// Code generated by smithy-go-codegen DO NOT EDIT.

package kms

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/service/kms/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Returns a unique symmetric data key for use outside of KMS. This operation
// returns a data key that is encrypted under a symmetric encryption KMS key that
// you specify. The bytes in the key are random; they are not related to the caller
// or to the KMS key.
//
// GenerateDataKeyWithoutPlaintext is identical to the GenerateDataKey operation except that it
// does not return a plaintext copy of the data key.
//
// This operation is useful for systems that need to encrypt data at some point,
// but not immediately. When you need to encrypt the data, you call the Decryptoperation
// on the encrypted copy of the key.
//
// It's also useful in distributed systems with different levels of trust. For
// example, you might store encrypted data in containers. One component of your
// system creates new containers and stores an encrypted data key with each
// container. Then, a different component puts the data into the containers. That
// component first decrypts the data key, uses the plaintext data key to encrypt
// data, puts the encrypted data into the container, and then destroys the
// plaintext data key. In this system, the component that creates the containers
// never sees the plaintext data key.
//
// To request an asymmetric data key pair, use the GenerateDataKeyPair or GenerateDataKeyPairWithoutPlaintext operations.
//
// To generate a data key, you must specify the symmetric encryption KMS key that
// is used to encrypt the data key. You cannot use an asymmetric KMS key or a key
// in a custom key store to generate a data key. To get the type of your KMS key,
// use the DescribeKeyoperation.
//
// You must also specify the length of the data key. Use either the KeySpec or
// NumberOfBytes parameters (but not both). For 128-bit and 256-bit data keys, use
// the KeySpec parameter.
//
// To generate an SM4 data key (China Regions only), specify a KeySpec value of
// AES_128 or NumberOfBytes value of 16 . The symmetric encryption key used in
// China Regions to encrypt your data key is an SM4 encryption key.
//
// If the operation succeeds, you will find the encrypted copy of the data key in
// the CiphertextBlob field.
//
// You can use an optional encryption context to add additional security to the
// encryption operation. If you specify an EncryptionContext , you must specify the
// same encryption context (a case-sensitive exact match) when decrypting the
// encrypted data key. Otherwise, the request to decrypt fails with an
// InvalidCiphertextException . For more information, see [Encryption Context] in the Key Management
// Service Developer Guide.
//
// The KMS key that you use for this operation must be in a compatible key state.
// For details, see [Key states of KMS keys]in the Key Management Service Developer Guide.
//
// Cross-account use: Yes. To perform this operation with a KMS key in a different
// Amazon Web Services account, specify the key ARN or alias ARN in the value of
// the KeyId parameter.
//
// Required permissions: [kms:GenerateDataKeyWithoutPlaintext] (key policy)
//
// Related operations:
//
// # Decrypt
//
// # Encrypt
//
// # GenerateDataKey
//
// # GenerateDataKeyPair
//
// # GenerateDataKeyPairWithoutPlaintext
//
// Eventual consistency: The KMS API follows an eventual consistency model. For
// more information, see [KMS eventual consistency].
//
// [Key states of KMS keys]: https://docs.aws.amazon.com/kms/latest/developerguide/key-state.html
// [Encryption Context]: https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#encrypt_context
// [kms:GenerateDataKeyWithoutPlaintext]: https://docs.aws.amazon.com/kms/latest/developerguide/kms-api-permissions-reference.html
// [KMS eventual consistency]: https://docs.aws.amazon.com/kms/latest/developerguide/programming-eventual-consistency.html
func (c *Client) GenerateDataKeyWithoutPlaintext(ctx context.Context, params *GenerateDataKeyWithoutPlaintextInput, optFns ...func(*Options)) (*GenerateDataKeyWithoutPlaintextOutput, error) {
	if params == nil {
		params = &GenerateDataKeyWithoutPlaintextInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "GenerateDataKeyWithoutPlaintext", params, optFns, c.addOperationGenerateDataKeyWithoutPlaintextMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*GenerateDataKeyWithoutPlaintextOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type GenerateDataKeyWithoutPlaintextInput struct {

	// Specifies the symmetric encryption KMS key that encrypts the data key. You
	// cannot specify an asymmetric KMS key or a KMS key in a custom key store. To get
	// the type and origin of your KMS key, use the DescribeKeyoperation.
	//
	// To specify a KMS key, use its key ID, key ARN, alias name, or alias ARN. When
	// using an alias name, prefix it with "alias/" . To specify a KMS key in a
	// different Amazon Web Services account, you must use the key ARN or alias ARN.
	//
	// For example:
	//
	//   - Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
	//
	//   - Key ARN:
	//   arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
	//
	//   - Alias name: alias/ExampleAlias
	//
	//   - Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias
	//
	// To get the key ID and key ARN for a KMS key, use ListKeys or DescribeKey. To get the alias name
	// and alias ARN, use ListAliases.
	//
	// This member is required.
	KeyId *string

	// Checks if your request will succeed. DryRun is an optional parameter.
	//
	// To learn more about how to use this parameter, see [Testing your KMS API calls] in the Key Management
	// Service Developer Guide.
	//
	// [Testing your KMS API calls]: https://docs.aws.amazon.com/kms/latest/developerguide/programming-dryrun.html
	DryRun *bool

	// Specifies the encryption context that will be used when encrypting the data key.
	//
	// Do not include confidential or sensitive information in this field. This field
	// may be displayed in plaintext in CloudTrail logs and other output.
	//
	// An encryption context is a collection of non-secret key-value pairs that
	// represent additional authenticated data. When you use an encryption context to
	// encrypt data, you must specify the same (an exact case-sensitive match)
	// encryption context to decrypt the data. An encryption context is supported only
	// on operations with symmetric encryption KMS keys. On operations with symmetric
	// encryption KMS keys, an encryption context is optional, but it is strongly
	// recommended.
	//
	// For more information, see [Encryption context] in the Key Management Service Developer Guide.
	//
	// [Encryption context]: https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#encrypt_context
	EncryptionContext map[string]string

	// A list of grant tokens.
	//
	// Use a grant token when your permission to call this operation comes from a new
	// grant that has not yet achieved eventual consistency. For more information, see [Grant token]
	// and [Using a grant token]in the Key Management Service Developer Guide.
	//
	// [Grant token]: https://docs.aws.amazon.com/kms/latest/developerguide/grants.html#grant_token
	// [Using a grant token]: https://docs.aws.amazon.com/kms/latest/developerguide/grant-manage.html#using-grant-token
	GrantTokens []string

	// The length of the data key. Use AES_128 to generate a 128-bit symmetric key, or
	// AES_256 to generate a 256-bit symmetric key.
	KeySpec types.DataKeySpec

	// The length of the data key in bytes. For example, use the value 64 to generate
	// a 512-bit data key (64 bytes is 512 bits). For common key lengths (128-bit and
	// 256-bit symmetric keys), we recommend that you use the KeySpec field instead of
	// this one.
	NumberOfBytes *int32

	noSmithyDocumentSerde
}

type GenerateDataKeyWithoutPlaintextOutput struct {

	// The encrypted data key. When you use the HTTP API or the Amazon Web Services
	// CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.
	CiphertextBlob []byte

	// The Amazon Resource Name ([key ARN] ) of the KMS key that encrypted the data key.
	//
	// [key ARN]: https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#key-id-key-ARN
	KeyId *string

	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata

	noSmithyDocumentSerde
}

func (c *Client) addOperationGenerateDataKeyWithoutPlaintextMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpGenerateDataKeyWithoutPlaintext{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpGenerateDataKeyWithoutPlaintext{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "GenerateDataKeyWithoutPlaintext"); err != nil {
		return fmt.Errorf("add protocol finalizers: %v", err)
	}

	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = addClientRequestID(stack); err != nil {
		return err
	}
	if err = addComputeContentLength(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = addComputePayloadSHA256(stack); err != nil {
		return err
	}
	if err = addRetry(stack, options); err != nil {
		return err
	}
	if err = addRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = addRecordResponseTiming(stack); err != nil {
		return err
	}
	if err = addClientUserAgent(stack, options); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
		return err
	}
	if err = addTimeOffsetBuild(stack, c); err != nil {
		return err
	}
	if err = addUserAgentRetryMode(stack, options); err != nil {
		return err
	}
	if err = addOpGenerateDataKeyWithoutPlaintextValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGenerateDataKeyWithoutPlaintext(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = addRecursionDetection(stack); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	if err = addDisableHTTPSMiddleware(stack, options); err != nil {
		return err
	}
	return nil
}

func newServiceMetadataMiddleware_opGenerateDataKeyWithoutPlaintext(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		OperationName: "GenerateDataKeyWithoutPlaintext",
	}
}