mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-11-25 07:11:36 +00:00
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/*
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seed: 32 random bytes
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sk: sha512(seed)
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sk[0] &= 248
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sk[31] &= 127
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sk[31] |= 64
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pk: scalarmult_ed25519_base(sk)
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increment seed
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generate sk
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generate pk
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hash = sha512(mypub)
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if besthash:
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bestseed = seed
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bestseckey = sk
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bestpubkey = pk
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besthash = hash
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*/
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#include "yggdrasil-brute.h"
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int main(int argc, char **argv) {
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int i;
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int j;
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time_t starttime;
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time_t requestedtime;
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unsigned char bestsklist[NUMKEYS][64]; /* sk contains pk */
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unsigned char besthashlist[NUMKEYS][64];
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unsigned char seed[32];
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unsigned char sk[64];
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unsigned char pk[32];
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unsigned char hash[64];
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unsigned int runs = 0;
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int where;
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if (argc != 2) {
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fprintf(stderr, "usage: ./yggdrasil-brute-multi-curve25519 <seconds>\n");
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return 1;
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}
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if (sodium_init() < 0) {
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/* panic! the library couldn't be initialized, it is not safe to use */
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printf("sodium init failed!\n");
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return 1;
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}
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starttime = time(NULL);
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requestedtime = atoi(argv[1]);
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if (requestedtime < 0) requestedtime = 0;
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fprintf(stderr, "Searching for yggdrasil ed25519 keys (this will take slightly longer than %ld seconds)\n", requestedtime);
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sodium_memzero(bestsklist, NUMKEYS * 64);
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sodium_memzero(besthashlist, NUMKEYS * 64);
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randombytes_buf(seed, 32);
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do {
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/* generate pubkey, hash, compare, increment secret.
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* this loop should take 4 seconds on modern hardware */
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for (i = 0; i < (1 << 17); ++i) {
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++runs;
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crypto_hash_sha512(sk, seed, 32);
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if (crypto_scalarmult_ed25519_base(pk, sk) != 0) {
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printf("scalarmult to create pub failed!\n");
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return 1;
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}
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memcpy(sk + 32, pk, 32);
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crypto_hash_sha512(hash, pk, 32);
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/* insert into local list of good key */
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where = find_where(hash, besthashlist);
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if (where >= 0) {
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insert_64(bestsklist, sk, where);
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insert_64(besthashlist, hash, where);
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randombytes_buf(seed, 32);
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}
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for (j = 1; j < 31; ++j) if (++seed[j]) break;
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}
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} while (time(NULL) - starttime < requestedtime || runs < NUMKEYS);
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fprintf(stderr, "!! Secret key is seed concatenated with public !!\n");
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fprintf(stderr, "---hash--- ------------------------------seed------------------------------ -----------------------------public-----------------------------\n");
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for (i = 0; i < NUMKEYS; ++i) {
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for (j = 0; j < 5; ++j) printf("%02x", besthashlist[i][j]);
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printf(" ");
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for (j = 0; j < 32; ++j) printf("%02x", bestsklist[i][j]);
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printf(" ");
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for (j = 32; j < 64; ++j) printf("%02x", bestsklist[i][j]);
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printf("\n");
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}
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sodium_memzero(bestsklist, NUMKEYS * 64);
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sodium_memzero(sk, 64);
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sodium_memzero(seed, 32);
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return 0;
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}
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