diff options
Diffstat (limited to '')
| -rw-r--r-- | agent/genkey.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/agent/genkey.c b/agent/genkey.c new file mode 100644 index 000000000..166f4605a --- /dev/null +++ b/agent/genkey.c @@ -0,0 +1,189 @@ +/* pksign.c - Generate a keypair + * Copyright (C) 2002 Free Software Foundation, Inc. + * + * This file is part of GnuPG. + * + * GnuPG is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * GnuPG is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#include <config.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <assert.h> +#include <unistd.h> +#include <sys/stat.h> + +#include "agent.h" + +static int +store_key (GCRY_SEXP private) +{ + int i; + char *fname; + FILE *fp; + char *buf; + size_t len; + unsigned char grip[20]; + char hexgrip[41]; + + if ( !gcry_pk_get_keygrip (private, grip) ) + { + log_error ("can't calculate keygrip\n"); + return seterr (General_Error); + } + for (i=0; i < 20; i++) + sprintf (hexgrip+2*i, "%02X", grip[i]); + hexgrip[40] = 0; + + fname = make_filename (opt.homedir, "private-keys-v1.d", hexgrip, NULL); + if (!access (fname, F_OK)) + { + log_error ("secret key file `%s' already exists - very strange\n", + fname); + xfree (fname); + return seterr (General_Error); + } + fp = fopen (fname, "wbx"); + if (!fp) + { + log_error ("can't create `%s': %s\n", fname, strerror (errno)); + xfree (fname); + return seterr (File_Create_Error); + } + + len = gcry_sexp_sprint (private, GCRYSEXP_FMT_CANON, NULL, 0); + assert (len); + buf = gcry_malloc_secure (len); + if (!buf) + { + fclose (fp); + remove (fname); + xfree (fname); + return seterr (Out_Of_Core); + } + len = gcry_sexp_sprint (private, GCRYSEXP_FMT_CANON, buf, len); + assert (len); + + if (fwrite (buf, len, 1, fp) != 1) + { + log_error ("error writing `%s': %s\n", fname, strerror (errno)); + fclose (fp); + remove (fname); + xfree (fname); + xfree (buf); + return seterr (File_Create_Error); + } + if ( fclose (fp) ) + { + log_error ("error closing `%s': %s\n", fname, strerror (errno)); + remove (fname); + xfree (fname); + xfree (buf); + return seterr (File_Create_Error); + } + + xfree (fname); + xfree (buf); + return 0; +} + + + +/* Generate a new keypair according to the parameters given in + KEYPARAM */ +int +agent_genkey (CTRL ctrl, const char *keyparam, size_t keyparamlen, + FILE *outfp) +{ + GCRY_SEXP s_keyparam, s_key, s_private, s_public; + int rc; + size_t len; + char *buf; + + rc = gcry_sexp_sscan (&s_keyparam, NULL, keyparam, keyparamlen); + if (rc) + { + log_error ("failed to convert keyparam: %s\n", gcry_strerror (rc)); + return seterr (Invalid_Data); + } + + /* fixme: Get the passphrase now, cause key generation may take a while */ + + rc = gcry_pk_genkey (&s_key, s_keyparam ); + gcry_sexp_release (s_keyparam); + if (rc) + { + log_error ("key generation failed: %s\n", gcry_strerror (rc)); + return map_gcry_err (rc); + } + + /* break out the parts */ + s_private = gcry_sexp_find_token (s_key, "private-key", 0); + if (!s_private) + { + log_error ("key generation failed: invalid return value\n"); + gcry_sexp_release (s_key); + return seterr (Invalid_Data); + } + s_public = gcry_sexp_find_token (s_key, "public-key", 0); + if (!s_public) + { + log_error ("key generation failed: invalid return value\n"); + gcry_sexp_release (s_private); + gcry_sexp_release (s_key); + return seterr (Invalid_Data); + } + gcry_sexp_release (s_key); s_key = NULL; + + /* store the secret key */ + log_debug ("storing private key\n"); + rc = store_key (s_private); + gcry_sexp_release (s_private); + if (rc) + { + gcry_sexp_release (s_public); + return rc; + } + + /* return the public key */ + log_debug ("returning public key\n"); + len = gcry_sexp_sprint (s_public, GCRYSEXP_FMT_CANON, NULL, 0); + assert (len); + buf = xmalloc (len); + if (!buf) + { + gcry_sexp_release (s_private); + gcry_sexp_release (s_public); + return seterr (Out_Of_Core); + } + len = gcry_sexp_sprint (s_public, GCRYSEXP_FMT_CANON, buf, len); + assert (len); + if (fwrite (buf, len, 1, outfp) != 1) + { + log_error ("error writing public key: %s\n", strerror (errno)); + gcry_sexp_release (s_private); + gcry_sexp_release (s_public); + xfree (buf); + return seterr (File_Create_Error); + } + gcry_sexp_release (s_public); + xfree (buf); + + return 0; +} + |