SHA2_native.cc
1.66 KB
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#include <qpdf/SHA2_native.hh>
#include <qpdf/QUtil.hh>
#include <cstdio>
#include <stdexcept>
SHA2_native::SHA2_native(int bits) :
bits(bits)
{
switch (bits) {
case 256:
sph_sha256_init(&ctx256);
break;
case 384:
sph_sha384_init(&ctx384);
break;
case 512:
sph_sha512_init(&ctx512);
break;
default:
badBits();
break;
}
}
void
SHA2_native::badBits()
{
throw std::logic_error("SHA2_native has bits != 256, 384, or 512");
}
void
SHA2_native::update(unsigned char const* buf, size_t len)
{
switch (bits) {
case 256:
sph_sha256(&ctx256, buf, len);
break;
case 384:
sph_sha384(&ctx384, buf, len);
break;
case 512:
sph_sha512(&ctx512, buf, len);
break;
default:
badBits();
break;
}
}
void
SHA2_native::finalize()
{
switch (bits) {
case 256:
sph_sha256_close(&ctx256, sha256sum);
break;
case 384:
sph_sha384_close(&ctx384, sha384sum);
break;
case 512:
sph_sha512_close(&ctx512, sha512sum);
break;
default:
badBits();
break;
}
}
std::string
SHA2_native::getRawDigest()
{
std::string result;
switch (bits) {
case 256:
result = std::string(reinterpret_cast<char*>(sha256sum), sizeof(sha256sum));
break;
case 384:
result = std::string(reinterpret_cast<char*>(sha384sum), sizeof(sha384sum));
break;
case 512:
result = std::string(reinterpret_cast<char*>(sha512sum), sizeof(sha512sum));
break;
default:
badBits();
break;
}
return result;
}