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rsa_test.c

#include <tomcrypt_test.h>

#ifdef LTC_MRSA 

#define RSA_MSGSIZE 78

/* These are test keys [see file test.key] that I use to test my import/export against */
static const unsigned char openssl_private_rsa[] = {
   0x30, 0x82, 0x02, 0x5e, 0x02, 0x01, 0x00, 0x02, 0x81, 0x81, 0x00, 0xcf, 0x9a, 0xde, 0x64, 0x8a, 
   0xda, 0xc8, 0x33, 0x20, 0xa9, 0xd7, 0x83, 0x31, 0x19, 0x54, 0xb2, 0x9a, 0x85, 0xa7, 0xa1, 0xb7, 
   0x75, 0x33, 0xb6, 0xa9, 0xac, 0x84, 0x24, 0xb3, 0xde, 0xdb, 0x7d, 0x85, 0x2d, 0x96, 0x65, 0xe5, 
   0x3f, 0x72, 0x95, 0x24, 0x9f, 0x28, 0x68, 0xca, 0x4f, 0xdb, 0x44, 0x1c, 0x3e, 0x60, 0x12, 0x8a, 
   0xdd, 0x26, 0xa5, 0xeb, 0xff, 0x0b, 0x5e, 0xd4, 0x88, 0x38, 0x49, 0x2a, 0x6e, 0x5b, 0xbf, 0x12, 
   0x37, 0x47, 0xbd, 0x05, 0x6b, 0xbc, 0xdb, 0xf3, 0xee, 0xe4, 0x11, 0x8e, 0x41, 0x68, 0x7c, 0x61, 
   0x13, 0xd7, 0x42, 0xc8, 0x80, 0xbe, 0x36, 0x8f, 0xdc, 0x08, 0x8b, 0x4f, 0xac, 0xa4, 0xe2, 0x76, 
   0x0c, 0xc9, 0x63, 0x6c, 0x49, 0x58, 0x93, 0xed, 0xcc, 0xaa, 0xdc, 0x25, 0x3b, 0x0a, 0x60, 0x3f, 
   0x8b, 0x54, 0x3a, 0xc3, 0x4d, 0x31, 0xe7, 0x94, 0xa4, 0x44, 0xfd, 0x02, 0x03, 0x01, 0x00, 0x01, 
   0x02, 0x81, 0x81, 0x00, 0xc8, 0x62, 0xb9, 0xea, 0xde, 0x44, 0x53, 0x1d, 0x56, 0x97, 0xd9, 0x97, 
   0x9e, 0x1a, 0xcf, 0x30, 0x1e, 0x0a, 0x88, 0x45, 0x86, 0x29, 0x30, 0xa3, 0x4d, 0x9f, 0x61, 0x65, 
   0x73, 0xe0, 0xd6, 0x87, 0x8f, 0xb6, 0xf3, 0x06, 0xa3, 0x82, 0xdc, 0x7c, 0xac, 0xfe, 0x9b, 0x28, 
   0x9a, 0xae, 0xfd, 0xfb, 0xfe, 0x2f, 0x0e, 0xd8, 0x97, 0x04, 0xe3, 0xbb, 0x1f, 0xd1, 0xec, 0x0d, 
   0xba, 0xa3, 0x49, 0x7f, 0x47, 0xac, 0x8a, 0x44, 0x04, 0x7e, 0x86, 0xb7, 0x39, 0x42, 0x3f, 0xad, 
   0x1e, 0xb7, 0x0e, 0xa5, 0x51, 0xf4, 0x40, 0x63, 0x1e, 0xfd, 0xbd, 0xea, 0x9f, 0x41, 0x9f, 0xa8, 
   0x90, 0x1d, 0x6f, 0x0a, 0x5a, 0x95, 0x13, 0x11, 0x0d, 0x80, 0xaf, 0x5f, 0x64, 0x98, 0x8a, 0x2c, 
   0x78, 0x68, 0x65, 0xb0, 0x2b, 0x8b, 0xa2, 0x53, 0x87, 0xca, 0xf1, 0x64, 0x04, 0xab, 0xf2, 0x7b, 
   0xdb, 0x83, 0xc8, 0x81, 0x02, 0x41, 0x00, 0xf7, 0xbe, 0x5e, 0x23, 0xc3, 0x32, 0x3f, 0xbf, 0x8b, 
   0x8e, 0x3a, 0xee, 0xfc, 0xfc, 0xcb, 0xe5, 0xf7, 0xf1, 0x0b, 0xbc, 0x42, 0x82, 0xae, 0xd5, 0x7a, 
   0x3e, 0xca, 0xf7, 0xd5, 0x69, 0x3f, 0x64, 0x25, 0xa2, 0x1f, 0xb7, 0x75, 0x75, 0x05, 0x92, 0x42, 
   0xeb, 0xb8, 0xf1, 0xf3, 0x0a, 0x05, 0xe3, 0x94, 0xd1, 0x55, 0x78, 0x35, 0xa0, 0x36, 0xa0, 0x9b, 
   0x7c, 0x92, 0x84, 0x6c, 0xdd, 0xdc, 0x4d, 0x02, 0x41, 0x00, 0xd6, 0x86, 0x0e, 0x85, 0x42, 0x0b, 
   0x04, 0x08, 0x84, 0x21, 0x60, 0xf0, 0x0e, 0x0d, 0x88, 0xfd, 0x1e, 0x36, 0x10, 0x65, 0x4f, 0x1e, 
   0x53, 0xb4, 0x08, 0x72, 0x80, 0x5c, 0x3f, 0x59, 0x66, 0x17, 0xe6, 0x98, 0xf2, 0xe9, 0x6c, 0x7a, 
   0x06, 0x4c, 0xac, 0x76, 0x3d, 0xed, 0x8c, 0xa1, 0xce, 0xad, 0x1b, 0xbd, 0xb4, 0x7d, 0x28, 0xbc, 
   0xe3, 0x0e, 0x38, 0x8d, 0x99, 0xd8, 0x05, 0xb5, 0xa3, 0x71, 0x02, 0x40, 0x6d, 0xeb, 0xc3, 0x2d, 
   0x2e, 0xf0, 0x5e, 0xa4, 0x88, 0x31, 0x05, 0x29, 0x00, 0x8a, 0xd1, 0x95, 0x29, 0x9b, 0x83, 0xcf, 
   0x75, 0xdb, 0x31, 0xe3, 0x7a, 0x27, 0xde, 0x3a, 0x74, 0x30, 0x0c, 0x76, 0x4c, 0xd4, 0x50, 0x2a, 
   0x40, 0x2d, 0x39, 0xd9, 0x99, 0x63, 0xa9, 0x5d, 0x80, 0xae, 0x53, 0xca, 0x94, 0x3f, 0x05, 0x23, 
   0x1e, 0xf8, 0x05, 0x04, 0xe1, 0xb8, 0x35, 0xf2, 0x17, 0xb3, 0xa0, 0x89, 0x02, 0x41, 0x00, 0xab, 
   0x90, 0x88, 0xfa, 0x60, 0x08, 0x29, 0x50, 0x9a, 0x43, 0x8b, 0xa0, 0x50, 0xcc, 0xd8, 0x5a, 0xfe, 
   0x97, 0x64, 0x63, 0x71, 0x74, 0x22, 0xa3, 0x20, 0x02, 0x5a, 0xcf, 0xeb, 0xc6, 0x16, 0x95, 0x54, 
   0xd1, 0xcb, 0xab, 0x8d, 0x1a, 0xc6, 0x00, 0xfa, 0x08, 0x92, 0x9c, 0x71, 0xd5, 0x52, 0x52, 0x35, 
   0x96, 0x71, 0x4b, 0x8b, 0x92, 0x0c, 0xd0, 0xe9, 0xbf, 0xad, 0x63, 0x0b, 0xa5, 0xe9, 0xb1, 0x02, 
   0x41, 0x00, 0xdc, 0xcc, 0x27, 0xc8, 0xe4, 0xdc, 0x62, 0x48, 0xd5, 0x9b, 0xaf, 0xf5, 0xab, 0x60, 
   0xf6, 0x21, 0xfd, 0x53, 0xe2, 0xb7, 0x5d, 0x09, 0xc9, 0x1a, 0xa1, 0x04, 0xa9, 0xfc, 0x61, 0x2c, 
   0x5d, 0x04, 0x58, 0x3a, 0x5a, 0x39, 0xf1, 0x4a, 0x21, 0x56, 0x67, 0xfd, 0xcc, 0x20, 0xa3, 0x8f, 
   0x78, 0x18, 0x5a, 0x79, 0x3d, 0x2e, 0x8e, 0x7e, 0x86, 0x0a, 0xe6, 0xa8, 0x33, 0xc1, 0x04, 0x17, 
   0x4a, 0x9f,  };


/*** openssl public RSA key in DER format */
static const unsigned char openssl_public_rsa[] = {
   0x30, 0x81, 0x9f, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01,
   0x05, 0x00, 0x03, 0x81, 0x8d, 0x00, 0x30, 0x81, 0x89, 0x02, 0x81, 0x81, 0x00, 0xcf, 0x9a, 0xde,
   0x64, 0x8a, 0xda, 0xc8, 0x33, 0x20, 0xa9, 0xd7, 0x83, 0x31, 0x19, 0x54, 0xb2, 0x9a, 0x85, 0xa7,
   0xa1, 0xb7, 0x75, 0x33, 0xb6, 0xa9, 0xac, 0x84, 0x24, 0xb3, 0xde, 0xdb, 0x7d, 0x85, 0x2d, 0x96,
   0x65, 0xe5, 0x3f, 0x72, 0x95, 0x24, 0x9f, 0x28, 0x68, 0xca, 0x4f, 0xdb, 0x44, 0x1c, 0x3e, 0x60,
   0x12, 0x8a, 0xdd, 0x26, 0xa5, 0xeb, 0xff, 0x0b, 0x5e, 0xd4, 0x88, 0x38, 0x49, 0x2a, 0x6e, 0x5b,
   0xbf, 0x12, 0x37, 0x47, 0xbd, 0x05, 0x6b, 0xbc, 0xdb, 0xf3, 0xee, 0xe4, 0x11, 0x8e, 0x41, 0x68,
   0x7c, 0x61, 0x13, 0xd7, 0x42, 0xc8, 0x80, 0xbe, 0x36, 0x8f, 0xdc, 0x08, 0x8b, 0x4f, 0xac, 0xa4,
   0xe2, 0x76, 0x0c, 0xc9, 0x63, 0x6c, 0x49, 0x58, 0x93, 0xed, 0xcc, 0xaa, 0xdc, 0x25, 0x3b, 0x0a,
   0x60, 0x3f, 0x8b, 0x54, 0x3a, 0xc3, 0x4d, 0x31, 0xe7, 0x94, 0xa4, 0x44, 0xfd, 0x02, 0x03, 0x01,
   0x00, 0x01,  };

/* same key but with extra headers stripped */
static const unsigned char openssl_public_rsa_stripped[] = {
   0x30, 0x81, 0x89, 0x02, 0x81, 0x81, 0x00, 0xcf, 0x9a, 0xde, 
   0x64, 0x8a, 0xda, 0xc8, 0x33, 0x20, 0xa9, 0xd7, 0x83, 0x31, 0x19, 0x54, 0xb2, 0x9a, 0x85, 0xa7, 
   0xa1, 0xb7, 0x75, 0x33, 0xb6, 0xa9, 0xac, 0x84, 0x24, 0xb3, 0xde, 0xdb, 0x7d, 0x85, 0x2d, 0x96, 
   0x65, 0xe5, 0x3f, 0x72, 0x95, 0x24, 0x9f, 0x28, 0x68, 0xca, 0x4f, 0xdb, 0x44, 0x1c, 0x3e, 0x60, 
   0x12, 0x8a, 0xdd, 0x26, 0xa5, 0xeb, 0xff, 0x0b, 0x5e, 0xd4, 0x88, 0x38, 0x49, 0x2a, 0x6e, 0x5b, 
   0xbf, 0x12, 0x37, 0x47, 0xbd, 0x05, 0x6b, 0xbc, 0xdb, 0xf3, 0xee, 0xe4, 0x11, 0x8e, 0x41, 0x68, 
   0x7c, 0x61, 0x13, 0xd7, 0x42, 0xc8, 0x80, 0xbe, 0x36, 0x8f, 0xdc, 0x08, 0x8b, 0x4f, 0xac, 0xa4, 
   0xe2, 0x76, 0x0c, 0xc9, 0x63, 0x6c, 0x49, 0x58, 0x93, 0xed, 0xcc, 0xaa, 0xdc, 0x25, 0x3b, 0x0a, 
   0x60, 0x3f, 0x8b, 0x54, 0x3a, 0xc3, 0x4d, 0x31, 0xe7, 0x94, 0xa4, 0x44, 0xfd, 0x02, 0x03, 0x01, 
   0x00, 0x01,  };

static int rsa_compat_test(void)
{
   rsa_key key;
   unsigned char buf[1024];
   unsigned long len;

   /* try reading the key */
   DO(rsa_import(openssl_private_rsa, sizeof(openssl_private_rsa), &key));

   /* now try to export private/public and compare */
   len = sizeof(buf);
   DO(rsa_export(buf, &len, PK_PRIVATE, &key));
   if (len != sizeof(openssl_private_rsa) || memcmp(buf, openssl_private_rsa, len)) {
      fprintf(stderr, "RSA private export failed to match OpenSSL output, %lu, %lu\n", len, (unsigned long)sizeof(openssl_private_rsa));
      return 1;
   }

   len = sizeof(buf);
   DO(rsa_export(buf, &len, PK_PUBLIC, &key));
   if (len != sizeof(openssl_public_rsa_stripped) || memcmp(buf, openssl_public_rsa_stripped, len)) {
      fprintf(stderr, "RSA(private) public export failed to match OpenSSL output\n");
      return 1;
   }
   rsa_free(&key);

   /* try reading the public key */
   DO(rsa_import(openssl_public_rsa_stripped, sizeof(openssl_public_rsa_stripped), &key));
   len = sizeof(buf);
   DO(rsa_export(buf, &len, PK_PUBLIC, &key));
   if (len != sizeof(openssl_public_rsa_stripped) || memcmp(buf, openssl_public_rsa_stripped, len)) {
      fprintf(stderr, "RSA(public) stripped public import failed to match OpenSSL output\n");
      return 1;
   }
   rsa_free(&key);

   /* try reading the public key */
   DO(rsa_import(openssl_public_rsa, sizeof(openssl_public_rsa), &key));
   len = sizeof(buf);
   DO(rsa_export(buf, &len, PK_PUBLIC, &key));
   if (len != sizeof(openssl_public_rsa_stripped) || memcmp(buf, openssl_public_rsa_stripped, len)) {
      fprintf(stderr, "RSA(public) SSL public import failed to match OpenSSL output\n");
      return 1;
   }
   rsa_free(&key);

   return 0;
}   

int rsa_test(void)
{
   unsigned char in[1024], out[1024], tmp[1024];
   rsa_key       key, privKey, pubKey;
   int           hash_idx, prng_idx, stat, stat2;
   unsigned long rsa_msgsize, len, len2, cnt;
   static unsigned char lparam[] = { 0x01, 0x02, 0x03, 0x04 };

   if (rsa_compat_test() != 0) {
      return 1;
   }
      
   hash_idx = find_hash("sha1");
   prng_idx = find_prng("yarrow");
   if (hash_idx == -1 || prng_idx == -1) {
      fprintf(stderr, "rsa_test requires LTC_SHA1 and yarrow");
      return 1;
   }
   
   /* make 10 random key */
   for (cnt = 0; cnt < 10; cnt++) {
      DO(rsa_make_key(&yarrow_prng, prng_idx, 1024/8, 65537, &key));
      if (mp_count_bits(key.N) != 1024) {
         fprintf(stderr, "rsa_1024 key modulus has %d bits\n", mp_count_bits(key.N));

len = mp_unsigned_bin_size(key.N);
mp_to_unsigned_bin(key.N, tmp);
 fprintf(stderr, "N == \n");
for (cnt = 0; cnt < len; ) {
   fprintf(stderr, "%02x ", tmp[cnt]);
   if (!(++cnt & 15)) fprintf(stderr, "\n");
}

len = mp_unsigned_bin_size(key.p);
mp_to_unsigned_bin(key.p, tmp);
 fprintf(stderr, "p == \n");
for (cnt = 0; cnt < len; ) {
   fprintf(stderr, "%02x ", tmp[cnt]);
   if (!(++cnt & 15)) fprintf(stderr, "\n");
}

len = mp_unsigned_bin_size(key.q);
mp_to_unsigned_bin(key.q, tmp);
 fprintf(stderr, "\nq == \n");
for (cnt = 0; cnt < len; ) {
   fprintf(stderr, "%02x ", tmp[cnt]);
   if (!(++cnt & 15)) fprintf(stderr, "\n");
}
 fprintf(stderr, "\n");


         return 1;
      }
      if (cnt != 9) {
         rsa_free(&key);
      }
   }
    
   /* encrypt the key (without lparam) */
   for (cnt = 0; cnt < 4; cnt++) {
   for (rsa_msgsize = 1; rsa_msgsize <= 86; rsa_msgsize++) {
      /* make a random key/msg */
      yarrow_read(in, rsa_msgsize, &yarrow_prng);

      len  = sizeof(out);
      len2 = rsa_msgsize;
   
      DO(rsa_encrypt_key(in, rsa_msgsize, out, &len, NULL, 0, &yarrow_prng, prng_idx, hash_idx, &key));
      /* change a byte */
      out[8] ^= 1;
      DO(rsa_decrypt_key(out, len, tmp, &len2, NULL, 0, hash_idx, &stat2, &key));
      /* change a byte back */
      out[8] ^= 1;
      if (len2 != rsa_msgsize) {
         fprintf(stderr, "\nrsa_decrypt_key mismatch len %lu (first decrypt)", len2);
         return 1;
      }

      len2 = rsa_msgsize;
      DO(rsa_decrypt_key(out, len, tmp, &len2, NULL, 0, hash_idx, &stat, &key));
      if (!(stat == 1 && stat2 == 0)) {
         fprintf(stderr, "rsa_decrypt_key failed");
         return 1;
      }
      if (len2 != rsa_msgsize || memcmp(tmp, in, rsa_msgsize)) {
         unsigned long x;
         fprintf(stderr, "\nrsa_decrypt_key mismatch, len %lu (second decrypt)\n", len2);
         fprintf(stderr, "Original contents: \n"); 
         for (x = 0; x < rsa_msgsize; ) {
             fprintf(stderr, "%02x ", in[x]);
             if (!(++x % 16)) {
                fprintf(stderr, "\n");
             }
         }
         fprintf(stderr, "\n");
         fprintf(stderr, "Output contents: \n"); 
         for (x = 0; x < rsa_msgsize; ) {
             fprintf(stderr, "%02x ", out[x]);
             if (!(++x % 16)) {
                fprintf(stderr, "\n");
             }
         }     
         fprintf(stderr, "\n");
         return 1;
      }
   }
   }

   /* encrypt the key (with lparam) */
   for (rsa_msgsize = 1; rsa_msgsize <= 86; rsa_msgsize++) {
      len  = sizeof(out);
      len2 = rsa_msgsize;
      DO(rsa_encrypt_key(in, rsa_msgsize, out, &len, lparam, sizeof(lparam), &yarrow_prng, prng_idx, hash_idx, &key));
      /* change a byte */
      out[8] ^= 1;
      DO(rsa_decrypt_key(out, len, tmp, &len2, lparam, sizeof(lparam), hash_idx, &stat2, &key));
      if (len2 != rsa_msgsize) {
         fprintf(stderr, "\nrsa_decrypt_key mismatch len %lu (first decrypt)", len2);
         return 1;
      }
      /* change a byte back */
      out[8] ^= 1;

      len2 = rsa_msgsize;
      DO(rsa_decrypt_key(out, len, tmp, &len2, lparam, sizeof(lparam), hash_idx, &stat, &key));
      if (!(stat == 1 && stat2 == 0)) {
         fprintf(stderr, "rsa_decrypt_key failed");
         return 1;
      }
      if (len2 != rsa_msgsize || memcmp(tmp, in, rsa_msgsize)) {
         fprintf(stderr, "rsa_decrypt_key mismatch len %lu", len2);
         return 1;
      }
   }

   /* encrypt the key LTC_PKCS #1 v1.5 (payload from 1 to 117 bytes) */
   for (rsa_msgsize = 1; rsa_msgsize <= 117; rsa_msgsize++) {
      len  = sizeof(out);
      len2 = rsa_msgsize;
      DO(rsa_encrypt_key_ex(in, rsa_msgsize, out, &len, NULL, 0, &yarrow_prng, prng_idx, 0, LTC_LTC_PKCS_1_V1_5, &key));

      len2 = rsa_msgsize;
      DO(rsa_decrypt_key_ex(out, len, tmp, &len2, NULL, 0, 0, LTC_LTC_PKCS_1_V1_5, &stat, &key));
      if (!(stat == 1 && stat2 == 0)) {
         fprintf(stderr, "rsa_decrypt_key_ex failed, %d, %d", stat, stat2);
         return 1;
      }
      if (len2 != rsa_msgsize || memcmp(tmp, in, rsa_msgsize)) {
         fprintf(stderr, "rsa_decrypt_key_ex 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, &yarrow_prng, prng_idx, hash_idx, 0, &key));

/* export key and import as both private and public */
   len2 = sizeof(tmp);
   DO(rsa_export(tmp, &len2, PK_PRIVATE, &key)); 
   DO(rsa_import(tmp, len2, &privKey)); 
   len2 = sizeof(tmp);
   DO(rsa_export(tmp, &len2, PK_PUBLIC, &key));
   DO(rsa_import(tmp, len2, &pubKey));

   /* verify with original */
   DO(rsa_verify_hash(out, len, in, 20, hash_idx, 0, &stat, &key));
   /* change a byte */
   in[0] ^= 1;
   DO(rsa_verify_hash(out, len, in, 20, hash_idx, 0, &stat2, &key));
   
   if (!(stat == 1 && stat2 == 0)) {
      fprintf(stderr, "rsa_verify_hash (unsalted, origKey) failed, %d, %d", stat, stat2);
      rsa_free(&key);
      rsa_free(&pubKey);
      rsa_free(&privKey);
      return 1;
   }

   /* verify with privKey */
   /* change a byte */
   in[0] ^= 1;
   DO(rsa_verify_hash(out, len, in, 20, hash_idx, 0, &stat, &privKey));
   /* change a byte */
   in[0] ^= 1;
   DO(rsa_verify_hash(out, len, in, 20, hash_idx, 0, &stat2, &privKey));
   
   if (!(stat == 1 && stat2 == 0)) {
      fprintf(stderr, "rsa_verify_hash (unsalted, privKey) failed, %d, %d", stat, stat2);
      rsa_free(&key);
      rsa_free(&pubKey);
      rsa_free(&privKey);
      return 1;
   }

   /* verify with pubKey */
   /* change a byte */
   in[0] ^= 1;
   DO(rsa_verify_hash(out, len, in, 20, hash_idx, 0, &stat, &pubKey));
   /* change a byte */
   in[0] ^= 1;
   DO(rsa_verify_hash(out, len, in, 20, hash_idx, 0, &stat2, &pubKey));
   
   if (!(stat == 1 && stat2 == 0)) {
      fprintf(stderr, "rsa_verify_hash (unsalted, pubkey) failed, %d, %d", stat, stat2);
      rsa_free(&key);
      rsa_free(&pubKey);
      rsa_free(&privKey);
      return 1;
   }

   /* sign a message (salted) now (use privKey to make, pubKey to verify) */
   len = sizeof(out);
   DO(rsa_sign_hash(in, 20, out, &len, &yarrow_prng, prng_idx, hash_idx, 8, &privKey));
   DO(rsa_verify_hash(out, len, in, 20, hash_idx, 8, &stat, &pubKey));
   /* change a byte */
   in[0] ^= 1;
   DO(rsa_verify_hash(out, len, in, 20, hash_idx, 8, &stat2, &pubKey));
   
   if (!(stat == 1 && stat2 == 0)) {
      fprintf(stderr, "rsa_verify_hash (salted) failed, %d, %d", stat, stat2);
      rsa_free(&key);
      rsa_free(&pubKey);
      rsa_free(&privKey);
      return 1;
   }
   
   /* sign a message with LTC_PKCS #1 v1.5 */
   len = sizeof(out);
   DO(rsa_sign_hash_ex(in, 20, out, &len, LTC_LTC_PKCS_1_V1_5, &yarrow_prng, prng_idx, hash_idx, 8, &privKey));
   DO(rsa_verify_hash_ex(out, len, in, 20, LTC_LTC_PKCS_1_V1_5, hash_idx, 8, &stat, &pubKey));
   /* change a byte */
   in[0] ^= 1;
   DO(rsa_verify_hash_ex(out, len, in, 20, LTC_LTC_PKCS_1_V1_5, hash_idx, 8, &stat2, &pubKey));
   
   if (!(stat == 1 && stat2 == 0)) {
      fprintf(stderr, "rsa_verify_hash_ex failed, %d, %d", stat, stat2);
      rsa_free(&key);
      rsa_free(&pubKey);
      rsa_free(&privKey);
      return 1;
   }

   /* free the key and return */
   rsa_free(&key);
   rsa_free(&pubKey);
   rsa_free(&privKey);
   return 0;
}

#else

int rsa_test(void)
{
   fprintf(stderr, "NOP");
   return 0;
}

#endif

/* $Source: /cvs/libtom/libtomcrypt/testprof/rsa_test.c,v $ */
/* $Revision: 1.20 $ */
/* $Date: 2007/05/12 14:32:35 $ */

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