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.
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
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.
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.