# PKCS \#11 library attributes table for AWS CloudHSM Client SDK 3 The PKCS \#11 library table for AWS CloudHSM Client SDK 3 contains a list of attributes that differ by key types. It indicates whether a given attribute is supported for a particular key type when using a specific cryptographic function with AWS CloudHSM. **Legend:** + ✔ indicates that CloudHSM supports the attribute for the specific key type. + ✖ indicates that CloudHSM does not support the attribute for the specific key type. + R indicates that the attribute value is set to read-only for the specific key type. + S indicates that the attribute cannot be read by the `GetAttributeValue` as it is sensitive. + An empty cell in the Default Value column indicates that there is no specific default value assigned to the attribute. ## GenerateKeyPair

Attribute	Key Type				Default Value
	EC private	EC public	RSA private	RSA public
`CKA_CLASS`	✔	✔	✔	✔
`CKA_KEY_TYPE`	✔	✔	✔	✔
`CKA_LABEL`	✔	✔	✔	✔
`CKA_ID`	✔	✔	✔	✔
`CKA_LOCAL`	R	R	R	R	True
`CKA_TOKEN`	✔	✔	✔	✔	False
`CKA_PRIVATE`	✔1	✔1	✔1	✔1	True
`CKA_ENCRYPT`	✖	✔	✖	✔	False
`CKA_DECRYPT`	✔	✖	✔	✖	False
`CKA_DERIVE`	✔	✔	✔	✔	False
`CKA_MODIFIABLE`	✔1	✔1	✔1	✔1	True
`CKA_DESTROYABLE`	✔	✔	✔	✔	True
`CKA_SIGN`	✔	✖	✔	✖	False
`CKA_SIGN_RECOVER`	✖	✖	✔3	✖
`CKA_VERIFY`	✖	✔	✖	✔	False
`CKA_VERIFY_RECOVER`	✖	✖	✖	✔4
`CKA_WRAP`	✖	✔	✖	✔	False
`CKA_WRAP_TEMPLATE`	✖	✔	✖	✔
`CKA_TRUSTED`	✖	✔	✖	✔	False
`CKA_WRAP_WITH_TRUSTED`	✔	✖	✔	✖	False
`CKA_UNWRAP`	✔	✖	✔	✖	False
`CKA_UNWRAP_TEMPLATE`	✔	✖	✔	✖
`CKA_SENSITIVE`	✔	✖	✔	✖	True
`CKA_ALWAYS_SENSITIVE`	R	✖	R	✖
`CKA_EXTRACTABLE`	✔	✖	✔	✖	True
`CKA_NEVER_EXTRACTABLE`	R	✖	R	✖
`CKA_MODULUS`	✖	✖	✖	✖
`CKA_MODULUS_BITS`	✖	✖	✖	✔2
`CKA_PRIME_1`	✖	✖	✖	✖
`CKA_PRIME_2`	✖	✖	✖	✖
`CKA_COEFFICIENT`	✖	✖	✖	✖
`CKA_EXPONENT_1`	✖	✖	✖	✖
`CKA_EXPONENT_2`	✖	✖	✖	✖
`CKA_PRIVATE_EXPONENT`	✖	✖	✖	✖
`CKA_PUBLIC_EXPONENT`	✖	✖	✖	✔2
`CKA_EC_PARAMS`	✖	✔2	✖	✖
`CKA_EC_POINT`	✖	✖	✖	✖
`CKA_VALUE`	✖	✖	✖	✖
`CKA_VALUE_LEN`	✖	✖	✖	✖
`CKA_CHECK_VALUE`	R	R	R	R

## GenerateKey

Attribute	Key Type			Default Value
	AES	DES3	Generic Secret
`CKA_CLASS`	✔	✔	✔
`CKA_KEY_TYPE`	✔	✔	✔
`CKA_LABEL`	✔	✔	✔
`CKA_ID`	✔	✔	✔
`CKA_LOCAL`	R	R	R	True
`CKA_TOKEN`	✔	✔	✔	False
`CKA_PRIVATE`	✔1	✔1	✔1	True
`CKA_ENCRYPT`	✔	✔	✖	False
`CKA_DECRYPT`	✔	✔	✖	False
`CKA_DERIVE`	✔	✔	✔	False
`CKA_MODIFIABLE`	✔1	✔1	✔1	True
`CKA_DESTROYABLE`	✔	✔	✔	True
`CKA_SIGN`	✔	✔	✔	True
`CKA_SIGN_RECOVER`	✖	✖	✖
`CKA_VERIFY`	✔	✔	✔	True
`CKA_VERIFY_RECOVER`	✖	✖	✖
`CKA_WRAP`	✔	✔	✖	False
`CKA_WRAP_TEMPLATE`	✔	✔	✖
`CKA_TRUSTED`	✔	✔	✖	False
`CKA_WRAP_WITH_TRUSTED`	✔	✔	✔	False
`CKA_UNWRAP`	✔	✔	✖	False
`CKA_UNWRAP_TEMPLATE`	✔	✔	✖
`CKA_SENSITIVE`	✔	✔	✔	True
`CKA_ALWAYS_SENSITIVE`	✖	✖	✖
`CKA_EXTRACTABLE`	✔	✔	✔	True
`CKA_NEVER_EXTRACTABLE`	R	R	R
`CKA_MODULUS`	✖	✖	✖
`CKA_MODULUS_BITS`	✖	✖	✖
`CKA_PRIME_1`	✖	✖	✖
`CKA_PRIME_2`	✖	✖	✖
`CKA_COEFFICIENT`	✖	✖	✖
`CKA_EXPONENT_1`	✖	✖	✖
`CKA_EXPONENT_2`	✖	✖	✖
`CKA_PRIVATE_EXPONENT`	✖	✖	✖
`CKA_PUBLIC_EXPONENT`	✖	✖	✖
`CKA_EC_PARAMS`	✖	✖	✖
`CKA_EC_POINT`	✖	✖	✖
`CKA_VALUE`	✖	✖	✖
`CKA_VALUE_LEN`	✔2	✖	✔2
`CKA_CHECK_VALUE`	R	R	R

## CreateObject

Attribute	Key Type							Default Value
	EC private	EC public	RSA private	RSA public	AES	DES3	Generic Secret
`CKA_CLASS`	✔2	✔2	✔2	✔2	✔2	✔2	✔2
`CKA_KEY_TYPE`	✔2	✔2	✔2	✔2	✔2	✔2	✔2
`CKA_LABEL`	✔	✔	✔	✔	✔	✔	✔
`CKA_ID`	✔	✔	✔	✔	✔	✔	✔
`CKA_LOCAL`	R	R	R	R	R	R	R	False
`CKA_TOKEN`	✔	✔	✔	✔	✔	✔	✔	False
`CKA_PRIVATE`	✔1	✔1	✔1	✔1	✔1	✔1	✔1	True
`CKA_ENCRYPT`	✖	✖	✖	✔	✔	✔	✖	False
`CKA_DECRYPT`	✖	✖	✔	✖	✔	✔	✖	False
`CKA_DERIVE`	✔	✔	✔	✔	✔	✔	✔	False
`CKA_MODIFIABLE`	✔1	✔1	✔1	✔1	✔1	✔1	✔1	True
`CKA_DESTROYABLE`	✔	✔	✔	✔	✔	✔	✔	True
`CKA_SIGN`	✔	✖	✔	✖	✔	✔	✔	False
`CKA_SIGN_RECOVER`	✖	✖	✔3	✖	✖	✖	✖	False
`CKA_VERIFY`	✖	✔	✖	✔	✔	✔	✔	False
`CKA_VERIFY_RECOVER`	✖	✖	✖	✔4	✖	✖	✖
`CKA_WRAP`	✖	✖	✖	✔	✔	✔	✖	False
`CKA_WRAP_TEMPLATE`	✖	✔	✖	✔	✔	✔	✖
`CKA_TRUSTED`	✖	✔	✖	✔	✔	✔	✖	False
`CKA_WRAP_WITH_TRUSTED`	✔	✖	✔	✖	✔	✔	✔	False
`CKA_UNWRAP`	✖	✖	✔	✖	✔	✔	✖	False
`CKA_UNWRAP_TEMPLATE`	✔	✖	✔	✖	✔	✔	✖
`CKA_SENSITIVE`	✔	✖	✔	✖	✔	✔	✔	True
`CKA_ALWAYS_SENSITIVE`	R	✖	R	✖	R	R	R
`CKA_EXTRACTABLE`	✔	✖	✔	✖	✔	✔	✔	True
`CKA_NEVER_EXTRACTABLE`	R	✖	R	✖	R	R	R
`CKA_MODULUS`	✖	✖	✔2	✔2	✖	✖	✖
`CKA_MODULUS_BITS`	✖	✖	✖	✖	✖	✖	✖
`CKA_PRIME_1`	✖	✖	✔	✖	✖	✖	✖
`CKA_PRIME_2`	✖	✖	✔	✖	✖	✖	✖
`CKA_COEFFICIENT`	✖	✖	✔	✖	✖	✖	✖
`CKA_EXPONENT_1`	✖	✖	✔	✖	✖	✖	✖
`CKA_EXPONENT_2`	✖	✖	✔	✖	✖	✖	✖
`CKA_PRIVATE_EXPONENT`	✖	✖	✔2	✖	✖	✖	✖
`CKA_PUBLIC_EXPONENT`	✖	✖	✔2	✔2	✖	✖	✖
`CKA_EC_PARAMS`	✔2	✔2	✖	✖	✖	✖	✖
`CKA_EC_POINT`	✖	✔2	✖	✖	✖	✖	✖
`CKA_VALUE`	✔2	✖	✖	✖	✔2	✔2	✔2
`CKA_VALUE_LEN`	✖	✖	✖	✖	✖	✖	✖
`CKA_CHECK_VALUE`	R	R	R	R	R	R	R

## UnwrapKey

Attribute	Key Type					Default Value
	EC private	RSA private	AES	DES3	Generic Secret
`CKA_CLASS`	✔2	✔2	✔2	✔2	✔2
`CKA_KEY_TYPE`	✔2	✔2	✔2	✔2	✔2
`CKA_LABEL`	✔	✔	✔	✔	✔
`CKA_ID`	✔	✔	✔	✔	✔
`CKA_LOCAL`	R	R	R	R	R	False
`CKA_TOKEN`	✔	✔	✔	✔	✔	False
`CKA_PRIVATE`	✔1	✔1	✔1	✔1	✔1	True
`CKA_ENCRYPT`	✖	✖	✔	✔	✖	False
`CKA_DECRYPT`	✖	✔	✔	✔	✖	False
`CKA_DERIVE`	✔	✔	✔	✔	✔	False
`CKA_MODIFIABLE`	✔1	✔1	✔1	✔1	✔1	True
`CKA_DESTROYABLE`	✔	✔	✔	✔	✔	True
`CKA_SIGN`	✔	✔	✔	✔	✔	False
`CKA_SIGN_RECOVER`	✖	✔3	✖	✖	✖	False
`CKA_VERIFY`	✖	✖	✔	✔	✔	False
`CKA_VERIFY_RECOVER`	✖	✖	✖	✖	✖
`CKA_WRAP`	✖	✖	✔	✔	✖	False
`CKA_UNWRAP`	✖	✔	✔	✔	✖	False
`CKA_SENSITIVE`	✔	✔	✔	✔	✔	True
`CKA_EXTRACTABLE`	✔	✔	✔	✔	✔	True
`CKA_NEVER_EXTRACTABLE`	R	R	R	R	R
`CKA_ALWAYS_SENSITIVE`	R	R	R	R	R
`CKA_MODULUS`	✖	✖	✖	✖	✖
`CKA_MODULUS_BITS`	✖	✖	✖	✖	✖
`CKA_PRIME_1`	✖	✖	✖	✖	✖
`CKA_PRIME_2`	✖	✖	✖	✖	✖
`CKA_COEFFICIENT`	✖	✖	✖	✖	✖
`CKA_EXPONENT_1`	✖	✖	✖	✖	✖
`CKA_EXPONENT_2`	✖	✖	✖	✖	✖
`CKA_PRIVATE_EXPONENT`	✖	✖	✖	✖	✖
`CKA_PUBLIC_EXPONENT`	✖	✖	✖	✖	✖
`CKA_EC_PARAMS`	✖	✖	✖	✖	✖
`CKA_EC_POINT`	✖	✖	✖	✖	✖
`CKA_VALUE`	✖	✖	✖	✖	✖
`CKA_VALUE_LEN`	✖	✖	✖	✖	✖
`CKA_CHECK_VALUE`	R	R	R	R	R

## DeriveKey

Attribute	Key Type			Default Value
	AES	DES3	Generic Secret
`CKA_CLASS`	✔2	✔2	✔2
`CKA_KEY_TYPE`	✔2	✔2	✔2
`CKA_LABEL`	✔	✔	✔
`CKA_ID`	✔	✔	✔
`CKA_LOCAL`	R	R	R	True
`CKA_TOKEN`	✔	✔	✔	False
`CKA_PRIVATE`	✔1	✔1	✔1	True
`CKA_ENCRYPT`	✔	✔	✖	False
`CKA_DECRYPT`	✔	✔	✖	False
`CKA_DERIVE`	✔	✔	✔	False
`CKA_MODIFIABLE`	✔1	✔1	✔1	True
`CKA_DESTROYABLE`	✔1	✔1	✔1	True
`CKA_SIGN`	✔	✔	✔	False
`CKA_SIGN_RECOVER`	✖	✖	✖
`CKA_VERIFY`	✔	✔	✔	False
`CKA_VERIFY_RECOVER`	✖	✖	✖
`CKA_WRAP`	✔	✔	✖	False
`CKA_UNWRAP`	✔	✔	✖	False
`CKA_SENSITIVE`	✔	✔	✔	True
`CKA_EXTRACTABLE`	✔	✔	✔	True
`CKA_NEVER_EXTRACTABLE`	R	R	R
`CKA_ALWAYS_SENSITIVE`	R	R	R
`CKA_MODULUS`	✖	✖	✖
`CKA_MODULUS_BITS`	✖	✖	✖
`CKA_PRIME_1`	✖	✖	✖
`CKA_PRIME_2`	✖	✖	✖
`CKA_COEFFICIENT`	✖	✖	✖
`CKA_EXPONENT_1`	✖	✖	✖
`CKA_EXPONENT_2`	✖	✖	✖
`CKA_PRIVATE_EXPONENT`	✖	✖	✖
`CKA_PUBLIC_EXPONENT`	✖	✖	✖
`CKA_EC_PARAMS`	✖	✖	✖
`CKA_EC_POINT`	✖	✖	✖
`CKA_VALUE`	✖	✖	✖
`CKA_VALUE_LEN`	✔2	✖	✔2
`CKA_CHECK_VALUE`	R	R	R

## GetAttributeValue

Attribute	Key Type
	EC private	EC public	RSA private	RSA public	AES	DES3	Generic Secret
`CKA_CLASS`	✔	✔	✔	✔	✔	✔	✔
`CKA_KEY_TYPE`	✔	✔	✔	✔	✔	✔	✔
`CKA_LABEL`	✔	✔	✔	✔	✔	✔	✔
`CKA_ID`	✔	✔	✔	✔	✔	✔	✔
`CKA_LOCAL`	✔	✔	✔	✔	✔	✔	✔
`CKA_TOKEN`	✔	✔	✔	✔	✔	✔	✔
`CKA_PRIVATE`	✔1	✔1	✔1	✔1	✔1	✔1	✔1
`CKA_ENCRYPT`	✖	✖	✖	✔	✔	✔	✖
`CKA_DECRYPT`	✖	✖	✔	✖	✔	✔	✖
`CKA_DERIVE`	✔	✔	✔	✔	✔	✔	✔
`CKA_MODIFIABLE`	✔	✔	✔	✔	✔	✔	✔
`CKA_DESTROYABLE`	✔	✔	✔	✔	✔	✔	✔
`CKA_SIGN`	✔	✖	✔	✖	✔	✔	✔
`CKA_SIGN_RECOVER`	✖	✖	✔	✖	✖	✖	✖
`CKA_VERIFY`	✖	✔	✖	✔	✔	✔	✔
`CKA_VERIFY_RECOVER`	✖	✖	✖	✔	✖	✖	✖
`CKA_WRAP`	✖	✖	✖	✔	✔	✔	✖
`CKA_WRAP_TEMPLATE`	✖	✔	✖	✔	✔	✔	✖
`CKA_TRUSTED`	✖	✔	✖	✔	✔	✔	✔
`CKA_WRAP_WITH_TRUSTED`	✔	✖	✔	✖	✔	✔	✔
`CKA_UNWRAP`	✖	✖	✔	✖	✔	✔	✖
`CKA_UNWRAP_TEMPLATE`	✔	✖	✔	✖	✔	✔	✖
`CKA_SENSITIVE`	✔	✖	✔	✖	✔	✔	✔
`CKA_EXTRACTABLE`	✔	✖	✔	✖	✔	✔	✔
`CKA_NEVER_EXTRACTABLE`	✔	✖	✔	✖	✔	✔	✔
`CKA_ALWAYS_SENSITIVE`	R	R;	R	R	R	R	R
`CKA_MODULUS`	✖	✖	✔	✔	✖	✖	✖
`CKA_MODULUS_BITS`	✖	✖	✖	✔	✖	✖	✖
`CKA_PRIME_1`	✖	✖	S	✖	✖	✖	✖
`CKA_PRIME_2`	✖	✖	S	✖	✖	✖	✖
`CKA_COEFFICIENT`	✖	✖	S	✖	✖	✖	✖
`CKA_EXPONENT_1`	✖	✖	S	✖	✖	✖	✖
`CKA_EXPONENT_2`	✖	✖	S	✖	✖	✖	✖
`CKA_PRIVATE_EXPONENT`	✖	✖	S	✖	✖	✖	✖
`CKA_PUBLIC_EXPONENT`	✖	✖	✔	✔	✖	✖	✖
`CKA_EC_PARAMS`	✔	✔	✖	✖	✖	✖	✖
`CKA_EC_POINT`	✖	✔	✖	✖	✖	✖	✖
`CKA_VALUE`	S	✖	✖	✖	✔2	✔2	✔2
`CKA_VALUE_LEN`	✖	✖	✖	✖	✔	✖	✔
`CKA_CHECK_VALUE`	✔	✔	✔	✔	✔	✔	✖

**Attribute annotations** + [1] This attribute is partially supported by the firmware and must be explicitly set only to the default value. + [2] Mandatory attribute. + [3] **Client SDK 3 only**. The `CKA_SIGN_RECOVER` attribute is derived from the `CKA_SIGN` attribute. If being set, it can only be set to the same value that is set for `CKA_SIGN`. If not set, it derives the default value of `CKA_SIGN`. Since CloudHSM only supports RSA-based recoverable signature mechanisms, this attribute is currently applicable to RSA public keys only. + [4] **Client SDK 3 only**. The `CKA_VERIFY_RECOVER` attribute is derived from the `CKA_VERIFY` attribute. If being set, it can only be set to the same value that is set for `CKA_VERIFY`. If not set, it derives the default value of `CKA_VERIFY`. Since CloudHSM only supports RSA-based recoverable signature mechanisms, this attribute is currently applicable to RSA public keys only.