partial DSA support

1 files changed, 87 insertions, 0 deletions

diff --git a/g10/verify.c b/g10/verify.c
new file mode 100644
index 000000000..3398c2ed4
--- /dev/null
+++ b/g10/verify.c
@@ -0,0 +1,87 @@
+/* verify.c - verify signed data
+ *	Copyright (C) 1998 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "options.h"
+#include "packet.h"
+#include "errors.h"
+#include "iobuf.h"
+#include "keydb.h"
+#include "memory.h"
+#include "util.h"
+#include "main.h"
+#include "filter.h"
+#include "ttyio.h"
+#include "i18n.h"
+
+
+
+/****************
+ * Assume that the input is a signature and verify it without
+ * generating any output.  With no arguments, the sigature packet
+ * is read from stdin (it may be a detached signature when not
+ * used in batch mode). If only a sigfile is given, is maybe a complete
+ * signature or a detached signature in which case the signed stuff
+ * is expected from stdin. With more than 1 argument, the first should
+ * be a detached signature and the remaining files are the signed stuff.
+ */
+
+int
+verify_signatures( int nfiles, char **files )
+{
+    IOBUF fp;
+    armor_filter_context_t afx;
+    const char *sigfile;
+    int i, rc;
+    STRLIST sl;
+
+    sigfile = nfiles? *files : NULL;
+
+    /* open the signature file */
+    fp = iobuf_open(sigfile);
+    if( !fp ) {
+	log_error(_("can't open '%s'\n"), print_fname_stdin(sigfile));
+	return G10ERR_OPEN_FILE;
+    }
+
+    if( !opt.no_armor ) {
+	if( use_armor_filter( fp ) ) {
+	    memset( &afx, 0, sizeof afx);
+	    iobuf_push_filter( fp, armor_filter, &afx );
+	}
+    }
+
+    sl = NULL;
+    for(i=1 ; i < nfiles; i++ )
+	add_to_strlist( &sl, files[i] );
+    rc = proc_signature_packets( fp, sl );
+    free_strlist(sl);
+    iobuf_close(fp);
+    return rc;
+}
+
+
+