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65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/* Copyright 2006 Nick Mathewson; see LICENSE for licensing information */
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/* $Id$ */
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/* id_to_fp.c : Helper for directory authority ops. When somebody sends us
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* a private key, this utility converts the private key into a fingerprint
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* so you can de-list that fingerprint.
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*/
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#include <openssl/rsa.h>
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#include <openssl/bio.h>
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#include <openssl/sha.h>
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#include <openssl/pem.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define die(s) do { fprintf(stderr, "%s\n", s); goto err; } while (0)
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int
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main(int argc, char **argv)
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{
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BIO *b = NULL;
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RSA *key = NULL;
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unsigned char *buf = NULL, *bufp;
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int len, i;
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unsigned char digest[20];
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int status = 1;
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if (argc != 2)
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die("I want a filename");
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if (!(b = BIO_new_file(argv[1], "r")))
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die("couldn't open file");
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if (!(key = PEM_read_bio_RSAPrivateKey(b, NULL, NULL, NULL)))
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die("couldn't parse key");
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len = i2d_RSAPublicKey(key, NULL);
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if (len < 0)
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die("Bizarre key");
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bufp = buf = malloc(len+1);
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if (!buf)
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die("Out of memory");
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len = i2d_RSAPublicKey(key, &bufp);
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if (len < 0)
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die("Bizarre key");
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SHA1(buf, len, digest);
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for (i=0; i < 20; i += 2) {
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printf("%02X%02X ", (int)digest[i], (int)digest[i+1]);
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}
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printf("\n");
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status = 0;
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err:
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if (buf)
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free(buf);
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if (key)
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RSA_free(key);
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if (b)
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BIO_free(b);
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return status;
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}
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