Works beautifully. Thanks very much Matt!
On Fri, Feb 16, 2018 at 11:49 AM, Matt Caswell <matt@xxxxxxxxxxx> wrote:
On 16/02/18 17:24, Gelareh Taban wrote:
> Hi all,
>
> I need to convert a Json Web Key (JWK) to PEM PKCS#8 format.
>
> I am using creating an RSA key using the parameters in JWK and then
> using i2d_RSAPublicKey() to encode the RSA key to PEM PKCS#1.
>
> Are there any OpenSSL functions that programmatically convert the key
> (both public and private) to PKCS#8?
You can use PEM_write_bio_PrivateKey() for this purpose. You need to
have your RSA key in EVP_PKEY format first. So something like
(simplified to remove error handling):
EVP_PKEY *key = EVP_PKEY_new();
EVP_PKEY_assign_RSA(key, rsa);
https://www.openssl.org/docs/man1.1.0/crypto/PEM_write_bio_ PrivateKey.html
https://www.openssl.org/docs/man1.1.0/crypto/EVP_PKEY_new. html
https://www.openssl.org/docs/man1.1.0/crypto/EVP_PKEY_ assign_RSA.html
Matt
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