Bug #5170 - remove id_to_fp.c as it's not used anywhere

changes/bug5170

@@ -0,0 +1,2 @@
+  o Code simplification and refactoring:
+    - Remove contrib/id_to_fp.c since it wasn't used anywhere.

contrib/id_to_fp.c

@@ -1,77 +0,0 @@
-/* Copyright 2006 Nick Mathewson; see LICENSE for licensing information */
-
-/* id_to_fp.c : Helper for directory authority ops.  When somebody sends us
- * a private key, this utility converts the private key into a fingerprint
- * so you can de-list that fingerprint.
- */
-
-#include <openssl/rsa.h>
-#include <openssl/bio.h>
-#include <openssl/sha.h>
-#include <openssl/pem.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define die(s) do { fprintf(stderr, "%s\n", s); goto err; } while (0)
-
-int
-main(int argc, char **argv)
-{
-  BIO *b = NULL;
-  RSA *key = NULL;
-  unsigned char *buf = NULL, *bufp;
-  int len, i;
-  unsigned char digest[20];
-  int status = 1;
-
-  if (argc < 2) {
-    fprintf(stderr, "Reading key from stdin...\n");
-    if (!(b = BIO_new_fp(stdin, BIO_NOCLOSE)))
-      die("couldn't read from stdin");
-  } else if (argc == 2) {
-    if (strcmp(argv[1], "-h") == 0 ||
-        strcmp(argv[1], "--help") == 0) {
-      fprintf(stdout, "Usage: %s [keyfile]\n", argv[0]);
-      status = 0;
-      goto err;
-    } else {
-      if (!(b = BIO_new_file(argv[1], "r")))
-        die("couldn't open file");
-    }
-  } else {
-    fprintf(stderr, "Usage: %s [keyfile]\n", argv[0]);
-    goto err;
-  }
-  if (!(key = PEM_read_bio_RSAPrivateKey(b, NULL, NULL, NULL)))
-    die("couldn't parse key");
-
-  len = i2d_RSAPublicKey(key, NULL);
-  if (len < 0)
-    die("Bizarre key");
-  bufp = buf = malloc(len+1);
-  if (!buf)
-    die("Out of memory");
-  len = i2d_RSAPublicKey(key, &bufp);
-  if (len < 0)
-    die("Bizarre key");
-
-  SHA1(buf, len, digest);
-  for (i=0; i < 20; i += 2) {
-    printf("%02X%02X ", (int)digest[i], (int)digest[i+1]);
-  }
-  printf("\n");
-
-  status = 0;
-
-err:
-  if (buf)
-    free(buf);
-  if (key)
-    RSA_free(key);
-  if (b)
-    BIO_free(b);
-  return status;
-}
-