1 files changed, 210 insertions, 0 deletions
diff --git a/trunk/main/minimime/mm_base64.c b/trunk/main/minimime/mm_base64.c
new file mode 100644
index 000000000..ee6dc183b
--- /dev/null
+++ b/trunk/main/minimime/mm_base64.c
@@ -0,0 +1,210 @@
+/*
+ * Copyright (C) 2003 Jann Fischer <jfi@openbsd.de>
+ * All rights reserved.
+ *
+ * XXX: This piece of software is not nearly MIME compatible as it should be.
+ *
+ * This is based on third-party code, see the copyright notice below.
+ *
+ */
+
+/* $Id$ */
+
+/***********************************************************
+        Copyright 1998 by Carnegie Mellon University
+
+                      All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Carnegie Mellon
+University not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE FOR
+ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+******************************************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "mm_internal.h"
+
+#define XX 127
+
+static int _mm_base64_decode(char *);
+static char *_mm_base64_encode(char *, uint32_t);
+
+/*
+ * Tables for encoding/decoding base64
+ */
+static const char basis_64[] =
+   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static const char index_64[256] = {
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,62, XX,XX,XX,63,
+	52,53,54,55, 56,57,58,59, 60,61,XX,XX, XX,XX,XX,XX,
+	XX, 0, 1, 2,  3, 4, 5, 6,  7, 8, 9,10, 11,12,13,14,
+	15,16,17,18, 19,20,21,22, 23,24,25,XX, XX,XX,XX,XX,
+	XX,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
+	41,42,43,44, 45,46,47,48, 49,50,51,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+	XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+};
+#define CHAR64(c)  (index_64[(unsigned char)(c)])
+
+/*
+ * mm_base64_decode()
+ *
+ * Decodes the data pointed to by 'data' from the BASE64 encoding to the data
+ * format it was encoded from. Returns a pointer to a string on success or
+ * NULL on error. The string returned needs to be freed by the caller at some
+ * later point.
+ *
+ */
+char *
+mm_base64_decode(char *data)
+{
+	char *buf;
+
+	assert(data != NULL);
+
+	buf = mm_stripchars(data, "\r\n");
+	assert(buf != NULL);
+
+	_mm_base64_decode(buf);
+	assert(buf != NULL);
+	return(buf);
+}
+
+/*
+ * mm_base64_encode()
+ *
+ * Encodes the data pointed to by 'data', which is of the length specified in
+ * 'len' to the BASE64 format. Returns a pointer to a string containing the
+ * BASE64 encoding, whose lines are broken at the MIME recommended linelength
+ * of 76 characters. If an error occured, returns NULL. The string returned
+ * needs to be freed by the caller at some later point.
+ *
+ */
+char *
+mm_base64_encode(char *data, uint32_t len) {
+	char *buf;
+	char *ret;
+
+	assert(data != NULL);
+
+	buf = _mm_base64_encode(data, len);
+	assert(buf != NULL);
+
+	ret = mm_addchars(buf, "\r\n", MM_BASE64_LINELEN);
+	xfree(buf);
+	assert(ret != NULL);
+	return ret;
+}
+
+/*
+ * Decode in-place the base64 data in 'input'.  Returns the length
+ * of the decoded data, or -1 if there was an error.
+ */
+static int
+_mm_base64_decode(char *input)
+{
+	uint32_t len = 0;
+	unsigned char *output = (unsigned char *)input;
+	int c1, c2, c3, c4;
+
+	while (*input) {
+		c1 = *input++;
+		if (CHAR64(c1) == XX) return -1;
+		c2 = *input++;
+		if (CHAR64(c2) == XX) return -1;
+		c3 = *input++;
+		if (c3 != '=' && CHAR64(c3) == XX) return -1; 
+		c4 = *input++;
+		if (c4 != '=' && CHAR64(c4) == XX) return -1;
+		*output++ = (CHAR64(c1) << 2) | (CHAR64(c2) >> 4);
+		++len;
+		if (c3 == '=') break;
+		*output++ = ((CHAR64(c2) << 4) & 0xf0) | (CHAR64(c3) >> 2);
+		++len;
+		if (c4 == '=') break;
+		*output++ = ((CHAR64(c3) << 6) & 0xc0) | CHAR64(c4);
+		++len;
+	}
+	*output = 0;
+
+	return len;
+}
+
+/*
+ * Encode the given binary string of length 'len' and return Base64
+ * in a char buffer.  It allocates the space for buffer.
+ * caller must free the space.
+ */
+static char *
+_mm_base64_encode(char *data, uint32_t len)
+{
+	char *buf;
+	uint32_t buflen;
+	int c1;
+	int c2;
+	int c3;
+	uint32_t maxbuf;
+
+	buflen = 0;
+
+#ifdef RUBBISH
+	maxbuf = len*4/3 + 1;  /* size after expantion */
+#endif
+	maxbuf = len*2 + 20;  /* size after expantion */
+
+	buf = (char *)xmalloc(maxbuf);
+
+	while (len && buflen < (maxbuf - 6)) {
+
+		c1 = (unsigned char)*data++;
+		buf[buflen++] = basis_64[c1>>2];
+
+		if (--len == 0) c2 = 0;
+		else c2 = (unsigned char)*data++;
+		buf[buflen++] = basis_64[((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4)];
+
+		if (len == 0) {
+			buf[buflen++] = '=';
+			buf[buflen++] = '=';
+			break;
+		}
+
+		if (--len == 0) c3 = 0;
+		else c3 = (unsigned char)*data++;
+
+		buf[buflen++] = basis_64[((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6)];
+		if (len == 0) {
+			buf[buflen++] = '=';
+
+			break;
+		}
+
+		--len;
+		buf[buflen++] = basis_64[c3 & 0x3F];
+	}
+
+	buf[buflen]=0;
+	return buf;
+}