CryptoDigestGCrypt.cpp [plain text]
#include "config.h"
#include "CryptoDigest.h"
#include <gcrypt.h>
namespace PAL {
struct CryptoDigestContext {
int algorithm;
gcry_md_hd_t md;
};
CryptoDigest::CryptoDigest()
: m_context(new CryptoDigestContext)
{
}
CryptoDigest::~CryptoDigest() = default;
std::unique_ptr<CryptoDigest> CryptoDigest::create(CryptoDigest::Algorithm algorithm)
{
int gcryptAlgorithm;
switch (algorithm) {
case CryptoDigest::Algorithm::SHA_1:
gcryptAlgorithm = GCRY_MD_SHA1;
break;
case CryptoDigest::Algorithm::SHA_224:
gcryptAlgorithm = GCRY_MD_SHA224;
break;
case CryptoDigest::Algorithm::SHA_256:
gcryptAlgorithm = GCRY_MD_SHA256;
break;
case CryptoDigest::Algorithm::SHA_384:
gcryptAlgorithm = GCRY_MD_SHA384;
break;
case CryptoDigest::Algorithm::SHA_512:
gcryptAlgorithm = GCRY_MD_SHA512;
break;
}
std::unique_ptr<CryptoDigest> digest(new CryptoDigest);
digest->m_context->algorithm = gcryptAlgorithm;
gcry_md_open(&digest->m_context->md, gcryptAlgorithm, 0);
if (!digest->m_context->md)
return nullptr;
return digest;
}
void CryptoDigest::addBytes(const void* input, size_t length)
{
gcry_md_write(m_context->md, input, length);
}
Vector<uint8_t> CryptoDigest::computeHash()
{
int digestLen = gcry_md_get_algo_dlen(m_context->algorithm);
Vector<uint8_t> result(digestLen);
gcry_md_final(m_context->md);
memcpy(result.data(), gcry_md_read(m_context->md, 0), digestLen);
gcry_md_close(m_context->md);
return result;
}
}