Add libotr/etc sources

1 files changed, 174 insertions, 0 deletions

diff --git a/libotr/libotr-4.1.1/src/proto.h b/libotr/libotr-4.1.1/src/proto.h
new file mode 100644
index 0000000..28be83f
--- /dev/null
+++ b/libotr/libotr-4.1.1/src/proto.h
@@ -0,0 +1,174 @@
+/*
+ *  Off-the-Record Messaging library
+ *  Copyright (C) 2004-2012  Ian Goldberg, Rob Smits, Chris Alexander,
+ *  			      Willy Lew, Lisa Du, Nikita Borisov
+ *                           <otr@cypherpunks.ca>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of version 2.1 of the GNU Lesser General
+ *  Public License as published by the Free Software Foundation.
+ *
+ *  This library 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 library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __PROTO_H__
+#define __PROTO_H__
+
+#include "context.h"
+#include "version.h"
+#include "tlv.h"
+
+/* If we ever see this sequence in a plaintext message, we'll assume the
+ * other side speaks OTR, and try to establish a connection. */
+#define OTRL_MESSAGE_TAG_BASE " \t  \t\t\t\t \t \t \t  "
+/* The following must each be of length 8 */
+#define OTRL_MESSAGE_TAG_V1 " \t \t  \t "
+#define OTRL_MESSAGE_TAG_V2 "  \t\t  \t "
+#define OTRL_MESSAGE_TAG_V3 "  \t\t  \t\t"
+
+/* The possible flags contained in a Data Message */
+#define OTRL_MSGFLAGS_IGNORE_UNREADABLE		0x01
+
+typedef unsigned int OtrlPolicy;
+
+#define OTRL_POLICY_ALLOW_V1			0x01
+#define OTRL_POLICY_ALLOW_V2			0x02
+#define OTRL_POLICY_ALLOW_V3			0x04
+#define OTRL_POLICY_REQUIRE_ENCRYPTION		0x08
+#define OTRL_POLICY_SEND_WHITESPACE_TAG		0x10
+#define OTRL_POLICY_WHITESPACE_START_AKE	0x20
+#define OTRL_POLICY_ERROR_START_AKE		0x40
+
+#define OTRL_POLICY_VERSION_MASK (OTRL_POLICY_ALLOW_V1 | OTRL_POLICY_ALLOW_V2 |\
+	OTRL_POLICY_ALLOW_V3)
+
+/* Length of OTR message headers */
+#define OTRL_HEADER_LEN		3
+#define OTRL_B64_HEADER_LEN	4
+
+/* Analogous to v1 policies */
+#define OTRL_POLICY_NEVER			0x00
+#define OTRL_POLICY_OPPORTUNISTIC \
+	    ( OTRL_POLICY_ALLOW_V2 | \
+	    OTRL_POLICY_ALLOW_V3 | \
+	    OTRL_POLICY_SEND_WHITESPACE_TAG | \
+	    OTRL_POLICY_WHITESPACE_START_AKE | \
+	    OTRL_POLICY_ERROR_START_AKE )
+#define OTRL_POLICY_MANUAL \
+	    ( OTRL_POLICY_ALLOW_V2 | \
+	    OTRL_POLICY_ALLOW_V3)
+#define OTRL_POLICY_ALWAYS \
+	    ( OTRL_POLICY_ALLOW_V2 | \
+	    OTRL_POLICY_ALLOW_V3 | \
+	    OTRL_POLICY_REQUIRE_ENCRYPTION | \
+	    OTRL_POLICY_WHITESPACE_START_AKE | \
+	    OTRL_POLICY_ERROR_START_AKE )
+#define OTRL_POLICY_DEFAULT OTRL_POLICY_OPPORTUNISTIC
+
+typedef enum {
+    OTRL_MSGTYPE_NOTOTR,
+    OTRL_MSGTYPE_TAGGEDPLAINTEXT,
+    OTRL_MSGTYPE_QUERY,
+    OTRL_MSGTYPE_DH_COMMIT,
+    OTRL_MSGTYPE_DH_KEY,
+    OTRL_MSGTYPE_REVEALSIG,
+    OTRL_MSGTYPE_SIGNATURE,
+    OTRL_MSGTYPE_V1_KEYEXCH,
+    OTRL_MSGTYPE_DATA,
+    OTRL_MSGTYPE_ERROR,
+    OTRL_MSGTYPE_UNKNOWN
+} OtrlMessageType;
+
+typedef enum {
+    OTRL_FRAGMENT_UNFRAGMENTED,
+    OTRL_FRAGMENT_INCOMPLETE,
+    OTRL_FRAGMENT_COMPLETE
+} OtrlFragmentResult;
+
+typedef enum {
+    OTRL_FRAGMENT_SEND_SKIP, /* Return new message back to caller,
+			      * but don't inject. */
+    OTRL_FRAGMENT_SEND_ALL,
+    OTRL_FRAGMENT_SEND_ALL_BUT_FIRST,
+    OTRL_FRAGMENT_SEND_ALL_BUT_LAST
+} OtrlFragmentPolicy;
+
+/* Initialize the OTR library.  Pass the version of the API you are
+ * using. */
+gcry_error_t otrl_init(unsigned int ver_major, unsigned int ver_minor,
+	unsigned int ver_sub);
+
+/* Shortcut */
+#define OTRL_INIT do { \
+	if (otrl_init(OTRL_VERSION_MAJOR, OTRL_VERSION_MINOR, \
+		OTRL_VERSION_SUB)) { \
+	    exit(1); \
+	} \
+    } while(0)
+
+/* Return a pointer to a static string containing the version number of
+ * the OTR library. */
+const char *otrl_version(void);
+
+/* Return a pointer to a newly-allocated OTR query message, customized
+ * with our name.  The caller should free() the result when he's done
+ * with it. */
+char *otrl_proto_default_query_msg(const char *ourname, OtrlPolicy policy);
+
+/* Return the best version of OTR support by both sides, given an OTR
+ * Query Message and the local policy. */
+unsigned int otrl_proto_query_bestversion(const char *querymsg,
+	OtrlPolicy policy);
+
+/* Locate any whitespace tag in this message, and return the best
+ * version of OTR support on both sides.  Set *starttagp and *endtagp to
+ * the start and end of the located tag, so that it can be snipped out. */
+unsigned int otrl_proto_whitespace_bestversion(const char *msg,
+	const char **starttagp, const char **endtagp, OtrlPolicy policy);
+
+/* Find the message type. */
+OtrlMessageType otrl_proto_message_type(const char *message);
+
+/* Find the message version. */
+int otrl_proto_message_version(const char *message);
+
+/* Find the instance tags in this message. */
+gcry_error_t otrl_proto_instance(const char *otrmsg,
+	unsigned int *instance_from, unsigned int *instance_to);
+
+/* Create an OTR Data message.  Pass the plaintext as msg, and an
+ * optional chain of TLVs.  A newly-allocated string will be returned in
+ * *encmessagep. Put the current extra symmetric key into extrakey
+ * (if non-NULL). */
+gcry_error_t otrl_proto_create_data(char **encmessagep, ConnContext *context,
+	const char *msg, const OtrlTLV *tlvs, unsigned char flags,
+	unsigned char *extrakey);
+
+/* Extract the flags from an otherwise unreadable Data Message. */
+gcry_error_t otrl_proto_data_read_flags(const char *datamsg,
+	unsigned char *flagsp);
+
+/* Accept an OTR Data Message in datamsg.  Decrypt it and put the
+ * plaintext into *plaintextp, and any TLVs into tlvsp.  Put any
+ * received flags into *flagsp (if non-NULL).  Put the current extra
+ * symmetric key into extrakey (if non-NULL). */
+gcry_error_t otrl_proto_accept_data(char **plaintextp, OtrlTLV **tlvsp,
+	ConnContext *context, const char *datamsg, unsigned char *flagsp,
+	unsigned char *extrakey);
+
+/* Accumulate a potential fragment into the current context. */
+OtrlFragmentResult otrl_proto_fragment_accumulate(char **unfragmessagep,
+	ConnContext *context, const char *msg);
+
+gcry_error_t otrl_proto_fragment_create(int mms, int fragment_count,
+	char ***fragments, ConnContext *context, const char *message);
+
+void otrl_proto_fragment_free(char ***fragments, unsigned short arraylen);
+#endif