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498 lines
10 KiB
C
498 lines
10 KiB
C
/* protect-tool.c - A tool to text the secret key protection
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* Copyright (C) 2002 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <gcrypt.h>
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#define JNLIB_NEED_LOG_LOGV
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#include "agent.h"
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#define N_(a) a
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#define _(a) a
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enum cmd_and_opt_values
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{ aNull = 0,
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oVerbose = 'v',
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oArmor = 'a',
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oPassphrase = 'P',
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oProtect = 'p',
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oUnprotect = 'u',
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oNoVerbose = 500,
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oShadow,
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oShowShadowInfo,
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oShowKeygrip,
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aTest };
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static int opt_armor;
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static const char *passphrase = "abc";
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static ARGPARSE_OPTS opts[] = {
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{ 301, NULL, 0, N_("@Options:\n ") },
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{ oVerbose, "verbose", 0, "verbose" },
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{ oArmor, "armor", 0, "write output in advanced format" },
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{ oPassphrase, "passphrase", 2, "|STRING| Use passphrase STRING" },
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{ oProtect, "protect", 256, "protect a private key"},
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{ oUnprotect, "unprotect", 256, "unprotect a private key"},
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{ oShadow, "shadow", 256, "create a shadow entry for a priblic key"},
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{ oShowShadowInfo, "show-shadow-info", 256, "return the shadow info"},
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{ oShowKeygrip, "show-keygrip", 256, " show the \"keygrip\""},
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{0}
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};
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static const char *
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my_strusage (int level)
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{
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const char *p;
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switch (level)
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{
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case 11: p = "protect-tool (GnuPG)";
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break;
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case 13: p = VERSION; break;
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case 17: p = PRINTABLE_OS_NAME; break;
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case 19: p = _("Please report bugs to <" PACKAGE_BUGREPORT ">.\n");
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break;
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case 1:
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case 40: p = _("Usage: protect-tool [options] (-h for help)\n");
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break;
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case 41: p = _("Syntax: protect-tool [options] [args]]\n"
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"INTERNAL USE ONLY!\n");
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break;
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default: p = NULL;
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}
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return p;
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}
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static void
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i18n_init (void)
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{
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#ifdef USE_SIMPLE_GETTEXT
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set_gettext_file( PACKAGE );
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#else
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#ifdef ENABLE_NLS
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/* gtk_set_locale (); HMMM: We have not yet called gtk_init */
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bindtextdomain( PACKAGE, GNUPG_LOCALEDIR );
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textdomain( PACKAGE );
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#endif
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#endif
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}
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/* Used by gcry for logging */
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static void
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my_gcry_logger (void *dummy, int level, const char *fmt, va_list arg_ptr)
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{
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/* translate the log levels */
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switch (level)
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{
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case GCRY_LOG_CONT: level = JNLIB_LOG_CONT; break;
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case GCRY_LOG_INFO: level = JNLIB_LOG_INFO; break;
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case GCRY_LOG_WARN: level = JNLIB_LOG_WARN; break;
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case GCRY_LOG_ERROR:level = JNLIB_LOG_ERROR; break;
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case GCRY_LOG_FATAL:level = JNLIB_LOG_FATAL; break;
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case GCRY_LOG_BUG: level = JNLIB_LOG_BUG; break;
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case GCRY_LOG_DEBUG:level = JNLIB_LOG_DEBUG; break;
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default: level = JNLIB_LOG_ERROR; break; }
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log_logv (level, fmt, arg_ptr);
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}
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static unsigned char *
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make_canonical (const char *fname, const char *buf, size_t buflen)
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{
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int rc;
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size_t erroff, len;
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GCRY_SEXP sexp;
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unsigned char *result;
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rc = gcry_sexp_sscan (&sexp, &erroff, buf, buflen);
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if (rc)
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{
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log_error ("invalid S-Expression in `%s' (off=%u): %s\n",
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fname, (unsigned int)erroff, gcry_strerror (rc));
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return NULL;
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}
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len = gcry_sexp_sprint (sexp, GCRYSEXP_FMT_CANON, NULL, 0);
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assert (len);
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result = xmalloc (len);
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len = gcry_sexp_sprint (sexp, GCRYSEXP_FMT_CANON, result, len);
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assert (len);
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gcry_sexp_release (sexp);
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return result;
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}
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static char *
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make_advanced (const unsigned char *buf, size_t buflen)
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{
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int rc;
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size_t erroff, len;
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GCRY_SEXP sexp;
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unsigned char *result;
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rc = gcry_sexp_sscan (&sexp, &erroff, buf, buflen);
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if (rc)
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{
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log_error ("invalid canonical S-Expression (off=%u): %s\n",
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(unsigned int)erroff, gcry_strerror (rc));
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return NULL;
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}
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len = gcry_sexp_sprint (sexp, GCRYSEXP_FMT_ADVANCED, NULL, 0);
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assert (len);
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result = xmalloc (len);
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len = gcry_sexp_sprint (sexp, GCRYSEXP_FMT_ADVANCED, result, len);
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assert (len);
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gcry_sexp_release (sexp);
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return result;
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}
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static unsigned char *
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read_key (const char *fname)
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{
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FILE *fp;
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struct stat st;
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char *buf;
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size_t buflen;
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unsigned char *key;
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fp = fopen (fname, "rb");
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if (!fp)
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{
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log_error ("can't open `%s': %s\n", fname, strerror (errno));
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return NULL;
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}
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if (fstat (fileno(fp), &st))
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{
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log_error ("can't stat `%s': %s\n", fname, strerror (errno));
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fclose (fp);
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return NULL;
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}
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buflen = st.st_size;
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buf = xmalloc (buflen+1);
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if (fread (buf, buflen, 1, fp) != 1)
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{
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log_error ("error reading `%s': %s\n", fname, strerror (errno));
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fclose (fp);
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xfree (buf);
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return NULL;
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}
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fclose (fp);
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key = make_canonical (fname, buf, buflen);
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xfree (buf);
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return key;
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}
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static void
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read_and_protect (const char *fname)
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{
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int rc;
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unsigned char *key;
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unsigned char *result;
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size_t resultlen;
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key = read_key (fname);
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if (!key)
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return;
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rc = agent_protect (key, passphrase, &result, &resultlen);
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xfree (key);
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if (rc)
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{
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log_error ("protecting the key failed: %s\n", gnupg_strerror (rc));
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return;
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}
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if (opt_armor)
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{
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char *p = make_advanced (result, resultlen);
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xfree (result);
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if (!p)
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return;
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result = p;
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resultlen = strlen (p);
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}
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fwrite (result, resultlen, 1, stdout);
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xfree (result);
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}
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static void
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read_and_unprotect (const char *fname)
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{
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int rc;
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unsigned char *key;
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unsigned char *result;
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size_t resultlen;
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key = read_key (fname);
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if (!key)
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return;
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rc = agent_unprotect (key, passphrase, &result, &resultlen);
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xfree (key);
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if (rc)
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{
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log_error ("unprotecting the key failed: %s\n", gnupg_strerror (rc));
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return;
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}
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if (opt_armor)
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{
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char *p = make_advanced (result, resultlen);
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xfree (result);
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if (!p)
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return;
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result = p;
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resultlen = strlen (p);
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}
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fwrite (result, resultlen, 1, stdout);
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xfree (result);
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}
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static void
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read_and_shadow (const char *fname)
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{
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int rc;
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unsigned char *key;
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unsigned char *result;
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size_t resultlen;
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key = read_key (fname);
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if (!key)
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return;
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rc = agent_shadow_key (key, "(8:313233342:43)", &result);
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xfree (key);
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if (rc)
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{
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log_error ("shadowing the key failed: %s\n", gnupg_strerror (rc));
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return;
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}
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resultlen = gcry_sexp_canon_len (result, 0, NULL,NULL);
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assert (resultlen);
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if (opt_armor)
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{
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char *p = make_advanced (result, resultlen);
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xfree (result);
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if (!p)
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return;
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result = p;
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resultlen = strlen (p);
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}
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fwrite (result, resultlen, 1, stdout);
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xfree (result);
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}
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static void
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show_shadow_info (const char *fname)
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{
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int rc;
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unsigned char *key;
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const unsigned char *info;
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size_t infolen;
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key = read_key (fname);
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if (!key)
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return;
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rc = agent_get_shadow_info (key, &info);
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xfree (key);
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if (rc)
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{
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log_error ("get_shadow_info failed: %s\n", gnupg_strerror (rc));
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return;
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}
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infolen = gcry_sexp_canon_len (info, 0, NULL,NULL);
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assert (infolen);
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if (opt_armor)
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{
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char *p = make_advanced (info, infolen);
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if (!p)
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return;
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fwrite (p, strlen (p), 1, stdout);
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xfree (p);
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}
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else
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fwrite (info, infolen, 1, stdout);
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}
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static void
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show_file (const char *fname)
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{
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unsigned char *key;
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size_t keylen;
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char *p;
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key = read_key (fname);
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if (!key)
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return;
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keylen = gcry_sexp_canon_len (key, 0, NULL,NULL);
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assert (keylen);
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p = make_advanced (key, keylen);
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xfree (key);
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if (p)
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{
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fwrite (p, strlen (p), 1, stdout);
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xfree (p);
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}
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}
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static void
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show_keygrip (const char *fname)
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{
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unsigned char *key;
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GcrySexp private;
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unsigned char grip[20];
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int i;
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key = read_key (fname);
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if (!key)
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return;
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if (gcry_sexp_new (&private, key, 0, 0))
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{
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log_error ("gcry_sexp_new failed\n");
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return;
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}
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xfree (key);
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if (!gcry_pk_get_keygrip (private, grip))
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{
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log_error ("can't calculate keygrip\n");
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return;
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}
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gcry_sexp_release (private);
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for (i=0; i < 20; i++)
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printf ("%02X", grip[i]);
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putchar ('\n');
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}
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int
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main (int argc, char **argv )
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{
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ARGPARSE_ARGS pargs;
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int cmd = 0;
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set_strusage (my_strusage);
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gcry_control (GCRYCTL_SUSPEND_SECMEM_WARN);
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log_set_prefix ("protect-tool", 1);
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i18n_init ();
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if (!gcry_check_version ( "1.1.5" ) )
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{
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log_fatal( _("libgcrypt is too old (need %s, have %s)\n"),
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"1.1.5", gcry_check_version (NULL) );
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}
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gcry_set_log_handler (my_gcry_logger, NULL);
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gcry_control (GCRYCTL_INIT_SECMEM, 16384, 0);
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags= 1; /* do not remove the args */
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while (arg_parse (&pargs, opts) )
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{
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switch (pargs.r_opt)
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{
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case oVerbose: opt.verbose++; break;
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case oArmor: opt_armor=1; break;
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case oProtect: cmd = oProtect; break;
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case oUnprotect: cmd = oUnprotect; break;
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case oShadow: cmd = oShadow; break;
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case oShowShadowInfo: cmd = oShowShadowInfo; break;
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case oShowKeygrip: cmd = oShowKeygrip; break;
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case oPassphrase: passphrase = pargs.r.ret_str; break;
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default : pargs.err = 2; break;
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}
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}
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if (log_get_errorcount(0))
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exit(2);
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if (argc != 1)
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usage (1);
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if (cmd == oProtect)
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read_and_protect (*argv);
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else if (cmd == oUnprotect)
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read_and_unprotect (*argv);
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else if (cmd == oShadow)
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read_and_shadow (*argv);
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else if (cmd == oShowShadowInfo)
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show_shadow_info (*argv);
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else if (cmd == oShowKeygrip)
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show_keygrip (*argv);
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else
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show_file (*argv);
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return 0;
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}
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void
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agent_exit (int rc)
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{
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rc = rc? rc : log_get_errorcount(0)? 2 : 0;
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exit (rc);
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}
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