RSA Security 5 manual Aiecdsa

AI_EC_DSA

AI_EC_DSA

Purpose:

This AI allows you to perform raw ECDSA signature creation or verification operations. It does not compute a message digest before applying the signature operation. To compute a SHA1 message digest and create a signature of that digest, see AI_EC_DSAWithDigest.

Type of information this allows you to use:

the ECDSA signature algorithm used in raw ECDSA signature generation and verification, as defined in X9.62. Alternatively, to use an acceleration table in the generation or verification of a signature, use AI_ECBuildAcceleratorTable or AI_ECBuildPubKeyAccelTable. The public key-specific acceleration table accelerates verification only; for this operation, it provides greater acceleration than the AI_ECBuildAcceleratorTable at the cost of greater memory usage.

Format of info supplied to B_SetAlgorithmInfo:

NULL_PTR.

Format of info returned by B_GetAlgorithmInfo:

NULL_PTR.

Crypto-C procedures to use with algorithm object:

B_SignInit, B_SignUpdate, B_SignFinal, B_VerifyInit, B_VerifyUpdate, and

B_VerifyFinal. You must pass a random algorithm in B_SignFinal, but may pass (B_ALGORITHM_OBJ)NULL_PTR for all other randomAlgorithm arguments.

Algorithm methods to include in application's algorithm chooser:

For signature creation, AM_ECFP_DSA_SIGN for odd prime fields and

AM_ECF2POLY_DSA_SIGN for even characteristic. For signature verification,

AM_ECFP_DSA_VERIFY for odd prime fields and AM_ECF2POLY_DSA_VERIFY for even characteristic.

6 6 R S A B S A F E C r y p t o - C L i b r a r y R e f e r e n c e M a n u a l