pidgin/pidgin

ntlm: Move to simple prpl

2017-06-04, Mike Ruprecht
28720be5c477
Parents ec094adb20e3
Children ff4278a29875
ntlm: Move to simple prpl

Now that the only user of the remaining ntlm functions is the simple
prpl, it can be moved into the prpl itself. This further simplifies
libpurple and makes it possible to have future third-party encryption
dependencies only in plugins rather than the core.
--- a/ChangeLog.API Sun Jun 04 21:36:19 2017 -0500
+++ b/ChangeLog.API Sun Jun 04 21:36:37 2017 -0500
@@ -462,6 +462,7 @@
* purple_notify_searchresults_get_columns_count
* purple_notify_searchresults_get_rows_count
* purple_notify_searchresults_row_get
+ * purple_ntlm_*
* PurplePluginType
* PurplePluginPriority
* PurplePluginLoaderInfo
--- a/doc/reference/libpurple/libpurple-docs.xml Sun Jun 04 21:36:19 2017 -0500
+++ b/doc/reference/libpurple/libpurple-docs.xml Sun Jun 04 21:36:37 2017 -0500
@@ -59,7 +59,6 @@
<xi:include href="xml/nat-pmp.xml" />
<xi:include href="xml/network.xml" />
<xi:include href="xml/notify.xml" />
- <xi:include href="xml/ntlm.xml" />
<xi:include href="xml/plugins.xml" />
<xi:include href="xml/prefs.xml" />
<xi:include href="xml/pluginpref.xml" />
--- a/libpurple/Makefile.am Sun Jun 04 21:36:19 2017 -0500
+++ b/libpurple/Makefile.am Sun Jun 04 21:36:37 2017 -0500
@@ -79,7 +79,6 @@
mime.c \
nat-pmp.c \
network.c \
- ntlm.c \
notify.c \
plugins.c \
pluginpref.c \
@@ -164,7 +163,6 @@
nat-pmp.h \
network.h \
notify.h \
- ntlm.h \
plugins.h \
pluginpref.h \
pounce.h \
--- a/libpurple/Makefile.mingw Sun Jun 04 21:36:19 2017 -0500
+++ b/libpurple/Makefile.mingw Sun Jun 04 21:36:37 2017 -0500
@@ -102,7 +102,6 @@
nat-pmp.c \
network.c \
notify.c \
- ntlm.c \
plugins.c \
pluginpref.c \
pounce.c \
--- a/libpurple/ntlm.c Sun Jun 04 21:36:19 2017 -0500
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,347 +0,0 @@
-/* purple
- *
- * Copyright (C) 2005 Thomas Butter <butter@uni-mannheim.de>
- *
- * hashing done according to description of NTLM on
- * http://www.innovation.ch/java/ntlm.html
- *
- * This program 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.
- *
- * This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
- */
-
-#include "internal.h"
-
-#include "util.h"
-#include "ntlm.h"
-#include "debug.h"
-
-#include "ciphers/descipher.h"
-#include "ciphers/md4hash.h"
-
-#include <string.h>
-
-#define NTLM_NEGOTIATE_NTLM2_KEY 0x00080000
-
-struct type2_message {
- guint8 protocol[8]; /* 'N', 'T', 'L', 'M', 'S', 'S', 'P', '\0'*/
- guint32 type; /* 0x00000002 */
-
- guint32 zero;
- guint16 msg_len1; /* target name length */
- guint16 msg_len2; /* target name length */
-
- guint32 flags; /* 0x00008201 */
-
- guint8 nonce[8]; /* nonce */
- guint8 context[8];
-};
-
-struct type3_message {
- guint8 protocol[8]; /* 'N', 'T', 'L', 'M', 'S', 'S', 'P', '\0'*/
- guint32 type; /* 0x00000003 */
-
- guint16 lm_resp_len1; /* LanManager response length (always 0x18)*/
- guint16 lm_resp_len2; /* LanManager response length (always 0x18)*/
- guint32 lm_resp_off; /* LanManager response offset */
-
- guint16 nt_resp_len1; /* NT response length (always 0x18) */
- guint16 nt_resp_len2; /* NT response length (always 0x18) */
- guint32 nt_resp_off; /* NT response offset */
-
- guint16 dom_len1; /* domain string length */
- guint16 dom_len2; /* domain string length */
- guint32 dom_off; /* domain string offset (always 0x00000040) */
-
- guint16 user_len1; /* username string length */
- guint16 user_len2; /* username string length */
- guint32 user_off; /* username string offset */
-
- guint16 host_len1; /* host string length */
- guint16 host_len2; /* host string length */
- guint32 host_off; /* host string offset */
-
- guint16 sess_len1;
- guint16 sess_len2;
- guint32 sess_off; /* message length */
-
- guint32 flags; /* 0x00008201 */
- /* guint32 flags2; */ /* unknown, used in windows messenger */
- /* guint32 flags3; */
-
-#if 0
- guint8 dom[*]; /* domain string (unicode UTF-16LE) */
- guint8 user[*]; /* username string (unicode UTF-16LE) */
- guint8 host[*]; /* host string (unicode UTF-16LE) */
- guint8 lm_resp[*]; /* LanManager response */
- guint8 nt_resp[*]; /* NT response */
-#endif
-};
-
-guint8 *
-purple_ntlm_parse_type2(const gchar *type2, guint32 *flags)
-{
- gsize retlen;
- guchar *buff;
- struct type2_message tmsg;
- static guint8 nonce[8];
-
- buff = g_base64_decode(type2, &retlen);
-
- if (buff != NULL && retlen >= (sizeof(struct type2_message) - 1)) {
- memcpy(&tmsg, buff, MIN(retlen, sizeof(tmsg)));
- memcpy(nonce, tmsg.nonce, 8);
- if (flags != NULL)
- *flags = GUINT16_FROM_LE(tmsg.flags);
- } else {
- purple_debug_error("ntlm", "Unable to parse type2 message - returning empty nonce.\n");
- memset(nonce, 0, 8);
- }
- g_free(buff);
-
- return nonce;
-}
-
-/*
- * Create a 64bit DES key by taking a 56bit key and adding
- * a parity bit after every 7th bit.
- */
-static void
-setup_des_key(const guint8 key_56[], guint8 *key)
-{
- key[0] = key_56[0];
- key[1] = ((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1);
- key[2] = ((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2);
- key[3] = ((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3);
- key[4] = ((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4);
- key[5] = ((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5);
- key[6] = ((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6);
- key[7] = (key_56[6] << 1) & 0xFF;
-}
-
-/*
- * helper function for purple cipher.c
- */
-static void
-des_ecb_encrypt(const guint8 *plaintext, guint8 *result, const guint8 *key)
-{
- PurpleCipher *cipher;
- gssize encsiz;
-
- cipher = purple_des_cipher_new();
- purple_cipher_set_key(cipher, key, 8);
- encsiz = purple_cipher_encrypt(cipher, plaintext, 8, result, 8);
- g_warn_if_fail(encsiz == 8);
- g_object_unref(cipher);
-}
-
-/*
- * takes a 21 byte array and treats it as 3 56-bit DES keys. The
- * 8 byte plaintext is encrypted with each key and the resulting 24
- * bytes are stored in the results array.
- */
-static void
-calc_resp(guint8 *keys, const guint8 *plaintext, unsigned char *results)
-{
- guint8 key[8];
- setup_des_key(keys, key);
- des_ecb_encrypt(plaintext, results, key);
-
- setup_des_key(keys + 7, key);
- des_ecb_encrypt(plaintext, results + 8, key);
-
- setup_des_key(keys + 14, key);
- des_ecb_encrypt(plaintext, results + 16, key);
-}
-
-/*
- * TODO: We think we should be using cryptographically secure random numbers
- * here. We think the rand() function is probably bad. We think
- * /dev/urandom is a step up, but using a random function from an SSL
- * library would probably be best. In Windows we could possibly also
- * use CryptGenRandom.
- */
-static void
-gensesskey(char *buffer)
-{
- int fd;
- int i;
- ssize_t red = 0;
-
- fd = open("/dev/urandom", O_RDONLY);
- if (fd >= 0) {
- red = read(fd, buffer, 16);
- if (red < 0) {
- purple_debug_warning("ntlm", "Error reading from /dev/urandom: %s."
- " Falling back to inferior method.\n", g_strerror(errno));
- red = 0;
- } else if (red < 16) {
- purple_debug_warning("ntlm", "Tried reading 16 bytes from "
- "/dev/urandom but only got %"
- G_GSSIZE_FORMAT ". Falling back to "
- "inferior method\n", (gssize)red);
- }
- close(fd);
- } else {
- purple_debug_warning("ntlm", "Error opening /dev/urandom: %s."
- " Falling back to inferior method.\n", g_strerror(errno));
- }
-
- for (i = red; i < 16; i++) {
- buffer[i] = (char)(g_random_int() & 0xff);
- }
-}
-
-gchar *
-purple_ntlm_gen_type3(const gchar *username, const gchar *passw, const gchar *hostname, const gchar *domain, const guint8 *nonce, guint32 *flags)
-{
- char lm_pw[14];
- unsigned char lm_hpw[21];
- char sesskey[16];
- guint8 key[8];
- int domainlen;
- int usernamelen;
- int hostnamelen;
- int msglen;
- struct type3_message *tmsg;
- int passwlen, lennt;
- unsigned char lm_resp[24], nt_resp[24];
- unsigned char magic[] = { 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 };
- unsigned char nt_hpw[21];
- char nt_pw[128];
- PurpleHash *hash;
- char *tmp;
- int idx;
- gchar *ucs2le;
-
- domainlen = strlen(domain) * 2;
- usernamelen = strlen(username) * 2;
- hostnamelen = strlen(hostname) * 2;
- msglen = sizeof(struct type3_message) + domainlen +
- usernamelen + hostnamelen + 0x18 + 0x18 + ((flags) ? 0x10 : 0);
- tmsg = g_malloc0(msglen);
- passwlen = strlen(passw);
-
- /* type3 message initialization */
- tmsg->protocol[0] = 'N';
- tmsg->protocol[1] = 'T';
- tmsg->protocol[2] = 'L';
- tmsg->protocol[3] = 'M';
- tmsg->protocol[4] = 'S';
- tmsg->protocol[5] = 'S';
- tmsg->protocol[6] = 'P';
- tmsg->type = GUINT32_TO_LE(0x00000003);
- tmsg->lm_resp_len1 = tmsg->lm_resp_len2 = GUINT16_TO_LE(0x18);
- tmsg->lm_resp_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen + usernamelen + hostnamelen);
- tmsg->nt_resp_len1 = tmsg->nt_resp_len2 = GUINT16_TO_LE(0x18);
- tmsg->nt_resp_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen + usernamelen + hostnamelen + 0x18);
-
- tmsg->dom_len1 = tmsg->dom_len2 = GUINT16_TO_LE(domainlen);
- tmsg->dom_off = GUINT32_TO_LE(sizeof(struct type3_message));
-
- tmsg->user_len1 = tmsg->user_len2 = GUINT16_TO_LE(usernamelen);
- tmsg->user_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen);
-
- tmsg->host_len1 = tmsg->host_len2 = GUINT16_TO_LE(hostnamelen);
- tmsg->host_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen + usernamelen);
-
- if(flags) {
- tmsg->sess_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen + usernamelen + hostnamelen + 0x18 + 0x18);
- tmsg->sess_len1 = tmsg->sess_len2 = GUINT16_TO_LE(0x0010);
- }
-
- tmsg->flags = GUINT32_TO_LE(0x00008201);
-
- tmp = (char *)tmsg + sizeof(struct type3_message);
-
- ucs2le = g_convert(domain, -1, "UTF-16LE", "UTF-8", NULL, NULL, NULL);
- if (ucs2le != NULL) {
- memcpy(tmp, ucs2le, domainlen);
- g_free(ucs2le);
- tmp += domainlen;
- } else {
- purple_debug_info("ntlm", "Unable to encode domain in UTF-16LE.\n");
- }
-
- ucs2le = g_convert(username, -1, "UTF-16LE", "UTF-8", NULL, NULL, NULL);
- if (ucs2le != NULL) {
- memcpy(tmp, ucs2le, usernamelen);
- g_free(ucs2le);
- tmp += usernamelen;
- } else {
- purple_debug_info("ntlm", "Unable to encode username in UTF-16LE.\n");
- }
-
- ucs2le = g_convert(hostname, -1, "UTF-16LE", "UTF-8", NULL, NULL, NULL);
- if (ucs2le != NULL) {
- memcpy(tmp, ucs2le, hostnamelen);
- g_free(ucs2le);
- tmp += hostnamelen;
- } else {
- purple_debug_info("ntlm", "Unable to encode hostname in UTF-16LE.\n");
- }
-
- /* LM */
- if (passwlen > 14)
- passwlen = 14;
-
- for (idx = 0; idx < passwlen; idx++)
- lm_pw[idx] = g_ascii_toupper(passw[idx]);
- for (; idx < 14; idx++)
- lm_pw[idx] = 0;
-
- setup_des_key((unsigned char*)lm_pw, key);
- des_ecb_encrypt(magic, lm_hpw, key);
-
- setup_des_key((unsigned char*)(lm_pw + 7), key);
- des_ecb_encrypt(magic, lm_hpw + 8, key);
-
- memset(lm_hpw + 16, 0, 5);
- calc_resp(lm_hpw, nonce, lm_resp);
- memcpy(tmp, lm_resp, 0x18);
- tmp += 0x18;
-
- /* NTLM */
- /* Convert the password to UTF-16LE */
- lennt = strlen(passw);
- for (idx = 0; idx < lennt; idx++)
- {
- nt_pw[2 * idx] = passw[idx];
- nt_pw[2 * idx + 1] = 0;
- }
-
- hash = purple_md4_hash_new();
- purple_hash_append(hash, (guint8 *)nt_pw, 2 * lennt);
- purple_hash_digest(hash, nt_hpw, sizeof(nt_hpw));
- g_object_unref(hash);
-
- memset(nt_hpw + 16, 0, 5);
- calc_resp(nt_hpw, nonce, nt_resp);
- memcpy(tmp, nt_resp, 0x18);
- tmp += 0x18;
-
- /* LCS Stuff */
- if (flags) {
- tmsg->flags = GUINT32_TO_LE(0x409082d4);
- gensesskey(sesskey);
- memcpy(tmp, sesskey, 0x10);
- }
-
- /*tmsg->flags2 = 0x0a280105;
- tmsg->flags3 = 0x0f000000;*/
-
- tmp = g_base64_encode((guchar *)tmsg, msglen);
- g_free(tmsg);
-
- return tmp;
-}
--- a/libpurple/ntlm.h Sun Jun 04 21:36:19 2017 -0500
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,64 +0,0 @@
-/* purple
- *
- * Copyright (C) 2005, Thomas Butter <butter@uni-mannheim.de>
- *
- * ntlm structs are taken from NTLM description on
- * http://www.innovation.ch/java/ntlm.html
- *
- * This program 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.
- *
- * This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
- */
-
-#ifndef _PURPLE_NTLM_H
-#define _PURPLE_NTLM_H
-/**
- * SECTION:ntlm
- * @section_id: libpurple-ntlm
- * @short_description: <filename>ntlm.h</filename>
- * @title: NTLM Authentication
- */
-
-G_BEGIN_DECLS
-
-/**
- * purple_ntlm_parse_type2:
- * @type2: String containing the base64 encoded type2 message
- * @flags: If not %NULL, this will store the flags for the message
- *
- * Parses the ntlm type 2 message
- *
- * Returns: The nonce for use in message type3. This is a statically
- * allocated 8 byte binary string.
- */
-guint8 *purple_ntlm_parse_type2(const gchar *type2, guint32 *flags);
-
-/**
- * purple_ntlm_gen_type3:
- * @username: The username
- * @passw: The password
- * @hostname: The hostname
- * @domain: The domain to authenticate against
- * @nonce: The nonce returned by purple_ntlm_parse_type2
- * @flags: Pointer to the flags returned by purple_ntlm_parse_type2
- *
- * Generates a type3 message
- *
- * Returns: A base64 encoded type3 message. This should be g_free'd by
- * the caller.
- */
-gchar *purple_ntlm_gen_type3(const gchar *username, const gchar *passw, const gchar *hostname, const gchar *domain, const guint8 *nonce, guint32 *flags);
-
-G_END_DECLS
-
-#endif /* _PURPLE_NTLM_H */
--- a/libpurple/protocols/simple/Makefile.am Sun Jun 04 21:36:19 2017 -0500
+++ b/libpurple/protocols/simple/Makefile.am Sun Jun 04 21:36:37 2017 -0500
@@ -4,6 +4,8 @@
pkgdir = @PURPLE_PLUGINDIR@
SIMPLESOURCES = \
+ ntlm.c \
+ ntlm.h \
simple.c \
simple.h \
sipmsg.c \
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/libpurple/protocols/simple/ntlm.c Sun Jun 04 21:36:37 2017 -0500
@@ -0,0 +1,347 @@
+/* purple
+ *
+ * Copyright (C) 2005 Thomas Butter <butter@uni-mannheim.de>
+ *
+ * hashing done according to description of NTLM on
+ * http://www.innovation.ch/java/ntlm.html
+ *
+ * This program 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.
+ *
+ * This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
+ */
+
+#include "internal.h"
+
+#include "util.h"
+#include "ntlm.h"
+#include "debug.h"
+
+#include "ciphers/descipher.h"
+#include "ciphers/md4hash.h"
+
+#include <string.h>
+
+#define NTLM_NEGOTIATE_NTLM2_KEY 0x00080000
+
+struct type2_message {
+ guint8 protocol[8]; /* 'N', 'T', 'L', 'M', 'S', 'S', 'P', '\0'*/
+ guint32 type; /* 0x00000002 */
+
+ guint32 zero;
+ guint16 msg_len1; /* target name length */
+ guint16 msg_len2; /* target name length */
+
+ guint32 flags; /* 0x00008201 */
+
+ guint8 nonce[8]; /* nonce */
+ guint8 context[8];
+};
+
+struct type3_message {
+ guint8 protocol[8]; /* 'N', 'T', 'L', 'M', 'S', 'S', 'P', '\0'*/
+ guint32 type; /* 0x00000003 */
+
+ guint16 lm_resp_len1; /* LanManager response length (always 0x18)*/
+ guint16 lm_resp_len2; /* LanManager response length (always 0x18)*/
+ guint32 lm_resp_off; /* LanManager response offset */
+
+ guint16 nt_resp_len1; /* NT response length (always 0x18) */
+ guint16 nt_resp_len2; /* NT response length (always 0x18) */
+ guint32 nt_resp_off; /* NT response offset */
+
+ guint16 dom_len1; /* domain string length */
+ guint16 dom_len2; /* domain string length */
+ guint32 dom_off; /* domain string offset (always 0x00000040) */
+
+ guint16 user_len1; /* username string length */
+ guint16 user_len2; /* username string length */
+ guint32 user_off; /* username string offset */
+
+ guint16 host_len1; /* host string length */
+ guint16 host_len2; /* host string length */
+ guint32 host_off; /* host string offset */
+
+ guint16 sess_len1;
+ guint16 sess_len2;
+ guint32 sess_off; /* message length */
+
+ guint32 flags; /* 0x00008201 */
+ /* guint32 flags2; */ /* unknown, used in windows messenger */
+ /* guint32 flags3; */
+
+#if 0
+ guint8 dom[*]; /* domain string (unicode UTF-16LE) */
+ guint8 user[*]; /* username string (unicode UTF-16LE) */
+ guint8 host[*]; /* host string (unicode UTF-16LE) */
+ guint8 lm_resp[*]; /* LanManager response */
+ guint8 nt_resp[*]; /* NT response */
+#endif
+};
+
+guint8 *
+purple_ntlm_parse_type2(const gchar *type2, guint32 *flags)
+{
+ gsize retlen;
+ guchar *buff;
+ struct type2_message tmsg;
+ static guint8 nonce[8];
+
+ buff = g_base64_decode(type2, &retlen);
+
+ if (buff != NULL && retlen >= (sizeof(struct type2_message) - 1)) {
+ memcpy(&tmsg, buff, MIN(retlen, sizeof(tmsg)));
+ memcpy(nonce, tmsg.nonce, 8);
+ if (flags != NULL)
+ *flags = GUINT16_FROM_LE(tmsg.flags);
+ } else {
+ purple_debug_error("ntlm", "Unable to parse type2 message - returning empty nonce.\n");
+ memset(nonce, 0, 8);
+ }
+ g_free(buff);
+
+ return nonce;
+}
+
+/*
+ * Create a 64bit DES key by taking a 56bit key and adding
+ * a parity bit after every 7th bit.
+ */
+static void
+setup_des_key(const guint8 key_56[], guint8 *key)
+{
+ key[0] = key_56[0];
+ key[1] = ((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1);
+ key[2] = ((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2);
+ key[3] = ((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3);
+ key[4] = ((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4);
+ key[5] = ((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5);
+ key[6] = ((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6);
+ key[7] = (key_56[6] << 1) & 0xFF;
+}
+
+/*
+ * helper function for purple cipher.c
+ */
+static void
+des_ecb_encrypt(const guint8 *plaintext, guint8 *result, const guint8 *key)
+{
+ PurpleCipher *cipher;
+ gssize encsiz;
+
+ cipher = purple_des_cipher_new();
+ purple_cipher_set_key(cipher, key, 8);
+ encsiz = purple_cipher_encrypt(cipher, plaintext, 8, result, 8);
+ g_warn_if_fail(encsiz == 8);
+ g_object_unref(cipher);
+}
+
+/*
+ * takes a 21 byte array and treats it as 3 56-bit DES keys. The
+ * 8 byte plaintext is encrypted with each key and the resulting 24
+ * bytes are stored in the results array.
+ */
+static void
+calc_resp(guint8 *keys, const guint8 *plaintext, unsigned char *results)
+{
+ guint8 key[8];
+ setup_des_key(keys, key);
+ des_ecb_encrypt(plaintext, results, key);
+
+ setup_des_key(keys + 7, key);
+ des_ecb_encrypt(plaintext, results + 8, key);
+
+ setup_des_key(keys + 14, key);
+ des_ecb_encrypt(plaintext, results + 16, key);
+}
+
+/*
+ * TODO: We think we should be using cryptographically secure random numbers
+ * here. We think the rand() function is probably bad. We think
+ * /dev/urandom is a step up, but using a random function from an SSL
+ * library would probably be best. In Windows we could possibly also
+ * use CryptGenRandom.
+ */
+static void
+gensesskey(char *buffer)
+{
+ int fd;
+ int i;
+ ssize_t red = 0;
+
+ fd = open("/dev/urandom", O_RDONLY);
+ if (fd >= 0) {
+ red = read(fd, buffer, 16);
+ if (red < 0) {
+ purple_debug_warning("ntlm", "Error reading from /dev/urandom: %s."
+ " Falling back to inferior method.\n", g_strerror(errno));
+ red = 0;
+ } else if (red < 16) {
+ purple_debug_warning("ntlm", "Tried reading 16 bytes from "
+ "/dev/urandom but only got %"
+ G_GSSIZE_FORMAT ". Falling back to "
+ "inferior method\n", (gssize)red);
+ }
+ close(fd);
+ } else {
+ purple_debug_warning("ntlm", "Error opening /dev/urandom: %s."
+ " Falling back to inferior method.\n", g_strerror(errno));
+ }
+
+ for (i = red; i < 16; i++) {
+ buffer[i] = (char)(g_random_int() & 0xff);
+ }
+}
+
+gchar *
+purple_ntlm_gen_type3(const gchar *username, const gchar *passw, const gchar *hostname, const gchar *domain, const guint8 *nonce, guint32 *flags)
+{
+ char lm_pw[14];
+ unsigned char lm_hpw[21];
+ char sesskey[16];
+ guint8 key[8];
+ int domainlen;
+ int usernamelen;
+ int hostnamelen;
+ int msglen;
+ struct type3_message *tmsg;
+ int passwlen, lennt;
+ unsigned char lm_resp[24], nt_resp[24];
+ unsigned char magic[] = { 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 };
+ unsigned char nt_hpw[21];
+ char nt_pw[128];
+ PurpleHash *hash;
+ char *tmp;
+ int idx;
+ gchar *ucs2le;
+
+ domainlen = strlen(domain) * 2;
+ usernamelen = strlen(username) * 2;
+ hostnamelen = strlen(hostname) * 2;
+ msglen = sizeof(struct type3_message) + domainlen +
+ usernamelen + hostnamelen + 0x18 + 0x18 + ((flags) ? 0x10 : 0);
+ tmsg = g_malloc0(msglen);
+ passwlen = strlen(passw);
+
+ /* type3 message initialization */
+ tmsg->protocol[0] = 'N';
+ tmsg->protocol[1] = 'T';
+ tmsg->protocol[2] = 'L';
+ tmsg->protocol[3] = 'M';
+ tmsg->protocol[4] = 'S';
+ tmsg->protocol[5] = 'S';
+ tmsg->protocol[6] = 'P';
+ tmsg->type = GUINT32_TO_LE(0x00000003);
+ tmsg->lm_resp_len1 = tmsg->lm_resp_len2 = GUINT16_TO_LE(0x18);
+ tmsg->lm_resp_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen + usernamelen + hostnamelen);
+ tmsg->nt_resp_len1 = tmsg->nt_resp_len2 = GUINT16_TO_LE(0x18);
+ tmsg->nt_resp_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen + usernamelen + hostnamelen + 0x18);
+
+ tmsg->dom_len1 = tmsg->dom_len2 = GUINT16_TO_LE(domainlen);
+ tmsg->dom_off = GUINT32_TO_LE(sizeof(struct type3_message));
+
+ tmsg->user_len1 = tmsg->user_len2 = GUINT16_TO_LE(usernamelen);
+ tmsg->user_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen);
+
+ tmsg->host_len1 = tmsg->host_len2 = GUINT16_TO_LE(hostnamelen);
+ tmsg->host_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen + usernamelen);
+
+ if(flags) {
+ tmsg->sess_off = GUINT32_TO_LE(sizeof(struct type3_message) + domainlen + usernamelen + hostnamelen + 0x18 + 0x18);
+ tmsg->sess_len1 = tmsg->sess_len2 = GUINT16_TO_LE(0x0010);
+ }
+
+ tmsg->flags = GUINT32_TO_LE(0x00008201);
+
+ tmp = (char *)tmsg + sizeof(struct type3_message);
+
+ ucs2le = g_convert(domain, -1, "UTF-16LE", "UTF-8", NULL, NULL, NULL);
+ if (ucs2le != NULL) {
+ memcpy(tmp, ucs2le, domainlen);
+ g_free(ucs2le);
+ tmp += domainlen;
+ } else {
+ purple_debug_info("ntlm", "Unable to encode domain in UTF-16LE.\n");
+ }
+
+ ucs2le = g_convert(username, -1, "UTF-16LE", "UTF-8", NULL, NULL, NULL);
+ if (ucs2le != NULL) {
+ memcpy(tmp, ucs2le, usernamelen);
+ g_free(ucs2le);
+ tmp += usernamelen;
+ } else {
+ purple_debug_info("ntlm", "Unable to encode username in UTF-16LE.\n");
+ }
+
+ ucs2le = g_convert(hostname, -1, "UTF-16LE", "UTF-8", NULL, NULL, NULL);
+ if (ucs2le != NULL) {
+ memcpy(tmp, ucs2le, hostnamelen);
+ g_free(ucs2le);
+ tmp += hostnamelen;
+ } else {
+ purple_debug_info("ntlm", "Unable to encode hostname in UTF-16LE.\n");
+ }
+
+ /* LM */
+ if (passwlen > 14)
+ passwlen = 14;
+
+ for (idx = 0; idx < passwlen; idx++)
+ lm_pw[idx] = g_ascii_toupper(passw[idx]);
+ for (; idx < 14; idx++)
+ lm_pw[idx] = 0;
+
+ setup_des_key((unsigned char*)lm_pw, key);
+ des_ecb_encrypt(magic, lm_hpw, key);
+
+ setup_des_key((unsigned char*)(lm_pw + 7), key);
+ des_ecb_encrypt(magic, lm_hpw + 8, key);
+
+ memset(lm_hpw + 16, 0, 5);
+ calc_resp(lm_hpw, nonce, lm_resp);
+ memcpy(tmp, lm_resp, 0x18);
+ tmp += 0x18;
+
+ /* NTLM */
+ /* Convert the password to UTF-16LE */
+ lennt = strlen(passw);
+ for (idx = 0; idx < lennt; idx++)
+ {
+ nt_pw[2 * idx] = passw[idx];
+ nt_pw[2 * idx + 1] = 0;
+ }
+
+ hash = purple_md4_hash_new();
+ purple_hash_append(hash, (guint8 *)nt_pw, 2 * lennt);
+ purple_hash_digest(hash, nt_hpw, sizeof(nt_hpw));
+ g_object_unref(hash);
+
+ memset(nt_hpw + 16, 0, 5);
+ calc_resp(nt_hpw, nonce, nt_resp);
+ memcpy(tmp, nt_resp, 0x18);
+ tmp += 0x18;
+
+ /* LCS Stuff */
+ if (flags) {
+ tmsg->flags = GUINT32_TO_LE(0x409082d4);
+ gensesskey(sesskey);
+ memcpy(tmp, sesskey, 0x10);
+ }
+
+ /*tmsg->flags2 = 0x0a280105;
+ tmsg->flags3 = 0x0f000000;*/
+
+ tmp = g_base64_encode((guchar *)tmsg, msglen);
+ g_free(tmsg);
+
+ return tmp;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/libpurple/protocols/simple/ntlm.h Sun Jun 04 21:36:37 2017 -0500
@@ -0,0 +1,58 @@
+/* purple
+ *
+ * Copyright (C) 2005, Thomas Butter <butter@uni-mannheim.de>
+ *
+ * ntlm structs are taken from NTLM description on
+ * http://www.innovation.ch/java/ntlm.html
+ *
+ * This program 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.
+ *
+ * This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
+ */
+
+#ifndef _PURPLE_NTLM_H
+#define _PURPLE_NTLM_H
+
+G_BEGIN_DECLS
+
+/**
+ * purple_ntlm_parse_type2:
+ * @type2: String containing the base64 encoded type2 message
+ * @flags: If not %NULL, this will store the flags for the message
+ *
+ * Parses the ntlm type 2 message
+ *
+ * Returns: The nonce for use in message type3. This is a statically
+ * allocated 8 byte binary string.
+ */
+guint8 *purple_ntlm_parse_type2(const gchar *type2, guint32 *flags);
+
+/**
+ * purple_ntlm_gen_type3:
+ * @username: The username
+ * @passw: The password
+ * @hostname: The hostname
+ * @domain: The domain to authenticate against
+ * @nonce: The nonce returned by purple_ntlm_parse_type2
+ * @flags: Pointer to the flags returned by purple_ntlm_parse_type2
+ *
+ * Generates a type3 message
+ *
+ * Returns: A base64 encoded type3 message. This should be g_free'd by
+ * the caller.
+ */
+gchar *purple_ntlm_gen_type3(const gchar *username, const gchar *passw, const gchar *hostname, const gchar *domain, const guint8 *nonce, guint32 *flags);
+
+G_END_DECLS
+
+#endif /* _PURPLE_NTLM_H */
--- a/libpurple/proxy.c Sun Jun 04 21:36:19 2017 -0500
+++ b/libpurple/proxy.c Sun Jun 04 21:36:37 2017 -0500
@@ -30,7 +30,6 @@
#include "debug.h"
#include "http.h"
#include "notify.h"
-#include "ntlm.h"
#include "prefs.h"
#include "proxy.h"
#include "purple-gio.h"
--- a/libpurple/purple.h.in Sun Jun 04 21:36:19 2017 -0500
+++ b/libpurple/purple.h.in Sun Jun 04 21:36:37 2017 -0500
@@ -70,7 +70,6 @@
#include <nat-pmp.h>
#include <network.h>
#include <notify.h>
-#include <ntlm.h>
#include <plugins.h>
#include <pluginpref.h>
#include <pounce.h>