NAME

Paws::KMS::GrantConstraints

USAGE

This class represents one of two things:

Arguments in a call to a service

Use the attributes of this class as arguments to methods. You shouldn't make instances of this class. Each attribute should be used as a named argument in the calls that expect this type of object.

As an example, if Att1 is expected to be a Paws::KMS::GrantConstraints object:

  $service_obj->Method(Att1 => { EncryptionContextEquals => $value, ..., EncryptionContextSubset => $value  });

Results returned from an API call

Use accessors for each attribute. If Att1 is expected to be an Paws::KMS::GrantConstraints object:

  $result = $service_obj->Method(...);
  $result->Att1->EncryptionContextEquals

DESCRIPTION

Use this structure to allow cryptographic operations (https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#cryptographic-operations) in the grant only when the operation request includes the specified encryption context (https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#encrypt_context).

AWS KMS applies the grant constraints only to cryptographic operations that support an encryption context, that is, all cryptographic operations with a symmetric CMK (https://docs.aws.amazon.com/kms/latest/developerguide/symm-asymm-concepts.html#symmetric-cmks). Grant constraints are not applied to operations that do not support an encryption context, such as cryptographic operations with asymmetric CMKs and management operations, such as DescribeKey or RetireGrant.

In a cryptographic operation, the encryption context in the decryption operation must be an exact, case-sensitive match for the keys and values in the encryption context of the encryption operation. Only the order of the pairs can vary.

However, in a grant constraint, the key in each key-value pair is not case sensitive, but the value is case sensitive.

To avoid confusion, do not use multiple encryption context pairs that differ only by case. To require a fully case-sensitive encryption context, use the "kms:EncryptionContext:" and "kms:EncryptionContextKeys" conditions in an IAM or key policy. For details, see kms:EncryptionContext: (https://docs.aws.amazon.com/kms/latest/developerguide/policy-conditions.html#conditions-kms-encryption-context) in the AWS Key Management Service Developer Guide .

ATTRIBUTES

SEE ALSO

This class forms part of Paws, describing an object used in Paws::KMS

BUGS and CONTRIBUTIONS

The source code is located here: <https://github.com/pplu/aws-sdk-perl>

Please report bugs to: <https://github.com/pplu/aws-sdk-perl/issues>