Cryptographic Token Interface Standard

PKCS#11

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SKIPJACK secret key objects

SKIPJACK secret key objects (object class CKO_SECRET_KEY, key type CKK_SKIPJACK) holds a single-length MEK or a TEK. The following table defines the SKIPJACK secret key object attributes, in addition to the common attributes listed in Table 15 , Table 19 , Table 25 , and Table 42 :

Table 56, SKIPJACK Secret Key Object

Attribute	Data type	Meaning
CKA_VALUE1,4,6,7	Byte array	Key value (always 12 bytes long)

SKIPJACK keys have 16 checksum bits, and these bits must be properly set. Attempting to create or unwrap a SKIPJACK key with incorrect checksum bits will return an error.

It is not clear that any tokens exist (or will ever exist) which permit an application to create a SKIPJACK key with a specified value. Nonetheless, we provide templates for doing so.

The following is a sample template for creating a SKIPJACK MEK secret key object:

CK_OBJECT_CLASS class = CKO_SECRET_KEY;
CK_KEY_TYPE keyType = CKK_SKIPJACK;
CK_UTF8CHAR label[] = "A SKIPJACK MEK secret key object";
CK_BYTE value[12] = {...};
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_ENCRYPT, &true, sizeof(true)},
{CKA_VALUE, value, sizeof(value)}
};

The following is a sample template for creating a SKIPJACK TEK secret key object:

CK_OBJECT_CLASS class = CKO_SECRET_KEY;
CK_KEY_TYPE keyType = CKK_SKIPJACK;
CK_UTF8CHAR label[] = "A SKIPJACK TEK secret key object";
CK_BYTE value[12] = {...};
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_ENCRYPT, &true, sizeof(true)},
{CKA_WRAP, &true, sizeof(true)},
{CKA_VALUE, value, sizeof(value)}
};

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RSA Security Inc. Public-Key Cryptography Standards - PKCS#11 - v211