AmazonKMS Class

Properties   Methods   Events   Config Settings   Errors  

The AmazonKMS class provides an easy-to-use interface for Amazon's Key Management Service.

Syntax

class cloudkeys.AmazonKMS

Remarks

The AmazonKMS class makes it easy to work with the Amazon Key Management Service (KMS) in a secure manner using TLS. Amazon KMS allows you to create, manage, and use KMS keys for cryptographic operations. You can also work with aliases, and generate data keys and data key pairs.

To begin, register for an AWS account and obtain an access_key and secret_key to use for authentication. Once one or more KMS keys have been created, either via the AWS console (recommended) or this API, you'll be ready to start using the class to manage and use the KMS keys.

Resource Terminology

As implied above, there are three kinds of resources associated with Amazon KMS. The primary resource type is the AWS KMS key, or "KMS key". KMS keys can be symmetric or asymmetric, and can be used either for encryption and decryption, or signing and verification. KMS keys themselves can never leave the Amazon cloud, they are used for server-side cryptographic operations only. This is a security feature, but it does mean that the amount of data that can be processed in a KMS key-based cryptographic operation is relatively small.

To work around the small server-side cryptographic operation data limit, Amazon KMS also supports the generation of data keys (symmetric) and data key pairs (asymmetric), which can then be used outside of Amazon KMS in order to encrypt/decrypt and sign/verify larger amounts data. KMS itself only generates these keys, it does not track them or make use of them for cryptographic operations. However, it does encrypt the data key (or, for data key pairs, the private key) using a KMS key when it is generated, which means that the key must be decrypted using a KMS key each time it needs to be used. For more information, refer to Amazon's Envelope Encryption description, which details the many security benefits of this strategy.

The last resource is called an alias. Aliases provide friendly names for KMS keys, which can otherwise only be identified by their Id or Amazon resource name (ARN). Since an alias is a standalone resource, it can be created and deleted without affecting the KMS key it refers to. It can also be updated to refer to a different KMS key at any time.

Note: KMS keys and aliases are region-specific resources. That is, KMS keys and aliases cannot be accessed or used outside of the region that they reside in.

Using the Class

KMS keys can be created using the create_key method. A KMS key's key spec (i.e., whether it is symmetric or asymmetric, and in the latter case, what kind of asymmetric) and usage (i.e., whether it is for encryption/decryption or signing/verification) must be set at the time of creation, and they cannot be changed later. A description of the KMS key can also be provided when it is created, and can be changed at any time using the update_key_description method.

When a KMS key will no longer be used, it can be scheduled for deletion using the schedule_key_deletion method. AWS requires that KMS keys remain in a "pending deletion" state for at least seven days to help ensure that they are truly no longer needed. If at any time during the waiting period it is discovered that the KMS key is still needed, the deletion can be canceled using the cancel_key_deletion method (KMS keys cannot be used while they are pending deletion). // The CreateKey method returns the Amazon resource name of the newly-created KMS key. string keyArn = kms.CreateKey("SYMMETRIC_DEFAULT", false, "Test key"); // ... Some time later ... // Schedules the KMS key for deletion in 15 days. kms.ScheduleKeyDeletion(keyArn, 15);

Aliases can be created and deleted using the create_alias and delete_alias methods. Also, while aliases can be updated to refer to a different KMS key at any time during their lifetime. Note that all alias names must begin with the prefix alias/ (but cannot begin with alias/aws/, which is a reserved prefix). kms.CreateAlias("alias/MyTestKey", keyArn); kms.UpdateAlias("alias/MyTestKey", otherKeyArn); kms.DeleteAlias("alias/MyTestKey"); // Only deletes the alias; the KMS key it refers to is unaffected.

To list KMS keys or aliases, use the list_keys and list_aliases methods. For the former, the include_key_details property can optionally be enabled to have the class attempt to retrieve the full information for each KMS key (Amazon only returns the KMS key's ARN and Id while listing). // If there are many KMS keys to list, there may be multiple pages of results. This will // cause all pages of results to be accumulated into the Keys collection property. do { kms.ListKeys(); } while (!string.IsNullOrEmpty(kms.KeyMarker)); foreach (AWSKey key in kms.Keys) { Console.WriteLine(key.ARN); }

Depending on a KMS key's usage, it can be used to perform different cryptographic operations. KMS keys with encryption/decryption usage can be used in encrypt, decrypt, and re_encrypt operations. KMS keys with sign/verify usage can be used in sign and verify operations. To perform a cryptographic operation, use input_data or input_file to supply the input data that should be processed. All operations will output the result data to output_data or output_file (except verify; refer to its documentation for more information). // Create an asymmetric KMS key with encrypt/decrypt usage. string keyArn = kms.CreateKey("RSA_4096", false, "Encryption Key #237"); // Encrypt the string "Test123" and write the encrypted data to an output file. kms.InputData = "Test123"; kms.OutputFile = "C:/temp/enc.dat"; kms.Encrypt(keyArn, "RSAES_OAEP_SHA_256"); // ...Later, decrypt the data again. kms.InputFile = "C:/temp/enc.dat"; kms.OutputFile = ""; // So that the data will be output to the OutputData property. kms.Decrypt(keyArn, "RSAES_OAEP_SHA_256");

It's important to note that the amount of data that can be processed in server-side cryptographic operations is very small. For signing operations, it is limited to 4096 bytes; for encryption operations, the limit varies based on the selected KMS key's key spec and the selected encryption algorithm (see the encrypt method's documentation for more information).

To work around this issue, Amazon KMS supports the generation of data keys and data key pairs (described above) which can be used locally to encrypt/decrypt or sign/verify large amounts of data. To generate a data key or a data key pair, call the generate_data_key and generate_data_key_pair methods. // Generates a data key, including a plaintext copy. // The encrypted copy is encrypted by the specified KMS key. kms.GenerateDataKey("AES_256", keyArn, true); // The resulting information is stored in the following properties: // kms.KeyData.ARN: The ARN of the KMS key used to encrypt the data key. // kms.KeyData.EncryptedKey: The encrypted copy of the data key. // kms.KeyData.KeySpec: The spec of the generated data key. // kms.KeyData.PlaintextKey: The plaintext copy of the data key (if it was requested). // Generates a data key pair, including plaintext copy. // The encrypted copy of the private key is encrypted by the specified KMS key. kms.GenerateDataKeyPair("ECC_NIST_P384", keyArn, true); // The resulting information is stored in the following properties: // kms.KeyData.ARN: The ARN of the KMS key used to encrypt the data key pair's private key. // kms.KeyData.EncryptedKey: The encrypted copy of the private key. // kms.KeyData.KeySpec: The spec of the generated data key pair. // kms.KeyData.PlaintextKey: The plaintext copy of the private key (if it was requested). // kms.KeyData.PublicKey: The data key pair's public key.

The class also supports a variety of other functionality, including:

• Retrieval of an asymmetric KMS key's public key with get_public_key.
• Enabling and disabling KMS keys with set_key_enabled.
• Automatic rotation of KMS keys with get_key_rotation_status and set_key_rotation_status.
• Encryption contexts for encrypt, decrypt, and re_encrypt.
• And more!

Property List

The following is the full list of the properties of the class with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the class with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the class with short descriptions. Click on the links for further details.

access_key Property

The access key to use for authentication.

Syntax

def get_access_key() -> str: ...
def set_access_key(value: str) -> None: ...

access_key = property(get_access_key, set_access_key)

Default Value

""

Remarks

This property specifies the access key that should be used for authentication. Both this property and secret_key must be set before attempting any operations which connect to the server.

alias_count Property

The number of records in the Alias arrays.

Syntax

def get_alias_count() -> int: ...

alias_count = property(get_alias_count, None)

Default Value

0

Remarks

This property controls the size of the following arrays:

• alias_arn
• alias_key_id
• alias_name

The array indices start at 0 and end at alias_count - 1.

This property is read-only.

alias_arn Property

The Amazon resource name (ARN) of the alias.

Syntax

def get_alias_arn(alias_index: int) -> str: ...

Default Value

""

Remarks

The Amazon resource name (ARN) of the alias.

This property reflects the Amazon resource name (ARN) of the alias.

The alias_index parameter specifies the index of the item in the array. The size of the array is controlled by the alias_count property.

This property is read-only.

alias_key_id Property

The Id of the KMS key that the alias is associated with.

Syntax

def get_alias_key_id(alias_index: int) -> str: ...

Default Value

""

Remarks

The Id of the KMS key that the alias is associated with.

This property reflects the Id of the KMS key that the alias is associated with.

Note that AWS pre-creates certain aliases, so it is possible for this property to be empty.

The alias_index parameter specifies the index of the item in the array. The size of the array is controlled by the alias_count property.

This property is read-only.

alias_name Property

The name of the alias.

Syntax

def get_alias_name(alias_index: int) -> str: ...

Default Value

""

Remarks

The name of the alias.

This property reflects the name of the alias, including the alias/ prefix.

The alias_index parameter specifies the index of the item in the array. The size of the array is controlled by the alias_count property.

This property is read-only.

alias_marker Property

A marker indicating what page of aliases to return next.

Syntax

def get_alias_marker() -> str: ...
def set_alias_marker(value: str) -> None: ...

alias_marker = property(get_alias_marker, set_alias_marker)

Default Value

""

Remarks

This property will be populated when list_aliases is called if the results are pages and there are more pages. To list all aliases, continue to call list_aliases until this property returns empty string.

Refer to list_aliases for more information.

encryption_context_count Property

The number of records in the EncryptionContext arrays.

Syntax

def get_encryption_context_count() -> int: ...
def set_encryption_context_count(value: int) -> None: ...

encryption_context_count = property(get_encryption_context_count, set_encryption_context_count)

Default Value

0

Remarks

This property controls the size of the following arrays:

• encryption_context_name
• encryption_context_value

The array indices start at 0 and end at encryption_context_count - 1.

encryption_context_name Property

The name of the context item.

Syntax

def get_encryption_context_name(encryption_context_index: int) -> str: ...
def set_encryption_context_name(encryption_context_index: int, value: str) -> None: ...

Default Value

""

Remarks

The name of the context item.

This property specifies the name of the context item.

The encryption_context_index parameter specifies the index of the item in the array. The size of the array is controlled by the encryption_context_count property.

encryption_context_value Property

The value of the context item.

Syntax

def get_encryption_context_value(encryption_context_index: int) -> str: ...
def set_encryption_context_value(encryption_context_index: int, value: str) -> None: ...

Default Value

""

Remarks

The value of the context item.

This property specifies the value of the context item.

The encryption_context_index parameter specifies the index of the item in the array. The size of the array is controlled by the encryption_context_count property.

firewall_auto_detect Property

This property tells the class whether or not to automatically detect and use firewall system settings, if available.

Syntax

def get_firewall_auto_detect() -> bool: ...
def set_firewall_auto_detect(value: bool) -> None: ...

firewall_auto_detect = property(get_firewall_auto_detect, set_firewall_auto_detect)

Default Value

FALSE

Remarks

This property tells the class whether or not to automatically detect and use firewall system settings, if available.

firewall_type Property

This property determines the type of firewall to connect through.

Syntax

def get_firewall_type() -> int: ...
def set_firewall_type(value: int) -> None: ...

firewall_type = property(get_firewall_type, set_firewall_type)

Default Value

0

Remarks

This property determines the type of firewall to connect through. The applicable values are as follows:

firewall_host Property

This property contains the name or IP address of firewall (optional).

Syntax

def get_firewall_host() -> str: ...
def set_firewall_host(value: str) -> None: ...

firewall_host = property(get_firewall_host, set_firewall_host)

Default Value

""

Remarks

This property contains the name or IP address of firewall (optional). If a firewall_host is given, the requested connections will be authenticated through the specified firewall when connecting.

If this property is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, the class fails with an error.

firewall_password Property

This property contains a password if authentication is to be used when connecting through the firewall.

Syntax

def get_firewall_password() -> str: ...
def set_firewall_password(value: str) -> None: ...

firewall_password = property(get_firewall_password, set_firewall_password)

Default Value

""

Remarks

This property contains a password if authentication is to be used when connecting through the firewall. If firewall_host is specified, the firewall_user and firewall_password properties are used to connect and authenticate to the given firewall. If the authentication fails, the class fails with an error.

firewall_port Property

This property contains the transmission control protocol (TCP) port for the firewall Host .

Syntax

def get_firewall_port() -> int: ...
def set_firewall_port(value: int) -> None: ...

firewall_port = property(get_firewall_port, set_firewall_port)

Default Value

0

Remarks

This property contains the transmission control protocol (TCP) port for the firewall firewall_host. See the description of the firewall_host property for details.

Note: This property is set automatically when firewall_type is set to a valid value. See the description of the firewall_type property for details.

firewall_user Property

This property contains a user name if authentication is to be used connecting through a firewall.

Syntax

def get_firewall_user() -> str: ...
def set_firewall_user(value: str) -> None: ...

firewall_user = property(get_firewall_user, set_firewall_user)

Default Value

""

Remarks

This property contains a user name if authentication is to be used connecting through a firewall. If the firewall_host is specified, this property and firewall_password properties are used to connect and authenticate to the given firewall. If the authentication fails, the class fails with an error.

idle Property

The current status of the class.

Syntax

def get_idle() -> bool: ...

idle = property(get_idle, None)

Default Value

TRUE

Remarks

idle will be False if the component is currently busy (communicating and/or waiting for an answer), and True at all other times.

This property is read-only.

include_key_details Property

Whether to attempt to retrieve full details when listing KMS keys.

Syntax

def get_include_key_details() -> bool: ...
def set_include_key_details(value: bool) -> None: ...

include_key_details = property(get_include_key_details, set_include_key_details)

Default Value

FALSE

Remarks

This property specifies whether the class should make additional requests when list_keys is called in order to retrieve full information for each KMS key. By default, Amazon will only return the key_arn and key_id of each KMS key.

If this property is enabled, then after the initial listing is returned, the class will call get_key_info internally for each KMS key returned. For all KMS keys for which this call is successful, the additional information will be used to populate the Key* properties. Any KMS keys for which the get_key_info call fails will only have their key_arn and key_id properties populated, as usual.

input_data Property

The data to process.

Syntax

def get_input_data() -> bytes: ...
def set_input_data(value: bytes) -> None: ...

input_data = property(get_input_data, set_input_data)

Default Value

""

Remarks

This property specifies the data that should be processed in a cryptographic operation.

Input Sources & Output Destinations

The class automatically determines the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

1. The input_file property
2. The input_data property

The first valid input source found is used. The order in which the output properties are considered is as follows:

1. The output_file property
2. The output_data property

input_file Property

The file whose data should be processed.

Syntax

def get_input_file() -> str: ...
def set_input_file(value: str) -> None: ...

input_file = property(get_input_file, set_input_file)

Default Value

""

Remarks

This property specifies the file whose data should be processed in a cryptographic operation. It accepts both absolute and relative file paths.

Input Sources & Output Destinations

The class automatically determines the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

1. The input_file property
2. The input_data property

The first valid input source found is used. The order in which the output properties are considered is as follows:

1. The output_file property
2. The output_data property

key_data_algorithms Property

The algorithms supported by the public key.

Syntax

def get_key_data_algorithms() -> str: ...

key_data_algorithms = property(get_key_data_algorithms, None)

Default Value

""

Remarks

The algorithms supported by the public key.

When get_public_key is called, this property will contain a comma-separated list of algorithms that the key_public_key can be used with. Always empty when generate_data_key or generate_data_key_pair is called.

If key_for_signing is False, possible values are:

• SYMMETRIC_DEFAULT
• RSAES_OAEP_SHA_1
• RSAES_OAEP_SHA_256

If key_for_signing is True, possible values are:

• RSASSA_PSS_SHA_256
• RSASSA_PSS_SHA_384
• RSASSA_PSS_SHA_512
• RSASSA_PKCS1_V1_5_SHA_256
• RSASSA_PKCS1_V1_5_SHA_384
• RSASSA_PKCS1_V1_5_SHA_512
• ECDSA_SHA_256
• ECDSA_SHA_384
• ECDSA_SHA_512

This property is read-only.

key_data_arn Property

The Amazon resource name (ARN) of the associated KMS key.

Syntax

def get_key_data_arn() -> str: ...

key_data_arn = property(get_key_data_arn, None)

Default Value

""

Remarks

The Amazon resource name (ARN) of the associated KMS key.

When get_public_key is called, this property reflects the Amazon resource name (ARN) of the KMS key whose key_public_key was downloaded.

When generate_data_key or generate_data_key_pair is called, this property reflects the ARN of the KMS key that encrypted the data key or the data key pair's private key (respectively) that is stored in key_encrypted_key.

This property is read-only.

key_data_encrypted_key Property

The encrypted key or private key data.

Syntax

def get_key_data_encrypted_key() -> bytes: ...

key_data_encrypted_key = property(get_key_data_encrypted_key, None)

Default Value

""

Remarks

The encrypted key or private key data.

When generate_data_key is called, this property reflects the encrypted data key that was downloaded. When generate_data_key_pair is called, this property reflects the encrypted private key of the data key pair that was downloaded.

In the case of generate_data_key_pair, note that the actual private key data will be in DER format upon decryption. It is up to the application to convert it to another format after decryption if necessary.

Always empty when get_public_key is called.

This property is read-only.

key_data_for_signing Property

Whether the public key is for signing or encryption.

Syntax

def get_key_data_for_signing() -> bool: ...

key_data_for_signing = property(get_key_data_for_signing, None)

Default Value

FALSE

Remarks

Whether the public key is for signing or encryption.

When get_public_key is called, this property reflects whether the downloaded key_public_key is to be used for verification (True) or encryption (False).

Always False when generate_data_key or generate_data_key_pair is called.

This property is read-only.

key_data_key_spec Property

The key spec of the downloaded key data.

Syntax

def get_key_data_key_spec() -> str: ...

key_data_key_spec = property(get_key_data_key_spec, None)

Default Value

""

Remarks

The key spec of the downloaded key data.

When get_public_key is called, this property reflects the spec of the KMS key whose key_public_key was downloaded, and the possible values are:

• RSA_2048
• RSA_3072
• RSA_4096
• ECC_NIST_P256 (secp256r1)
• ECC_NIST_P384 (secp384r1)
• ECC_NIST_P521 (secp521r1)
• ECC_SECG_P256K1 (secp256k1)

When generate_data_key is called, this property reflects either the spec of the data key or the size of the data key in bytes (whichever was passed to the method); one of:

• AES_128
• AES_256
• Some number of bytes in the range 1 to 1024 (e.g., 64)

When generate_data_key_pair is called, this property reflects the spec of the data key pair, and the possible values are the same as they are for get_public_key.

This property is read-only.

key_data_plaintext_key Property

The plaintext key or private key data.

Syntax

def get_key_data_plaintext_key() -> bytes: ...

key_data_plaintext_key = property(get_key_data_plaintext_key, None)

Default Value

""

Remarks

The plaintext key or private key data.

If, when generate_data_key or generate_data_key_pair is called, the IncludePlaintext parameter was True, this property will reflect the plaintext data key or private key of the data key pair (respectively) that was downloaded. Otherwise, it will be empty.

In the case of generate_data_key_pair, this property exposes the private key in PEM format for convenience.

Always empty when get_public_key is called.

This property is read-only.

key_data_public_key Property

The public key.

Syntax

def get_key_data_public_key() -> str: ...

key_data_public_key = property(get_key_data_public_key, None)

Default Value

""

Remarks

The public key.

When get_public_key is called, this property will reflect the public key of the KMS key. When generate_data_key_pair is called, this property will reflect the public key of the data key pair. The public key is exposed in PEM format for convenience.

Always empty when generate_data_key is called.

This property is read-only.

key_marker Property

A marker indicating what page of KMS keys to return next.

Syntax

def get_key_marker() -> str: ...
def set_key_marker(value: str) -> None: ...

key_marker = property(get_key_marker, set_key_marker)

Default Value

""

Remarks

This property will be populated when list_keys is called if the results are paged and there are more pages. To list all KMS keys, continue to call list_keys until this property returns empty string.

Refer to list_keys for more information.

key_count Property

The number of records in the Key arrays.

Syntax

def get_key_count() -> int: ...

key_count = property(get_key_count, None)

Default Value

0

Remarks

This property controls the size of the following arrays:

• key_account_id
• key_algorithms
• key_arn
• key_aws_managed
• key_cloud_hsm_cluster_id
• key_creation_date
• key_custom_key_store_id
• key_data_algorithms
• key_data_arn
• key_data_encrypted_key
• key_data_for_signing
• key_data_key_spec
• key_data_plaintext_key
• key_data_public_key
• key_deletion_date
• key_description
• key_enabled
• key_expiration_date
• key_for_signing
• key_id
• key_key_spec
• key_origin
• key_state

The array indices start at 0 and end at key_count - 1.

This property is read-only.

key_account_id Property

The Id of the AWS account that owns the KMS key.

Syntax

def get_key_account_id(key_index: int) -> str: ...

Default Value

""

Remarks

The Id of the AWS account that owns the KMS key.

This property reflects the Id of the AWS account that owns the KMS key.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_algorithms Property

A comma-separated list of algorithms that the KMS key supports.

Syntax

def get_key_algorithms(key_index: int) -> str: ...

Default Value

""

Remarks

A comma-separated list of algorithms that the KMS key supports.

This property reflects a comma-separated list of algorithms that the KMS key supports.

If key_for_signing is False, possible values are:

• SYMMETRIC_DEFAULT
• RSAES_OAEP_SHA_1
• RSAES_OAEP_SHA_256

If key_for_signing is True, possible values are:

• RSASSA_PSS_SHA_256
• RSASSA_PSS_SHA_384
• RSASSA_PSS_SHA_512
• RSASSA_PKCS1_V1_5_SHA_256
• RSASSA_PKCS1_V1_5_SHA_384
• RSASSA_PKCS1_V1_5_SHA_512
• ECDSA_SHA_256
• ECDSA_SHA_384
• ECDSA_SHA_512

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_arn Property

The Amazon resource name (ARN) of the KMS key.

Syntax

def get_key_arn(key_index: int) -> str: ...

Default Value

""

Remarks

The Amazon resource name (ARN) of the KMS key.

This property reflects the Amazon resource name (ARN) of the KMS key.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_aws_managed Property

Whether the KMS key is AWS-managed.

Syntax

def get_key_aws_managed(key_index: int) -> bool: ...

Default Value

FALSE

Remarks

Whether the KMS key is AWS-managed.

This property reflects whether the KMS key is AWS-managed (True) or customer-managed (False).

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_cloud_hsm_cluster_id Property

The Id of the CloudHSM cluster the KMS key's key material resides in, if applicable.

Syntax

def get_key_cloud_hsm_cluster_id(key_index: int) -> str: ...

Default Value

""

Remarks

The Id of the CloudHSM cluster the KMS key's key material resides in, if applicable.

If the KMS key resides in a custom key store, this property reflects the Id of the CloudHSM that the KMS key's key material resides in.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_creation_date Property

The creation date of the KMS key.

Syntax

def get_key_creation_date(key_index: int) -> str: ...

Default Value

""

Remarks

The creation date of the KMS key.

This property reflects the creation date of the KMS key, in seconds since the Unix epoch (including fractional seconds).

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_custom_key_store_id Property

The Id of the custom key store that the KMS key resides in, if applicable.

Syntax

def get_key_custom_key_store_id(key_index: int) -> str: ...

Default Value

""

Remarks

The Id of the custom key store that the KMS key resides in, if applicable.

If the KMS key resides in a custom key store, this property reflects the Id of said custom key store.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_deletion_date Property

The date at which the KMS key will be deleted, if applicable.

Syntax

def get_key_deletion_date(key_index: int) -> str: ...

Default Value

""

Remarks

The date at which the KMS key will be deleted, if applicable.

If the KMS key's key_state is aksPendingDeletion (2), this property will reflect the deletion date, in seconds since the Unix epoch (including fractional seconds).

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_description Property

The KMS key's description.

Syntax

def get_key_description(key_index: int) -> str: ...

Default Value

""

Remarks

The KMS key's description.

This property reflects the KMS key's description. To change a KMS key's description, use the update_key_description method.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_enabled Property

Whether the KMS key is enabled.

Syntax

def get_key_enabled(key_index: int) -> bool: ...

Default Value

FALSE

Remarks

Whether the KMS key is enabled.

This property reflects whether the KMS key is currently enabled.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_expiration_date Property

The date at which the KMS key's key material will expire, if applicable.

Syntax

def get_key_expiration_date(key_index: int) -> str: ...

Default Value

""

Remarks

The date at which the KMS key's key material will expire, if applicable.

If the KMS key's key material key_origin is akoExternal (1), and the external key material has an expiration date, this property will reflect said date, in seconds since the Unix epoch (including fractional seconds).

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_for_signing Property

Whether the KMS key is for signing or encryption.

Syntax

def get_key_for_signing(key_index: int) -> bool: ...

Default Value

FALSE

Remarks

Whether the KMS key is for signing or encryption.

This property reflects whether the KMS key's usage is signing/verification (True) or encryption/decryption (False).

A KMS key's usage determines which cryptographic operations it can be used for. For example, a KMS key with signing/verification usage can be used for sign and verify operations, but not for encrypt, decrypt or re_encrypt operations.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_id Property

The Id of the KMS key.

Syntax

def get_key_id(key_index: int) -> str: ...

Default Value

""

Remarks

The Id of the KMS key.

This property reflects the Id of the KMS key.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_key_spec Property

The key spec of the KMS key.

Syntax

def get_key_key_spec(key_index: int) -> str: ...

Default Value

""

Remarks

The key spec of the KMS key.

This property reflects the key spec of the KMS key. For symmetric KMS keys, the only possible value is SYMMETRIC_DEFAULT which, according to the Amazon KMS documentation, is based on AES-256-GCM. For asymmetric KMS keys, possible values are:

• RSA_2048
• RSA_3072
• RSA_4096
• ECC_NIST_P256 (secp256r1)
• ECC_NIST_P384 (secp384r1)
• ECC_NIST_P521 (secp521r1)
• ECC_SECG_P256K1 (secp256k1)

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_origin Property

The origin of the KMS key's key material.

Syntax

def get_key_origin(key_index: int) -> int: ...

Default Value

0

Remarks

The origin of the KMS key's key material.

This property reflects the origin of the KMS key's key material. Possible values are:

• akoKMS (0): Key material from Amazon KMS. (Also the default value used when list_keys is called.)
• akoExternal (1): External key material imported into Amazon KMS.
• akoCloudHSM (2): Key material from an Amazon CloudHSM cluster.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

key_state Property

The KMS key's state.

Syntax

def get_key_state(key_index: int) -> int: ...

Default Value

0

Remarks

The KMS key's state.

This property reflects the KMS key's state. Possible values are:

• aksEnabled (0): The KMS key is enabled and ready for use. (Also the default value used when list_keys is called.)
• aksDisabled (1): The KMS key is disabled and cannot be used until it is enabled again.
• aksPendingDeletion (2): The KMS key is pending deletion and cannot be used unless the deletion is canceled.
• aksPendingImport (3): The KMS key has been created, but external key material has not yet been imported into it, so it cannot be used.
• aksUnavailable (4): The KMS key is currently unavailable because the CloudHSM cluster that contains its key material has been disconnected from Amazon KMS.

The key_index parameter specifies the index of the item in the array. The size of the array is controlled by the key_count property.

This property is read-only.

local_host Property

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

def get_local_host() -> str: ...
def set_local_host(value: str) -> None: ...

local_host = property(get_local_host, set_local_host)

Default Value

""

Remarks

The local_host property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface.

If the class is connected, the local_host property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

NOTE: local_host is not persistent. You must always set it in code, and never in the property window.

other_headers Property

This property includes other headers as determined by the user (optional).

Syntax

def get_other_headers() -> str: ...
def set_other_headers(value: str) -> None: ...

other_headers = property(get_other_headers, set_other_headers)

Default Value

""

Remarks

This property can be set to a string of headers to be appended to the HTTP request headers created from other properties like content_type and from_.

The headers must follow the format Header: Value as described in the HTTP specifications. Header lines should be separated by CRLF ("\r\n") .

Use this property with caution. If this property contains invalid headers, HTTP requests may fail.

This property is useful for extending the functionality of the class beyond what is provided.

output_data Property

The output data.

Syntax

def get_output_data() -> bytes: ...
def set_output_data(value: bytes) -> None: ...

output_data = property(get_output_data, set_output_data)

Default Value

""

Remarks

This property is populated with the data that was output from a successful cryptographic operation.

Note: For the verify operation, this property functions as a secondary input property instead (along with input_data); refer to the verify method for more information.

Input Sources & Output Destinations

The class automatically determines the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

1. The input_file property
2. The input_data property

The first valid input source found is used. The order in which the output properties are considered is as follows:

1. The output_file property
2. The output_data property

output_file Property

The file to which output data should be written.

Syntax

def get_output_file() -> str: ...
def set_output_file(value: str) -> None: ...

output_file = property(get_output_file, set_output_file)

Default Value

""

Remarks

This property specifies the file to which data output from a successful cryptographic operation should be written.

Note: For the verify operation, the specified file functions as a secondary input file instead (along with input_file); refer to the verify method for more information.

Input Sources & Output Destinations

The class automatically determines the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

1. The input_file property
2. The input_data property

The first valid input source found is used. The order in which the output properties are considered is as follows:

1. The output_file property
2. The output_data property

overwrite Property

Whether the output file should be overwritten if necessary.

Syntax

def get_overwrite() -> bool: ...
def set_overwrite(value: bool) -> None: ...

overwrite = property(get_overwrite, set_overwrite)

Default Value

FALSE

Remarks

This property controls whether the specified output_file should be overwritten if it already exists.

parsed_header_count Property

The number of records in the ParsedHeader arrays.

Syntax

def get_parsed_header_count() -> int: ...

parsed_header_count = property(get_parsed_header_count, None)

Default Value

0

Remarks

This property controls the size of the following arrays:

• parsed_header_field
• parsed_header_value

The array indices start at 0 and end at parsed_header_count - 1.

This property is read-only.

parsed_header_field Property

This property contains the name of the HTTP header (this is the same case as it is delivered).

Syntax

def get_parsed_header_field(parsed_header_index: int) -> str: ...

Default Value

""

Remarks

This property contains the name of the HTTP Header (this is the same case as it is delivered).

The parsed_header_index parameter specifies the index of the item in the array. The size of the array is controlled by the parsed_header_count property.

This property is read-only.

parsed_header_value Property

This property contains the header contents.

Syntax

def get_parsed_header_value(parsed_header_index: int) -> str: ...

Default Value

""

Remarks

This property contains the Header contents.

The parsed_header_index parameter specifies the index of the item in the array. The size of the array is controlled by the parsed_header_count property.

This property is read-only.

proxy_auth_scheme Property

This property is used to tell the class which type of authorization to perform when connecting to the proxy.

Syntax

def get_proxy_auth_scheme() -> int: ...
def set_proxy_auth_scheme(value: int) -> None: ...

proxy_auth_scheme = property(get_proxy_auth_scheme, set_proxy_auth_scheme)

Default Value

0

Remarks

This property is used to tell the class which type of authorization to perform when connecting to the proxy. This is used only when the proxy_user and proxy_password properties are set.

proxy_auth_scheme should be set to authNone (3) when no authentication is expected.

By default, proxy_auth_scheme is authBasic (0), and if the proxy_user and proxy_password properties are set, the component will attempt basic authentication.

If proxy_auth_scheme is set to authDigest (1), digest authentication will be attempted instead.

If proxy_auth_scheme is set to authProprietary (2), then the authorization token will not be generated by the class. Look at the configuration file for the class being used to find more information about manually setting this token.

If proxy_auth_scheme is set to authNtlm (4), NTLM authentication will be used.

For security reasons, setting this property will clear the values of proxy_user and proxy_password.

proxy_auto_detect Property

This property tells the class whether or not to automatically detect and use proxy system settings, if available.

Syntax

def get_proxy_auto_detect() -> bool: ...
def set_proxy_auto_detect(value: bool) -> None: ...

proxy_auto_detect = property(get_proxy_auto_detect, set_proxy_auto_detect)

Default Value

FALSE

Remarks

This property tells the class whether or not to automatically detect and use proxy system settings, if available. The default value is False.

proxy_password Property

This property contains a password if authentication is to be used for the proxy.

Syntax

def get_proxy_password() -> str: ...
def set_proxy_password(value: str) -> None: ...

proxy_password = property(get_proxy_password, set_proxy_password)

Default Value

""

Remarks

This property contains a password if authentication is to be used for the proxy.

If proxy_auth_scheme is set to Basic Authentication, the proxy_user and proxy_password are Base64 encoded and the proxy authentication token will be generated in the form Basic [encoded-user-password].

If proxy_auth_scheme is set to Digest Authentication, the proxy_user and proxy_password properties are used to respond to the Digest Authentication challenge from the server.

If proxy_auth_scheme is set to NTLM Authentication, the proxy_user and proxy_password properties are used to authenticate through NTLM negotiation.

proxy_port Property

This property contains the Transmission Control Protocol (TCP) port for the proxy Server (default 80).

Syntax

def get_proxy_port() -> int: ...
def set_proxy_port(value: int) -> None: ...

proxy_port = property(get_proxy_port, set_proxy_port)

Default Value

80

Remarks

This property contains the Transmission Control Protocol (TCP) port for the proxy proxy_server (default 80). See the description of the proxy_server property for details.

proxy_server Property

If a proxy Server is given, then the HTTP request is sent to the proxy instead of the server otherwise specified.

Syntax

def get_proxy_server() -> str: ...
def set_proxy_server(value: str) -> None: ...

proxy_server = property(get_proxy_server, set_proxy_server)

Default Value

""

Remarks

If a proxy proxy_server is given, then the HTTP request is sent to the proxy instead of the server otherwise specified.

If the proxy_server property is set to a domain name, a DNS request is initiated. Upon successful termination of the request, the proxy_server property is set to the corresponding address. If the search is not successful, an error is returned.

proxy_ssl Property

This property determines when to use a Secure Sockets Layer (SSL) for the connection to the proxy.

Syntax

def get_proxy_ssl() -> int: ...
def set_proxy_ssl(value: int) -> None: ...

proxy_ssl = property(get_proxy_ssl, set_proxy_ssl)

Default Value

0

Remarks

This property determines when to use a Secure Sockets Layer (SSL) for the connection to the proxy. The applicable values are as follows:

proxy_user Property

This property contains a user name, if authentication is to be used for the proxy.

Syntax

def get_proxy_user() -> str: ...
def set_proxy_user(value: str) -> None: ...

proxy_user = property(get_proxy_user, set_proxy_user)

Default Value

""

Remarks

This property contains a username if authentication is to be used for the proxy.

If proxy_auth_scheme is set to Basic Authentication, the proxy_user and proxy_password properties are Base64 encoded and the proxy authentication token will be generated in the form Basic [encoded-user-password].

If proxy_auth_scheme is set to Digest Authentication, the proxy_user and proxy_password properties are used to respond to the Digest Authentication challenge from the server.

If proxy_auth_scheme is set to NTLM Authentication, the proxy_user and proxy_password properties are used to authenticate through NTLM negotiation.

query_param_count Property

The number of records in the QueryParam arrays.

Syntax

def get_query_param_count() -> int: ...
def set_query_param_count(value: int) -> None: ...

query_param_count = property(get_query_param_count, set_query_param_count)

Default Value

0

Remarks

This property controls the size of the following arrays:

• query_param_name
• query_param_value

The array indices start at 0 and end at query_param_count - 1.

query_param_name Property

The name of the query parameter.

Syntax

def get_query_param_name(query_param_index: int) -> str: ...
def set_query_param_name(query_param_index: int, value: str) -> None: ...

Default Value

""

Remarks

The name of the query parameter.

This property specifies the name of the query parameter.

The query_param_index parameter specifies the index of the item in the array. The size of the array is controlled by the query_param_count property.

query_param_value Property

The value of the query parameter.

Syntax

def get_query_param_value(query_param_index: int) -> str: ...
def set_query_param_value(query_param_index: int, value: str) -> None: ...

Default Value

""

Remarks

The value of the query parameter.

This property specifies the value of the query parameter. The class will automatically URL-encode this value when sending the request.

The query_param_index parameter specifies the index of the item in the array. The size of the array is controlled by the query_param_count property.

region Property

The region that the class will make requests against.

Syntax

def get_region() -> str: ...
def set_region(value: str) -> None: ...

region = property(get_region, set_region)

Default Value

"us-east-1"

Remarks

This property controls which region the class will make requests against. By default the class uses us-east-1, the US East (N. Virginia) region. This property should be changed in order to create or access resources in other regions, as KMS keys and aliases are region-specific resources.

Regions:

The class will always convert this property's value to lowercase. If this property is cleared, the class will reset it to the default value.

secret_key Property

The secret key to use for authentication.

Syntax

def get_secret_key() -> str: ...
def set_secret_key(value: str) -> None: ...

secret_key = property(get_secret_key, set_secret_key)

Default Value

""

Remarks

This property specifies the secret key that should be used for authentication. Both this property and access_key must be set before attempting any operations which connect to the server.

ssl_accept_server_cert_encoded Property

This is the certificate (PEM/base64 encoded).

Syntax

def get_ssl_accept_server_cert_encoded() -> bytes: ...
def set_ssl_accept_server_cert_encoded(value: bytes) -> None: ...

ssl_accept_server_cert_encoded = property(get_ssl_accept_server_cert_encoded, set_ssl_accept_server_cert_encoded)

Default Value

""

Remarks

This is the certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The ssl_accept_server_cert_store and ssl_accept_server_cert_subject properties also may be used to specify a certificate.

When ssl_accept_server_cert_encoded is set, a search is initiated in the current ssl_accept_server_cert_store for the private key of the certificate. If the key is found, ssl_accept_server_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_accept_server_cert_subject is set to an empty string.

ssl_cert_encoded Property

This is the certificate (PEM/base64 encoded).

Syntax

def get_ssl_cert_encoded() -> bytes: ...
def set_ssl_cert_encoded(value: bytes) -> None: ...

ssl_cert_encoded = property(get_ssl_cert_encoded, set_ssl_cert_encoded)

Default Value

""

Remarks

This is the certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The ssl_cert_store and ssl_cert_subject properties also may be used to specify a certificate.

When ssl_cert_encoded is set, a search is initiated in the current ssl_cert_store for the private key of the certificate. If the key is found, ssl_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_cert_subject is set to an empty string.

ssl_cert_store Property

This is the name of the certificate store for the client certificate.

Syntax

def get_ssl_cert_store() -> bytes: ...
def set_ssl_cert_store(value: bytes) -> None: ...

ssl_cert_store = property(get_ssl_cert_store, set_ssl_cert_store)

Default Value

"MY"

Remarks

This is the name of the certificate store for the client certificate.

The ssl_cert_store_type property denotes the type of the certificate store specified by ssl_cert_store. If the store is password protected, specify the password in ssl_cert_store_password.

ssl_cert_store is used in conjunction with the ssl_cert_subject property to specify client certificates. If ssl_cert_store has a value, and ssl_cert_subject or ssl_cert_encoded is set, a search for a certificate is initiated. Please see the ssl_cert_subject property for details.

Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

When the certificate store type is PFXFile, this property must be set to the name of the file. When the type is PFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

ssl_cert_store_password Property

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Syntax

def get_ssl_cert_store_password() -> str: ...
def set_ssl_cert_store_password(value: str) -> None: ...

ssl_cert_store_password = property(get_ssl_cert_store_password, set_ssl_cert_store_password)

Default Value

""

Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

ssl_cert_store_type Property

This is the type of certificate store for this certificate.

Syntax

def get_ssl_cert_store_type() -> int: ...
def set_ssl_cert_store_type(value: int) -> None: ...

ssl_cert_store_type = property(get_ssl_cert_store_type, set_ssl_cert_store_type)

Default Value

0

Remarks

This is the type of certificate store for this certificate.

The class supports both public and private keys in a variety of formats. When the cstAuto value is used, the class will automatically determine the type. This property can take one of the following values:

ssl_cert_subject Property

This is the subject of the certificate used for client authentication.

Syntax

def get_ssl_cert_subject() -> str: ...
def set_ssl_cert_subject(value: str) -> None: ...

ssl_cert_subject = property(get_ssl_cert_subject, set_ssl_cert_subject)

Default Value

""

Remarks

This is the subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:

If a field value contains a comma, it must be quoted.

ssl_provider Property

This specifies the SSL/TLS implementation to use.

Syntax

def get_ssl_provider() -> int: ...
def set_ssl_provider(value: int) -> None: ...

ssl_provider = property(get_ssl_provider, set_ssl_provider)

Default Value

0

Remarks

This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic) the class will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.

Possible values are:

In most cases using the default value (Automatic) is recommended. The class will select a provider depending on the current platform.

When Automatic is selected, on Windows the class will use the platform implementation. On Linux/macOS the class will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols the internal implementation is used on all platforms.

ssl_server_cert_encoded Property

This is the certificate (PEM/base64 encoded).

Syntax

def get_ssl_server_cert_encoded() -> bytes: ...

ssl_server_cert_encoded = property(get_ssl_server_cert_encoded, None)

Default Value

""

Remarks

This is the certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The ssl_server_cert_store and ssl_server_cert_subject properties also may be used to specify a certificate.

When ssl_server_cert_encoded is set, a search is initiated in the current ssl_server_cert_store for the private key of the certificate. If the key is found, ssl_server_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_server_cert_subject is set to an empty string.

This property is read-only.

timeout Property

A timeout for the class.

Syntax

def get_timeout() -> int: ...
def set_timeout(value: int) -> None: ...

timeout = property(get_timeout, set_timeout)

Default Value

60

Remarks

If the timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If timeout is set to a positive value, the class will wait for the operation to complete before returning control.

The class will use do_events to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not "freeze" and remains responsive.

If timeout expires, and the operation is not yet complete, the class fails with an error.

Please note that by default, all timeouts are inactivity timeouts, i.e. the timeout period is extended by timeout seconds when any amount of data is successfully sent or received.

The default value for the timeout property is 60 seconds.

add_encryption_context_item Method

Adds an item to the EncryptionContext properties.

Syntax

def add_encryption_context_item(name: str, value: str) -> None: ...

Remarks

This method adds an item to the EncryptionContext* properties. Name specifies the name of the item, and Value specifies the value of the item.

add_query_param Method

Adds a query parameter to the QueryParams properties.

Syntax

def add_query_param(name: str, value: str) -> None: ...

Remarks

This method is used to add a query parameter to the QueryaParam* properties. Name specifies the name of the parameter, and Value specifies the value of the parameter.

All specified Values will be URL encoded by the class automatically. Consult the service documentation for details on the available parameters.

cancel_key_deletion Method

Cancels the deletion of the specified KMS key.

Syntax

def cancel_key_deletion(key_id: str) -> None: ...

Remarks

This method cancels the deletion of the KMS key specified by KeyId. Refer to the schedule_key_deletion method for more information.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key in the current account and region.

clear_key_data Method

Clears information stored in the KeyData properties.

Syntax

def clear_key_data(plaintext_only: bool) -> None: ...

Remarks

This method clears the information stored in the KeyData* properties, removing it from memory. If the PlaintextOnly parameter is True, only the key_data_plaintext_key property is cleared.

config Method

Sets or retrieves a configuration setting.

Syntax

def config(configuration_string: str) -> str: ...

Remarks

config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

create_alias Method

Creates a new alias.

Syntax

def create_alias(name: str, key_id: str) -> None: ...

Remarks

This method creates a new alias with the given Name and associates it with the KMS key specified by KeyId.

The value passed for Name must begin with alias/, and must consist solely of alphanumeric characters, forward slashes /, underscores _, and hyphens -. The final name must not begin with alias/aws/, which is a reserved prefix.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key in the current account and region.

create_key Method

Creates a new KMS key.

Syntax

def create_key(key_spec: str, for_signing: bool, description: str) -> str: ...

Remarks

This method creates a new KMS key of the specified KeySpec, and returns its Amazon resource name (ARN). The new KMS key's Id is the last part of the returned ARN; for example, if the ARN is arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab, then the KMS key's Id is 1234abcd-12ab-34cd-56ef-1234567890ab.

The KeySpec parameter specifies the type of KMS key that should be created. To create a symmetric key, pass SYMMETRIC_DEFAULT (or empty string); this will create a key using a symmetric algorithm based on AES-256-GCM. To create an asymmetric key, pass one of the following strings instead:

• RSA_2048
• RSA_3072
• RSA_4096
• ECC_NIST_P256 (secp256r1)
• ECC_NIST_P384 (secp384r1)
• ECC_NIST_P521 (secp521r1)
• ECC_SECG_P256K1 (secp256k1)

The ForSigning parameter specifies whether the new KMS key should be for encryption and decryption (False) or signing and verification (True). However, this is only applicable for RSA key specs; symmetric keys are always for encryption/decryption, and elliptic curve key specs are always for signing/verification, so this parameter is ignored if one of those specs is passed for KeySpec.

The Description parameter specifies the KMS key's description. This description can be changed at any time using the update_key_description method.

To create the KMS key in a custom key store, set the CustomKeyStoreId configuration setting before calling this method. To set the KMS key's key policy, set the CreateKeyPolicy configuration setting before calling this method. Refer to these configuration settings for more information.

decrypt Method

Decrypts data using a KMS key.

Syntax

def decrypt(key_id: str, algorithm: str) -> None: ...

Remarks

This method decrypts data using the KMS key specified by KeyId and the given Algorithm. The data to decrypt is taken from the the specified input_file or the input_data property. The decrypted data is output to the the specified output_file or the output_data property.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key, or the name or ARN of an alias, in the current region. If an ARN is provided, it can be for a KMS key or alias in another account so long as the appropriate permissions are in place.

The Algorithm parameter specifies which algorithm to use to decrypt the data; it must match the algorithm used to encrypt the data previously. Possible values vary depending on the specified KMS key's key spec:

If Algorithm is SYMMETRIC_DEFAULT, the encryption context items in the EncryptionContext* properties will be included in the request. Keep in mind that in order to successfully decrypt the data, the exact same encryption context items that were present when the data was encrypted must be supplied again. Encryption context items are case-sensitive, but not order-sensitive.

This method will fail if any of the following are true regarding the specified KMS key:

• Its key_state is anything other than aksEnabled (0).
• It is for signing/verification instead of encryption/decryption (see key_for_signing).
• It is an AWS-managed KMS key (see key_aws_managed).

delete_alias Method

Deletes an alias.

Syntax

def delete_alias(alias_name: str) -> None: ...

Remarks

This method deletes the alias with the given AliasName.

The value passed for the AliasName parameter must include the alias/ prefix, and must be the name of an alias in the current account and region

do_events Method

Processes events from the internal message queue.

Syntax

def do_events() -> None: ...

Remarks

When do_events is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.

encrypt Method

Encrypts data using a KMS key.

Syntax

def encrypt(key_id: str, algorithm: str) -> None: ...

Remarks

This method encrypts data using the KMS key specified by KeyId and the given Algorithm. The data to encrypt is taken from the the specified input_file or the input_data property. The encrypted data is output to the the specified output_file or the output_data property.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key, or the name or ARN of an alias, in the current region. If an ARN is provided, it can be for a KMS key or alias in another account so long as the appropriate permissions are in place.

The Algorithm parameter specifies which algorithm to use to encrypt the data. Possible values vary depending on the specified KMS key's key spec. The KMS key's key spec and the selected algorithm together dictate the maximum size of the input data.

If Algorithm is SYMMETRIC_DEFAULT, the encryption context items in the EncryptionContext* properties will be included in the request. Including an encryption context when encrypting data means that the exact same encryption context must be supplied again in order to decrypt the data. Encryption context items are case-sensitive, but not order-sensitive.

This method will fail if any of the following are true regarding the specified KMS key:

• Its key_state is anything other than aksEnabled (0).
• It is for signing/verification instead of encryption/decryption (see key_for_signing).
• It is an AWS-managed KMS key (see key_aws_managed).

generate_data_key Method

Generates a data key that can be used outside of Amazon KMS.

Syntax

def generate_data_key(key_spec: str, key_id: str, include_plaintext: bool) -> None: ...

Remarks

This method generates a data key that can be used outside of Amazon KMS for encryption and decryption. The generated data key will be encrypted using the KMS key specified by KeyId before it is returned. The key and its related information will be downloaded to the following KeyData* properties, refer to their documentation for more information:

• key_data_arn
• key_data_encrypted_key
• key_data_key_spec
• key_data_plaintext_key (if True is passed for IncludePlaintext)

The KeySpec parameter specifies either the spec of the data key, or the size of the data key in bytes. Valid values are:

• AES_128
• AES_256
• Some number of bytes in the range 1 to 1024 (e.g., 64)

The value passed for the KeyId parameter must be the Id or ARN of a KMS key, or the name or ARN of an alias, in the current region. If an ARN is provided, it can be for a KMS key or alias in another account so long as the appropriate permissions are in place. The specified KMS key must be symmetric. Any encryption context items present in the EncryptionContext* properties will be included in the request and used when encrypting the data key; they must be supplied again in order to decrypt it.

The IncludePlaintext parameter specifies whether the server should return a plaintext (i.e., unencrypted) copy of the data key in addition to the encrypted copy. This can be useful if the data key will be used immediately.

This method will fail if any of the following are true regarding the specified KMS key:

• Its key_state is anything other than aksEnabled (0).
• It is asymmetric (see key_key_spec).
• It is for signing/verification instead of encryption/decryption (see key_for_signing).
• It is an AWS-managed KMS key (see key_aws_managed).

generate_data_key_pair Method

Generates a data key pair that can be used outside of Amazon KMS.

Syntax

def generate_data_key_pair(key_pair_spec: str, key_id: str, include_plaintext: bool) -> None: ...

Remarks

This method generates a data key pair that can be used outside of Amazon KMS for encryption and decryption, or signing and verification. The private key of the generated key pair will be encrypted using the KMS key specified by KeyId before it is returned. The key and its related information will be downloaded to the following KeyData* properties, refer to their documentation for more information:

• key_data_arn
• key_data_encrypted_key
• key_data_key_spec
• key_data_plaintext_key (if True is passed for IncludePlaintext)
• key_data_public_key

The KeySpec parameter specifies the spec of the data key pair. Valid values are:

• RSA_2048
• RSA_3072
• RSA_4096
• ECC_NIST_P256 (secp256r1)
• ECC_NIST_P384 (secp384r1)
• ECC_NIST_P521 (secp521r1)
• ECC_SECG_P256K1 (secp256k1)

The value passed for the KeyId parameter must be the Id or ARN of a KMS key, or the name or ARN of an alias, in the current region. If an ARN is provided, it can be for a KMS key or alias in another account so long as the appropriate permissions are in place. The specified KMS key must be symmetric. Any encryption context items present in the EncryptionContext* properties will be included in the request and used when encrypting the private key; they must be supplied again in order to decrypt it.

The IncludePlaintext parameter specifies whether the server should return a plaintext (i.e., unencrypted) copy of the data key pair's private key in addition to the encrypted copy. This can be useful if the private key will be used immediately.

This method will fail if any of the following are true regarding the specified KMS key:

• Its key_state is anything other than aksEnabled (0).
• It is asymmetric (see key_key_spec).
• It is for signing/verification instead of encryption/decryption (see key_for_signing).
• It is an AWS-managed KMS key (see key_aws_managed).

generate_random_bytes Method

Generates a cryptographically-secure random byte string.

Syntax

def generate_random_bytes(num_bytes: int) -> None: ...

Remarks

This method uses Amazon KMS to generate a cryptographically-secure random byte string of the specified length (measured in bytes). The random bytes are output to the the output_file or the output_data property.

The value passed for NumBytes must be in the range 1 to 1024.

get_key_info Method

Gets information about a KMS key.

Syntax

def get_key_info(key_id: str) -> None: ...

Remarks

This method gets information about the KMS key specified by KeyId. When the information is returned, the class clears the Key* properties and repopulates them with a single item that contains the KMS key's information. The on_key_list event is also fired.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key, or the name or ARN of an alias, in the current region. If an ARN is provided, it can be for a KMS key or alias in another account so long as the appropriate permissions are in place.

get_key_rotation_status Method

Retrieves the key rotation status for a KMS key.

Syntax

def get_key_rotation_status(key_id: str) -> bool: ...

Remarks

This method retrieves the key rotation status for the KMS key specified by KeyId; it will return True if the KMS key's key material is set to be automatically rotated, or False if not.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key in the current region. If an ARN is provided, it can be for a KMS key in another account so long as the appropriate permissions are in place.

This method will always return False for asymmetric KMS keys, KMS keys with imported key material, and KMS keys that reside in a custom key store, as such KMS keys do not support automatic key rotation. This method will also return False if the server returns an error for any other reason.

get_public_key Method

Retrieves the public key of an asymmetric KMS key.

Syntax

def get_public_key(key_id: str) -> None: ...

Remarks

This method retrieves the public key of the asymmetric KMS key specified by KeyId. The public key and its related information will be downloaded to the following KeyData* properties, refer to their documentation for more information:

• key_data_algorithms
• key_data_arn
• key_data_for_signing
• key_data_key_spec
• key_data_public_key

This method will fail if any of the following are true regarding the specified KMS key:

• Its key_state is anything other than aksEnabled (0).
• It is symmetric (see key_key_spec).
• It is an AWS-managed KMS key (see key_aws_managed).

list_aliases Method

Lists aliases in the current account and region.

Syntax

def list_aliases(for_key_id: str) -> None: ...

Remarks

This method lists the aliases in the current account and region. Optionally, aliases for a specific KMS key (in the current account and region) can be listed by passing its Id or ARN for the ForKeyId parameter.

Calling this method will fire the on_alias_list event once for each alias, and will also populate the Alias* properties.

If there are still more aliases available to list when this method returns, the alias_marker property will be populated. Continue to call this method until alias_marker is empty to accumulate all pages of results in the Alias* properties.

The MaxAliases configuration setting can be used to control the maximum number of results to return at once.

list_keys Method

Lists KMS keys in the current account and region.

Syntax

def list_keys() -> None: ...

Remarks

This method lists the KMS keys in the current account and region.

Calling this method will fire the on_key_list event once for each KMS key, and will also populate the Key* properties. However, note that by default only the key_arn and key_id properties will be populated, since the server does not return full information for KMS keys when listing them. The include_key_details property can be enabled to have the class attempt to retrieve full information for each KMS key; refer to its documentation for more information.

If there are still more KMS keys available to list when this method returns, the key_marker property will be populated. Continue to call this method until key_marker is empty to accumulate all pages of results in the Key* properties.

The MaxKeys configuration setting can be used to control the maximum number of results to return at once.

re_encrypt Method

Decrypts data using one KMS key and re-encrypts it using another KMS key.

Syntax

def re_encrypt(old_key_id: str, old_algorithm: str, new_key_id: str, new_algorithm: str) -> None: ...

Remarks

This method decrypts data using the KMS key specified by OldKeyId and re-encrypts it using the KMS key specified by NewKeyId. This process happens completely on the server; at no point is the unencrypted data transferred over the wire.

The encrypted data is taken from the the specified input_file or the input_data property. The re-encrypted data is output to the the specified output_file or the output_data property.

The values passed for the OldKeyId and NewKeyId parameters must be the Id or ARN of a KMS key, or the name or ARN of an alias, in the current region. For either or both parameters, if an ARN is provided, it can be for a KMS key or alias in another account so long as the appropriate permissions are in place.

The OldAlgorithm and NewAlgorithm parameters specify the encryption algorithm currently in use, and the new encryption algorithm, respectively. Valid values vary depending on the old and new KMS keys key specs:

If OldAlgorithm is SYMMETRIC_DEFAULT, the encryption context items in the EncryptionContext* properties will be included in the request for use with decryption. Keep in mind that in order to successfully decrypt the data, the exact same encryption context items that were present when the data was encrypted must be supplied again. Encryption context items are case-sensitive, but not order-sensitive.

If NewAlgorithm is SYMMETRIC_DEFAULT, the encryption context items in the EncryptionContext* properties will also be included in the request for use with re-encryption, effectively causing the encryption context to be transferred to the re-encrypted data. Alternatively, the NewEncryptionContext configuration setting can be set before calling this method in order to supply a new encryption context (or, if set to {}, to "remove" the existing one).

This method will fail if any of the following are true regarding either of the specified KMS keys:

• Its key_state is anything other than aksEnabled (0).
• It is for signing/verification instead of encryption/decryption (see key_for_signing).
• It is an AWS-managed KMS key (see key_aws_managed).

reset Method

Resets the class to its initial state.

Syntax

def reset() -> None: ...

Remarks

This method resets the class to its initial state.

schedule_key_deletion Method

Schedules the deletion of a KMS key.

Syntax

def schedule_key_deletion(key_id: str, days_to_wait: int) -> None: ...

Remarks

This method schedules the deletion of the KMS key specified by KeyId. The DaysToWait parameter specifies the length of the waiting period; it must be a value between 7 and 30.

When a KMS key is scheduled for deletion, it cannot be used. This is a safety feature designed to help identify any code that still relies on the KMS key.

send_custom_request Method

Sends a custom request to the server.

Syntax

def send_custom_request(action: str) -> None: ...

Remarks

This method can be used to send arbitrary requests to the server. The value passed for the Action parameter must be one of the actions described in the Amazon KMS documentation.

When this method is called, the class does the following:

1. Builds a request URL, including query parameters, based on the following:
   • region
   • QueryParam*
2. Adds request headers from other_headers.
3. Adds any request body supplied via the specified input_file or input_data.
4. Signs the request.
5. Sends the request to the server.
6. Stores the response headers in the ParsedHeader* properties; and the response body in the specified output_file or output_data.

If the response body is JSON data, the XPath, XText, and other X* configuration settings can then be used to navigate and extract information from it.

set_key_enabled Method

Enables or disables a KMS key.

Syntax

def set_key_enabled(key_id: str, enabled: bool) -> None: ...

Remarks

This method enables or disables the KMS key specified by KeyId.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key in the current account and region.

This method will fail if any of the following are true regarding the specified KMS key:

• Its key_state is aksPendingDeletion (2) or aksPendingImport (3).
• It is an AWS-managed KMS key (see key_aws_managed).

set_key_rotation_status Method

Enables or disables automatic key rotation for a KMS key.

Syntax

def set_key_rotation_status(key_id: str, enabled: bool) -> None: ...

Remarks

This method enables or disables automatic key material rotation for the KMS key specified by KeyId.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key in the current account and region.

This method will fail if any of the following are true regarding the specified KMS key:

• Its key_state is anything other than aksEnabled (0).
• It is asymmetric (see key_key_spec).
• It has imported key material (see key_origin).
• It resides in a custom key store (see key_custom_key_store_id).
• It is an AWS-managed KMS key (see key_aws_managed).

sign Method

Signs a message using a KMS key.

Syntax

def sign(key_id: str, algorithm: str, is_digest: bool) -> None: ...

Remarks

This method signs a message using the KMS key specified by KeyId and the given Algorithm. The message data to sign is taken from the the specified input_file or the input_data property. The signature data is output to the the specified output_file or the output_data property.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key, or the name or ARN of an alias, in the current region. If an ARN is provided, it can be for a KMS key or alias in another account so long as the appropriate permissions are in place.

The Algorithm parameter specifies which algorithm to use to sign the data. Possible values are:

• RSASSA_PSS_SHA_256
• RSASSA_PSS_SHA_384
• RSASSA_PSS_SHA_512
• RSASSA_PKCS1_V1_5_SHA_256
• RSASSA_PKCS1_V1_5_SHA_384
• RSASSA_PKCS1_V1_5_SHA_512
• ECDSA_SHA_256
• ECDSA_SHA_384
• ECDSA_SHA_512

The IsDigest parameter specifies whether the message data is the original message (False) or a message digest (True). When supplying a message digest, keep in mind that the same digest will need to be provided in order to verify the signature later.

Note that a maximum of 4096 bytes of message data can be sent to the server. If IsDigest is False, and more than 4096 bytes of message data are provided, the class will automatically compute an appropriate message digest and send it instead. In such cases, the computed digest is made available via the MessageDigest configuration setting.

This method will fail if any of the following are true regarding the specified KMS key:

• Its key_state is anything other than aksEnabled (0).
• It is symmetric (see key_key_spec).
• It is for encryption/decryption instead of signing/verification (see key_for_signing).
• It is an AWS-managed KMS key (see key_aws_managed).

update_alias Method

Updates an alias to refer to a different KMS key.

Syntax

def update_alias(alias_name: str, new_key_id: str) -> None: ...

Remarks

This method updates the alias named AliasName, changing it so that it refers to the KMS key specified by NewKeyId.

The value passed for the AliasName parameter must include the alias/ prefix, and must be the name of an alias in the current account and region

The value passed for the NewKeyId parameter must be the Id or ARN of a KMS key in the current account and region. The specified KMS key must be of the same type (i.e., symmetric or asymmetric) and have the same usage (i.e., encryption/decryption or signing/verification) as the KMS key that the alias currently refers to.

This method will fail if the specified alias is AWS-managed (i.e., its name begins with alias/aws/). This method will also fail if the specified KMS key's state is aksPendingDeletion (2), or if it is AWS-managed (see key_aws_managed).

update_key_description Method

Updates a KMS key's description.

Syntax

def update_key_description(key_id: str, new_description: str) -> None: ...

Remarks

This method updates the description of the KMS key specified by KeyId.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key in the current account and region.

This method will fail if the specified KMS key's state is aksPendingDeletion (2), or if it is AWS-managed (see key_aws_managed).

verify Method

Verifies a digital signature using a KMS key.

Syntax

def verify(key_id: str, algorithm: str, is_digest: bool) -> bool: ...

Remarks

This method verifies a digital signature using the KMS key specified by KeyId and the given Algorithm. The message data is taken from the the specified input_file or the input_data property. The digital signature data is taken from the specified output_file or the output_data property. If the signature is successfully verified, this method returns True, otherwise it returns False.

The value passed for the KeyId parameter must be the Id or ARN of a KMS key, or the name or ARN of an alias, in the current region. If an ARN is provided, it can be for a KMS key or alias in another account so long as the appropriate permissions are in place.

The Algorithm parameter specifies which algorithm was used to sign the data. Possible values are:

• RSASSA_PSS_SHA_256
• RSASSA_PSS_SHA_384
• RSASSA_PSS_SHA_512
• RSASSA_PKCS1_V1_5_SHA_256
• RSASSA_PKCS1_V1_5_SHA_384
• RSASSA_PKCS1_V1_5_SHA_512
• ECDSA_SHA_256
• ECDSA_SHA_384
• ECDSA_SHA_512

The IsDigest parameter specifies whether the data whose signature is being verified is the original message (False) or a message digest (True). When a message digest is supplied, keep in mind that it must be the exact same digest that was used at signing time, regardless of whether it has been recomputed.

Note that, as with the sign method, a maximum of 4096 bytes of message data can be sent to the server. If IsDigest is False, and more than 4096 bytes of message data are provided, the class will automatically compute an appropriate message digest and send it instead. In such cases, the computed digest is made available via the MessageDigest configuration setting.

This method will fail if any of the following are true regarding the specified KMS key:

• Its key_state is anything other than aksEnabled (0).
• It is symmetric (see key_key_spec).
• It is for encryption/decryption instead of signing/verification (see key_for_signing).
• It is an AWS-managed KMS key (see key_aws_managed).

on_alias_list Event

Fires once for each alias when listing aliases.

Syntax

class AmazonKMSAliasListEventParams(object):
  @property
  def arn() -> str: ...

  @property
  def name() -> str: ...

  @property
  def key_id() -> str: ...

# In class AmazonKMS:
@property
def on_alias_list() -> Callable[[AmazonKMSAliasListEventParams], None]: ...
@on_alias_list.setter
def on_alias_list(event_hook: Callable[[AmazonKMSAliasListEventParams], None]) -> None: ...

Remarks

This event fires once for each alias returned when list_aliases is called.

ARN reflects the Amazon resource name of the alias.

Name reflects the name of the alias, including the alias/ prefix.

KeyId reflects the Id of the KMS key that the alias refers to.

on_end_transfer Event

This event fires when a document finishes transferring.

Syntax

class AmazonKMSEndTransferEventParams(object):
  @property
  def direction() -> int: ...

# In class AmazonKMS:
@property
def on_end_transfer() -> Callable[[AmazonKMSEndTransferEventParams], None]: ...
@on_end_transfer.setter
def on_end_transfer(event_hook: Callable[[AmazonKMSEndTransferEventParams], None]) -> None: ...

Remarks

The on_end_transfer event is fired when the document text finishes transferring from the server to the local host.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

on_error Event

Information about errors during data delivery.

Syntax

class AmazonKMSErrorEventParams(object):
  @property
  def error_code() -> int: ...

  @property
  def description() -> str: ...

# In class AmazonKMS:
@property
def on_error() -> Callable[[AmazonKMSErrorEventParams], None]: ...
@on_error.setter
def on_error(event_hook: Callable[[AmazonKMSErrorEventParams], None]) -> None: ...

Remarks

The on_error event is fired in case of exceptional conditions during message processing. Normally the class fails with an error.

The ErrorCode parameter contains an error code, and the Description parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

on_header Event

This event is fired every time a header line comes in.

Syntax

class AmazonKMSHeaderEventParams(object):
  @property
  def field() -> str: ...

  @property
  def value() -> str: ...

# In class AmazonKMS:
@property
def on_header() -> Callable[[AmazonKMSHeaderEventParams], None]: ...
@on_header.setter
def on_header(event_hook: Callable[[AmazonKMSHeaderEventParams], None]) -> None: ...

Remarks

The Field parameter contains the name of the HTTP header (which is the same as it is delivered). The Value parameter contains the header contents.

If the header line being retrieved is a continuation header line, then the Field parameter contains "" (empty string).

on_key_list Event

Fires once for each KMS key when listing KMS keys.

Syntax

class AmazonKMSKeyListEventParams(object):
  @property
  def arn() -> str: ...

  @property
  def id() -> str: ...

  @property
  def account_id() -> str: ...

  @property
  def description() -> str: ...

  @property
  def enabled() -> bool: ...

  @property
  def aws_managed() -> bool: ...

  @property
  def for_signing() -> bool: ...

  @property
  def key_spec() -> str: ...

  @property
  def algorithms() -> str: ...

  @property
  def state() -> int: ...

  @property
  def creation_date() -> str: ...

  @property
  def deletion_date() -> str: ...

# In class AmazonKMS:
@property
def on_key_list() -> Callable[[AmazonKMSKeyListEventParams], None]: ...
@on_key_list.setter
def on_key_list(event_hook: Callable[[AmazonKMSKeyListEventParams], None]) -> None: ...

Remarks

This event fires once for each KMS key returned when list_keys or get_key_info is called. However, note that only ARN and Id are populated when list_keys is called (unless the include_key_details property is enabled; refer to its documentation for more information).

ARN reflects the Amazon resource name of the KMS key.

Id reflects the Id of the KMS key.

AccountId reflects the Id of the AWS account that owns the KMS key.

Description reflects the KMS key's description.

Enabled reflects whether the KMS key is currently enabled.

AWSManaged reflects whether the KMS key is AWS-managed (True) or customer-managed (False).

ForSigning reflects whether the KMS key's usage is signing/verification (True) or encryption/decryption (False).

KeySpec reflects the key spec of the KMS key. For symmetric KMS keys, the only possible value is SYMMETRIC_DEFAULT which, according to the Amazon KMS documentation, is based on AES-256-GCM. For asymmetric KMS keys, possible values are:

• RSA_2048
• RSA_3072
• RSA_4096
• ECC_NIST_P256 (secp256r1)
• ECC_NIST_P384 (secp384r1)
• ECC_NIST_P521 (secp521r1)
• ECC_SECG_P256K1 (secp256k1)

Algorithms reflects a comma-separated list of algorithms that the KMS key supports. If key_for_signing is False, possible values are:

• SYMMETRIC_DEFAULT
• RSAES_OAEP_SHA_1
• RSAES_OAEP_SHA_256

If key_for_signing is True, possible values are:

• RSASSA_PSS_SHA_256
• RSASSA_PSS_SHA_384
• RSASSA_PSS_SHA_512
• RSASSA_PKCS1_V1_5_SHA_256
• RSASSA_PKCS1_V1_5_SHA_384
• RSASSA_PKCS1_V1_5_SHA_512
• ECDSA_SHA_256
• ECDSA_SHA_384
• ECDSA_SHA_512

State reflects the KMS key's state. Possible values are:

• aksEnabled (0): The KMS key is enabled and ready for use. (Also the default value used when list_keys is called.)
• aksDisabled (1): The KMS key is disabled and cannot be used until it is enabled again.
• aksPendingDeletion (2): The KMS key is pending deletion and cannot be used unless the deletion is canceled.
• aksPendingImport (3): The KMS key has been created, but external key material has not yet been imported into it, so it cannot be used.
• aksUnavailable (4): The KMS key is currently unavailable because the CloudHSM cluster that contains its key material has been disconnected from Amazon KMS.

CreationDate reflects the creation date of the KMS key, in seconds since the Unix epoch (including fractional seconds).

If the KMS key's state is aksPendingDeletion (2), DeletionDate reflects the deletion date, in seconds since the Unix epoch (including fractional seconds)

on_log Event

This event fires once for each log message.

Syntax

class AmazonKMSLogEventParams(object):
  @property
  def log_level() -> int: ...

  @property
  def message() -> str: ...

  @property
  def log_type() -> str: ...

# In class AmazonKMS:
@property
def on_log() -> Callable[[AmazonKMSLogEventParams], None]: ...
@on_log.setter
def on_log(event_hook: Callable[[AmazonKMSLogEventParams], None]) -> None: ...

Remarks

This event fires once for each log message generated by the class. The verbosity is controlled by the LogLevel setting.

LogLevel indicates the level of message. Possible values are as follows:

The value 1 (Info) logs basic information, including the URL, HTTP version, and status details.

The value 2 (Verbose) logs additional information about the request and response.

The value 3 (Debug) logs the headers and body for both the request and response, as well as additional debug information (if any).

Message is the log entry.

LogType identifies the type of log entry. Possible values are as follows:

• "Info"
• "RequestHeaders"
• "ResponseHeaders"
• "RequestBody"
• "ResponseBody"
• "ProxyRequest"
• "ProxyResponse"
• "FirewallRequest"
• "FirewallResponse"

on_ssl_server_authentication Event

Fired after the server presents its certificate to the client.

Syntax

class AmazonKMSSSLServerAuthenticationEventParams(object):
  @property
  def cert_encoded() -> bytes: ...

  @property
  def cert_subject() -> str: ...

  @property
  def cert_issuer() -> str: ...

  @property
  def status() -> str: ...

  @property
  def accept() -> bool: ...
  @accept.setter
  def accept(value) -> None: ...

# In class AmazonKMS:
@property
def on_ssl_server_authentication() -> Callable[[AmazonKMSSSLServerAuthenticationEventParams], None]: ...
@on_ssl_server_authentication.setter
def on_ssl_server_authentication(event_hook: Callable[[AmazonKMSSSLServerAuthenticationEventParams], None]) -> None: ...

Remarks

During this event, the client can decide whether or not to continue with the connection process. The Accept parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue.

When Accept is False, Status shows why the verification failed (otherwise, Status contains the string OK). If it is decided to continue, you can override and accept the certificate by setting the Accept parameter to True.

on_ssl_status Event

Shows the progress of the secure connection.

Syntax

class AmazonKMSSSLStatusEventParams(object):
  @property
  def message() -> str: ...

# In class AmazonKMS:
@property
def on_ssl_status() -> Callable[[AmazonKMSSSLStatusEventParams], None]: ...
@on_ssl_status.setter
def on_ssl_status(event_hook: Callable[[AmazonKMSSSLStatusEventParams], None]) -> None: ...

Remarks

The event is fired for informational and logging purposes only. This event tracks the progress of the connection.

on_start_transfer Event

This event fires when a document starts transferring (after the headers).

Syntax

class AmazonKMSStartTransferEventParams(object):
  @property
  def direction() -> int: ...

# In class AmazonKMS:
@property
def on_start_transfer() -> Callable[[AmazonKMSStartTransferEventParams], None]: ...
@on_start_transfer.setter
def on_start_transfer(event_hook: Callable[[AmazonKMSStartTransferEventParams], None]) -> None: ...

Remarks

The on_start_transfer event is fired when the document text starts transferring from the server to the local host.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

on_transfer Event

This event is fired while a document transfers (delivers document).

Syntax

class AmazonKMSTransferEventParams(object):
  @property
  def direction() -> int: ...

  @property
  def bytes_transferred() -> int: ...

  @property
  def percent_done() -> int: ...

  @property
  def text() -> bytes: ...

# In class AmazonKMS:
@property
def on_transfer() -> Callable[[AmazonKMSTransferEventParams], None]: ...
@on_transfer.setter
def on_transfer(event_hook: Callable[[AmazonKMSTransferEventParams], None]) -> None: ...

Remarks

The Text parameter contains the portion of the document text being received. It is empty if data are being posted to the server.

The BytesTransferred parameter contains the number of bytes transferred in this Direction since the beginning of the document text (excluding HTTP response headers).

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

The PercentDone parameter shows the progress of the transfer in the corresponding direction. If PercentDone can not be calculated the value will be -1.

Note: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance.

AmazonKMS Config Settings

AmazonKMS Config Settings

<firstlevel>
  <one>value</one>
  <two>
    <item>first</item>
    <item>second</item>
  </two>
  <three>value three</three>
</firstlevel>

{
  "firstlevel": {
    "one": "value",
    "two": ["first", "second"],
    "three": "value three"
  }
}

HTTP Config Settings

TCPClient Config Settings

SSL Config Settings

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

Socket Config Settings

Base Config Settings

AmazonKMS Errors

Common Errors

The class may also return one of the following error codes, which are inherited from other classes.

HTTP Errors

The class may also return one of the following error codes, which are inherited from other classes.

TCPClient Errors

SSL Errors

TCP/IP Errors