File: setiv.cc

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#include "decryptbuf.ih"

void DecryptBuf::setIv(string iv)
{
    if (d_pimpl->active)
        throw Errno(1, "Can't change IV during encryption");

    if (iv.empty())
        throw Errno(1, 
            "Decryptbuf::setIV: initialization vector cannot be empty");

    iv.resize(EVP_MAX_IV_LENGTH);

    if 
    (
        !EVP_EncryptInit_ex(&d_pimpl->ctx, 0, 0, 0,
            reinterpret_cast<unsigned char const *>(iv.data()))
    )
        throw Errno(1, "Couldn't set IV");
}