Sortix nightly manual
This manual documents Sortix nightly, a development build that has not been officially released. You can instead view this document in the latest official manual.
EVP_PKEY_CMP(3) | Library Functions Manual | EVP_PKEY_CMP(3) |
NAME
EVP_PKEY_missing_parameters
,
EVP_PKEY_copy_parameters
,
EVP_PKEY_cmp_parameters
,
EVP_PKEY_cmp
—
public key parameter and comparison functions
SYNOPSIS
#include
<openssl/evp.h>
int
EVP_PKEY_missing_parameters
(const
EVP_PKEY *pkey);
int
EVP_PKEY_copy_parameters
(EVP_PKEY
*destination, const EVP_PKEY *source);
int
EVP_PKEY_cmp_parameters
(const
EVP_PKEY *a, const EVP_PKEY *b);
int
EVP_PKEY_cmp
(const
EVP_PKEY *a, const EVP_PKEY *b);
DESCRIPTION
EVP_PKEY_missing_parameters
() checks whether
any public key parameters are missing from
pkey.
EVP_PKEY_copy_parameters
() copies all public
key parameters from the source to the
destination. If the algorithm does not use
parameters, no action occurs.
EVP_PKEY_cmp_parameters
() compares the public
key parameters of a and
b. This is only supported for algorithms that
use parameters.
EVP_PKEY_cmp
() compares the public key
components of a and
b. If the algorithm uses public key
parameters, it also compares the parameters.
The main purpose of the functions
EVP_PKEY_missing_parameters
() and
EVP_PKEY_copy_parameters
() is to handle
public keys in certificates where the parameters are sometimes omitted from a
public key if they are inherited from the CA that signed it.
Since OpenSSL private keys contain public key components too, the function
EVP_PKEY_cmp
() can also be used to
determine if a private key matches a public key.
RETURN VALUES
EVP_PKEY_missing_parameters
() returns 1 if
the public key parameters of pkey are missing
or incomplete or 0 if they are present and complete or if the algorithm
doesn't use parameters.
EVP_PKEY_copy_parameters
() returns 1 for
success or 0 for failure. In particular, it fails if the key types mismatch or
if the public key parameters in the source
are missing or incomplete.
EVP_PKEY_cmp_parameters
() and
EVP_PKEY_cmp
() return 1 if the keys match,
0 if they don't match, -1 if the key types are different and -2 if the
operation is not supported.
SEE ALSO
EVP_PKEY_asn1_set_public(3), EVP_PKEY_CTX_new(3), EVP_PKEY_keygen(3), EVP_PKEY_new(3), X509_get_pubkey_parameters(3)HISTORY
EVP_PKEY_missing_parameters
() and
EVP_PKEY_copy_parameters
() first appeared
in SSLeay 0.8.0. EVP_PKEY_cmp_parameters
()
first appeared in SSLeay 0.9.0. These functions have been available since
OpenBSD 2.4.
EVP_PKEY_cmp
() first appeared in OpenSSL
0.9.8 and has been available since OpenBSD 4.5.October 19, 2021 | Debian |