/**
* Decodes a BASE64 encoded data block. Returns True if string has been
* successfully decoded, or False if it cannot be decoded (or memory
* allocation fails). The len parameter is negative if the amount of
* data is unknown in advance.
*/
STATIC Bool BASE64_DecodeFile2(File * in, size_t len, Buffer * out,
const I8u * map)
{
Base64Decode decode;
/* pre-allocate memory in the output buffer */
if (out && len > 0) {
size_t nbytes = 3*len/4;
if (len%4) nbytes++;
if (!BUFFER_EnsureCapacity(out, BUFFER_Size(out) + nbytes, False)) {
return False;
}
}
/* initialize the context */
decode.in = in;
decode.nread = 0;
decode.out = out;
if (map) {
decode.decodeMap = map;
decode.flags = 0;
} else {
decode.decodeMap = base64_decodeMap;
decode.flags = FLAG_DETECT;
}
/* run the decoder */
return BASE64_InternalDecode(&decode);
}
/**
* Decodes a BASE32 encoded data block. Returns True if string has been
* successfully decoded, or False if it cannot be decoded (or memory
* allocation fails). The len parameter is negative if the amount of
* data is unknown in advance.
*/
STATIC Bool BASE32_DecodeFile2(File * in,int len,Buffer * out,const I8u * map)
{
Base32Decode decode;
/* pre-allocate maximum amount of memory for the output buffer */
if (out && len > 0) {
int nbytes = ENCODE_CHUNK_SIZE*(len/DECODE_CHUNK_SIZE);
switch (len % DECODE_CHUNK_SIZE) {
case 0:
case 1:
break;
case 2:
case 3:
nbytes++;
/* NOBREAK */
case 4:
nbytes++;
/* NOBREAK */
case 5:
case 6:
nbytes++;
/* NOBREAK */
case 7:
nbytes++;
break;
}
if (!BUFFER_EnsureCapacity(out, BUFFER_Size(out) + nbytes, False)) {
return False;
}
}
/* initialize the context */
decode.in = in;
decode.nread = 0;
decode.out = out;
decode.decodeMap = map;
decode.flags = 0;
/* run the decoder */
return BASE32_InternalDecode(&decode);
}
