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Refactor Base64 functions, encode/decode using OpenSSL's EVP interface

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Our own implementation works fine, however we should use OpenSSL's one since we already link to the library.

Base64Decode() and Base64Encode() return the required buffer size when "dst" is NULL.

This allows to efficiently allocate a buffer, without wasting memory or risking an overflow.

Base64FromBin() and Base64ToBin() perform all steps, returning a heap-allocated buffer with the data in it.
This commit is contained in:
Davide Beatrici
2021-07-02 09:24:41 +02:00
parent 03d67fd5b1
commit 233e28f38c
14 changed files with 224 additions and 369 deletions
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23
src/Mayaqua/Cfg.c
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@ -7,6 +7,7 @@
#include "Cfg.h"
#include "Encoding.h"
#include "FileIO.h"
#include "Internat.h"
#include "Memory.h"
@ -746,12 +747,18 @@ bool CfgReadNextTextBUF(BUF *b, FOLDER *current)
if (!StrCmpi(token->Token[0], TAG_BYTE))
{
// byte
char *unescaped_b64 = CfgUnescape(data);
void *tmp = Malloc(StrLen(unescaped_b64) * 4 + 64);
int size = B64_Decode(tmp, unescaped_b64, StrLen(unescaped_b64));
CfgAddByte(current, name, tmp, size);
Free(tmp);
Free(unescaped_b64);
char *base64 = CfgUnescape(data);
const UINT base64_size = StrLen(base64);
UINT bin_size;
void *bin = Base64ToBin(&bin_size, base64, base64_size);
if (bin != NULL)
{
CfgAddByte(current, name, bin, bin_size);
Free(bin);
}
Free(base64);
}
Free(name);
@ -1162,9 +1169,7 @@ void CfgAddItemText(BUF *b, ITEM *t, UINT depth)
break;
case ITEM_TYPE_BYTE:
data = ZeroMalloc(t->size * 4 + 32);
len = B64_Encode(data, t->Buf, t->size);
data[len] = 0;
data = Base64FromBin(NULL, t->Buf, t->size);
break;
case ITEM_TYPE_STRING: