X509Certificate fingerprint

Question

X509Certificate fingerprint

Opened this issue 6 months ago · 3 comments

StebeletskyiMyroslav commented 6 months ago

Hiow can i get formatted fingerprint of certificate ?

Foe example i have following certificate:

I try to use some online services that detect certificate fingerprint, and what i have with mentioned above certificate:
sha-1: eab12636cfe4526d0c2c3a615ac73fc0689e2d8d.

I'm just asking how can i do the same with @peculiar/x509 library.

Answer 1 · 2024-06-12T10:31:42.000Z

And yes, i know about getThumbprint method. It returns array of bytes.
But the problem occurs when i'm trying co convert this value to some hash similar value.
i'm just getting some strange symbols. It would be nice if you provide me an example how can i convert (decode) the result of getThumbprint method to hash string.

Answer 2 · 2024-06-12T12:23:32.000Z

If someone wondering how to do it, here is solution for browser environment:

const buf2hex = (buffer: ArrayBuffer): string => {
return [...new Uint8Array(buffer)]
.map(x => x.toString(16).padStart(2, '0'))
.join('');
}

Answer 3 · 2024-06-16T04:16:57.000Z

The solution from #34

const cert = new x509.X509Certificate(pem);
const thumbprint = await cert.getThumbprint();
const formattedThumbprint: string[] = [];
for (const octet of Buffer.from(thumbprint)) {
  formattedThumbprint.push(`${octet.toString(16)}`.padStart(2, "0").toUpperCase());
}
console.log(formattedThumbprint.join(":")); // 10:B9:24:B0:18:57:23:F2:2D:EB:FD:94:37:55:85:E9:CF:1D:8B:93