http: split out auth code since it's mostly uninteresting for now

The auth code also has some ugly usages of string generation
which I will eventually replace with something nicer...

git-svn-id: https://svn.musicpd.org/mpd/trunk@7387 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 101 insertions, 0 deletions

diff --git a/src/inputStream_http_auth.h b/src/inputStream_http_auth.h
new file mode 100644
index 000000000..db4fb4584
--- /dev/null
+++ b/src/inputStream_http_auth.h
@@ -0,0 +1,101 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * This project's homepage is: http://www.musicpd.org
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/* This file is only included by inputStream_http.c */
+#ifndef INPUT_STREAM_HTTP_AUTH_H
+#define INPUT_STREAM_HTTP_AUTH_H
+
+#include "os_compat.h"
+#include "utils.h"
+
+/* base64 code taken from xmms */
+
+#define BASE64_LENGTH(len) (4 * (((len) + 2) / 3))
+
+static char *base64Dup(char *s)
+{
+	int i;
+	int len = strlen(s);
+	char *ret = xcalloc(BASE64_LENGTH(len) + 1, 1);
+	unsigned char *p = (unsigned char *)ret;
+
+	static const char tbl[64] = {
+		'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+		'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+		'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+		'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+		'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+		'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+		'w', 'x', 'y', 'z', '0', '1', '2', '3',
+		'4', '5', '6', '7', '8', '9', '+', '/'
+	};
+
+	/* Transform the 3x8 bits to 4x6 bits, as required by base64.  */
+	for (i = 0; i < len; i += 3) {
+		*p++ = tbl[s[0] >> 2];
+		*p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)];
+		*p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)];
+		*p++ = tbl[s[2] & 0x3f];
+		s += 3;
+	}
+	/* Pad the result if necessary...  */
+	if (i == len + 1)
+		*(p - 1) = '=';
+	else if (i == len + 2)
+		*(p - 1) = *(p - 2) = '=';
+	/* ...and zero-terminate it.  */
+	*p = '\0';
+
+	return ret;
+}
+
+static char *authString(const char *header,
+			const char *user, const char *password)
+{
+	char *ret = NULL;
+	int templen;
+	char *temp;
+	char *temp64;
+
+	if (!user || !password)
+		return NULL;
+
+	templen = strlen(user) + strlen(password) + 2;
+	temp = xmalloc(templen);
+	strcpy(temp, user);
+	strcat(temp, ":");
+	strcat(temp, password);
+	temp64 = base64Dup(temp);
+	free(temp);
+
+	ret = xmalloc(strlen(temp64) + strlen(header) + 3);
+	strcpy(ret, header);
+	strcat(ret, temp64);
+	strcat(ret, "\r\n");
+	free(temp64);
+
+	return ret;
+}
+
+#define PROXY_AUTH_HEADER	"Proxy-Authorization: Basic "
+#define HTTP_AUTH_HEADER	"Authorization: Basic "
+
+#define proxyAuthString(x, y)	authString(PROXY_AUTH_HEADER, x, y)
+#define httpAuthString(x, y)	authString(HTTP_AUTH_HEADER, x, y)
+
+#endif /* INPUT_STREAM_HTTP_AUTH_H */