RSA Security 5 manual AIECPubKeyBER

AI_ECPubKeyBER

AI_ECPubKeyBER

Purpose:

This AI allows you to specify an EC public key and underlying EC parameters in order to build an acceleration table.

Type of information this allows you to use:

the encoding of an ANSI X9.62 Version 1 algorithm identifier that specifies an elliptic curve public key. An initialized AI_ECPubKeyBER or AI_ECPubKey algorithm object can be used as the input parameter ParameterInfoType when initializing an AI_ECBuildPubKeyAccelTable.

Format of info supplied to B_SetAlgorithmInfo:

pointer to an ITEM structure that contains the ANSI X9.62-compliant BER encoding of a public key and its elliptic curve parameters. In compliance with X9.62, you can specify the CHOICE of either a full EC CURVE definition or a NAMED CURVE definition. Both ANSI X9.62 uncompressed and hybrid base points are decoded.

The BER encoding can be obtained by calling B_GetKeyInfo from a key object of type KI_ECPublicBER.

The encoding is converted to DER before it is copied to the key object. B_SetKeyInfo returns BE_WRONG_KEY_INFO if the BER encoding is incorrect.

Format of info returned by B_GetAlgorithmInfo:

pointer to an ITEM structure that contains the address and length of the BER encoding.

Crypto-C procedures to use with algorithm object:

B_SetAlgorithmInfo and B_GetAlgorithmInfo.

Can get this info type if algorithm object already has:

AI_ECPubKey or AI_ECPubKeyBER.

8 4 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