X.509: Difference between revisions
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* http://en.wikipedia.org/wiki/X.509 | * http://en.wikipedia.org/wiki/X.509 | ||
* Internet X.509 Public Key Infrastructure Certificate and CRL Profile https://www.ietf.org/rfc/rfc2459.txt | |||
=Internal= | =Internal= | ||
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===X509 Subject Alternative Name=== | ===X509 Subject Alternative Name=== | ||
Used in the case of a [[Public_Key_Security#Certificates_Valid_for_Multiple_Hostnames|certificate valid for multiple hostnames]]. | |||
=Operations= | |||
Latest revision as of 01:30, 14 May 2022
External
- http://en.wikipedia.org/wiki/X.509
- Internet X.509 Public Key Infrastructure Certificate and CRL Profile https://www.ietf.org/rfc/rfc2459.txt
Internal
Overview
X.509 is a ITU-T standard for a public key infrastructure (PKI).
X.509 specifies, amongst other things, standard formats for public key certificates, certificate revocation lists, attribute certificates, and a certification path validation algorithm.
X.509 is a common certificate format that can be managed by JDK's keytool.
Certificate Structure
More details in section "Examining Certificates" of OpenSSL Cookbook.
This is a self-signed certificate:
Certificate:
Data:
Version: 3 (0x2)
Serial Number:
b9:f4:0a:47:fa:79:78:29
Signature Algorithm: sha256WithRSAEncryption
Issuer: C=US, L=Menlo Park, O=Nova Ordis LLC, CN=test.novaordis.com
Validity
Not Before: Apr 8 08:49:35 2018 GMT
Not After : Apr 8 08:49:35 2019 GMT
Subject: C=US, L=Menlo Park, O=Nova Ordis LLC, CN=test.novaordis.com
Subject Public Key Info:
Public Key Algorithm: rsaEncryption
Public-Key: (2048 bit)
Modulus:
00:ce:ab:8f:f6:2f:f1:4b:63:c6:ed:ea:8f:25:30:
[...]
Exponent: 65537 (0x10001)
X509v3 extensions:
X509v3 Subject Key Identifier:
B2:DA:94:80:CE:E8:61:DA:CA:15:85:97:A8:D8:A1:E4:37:A7:5A:9D
X509v3 Authority Key Identifier:
keyid:B2:DA:94:80:CE:E8:61:DA:CA:15:85:97:A8:D8:A1:E4:37:A7:5A:9D
X509v3 Basic Constraints:
CA:TRUE
Signature Algorithm: sha256WithRSAEncryption
3d:8f:9f:3b:8a:9a:39:36:d2:13:cb:85:de:d0:92:6e:36:1f:
[...]
Issuer
Validity - Not Before
Validity - Not After
Subject
X509 extensions
X509 Basic Constraints
CA
This field marks the certificate as belonging or not to a CA. A certificate that belongs to a CA gives it the ability to sign other certificate. Non-CA certificates will have this section omitted, or will have a "CA" value of FALSE.
X509 Subject Key Identifier
Establishes unique subject key identifier.
X509 Authority Key Identifier
Establishes unique authority key identifier.
X509 Subject Alternative Name
Used in the case of a certificate valid for multiple hostnames.