RSA Security 5 manual AIDSAKeyGen, Pointer to an Adsaparams structure

B_GenerateKeypair

5 2

KI_DSAPrivate

AI_DSAParamGen

AI_DSAKeyGen

AI_DSAKeyGen

Purpose:

This AI allows you to generate a DSA key pair. First, you pass the system parameters to B_SetAlgorithmInfo. Then you generate the keys by calling B_GenerateInit and B_GenerateKeypair. Alternatively, you may use the AI_DSAParamGen algorithm type to generate the system parameters needed in DSA key generation. Also see

.

Type of information this allows you to use:

the parameters for generating a compatible DSA key pair as defined in FIPS PUB 186.

Format of info supplied to B_SetAlgorithmInfo:

pointer to an A_DSA_PARAMS structure:

typedef struct {
ITEM prime;	/* the prime	p */
ITEM subPrime;	/* the subprime q */
ITEM base;	/* the base	g */
} A_DSA_PARAMS;

An ITEM supplies an integer in canonical format, where the ITEM’s data points to an unsigned byte array -- most significant byte first -- and the ITEM’s len gives its length. All leading zeros are stripped from the integer before it is copied to the algorithm object.

Format of info returned by B_GetAlgorithmInfo:

pointer to an A_DSA_PARAMS structure (see above).

Crypto-C procedures to use with algorithm object:

B_GenerateInit and B_GenerateKeypair. B_GenerateKeypair sets the publicKey key object with the KI_DSAPublic information and the privateKey key object with the

information. You must pass an initialized random algorithm to

.

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