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/* Copyright (c) 2008-2013, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#include "orconfig.h"
#include <stdio.h>
#include <stdlib.h>
#include "crypto.h"
#include "torlog.h"
#include "../common/util.h"
#include "compat.h"
#include <openssl/bn.h>
#include <openssl/rsa.h>
int
main(int c, char **v)
{
crypto_pk_t *env;
char *str;
RSA *rsa;
int wantdigest=0;
int fname_idx;
char *fname=NULL;
init_logging();
if (c < 2) {
fprintf(stderr, "Hi. I'm tor-checkkey. Tell me a filename that "
"has a PEM-encoded RSA public key (like in a cert) and I'll "
"dump the modulus. Use the --digest option too and I'll "
"dump the digest.\n");
return 1;
}
if (crypto_global_init(0, NULL, NULL)) {
fprintf(stderr, "Couldn't initialize crypto library.\n");
return 1;
}
if (!strcmp(v[1], "--digest")) {
wantdigest = 1;
fname_idx = 2;
if (c<3) {
fprintf(stderr, "too few arguments");
return 1;
}
} else {
wantdigest = 0;
fname_idx = 1;
}
fname = expand_filename(v[fname_idx]);
str = read_file_to_str(fname, 0, NULL);
tor_free(fname);
if (!str) {
fprintf(stderr, "Couldn't read %s\n", v[fname_idx]);
return 1;
}
env = crypto_pk_new();
if (crypto_pk_read_public_key_from_string(env, str, strlen(str))<0) {
fprintf(stderr, "Couldn't parse key.\n");
return 1;
}
tor_free(str);
if (wantdigest) {
char digest[HEX_DIGEST_LEN+1];
if (crypto_pk_get_fingerprint(env, digest, 0)<0)
return 1;
printf("%s\n",digest);
} else {
rsa = crypto_pk_get_rsa_(env);
str = BN_bn2hex(rsa->n);
printf("%s\n", str);
}
return 0;
}
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