Method encryptWithAd

libs/utils/src/utils/crypto/AesEncryptor.cpp:44–76

}

std::optional<std::vector<uint8_t>> AesEncryptor::encryptWithAd(const uint8_t* plainText,
                                                                size_t len,
                                                                const uint8_t* additionalData,
                                                                size_t adLen) {
    SC_ASSERT_NOTNULL(plainText);
    SC_ASSERT(len > 0);
    EVP_AEAD_CTX ctx;
    if (EVP_AEAD_CTX_init(&ctx, _cipher, _key.data(), _key.size(), EVP_AEAD_max_tag_len(_cipher), nullptr) == 0) {
        SCLOGE(kTag, "Failed to initialize encryption key");
        logCryptoErrors();
        SC_ASSERT(false, "Bad key");
        return {};
    }
    std::vector<uint8_t> cipherText(len + EVP_AEAD_max_overhead(_cipher), 0);
    size_t outLen;
    if (EVP_AEAD_CTX_seal(&ctx,
                          cipherText.data(),
                          &outLen,
                          cipherText.capacity(),
                          _iv.data(),
                          _iv.size(),
                          plainText,
                          len,
                          additionalData,
                          adLen) == 0) {
        SCLOGE(kTag, "Failed encryption");
        logCryptoErrors();
        return {};
    }
    SC_ASSERT(outLen == cipherText.size());
    EVP_AEAD_CTX_cleanup(&ctx);
    return {cipherText};
}

std::optional<std::vector<uint8_t>> AesEncryptor::decryptWithAd(const uint8_t* cipherText,
                                                                size_t len,