Merge pull request #14888 from Faless/websocket

Websocket module

1 files changed, 206 insertions, 0 deletions

diff --git a/thirdparty/lws/misc/base64-decode.c b/thirdparty/lws/misc/base64-decode.c
new file mode 100644
index 0000000000..c8f11d21b8
--- /dev/null
+++ b/thirdparty/lws/misc/base64-decode.c
@@ -0,0 +1,206 @@
+/*
+ * This code originally came from here
+ *
+ * http://base64.sourceforge.net/b64.c
+ *
+ * with the following license:
+ *
+ * LICENCE:        Copyright (c) 2001 Bob Trower, Trantor Standard Systems Inc.
+ *
+ *                Permission is hereby granted, free of charge, to any person
+ *                obtaining a copy of this software and associated
+ *                documentation files (the "Software"), to deal in the
+ *                Software without restriction, including without limitation
+ *                the rights to use, copy, modify, merge, publish, distribute,
+ *                sublicense, and/or sell copies of the Software, and to
+ *                permit persons to whom the Software is furnished to do so,
+ *                subject to the following conditions:
+ *
+ *                The above copyright notice and this permission notice shall
+ *                be included in all copies or substantial portions of the
+ *                Software.
+ *
+ *                THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+ *                KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ *                WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ *                PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+ *                OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ *                OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ *                OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ *                SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * VERSION HISTORY:
+ *               Bob Trower 08/04/01 -- Create Version 0.00.00B
+ *
+ * I cleaned it up quite a bit to match the (linux kernel) style of the rest
+ * of libwebsockets; this version is under LGPL2.1 + SLE like the rest of lws
+ * since he explicitly allows sublicensing, but I give the URL above so you can
+ * get the original with Bob's super-liberal terms directly if you prefer.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "private-libwebsockets.h"
+
+static const char encode[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+			     "abcdefghijklmnopqrstuvwxyz0123456789+/";
+static const char decode[] = "|$$$}rstuvwxyz{$$$$$$$>?@ABCDEFGHIJKLMNOPQRSTUVW"
+			     "$$$$$$XYZ[\\]^_`abcdefghijklmnopq";
+
+LWS_VISIBLE int
+lws_b64_encode_string(const char *in, int in_len, char *out, int out_size)
+{
+	unsigned char triple[3];
+	int i;
+	int len;
+	int line = 0;
+	int done = 0;
+
+	while (in_len) {
+		len = 0;
+		for (i = 0; i < 3; i++) {
+			if (in_len) {
+				triple[i] = *in++;
+				len++;
+				in_len--;
+			} else
+				triple[i] = 0;
+		}
+
+		if (done + 4 >= out_size)
+			return -1;
+
+		*out++ = encode[triple[0] >> 2];
+		*out++ = encode[((triple[0] & 0x03) << 4) |
+					     ((triple[1] & 0xf0) >> 4)];
+		*out++ = (len > 1 ? encode[((triple[1] & 0x0f) << 2) |
+					     ((triple[2] & 0xc0) >> 6)] : '=');
+		*out++ = (len > 2 ? encode[triple[2] & 0x3f] : '=');
+
+		done += 4;
+		line += 4;
+	}
+
+	if (done + 1 >= out_size)
+		return -1;
+
+	*out++ = '\0';
+
+	return done;
+}
+
+/*
+ * returns length of decoded string in out, or -1 if out was too small
+ * according to out_size
+ */
+
+LWS_VISIBLE int
+lws_b64_decode_string(const char *in, char *out, int out_size)
+{
+	int len, i, c = 0, done = 0;
+	unsigned char v, quad[4];
+
+	while (*in) {
+
+		len = 0;
+		for (i = 0; i < 4 && *in; i++) {
+
+			v = 0;
+			c = 0;
+			while (*in && !v) {
+				c = v = *in++;
+				v = (v < 43 || v > 122) ? 0 : decode[v - 43];
+				if (v)
+					v = (v == '$') ? 0 : v - 61;
+			}
+			if (c) {
+				len++;
+				if (v)
+					quad[i] = v - 1;
+			} else
+				quad[i] = 0;
+		}
+
+		if (out_size < (done + len - 1))
+			/* out buffer is too small */
+			return -1;
+
+		/*
+		 * "The '==' sequence indicates that the last group contained
+		 * only one byte, and '=' indicates that it contained two
+		 * bytes." (wikipedia)
+		 */
+
+		if (!*in && c == '=')
+			len--;
+
+		if (len >= 2)
+			*out++ = quad[0] << 2 | quad[1] >> 4;
+		if (len >= 3)
+			*out++ = quad[1] << 4 | quad[2] >> 2;
+		if (len >= 4)
+			*out++ = ((quad[2] << 6) & 0xc0) | quad[3];
+
+		done += len - 1;
+	}
+
+	if (done + 1 >= out_size)
+		return -1;
+
+	*out = '\0';
+
+	return done;
+}
+
+#if 0
+int
+lws_b64_selftest(void)
+{
+	char buf[64];
+	unsigned int n,  r = 0;
+	unsigned int test;
+	/* examples from https://en.wikipedia.org/wiki/Base64 */
+	static const char * const plaintext[] = {
+		"any carnal pleasure.",
+		"any carnal pleasure",
+		"any carnal pleasur",
+		"any carnal pleasu",
+		"any carnal pleas",
+		"Admin:kloikloi"
+	};
+	static const char * const coded[] = {
+		"YW55IGNhcm5hbCBwbGVhc3VyZS4=",
+		"YW55IGNhcm5hbCBwbGVhc3VyZQ==",
+		"YW55IGNhcm5hbCBwbGVhc3Vy",
+		"YW55IGNhcm5hbCBwbGVhc3U=",
+		"YW55IGNhcm5hbCBwbGVhcw==",
+		"QWRtaW46a2xvaWtsb2k="
+	};
+
+	for (test = 0; test < sizeof plaintext / sizeof(plaintext[0]); test++) {
+
+		buf[sizeof(buf) - 1] = '\0';
+		n = lws_b64_encode_string(plaintext[test],
+				      strlen(plaintext[test]), buf, sizeof buf);
+		if (n != strlen(coded[test]) || strcmp(buf, coded[test])) {
+			lwsl_err("Failed lws_b64 encode selftest "
+					   "%d result '%s' %d\n", test, buf, n);
+			r = -1;
+		}
+
+		buf[sizeof(buf) - 1] = '\0';
+		n = lws_b64_decode_string(coded[test], buf, sizeof buf);
+		if (n != strlen(plaintext[test]) ||
+						 strcmp(buf, plaintext[test])) {
+			lwsl_err("Failed lws_b64 decode selftest "
+				 "%d result '%s' / '%s', %d / %d\n",
+				 test, buf, plaintext[test], n, strlen(plaintext[test]));
+			r = -1;
+		}
+	}
+
+	lwsl_notice("Base 64 selftests passed\n");
+
+	return r;
+}
+#endif