An Object Identifier (OID) is a globally unique identifier. The Bouncy Castle Object Identifier is registered with iana (Internet Assigned Numbers Authority).
The prefix for the Legion of the Bouncy Castle is:
1.3.6.1.4.1.22554
Confirmation of this can be found at: http://www.iana.org/assignments/enterprise-numbers
BC pbe(1)
sha1(1)
pkcs12(2) aes(1) aes128-CBC(2)
1.3.6.1.4.1.22554.1.1.2.1.2
BC pbe(1)
sha1(1)
pkcs12(2) aes(1) aes192-CBC(22)
1.3.6.1.4.1.22554.1.1.2.1.22
BC pbe(1)
sha1(1)
pkcs12(2) aes(1) aes256-CBC(42)
1.3.6.1.4.1.22554.1.1.2.1.42
BC pbe(1)
sha2-family(2) sha256(1)
pkcs12(2) aes(1) aes128-CBC(2)
1.3.6.1.4.1.22554.1.2.1.2.1.2
BC pbe(1)
sha2-family(2) sha256(1)
pkcs12(2) aes(1) aes192-CBC(22)
1.3.6.1.4.1.22554.1.2.1.2.1.22
BC pbe(1)
sha2-family(2) sha256(1)
pkcs12(2) aes(1) aes256-CBC(42)
1.3.6.1.4.1.22554.1.2.1.2.1.42