Chapter 2 Algorithm Info Types 163
AI_PKCS_OAEPRecodeBER -- The identifier says that the algorithm by which the P
-- string for RSAES-OAEP is generated is by setting it
-- equal to the contents of the OCTET STRING which is
-- the parameter for this AlgorithmIdentifier.
-- The DER for this in hexadecimal is:
-- 06 09
-- 2A 86 48 86 F7 0D 01 01 09
--
id-pSpecified OBJECT IDENTIFIER ::= {
iso(1) member-body(2) us(840) rsadsi(113549)
pkcs(1) pkcs-1(1) pSpecified(9)}
-- Identifier for the SHA1 digest function.
-- The DER for this in hexadecimal is:
-- 06 05
-- 2B 0E 03 02 1A
--
id-sha1 OBJECT IDENTIFIER ::= {
iso(1) identified-organization(3) oiw(14) secsig(3)
algorithms(2) sha1(26) }
-- Syntax of AlgorithmIdentifier.parameters for RSAES-OAEP.
-- Note that the tags in this Sequence are explicit.
-- The DER encoding of DEFAULT values is to omit them.
--
RSAES-OAEP-params ::= SEQUENCE {
hashFunc [0] AlgorithmIdentifier {
{oaepDigestAlgorithms} }
DEFAULT sha1Identifier,
maskGenFunc [1] AlgorithmIdentifier {
{pkcs1MGFAlgorithms} }
DEFAULT mgf1SHA1Identifier,
pSourceFunc [2] AlgorithmIdentifier {
{pkcs1PGenAlgorithms} }
DEFAULT pSpecifiedEmptyIdentifier
}
-- Algorithm Identifier for SHA1, which is the OAEP default.
--
sha1Identifier ::= AlgorithmIdentifier {
id-sha1, NULL }
-- Default AlgorithmIdentifier for id-RSAES-OAEP.maskGenFunc.
--