From 960d08c643faa503f0cdc57e8754dcf740e58f0b Mon Sep 17 00:00:00 2001
From: onefang
Date: Thu, 23 Apr 2020 01:01:04 +1000
Subject: Fix up Base64 encoding / decoding to actually work.

---
 src/sledjchisl/sledjchisl.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/sledjchisl/sledjchisl.c b/src/sledjchisl/sledjchisl.c
index 87aac15..cc11565 100644
--- a/src/sledjchisl/sledjchisl.c
+++ b/src/sledjchisl/sledjchisl.c
@@ -83,7 +83,7 @@ GLOBALS(
 
 
 
-// Duplicate some small amount of code from qLibc, coz / and = are not good choices, and the standard says we can pick those.
+// Duplicate some small amount of code from qLibc, coz /, + and, = are not good choices, and the standard says we can pick those.
 /**
  * Encode data using BASE64 algorithm.
  *
@@ -118,8 +118,7 @@ char *qB64_encode(const void *bin, size_t size) {
         'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P', // 00-0F
         'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f', // 10-1F
         'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v', // 20-2F
-//        'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'  // 30-3F
-        'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','_'  // 30-3F
+        'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'  // 30-3F
     };
 
     if (size == 0) {
@@ -151,15 +150,17 @@ char *qB64_encode(const void *bin, size_t size) {
                 (nIdxOfThree >= 1) ?
                         B64CHARTBL[(((szIn[1] & 0x0F) << 2)
                                 | ((szIn[2] & 0xC0) >> 6))] :
-//                        '=';
-                        '-';
-//        *pszB64Pt++ = (nIdxOfThree >= 2) ? B64CHARTBL[(szIn[2] & 0x3F)] : '=';
-        *pszB64Pt++ = (nIdxOfThree >= 2) ? B64CHARTBL[(szIn[2] & 0x3F)] : '-';
+                        '=';
+        *pszB64Pt++ = (nIdxOfThree >= 2) ? B64CHARTBL[(szIn[2] & 0x3F)] : '=';
 
         memset((void *) szIn, 0, sizeof(szIn));
     }
     *pszB64Pt = '\0';
 
+    pszB64 = qstrreplace("tr", pszB64, "+", "~");
+    pszB64 = qstrreplace("tr", pszB64, "/", "_");
+    pszB64 = qstrreplace("tr", pszB64, "=", "^");
+
     return pszB64;
 }
 
@@ -180,11 +181,11 @@ size_t qB64_decode(char *str) {
         64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,  // 00-0F
         64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,  // 10-1F
         64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64, 64, 64, 63,  // 20-2F
-        52, 53, 54, 55, 56, 57, 58, 59, 60, 45, 64, 64, 64, 64, 64, 64,  // 30-3F
+        52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64,  // 30-3F
         64,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,  // 40-4F
         15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64,  // 50-5F
         64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,  // 60-6F
-        41, 42, 43, 44, 45, 46, 95, 48, 49, 50, 51, 64, 64, 64, 64, 64,  // 70-7F
+        41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64,  // 70-7F
         64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,  // 80-8F
         64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,  // 90-9F
         64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,  // A0-AF
@@ -195,6 +196,10 @@ size_t qB64_decode(char *str) {
         64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64   // F0-FF
     };
 
+    str = qstrreplace("tr", str, "~", "+");
+    str = qstrreplace("tr", str, "_", "/");
+    str = qstrreplace("tr", str, "^", "=");
+
     char *pEncPt, *pBinPt = str;
     int nIdxOfFour = 0;
     char cLastByte = 0;
-- 
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