RSA Security 5 manual AIRSAKeyGen, Pointer to an Arsakeygenparams structure

AI_RSAKeyGen

AI_RSAKeyGen

Purpose:

This AI allows you to specify the parameters for generating an RSA public/private key pair as defined in PKCS #1. You may also use AI_RSAStrongKeyGen to generate RSA key pairs.

Type of information this allows you to use:

the parameters for generating an RSA public/private key pair as defined in PKCS #1, where the modulus size and public exponent are specified.

Format of info supplied to B_SetAlgorithmInfo:

pointer to an A_RSA_KEY_GEN_PARAMS structure:

typedef struct	{
unsigned int	modulusBits;	/* size of modulus in bits */
ITEM	publicExponent;	/* fixed public exponent */

} A_RSA_KEY_GEN_PARAMS;

The publicExponent 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_RSA_KEY_GEN_PARAMS structure (see above). All leading zeros have been stripped from the publicExponent integer.

Crypto-C procedures to use with algorithm object:

B_GenerateInit and B_GenerateKeypair. B_GenerateKeypair sets the publicKey key object with the KI_RSAPublic information and the privateKey key object with the KI_PKCS_RSAPrivate information. You must pass an initialized random algorithm to B_GenerateKeypair.

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