Cryptographic Token Interface Standard

PKCS#11

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KEA private key objects

KEA private key objects (object class CKO_PRIVATE_KEY, key type CKK_KEA) hold KEA private keys. The following table defines the KEA private key object attributes, in addition to the common attributes listed in Table 14 , Table 18 , Table 24 , and Table 32 :

Table 38, KEA Private Key Object Attributes

Attribute	Data type	Meaning
CKA_PRIME1,4,6	Big integer	Prime p (512 to 1024 bits, in steps of 64 bits)
CKA_SUBPRIME1,4,6	Big integer	Subprime q (160 bits)
CKA_BASE1,4,6	Big integer	Base g (512 to 1024 bits, in steps of 64 bits)
CKA_VALUE1,4,6,7	Big integer	Private value x

The CKA_PRIME, CKA_SUBPRIME and CKA_BASE attribute values are collectively the "KEA parameters".

Note that when generating a KEA private key, the KEA parameters are not specified in the key's template. This is because KEA private keys are only generated as part of a KEA key pair, and the KEA parameters for the pair are specified in the template for the KEA public key.

The following is a sample template for creating a KEA private key object:

CK_OBJECT_CLASS class = CKO_PRIVATE_KEY;
CK_KEY_TYPE keyType = CKK_KEA;
CK_UTF8CHAR label[] = "A KEA private key object";
CK_BYTE subject[] = {...};
CK_BYTE id[] = {123};
CK_BYTE prime[] = {...};
CK_BYTE subprime[] = {...};
CK_BYTE base[] = {...};
CK_BYTE value[] = {...};
CK_BBOOL true = TRUE;
CK_ATTRIBUTE template[] = {
{CKA_CLASS, &class, sizeof(class)},
{CKA_KEY_TYPE, &keyType, sizeof(keyType)},
{CKA_TOKEN, &true, sizeof(true)},
{CKA_LABEL, label, sizeof(label)-1},
{CKA_SUBJECT, subject, sizeof(subject)},
{CKA_ID, id, sizeof(id)},
{CKA_SENSITIVE, &true, sizeof(true)},
{CKA_DERIVE, &true, sizeof(true)},
{CKA_PRIME, prime, sizeof(prime)},
{CKA_SUBPRIME, subprime, sizeof(subprime)},
{CKA_BASE, base, sizeof(base)},
{CKA_VALUE, value, sizeof(value)}
};

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RSA Security Inc. Public-Key Cryptography Standards - PKCS#11 - v210