two version of R2R are here HEAD master

1 files changed, 856 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/botocore/regions.py b/.venv/lib/python3.12/site-packages/botocore/regions.py
new file mode 100644
index 00000000..4d0fc8ba
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+++ b/.venv/lib/python3.12/site-packages/botocore/regions.py
@@ -0,0 +1,856 @@
+# Copyright 2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"). You
+# may not use this file except in compliance with the License. A copy of
+# the License is located at
+#
+# http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+# ANY KIND, either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.
+"""Resolves regions and endpoints.
+
+This module implements endpoint resolution, including resolving endpoints for a
+given service and region and resolving the available endpoints for a service
+in a specific AWS partition.
+"""
+
+import copy
+import logging
+import re
+from enum import Enum
+
+import jmespath
+
+from botocore import UNSIGNED, xform_name
+from botocore.auth import AUTH_TYPE_MAPS, HAS_CRT
+from botocore.crt import CRT_SUPPORTED_AUTH_TYPES
+from botocore.endpoint_provider import EndpointProvider
+from botocore.exceptions import (
+    EndpointProviderError,
+    EndpointVariantError,
+    InvalidEndpointConfigurationError,
+    InvalidHostLabelError,
+    MissingDependencyException,
+    NoRegionError,
+    ParamValidationError,
+    UnknownEndpointResolutionBuiltInName,
+    UnknownRegionError,
+    UnknownSignatureVersionError,
+    UnsupportedS3AccesspointConfigurationError,
+    UnsupportedS3ConfigurationError,
+    UnsupportedS3ControlArnError,
+    UnsupportedS3ControlConfigurationError,
+)
+from botocore.utils import ensure_boolean, instance_cache
+
+LOG = logging.getLogger(__name__)
+DEFAULT_URI_TEMPLATE = '{service}.{region}.{dnsSuffix}'  # noqa
+DEFAULT_SERVICE_DATA = {'endpoints': {}}
+
+
+class BaseEndpointResolver:
+    """Resolves regions and endpoints. Must be subclassed."""
+
+    def construct_endpoint(self, service_name, region_name=None):
+        """Resolves an endpoint for a service and region combination.
+
+        :type service_name: string
+        :param service_name: Name of the service to resolve an endpoint for
+            (e.g., s3)
+
+        :type region_name: string
+        :param region_name: Region/endpoint name to resolve (e.g., us-east-1)
+            if no region is provided, the first found partition-wide endpoint
+            will be used if available.
+
+        :rtype: dict
+        :return: Returns a dict containing the following keys:
+            - partition: (string, required) Resolved partition name
+            - endpointName: (string, required) Resolved endpoint name
+            - hostname: (string, required) Hostname to use for this endpoint
+            - sslCommonName: (string) sslCommonName to use for this endpoint.
+            - credentialScope: (dict) Signature version 4 credential scope
+              - region: (string) region name override when signing.
+              - service: (string) service name override when signing.
+            - signatureVersions: (list<string>) A list of possible signature
+              versions, including s3, v4, v2, and s3v4
+            - protocols: (list<string>) A list of supported protocols
+              (e.g., http, https)
+            - ...: Other keys may be included as well based on the metadata
+        """
+        raise NotImplementedError
+
+    def get_available_partitions(self):
+        """Lists the partitions available to the endpoint resolver.
+
+        :return: Returns a list of partition names (e.g., ["aws", "aws-cn"]).
+        """
+        raise NotImplementedError
+
+    def get_available_endpoints(
+        self, service_name, partition_name='aws', allow_non_regional=False
+    ):
+        """Lists the endpoint names of a particular partition.
+
+        :type service_name: string
+        :param service_name: Name of a service to list endpoint for (e.g., s3)
+
+        :type partition_name: string
+        :param partition_name: Name of the partition to limit endpoints to.
+            (e.g., aws for the public AWS endpoints, aws-cn for AWS China
+            endpoints, aws-us-gov for AWS GovCloud (US) Endpoints, etc.
+
+        :type allow_non_regional: bool
+        :param allow_non_regional: Set to True to include endpoints that are
+             not regional endpoints (e.g., s3-external-1,
+             fips-us-gov-west-1, etc).
+        :return: Returns a list of endpoint names (e.g., ["us-east-1"]).
+        """
+        raise NotImplementedError
+
+
+class EndpointResolver(BaseEndpointResolver):
+    """Resolves endpoints based on partition endpoint metadata"""
+
+    _UNSUPPORTED_DUALSTACK_PARTITIONS = ['aws-iso', 'aws-iso-b']
+
+    def __init__(self, endpoint_data, uses_builtin_data=False):
+        """
+        :type endpoint_data: dict
+        :param endpoint_data: A dict of partition data.
+
+        :type uses_builtin_data: boolean
+        :param uses_builtin_data: Whether the endpoint data originates in the
+            package's data directory.
+        """
+        if 'partitions' not in endpoint_data:
+            raise ValueError('Missing "partitions" in endpoint data')
+        self._endpoint_data = endpoint_data
+        self.uses_builtin_data = uses_builtin_data
+
+    def get_service_endpoints_data(self, service_name, partition_name='aws'):
+        for partition in self._endpoint_data['partitions']:
+            if partition['partition'] != partition_name:
+                continue
+            services = partition['services']
+            if service_name not in services:
+                continue
+            return services[service_name]['endpoints']
+
+    def get_available_partitions(self):
+        result = []
+        for partition in self._endpoint_data['partitions']:
+            result.append(partition['partition'])
+        return result
+
+    def get_available_endpoints(
+        self,
+        service_name,
+        partition_name='aws',
+        allow_non_regional=False,
+        endpoint_variant_tags=None,
+    ):
+        result = []
+        for partition in self._endpoint_data['partitions']:
+            if partition['partition'] != partition_name:
+                continue
+            services = partition['services']
+            if service_name not in services:
+                continue
+            service_endpoints = services[service_name]['endpoints']
+            for endpoint_name in service_endpoints:
+                is_regional_endpoint = endpoint_name in partition['regions']
+                # Only regional endpoints can be modeled with variants
+                if endpoint_variant_tags and is_regional_endpoint:
+                    variant_data = self._retrieve_variant_data(
+                        service_endpoints[endpoint_name], endpoint_variant_tags
+                    )
+                    if variant_data:
+                        result.append(endpoint_name)
+                elif allow_non_regional or is_regional_endpoint:
+                    result.append(endpoint_name)
+        return result
+
+    def get_partition_dns_suffix(
+        self, partition_name, endpoint_variant_tags=None
+    ):
+        for partition in self._endpoint_data['partitions']:
+            if partition['partition'] == partition_name:
+                if endpoint_variant_tags:
+                    variant = self._retrieve_variant_data(
+                        partition.get('defaults'), endpoint_variant_tags
+                    )
+                    if variant and 'dnsSuffix' in variant:
+                        return variant['dnsSuffix']
+                else:
+                    return partition['dnsSuffix']
+        return None
+
+    def construct_endpoint(
+        self,
+        service_name,
+        region_name=None,
+        partition_name=None,
+        use_dualstack_endpoint=False,
+        use_fips_endpoint=False,
+    ):
+        if (
+            service_name == 's3'
+            and use_dualstack_endpoint
+            and region_name is None
+        ):
+            region_name = 'us-east-1'
+
+        if partition_name is not None:
+            valid_partition = None
+            for partition in self._endpoint_data['partitions']:
+                if partition['partition'] == partition_name:
+                    valid_partition = partition
+
+            if valid_partition is not None:
+                result = self._endpoint_for_partition(
+                    valid_partition,
+                    service_name,
+                    region_name,
+                    use_dualstack_endpoint,
+                    use_fips_endpoint,
+                    True,
+                )
+                return result
+            return None
+
+        # Iterate over each partition until a match is found.
+        for partition in self._endpoint_data['partitions']:
+            if use_dualstack_endpoint and (
+                partition['partition']
+                in self._UNSUPPORTED_DUALSTACK_PARTITIONS
+            ):
+                continue
+            result = self._endpoint_for_partition(
+                partition,
+                service_name,
+                region_name,
+                use_dualstack_endpoint,
+                use_fips_endpoint,
+            )
+            if result:
+                return result
+
+    def get_partition_for_region(self, region_name):
+        for partition in self._endpoint_data['partitions']:
+            if self._region_match(partition, region_name):
+                return partition['partition']
+        raise UnknownRegionError(
+            region_name=region_name,
+            error_msg='No partition found for provided region_name.',
+        )
+
+    def _endpoint_for_partition(
+        self,
+        partition,
+        service_name,
+        region_name,
+        use_dualstack_endpoint,
+        use_fips_endpoint,
+        force_partition=False,
+    ):
+        partition_name = partition["partition"]
+        if (
+            use_dualstack_endpoint
+            and partition_name in self._UNSUPPORTED_DUALSTACK_PARTITIONS
+        ):
+            error_msg = (
+                "Dualstack endpoints are currently not supported"
+                f" for {partition_name} partition"
+            )
+            raise EndpointVariantError(tags=['dualstack'], error_msg=error_msg)
+
+        # Get the service from the partition, or an empty template.
+        service_data = partition['services'].get(
+            service_name, DEFAULT_SERVICE_DATA
+        )
+        # Use the partition endpoint if no region is supplied.
+        if region_name is None:
+            if 'partitionEndpoint' in service_data:
+                region_name = service_data['partitionEndpoint']
+            else:
+                raise NoRegionError()
+
+        resolve_kwargs = {
+            'partition': partition,
+            'service_name': service_name,
+            'service_data': service_data,
+            'endpoint_name': region_name,
+            'use_dualstack_endpoint': use_dualstack_endpoint,
+            'use_fips_endpoint': use_fips_endpoint,
+        }
+
+        # Attempt to resolve the exact region for this partition.
+        if region_name in service_data['endpoints']:
+            return self._resolve(**resolve_kwargs)
+
+        # Check to see if the endpoint provided is valid for the partition.
+        if self._region_match(partition, region_name) or force_partition:
+            # Use the partition endpoint if set and not regionalized.
+            partition_endpoint = service_data.get('partitionEndpoint')
+            is_regionalized = service_data.get('isRegionalized', True)
+            if partition_endpoint and not is_regionalized:
+                LOG.debug(
+                    'Using partition endpoint for %s, %s: %s',
+                    service_name,
+                    region_name,
+                    partition_endpoint,
+                )
+                resolve_kwargs['endpoint_name'] = partition_endpoint
+                return self._resolve(**resolve_kwargs)
+            LOG.debug(
+                'Creating a regex based endpoint for %s, %s',
+                service_name,
+                region_name,
+            )
+            return self._resolve(**resolve_kwargs)
+
+    def _region_match(self, partition, region_name):
+        if region_name in partition['regions']:
+            return True
+        if 'regionRegex' in partition:
+            return re.compile(partition['regionRegex']).match(region_name)
+        return False
+
+    def _retrieve_variant_data(self, endpoint_data, tags):
+        variants = endpoint_data.get('variants', [])
+        for variant in variants:
+            if set(variant['tags']) == set(tags):
+                result = variant.copy()
+                return result
+
+    def _create_tag_list(self, use_dualstack_endpoint, use_fips_endpoint):
+        tags = []
+        if use_dualstack_endpoint:
+            tags.append('dualstack')
+        if use_fips_endpoint:
+            tags.append('fips')
+        return tags
+
+    def _resolve_variant(
+        self, tags, endpoint_data, service_defaults, partition_defaults
+    ):
+        result = {}
+        for variants in [endpoint_data, service_defaults, partition_defaults]:
+            variant = self._retrieve_variant_data(variants, tags)
+            if variant:
+                self._merge_keys(variant, result)
+        return result
+
+    def _resolve(
+        self,
+        partition,
+        service_name,
+        service_data,
+        endpoint_name,
+        use_dualstack_endpoint,
+        use_fips_endpoint,
+    ):
+        endpoint_data = service_data.get('endpoints', {}).get(
+            endpoint_name, {}
+        )
+
+        if endpoint_data.get('deprecated'):
+            LOG.warning(
+                f'Client is configured with the deprecated endpoint: {endpoint_name}'
+            )
+
+        service_defaults = service_data.get('defaults', {})
+        partition_defaults = partition.get('defaults', {})
+        tags = self._create_tag_list(use_dualstack_endpoint, use_fips_endpoint)
+
+        if tags:
+            result = self._resolve_variant(
+                tags, endpoint_data, service_defaults, partition_defaults
+            )
+            if result == {}:
+                error_msg = (
+                    f"Endpoint does not exist for {service_name} "
+                    f"in region {endpoint_name}"
+                )
+                raise EndpointVariantError(tags=tags, error_msg=error_msg)
+            self._merge_keys(endpoint_data, result)
+        else:
+            result = endpoint_data
+
+        # If dnsSuffix has not already been consumed from a variant definition
+        if 'dnsSuffix' not in result:
+            result['dnsSuffix'] = partition['dnsSuffix']
+
+        result['partition'] = partition['partition']
+        result['endpointName'] = endpoint_name
+
+        # Merge in the service defaults then the partition defaults.
+        self._merge_keys(service_defaults, result)
+        self._merge_keys(partition_defaults, result)
+
+        result['hostname'] = self._expand_template(
+            partition,
+            result['hostname'],
+            service_name,
+            endpoint_name,
+            result['dnsSuffix'],
+        )
+        if 'sslCommonName' in result:
+            result['sslCommonName'] = self._expand_template(
+                partition,
+                result['sslCommonName'],
+                service_name,
+                endpoint_name,
+                result['dnsSuffix'],
+            )
+
+        return result
+
+    def _merge_keys(self, from_data, result):
+        for key in from_data:
+            if key not in result:
+                result[key] = from_data[key]
+
+    def _expand_template(
+        self, partition, template, service_name, endpoint_name, dnsSuffix
+    ):
+        return template.format(
+            service=service_name, region=endpoint_name, dnsSuffix=dnsSuffix
+        )
+
+
+class EndpointResolverBuiltins(str, Enum):
+    # The AWS Region configured for the SDK client (str)
+    AWS_REGION = "AWS::Region"
+    # Whether the UseFIPSEndpoint configuration option has been enabled for
+    # the SDK client (bool)
+    AWS_USE_FIPS = "AWS::UseFIPS"
+    # Whether the UseDualStackEndpoint configuration option has been enabled
+    # for the SDK client (bool)
+    AWS_USE_DUALSTACK = "AWS::UseDualStack"
+    # Whether the global endpoint should be used with STS, rather than the
+    # regional endpoint for us-east-1 (bool)
+    AWS_STS_USE_GLOBAL_ENDPOINT = "AWS::STS::UseGlobalEndpoint"
+    # Whether the global endpoint should be used with S3, rather than the
+    # regional endpoint for us-east-1 (bool)
+    AWS_S3_USE_GLOBAL_ENDPOINT = "AWS::S3::UseGlobalEndpoint"
+    # Whether S3 Transfer Acceleration has been requested (bool)
+    AWS_S3_ACCELERATE = "AWS::S3::Accelerate"
+    # Whether S3 Force Path Style has been enabled (bool)
+    AWS_S3_FORCE_PATH_STYLE = "AWS::S3::ForcePathStyle"
+    # Whether to use the ARN region or raise an error when ARN and client
+    # region differ (for s3 service only, bool)
+    AWS_S3_USE_ARN_REGION = "AWS::S3::UseArnRegion"
+    # Whether to use the ARN region or raise an error when ARN and client
+    # region differ (for s3-control service only, bool)
+    AWS_S3CONTROL_USE_ARN_REGION = 'AWS::S3Control::UseArnRegion'
+    # Whether multi-region access points (MRAP) should be disabled (bool)
+    AWS_S3_DISABLE_MRAP = "AWS::S3::DisableMultiRegionAccessPoints"
+    # Whether a custom endpoint has been configured (str)
+    SDK_ENDPOINT = "SDK::Endpoint"
+    # An AWS account ID that can be optionally configured for the SDK client (str)
+    ACCOUNT_ID = "AWS::Auth::AccountId"
+    # Whether an endpoint should include an account ID (str)
+    ACCOUNT_ID_ENDPOINT_MODE = "AWS::Auth::AccountIdEndpointMode"
+
+
+class EndpointRulesetResolver:
+    """Resolves endpoints using a service's endpoint ruleset"""
+
+    def __init__(
+        self,
+        endpoint_ruleset_data,
+        partition_data,
+        service_model,
+        builtins,
+        client_context,
+        event_emitter,
+        use_ssl=True,
+        requested_auth_scheme=None,
+    ):
+        self._provider = EndpointProvider(
+            ruleset_data=endpoint_ruleset_data,
+            partition_data=partition_data,
+        )
+        self._param_definitions = self._provider.ruleset.parameters
+        self._service_model = service_model
+        self._builtins = builtins
+        self._client_context = client_context
+        self._event_emitter = event_emitter
+        self._use_ssl = use_ssl
+        self._requested_auth_scheme = requested_auth_scheme
+        self._instance_cache = {}
+
+    def construct_endpoint(
+        self,
+        operation_model,
+        call_args,
+        request_context,
+    ):
+        """Invokes the provider with params defined in the service's ruleset"""
+        if call_args is None:
+            call_args = {}
+
+        if request_context is None:
+            request_context = {}
+
+        provider_params = self._get_provider_params(
+            operation_model, call_args, request_context
+        )
+        LOG.debug(
+            f'Calling endpoint provider with parameters: {provider_params}'
+        )
+        try:
+            provider_result = self._provider.resolve_endpoint(
+                **provider_params
+            )
+        except EndpointProviderError as ex:
+            botocore_exception = self.ruleset_error_to_botocore_exception(
+                ex, provider_params
+            )
+            if botocore_exception is None:
+                raise
+            else:
+                raise botocore_exception from ex
+        LOG.debug(f'Endpoint provider result: {provider_result.url}')
+
+        # The endpoint provider does not support non-secure transport.
+        if not self._use_ssl and provider_result.url.startswith('https://'):
+            provider_result = provider_result._replace(
+                url=f'http://{provider_result.url[8:]}'
+            )
+
+        # Multi-valued headers are not supported in botocore. Replace the list
+        # of values returned for each header with just its first entry,
+        # dropping any additionally entries.
+        provider_result = provider_result._replace(
+            headers={
+                key: val[0] for key, val in provider_result.headers.items()
+            }
+        )
+
+        return provider_result
+
+    def _get_provider_params(
+        self, operation_model, call_args, request_context
+    ):
+        """Resolve a value for each parameter defined in the service's ruleset
+
+        The resolution order for parameter values is:
+        1. Operation-specific static context values from the service definition
+        2. Operation-specific dynamic context values from API parameters
+        3. Client-specific context parameters
+        4. Built-in values such as region, FIPS usage, ...
+        """
+        provider_params = {}
+        # Builtin values can be customized for each operation by hooks
+        # subscribing to the ``before-endpoint-resolution.*`` event.
+        customized_builtins = self._get_customized_builtins(
+            operation_model, call_args, request_context
+        )
+        for param_name, param_def in self._param_definitions.items():
+            param_val = self._resolve_param_from_context(
+                param_name=param_name,
+                operation_model=operation_model,
+                call_args=call_args,
+            )
+            if param_val is None and param_def.builtin is not None:
+                param_val = self._resolve_param_as_builtin(
+                    builtin_name=param_def.builtin,
+                    builtins=customized_builtins,
+                )
+            if param_val is not None:
+                provider_params[param_name] = param_val
+
+        return provider_params
+
+    def _resolve_param_from_context(
+        self, param_name, operation_model, call_args
+    ):
+        static = self._resolve_param_as_static_context_param(
+            param_name, operation_model
+        )
+        if static is not None:
+            return static
+        dynamic = self._resolve_param_as_dynamic_context_param(
+            param_name, operation_model, call_args
+        )
+        if dynamic is not None:
+            return dynamic
+        operation_context_params = (
+            self._resolve_param_as_operation_context_param(
+                param_name, operation_model, call_args
+            )
+        )
+        if operation_context_params is not None:
+            return operation_context_params
+        return self._resolve_param_as_client_context_param(param_name)
+
+    def _resolve_param_as_static_context_param(
+        self, param_name, operation_model
+    ):
+        static_ctx_params = self._get_static_context_params(operation_model)
+        return static_ctx_params.get(param_name)
+
+    def _resolve_param_as_dynamic_context_param(
+        self, param_name, operation_model, call_args
+    ):
+        dynamic_ctx_params = self._get_dynamic_context_params(operation_model)
+        if param_name in dynamic_ctx_params:
+            member_name = dynamic_ctx_params[param_name]
+            return call_args.get(member_name)
+
+    def _resolve_param_as_client_context_param(self, param_name):
+        client_ctx_params = self._get_client_context_params()
+        if param_name in client_ctx_params:
+            client_ctx_varname = client_ctx_params[param_name]
+            return self._client_context.get(client_ctx_varname)
+
+    def _resolve_param_as_operation_context_param(
+        self, param_name, operation_model, call_args
+    ):
+        operation_ctx_params = operation_model.operation_context_parameters
+        if param_name in operation_ctx_params:
+            path = operation_ctx_params[param_name]['path']
+            return jmespath.search(path, call_args)
+
+    def _resolve_param_as_builtin(self, builtin_name, builtins):
+        if builtin_name not in EndpointResolverBuiltins.__members__.values():
+            raise UnknownEndpointResolutionBuiltInName(name=builtin_name)
+        builtin = builtins.get(builtin_name)
+        if callable(builtin):
+            return builtin()
+        return builtin
+
+    @instance_cache
+    def _get_static_context_params(self, operation_model):
+        """Mapping of param names to static param value for an operation"""
+        return {
+            param.name: param.value
+            for param in operation_model.static_context_parameters
+        }
+
+    @instance_cache
+    def _get_dynamic_context_params(self, operation_model):
+        """Mapping of param names to member names for an operation"""
+        return {
+            param.name: param.member_name
+            for param in operation_model.context_parameters
+        }
+
+    @instance_cache
+    def _get_client_context_params(self):
+        """Mapping of param names to client configuration variable"""
+        return {
+            param.name: xform_name(param.name)
+            for param in self._service_model.client_context_parameters
+        }
+
+    def _get_customized_builtins(
+        self, operation_model, call_args, request_context
+    ):
+        service_id = self._service_model.service_id.hyphenize()
+        customized_builtins = copy.copy(self._builtins)
+        # Handlers are expected to modify the builtins dict in place.
+        self._event_emitter.emit(
+            f'before-endpoint-resolution.{service_id}',
+            builtins=customized_builtins,
+            model=operation_model,
+            params=call_args,
+            context=request_context,
+        )
+        return customized_builtins
+
+    def auth_schemes_to_signing_ctx(self, auth_schemes):
+        """Convert an Endpoint's authSchemes property to a signing_context dict
+
+        :type auth_schemes: list
+        :param auth_schemes: A list of dictionaries taken from the
+            ``authSchemes`` property of an Endpoint object returned by
+            ``EndpointProvider``.
+
+        :rtype: str, dict
+        :return: Tuple of auth type string (to be used in
+            ``request_context['auth_type']``) and signing context dict (for use
+            in ``request_context['signing']``).
+        """
+        if not isinstance(auth_schemes, list) or len(auth_schemes) == 0:
+            raise TypeError("auth_schemes must be a non-empty list.")
+
+        LOG.debug(
+            'Selecting from endpoint provider\'s list of auth schemes: %s. '
+            'User selected auth scheme is: "%s"',
+            ', '.join([f'"{s.get("name")}"' for s in auth_schemes]),
+            self._requested_auth_scheme,
+        )
+
+        if self._requested_auth_scheme == UNSIGNED:
+            return 'none', {}
+
+        auth_schemes = [
+            {**scheme, 'name': self._strip_sig_prefix(scheme['name'])}
+            for scheme in auth_schemes
+        ]
+        if self._requested_auth_scheme is not None:
+            try:
+                # Use the first scheme that matches the requested scheme,
+                # after accounting for naming differences between botocore and
+                # endpoint rulesets. Keep the requested name.
+                name, scheme = next(
+                    (self._requested_auth_scheme, s)
+                    for s in auth_schemes
+                    if self._does_botocore_authname_match_ruleset_authname(
+                        self._requested_auth_scheme, s['name']
+                    )
+                )
+            except StopIteration:
+                # For legacy signers, no match will be found. Do not raise an
+                # exception, instead default to the logic in botocore
+                # customizations.
+                return None, {}
+        else:
+            try:
+                name, scheme = next(
+                    (s['name'], s)
+                    for s in auth_schemes
+                    if s['name'] in AUTH_TYPE_MAPS
+                )
+            except StopIteration:
+                # If no auth scheme was specifically requested and an
+                # authSchemes list is present in the Endpoint object but none
+                # of the entries are supported, raise an exception.
+                fixable_with_crt = False
+                auth_type_options = [s['name'] for s in auth_schemes]
+                if not HAS_CRT:
+                    fixable_with_crt = any(
+                        scheme in CRT_SUPPORTED_AUTH_TYPES
+                        for scheme in auth_type_options
+                    )
+
+                if fixable_with_crt:
+                    raise MissingDependencyException(
+                        msg='This operation requires an additional dependency.'
+                        ' Use pip install botocore[crt] before proceeding.'
+                    )
+                else:
+                    raise UnknownSignatureVersionError(
+                        signature_version=', '.join(auth_type_options)
+                    )
+
+        signing_context = {}
+        if 'signingRegion' in scheme:
+            signing_context['region'] = scheme['signingRegion']
+        elif 'signingRegionSet' in scheme:
+            if len(scheme['signingRegionSet']) > 0:
+                signing_context['region'] = ','.join(
+                    scheme['signingRegionSet']
+                )
+        if 'signingName' in scheme:
+            signing_context.update(signing_name=scheme['signingName'])
+        if 'disableDoubleEncoding' in scheme:
+            signing_context['disableDoubleEncoding'] = ensure_boolean(
+                scheme['disableDoubleEncoding']
+            )
+
+        LOG.debug(
+            'Selected auth type "%s" as "%s" with signing context params: %s',
+            scheme['name'],  # original name without "sig"
+            name,  # chosen name can differ when `signature_version` is set
+            signing_context,
+        )
+        return name, signing_context
+
+    def _strip_sig_prefix(self, auth_name):
+        """Normalize auth type names by removing any "sig" prefix"""
+        return auth_name[3:] if auth_name.startswith('sig') else auth_name
+
+    def _does_botocore_authname_match_ruleset_authname(self, botoname, rsname):
+        """
+        Whether a valid string provided as signature_version parameter for
+        client construction refers to the same auth methods as a string
+        returned by the endpoint ruleset provider. This accounts for:
+
+        * The ruleset prefixes auth names with "sig"
+        * The s3 and s3control rulesets don't distinguish between v4[a] and
+          s3v4[a] signers
+        * The v2, v3, and HMAC v1 based signers (s3, s3-*) are botocore legacy
+          features and do not exist in the rulesets
+        * Only characters up to the first dash are considered
+
+        Example matches:
+        * v4, sigv4
+        * v4, v4
+        * s3v4, sigv4
+        * s3v7, sigv7 (hypothetical example)
+        * s3v4a, sigv4a
+        * s3v4-query, sigv4
+
+        Example mismatches:
+        * v4a, sigv4
+        * s3, sigv4
+        * s3-presign-post, sigv4
+        """
+        rsname = self._strip_sig_prefix(rsname)
+        botoname = botoname.split('-')[0]
+        if botoname != 's3' and botoname.startswith('s3'):
+            botoname = botoname[2:]
+        return rsname == botoname
+
+    def ruleset_error_to_botocore_exception(self, ruleset_exception, params):
+        """Attempts to translate ruleset errors to pre-existing botocore
+        exception types by string matching exception strings.
+        """
+        msg = ruleset_exception.kwargs.get('msg')
+        if msg is None:
+            return
+
+        if msg.startswith('Invalid region in ARN: '):
+            # Example message:
+            # "Invalid region in ARN: `us-we$t-2` (invalid DNS name)"
+            try:
+                label = msg.split('`')[1]
+            except IndexError:
+                label = msg
+            return InvalidHostLabelError(label=label)
+
+        service_name = self._service_model.service_name
+        if service_name == 's3':
+            if (
+                msg == 'S3 Object Lambda does not support S3 Accelerate'
+                or msg == 'Accelerate cannot be used with FIPS'
+            ):
+                return UnsupportedS3ConfigurationError(msg=msg)
+            if (
+                msg.startswith('S3 Outposts does not support')
+                or msg.startswith('S3 MRAP does not support')
+                or msg.startswith('S3 Object Lambda does not support')
+                or msg.startswith('Access Points do not support')
+                or msg.startswith('Invalid configuration:')
+                or msg.startswith('Client was configured for partition')
+            ):
+                return UnsupportedS3AccesspointConfigurationError(msg=msg)
+            if msg.lower().startswith('invalid arn:'):
+                return ParamValidationError(report=msg)
+        if service_name == 's3control':
+            if msg.startswith('Invalid ARN:'):
+                arn = params.get('Bucket')
+                return UnsupportedS3ControlArnError(arn=arn, msg=msg)
+            if msg.startswith('Invalid configuration:') or msg.startswith(
+                'Client was configured for partition'
+            ):
+                return UnsupportedS3ControlConfigurationError(msg=msg)
+            if msg == "AccountId is required but not set":
+                return ParamValidationError(report=msg)
+        if service_name == 'events':
+            if msg.startswith(
+                'Invalid Configuration: FIPS is not supported with '
+                'EventBridge multi-region endpoints.'
+            ):
+                return InvalidEndpointConfigurationError(msg=msg)
+            if msg == 'EndpointId must be a valid host label.':
+                return InvalidEndpointConfigurationError(msg=msg)
+        return None