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#include "commonheaders.h"
string base64encode(const string buf)
{
string out;
char *base64 = base64encode(buf.data(), buf.length());
out.assign(base64);
free(base64);
return out;
}
char *base64encode(const char *inBuffer, const int count) {
int srcIndex = 0, destIndex = 0, remainder = count % 3;
char *outBuffer = (char *) malloc(count*2+1);
BYTE *inBufferPtr = (BYTE *) inBuffer;
while(srcIndex < count) {
outBuffer[destIndex++] = encode64(inBufferPtr[srcIndex] >> 2);
outBuffer[destIndex++] = encode64(((inBufferPtr[srcIndex] << 4) & 0x30) | ((inBufferPtr[srcIndex + 1] >> 4) & 0x0F));
srcIndex++;
outBuffer[destIndex++] = encode64(((inBufferPtr[srcIndex] << 2) & 0x3C) | ((inBufferPtr[srcIndex + 1] >> 6) & 0x03));
srcIndex++;
outBuffer[destIndex++] = encode64(inBufferPtr[srcIndex++] & 0x3F);
}
if (remainder == 2) {
outBuffer[destIndex - 1] = BPAD;
outBuffer[destIndex - 2] = encode64((inBufferPtr[srcIndex - 2] << 2) & 0x3C);
}
else if (remainder == 1) {
outBuffer[destIndex - 2] = outBuffer[destIndex - 1] = BPAD;
outBuffer[destIndex - 3] = encode64((inBufferPtr[srcIndex - 3] << 4) & 0x30);
}
destIndex -= (3 - remainder) % 3;
outBuffer[destIndex] = '\0';
return outBuffer;
}
string base64decode(const string buf) {
string out;
size_t len = buf.length();
char *plain = base64decode(buf.data(), &len);
out.assign(plain,len);
free(plain);
return out;
}
string base64decode(const char *buf) {
string out;
size_t len = strlen(buf);
char *plain = base64decode(buf, &len);
out.assign(plain,len);
free(plain);
return out;
}
char *base64decode(const char *inBuffer, size_t *count) {
int srcIndex = 0, destIndex = 0;
char *outBuffer = (char *) malloc(*count);
while(srcIndex < *count) {
BYTE c0, c1, c2 = 0, c3 = 0;
const size_t delta = *count - srcIndex;
c0 = decode64(inBuffer[srcIndex++]);
c1 = decode64(inBuffer[srcIndex++]);
if (delta > 2) {
c2 = decode64(inBuffer[srcIndex++]);
if (delta > 3)
c3 = decode64(inBuffer[srcIndex++]);
}
if ((c0 | c1 | c2 | c3) == BERR) {
free(outBuffer);
return(NULL);
}
outBuffer[destIndex++] = (c0 << 2) | (c1 >> 4);
if (delta > 2) {
outBuffer[destIndex++] = (c1 << 4) | (c2 >> 2);
if (delta > 3 )
outBuffer[destIndex++] = (c2 << 6) | (c3);
}
}
outBuffer[destIndex] = '\0';
*count = destIndex;
return outBuffer;
}
// EOF
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