Merge branch 'master' of https://github.com/strophe/libstrophe

Conflicts:
	configure.ac

.gitignore

@@ -29,6 +29,7 @@ tests/check_parser
 *.zip
 docs/html
 TAGS
+tags
 examples/basic
 examples/active
 examples/roster
@@ -41,3 +42,4 @@ tests/test_hash
 tests/test_jid
 tests/test_sasl
 tests/test_sock
+m4/

ChangeLog

@@ -1,3 +1,5 @@
-0.8.5
- - libtoolize to generate .so
+TBA
+	- SCRAM-SHA-1 authentication mechanism
 
+0.8.5
+	- libtoolize to generate .so

Makefile.am

@@ -1,27 +1,31 @@
 AUTOMAKE_OPTIONS = subdir-objects
 
+ACLOCAL_AMFLAGS = -I m4
 AM_CFLAGS = -g -Wall
 
 PARSER_CFLAGS=@PARSER_CFLAGS@
 PARSER_LIBS=@PARSER_LIBS@
 
-SSL_LIBS = -lssl -lcrypto -lz
+SSL_LIBS = @openssl_LIBS@
 
 STROPHE_FLAGS = -I$(top_srcdir)
-STROPHE_LIBS = -lstrophe $(PARSER_LIBS) $(SSL_LIBS)
+STROPHE_LIBS = libstrophe.la
 
 ## Main build targets
 lib_LTLIBRARIES = libstrophe.la
 
-libstrophe_la_CFLAGS=$(STROPHE_FLAGS) $(PARSER_CFLAGS)
-libstrophe_la_LDFLAGS=$(SSL_LIBS) $(PARSER_LIBS)
+libstrophe_la_CFLAGS = $(STROPHE_FLAGS) $(PARSER_CFLAGS)
+libstrophe_la_LDFLAGS = $(SSL_LIBS) $(PARSER_LIBS)
+# Export only public API
+libstrophe_la_LDFLAGS += -export-symbols-regex '^xmpp_'
 libstrophe_la_SOURCES = src/auth.c src/conn.c src/ctx.c \
 	src/event.c src/handler.c src/hash.c \
-	src/jid.c src/md5.c src/sasl.c src/sha1.c \
+	src/jid.c src/md5.c src/sasl.c src/scram.c src/sha1.c \
 	src/snprintf.c src/sock.c src/stanza.c src/thread.c \
 	src/tls_openssl.c src/util.c \
 	src/common.h src/hash.h src/md5.h src/ostypes.h src/parser.h \
-	src/sasl.h src/sha1.h src/sock.h src/thread.h src/tls.h src/util.h
+	src/sasl.h src/scram.h src/sha1.h src/sock.h src/thread.h src/tls.h \
+	src/util.h
 
 if PARSER_EXPAT
 libstrophe_la_SOURCES += src/parser_expat.c

README.markdown

@@ -56,10 +56,9 @@ check package.
 
 ### OS X (with Homebrew package manager)
 
-You can install the requirements with:
+You can install libstrophe with:
 
-    brew install expat
-    brew install check
+    brew install libstrophe
 
 ## Documentation
 

configure.ac

@@ -1,11 +1,20 @@
-AC_INIT([libstrophe], [0.8.5], [jack@metajack.im])
+AC_INIT([libstrophe], [0.8.7], [jack@metajack.im])
+AC_CONFIG_MACRO_DIR([m4])
 AM_INIT_AUTOMAKE([foreign])
 LT_INIT([dlopen])
 
 AC_PROG_CC
 AM_PROG_CC_C_O
+PKG_PROG_PKG_CONFIG
+
+AC_CANONICAL_HOST
+AS_CASE([$host_os],
+  [freebsd*], [PLATFORM="freebsd"],
+  [PLATFORM="nix"])
+
+PKG_CHECK_MODULES([openssl], [openssl], [],
+            [AC_CHECK_HEADER(openssl/ssl.h, [openssl_LIBS="-lssl -lcrypto"], [AC_MSG_ERROR([openssl not found; openssl required])])])
 
-AC_CHECK_HEADER(openssl/ssl.h, [], [AC_MSG_ERROR([couldn't find openssl headers, openssl required])])
 PKG_CHECK_MODULES([check], [check >= 0.9.4], [], [AC_MSG_WARN([libcheck not found; unit tests will not be compilable])])
 
 AC_ARG_WITH([libxml2],
@@ -18,32 +27,39 @@ if test "x$with_libxml2" != xno; then
                     [with_libxml2=yes], [dummy=1])
   if test "x$with_libxml2" != xyes; then
     old_CFLAGS=$CFLAGS
-    CFLAGS="-I /usr/include/libxml2"
+    CFLAGS="-I${includedir}/libxml2"
     AC_CHECK_HEADER([libxml/parser.h],
-                    [with_libxml2=yes; libxml2_CFLAGS="-I /usr/include/libxml2"; libxml2_LIBS="-lxml2"],
-                    [AC_MSG_ERROR([couldn't find libxml2])])
+                    [with_libxml2=yes; libxml2_CFLAGS="-I${includedir}/libxml2"; libxml2_LIBS="-lxml2"],
+                    [AC_MSG_ERROR([libxml2 not found.])])
     CFLAGS=$old_CFLAGS
   fi
 else
-  AC_CHECK_HEADER(expat.h, [], [AC_MSG_ERROR([couldn't find expat headers; expat required])])
+  PKG_CHECK_MODULES([expat], [expat >= 2.0.0], [],
+                    [AC_CHECK_HEADER(expat.h, [expat_LIBS="-lexpat"], [AC_MSG_ERROR([expat not found; expat required.])])])
 fi
 
 if test "x$with_libxml2" = xyes; then
   with_parser=libxml2
   PARSER_NAME=libxml2
-  PARSER_CFLAGS=\$\(libxml2_CFLAGS\)
-  PARSER_LIBS=\$\(libxml2_LIBS\)
+  PARSER_CFLAGS=$libxml2_CFLAGS
+  PARSER_LIBS=$libxml2_LIBS
 else
   with_parser=expat
   PARSER_NAME=expat
-  PARSER_CFLAGS=
-  PARSER_LIBS=-lexpat
+  PARSER_CFLAGS=$expat_CFLAGS
+  PARSER_LIBS=$expat_LIBS
 fi
 
 AC_MSG_NOTICE([libstrophe will use the $with_parser XML parser])
 AC_SEARCH_LIBS([socket], [socket])
 
-AC_LINK_IFELSE([AC_LANG_CALL([#include <resolv.h>], [res_query])], [],[LIBS="$LIBS -lresolv"])
+if test "x$PLATFORM" != xfreebsd; then
+        AC_CHECK_LIB([resolv], [res_query], [],
+            [AC_CHECK_LIB([resolv], [__res_query], [],
+                [AC_MSG_ERROR([libresolv not found; libresolv required. ])])])
+else
+        AC_MSG_NOTICE([skipping libresolv checks for freebsd])
+fi
 
 AC_CHECK_HEADERS([arpa/nameser_compat.h])
 

examples/bot.c

@@ -77,7 +77,7 @@ int message_handler(xmpp_conn_t * const conn, xmpp_stanza_t * const stanza, void
 	xmpp_ctx_t *ctx = (xmpp_ctx_t*)userdata;
 	
 	if(!xmpp_stanza_get_child_by_name(stanza, "body")) return 1;
-	if(!strcmp(xmpp_stanza_get_attribute(stanza, "type"), "error")) return 1;
+	if(xmpp_stanza_get_attribute(stanza, "type") !=NULL && !strcmp(xmpp_stanza_get_attribute(stanza, "type"), "error")) return 1;
 	
 	intext = xmpp_stanza_get_text(xmpp_stanza_get_child_by_name(stanza, "body"));
 	

src/auth.c

@@ -19,12 +19,13 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 
 #include "strophe.h"
 #include "common.h"
 #include "sasl.h"
 
-#ifdef _WIN32
+#ifdef _MSC_VER
 #define strcasecmp stricmp
 #endif
 
@@ -56,7 +57,6 @@
 #endif
 
 static void _auth(xmpp_conn_t * const conn);
-static void _handle_open_tls(xmpp_conn_t * const conn);
 static void _handle_open_sasl(xmpp_conn_t * const conn);
 static int _handle_missing_legacy(xmpp_conn_t * const conn,
 				  void * const userdata);
@@ -75,6 +75,10 @@ static int _handle_digestmd5_challenge(xmpp_conn_t * const conn,
 static int _handle_digestmd5_rspauth(xmpp_conn_t * const conn,
 			xmpp_stanza_t * const stanza,
 			void * const userdata);
+static int _handle_scram_sha1_challenge(xmpp_conn_t * const conn,
+			xmpp_stanza_t * const stanza,
+			void * const userdata);
+static char *_make_scram_sha1_init_msg(xmpp_conn_t * const conn);
 
 static int _handle_missing_features_sasl(xmpp_conn_t * const conn,
 					 void * const userdata);
@@ -229,6 +233,8 @@ static int _handle_features(xmpp_conn_t * const conn,
 		    conn->sasl_support |= SASL_MASK_PLAIN;
 		else if (strcasecmp(text, "DIGEST-MD5") == 0)
 		    conn->sasl_support |= SASL_MASK_DIGESTMD5;
+                else if (strcasecmp(text, "SCRAM-SHA-1") == 0)
+                    conn->sasl_support |= SASL_MASK_SCRAMSHA1;
 		else if (strcasecmp(text, "ANONYMOUS") == 0)
 		    conn->sasl_support |= SASL_MASK_ANONYMOUS;
 
@@ -416,6 +422,117 @@ static int _handle_digestmd5_rspauth(xmpp_conn_t * const conn,
     return 1;
 }
 
+/* handle the challenge phase of SCRAM-SHA-1 auth */
+static int _handle_scram_sha1_challenge(xmpp_conn_t * const conn,
+					xmpp_stanza_t * const stanza,
+					void * const userdata)
+{
+    char *text;
+    char *response;
+    xmpp_stanza_t *auth, *authdata;
+    char *name;
+    char *challenge;
+    char *scram_init = (char *)userdata;
+
+    name = xmpp_stanza_get_name(stanza);
+    xmpp_debug(conn->ctx, "xmpp",
+               "handle SCRAM-SHA-1 (challenge) called for %s", name);
+
+    if (strcmp(name, "challenge") == 0) {
+        text = xmpp_stanza_get_text(stanza);
+        if (!text)
+            goto err;
+
+        challenge = (char *)base64_decode(conn->ctx, text, strlen(text));
+        xmpp_free(conn->ctx, text);
+        if (!challenge)
+            goto err;
+
+        response = sasl_scram_sha1(conn->ctx, challenge, scram_init,
+                                   conn->jid, conn->pass);
+        xmpp_free(conn->ctx, challenge);
+        if (!response)
+            goto err;
+
+        auth = xmpp_stanza_new(conn->ctx);
+        if (!auth)
+            goto err_free_response;
+        xmpp_stanza_set_name(auth, "response");
+        xmpp_stanza_set_ns(auth, XMPP_NS_SASL);
+
+        authdata = xmpp_stanza_new(conn->ctx);
+        if (!authdata)
+            goto err_release_auth;
+        xmpp_stanza_set_text(authdata, response);
+        xmpp_free(conn->ctx, response);
+
+        xmpp_stanza_add_child(auth, authdata);
+        xmpp_stanza_release(authdata);
+
+        xmpp_send(conn, auth);
+        xmpp_stanza_release(auth);
+
+    } else {
+        xmpp_free(conn->ctx, scram_init);
+        return _handle_sasl_result(conn, stanza, "SCRAM-SHA-1");
+    }
+
+    return 1;
+
+err_release_auth:
+    xmpp_stanza_release(auth);
+err_free_response:
+    xmpp_free(conn->ctx, response);
+err:
+    xmpp_free(conn->ctx, scram_init);
+    disconnect_mem_error(conn);
+    return 0;
+}
+
+static char *_get_nonce(xmpp_ctx_t *ctx)
+{
+    unsigned char buffer[sizeof(clock_t) + sizeof(time_t)] = {0};
+    clock_t ticks = clock();
+    time_t t;
+
+    if (ticks != (clock_t)-1) {
+        *(clock_t *)buffer = ticks;
+    }
+    t = time((time_t *)(buffer + sizeof(clock_t)));
+    if (t == (time_t)-1) {
+        *(time_t *)(buffer + sizeof(clock_t)) = (time_t)rand();
+    }
+
+    return base64_encode(ctx, buffer, sizeof(buffer));
+}
+
+static char *_make_scram_sha1_init_msg(xmpp_conn_t * const conn)
+{
+    size_t message_len;
+    char *node;
+    char *message;
+    char *nonce;
+
+    node = xmpp_jid_node(conn->ctx, conn->jid);
+    if (!node) {
+        return NULL;
+    }
+
+    nonce = _get_nonce(conn->ctx);
+    if (!nonce) {
+        return NULL;
+    }
+    message_len = strlen(node) + strlen(nonce) + 8 + 1;
+    message = xmpp_alloc(conn->ctx, message_len);
+    if (message) {
+        xmpp_snprintf(message, message_len, "n,,n=%s,r=%s", node, nonce);
+        xmpp_free(conn->ctx, node);
+    }
+    xmpp_free(conn->ctx, nonce);
+
+    return message;
+}
+
 static xmpp_stanza_t *_make_starttls(xmpp_conn_t * const conn)
 {
     xmpp_stanza_t *starttls;
@@ -455,6 +572,7 @@ static void _auth(xmpp_conn_t * const conn)
 {
     xmpp_stanza_t *auth, *authdata, *query, *child, *iq;
     char *str, *authid;
+    char *scram_init;
     int anonjid;
 
     /* if there is no node in conn->jid, we assume anonymous connect */
@@ -517,6 +635,51 @@ static void _auth(xmpp_conn_t * const conn)
 	xmpp_error(conn->ctx, "auth", 
 		   "No node in JID, and SASL ANONYMOUS unsupported.");
 	xmpp_disconnect(conn);
+    } else if (conn->sasl_support & SASL_MASK_SCRAMSHA1) {
+        auth = _make_sasl_auth(conn, "SCRAM-SHA-1");
+        if (!auth) {
+            disconnect_mem_error(conn);
+            return;
+        }
+
+        /* don't free scram_init on success */
+        scram_init = _make_scram_sha1_init_msg(conn);
+        if (!scram_init) {
+            xmpp_stanza_release(auth);
+            disconnect_mem_error(conn);
+            return;
+        }
+
+        str = (char *)base64_encode(conn->ctx, (unsigned char *)scram_init,
+                                    strlen(scram_init));
+        if (!str) {
+            xmpp_free(conn->ctx, scram_init);
+            xmpp_stanza_release(auth);
+            disconnect_mem_error(conn);
+            return;
+        }
+
+        authdata = xmpp_stanza_new(conn->ctx);
+        if (!authdata) {
+            xmpp_free(conn->ctx, str);
+            xmpp_free(conn->ctx, scram_init);
+            xmpp_stanza_release(auth);
+            disconnect_mem_error(conn);
+            return;
+        }
+        xmpp_stanza_set_text(authdata, str);
+        xmpp_free(conn->ctx, str);
+        xmpp_stanza_add_child(auth, authdata);
+        xmpp_stanza_release(authdata);
+
+        handler_add(conn, _handle_scram_sha1_challenge,
+                    XMPP_NS_SASL, NULL, NULL, (void *)scram_init);
+
+        xmpp_send(conn, auth);
+        xmpp_stanza_release(auth);
+
+        /* SASL SCRAM-SHA-1 was tried, unset flag */
+        conn->sasl_support &= ~SASL_MASK_SCRAMSHA1;
     } else if (conn->sasl_support & SASL_MASK_DIGESTMD5) {
 	auth = _make_sasl_auth(conn, "DIGEST-MD5");
 	if (!auth) {
@@ -556,6 +719,7 @@ static void _auth(xmpp_conn_t * const conn)
 	}
 	xmpp_stanza_set_text(authdata, str);
 	xmpp_free(conn->ctx, str);
+	xmpp_free(conn->ctx, authid);
 
 	xmpp_stanza_add_child(auth, authdata);
 	xmpp_stanza_release(authdata);

src/common.h

@@ -21,12 +21,10 @@
 
 #include <stdio.h>
 #include <stdarg.h>
-#ifndef _WIN32
-#include <stdint.h>
-#endif
 
 
 #include "strophe.h"
+#include "ostypes.h"
 #include "sock.h"
 #include "tls.h"
 #include "hash.h"
@@ -147,6 +145,7 @@ struct _xmpp_handlist_t {
 #define SASL_MASK_PLAIN 0x01
 #define SASL_MASK_DIGESTMD5 0x02
 #define SASL_MASK_ANONYMOUS 0x04
+#define SASL_MASK_SCRAMSHA1 0x08
 
 typedef void (*xmpp_open_handler)(xmpp_conn_t * const conn);
 

src/conn.c

@@ -270,7 +270,7 @@ int xmpp_conn_release(xmpp_conn_t * const conn)
 	
 	if (conn->domain) xmpp_free(ctx, conn->domain);
 	if (conn->jid) xmpp_free(ctx, conn->jid);
-    if (conn->bound_jid) xmpp_free(ctx, conn->bound_jid);
+	if (conn->bound_jid) xmpp_free(ctx, conn->bound_jid);
 	if (conn->pass) xmpp_free(ctx, conn->pass);
 	if (conn->stream_id) xmpp_free(ctx, conn->stream_id);
 	if (conn->lang) xmpp_free(ctx, conn->lang);

src/ctx.c

@@ -252,29 +252,34 @@ void xmpp_log(const xmpp_ctx_t * const ctx,
     char *buf;
     va_list copy;
 
-    buf = smbuf;
     va_copy(copy, ap);
-    ret = xmpp_vsnprintf(buf, 1023, fmt, ap);
-    if (ret > 1023) {
+    ret = xmpp_vsnprintf(smbuf, sizeof(smbuf), fmt, ap);
+    if (ret >= (int)sizeof(smbuf)) {
 	buf = (char *)xmpp_alloc(ctx, ret + 1);
 	if (!buf) {
 	    buf = NULL;
 	    xmpp_error(ctx, "log", "Failed allocating memory for log message.");
-            va_end(copy);
+	    va_end(copy);
 	    return;
 	}
 	oldret = ret;
 	ret = xmpp_vsnprintf(buf, ret + 1, fmt, copy);
 	if (ret > oldret) {
 	    xmpp_error(ctx, "log", "Unexpected error");
+	    xmpp_free(ctx, buf);
+	    va_end(copy);
 	    return;
 	}
     } else {
-        va_end(copy);
+	buf = smbuf;
     }
+    va_end(copy);
 
     if (ctx->log->handler)
         ctx->log->handler(ctx->log->userdata, level, area, buf);
+
+    if (buf != smbuf)
+        xmpp_free(ctx, buf);
 }
 
 /** Write to the log at the ERROR level.

src/handler.c

@@ -23,14 +23,9 @@
 #include <stdlib.h>
 #include <string.h>
 
-#ifndef _WIN32
-#include <stdint.h>
-#else
-#include "ostypes.h"
-#endif
-
 #include "strophe.h"
 #include "common.h"
+#include "ostypes.h"
 
 /** Fire off all stanza handlers that match.
  *  This function is called internally by the event loop whenever stanzas

src/md5.c

@@ -43,6 +43,9 @@
 	(cp)[3] = ((value) >> 24) & 0xFF; \
     } while(0)
 
+static void MD5Transform(uint32_t buf[4], const unsigned char inext[64],
+			 struct MD5Context *ctx);
+
 /*
  * Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
  * initialization constants.
@@ -179,8 +182,8 @@ void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
  * reflect the addition of 16 longwords of new data.  MD5Update blocks
  * the data and converts bytes into longwords for this routine.
  */
-void MD5Transform(uint32_t buf[4], const unsigned char inext[64],
-	struct MD5Context *ctx)
+static void MD5Transform(uint32_t buf[4], const unsigned char inext[64],
+			 struct MD5Context *ctx)
 {
     register uint32_t a, b, c, d, i;
     uint32_t in[16];

src/md5.h

@@ -11,15 +11,8 @@
 #ifndef MD5_H
 #define MD5_H
 
-/* we use the uint32_t type from stdint.h
- * if it is not available, add a typedef here:
- */
 /* make sure the stdint.h types are available */
-#if defined(_MSC_VER) /* Microsoft Visual C++ */
-  typedef unsigned int              uint32_t;
-#else
-#include <stdint.h>
-#endif
+#include "ostypes.h"
 
 struct MD5Context {
 	uint32_t buf[4];
@@ -31,8 +24,6 @@ void MD5Init(struct MD5Context *context);
 void MD5Update(struct MD5Context *context, unsigned char const *buf,
 	       uint32_t len);
 void MD5Final(unsigned char digest[16], struct MD5Context *context);
-void MD5Transform(uint32_t buf[4], const unsigned char in[64],
-			struct MD5Context *ctx);
 
 #ifdef DEBUG_MD5
 void MD5DumpBytes(unsigned char *b, int len);

src/ostypes.h

@@ -20,8 +20,18 @@
 #ifndef __LIBSTROPHE_OSTYPES_H__
 #define __LIBSTROPHE_OSTYPES_H__
 
-#ifdef _WIN32
+#if defined (_MSC_VER) && _MSC_VER < 1600
+typedef signed char int8_t;
+typedef short int int16_t;
+typedef int int32_t;
+typedef __int64 int64_t;
+
+typedef unsigned char uint8_t;
+typedef unsigned short int uint16_t;
+typedef unsigned int uint32_t;
 typedef unsigned __int64 uint64_t; 
+#else
+#include <stdint.h>
 #endif
 
 #endif /* __LIBSTROPHE_OSTYPES_H__ */

src/sasl.c

@@ -16,26 +16,19 @@
  *  SASL authentication.
  */
 
+#include <stdlib.h>
 #include <string.h>
 
 #include "strophe.h"
 #include "common.h"
+#include "ostypes.h"
 #include "sasl.h"
 #include "md5.h"
+#include "sha1.h"
+#include "scram.h"
 
-/* make sure the stdint.h types are available */
-#if defined(_MSC_VER) /* Microsoft Visual C++ */
-  typedef signed char             int8_t;
-  typedef short int               int16_t;
-  typedef int                     int32_t;
-  typedef __int64                 int64_t;
-
-  typedef unsigned char             uint8_t;
-  typedef unsigned short int        uint16_t;
-  typedef unsigned int              uint32_t;
-  /* no uint64_t */
-#else
-#include <stdint.h>
+#ifdef _WIN32
+#define strtok_r strtok_s
 #endif
 
 
@@ -360,6 +353,113 @@ char *sasl_digest_md5(xmpp_ctx_t *ctx, const char *challenge,
     return response;
 }
 
+/** generate auth response string for the SASL SCRAM-SHA-1 mechanism */
+char *sasl_scram_sha1(xmpp_ctx_t *ctx, const char *challenge,
+                      const char *first_bare, const char *jid,
+                      const char *password)
+{
+    uint8_t key[SHA1_DIGEST_SIZE];
+    uint8_t sign[SHA1_DIGEST_SIZE];
+    char *r = NULL;
+    char *s = NULL;
+    char *i = NULL;
+    char *sval;
+    size_t sval_len;
+    long ival;
+    char *tmp;
+    char *ptr;
+    char *saveptr = NULL;
+    char *response;
+    char *auth;
+    char *response_b64;
+    char *sign_b64;
+    char *result = NULL;
+    size_t response_len;
+    size_t auth_len;
+    int j;
+
+    tmp = xmpp_strdup(ctx, challenge);
+    if (!tmp) {
+        return NULL;
+    }
+
+    ptr = strtok_r(tmp, ",", &saveptr);
+    while (ptr) {
+        if (strncmp(ptr, "r=", 2) == 0) {
+            r = ptr;
+        } else if (strncmp(ptr, "s=", 2) == 0) {
+            s = ptr + 2;
+        } else if (strncmp(ptr, "i=", 2) == 0) {
+            i = ptr + 2;
+        }
+        ptr = strtok_r(NULL, ",", &saveptr);
+    }
+
+    if (!r || !s || !i) {
+        goto out;
+    }
+
+    sval = (char *)base64_decode(ctx, s, strlen(s));
+    if (!sval) {
+        goto out;
+    }
+    sval_len = base64_decoded_len(ctx, s, strlen(s));
+    ival = strtol(i, &saveptr, 10);
+
+    auth_len = 10 + strlen(r) + strlen(first_bare) + strlen(challenge);
+    auth = xmpp_alloc(ctx, auth_len);
+    if (!auth) {
+        goto out_sval;
+    }
+
+    response_len = 39 + strlen(r);
+    response = xmpp_alloc(ctx, response_len);
+    if (!response) {
+        goto out_auth;
+    }
+
+    xmpp_snprintf(response, response_len, "c=biws,%s", r);
+    xmpp_snprintf(auth, auth_len, "%s,%s,%s", first_bare + 3, challenge,
+                  response);
+
+    SCRAM_SHA1_ClientKey((uint8_t *)password, strlen(password),
+                         (uint8_t *)sval, sval_len, (uint32_t)ival, key);
+    SCRAM_SHA1_ClientSignature(key, (uint8_t *)auth, strlen(auth), sign);
+    for (j = 0; j < SHA1_DIGEST_SIZE; j++) {
+        sign[j] ^= key[j];
+    }
+
+    sign_b64 = base64_encode(ctx, sign, sizeof(sign));
+    if (!sign_b64) {
+        goto out_response;
+    }
+
+    if (strlen(response) + strlen(sign_b64) + 3 + 1 > response_len) {
+        xmpp_free(ctx, sign_b64);
+        goto out_response;
+    }
+    strcat(response, ",p=");
+    strcat(response, sign_b64);
+    xmpp_free(ctx, sign_b64);
+
+    response_b64 = base64_encode(ctx, (unsigned char *)response,
+                                 strlen(response));
+    if (!response_b64) {
+        goto out_response;
+    }
+    result = response_b64;
+
+out_response:
+    xmpp_free(ctx, response);
+out_auth:
+    xmpp_free(ctx, auth);
+out_sval:
+    xmpp_free(ctx, sval);
+out:
+    xmpp_free(ctx, tmp);
+    return result;
+}
+
 
 /** Base64 encoding routines. Implemented according to RFC 3548 */
 
@@ -552,8 +652,8 @@ unsigned char *base64_decode(xmpp_ctx_t *ctx,
 		if (hextet != 64) goto _base64_decode_error;
 		break;
 	}
+	*d = '\0';
     }
-    *d = '\0';
     return dbuf;
 
 _base64_decode_error:	

src/sasl.h

@@ -26,6 +26,9 @@
 char *sasl_plain(xmpp_ctx_t *ctx, const char *authid, const char *password);
 char *sasl_digest_md5(xmpp_ctx_t *ctx, const char *challenge,
 		      const char *jid, const char *password);
+char *sasl_scram_sha1(xmpp_ctx_t *ctx, const char *challenge,
+                      const char *first_bare, const char *jid,
+                      const char *password);
 
 
 /** Base64 encoding routines. Implemented according to RFC 3548 */

src/scram.c

@@ -0,0 +1,146 @@
+/* scram.c
+ * strophe XMPP client library
+ *
+ * SCRAM-SHA1 helper functions according to RFC5802
+ * HMAC-SHA1 implementation according to RFC2104
+ *
+ * Copyright (C) 2013 Dmitry Podgorny <pasis.ua@gmail.com>
+ *
+ *  This software is provided AS-IS with no warranty, either express
+ *  or implied.
+ *
+ *  This software is distributed under license and may not be copied,
+ *  modified or distributed except as expressly authorized under the
+ *  terms of the license contained in the file LICENSE.txt in this
+ *  distribution.
+ */
+
+/** @file
+ *  SCRAM-SHA1 helper functions.
+ */
+
+#include <assert.h>
+#include <string.h>
+
+#include "sha1.h"
+#include "ostypes.h"
+
+#include "scram.h"
+
+/* block size for HMAC */
+#define BLOCK_SIZE 64
+#if BLOCK_SIZE < SHA1_DIGEST_SIZE
+#error BLOCK_SIZE must not be less than SHA1_DIGEST_SIZE
+#endif
+
+static const uint8_t ipad = 0x36;
+static const uint8_t opad = 0x5C;
+
+static void SHA1(const uint8_t* data, size_t len,
+                 uint8_t digest[SHA1_DIGEST_SIZE])
+{
+    SHA1_CTX ctx;
+    SHA1_Init(&ctx);
+    SHA1_Update(&ctx, data, len);
+    SHA1_Final(&ctx, digest);
+}
+
+static void HMAC_SHA1(const uint8_t *key, size_t key_len,
+                      const uint8_t *text, size_t len,
+                      uint8_t digest[SHA1_DIGEST_SIZE])
+{
+    uint8_t key_pad[BLOCK_SIZE];
+    uint8_t key_ipad[BLOCK_SIZE];
+    uint8_t key_opad[BLOCK_SIZE];
+    uint8_t sha_digest[SHA1_DIGEST_SIZE];
+    int i;
+    SHA1_CTX ctx;
+
+    memset(key_pad, 0, sizeof(key_pad));
+    if (key_len <= BLOCK_SIZE) {
+        memcpy(key_pad, key, key_len);
+    } else {
+        /* according to RFC2104 */
+        SHA1(key, key_len, key_pad);
+    }
+
+    for (i = 0; i < BLOCK_SIZE; i++) {
+        key_ipad[i] = key_pad[i] ^ ipad;
+        key_opad[i] = key_pad[i] ^ opad;
+    }
+
+    SHA1_Init(&ctx);
+    SHA1_Update(&ctx, key_ipad, BLOCK_SIZE);
+    SHA1_Update(&ctx, text, len);
+    SHA1_Final(&ctx, sha_digest);
+
+    SHA1_Init(&ctx);
+    SHA1_Update(&ctx, key_opad, BLOCK_SIZE);
+    SHA1_Update(&ctx, sha_digest, SHA1_DIGEST_SIZE);
+    SHA1_Final(&ctx, digest);
+}
+
+static void SCRAM_SHA1_Hi(const uint8_t *text, size_t len,
+                          const uint8_t *salt, size_t salt_len, uint32_t i,
+                          uint8_t digest[SHA1_DIGEST_SIZE])
+{
+    int j, k;
+    uint8_t tmp[128];
+
+    static uint8_t int1[] = {0x0, 0x0, 0x0, 0x1};
+
+    /* assume salt + INT(1) isn't longer than sizeof(tmp) */
+    assert(salt_len <= sizeof(tmp) - sizeof(int1));
+
+    memset(digest, 0, SHA1_DIGEST_SIZE);
+    if (i == 0) {
+        return;
+    }
+
+    memcpy(tmp, salt, salt_len);
+    memcpy(&tmp[salt_len], int1, sizeof(int1));
+
+    /* 'text' for Hi is a 'key' for HMAC */
+    HMAC_SHA1(text, len, tmp, salt_len + sizeof(int1), digest);
+    memcpy(tmp, digest, SHA1_DIGEST_SIZE);
+
+    for (j = 1; j < i; j++) {
+        HMAC_SHA1(text, len, tmp, SHA1_DIGEST_SIZE, tmp);
+        for (k = 0; k < SHA1_DIGEST_SIZE; k++) {
+            digest[k] ^= tmp[k];
+        }
+    }
+}
+
+void SCRAM_SHA1_ClientKey(const uint8_t *password, size_t len,
+                          const uint8_t *salt, size_t salt_len, uint32_t i,
+                          uint8_t key[SHA1_DIGEST_SIZE])
+{
+    uint8_t salted[SHA1_DIGEST_SIZE];
+
+    /* XXX: Normalize(password) is omitted */
+
+    SCRAM_SHA1_Hi(password, len, salt, salt_len, i, salted);
+    HMAC_SHA1(salted, SHA1_DIGEST_SIZE, (uint8_t *)"Client Key",
+              strlen("Client Key"), key);
+}
+
+void SCRAM_SHA1_ClientSignature(const uint8_t ClientKey[SHA1_DIGEST_SIZE],
+                                const uint8_t *AuthMessage, size_t len,
+                                uint8_t sign[SHA1_DIGEST_SIZE])
+{
+    uint8_t stored[SHA1_DIGEST_SIZE];
+
+    SHA1(ClientKey, SHA1_DIGEST_SIZE, stored);
+    HMAC_SHA1(stored, SHA1_DIGEST_SIZE, AuthMessage, len, sign);
+}
+
+void SCRAM_SHA1_ClientProof(const uint8_t ClientKey[SHA1_DIGEST_SIZE],
+                            const uint8_t ClientSignature[SHA1_DIGEST_SIZE],
+                            uint8_t proof[SHA1_DIGEST_SIZE])
+{
+    int i;
+    for (i = 0; i < SHA1_DIGEST_SIZE; i++) {
+        proof[i] = ClientKey[i] ^ ClientSignature[i];
+    }
+}

src/scram.h

@@ -0,0 +1,39 @@
+/* scram.h
+ * strophe XMPP client library -- SCRAM-SHA1 helper functions
+ *
+ * Copyright (C) 2013 Dmitry Podgorny <pasis.ua@gmail.com>
+ *
+ *  This software is provided AS-IS with no warranty, either express
+ *  or implied.
+ *
+ *  This software is distributed under license and may not be copied,
+ *  modified or distributed except as expressly authorized under the
+ *  terms of the license contained in the file LICENSE.txt in this
+ *  distribution.
+ */
+
+/** @file
+ *  SCRAM-SHA1 helper functions.
+ */
+
+#ifndef __LIBSTROPHE_SCRAM_H__
+#define __LIBSTROPHE_SCRAM_H__
+
+/* make sure the stdint.h types are available */
+#include "ostypes.h"
+
+#include "sha1.h"
+
+void SCRAM_SHA1_ClientKey(const uint8_t *password, size_t len,
+                          const uint8_t *salt, size_t salt_len, uint32_t i,
+                          uint8_t key[SHA1_DIGEST_SIZE]);
+
+void SCRAM_SHA1_ClientSignature(const uint8_t ClientKey[SHA1_DIGEST_SIZE],
+                                const uint8_t *AuthMessage, size_t len,
+                                uint8_t sign[SHA1_DIGEST_SIZE]);
+
+void SCRAM_SHA1_ClientProof(const uint8_t ClientKey[SHA1_DIGEST_SIZE],
+                            const uint8_t ClientSignature[SHA1_DIGEST_SIZE],
+                            uint8_t proof[SHA1_DIGEST_SIZE]);
+
+#endif /* __LIBSTROPHE_SCRAM_H__ */

src/sha1.c

@@ -86,23 +86,11 @@ A million repetitions of "a"
 #include <string.h>
 
 /* make sure the stdint.h types are available */
-#if defined(_MSC_VER) /* Microsoft Visual C++ */
-  typedef signed char             int8_t;
-  typedef short int               int16_t;
-  typedef int                     int32_t;
-  typedef __int64                 int64_t;
- 
-  typedef unsigned char             uint8_t;
-  typedef unsigned short int        uint16_t;
-  typedef unsigned int              uint32_t;
-  /* no uint64_t */
-#else
-#include <stdint.h>
-#endif
+#include "ostypes.h"
 
 #include "sha1.h"
 
-void SHA1_Transform(uint32_t state[5], const uint8_t buffer[64]);
+static void SHA1_Transform(uint32_t state[5], const uint8_t buffer[64]);
 
 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
 
@@ -140,7 +128,7 @@ void SHAPrintContext(SHA1_CTX *context, char *msg){
 #endif /* VERBOSE */
 
 /* Hash a single 512-bit block. This is the core of the algorithm. */
-void SHA1_Transform(uint32_t state[5], const uint8_t buffer[64])
+static void SHA1_Transform(uint32_t state[5], const uint8_t buffer[64])
 {
     uint32_t a, b, c, d, e;
     typedef union {

src/sha1.h

@@ -12,6 +12,9 @@
 extern "C" {
 #endif
 
+/* make sure the stdint.h types are available */
+#include "ostypes.h"
+
 typedef struct {
     uint32_t state[5];
     uint32_t count[2];

src/tls_openssl.c

@@ -25,7 +25,6 @@
 #endif
 
 #include <openssl/ssl.h>
-#include <openssl/rand.h>
 
 #include "common.h"
 #include "tls.h"

src/tls_schannel.c

@@ -75,11 +75,11 @@ tls_t *tls_new(xmpp_ctx_t *ctx, sock_t sock)
     SecPkgCred_CipherStrengths spc_cs;
     SecPkgCred_SupportedProtocols spc_sp;
 
-    OSVERSIONINFO osvi;
-
-    memset(&osvi, 0, sizeof(osvi));
-    osvi.dwOSVersionInfoSize = sizeof(osvi);
-
+    OSVERSIONINFO osvi;
+
+    memset(&osvi, 0, sizeof(osvi));
+    osvi.dwOSVersionInfoSize = sizeof(osvi);
+
     GetVersionEx(&osvi);
 
     /* no TLS support on win9x/me, despite what anyone says */
@@ -102,7 +102,7 @@ tls_t *tls_new(xmpp_ctx_t *ctx, sock_t sock)
 	return NULL;
     }
 
-    if (!(pInitSecurityInterface = 
+    if (!(pInitSecurityInterface =
 	  (void *)GetProcAddress(tls->hsec32, "InitSecurityInterfaceA"))) {
 	tls_free(tls);
 	return NULL;
@@ -148,26 +148,26 @@ tls_t *tls_new(xmpp_ctx_t *ctx, sock_t sock)
 
     /* This bunch of queries should trip up wine until someone fixes
      * schannel support there */
-    ret = tls->sft->QueryCredentialsAttributes(&(tls->hcred), SECPKG_ATTR_SUPPORTED_ALGS, &spc_sa);
-    if (ret != SEC_E_OK)
-    {
-	tls_free(tls);
-	return NULL;
-    }
-
-    ret = tls->sft->QueryCredentialsAttributes(&(tls->hcred), SECPKG_ATTR_CIPHER_STRENGTHS, &spc_cs);
-    if (ret != SEC_E_OK)
-    {
-	tls_free(tls);
-	return NULL;
-    }
-
-    ret = tls->sft->QueryCredentialsAttributes(&(tls->hcred), SECPKG_ATTR_SUPPORTED_PROTOCOLS, &spc_sp);
-    if (ret != SEC_E_OK)
-    {
-	tls_free(tls);
-	return NULL;
-    }
+    ret = tls->sft->QueryCredentialsAttributes(&(tls->hcred), SECPKG_ATTR_SUPPORTED_ALGS, &spc_sa);
+    if (ret != SEC_E_OK)
+    {
+	tls_free(tls);
+	return NULL;
+    }
+
+    ret = tls->sft->QueryCredentialsAttributes(&(tls->hcred), SECPKG_ATTR_CIPHER_STRENGTHS, &spc_cs);
+    if (ret != SEC_E_OK)
+    {
+	tls_free(tls);
+	return NULL;
+    }
+
+    ret = tls->sft->QueryCredentialsAttributes(&(tls->hcred), SECPKG_ATTR_SUPPORTED_PROTOCOLS, &spc_sp);
+    if (ret != SEC_E_OK)
+    {
+	tls_free(tls);
+	return NULL;
+    }
 
     return tls;
 }
@@ -196,7 +196,7 @@ void tls_free(tls_t *tls)
 	FreeLibrary(tls->hsec32);
 	tls->hsec32 = NULL;
     }
-    
+
     xmpp_free(tls->ctx, tls);
     return;
 }
@@ -360,7 +360,7 @@ int tls_start(tls_t *tls)
 	return 0;
     }
 
-    tls->sft->QueryContextAttributes(&(tls->hctxt), SECPKG_ATTR_STREAM_SIZES, 
+    tls->sft->QueryContextAttributes(&(tls->hctxt), SECPKG_ATTR_STREAM_SIZES,
 				&(tls->spcss));
 
     tls->recvbuffermaxlen = tls->spcss.cbHeader + tls->spcss.cbMaximumMessage
@@ -401,7 +401,7 @@ int tls_is_recoverable(int error)
 int tls_pending(tls_t *tls) {
 	// There are 3 cases:
 	// - there is data in ready buffer, so it is by default pending
-	// - there is data in recv buffer. If it is not decrypted yet, means it 
+	// - there is data in recv buffer. If it is not decrypted yet, means it
 	// was incomplete. This should be processed again only if there is data
 	// on the physical connection
 	// - there is data on the physical connection. This case is treated
@@ -440,7 +440,7 @@ int tls_read(tls_t *tls, void * const buff, const size_t len)
 	    read = tls_read(tls, newbuff, len - bytes);
 
 	    if (read == -1) {
-	        if (tls_is_recoverable(tls->lasterror))	{
+	        if (tls_is_recoverable(tls->lasterror)) {
 		    return bytes;
 		}
 
@@ -454,11 +454,11 @@ int tls_read(tls_t *tls, void * const buff, const size_t len)
     /* next, top up our recv buffer */
     bytes = sock_read(tls->sock, tls->recvbuffer + tls->recvbufferpos,
 		      tls->recvbuffermaxlen - tls->recvbufferpos);
-			  
+
     if (bytes == 0) {
         tls->lasterror = WSAECONNRESET;
         return -1;
-    }				  
+    }
 
     if (bytes == -1) {
 	if (!tls_is_recoverable(sock_error())) {
@@ -499,7 +499,7 @@ int tls_read(tls_t *tls, void * const buff, const size_t len)
 	ret = tls->sft->DecryptMessage(&(tls->hctxt), &sbddec, 0, NULL);
 
 	if (ret == SEC_E_OK) {
-	    memcpy(tls->readybuffer, sbdec[1].pvBuffer, sbdec[1].cbBuffer); 
+	    memcpy(tls->readybuffer, sbdec[1].pvBuffer, sbdec[1].cbBuffer);
 	    tls->readybufferpos = 0;
 	    tls->readybufferlen = sbdec[1].cbBuffer;
 	    /* have we got some data left over?  If so, copy it to the start
@@ -631,8 +631,8 @@ int tls_write(tls_t *tls, const void * const buff, const size_t len)
 
 	if (ret == -1 && !tls_is_recoverable(tls_error(tls))) {
 	    return -1;
-	} 
-	
+	}
+
 	if (remain > tls->spcss.cbMaximumMessage) {
 	    sent += tls->spcss.cbMaximumMessage;
 	    remain -= tls->spcss.cbMaximumMessage;

src/util.c

@@ -24,11 +24,11 @@
 #else
 #include <sys/time.h>
 #include <time.h>
-#include <stdint.h>
 #endif
 
 #include "strophe.h"
 #include "common.h"
+#include "ostypes.h"
 #include "util.h"
 
 /** implement our own strdup that uses the ctx allocator */

src/util.h

@@ -19,11 +19,7 @@
 #ifndef __LIBSTROPHE_UTIL_H__
 #define __LIBSTROPHE_UTIL_H__
 
-#ifndef _WIN32
-#include <stdint.h>
-#else
 #include "ostypes.h"
-#endif
 
 /* timing functions */
 uint64_t time_stamp(void);