The class IBase64Buf is a class template, using a FBB::CryptType template non-type parameter. Objects of the class FBB::IBase64Buf<FBB::ENCRYPT> base64 encode the information they receive, objects of the class FBB::IBase64Buf<FBB::DECRYPT> base64 decode the information they receive. See also section ENUMERATION below.
IBase64Buf objects either base64 encode or decode information. IBase64Buf objects of the class FBB::IBase64Buf<FBB::ENCRYPT> base64 encode the data they receive, IBase64Buf objects of the class FBB::IBase64Buf<FBB::DECRYPT> base64 decode the data they receive.
The values ENCRYPT and DECRYPT are defined in the enum CryptType, which is defined in the FBB namespace.
- IBase64Buf<ENCRYPT> objects perform base64 encoding;
- IBase64Buf<DECRYPT> objects perform base64 decoding;
- IBase64Buf<CryptType> objects obtain the bytes to encode or
decode from std::istream ∈
- The IFilterBuf base class is initialized with a buffer of
size bufSize, using a lower bound of 100.
The constructor uses a configurable buffer size for reading. Characters that were read into the buffer but are not part of the actual base64 encoded data are unavailable after completing the base64 decrypting. If information beyond the base64 input block should remain available, then specify a buffer size of 1.
Copy and move constructors (and assignment operators) are not available.
The example shows the construction of IBase64Buf<ENCRYPT> objects encode which are used to initialize a std::istream object. The information read from this istream is base64 encoded.
IBase64Buf<DECRYPT> objects (decode reads base64 encoded information from std::istream objects and decodes it again).
The std::istream din object is initialized with the IBase64Buf<DECRYPT> object, and its content is sent to std::cout. The information that is presented at std::cin and that appears at std::cout should be identical.
#include <iostream>
#include <istream>
#include <bobcat/ibase64buf>
using namespace std;
using namespace FBB;
int main(int argc, char **argv)
{
switch (argv[1][0])
{
case 'e':
{
IBase64Buf<ENCRYPT> encode(cin);
istream ein(&encode);
cout << ein.rdbuf();
}
break;
case 'd':
{
IBase64Buf<DECRYPT> decode(cin);
istream din(&decode);
cout << din.rdbuf();
}
break;
case 'b':
{
IBase64Buf<ENCRYPT> encode(cin);
istream ein(&encode);
IBase64Buf<DECRYPT> decode(ein);
istream din(&decode);
cout << din.rdbuf();
}
break;
default:
cout << "Usage: " << argv[0] << " [edb] < infile > outfile\n"
"to base64 -e-ncode, -d-ecode or -b-oth\n";
break;
}
}