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sha.cpp
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/
sha.cpp
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#include <sstream>
#include <iomanip>
#include <stdexcept>
#include "sha.h"
Sha::Sha(const std::string& type):mdctx(nullptr)
{
reset();
}
Sha::~Sha()
{
if(mdctx != nullptr)
{
EVP_MD_CTX_destroy(mdctx);
mdctx = nullptr;
}
}
void Sha::reset()
{
if(mdctx != nullptr)
{
EVP_MD_CTX_destroy(mdctx);
mdctx = nullptr;
}
mdctx = EVP_MD_CTX_create();
EVP_DigestInit_ex(mdctx, EVP_sha512(), NULL);
}
void Sha::reset(const void* data, unsigned size)
{
reset();
update(data, size);
}
void Sha::update(const void* data, unsigned size)
{
EVP_DigestUpdate(mdctx, data, size);
}
std::string Sha::print()
{
EVP_DigestFinal_ex(mdctx, md_value, &md_len);
std::stringstream ss;
for (int i(0); i < md_len; ++i)
ss << std::hex << std::setfill('0') << std::setw(2) << (int)md_value[i];
return ss.str();
}