Struct DecapsulateFluentBuilder 

pub struct DecapsulateFluentBuilder { /* private fields */ }

Fluent builder constructing a request to Decapsulate.

Recovers the shared secret that was encapsulated with the public key of an ML-KEM KMS key. Module-Lattice-Based Key-Encapsulation Mechanism (ML-KEM), specified in FIPS 203 on the NIST website, is a post-quantum algorithm for establishing a shared secret between two parties. For an example of how two parties establish a shared secret over an insecure channel using ML-KEM, see ML-KEM keys in KMS in the Key Management Service Developer Guide.

The Decapsulate operation is not available in China Regions.

Decapsulate returns the shared secret as a 32-byte value. You can use it directly as key material, or run it through a key derivation function to derive multiple keys and nonces.

Decapsulate returns an InvalidCiphertextException when the length of the SharedSecretCiphertextBlob is inconsistent with the ML-KEM key spec. In all other cases, Decapsulate returns a 32-byte pseudo-random value. This is true even when the SharedSecretCiphertextBlob was created using a different ML-KEM key or altered from its original value. This behavior is a security feature called implicit rejection that helps protect against chosen-ciphertext attacks.

Because a response does not indicate that the ciphertext and key are valid, confirm the two parties derived the same shared secret before using it.

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:Decapsulate (key policy)

Related operations:

• Encapsulate

• CreateKey

• GetPublicKey

• DescribeKey

Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.

Implementations

impl DecapsulateFluentBuilder

pub fn as_input(&self) -> &DecapsulateInputBuilder

Access the Decapsulate as a reference.

pub async fn send( self, ) -> Result<DecapsulateOutput, SdkError<DecapsulateError, HttpResponse>>

Sends the request and returns the response.

If an error occurs, an SdkError will be returned with additional details that can be matched against.

By default, any retryable failures will be retried twice. Retry behavior is configurable with the RetryConfig, which can be set when configuring the client.

pub fn customize( self, ) -> CustomizableOperation<DecapsulateOutput, DecapsulateError, Self>

Consumes this builder, creating a customizable operation that can be modified before being sent.

pub fn key_id(self, input: impl Into<String>) -> Self

Identifies the asymmetric ML-KEM KMS key whose public key was used to produce the encapsulated shared secret. KMS uses the private key in the specified key pair to decapsulate the shared secret.

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.

pub fn set_key_id(self, input: Option<String>) -> Self

Identifies the asymmetric ML-KEM KMS key whose public key was used to produce the encapsulated shared secret. KMS uses the private key in the specified key pair to decapsulate the shared secret.

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.

pub fn get_key_id(&self) -> &Option<String>

Identifies the asymmetric ML-KEM KMS key whose public key was used to produce the encapsulated shared secret. KMS uses the private key in the specified key pair to decapsulate the shared secret.

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.

pub fn shared_secret_ciphertext_blob(self, input: Blob) -> Self

The encapsulated (ciphertext) form of the shared secret to recover. This is the SharedSecretCiphertextBlob value that the Encapsulate operation returns. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.

pub fn set_shared_secret_ciphertext_blob(self, input: Option<Blob>) -> Self

The encapsulated (ciphertext) form of the shared secret to recover. This is the SharedSecretCiphertextBlob value that the Encapsulate operation returns. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.

pub fn get_shared_secret_ciphertext_blob(&self) -> &Option<Blob>

The encapsulated (ciphertext) form of the shared secret to recover. This is the SharedSecretCiphertextBlob value that the Encapsulate operation returns. When you use the HTTP API or the Amazon Web Services CLI, the value is Base64-encoded. Otherwise, it is not Base64-encoded.

pub fn encapsulation_algorithm(self, input: EncapsulationAlgorithmSpec) -> Self

Specifies the key encapsulation algorithm used to recover the shared secret. The only valid value is ML_KEM.

pub fn set_encapsulation_algorithm( self, input: Option<EncapsulationAlgorithmSpec>, ) -> Self

Specifies the key encapsulation algorithm used to recover the shared secret. The only valid value is ML_KEM.

pub fn get_encapsulation_algorithm(&self) -> &Option<EncapsulationAlgorithmSpec>

Specifies the key encapsulation algorithm used to recover the shared secret. The only valid value is ML_KEM.

pub fn grant_tokens(self, input: impl Into<String>) -> Self

Appends an item to GrantTokens.

To override the contents of this collection use set_grant_tokens.

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.

pub fn set_grant_tokens(self, input: Option<Vec<String>>) -> Self

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.

pub fn get_grant_tokens(&self) -> &Option<Vec<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.

pub fn dry_run(self, input: bool) -> Self

Checks if your request will succeed. DryRun is an optional parameter.

To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.

pub fn set_dry_run(self, input: Option<bool>) -> Self

Checks if your request will succeed. DryRun is an optional parameter.

To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.

pub fn get_dry_run(&self) -> &Option<bool>

Checks if your request will succeed. DryRun is an optional parameter.

To learn more about how to use this parameter, see Testing your permissions in the Key Management Service Developer Guide.

Trait Implementations

impl Clone for DecapsulateFluentBuilder

fn clone(&self) -> DecapsulateFluentBuilder

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DecapsulateFluentBuilder

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.