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#include "common.hh"
#include "hash_method.hh"
#include <openssl/evp.h>
namespace {
class Sha256HashMethod : public HashMethod {
public:
Sha256HashMethod() {
ctx_ = EVP_MD_CTX_new();
EVP_DigestInit_ex(ctx_, EVP_sha256(), nullptr);
}
~Sha256HashMethod() override {
EVP_MD_CTX_free(ctx_);
}
void update(void const* data, size_t count) override {
EVP_DigestUpdate(ctx_, data, count);
}
std::string finish() override {
uint8_t out[EVP_MAX_MD_SIZE];
unsigned int len;
EVP_DigestFinal_ex(ctx_, out, &len);
EVP_DigestInit_ex(ctx_, EVP_sha256(), nullptr);
return to_string(out, len);
}
private:
EVP_MD_CTX* ctx_;
};
} // namespace
std::unique_ptr<HashMethod> HashMethod::sha256() {
return std::make_unique<Sha256HashMethod>();
}
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