#include "MessageDigest.h"
#include <mbedtls/md.h>
#include <cstring>

class MessageDigestPrivate {
public:
    mbedtls_md_context_t context;
};

MessageDigest::MessageDigest(Type type) : m_d(new MessageDigestPrivate()) {
    mbedtls_md_init(&m_d->context);
    auto info = mbedtls_md_info_from_type(static_cast<mbedtls_md_type_t>(type));
    mbedtls_md_setup(&m_d->context, info, 1);
}

MessageDigest::~MessageDigest() {
    mbedtls_md_free(&m_d->context);
    delete m_d;
}

int MessageDigest::hmacStarts(const unsigned char *key, size_t keylen) {
    return mbedtls_md_hmac_starts(&m_d->context, key, keylen);
}

int MessageDigest::hmacUpdate(const unsigned char *input, size_t ilen) {
    return mbedtls_md_hmac_update(&m_d->context, input, ilen);
}

int MessageDigest::hmacFinish(unsigned char *output) {
    return mbedtls_md_hmac_finish(&m_d->context, output);
}