Cryptographic Token Interface Standard

PKCS#11

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DSA domain parameter objects

DSA domain parameter objects (object class CKO_DOMAIN_PARAMETERS, key type CKK_DSA) hold DSA domain parameters. The following table defines the DSA domain parameter object attributes, in addition to the common attributes defined for this object class:

Table 50, DSA Domain Parameter Object Attributes

Attribute	Data type	Meaning
CKA_PRIME1,4	Big integer	Prime p (512 to 1024 bits, in steps of 64 bits)
CKA_SUBPRIME1,4	Big integer	Subprime q (160 bits)
CKA_BASE1,4	Big integer	Base g
CKA_PRIME_BITS2,3	CK_ULONG	Length of the prime value.

^- Refer to Table 15 for footnotes

The CKA_PRIME, CKA_SUBPRIME and CKA_BASE attribute values are collectively the "DSA domain parameters". See FIPS PUB 186-2 for more information on DSA domain parameters.

The following is a sample template for creating a DSA domain parameter object:

CK_OBJECT_CLASS class = CKO_DOMAIN_PARAMETERS;
CK_KEY_TYPE keyType = CKK_DSA;
CK_UTF8CHAR label[] = "A DSA domain parameter object";
CK_BYTE prime[] = {...};
CK_BYTE subprime[] = {...};
CK_BYTE base[] = {...};
CK_BBOOL true = CK_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_PRIME, prime, sizeof(prime)},
{CKA_SUBPRIME, subprime, sizeof(subprime)},
{CKA_BASE, base, sizeof(base)},
};

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RSA Security Inc. Public-Key Cryptography Standards - PKCS#11 - v220