From a613be3e96570be219bb22304c53bbe964fca257 Mon Sep 17 00:00:00 2001
From: Moriyoshi Koizumi <moriyoshi@php.net>
Date: Wed, 23 Mar 2005 23:22:55 +0000
Subject: [PATCH] - MFH: fix bug #32311 (mb_encode_mimeheader() does not
 properly escape   characters).

---
 ext/mbstring/libmbfl/mbfl/mbfilter.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/ext/mbstring/libmbfl/mbfl/mbfilter.c b/ext/mbstring/libmbfl/mbfl/mbfilter.c
index a33991058c..ee1762e38e 100644
--- a/ext/mbstring/libmbfl/mbfl/mbfilter.c
+++ b/ext/mbstring/libmbfl/mbfl/mbfilter.c
@@ -1960,6 +1960,25 @@ mime_header_encoder_block_collector(int c, void *data)
 static int
 mime_header_encoder_collector(int c, void *data)
 {
+	static int qp_table[256] = {
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x00 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x00 */
+		1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
+		0, 0, 0, 0, 0, 0, 0 ,0, 0, 0, 0, 0, 0, 1, 0, 1, /* 0x10 */
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x40 */
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* 0x50 */
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60 */
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* 0x70 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x80 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x90 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xA0 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xB0 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xC0 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xD0 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xE0 */
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1  /* 0xF0 */
+	};
+
 	int n;
 	struct mime_header_encoder_data *pe = (struct mime_header_encoder_data *)data;
 
@@ -1969,7 +1988,7 @@ mime_header_encoder_collector(int c, void *data)
 		break;
 
 	default:	/* ASCII */
-		if (c >= 0x21 && c < 0x7f) {	/* ASCII exclude SPACE and CTLs */
+		if (!qp_table[(c & 0xff)]) { /* ordinary characters */
 			mbfl_memory_device_output(c, &pe->tmpdev);
 			pe->status1 = 1;
 		} else if (pe->status1 == 0 && c == 0x20) {	/* repeat SPACE */
-- 
2.40.0