This feature is new in the Solaris Express 9/03 release.
IPsec uses the Solaris Cryptographic Framework instead of its own encryption and authentication modules. The modules are optimized for the SPARC platform. In addition, a new ipsecalgs command-line utility and APIs are provided to query the list of supported IPsec algorithms and other IPsec properties.
For further information, see the ipsecalgs(1M) man page.
In the System Administration Guide: IP Services, see Chapter 18, “IP Security Architecture (Overview)” and “Authentication and Encryption Algorithms in IPsec.”