src/tools/tor-checkkey.c

   1
   2 #define CRYPTO_PRIVATE
   3
   4 #include "orconfig.h"
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include "crypto.h"
   9 #include "log.h"
  10 #include "util.h"
  11 #include "compat.h"
  12 #include <openssl/bn.h>
  13 #include <openssl/rsa.h>
  14
  15 int main(int c, char **v)
  16 {
  17   crypto_pk_env_t *env;
  18   char *str;
  19   RSA *rsa;
  20   int wantdigest=0;
  21   int fname_idx;
  22   init_logging();
  23
  24   if (c < 2) {
  25     fprintf(stderr, "Hi. I'm tor-checkkey.  Tell me a filename that "
  26             "has a PEM-encoded RSA public key (like in a cert) and I'll "
  27             "dump the modulus.  Use the --digest option too and I'll "
  28             "dump the digest.\n");
  29     return 1;
  30   }
  31
  32   if (crypto_global_init(0)) {
  33     fprintf(stderr, "Couldn't initialize crypto library.\n");
  34     return 1;
  35   }
  36
  37   if (!strcmp(v[1], "--digest")) {
  38     wantdigest = 1;
  39     fname_idx = 2;
  40     if (c<3) {
  41       fprintf(stderr, "too few arguments");
  42       return 1;
  43     }
  44   } else {
  45     wantdigest = 0;
  46     fname_idx = 1;
  47   }
  48
  49   str = read_file_to_str(v[fname_idx], 0, NULL);
  50   if (!str) {
  51     fprintf(stderr, "Couldn't read %s\n", v[fname_idx]);
  52     return 1;
  53   }
  54
  55   env = crypto_new_pk_env();
  56   if (crypto_pk_read_public_key_from_string(env, str, strlen(str))<0) {
  57     fprintf(stderr, "Couldn't parse key.\n");
  58     return 1;
  59   }
  60   tor_free(str);
  61
  62   if (wantdigest) {
  63     char digest[HEX_DIGEST_LEN+1];
  64     if (crypto_pk_get_fingerprint(env, digest, 0)<0)
  65       return 1;
  66     printf("%s\n",digest);
  67   } else {
  68     rsa = _crypto_pk_env_get_rsa(env);
  69     str = BN_bn2hex(rsa->n);
  70
  71     printf("%s\n", str);
  72   }
  73
  74   return 0;
  75 }
  76