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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
//#include <openssl/sha.h>
#include <openssl/rsa.h>
#include "onion_base32.h"
#include "trampoline.h"
//#include "sha1.h"
/* FIXME make loop internal to run(), rather than rebuilding kernel etc
* each new key */
int run(const char *preferred_platform, unsigned char *search_raw, size_t raw_len, struct sha_data *sha)
{
fprintf(stderr, "Building CL trampoline... ");
if (tramp_init(preferred_platform)) {
fprintf(stderr, "Failed.\n");
return 1;
}
fprintf(stderr, "Done.\n");
fprintf(stderr, "Loading kernel source from file... ");
if (tramp_load_kernel(CL_SRC_DIR"onion.cl")) {
fprintf(stderr, "Failed.\n");
return 1;
}
fprintf(stderr, "Loaded.\n");
fprintf(stderr, "Compiling kernel source... ");
if (tramp_compile_kernel()) {
fprintf(stderr, "Failed:\n%s\n", tramp_get_build_log());
return 1;
}
fprintf(stderr, "Compiled.\n");
fprintf(stderr, "Setting kernel arguments... ");
if (tramp_set_kernel_args(raw_len)) {
fprintf(stderr, "Failed.\n");
return 1;
}
fprintf(stderr, "Done.\n");
fprintf(stderr, "Transferring search target to device... ");
if (tramp_copy_search(search_raw)) {
fprintf(stderr, "Failed.\n");
return 1;
}
fprintf(stderr, "Done.\n");
fprintf(stderr, "Transferring partial SHA work to device... ");
if (tramp_copy_sha(sha)) {
fprintf(stderr, "Failed.\n");
return 1;
}
fprintf(stderr, "Done.\n");
fprintf(stderr, "Running kernel... ");
if (tramp_run_kernel()) {
fprintf(stderr, "Failed.\n");
return 1;
}
fprintf(stderr, "Done.\n");
/* char *buffer = malloc(size*size);
if (!buffer) {
perror("host data buffer malloc");
return 1;
}
fprintf(stderr, "Reading data from device... ");
if (tramp_copy_data((void*)&buffer, size*size)) {
fprintf(stderr, "Failed.\n");
return 1;
}
fprintf(stderr, "Done.\n");
*/
fprintf(stderr, "Destroying CL trampoline... ");
tramp_destroy();
fprintf(stderr, "Blown to smitherines.\n");
/* free(buffer);*/
return 0;
}
void die_help(char *argv0)
{
fprintf(stderr, "Syntax:\n%s [-p platform] [-s search]\n", argv0);
exit(1);
}
int main(int argc, char **argv)
{
const char *search = 0;
char *preferred_platform = NULL;
char c = '\0';
while ((c = getopt(argc, argv, "s:p:")) != -1) {
switch (c) {
case 's':
search = optarg;
break;
case 'p':
preferred_platform = optarg;
break;
case '?':
die_help(argv[0]);
return 1; /* mostly unreachable */
break; /* unreachable */
}
}
/* FIXME sanatise the input search for non-base32 chars
* Also investigate performance benefit from pre-unbase32-ing it
* like the CPU-bound version does */
unsigned char search_raw[10];
/* padded array of the human-readable search */
char search_pad[16] = {0};
strncpy(search_pad, search, sizeof(search_pad));
/* decode desired base32 */
onion_base32_dec(search_raw, search_pad);
/* hangover code from sand-leek.c */
/* bitmasks to be used to compare remainder bits */
unsigned char bitmasks[] = {
[1] = 0xF8, /* 5 MSB */
[2] = 0xC0, /* 2 MSB */
[3] = 0xFE, /* 7 MSB */
[4] = 0xF0, /* 4 MSB */
[5] = 0x80, /* 1 MSB */
[6] = 0xFC, /* 6 MSB */
[7] = 0xE0 /* 3 MSB */
};
/* number of whole bytes of raw hash to compare:
* 10 is the size of the data a full onion address covers
* 16 is the size of the base32-encoded onion address */
size_t search_len = strlen(search);
int raw_len = (search_len*10)/16;
int bitmask = bitmasks[search_len % 8];
/* end hangover code from sand-leek.c */
RSA* rsa_key = NULL;
rsa_key = RSA_new();
if (!rsa_key) {
fprintf(stderr, "Failed to allocate RSA key\n");
return 1;
}
#define EXPONENT_SIZE_BYTES 4
#define EXPONENT_MIN 0x1FFFFFFF
#define RSA_KEY_BITS 1024
unsigned long e = EXPONENT_MIN;
unsigned char *der_data = NULL;
unsigned char *tmp_data = NULL;
int der_length = 0;
struct sha_data sha_c;
BIGNUM *bignum_e = NULL;
bignum_e = BN_new();
if (!bignum_e) {
fprintf(stderr, "Failed to allocate bignum for exponent\n");
return 1;
}
e = EXPONENT_MIN;
BN_set_word(bignum_e, e);
if (!RSA_generate_key_ex(rsa_key, RSA_KEY_BITS, bignum_e, NULL)) {
fprintf(stderr, "Failed to generate RSA key\n");
return 1;
}
der_length = i2d_RSAPublicKey(rsa_key, NULL);
if (der_length <= 0) {
fprintf(stderr, "i2d failed\n");
return 1;
}
der_data = malloc(der_length);
if (!der_data) {
fprintf(stderr, "DER data malloc failed\n");
return 1;
}
tmp_data = der_data;
if (i2d_RSAPublicKey(rsa_key, &tmp_data) != der_length) {
fprintf(stderr, "DER formatting failed\n");
return 1;
}
sha_init(&sha_c);
sha_update(&sha_c, der_data, der_length - EXPONENT_SIZE_BYTES);
free(der_data);
run(preferred_platform, search_raw, raw_len, &sha_c);
return 0;
}
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