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= | ||
* [[Public Key Security]] | * [[Public_Key_Security#X.509|Public Key Security]] | ||
=Overview= | =Overview= | ||
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=Certificate Structure= | =Certificate Structure= | ||
<font color=darkgray>More details in section "Examining Certificates" of OpenSSL Cookbook.</font> | |||
This is a [[Public_Key_Security#Self-Signed_Certificate|self-signed certificate]]: | |||
Certificate: | Certificate: | ||
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b9:f4:0a:47:fa:79:78:29 | b9:f4:0a:47:fa:79:78:29 | ||
Signature Algorithm: sha256WithRSAEncryption | Signature Algorithm: sha256WithRSAEncryption | ||
Issuer: C=US, L=Menlo Park, O=Nova Ordis LLC, CN= | [[#Issuer|Issuer]]: C=US, L=Menlo Park, O=Nova Ordis LLC, CN=test.novaordis.com | ||
Validity | Validity | ||
Not Before: Apr 8 08:49:35 2018 GMT | [[#Validity_-_Not_Before|Not Before]]: Apr 8 08:49:35 2018 GMT | ||
Not After : Apr 8 08:49:35 2019 GMT | [[#Validity_-_Not_After|Not After]] : Apr 8 08:49:35 2019 GMT | ||
Subject: C=US, L=Menlo Park, O=Nova Ordis LLC, CN= | [[#Subject|Subject]]: C=US, L=Menlo Park, O=Nova Ordis LLC, CN=test.novaordis.com | ||
Subject Public Key Info: | Subject Public Key Info: | ||
Public Key Algorithm: rsaEncryption | Public Key Algorithm: rsaEncryption | ||
| Line 36: | Line 41: | ||
Exponent: 65537 (0x10001) | Exponent: 65537 (0x10001) | ||
X509v3 extensions: | X509v3 extensions: | ||
X509v3 Subject Key Identifier: | [[#X509_Subject_Key_Identifier|X509v3 Subject Key Identifier]]: | ||
B2:DA:94:80:CE:E8:61:DA:CA:15:85:97:A8:D8:A1:E4:37:A7:5A:9D | B2:DA:94:80:CE:E8:61:DA:CA:15:85:97:A8:D8:A1:E4:37:A7:5A:9D | ||
X509v3 Authority Key Identifier: | [[#X509_Authority_Key_Identifier|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 | keyid:B2:DA:94:80:CE:E8:61:DA:CA:15:85:97:A8:D8:A1:E4:37:A7:5A:9D | ||
X509v3 Basic Constraints: | [[#X509_Basic_Constraints|X509v3 Basic Constraints]]: | ||
CA:TRUE | [[#CA|CA]]:TRUE | ||
Signature Algorithm: sha256WithRSAEncryption | Signature Algorithm: sha256WithRSAEncryption | ||
3d:8f:9f:3b:8a:9a:39:36:d2:13:cb:85:de:d0:92:6e:36:1f: | 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 [[Public_Key_Security#Certificate_Authority_.28CA.29|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 [[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.