static int sqlcipher_ltc_activate(void *ctx) {
ltc_ctx *ltc = (ltc_ctx*)ctx;
int random_buffer_sz = 32;
unsigned char random_buffer[random_buffer_sz];
if(ltc_init == 0) {
if(register_prng(&fortuna_desc) != CRYPT_OK) return SQLITE_ERROR;
if(register_cipher(&rijndael_desc) != CRYPT_OK) return SQLITE_ERROR;
if(register_hash(&sha1_desc) != CRYPT_OK) return SQLITE_ERROR;
ltc_init = 1;
}
if(fortuna_start(&(ltc->prng)) != CRYPT_OK) {
return SQLITE_ERROR;
}
sqlite3_randomness(random_buffer_sz, &random_buffer);
if(sqlcipher_ltc_add_random(ctx, random_buffer, random_buffer_sz) != SQLITE_OK) {
return SQLITE_ERROR;
}
if(sqlcipher_ltc_add_random(ctx, <c, sizeof(ltc_ctx*)) != SQLITE_OK) {
return SQLITE_ERROR;
}
if(fortuna_ready(&(ltc->prng)) != CRYPT_OK) {
return SQLITE_ERROR;
}
return SQLITE_OK;
}
//generate 6 different functions and store in memory
void generateRoundFunctions(unsigned char * seed, unsigned int * bufint, int blocks)
{
int err;
int i=0;
int j=0;
unsigned char buf[4];
//bufint = malloc(blocks*sizeof(unsigned int));
int index = 0;
prng_state prng;
if ((err = fortuna_start(&prng)) != CRYPT_OK) {
printf("start error: %s\n", error_to_string(err));
}
if ((err = fortuna_add_entropy(seed, strlen(seed), &prng))!= CRYPT_OK) {
printf("Add entropy error: %s\n", error_to_string(err));
}
if ((err = fortuna_ready(&prng)) != CRYPT_OK) {
printf("Ready error: %s\n", error_to_string(err));
}
for(i=0;i<blocks;i++){
fortuna_read(buf,sizeof(buf),&prng);
bufint[i] = *(unsigned int *)buf;
}
}
static int sqlcipher_ltc_activate(void *ctx) {
unsigned char random_buffer[FORTUNA_MAX_SZ];
#ifndef SQLCIPHER_LTC_NO_MUTEX_RAND
if(ltc_rand_mutex == NULL){
ltc_rand_mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
}
sqlite3_mutex_enter(ltc_rand_mutex);
#endif
sqlcipher_memset(random_buffer, 0, FORTUNA_MAX_SZ);
if(ltc_init == 0) {
if(register_prng(&fortuna_desc) < 0) return SQLITE_ERROR;
if(register_cipher(&rijndael_desc) < 0) return SQLITE_ERROR;
if(register_hash(&sha512_desc) < 0) return SQLITE_ERROR;
if(register_hash(&sha256_desc) < 0) return SQLITE_ERROR;
if(register_hash(&sha1_desc) < 0) return SQLITE_ERROR;
if(fortuna_start(&prng) != CRYPT_OK) {
return SQLITE_ERROR;
}
ltc_init = 1;
}
ltc_ref_count++;
#ifndef SQLCIPHER_TEST
sqlite3_randomness(FORTUNA_MAX_SZ, random_buffer);
#endif
#ifndef SQLCIPHER_LTC_NO_MUTEX_RAND
sqlite3_mutex_leave(ltc_rand_mutex);
#endif
if(sqlcipher_ltc_add_random(ctx, random_buffer, FORTUNA_MAX_SZ) != SQLITE_OK) {
return SQLITE_ERROR;
}
sqlcipher_memset(random_buffer, 0, FORTUNA_MAX_SZ);
return SQLITE_OK;
}
