Struct aws_sdk_kms::client::fluent_builders::GenerateMac

pub struct GenerateMac { /* private fields */ }

Fluent builder constructing a request to GenerateMac.

Generates a hash-based message authentication code (HMAC) for a message using an HMAC KMS key and a MAC algorithm that the key supports. The MAC algorithm computes the HMAC for the message and the key as described in RFC 2104.

You can use the HMAC that this operation generates with the VerifyMac operation to demonstrate that the original message has not changed. Also, because a secret key is used to create the hash, you can verify that the party that generated the hash has the required secret key. This operation is part of KMS support for HMAC KMS keys. For details, see HMAC keys in KMS in the Key Management Service Developer Guide .

Best practices recommend that you limit the time during which any signing mechanism, including an HMAC, is effective. This deters an attack where the actor uses a signed message to establish validity repeatedly or long after the message is superseded. HMAC tags do not include a timestamp, but you can include a timestamp in the token or message to help you detect when its time to refresh the HMAC.

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:GenerateMac (key policy)

Related operations: VerifyMac

Implementations

impl GenerateMac

pub async fn send(self) -> Result<GenerateMacOutput, SdkError<GenerateMacError>>

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 message(self, input: Blob) -> Self

The message to be hashed. Specify a message of up to 4,096 bytes.

GenerateMac and VerifyMac do not provide special handling for message digests. If you generate an HMAC for a hash digest of a message, you must verify the HMAC of the same hash digest.

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

The message to be hashed. Specify a message of up to 4,096 bytes.

GenerateMac and VerifyMac do not provide special handling for message digests. If you generate an HMAC for a hash digest of a message, you must verify the HMAC of the same hash digest.

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

The HMAC KMS key to use in the operation. The MAC algorithm computes the HMAC for the message and the key as described in RFC 2104.

To identify an HMAC KMS key, use the DescribeKey operation and see the KeySpec field in the response.

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

The HMAC KMS key to use in the operation. The MAC algorithm computes the HMAC for the message and the key as described in RFC 2104.

To identify an HMAC KMS key, use the DescribeKey operation and see the KeySpec field in the response.

pub fn mac_algorithm(self, input: MacAlgorithmSpec) -> Self

The MAC algorithm used in the operation.

The algorithm must be compatible with the HMAC KMS key that you specify. To find the MAC algorithms that your HMAC KMS key supports, use the DescribeKey operation and see the MacAlgorithms field in the DescribeKey response.

pub fn set_mac_algorithm(self, input: Option<MacAlgorithmSpec>) -> Self

The MAC algorithm used in the operation.

The algorithm must be compatible with the HMAC KMS key that you specify. To find the MAC algorithms that your HMAC KMS key supports, use the DescribeKey operation and see the MacAlgorithms field in the DescribeKey response.

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.

Trait Implementations

impl Clone for GenerateMac

fn clone(&self) -> GenerateMac

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for GenerateMac

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

Formats the value using the given formatter.