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git://git.gnupg.org/gnupg.git
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190 lines
4.8 KiB
C
190 lines
4.8 KiB
C
/* pksign.c - Generate a keypair
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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 <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <assert.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "agent.h"
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static int
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store_key (GCRY_SEXP private)
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{
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int i;
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char *fname;
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FILE *fp;
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char *buf;
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size_t len;
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unsigned char grip[20];
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char hexgrip[41];
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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 seterr (General_Error);
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}
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for (i=0; i < 20; i++)
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sprintf (hexgrip+2*i, "%02X", grip[i]);
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hexgrip[40] = 0;
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fname = make_filename (opt.homedir, "private-keys-v1.d", hexgrip, NULL);
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if (!access (fname, F_OK))
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{
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log_error ("secret key file `%s' already exists - very strange\n",
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fname);
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xfree (fname);
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return seterr (General_Error);
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}
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fp = fopen (fname, "wbx");
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if (!fp)
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{
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log_error ("can't create `%s': %s\n", fname, strerror (errno));
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xfree (fname);
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return seterr (File_Create_Error);
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}
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len = gcry_sexp_sprint (private, GCRYSEXP_FMT_CANON, NULL, 0);
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assert (len);
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buf = gcry_malloc_secure (len);
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if (!buf)
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{
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fclose (fp);
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remove (fname);
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xfree (fname);
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return seterr (Out_Of_Core);
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}
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len = gcry_sexp_sprint (private, GCRYSEXP_FMT_CANON, buf, len);
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assert (len);
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if (fwrite (buf, len, 1, fp) != 1)
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{
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log_error ("error writing `%s': %s\n", fname, strerror (errno));
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fclose (fp);
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remove (fname);
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xfree (fname);
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xfree (buf);
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return seterr (File_Create_Error);
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}
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if ( fclose (fp) )
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{
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log_error ("error closing `%s': %s\n", fname, strerror (errno));
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remove (fname);
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xfree (fname);
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xfree (buf);
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return seterr (File_Create_Error);
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}
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xfree (fname);
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xfree (buf);
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return 0;
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}
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/* Generate a new keypair according to the parameters given in
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KEYPARAM */
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int
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agent_genkey (CTRL ctrl, const char *keyparam, size_t keyparamlen,
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FILE *outfp)
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{
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GCRY_SEXP s_keyparam, s_key, s_private, s_public;
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int rc;
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size_t len;
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char *buf;
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rc = gcry_sexp_sscan (&s_keyparam, NULL, keyparam, keyparamlen);
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if (rc)
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{
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log_error ("failed to convert keyparam: %s\n", gcry_strerror (rc));
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return seterr (Invalid_Data);
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}
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/* fixme: Get the passphrase now, cause key generation may take a while */
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rc = gcry_pk_genkey (&s_key, s_keyparam );
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gcry_sexp_release (s_keyparam);
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if (rc)
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{
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log_error ("key generation failed: %s\n", gcry_strerror (rc));
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return map_gcry_err (rc);
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}
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/* break out the parts */
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s_private = gcry_sexp_find_token (s_key, "private-key", 0);
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if (!s_private)
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{
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log_error ("key generation failed: invalid return value\n");
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gcry_sexp_release (s_key);
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return seterr (Invalid_Data);
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}
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s_public = gcry_sexp_find_token (s_key, "public-key", 0);
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if (!s_public)
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{
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log_error ("key generation failed: invalid return value\n");
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gcry_sexp_release (s_private);
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gcry_sexp_release (s_key);
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return seterr (Invalid_Data);
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}
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gcry_sexp_release (s_key); s_key = NULL;
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/* store the secret key */
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log_debug ("storing private key\n");
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rc = store_key (s_private);
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gcry_sexp_release (s_private);
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if (rc)
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{
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gcry_sexp_release (s_public);
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return rc;
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}
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/* return the public key */
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log_debug ("returning public key\n");
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len = gcry_sexp_sprint (s_public, GCRYSEXP_FMT_CANON, NULL, 0);
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assert (len);
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buf = xmalloc (len);
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if (!buf)
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{
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gcry_sexp_release (s_private);
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gcry_sexp_release (s_public);
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return seterr (Out_Of_Core);
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}
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len = gcry_sexp_sprint (s_public, GCRYSEXP_FMT_CANON, buf, len);
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assert (len);
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if (fwrite (buf, len, 1, outfp) != 1)
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{
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log_error ("error writing public key: %s\n", strerror (errno));
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gcry_sexp_release (s_private);
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gcry_sexp_release (s_public);
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xfree (buf);
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return seterr (File_Create_Error);
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}
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gcry_sexp_release (s_public);
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xfree (buf);
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return 0;
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}
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