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Certificate Fingerprint
Certificate Fingerprint

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!!! Overview
The [{$pagename}] is the [Certificate Signature] (or [fingerprint]) as is displayed as the Fingerprints section when looking at a [Certificate] with [Chrome] or [Firefox] and the [Thumbprint] in [Microsoft]'s [browsers] is the [hash] of the entire certificate in [DER] form.
%%information
[{$pagename}] is __NOT part of the [Certificate]__ but rather the [hash] of the [DER] [encoded|Encoding] [certificate]
%%
In [OpenSSL] the "-fingerprint" option takes the [hash] of the [DER] [encoded|Encoding] [certificate]. This is commonly called a "[fingerprint]". Because of the nature of [message-Digests] the fingerprint of a certificate is unique to that certificate and two certificates with the same [fingerprint] can be considered to be the same.
!! [Example] [{$pagename}]
[Certificate Fingerprint/certificate-fingerprint.png]\\
We see:
* [SHA-256]: 63 2B 11 99 44 40 17 DF 37 FC C3 DF 0F 3D 15 is the [SHA256] [hash] sum of [ASN.1] binary ([DER])
* [SHA-1]: 23 96 4A 13 68 93 9E DA E4 38 35 AC E3 2A 36 is the [SHA-1] [hash] sum of [ASN.1] binary ([DER])
[{$pagename}] are mostly used for identifying the [certificates] (for organising them)
!! Use of [{$pagename}]
One application of these [{$pagename}] is to validate [Extended Validation Certificate]. In this case, the [SHA-1] [{$pagename}] of the [root EV CA certificate|Trust Anchor] is hard-coded in the browser.
Note that the
* [{$pagename}] the fingerprint of the [Trust Anchor]
* [{$pagename}] has to match exactly the [Trust Anchors] shipped with the version of the [browser] compiled with those values.
!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
This page (revision-1) was last changed on 29-Nov-2024 16:16 by UnknownAuthorTop