EVP_PKEY_CMP - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL

NAMEEVP_PKEY_copy_parameters, EVP_PKEY_missing_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 *to, const EVP_PKEY *from); ​ ​ 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);

DESCRIPTIONThe function EVP_PKEY_missing_parameters() returns 1 if the public key parameters of pkey are missing and 0 if they are present or the algorithm doesn't use parameters. The function EVP_PKEY_copy_parameters() copies the parameters from key ​from to key to. An error is returned if the parameters are missing in ​from or present in both from and to and mismatch. If the parameters in from and to are both present and match this function has no effect. The function EVP_PKEY_cmp_parameters() compares the parameters of keys ​a and b. The function EVP_PKEY_cmp() compares the public key components and parameters (if present) of keys a and b.

NOTESThe 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 VALUESThe function EVP_PKEY_missing_parameters() returns 1 if the public key parameters of pkey are missing and 0 if they are present or the algorithm doesn't use parameters. These functions EVP_PKEY_copy_parameters() returns 1 for success and 0 for failure. The function 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 ALSOEVP_PKEY_CTX_new(3), ​EVP_PKEY_keygen(3)

COPYRIGHTCopyright 2006−2016 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the License). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.
0
Johanes Gumabo
Data Size   :   8,915 byte
man-EVP_PKEY_copy_parameters.3sslBuild   :   2024-12-05, 20:55   :  
Visitor Screen   :   x
Visitor Counter ( page / site )   :   3 / 183,114
Visitor ID   :     :  
Visitor IP   :   3.147.42.34   :  
Visitor Provider   :   AMAZON-02   :  
Provider Position ( lat x lon )   :   39.962500 x -83.006100   :   x
Provider Accuracy Radius ( km )   :   1000   :  
Provider City   :   Columbus   :  
Provider Province   :   Ohio ,   :   ,
Provider Country   :   United States   :  
Provider Continent   :   North America   :  
Visitor Recorder   :   Version   :  
Visitor Recorder   :   Library   :  
Online Linux Manual Page   :   Version   :   Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
Online Linux Manual Page   :   Library   :   lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page   :   Library   :   lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base   :   Version   :   Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base   :   Library   :   lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36

Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .
If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.

ERROR : Need New Coding :         (parse_manual_page_|249|E___VP_PKEY_cmp.3ssl|36/37|el══─{─══.|.el══─{─══. ds -- \|\(em\| )         (htmlprn|149|E___VP_PKEY_cmp.3ssl|36/37|.el══─{─══. ds --  —  |.el══─{─══. ds -- \|\(em\| )         (parse_manual_page_|249|E___VP_PKEY_cmp.3ssl|43|br══─}─══|'br══─}─══ )         (htmlprn|149|E___VP_PKEY_cmp.3ssl|43|'br══─}─══ |'br══─}─══ )