botocore/crt/auth.py [14:64]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    REQUIRES_REGION = True
    _PRESIGNED_HEADERS_BLOCKLIST = [
        'Authorization',
        'X-Amz-Date',
        'X-Amz-Content-SHA256',
        'X-Amz-Security-Token',
    ]
    _SIGNATURE_TYPE = awscrt.auth.AwsSignatureType.HTTP_REQUEST_HEADERS
    _USE_DOUBLE_URI_ENCODE = True
    _SHOULD_NORMALIZE_URI_PATH = True

    def __init__(self, credentials, service_name, region_name):
        self.credentials = credentials
        self._service_name = service_name
        self._region_name = region_name
        self._expiration_in_seconds = None

    def add_auth(self, request):
        if self.credentials is None:
            raise NoCredentialsError()

        # Use utcnow() because that's what gets mocked by tests, but set
        # timezone because CRT assumes naive datetime is local time.
        datetime_now = datetime.datetime.utcnow().replace(
            tzinfo=datetime.timezone.utc)

        # Use existing 'X-Amz-Content-SHA256' header if able
        existing_sha256 = self._get_existing_sha256(request)

        self._modify_request_before_signing(request)

        credentials_provider = awscrt.auth.AwsCredentialsProvider.new_static(
            access_key_id=self.credentials.access_key,
            secret_access_key=self.credentials.secret_key,
            session_token=self.credentials.token)

        if self._should_sha256_sign_payload(request):
            if existing_sha256:
                explicit_payload = existing_sha256
            else:
                explicit_payload = None  # to be calculated during signing
        else:
            explicit_payload = UNSIGNED_PAYLOAD

        if self._should_add_content_sha256_header(explicit_payload):
            body_header = \
                awscrt.auth.AwsSignedBodyHeaderType.X_AMZ_CONTENT_SHA_256
        else:
            body_header = awscrt.auth.AwsSignedBodyHeaderType.NONE

        signing_config = awscrt.auth.AwsSigningConfig(
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



botocore/crt/auth.py [197:247]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    REQUIRES_REGION = True
    _PRESIGNED_HEADERS_BLOCKLIST = [
        'Authorization',
        'X-Amz-Date',
        'X-Amz-Content-SHA256',
        'X-Amz-Security-Token',
    ]
    _SIGNATURE_TYPE = awscrt.auth.AwsSignatureType.HTTP_REQUEST_HEADERS
    _USE_DOUBLE_URI_ENCODE = True
    _SHOULD_NORMALIZE_URI_PATH = True

    def __init__(self, credentials, service_name, region_name):
        self.credentials = credentials
        self._service_name = service_name
        self._region_name = region_name
        self._expiration_in_seconds = None

    def add_auth(self, request):
        if self.credentials is None:
            raise NoCredentialsError()

        # Use utcnow() because that's what gets mocked by tests, but set
        # timezone because CRT assumes naive datetime is local time.
        datetime_now = datetime.datetime.utcnow().replace(
            tzinfo=datetime.timezone.utc)

        # Use existing 'X-Amz-Content-SHA256' header if able
        existing_sha256 = self._get_existing_sha256(request)

        self._modify_request_before_signing(request)

        credentials_provider = awscrt.auth.AwsCredentialsProvider.new_static(
            access_key_id=self.credentials.access_key,
            secret_access_key=self.credentials.secret_key,
            session_token=self.credentials.token)

        if self._should_sha256_sign_payload(request):
            if existing_sha256:
                explicit_payload = existing_sha256
            else:
                explicit_payload = None  # to be calculated during signing
        else:
            explicit_payload = UNSIGNED_PAYLOAD

        if self._should_add_content_sha256_header(explicit_payload):
            body_header = \
                awscrt.auth.AwsSignedBodyHeaderType.X_AMZ_CONTENT_SHA_256
        else:
            body_header = awscrt.auth.AwsSignedBodyHeaderType.NONE

        signing_config = awscrt.auth.AwsSigningConfig(
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -