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How to use _validate_grant method in localstack

Best Python code snippet using localstack_python
provider.py
Source:provider.py
...131    @handler("CreateGrant", expand=False)132    def create_grant(133        self, context: RequestContext, create_grant_request: CreateGrantRequest134    ) -> CreateGrantResponse:135        self._validate_grant(create_grant_request)136        region_details = KMSBackend.get()137        grant = dict(create_grant_request)138        grant[GRANT_ID] = long_uid()139        grant[GRANT_TOKENS] = [long_uid()]140        if NAME not in grant:141            grant[NAME] = ""142        grant[CREATION_DATE] = time.time()143        region_details.grants[grant[GRANT_ID]] = grant144        return CreateGrantResponse(GrantId=grant[GRANT_ID], GrantToken=grant[GRANT_TOKENS][0])145    @handler("ListGrants", expand=False)146    def list_grants(147        self, context: RequestContext, list_grants_request: ListGrantsRequest148    ) -> ListGrantsResponse:149        key_id = list_grants_request.get(KEY_ID)150        if not key_id:151            raise ValidationError(f"Required input parameter '{KEY_ID}' not specified")152        region_details = KMSBackend.get()153        self._verify_key_exists(key_id)154        limit = list_grants_request.get("Limit", 50)155        if "Marker" in list_grants_request:156            filtered = region_details.markers.get(list_grants_request["Marker"], [])157        else:158            filtered = [159                grant160                for grant in region_details.grants.values()161                if grant[KEY_ID] == key_id162                and filter_grant_id(grant, list_grants_request)163                and filter_grantee_principal(grant, list_grants_request)164            ]165        # filter out attributes166        filtered = [remove_attributes(dict(grant), ["GrantTokens"]) for grant in filtered]167        if len(filtered) <= limit:168            return ListGrantsResponse(Grants=filtered, Truncated=False)169        in_limit = filtered[:limit]170        out_limit = filtered[limit:]171        marker_id = long_uid()172        region_details.markers[marker_id] = out_limit173        return ListGrantsResponse(Grants=in_limit, Truncated=True, NextMarker=marker_id)174    def revoke_grant(175        self, context: RequestContext, key_id: KeyIdType, grant_id: GrantIdType176    ) -> None:177        grants = KMSBackend.get().grants178        if grants[grant_id][KEY_ID] != key_id:179            raise ValidationError(f"Invalid {KEY_ID}={key_id} specified for grant {grant_id}")180        grants.pop(grant_id)181    def retire_grant(182        self,183        context: RequestContext,184        grant_token: GrantTokenType = None,185        key_id: KeyIdType = None,186        grant_id: GrantIdType = None,187    ) -> None:188        region_details = KMSBackend.get()189        grants = region_details.grants190        if grant_id and grants[grant_id][KEY_ID] == key_id:191            grants.pop(grant_id)192        elif grant_token:193            region_details.grants = {194                grant_id: grant195                for grant_id, grant in grants.items()196                if grant_token not in grant[GRANT_TOKENS]197            }198        else:199            raise InvalidGrantTokenException("Grant token OR (grant ID, key ID) must be specified")200    def list_retirable_grants(201        self,202        context: RequestContext,203        retiring_principal: PrincipalIdType,204        limit: LimitType = None,205        marker: MarkerType = None,206    ) -> ListGrantsResponse:207        region_details = KMSBackend.get()208        grants = region_details.grants209        if not retiring_principal:210            raise ValidationError(f"Required input parameter '{RETIRING_PRINCIPAL}' not specified")211        limit = limit or 50212        if marker:213            markers = region_details.markers214            filtered = markers.get(marker, [])215        else:216            filtered = [217                grant218                for grant in grants.values()219                if RETIRING_PRINCIPAL in grant and grant[RETIRING_PRINCIPAL] == retiring_principal220            ]221        if len(filtered) <= limit:222            return ListGrantsResponse(Grants=filtered, Truncated=False)223        markers = region_details.markers224        in_limit = filtered[:limit]225        out_limit = filtered[limit:]226        marker_id = long_uid()227        markers[marker_id] = out_limit228        return ListGrantsResponse(Grants=in_limit, Truncated=True, NextMarker=marker_id)229    def get_public_key(230        self, context: RequestContext, key_id: KeyIdType, grant_tokens: GrantTokenList = None231    ) -> GetPublicKeyResponse:232        region_details = KMSBackend.get()233        result = region_details.key_pairs.get(key_id)234        if not result:235            raise NotFoundException()236        attrs = [237            "KeyId",238            "PublicKey",239            "KeySpec",240            "KeyUsage",241            "EncryptionAlgorithms",242            "SigningAlgorithms",243        ]244        result = select_attributes(result, attrs)245        return GetPublicKeyResponse(**result)246    @handler("GenerateDataKeyPair", expand=False)247    def generate_data_key_pair(248        self,249        context: RequestContext,250        generate_data_key_pair_request: GenerateDataKeyPairRequest,251    ) -> GenerateDataKeyPairResponse:252        result = _generate_data_key_pair(generate_data_key_pair_request)253        attrs = [254            "PrivateKeyCiphertextBlob",255            "PrivateKeyPlaintext",256            "PublicKey",257            "KeyId",258            "KeyPairSpec",259        ]260        result = select_attributes(result, attrs)261        return GenerateDataKeyPairResponse(**result)262    @handler("GenerateDataKeyPairWithoutPlaintext", expand=False)263    def generate_data_key_pair_without_plaintext(264        self,265        context: RequestContext,266        generate_data_key_pair_without_plaintext_request: GenerateDataKeyPairWithoutPlaintextRequest,267    ) -> GenerateDataKeyPairWithoutPlaintextResponse:268        result = _generate_data_key_pair(generate_data_key_pair_without_plaintext_request)269        result = select_attributes(270            result, ["PrivateKeyCiphertextBlob", "PublicKey", "KeyId", "KeyPairSpec"]271        )272        return GenerateDataKeyPairResponse(**result)273    def sign(274        self,275        context: RequestContext,276        key_id: KeyIdType,277        message: PlaintextType,278        signing_algorithm: SigningAlgorithmSpec,279        message_type: MessageType = None,280        grant_tokens: GrantTokenList = None,281    ) -> SignResponse:282        region_details = KMSBackend.get()283        key_pair = region_details.key_pairs.get(key_id)284        if not key_pair:285            raise NotFoundException(f"Key ID {key_id} not found for signing")286        kwargs = {}287        if signing_algorithm.startswith("RSA"):288            if "PKCS" in signing_algorithm:289                kwargs["padding"] = padding.PKCS1v15()290            elif "PSS" in signing_algorithm:291                kwargs["padding"] = padding.PSS(292                    mgf=padding.MGF1(hashes.SHA256()), salt_length=padding.PSS.MAX_LENGTH293                )294            else:295                LOG.warning("Unsupported padding in SigningAlgorithm '%s'", signing_algorithm)296        if "SHA_256" in signing_algorithm:297            kwargs["algorithm"] = hashes.SHA256()298        elif "SHA_384" in signing_algorithm:299            kwargs["algorithm"] = hashes.SHA384()300        elif "SHA_512" in signing_algorithm:301            kwargs["algorithm"] = hashes.SHA512()302        else:303            LOG.warning("Unsupported hash type in SigningAlgorithm '%s'", signing_algorithm)304        if signing_algorithm.startswith("ECDSA"):305            kwargs["signature_algorithm"] = ec.ECDSA(algorithm=kwargs.pop("algorithm", None))306        # generate signature307        signature = key_pair["_key_"].sign(data=message, **kwargs)308        result = {309            "KeyId": key_id,310            "Signature": signature,311            "SigningAlgorithm": signing_algorithm,312        }313        return SignResponse(**result)314    def encrypt(315        self,316        context: RequestContext,317        key_id: KeyIdType,318        plaintext: PlaintextType,319        encryption_context: EncryptionContextType = None,320        grant_tokens: GrantTokenList = None,321        encryption_algorithm: EncryptionAlgorithmSpec = None,322    ) -> EncryptResponse:323        # check if we have imported custom key material for this key324        matching = [key for key in KMSBackend.get().imports.values() if key.key_id == key_id]325        if not matching:326            return call_moto(context)327        key_obj = kms_backends[context.region].keys.get(key_id)328        ciphertext_blob = encrypt(key_obj.key_material, plaintext)329        return EncryptResponse(330            CiphertextBlob=ciphertext_blob, KeyId=key_id, EncryptionAlgorithm=encryption_algorithm331        )332    def decrypt(333        self,334        context: RequestContext,335        ciphertext_blob: CiphertextType,336        encryption_context: EncryptionContextType = None,337        grant_tokens: GrantTokenList = None,338        key_id: KeyIdType = None,339        encryption_algorithm: EncryptionAlgorithmSpec = None,340    ) -> DecryptResponse:341        # check if we have imported custom key material for this key342        matching = [key for key in KMSBackend.get().imports.values() if key.key_id == key_id]343        if not matching:344            return call_moto(context)345        key_obj = kms_backends[context.region].keys.get(key_id)346        plaintext = decrypt(key_obj.key_material, ciphertext_blob)347        return DecryptResponse(348            KeyId=key_id, Plaintext=plaintext, EncryptionAlgorithm=encryption_algorithm349        )350    def get_parameters_for_import(351        self,352        context: RequestContext,353        key_id: KeyIdType,354        wrapping_algorithm: AlgorithmSpec,355        wrapping_key_spec: WrappingKeySpec,356    ) -> GetParametersForImportResponse:357        key = _generate_data_key_pair(358            {"KeySpec": wrapping_key_spec}, create_cipher=False, add_to_keys=False359        )360        import_token = short_uid()361        import_state = KeyImportState(362            key_id=key_id,363            import_token=import_token,364            private_key=key["PrivateKeyPlaintext"],365            public_key=key["PublicKey"],366            wrapping_algo=wrapping_algorithm,367            key_obj=key["_key_"],368        )369        KMSBackend.get().imports[import_token] = import_state370        expiry_date = datetime.datetime.now() + datetime.timedelta(days=100)371        return GetParametersForImportResponse(372            KeyId=key_id,373            ImportToken=to_bytes(import_state.import_token),374            PublicKey=import_state.public_key,375            ParametersValidTo=expiry_date,376        )377    def import_key_material(378        self,379        context: RequestContext,380        key_id: KeyIdType,381        import_token: CiphertextType,382        encrypted_key_material: CiphertextType,383        valid_to: DateType = None,384        expiration_model: ExpirationModelType = None,385    ) -> ImportKeyMaterialResponse:386        import_token = to_str(import_token)387        import_state = KMSBackend.get().imports.get(import_token)388        if not import_state:389            raise NotFoundException(f"Unable to find key import token '{import_token}'")390        key_obj = kms_backends[context.region].keys.get(key_id)391        if not key_obj:392            raise NotFoundException(f"Unable to find key '{key_id}'")393        key_material = import_state.key_obj.decrypt(encrypted_key_material, padding.PKCS1v15())394        key_obj.key_material = key_material395        return ImportKeyMaterialResponse()396    def _verify_key_exists(self, key_id):397        try:398            kms_backends[aws_stack.get_region()].describe_key(key_id)399        except Exception:400            raise ValidationError(f"Invalid key ID '{key_id}'")401    def _validate_grant(self, data: Dict):402        if KEY_ID not in data or GRANTEE_PRINCIPAL not in data or OPERATIONS not in data:403            raise ValidationError("Grant ID, key ID and grantee principal must be specified")404        for operation in data[OPERATIONS]:405            if operation not in VALID_OPERATIONS:406                raise ValidationError(407                    f"Value {[OPERATIONS]} at 'operations' failed to satisfy constraint: Member must satisfy"408                    f" constraint: [Member must satisfy enum value set: {VALID_OPERATIONS}]"409                )410        self._verify_key_exists(data[KEY_ID])411# ---------------412# UTIL FUNCTIONS413# ---------------414def _generate_data_key_pair(data, create_cipher=True, add_to_keys=True):415    region_details = KMSBackend.get()...
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