEncrypt(&cam, plain, cipher, sizeof(plain));
total = current_time(0) - start;
persec = 1 / total * numBlocks;
#ifdef BENCH_EMBEDDED
/* since using kB, convert to MB/s */
persec = persec / 1024;
#endif
printf("Camellia %d %s took %5.3f seconds, %7.3f MB/s\n", numBlocks,
blockType, total, persec);
}
/*
* Encrypts a file using Camellia
*/
int CamelliaEncrypt(Camellia* cam, byte* key, int size, FILE* inFile,
FILE* outFile)
{
RNG rng;
byte iv[CAMELLIA_BLOCK_SIZE];
byte* input;
byte* output;
byte salt[SALT_SIZE] = {0};
int i = 0;
int ret = 0;
int inputLength;
int length;
int padCounter = 0;
fseek(inFile, 0, SEEK_END);
inputLength = ftell(inFile);
fseek(inFile, 0, SEEK_SET);
length = inputLength;
/* pads the length until it evenly matches a block / increases pad number*/
while (length % CAMELLIA_BLOCK_SIZE != 0) {
length++;
padCounter++;
}
input = malloc(length);
output = malloc(length);
ret = InitRng(&rng);
if (ret != 0) {
printf("Failed to initialize random number generator\n");
return -1030;
}
/* reads from inFile and wrties whatever is there to the input array */
ret = fread(input, 1, inputLength, inFile);
if (ret == 0) {
printf("Input file does not exist.\n");
return -1010;
}
for (i = inputLength; i < length; i++) {
/* padds the added characters with the number of pads */
input[i] = padCounter;
}
ret = RNG_GenerateBlock(&rng, iv, CAMELLIA_BLOCK_SIZE);
if (ret != 0)
return -1020;
/* stretches key to fit size */
ret = GenerateKey(&rng, key, size, salt, padCounter);
if (ret != 0)
return -1040;
/* sets key */
ret = CamelliaSetKey(cam, key, CAMELLIA_BLOCK_SIZE, iv);
if (ret != 0)
return -1001;
/* encrypts the message to the ouput based on input length + padding */
CamelliaCbcEncrypt(cam, output, input, length);
/* writes to outFile */
fwrite(salt, 1, SALT_SIZE, outFile);
fwrite(iv, 1, CAMELLIA_BLOCK_SIZE, outFile);
fwrite(output, 1, length, outFile);
/* closes the opened files and frees the memory*/
memset(input, 0, length);
memset(output, 0, length);
memset(key, 0, size);
free(input);
free(output);
free(key);
fclose(inFile);
fclose(outFile);
return 0;
}
/*
* Decrypts a file using Camellia
*/
int CamelliaDecrypt(Camellia* cam, byte* key, int size, FILE* inFile,
FILE* outFile)
{
RNG rng;
byte iv[CAMELLIA_BLOCK_SIZE];
byte* input;
byte* output;
byte salt[SALT_SIZE] = {0};
int i = 0;
int ret = 0;
int length;
int aSize;
fseek(inFile, 0, SEEK_END);
length = ftell(inFile);
fseek(inFile, 0, SEEK_SET);
aSize = length;
input = malloc(aSize);
output = malloc(aSize);
InitRng(&rng);
/* reads from inFile and wrties whatever is there to the input array */
ret = fread(input, 1, length, inFile);
if (ret == 0) {
printf("Input file does not exist.\n");
return -1010;
}
for (i = 0; i < SALT_SIZE; i++) {
/* finds salt from input message */
salt[i] = input[i];
}
for (i = SALT_SIZE; i < CAMELLIA_BLOCK_SIZE + SALT_SIZE; i++) {
/* finds iv from input message */
iv[i - SALT_SIZE] = input[i];
}
/* replicates old key if keys match */
ret = PBKDF2(key, key, strlen((const char*)key), salt, SALT_SIZE, 4096,
size, SHA256);
if (ret != 0)
return -1050;
/* sets key */
ret = CamelliaSetKey(cam, key, CAMELLIA_BLOCK_SIZE, iv);
if (ret != 0)
return -1002;
/* change length to remove salt/iv block from being decrypted */
length -= (CAMELLIA_BLOCK_SIZE + SALT_SIZE);
for (i = 0; i < length; i++) {
/* shifts message: ignores salt/iv on message*/
input[i] = input[i + (CAMELLIA_BLOCK_SIZE + SALT_SIZE)];
}
/* decrypts the message to output based on input length + padding */
CamelliaCbcDecrypt(cam, output, input, length);
if (salt[0] != 0) {
/* reduces length based on number of padded elements */
length -= output[length-1];
}
/* writes output to the outFile based on shortened length */
fwrite(output, 1, length, outFile);
/* closes the opened files and frees the memory*/
memset(input, 0, aSize);
memset(output, 0, aSize);
memset(key, 0, size);
free(input);
free(output);
free(key);
fclose(inFile);
fclose(outFile);
return 0;
}
