move base64 code into own file

rofl0r · rofl0r · commit af1d7ab510f8 · 2018-02-06T16:57:02.000Z
it will be needed to add support for upstream proxy auth.
diff --git a/src/Makefile.am b/src/Makefile.am
@@ -48,6 +48,7 @@ tinyproxy_SOURCES = \
 	vector.c vector.h \
 	upstream.c upstream.h \
 	basicauth.c basicauth.h \
+	base64.c base64.h \
 	connect-ports.c connect-ports.h
 
 EXTRA_tinyproxy_SOURCES = filter.c filter.h \
diff --git a/src/base64.c b/src/base64.c
@@ -0,0 +1,57 @@
+/* tinyproxy - A fast light-weight HTTP proxy
+ * this file Copyright (C) 2016-2018 rofl0r
+ *
+ * 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 02110-1301 USA.
+ */
+
+#include "base64.h"
+
+static const char base64_tbl[64] =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+/*
+   rofl0r's base64 impl (taken from libulz)
+   takes count bytes from src, writing base64 encoded string into dst.
+   dst needs to be at least BASE64ENC_BYTES(count) + 1 bytes in size.
+   the string in dst will be zero-terminated.
+   */
+void base64enc(char *dst, const void* src, size_t count)
+{
+	unsigned const char *s = src;
+	char* d = dst;
+	while(count) {
+		int i = 0,  n = *s << 16;
+		s++;
+		count--;
+		if(count) {
+			n |= *s << 8;
+			s++;
+			count--;
+			i++;
+		}
+		if(count) {
+			n |= *s;
+			s++;
+			count--;
+			i++;
+		}
+		*d++ = base64_tbl[(n >> 18) & 0x3f];
+		*d++ = base64_tbl[(n >> 12) & 0x3f];
+		*d++ = i ? base64_tbl[(n >> 6) & 0x3f] : '=';
+		*d++ = i == 2 ? base64_tbl[n & 0x3f] : '=';
+	}
+	*d = 0;
+}
+
diff --git a/src/base64.h b/src/base64.h
@@ -0,0 +1,29 @@
+/* tinyproxy - A fast light-weight HTTP proxy
+ * this file Copyright (C) 2016-2018 rofl0r
+ *
+ * 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 02110-1301 USA.
+ */
+
+#ifndef TINYPROXY_BASE64_H
+#define TINYPROXY_BASE64_H
+
+#include <stddef.h>
+
+/* calculates number of bytes base64-encoded stream of N bytes will take. */
+#define BASE64ENC_BYTES(N) (((N+2)/3)*4)
+void base64enc(char *dst, const void* src, size_t count);
+
+#endif
+
diff --git a/src/basicauth.c b/src/basicauth.c
@@ -24,41 +24,7 @@
 #include "html-error.h"
 #include "log.h"
 #include "conf.h"
-
-/* calculates number of bytes base64-encoded stream of N bytes will take. */
-#define BASE64ENC_BYTES(N) (((N+2)/3)*4)
-
-static const char base64_tbl[64] =
-	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-/* my own base64 impl (taken from libulz) */
-static void base64enc(char *dst, const void* src, size_t count)
-{
-	unsigned const char *s = src;
-	char* d = dst;
-	while(count) {
-		int i = 0,  n = *s << 16;
-		s++;
-		count--;
-		if(count) {
-			n |= *s << 8;
-			s++;
-			count--;
-			i++;
-		}
-		if(count) {
-			n |= *s;
-			s++;
-			count--;
-			i++;
-		}
-		*d++ = base64_tbl[(n >> 18) & 0x3f];
-		*d++ = base64_tbl[(n >> 12) & 0x3f];
-		*d++ = i ? base64_tbl[(n >> 6) & 0x3f] : '=';
-		*d++ = i == 2 ? base64_tbl[n & 0x3f] : '=';
-	}
-	*d = 0;
-}
+#include "base64.h"
 
 /*
  * Add entry to the basicauth list
