Method ReadMem

src/twcrypto/keyfile.cpp:266–306

// exception if keys are not currently loaded.

void cKeyFile::ReadMem(const int8* pMem) // throw eKeyFile()
{
    int16 i16;
    int32 i32;

    ReleaseMem();

    memcpy(&i32, pMem, sizeof(i32));
    if ((unsigned int)tw_ntohl(i32) != KEY_MAGIC_NUMBER)
        throw eKeyFileInvalidFmt();
    pMem += sizeof(int32);

    memcpy(&i32, pMem, sizeof(i32));
    if (tw_ntohl(i32) != 1) // version check
        throw eKeyFileInvalidFmt();
    pMem += sizeof(int32);

    memcpy(&i16, pMem, sizeof(i16));
    int16 len = tw_ntohs(i16);
    if (len <= 0 || len > 9000)
    {
        ASSERT(false);
        throw eKeyFileInvalidFmt();
    }

    mpPublicKey = new cElGamalSigPublicKey((void*)(pMem + sizeof(int16)));
    pMem += sizeof(int16) + len;

    memcpy(&i16, pMem, sizeof(i16));
    mPrivateKeyMemLen = tw_ntohs(i16);
    if (mPrivateKeyMemLen <= 0 || mPrivateKeyMemLen > 9000)
    {
        ASSERT(false);
        delete mpPublicKey;
        mpPublicKey = 0;
        throw eKeyFileInvalidFmt();
    }

    mpPrivateKeyMem = new int8[mPrivateKeyMemLen];
    memcpy(mpPrivateKeyMem, pMem + sizeof(int16), mPrivateKeyMemLen);
}

void cKeyFile::WriteMem(int8* pMem) const // throw eKeyFile()
{