Chapter 2 Algorithm Info Types 155
AI_PKCS_OAEP_RSAPublicBER
Format of info supplied to B_GetAlgorithmInfo:
pointer to an ITEM structure that gives the address and length of the DER-encoded
algorithm identifier.
Crypto-C procedures to use with algorithm object:
B_EncryptInit, B_EncryptUpdate, and B_EncryptFinal.
B_EncryptFinal requires a valid random number generator as a B_ALGORITHM_OBJ in
its
randomAlgorithm
argument. PKCS #1 v2.0 does not specify the random number
generation method. It is recommended that
AI_X962Random_V0 or AI_SHA1Random be
initialized with enough seed bytes to produce 160 bits of entropy.
You may pass (
B_ALGORITHM_OBJ)NULL_PTR for the
randomAlgorithm
argument in
B_EncryptUpdate.
Algorithm methods to include in application's algorithm chooser:
AM_RSA_ENCRYPT.
AM_SHA is required for the default
pSource
digest function and also for the default MGF
underlying digest method.
Key info types for keyObject in B_EncryptInit or B_DecryptInit:
KI_RSAPublic and KI_RSAPublicBER may be used to perform RSA encryption or
decryption.
Compatible representation:
AI_PKCS_OAEP_RSAPublic.
mgf1SHA1Identifier ::= AlgorithmIdentifier {
id-mgf1, sha1Identifier }
-- This identifier means that P is an empty string, so the digest
-- of the empty string appears in the RSA block before masking.
--
pSpecifiedEmptyIdentifier ::= AlgorithmIdentifier {
id-pSpecified, OCTET STRING SIZE (0)
}
