diff options
Diffstat (limited to 'sand-leek.c')
| -rw-r--r-- | sand-leek.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/sand-leek.c b/sand-leek.c new file mode 100644 index 0000000..b31009f --- /dev/null +++ b/sand-leek.c @@ -0,0 +1,193 @@ +#include <stdio.h> +#include <stdlib.h> +#include <getopt.h> +#include <pthread.h> +#include <semaphore.h> +#include <errno.h> +#include <string.h> +#include <openssl/bn.h> +#include <openssl/rsa.h> +#include <openssl/sha.h> +#include <openssl/pem.h> + +const static char base32_lookup[] = "abcdefghijklmnopqrstuvwxyz234567"; +static char *search; +static int search_len; +sem_t working; + +void +onion_sha(char output[16], unsigned char sum[20]) { + size_t c = 0; + int i = 0; + + for (i = 0; i < 10; i+=5) { + output[c++] = base32_lookup[sum[i] >> 3]; + output[c++] = base32_lookup[((sum[i] & 0x07) << 2) | (sum[i+1] >> 6)]; + output[c++] = base32_lookup[(sum[i+1] >> 1) & 0x1F]; + output[c++] = base32_lookup[((sum[i+1] & 1) << 4) | (sum[i+2] >> 4)]; + output[c++] = base32_lookup[((sum[i+2] & 0x0F) << 1) | ((sum[i+3] & 0x80) >> 7)]; + output[c++] = base32_lookup[(sum[i+3] >> 2) & 0x1F]; + output[c++] = base32_lookup[((sum[i+3] & 0x03) << 3) | (sum[i+4] >> 5)]; + output[c++] = base32_lookup[sum[i+4] & 0x1F]; + } +} + +void* +work(void *arg) { + char b32[17]; + unsigned char sha[20]; + unsigned long e = 3; + unsigned int e_be = 0; + unsigned char *der_data = NULL; + unsigned char *tmp_data = NULL; + size_t der_length = 0; + unsigned long volatile *kilo_hashes = arg; + unsigned long hashes = 0; + // size_t last_der_length = 0; + BIGNUM *be = NULL; + RSA *rsa_key = NULL; + SHA_CTX sha_c; + SHA_CTX working_sha_c; + + rsa_key = RSA_new(); + if (!rsa_key) { + fprintf(stderr, "Failed to allocate RSA key\n"); + goto STOP; + } + + be = BN_new(); + if (!be) { + fprintf(stderr, "Failed to allocate bignum for exponent\n"); + goto STOP; + } + + //last_der_length = -1; + while(1) { + BN_set_word(be, e); + if (!RSA_generate_key_ex(rsa_key, 1024, be, NULL)) { + fprintf(stderr, "Failed to generate RSA key\n"); + goto STOP; + } + der_length = i2d_RSAPublicKey(rsa_key, NULL); + if (der_length <= 0) { + fprintf(stderr, "i2d failed\n"); + goto STOP; + } + der_data = malloc(der_length); + if (!der_data) { + fprintf(stderr, "DER data malloc failed\n"); + goto STOP; + } + tmp_data = der_data; + i2d_RSAPublicKey(rsa_key, &der_data); + free(tmp_data); + + /* core loop adapted from eschalot */ + SHA1_Init(&sha_c); + SHA1_Update(&sha_c, der_data, der_length - 4); + while (e < 0xFFFFFFFF) { + + memcpy(&working_sha_c, &sha_c, 40); /* FIXME magic */ + working_sha_c.num = sha_c.num; + + e_be = htobe32(e); + SHA1_Update(&working_sha_c, &e_be, sizeof(unsigned int)); + SHA1_Final(&sha, &working_sha_c); + + onion_sha(b32, sha); + if (hashes++ >= 1000) { + hashes = 0; + (*kilo_hashes)++; + } + b32[16] = '\0'; + if(strncmp(b32, search, search_len) == 0) { + printf("Found %s.onion\n", b32); + EVP_PKEY *evp_key = EVP_PKEY_new(); + if (!EVP_PKEY_assign_RSA(evp_key, rsa_key)) { + fprintf(stderr, "EVP_PKEY assignment failed\n"); + goto STOP; + } + PEM_write_PrivateKey(stdout, evp_key, NULL, NULL, 0, NULL, NULL); + EVP_PKEY_free(evp_key); + goto STOP; + } + /* select next odd exponent */ + e += 2; + } + printf("Wrap\n"); + } +STOP: + sem_post(&working); + return NULL; +} + +int +main(int argc, char **argv) { + char opt = '\0'; + int thread_count = 1; + int i = 0; + pthread_t *workers = NULL; + unsigned long volatile *khash_count = NULL; + unsigned long khashes = 0; + + while ((opt = getopt(argc, argv, "t:s:")) != -1) { + switch (opt) { + case 't': + thread_count = atoi(optarg); + break; + case 's': + search = optarg; + break; + } + } + + if (thread_count <= 0) { + fprintf(stderr, "thread count must be > 0\n"); + } + + search_len = strlen(search); + + workers = calloc(thread_count, sizeof(pthread_t)); + if (!workers) { + perror("worker thread calloc"); + return 1; + } + + khash_count = calloc(thread_count, sizeof(unsigned long)); + if (!khash_count) { + perror("hash count array calloc"); + return 1; + } + + sem_init(&working, 0, 0); + + for (i = 0; i < thread_count; i++) { + if (pthread_create(&workers[i], NULL, work, &khash_count[i])) { + perror("pthread_create"); + return 1; + } + } + + int loops = 0; + /* workers started; wait on one to finish */ + while (sem_trywait(&working) && errno == EAGAIN) { + sleep(1); + loops++; + khashes = 0; + /* approximate hashes per second */ + for (i = 0; i < thread_count; i++) { + khashes += khash_count[i]; + } + printf("Average rate: %.2f kH/s (%.2f KH/s/thread)\n", + (double)khashes / loops, + ((double)khashes / loops) / thread_count); + } + + /* FIXME signal other children to exit - use existing sema? */ +// for (i = 0; i < thread_count; i++) { +// pthread_join(workers[i], NULL); +// } + + return 0; +} + |