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Chapter 2 Algorithm Info Types 111
AI_MD2WithRC2_CBCPadBER
AI_MD2WithRC2_CBCPadBER
Purpose:
This AI is similar to AI_MD2WithRC2_CBCPad except that it uses the ASN.1 BER format.
This AI allows you to parse and create ASN.1 algorithm identifiers such as used in
PKCS #7 and other protocols. You call
B_SetAlgorithmInfo to initialize an algorithm
object from the encoded algorithm identifier that includes the effective key size, salt
and iteration count. You call
B_GetAlgorithmInfo with this AI to create an encoded
algorithm identifier from an algorithm object that was created using
AI_MD2WithRC2_CBCPad or AI_MD2WithRC2_CBCPadBER. The OID for this algorithm,
excluding the tag and length bytes, in decimal, is “
42, 134, 72, 134, 247, 13, 1,
5, 4
”. Also see AI_MD2WithRC2_CBCPad.
Type of information this allows you to use:
the encoding of an algorithm identifier that specifies the MD2 With RC2-CBC
password-based encryption algorithm, as defined by RSA Security Inc.
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 MD2 With RC2-CBC.
Format of info returned by 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, B_EncryptFinal, B_DecryptInit,
B_DecryptUpdate, and B_DecryptFinal. You may pass (B_ALGORITHM_OBJ)NULL_PTR
for all
randomAlgorithm
arguments.
Algorithm methods to include in application’s algorithm chooser:
AM_MD2 and AM_RC2_CBC_ENCRYPT for encryption or AM_RC2_CBC_DECRYPT for