OCSP_REQUEST_ADD1_NONCE - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMEOCSP_request_add1_nonce, OCSP_basic_add1_nonce, OCSP_check_nonce, OCSP_copy_nonce − OCSP nonce functions
SYNOPSIS​ #include <openssl/ocsp.h> ​ ​ int OCSP_request_add1_nonce(OCSP_REQUEST *req, unsigned char *val, int len); ​ int OCSP_basic_add1_nonce(OCSP_BASICRESP *resp, unsigned char *val, int len); ​ int OCSP_copy_nonce(OCSP_BASICRESP *resp, OCSP_REQUEST *req); ​ int OCSP_check_nonce(OCSP_REQUEST *req, OCSP_BASICRESP *resp);
DESCRIPTION​OCSP_request_add1_nonce() adds a nonce of value val and length len to ​OCSP request req. If val is NULL a random nonce is used. If len is zero or negative a default length will be used (currently 16 bytes). ​OCSP_basic_add1_nonce() is identical to OCSP_request_add1_nonce() except it adds a nonce to OCSP basic response resp. ​OCSP_check_nonce() compares the nonce value in req and resp. ​OCSP_copy_nonce() copies any nonce value present in req to resp.
RETURN VALUES​OCSP_request_add1_nonce() and OCSP_basic_add1_nonce() return 1 for success and 0 for failure. ​OCSP_copy_nonce() returns 1 if a nonce was successfully copied, 2 if no nonce was present in req and 0 if an error occurred. ​OCSP_check_nonce() returns the result of the nonce comparison between req and resp. The return value indicates the result of the comparison. If nonces are present and equal 1 is returned. If the nonces are absent 2 is returned. If a nonce is present in the response only 3 is returned. If nonces are present and unequal 0 is returned. If the nonce is present in the request only then −1 is returned.
NOTESFor most purposes the nonce value in a request is set to a random value so the val parameter in OCSP_request_add1_nonce() is usually NULL. An OCSP nonce is typically added to an OCSP request to thwart replay attacks by checking the same nonce value appears in the response. Some responders may include a nonce in all responses even if one is not supplied. Some responders cache OCSP responses and do not sign each response for performance reasons. As a result they do not support nonces. The return values of OCSP_check_nonce() can be checked to cover each case. A positive return value effectively indicates success: nonces are both present and match, both absent or present in the response only. A nonzero return additionally covers the case where the nonce is present in the request only: this will happen if the responder doesn't support nonces. A zero return value indicates present and mismatched nonces: this should be treated as an error condition.
SEE ALSO​crypto (7), ​OCSP_cert_to_id (3), ​OCSP_REQUEST_new (3), ​OCSP_resp_find_status (3), ​OCSP_response_status (3), ​OCSP_sendreq_new (3)
COPYRIGHTCopyright 2015−2020 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   :   10,849 byte
man-OCSP_copy_nonce.3sslBuild   :   2024-12-05, 20:55   :  
Visitor Screen   :   x
Visitor Counter ( page / site )   :   4 / 171,550
Visitor ID   :     :  
Visitor IP   :   3.138.105.128   :  
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|O___CSP_basic_add1_nonce.3ssl|36/37|el══─{─══.|.el══─{─══. ds -- \|\(em\| )         (htmlprn|149|O___CSP_basic_add1_nonce.3ssl|36/37|.el══─{─══. ds --  —  |.el══─{─══. ds -- \|\(em\| )         (parse_manual_page_|249|O___CSP_basic_add1_nonce.3ssl|43|br══─}─══|'br══─}─══ )         (htmlprn|149|O___CSP_basic_add1_nonce.3ssl|43|'br══─}─══ |'br══─}─══ )