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-rw-r--r--agent/genkey.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/agent/genkey.c b/agent/genkey.c
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index 000000000..0a0577f17
--- /dev/null
+++ b/agent/genkey.c
@@ -0,0 +1,240 @@
+/* pksign.c - Generate a keypair
+ * Copyright (C) 2002, 2003 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 "agent.h"
+#include "i18n.h"
+
+static int
+store_key (gcry_sexp_t private, const char *passphrase, int force)
+{
+ int rc;
+ char *buf;
+ size_t len;
+ unsigned char grip[20];
+
+ if ( !gcry_pk_get_keygrip (private, grip) )
+ {
+ log_error ("can't calculate keygrip\n");
+ return gpg_error (GPG_ERR_GENERAL);
+ }
+
+ len = gcry_sexp_sprint (private, GCRYSEXP_FMT_CANON, NULL, 0);
+ assert (len);
+ buf = gcry_malloc_secure (len);
+ if (!buf)
+ return out_of_core ();
+ len = gcry_sexp_sprint (private, GCRYSEXP_FMT_CANON, buf, len);
+ assert (len);
+
+ if (passphrase)
+ {
+ unsigned char *p;
+
+ rc = agent_protect (buf, passphrase, &p, &len);
+ if (rc)
+ {
+ xfree (buf);
+ return rc;
+ }
+ xfree (buf);
+ buf = p;
+ }
+
+ rc = agent_write_private_key (grip, buf, len, force);
+ xfree (buf);
+ return rc;
+}
+
+/* Callback function to compare the first entered PIN with the one
+ currently being entered. */
+static int
+reenter_compare_cb (struct pin_entry_info_s *pi)
+{
+ const char *pin1 = pi->check_cb_arg;
+
+ if (!strcmp (pin1, pi->pin))
+ return 0; /* okay */
+ pi->cb_errtext = _("does not match - try again");
+ return -1;
+}
+
+
+
+/* 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_t s_keyparam, s_key, s_private, s_public;
+ struct pin_entry_info_s *pi, *pi2;
+ 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", gpg_strerror (rc));
+ return gpg_error (GPG_ERR_INV_DATA);
+ }
+
+ /* Get the passphrase now, cause key generation may take a while. */
+ {
+ const char *text1 = _("Please enter the passphrase to%0A"
+ "to protect your new key");
+ const char *text2 = _("Please re-enter this passphrase");
+
+ pi = gcry_calloc_secure (2, sizeof (*pi) + 100);
+ pi2 = pi + (sizeof *pi + 100);
+ pi->max_length = 100;
+ pi->max_tries = 3;
+ pi2->max_length = 100;
+ pi2->max_tries = 3;
+ pi2->check_cb = reenter_compare_cb;
+ pi2->check_cb_arg = pi->pin;
+
+ rc = agent_askpin (ctrl, text1, pi);
+ if (!rc)
+ rc = agent_askpin (ctrl, text2, pi2);
+ if (rc)
+ return rc;
+ if (!*pi->pin)
+ {
+ xfree (pi);
+ pi = NULL; /* User does not want a passphrase. */
+ }
+ }
+
+ rc = gcry_pk_genkey (&s_key, s_keyparam );
+ gcry_sexp_release (s_keyparam);
+ if (rc)
+ {
+ log_error ("key generation failed: %s\n", gpg_strerror (rc));
+ xfree (pi);
+ 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);
+ xfree (pi);
+ return gpg_error (GPG_ERR_INV_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);
+ xfree (pi);
+ return gpg_error (GPG_ERR_INV_DATA);
+ }
+ gcry_sexp_release (s_key); s_key = NULL;
+
+ /* store the secret key */
+ log_debug ("storing private key\n");
+ rc = store_key (s_private, pi? pi->pin:NULL, 0);
+ xfree (pi); pi = NULL;
+ 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 = xtrymalloc (len);
+ if (!buf)
+ {
+ gpg_error_t tmperr = out_of_core ();
+ gcry_sexp_release (s_private);
+ gcry_sexp_release (s_public);
+ return tmperr;
+ }
+ len = gcry_sexp_sprint (s_public, GCRYSEXP_FMT_CANON, buf, len);
+ assert (len);
+ if (fwrite (buf, len, 1, outfp) != 1)
+ {
+ gpg_error_t tmperr = gpg_error (gpg_err_code_from_errno (errno));
+ log_error ("error writing public key: %s\n", strerror (errno));
+ gcry_sexp_release (s_private);
+ gcry_sexp_release (s_public);
+ xfree (buf);
+ return tmperr;
+ }
+ gcry_sexp_release (s_public);
+ xfree (buf);
+
+ return 0;
+}
+
+
+
+/* Apply a new passpahrse to the key S_SKEY and store it. */
+int
+agent_protect_and_store (CTRL ctrl, gcry_sexp_t s_skey)
+{
+ struct pin_entry_info_s *pi, *pi2;
+ int rc;
+
+ {
+ const char *text1 = _("Please enter the new passphrase");
+ const char *text2 = _("Please re-enter this passphrase");
+
+ pi = gcry_calloc_secure (2, sizeof (*pi) + 100);
+ pi2 = pi + (sizeof *pi + 100);
+ pi->max_length = 100;
+ pi->max_tries = 3;
+ pi2->max_length = 100;
+ pi2->max_tries = 3;
+ pi2->check_cb = reenter_compare_cb;
+ pi2->check_cb_arg = pi->pin;
+
+ rc = agent_askpin (ctrl, text1, pi);
+ if (!rc)
+ rc = agent_askpin (ctrl, text2, pi2);
+ if (rc)
+ return rc;
+ if (!*pi->pin)
+ {
+ xfree (pi);
+ pi = NULL; /* User does not want a passphrase. */
+ }
+ }
+
+ rc = store_key (s_skey, pi? pi->pin:NULL, 1);
+ xfree (pi);
+ return 0;
+}
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