#include "test.h"int rsa_test(void){   unsigned char in[1024], out[1024], tmp[1024];   rsa_key       key;   int           hash_idx, prng_idx, stat, stat2;   unsigned long len, len2;   static unsigned char lparam[] = { 0x01, 0x02, 0x03, 0x04 };         hash_idx = find_hash("sha1");   prng_idx = find_prng("yarrow");   if (hash_idx == -1 || prng_idx == -1) {      printf("rsa_test requires SHA1 and yarrow");      return 1;   }      /* make a random key/msg */   yarrow_read(in, 20, &test_yarrow);      /* make a random key */   DO(rsa_make_key(&test_yarrow, prng_idx, 1024/8, 65537, &key));      /* encrypt the key (without lparam) */   len  = sizeof(out);   len2 = sizeof(tmp);   DO(rsa_encrypt_key(in, 20, out, &len, NULL, 0, &test_yarrow, prng_idx, hash_idx, &key));   /* change a byte */   out[0] ^= 1;   DO(rsa_decrypt_key(out, len, tmp, &len2, NULL, 0, &test_yarrow, prng_idx, hash_idx, &stat2, &key));   /* change a byte back */   out[0] ^= 1;   DO(rsa_decrypt_key(out, len, tmp, &len2, NULL, 0, &test_yarrow, prng_idx, hash_idx, &stat, &key));   if (!(stat == 1 && stat2 == 0)) {      printf("rsa_decrypt_key failed");      return 1;   }   if (len2 != 20 || memcmp(tmp, in, 20)) {      printf("rsa_decrypt_key mismatch len %lu", len2);      return 1;   }   /* encrypt the key (with lparam) */   len  = sizeof(out);   len2 = sizeof(tmp);   DO(rsa_encrypt_key(in, 20, out, &len, lparam, sizeof(lparam), &test_yarrow, prng_idx, hash_idx, &key));   /* change a byte */   out[0] ^= 1;   DO(rsa_decrypt_key(out, len, tmp, &len2, lparam, sizeof(lparam), &test_yarrow, prng_idx, hash_idx, &stat2, &key));   /* change a byte back */   out[0] ^= 1;   DO(rsa_decrypt_key(out, len, tmp, &len2, lparam, sizeof(lparam), &test_yarrow, prng_idx, hash_idx, &stat, &key));   if (!(stat == 1 && stat2 == 0)) {      printf("rsa_decrypt_key failed");      return 1;   }   if (len2 != 20 || memcmp(tmp, in, 20)) {      printf("rsa_decrypt_key mismatch len %lu", len2);      return 1;   }   /* sign a message (unsalted, lower cholestorol and Atkins approved) now */   len = sizeof(out);   DO(rsa_sign_hash(in, 20, out, &len, &test_yarrow, prng_idx, hash_idx, 0, &key));   DO(rsa_verify_hash(out, len, in, 20, &test_yarrow, prng_idx, hash_idx, 0, &stat, &key));   /* change a byte */   in[0] ^= 1;   DO(rsa_verify_hash(out, len, in, 20, &test_yarrow, prng_idx, hash_idx, 0, &stat2, &key));      if (!(stat == 1 && stat2 == 0)) {      printf("rsa_verify_hash (unsalted) failed, %d, %d", stat, stat2);      return 1;   }   /* sign a message (salted) now */   len = sizeof(out);   DO(rsa_sign_hash(in, 20, out, &len, &test_yarrow, prng_idx, hash_idx, 8, &key));   DO(rsa_verify_hash(out, len, in, 20, &test_yarrow, prng_idx, hash_idx, 8, &stat, &key));   /* change a byte */   in[0] ^= 1;   DO(rsa_verify_hash(out, len, in, 20, &test_yarrow, prng_idx, hash_idx, 8, &stat2, &key));      if (!(stat == 1 && stat2 == 0)) {      printf("rsa_verify_hash (salted) failed, %d, %d", stat, stat2);      return 1;   }      /* free the key and return */   rsa_free(&key);   return 0;}