HP Open Source Security for OpenVMS Volume 2: HP SSL for OpenVMS > CRYPTO Application
Programming Interface (API) Reference
The PKCS#8 functions encode and decode private keys in PKCS#8 format using both PKCS#5 v1.5 and PKCS#5 v2.0 password based encryption algorithms.
Other than the use of DER as opposed to PEM these functions are identical to the corresponding PEM function as described in the pem(3) manual page.
Before using these functions OpenSSL_add_all_algorithms(3) should be called to initialize the internal algorithm lookup tables otherwise errors about unknown algorithms will occur if an attempt is made to decrypt a private key.
These functions are currently the only way to store encrypted private keys using DER format.
Currently all the functions use BIOs or FILE pointers, there are no functions which work directly on memory: this can be readily worked around by converting the buffers to memory BIOs, see BIO_s_mem(3) for details.