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key_import.importX509.md

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Function: importX509

key/import.importX509

▸ importX509(x509, alg, options?): Promise<KeyLike>

Imports the SPKI from an X.509 string certificate as a runtime-specific public key representation (KeyObject or CryptoKey). See Algorithm Key Requirements to learn about key to algorithm requirements and mapping.

example ESM import

import { importX509 } from 'jose/key/import'

example CJS import

const { importX509 } = require('jose/key/import')

example Deno import

import { importX509 } from 'https://deno.land/x/jose@v3.20.1/key/import.ts'

example Usage

const algorithm = 'ES256'
const x509 = `-----BEGIN CERTIFICATE-----
MIIBXjCCAQSgAwIBAgIGAXvykuMKMAoGCCqGSM49BAMCMDYxNDAyBgNVBAMMK3Np
QXBNOXpBdk1VaXhXVWVGaGtjZXg1NjJRRzFyQUhXaV96UlFQTVpQaG8wHhcNMjEw
OTE3MDcwNTE3WhcNMjIwNzE0MDcwNTE3WjA2MTQwMgYDVQQDDCtzaUFwTTl6QXZN
VWl4V1VlRmhrY2V4NTYyUUcxckFIV2lfelJRUE1aUGhvMFkwEwYHKoZIzj0CAQYI
KoZIzj0DAQcDQgAE8PbPvCv5D5xBFHEZlBp/q5OEUymq7RIgWIi7tkl9aGSpYE35
UH+kBKDnphJO3odpPZ5gvgKs2nwRWcrDnUjYLDAKBggqhkjOPQQDAgNIADBFAiEA
1yyMTRe66MhEXID9+uVub7woMkNYd0LhSHwKSPMUUTkCIFQGsfm1ecXOpeGOufAh
v+A1QWZMuTWqYt+uh/YSRNDn
-----END CERTIFICATE-----`
const ecPublicKey = await importX509(x509, algorithm)

Parameters

Name Type Description
x509 string -
alg string JSON Web Algorithm identifier to be used with the imported key.
options? PEMImportOptions -

Returns

Promise<KeyLike>