docs/key/import/functions/importX509.md
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āø importX509(x509, alg, options?): Promise<CryptoKey>
Imports the SPKI from an X.509 string certificate as a CryptoKey.
[!NOTE]
The OID id-RSASSA-PSS (1.2.840.113549.1.1.10) is not supported in Web Cryptography API, use the OID rsaEncryption (1.2.840.113549.1.1.1) instead for all RSA algorithms.
This function is exported (as a named export) from the main 'jose' module entry point as well
as from its subpath export 'jose/key/import'.
| Parameter | Type | Description |
|---|---|---|
x509 | string | X.509 certificate string |
alg | string | JSON Web Algorithm identifier to be used with the imported key. See Algorithm Key Requirements. |
options? | KeyImportOptions | - |
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 jose.importX509(x509, algorithm)