126 linhas
3.5 KiB
C
126 linhas
3.5 KiB
C
#include <stdio.h>
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#include <string.h>
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#include "../xmss_fast.h"
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#define MLEN 3491
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#define SIGNATURES 4096
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unsigned char mi[MLEN];
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unsigned long long smlen;
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unsigned long long mlen;
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int main()
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{
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int r;
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unsigned long long i,j;
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unsigned int n = 32;
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unsigned int h = 12;
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unsigned int d = 3;
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unsigned int w = 16;
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unsigned int k = 2;
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xmssmt_params p;
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xmssmt_params *params = &p;
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if (xmssmt_set_params(params, n, h, d, w, k)) {
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return 1;
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}
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unsigned int tree_h = h / d;
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// stack needs to be larger than regular (H-K-1), since we re-use for 'next'
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unsigned char stack[(2*d-1) * (tree_h + 1)*n];
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unsigned char stacklevels[(2*d-1) * (tree_h + 1)*n];
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unsigned char auth[(2*d-1) * tree_h*n];
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unsigned char keep[(2*d-1) * (tree_h >> 1)*n];
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treehash_inst treehash[(2*d-1) * (tree_h-k)];
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unsigned char th_nodes[(2*d-1) * (tree_h-k)*n];
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unsigned char retain[(2*d-1) * ((1 << k) - k - 1)*n];
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unsigned char wots_sigs[d * params->xmss_par.wots_par.keysize];
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// first d are 'regular' states, second d are 'next'; top tree has no 'next'
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bds_state states[2*d-1];
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for (i = 0; i < 2*d-1; i++) {
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for (j = 0; j < tree_h-k; j++)
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treehash[i*(tree_h-k) + j].node = th_nodes + (i*(tree_h-k) + j) * n;
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xmss_set_bds_state(states + i,
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stack + i*(tree_h + 1)*n, 0, stacklevels + i*(tree_h + 1),
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auth + i*tree_h*n,
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keep + i*(tree_h >> 1)*n,
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treehash + i*(tree_h-k),
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retain + i*((1 << k) - k - 1)*n,
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0
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);
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}
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unsigned char sk[(params->index_len+4*n)];
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unsigned char pk[2*n];
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unsigned long long signature_length = params->index_len + n + (d*params->xmss_par.wots_par.keysize) + h*n;
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unsigned char mo[MLEN+signature_length];
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unsigned char sm[MLEN+signature_length];
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FILE *urandom = fopen("/dev/urandom", "r");
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for (i = 0; i < MLEN; i++) mi[i] = fgetc(urandom);
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printf("keypair\n");
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xmssmt_keypair(pk, sk, states, wots_sigs, params);
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// check pub_seed in SK
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for (i = 0; i < n; i++) {
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if (pk[n+i] != sk[params->index_len+2*n+i]) printf("pk.pub_seed != sk.pub_seed %llu",i);
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if (pk[i] != sk[params->index_len+3*n+i]) printf("pk.root != sk.root %llu",i);
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}
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printf("pk checked\n");
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unsigned int idx_len = params->index_len;
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// check index
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unsigned long long idx = 0;
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for (i = 0; i < idx_len; i++) {
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idx |= ((unsigned long long)sk[i]) << 8*(idx_len - 1 - i);
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}
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if (idx) printf("\nidx != 0: %llu\n",idx);
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for (i = 0; i < SIGNATURES; i++) {
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printf("sign\n");
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xmssmt_sign(sk, states, wots_sigs, sm, &smlen, mi, MLEN, params);
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idx = 0;
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for (j = 0; j < idx_len; j++) {
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idx += ((unsigned long long)sm[j]) << 8*(idx_len - 1 - j);
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}
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printf("\nidx = %llu\n",idx);
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r = memcmp(mi, sm+signature_length,MLEN);
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printf("%d\n", r);
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/* Test valid signature */
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printf("verify\n");
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r = xmssmt_sign_open(mo, &mlen, sm, smlen, pk, params);
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printf("%d\n", r);
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r = memcmp(mi,mo,MLEN);
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printf("%d\n", r);
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printf("%llu\n", MLEN-mlen);
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/* Test with modified message */
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sm[52] ^= 1;
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r = xmssmt_sign_open(mo, &mlen, sm, smlen, pk, params);
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printf("%d\n", r+1);
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r = memcmp(mi,mo,MLEN);
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printf("%d\n", (r!=0) - 1);
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printf("%llu\n", mlen+1);
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/* Test with modified signature */
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sm[260] ^= 1;
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sm[52] ^= 1;
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sm[2] ^= 1;
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r = xmssmt_sign_open(mo, &mlen, sm, smlen, pk, params);
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printf("%d\n", r+1);
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r = memcmp(mi,mo,MLEN);
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printf("%d\n", (r!=0) - 1);
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printf("%llu\n", mlen+1);
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}
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fclose(urandom);
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return 0;
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}
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