Add function gpgme_data_identify.

* src/gpgme.h.in (gpgme_data_type_t): New.
(gpgme_data_identify): New prototype.
* src/data-identify.c: New.
* src/parsetlv.c, src/parsetlv.h: New.  Take from gpa.
* src/libgpgme.vers, src/gpgme.def: Add gpgme_data_identify.
* src/gpgme-tool.c (status): Add STATUS_IDENTIFY_RESULT.
(gt_identify): New.
(cmd_identify): New.

(hlp_passwd): Move close to cmd_passwd.
--

It is often useful to have a way to identify the data which needs
processing.  This is such a common task that it makes sense to
implement this in gpgme to avoid diverging implementations.

1 files changed, 48 insertions, 0 deletions

diff --git a/src/parsetlv.h b/src/parsetlv.h
new file mode 100644
index 00000000..153073c1
--- /dev/null
+++ b/src/parsetlv.h
@@ -0,0 +1,48 @@
+/* parsetlv.h -  TLV functions defintions
+ * Copyright (C) 2012 g10 Code GmbH
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This file 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PARSETLV_H
+#define PARSETLV_H
+
+/* ASN.1 constants.  */
+#define ASN1_CLASS_UNIVERSAL   0
+#define ASN1_CLASS_APPLICATION 1
+#define ASN1_CLASS_CONTEXT     2
+#define ASN1_CLASS_PRIVATE     3
+#define ASN1_TAG_INTEGER       2
+#define ASN1_TAG_OBJECT_ID     6
+#define ASN1_TAG_SEQUENCE     16
+
+
+/* Object used with parse_tlv.  */
+struct tlvinfo_s
+{
+  int cls;            /* The class of the tag.  */
+  int tag;            /* The tag.  */
+  int is_cons;        /* True if it is a constructed object.  */
+  int is_ndef;        /* True if the object has an indefinite length.  */
+  size_t length;      /* The length of the value.  */
+  size_t nhdr;        /* The number of octets in the header (tag,length). */
+};
+typedef struct tlvinfo_s tlvinfo_t;
+
+/*-- parsetlv.c --*/
+int _gpgme_parse_tlv (char const **buffer, size_t *size, tlvinfo_t *ti);
+#define parse_tlv(a,b,c) _gpgme_parse_tlv ((a), (b), (c))
+
+
+#endif /*PARSETLV_H*/