ObtainPrivateKeyFromPublicKey(3)ObtainPrivateKeyFromPublicKey(3)NAME
ObtainPrivateKeyFromPublicKey, CSSM_CSP_ObtainPrivateKeyFromPublicKey,
CSP_ObtainPrivateKeyFromPublicKey - Convert public key to private key
(CDSA)
SYNOPSIS
# include <cdsa/cssm.h>
API: CSSM_RETURN CSSMAPI CSSM_CSP_ObtainPrivateKeyFromPublicKey
(CSSM_CSP_HANDLE CSPHandle const CSSM_KEY *PublicKey, CSSM_KEY_PTR Pri‐
vateKey) SPI: CSSM_RETURN CSSMCSPI CSP_ObtainPrivateKeyFromPublicKey
(CSSM_CSP_HANDLE CSPHandle, const CSSM_KEY *PublicKey, CSSM_KEY_PTR
PrivateKey)
LIBRARY
Common Security Services Manager library (libcssm.so)
PARAMETERS
The handle that describes the module to perform this operation. The
public key corresponding to the private key being sought. A reference
to the private key corresponding to the public key.
DESCRIPTION
Given a public key this function returns a reference to the private
key. The private key and its associated passphrase can be used as an
input to any function requiring a private key value.
NOTES
The KeyData field of the CSSM_KEY structure is allocated by the CSP.
The application is required to free this memory using the
CSSM_FreeKey() (CSSM API), or CSP_FreeKey() (CSP SPI), function or with
the memory functions registered for the CSPHandle.
RETURN VALUE
A CSSM_RETURN value indicating success or specifying a particular error
condition. The value CSSM_OK indicates success. All other values repre‐
sent an error condition.
ERRORS
Errors are described in the CDSA technical standard. See
CDSA_intro(3). CSSMERR_CSP_PRIVATE_KEY_NOT_FOUND
SEE ALSO
Books
Intel CDSA Application Developer's Guide (see CDSA_intro(3))
Reference Pages
ObtainPrivateKeyFromPublicKey(3)
