AI_PKCS_OAEP_RSAPublicBER
152 RSA BSAFE Crypto-C Library Reference Manual
AI_PKCS_OAEP_RSAPublicBER
Purpose:
This AI is similar to AI_PKCS_OAEP_RSAPublic except that it uses the ASN.1 BER
format. This AI allows you to parse and create ASN.1 algorithm identifiers such as
those used in PKCS #7 and other protocols. You call
B_SetAlgorithmInfo to initialize
an algorithm object from the encoded algorithm identifier that includes the hash
function, mask generator function, and P source function. You call
B_GetAlgorithmInfo with this AI to create an encoded algorithm identifier from an
algorithm object that was created using
AI_PKCS_OAEP_RSAPublic or
AI_PKCS_OAEP_RSAPublicBER. The OID for the RSA OAEP encryption, excluding the
tag and length bytes, in decimal, is “
42, 134, 72, 134, 247, 13, 1, 1, 7”. The OID
for the mask function, excluding the tag and length bytes, in decimal, is “
42, 134,
72, 134, 247, 13, 1, 1, 8
”. The OID for the P source function, excluding the tag
and length bytes, in decimal, is “
42, 134, 72, 134, 247, 13, 1, 1, 9”. Also see
AI_PKCS_OAEP_RSAPublic.
Type of information this allows you to use:
the RSA algorithm for performing public-key encryption with OAEP message
padding as defined in PKCS #1 v2.0. When encrypting, this algorithm encodes the
data according to the definition of EME-OAEP-Encode as specified in PKCS #1 v2.0.
Format of info supplied to B_SetAlgorithmInfo:
pointer to an ITEM structure that gives the address and length of the BER-encoded
algorithm identifier. The encoding is converted to DER before it is copied to the
algorithm object.
B_SetAlgorithmInfo returns BE_WRONG_ALGORITHM_INFO if the
algorithm identifier specifies an algorithm other than RSAES-OAEP Encryption as
specified by PKCS #1 v2.0.
The general ASN.1 syntax for RSAES-OAEP is complicated. Here the simple DER
