ExportCertificate Method
Exports the currently selected certificate.
Syntax
Remarks
This method exports the certificate currently selected by Cert to the file specified by the CertFile parameter in the format specified by ExportFormat. This method may effectively be used to convert between a variety of formats.
The Password parameter specifies a password for the private key when ExportPrivateKey is set to True. Password is not applicable when ExportPrivateKey is set to False.
If CertFile is set to empty string the exported certificate will not be written to disk and instead will be held as a string by the ExportedCert property.
ExportFormat is applicable when ExportCertificate is called and may be used to specify the output format. The applicability of each format depends on whether ExportPrivateKey is set. Some formats are only applicable when exporting to a private key and some values are only applicable when exporting to a public key.
| ExportFormat | Applicability | Description |
| "PFX" or "PKCS12" (default) | Private Keys | A PFX file (PKCS12). |
| "PEM" | Public and Private Keys |
A PEM formatted public certificate (X509/PKCS1/PKCS8), or PEM formatted private key (PKCS1/PKCS8). When ExportPrivateKey is False the exported certificate will be a PEM formatted X509 public certificate if the certificate being exported includes X509 data. If no X509 information is present the public key will be exported in PKCS1 public key format for RSA/DSA keys and PKCS8 public key format for ECDSA/EdDSA keys. When ExportPrivateKey is True the exported certificate will be a PEM formatted PKCS1 private key for RSA/DSA keys and a PEM formatted PKCS8 proviate key for ECDSA/EdDSA keys. Example when ExportPrivateKey is False:
-----BEGIN CERTIFICATE----- MIIBkTCB+6ADAgECAgEBMA0GCSqGSIb3DQEBBQUAMA4xDDAKBgNVBAMTAzEwMDAgFw0wNzAx ... Pg49SpQ+HcUibIpum2O0hmnySH7BPGfXD8Lu -----END CERTIFICATE-----Example when ExportPrivateKey is True: -----BEGIN RSA PRIVATE KEY----- MIICWwIBAAKBgQD5/STHUd7YkN1JyoyYnUvCf+Fyx1+ZleBJxvwDcm3yaZ98bvry ... 91y8ydb3mQ9l1hZudo2sj8tHnvEgph0r7B8hMM6Qaw== -----END RSA PRIVATE KEY----- |
| "PKCS1" | Public and Private Keys | A PEM formatted PKCS1 key file.
Example when ExportPrivateKey is False:
-----BEGIN RSA PUBLIC KEY----- MIGJAoGBALAyxV5assz+9v7aHbj93NYN5uGB/1z7kb2Nx4hj02QyRYbcD4htkhK4Qcq2GCsG ... MxW4+pdeN4oEZ6rbMZt01bvMwNRX2GDEyQBhAgMBAAE= -----END RSA PUBLIC KEY-----Example when ExportPrivateKey is True: -----BEGIN RSA PRIVATE KEY----- MIICWwIBAAKBgQD5/STHUd7YkN1JyoyYnUvCf+Fyx1+ZleBJxvwDcm3yaZ98bvry ... 91y8ydb3mQ9l1hZudo2sj8tHnvEgph0r7B8hMM6Qaw== -----END RSA PRIVATE KEY----- |
| "PKCS8" | Public and Private Keys | A PEM formatted PKCS8 key file.
Example when ExportPrivateKey is False:
-----BEGIN PUBLIC KEY----- MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCxdTNtpJQbw90cq6aJEx5vRIBrAiCAB9/F ... 8UdUliXeU8UGYjVcMhGy5oPsVeBXGcPAqF2mjXdBKNnzlSlctOLnYRBS5jwRuNfTQQIDAQAB -----END PUBLIC KEY-----Example when ExportPrivateKey is True: -----BEGIN PRIVATE KEY----- MIICdQIBADANBgkqhkiG9w0BAQEFAASCAl8wggJbAgEAAoGBAPn9JMdR3tiQ3UnK ... HSvsHyEwzpBr -----END PRIVATE KEY----- |
| "OpenSSH" | Public and Private Keys | An OpenSSH public or private key file.
Example when ExportPrivateKey is False:
ssh-rsa AAAAB3NzaC1y...Example when ExportPrivateKey is True: -----BEGIN OPENSSH PRIVATE KEY----- b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAlwAAAAdzc2gtcnNh ... AwQFBgcICQo= -----END OPENSSH PRIVATE KEY----- |
| "PPK" | Private Keys | A PuTTY private key file.
Example:
PuTTY-User-Key-File-2: ssh-rsa Encryption: none Comment: rsa-key-20180822 Public-Lines: 4 AAAAB3NzaC1yc2EAAAADAQABAAAAgQCmz5j5kWUKxfwiv6J0LQ4wN9ekpeORXVaP ... 8pSSWejQ5Q== Private-Lines: 8 AAAAgH87Sp/YcSw1dKoAZuWb0/2dKkKwMRIYEkS15caRpzAteay6WWX7l1sgBTU7 ... Oa0= Private-MAC: d53e24f44bde8d1d3844a142fbb1fa7c88ea3585 |
| "SSH2PublicKey" | Public Keys | An SSH2 public key.
Example:
---- BEGIN SSH2 PUBLIC KEY ---- AAAAB3NzaC1yc2EAAAADAQABAAAAgQD5/STHUd7YkN1JyoyYnUvCf+Fyx1+ZleBJxvwDcm3y ... 6bVPTODELil1PVWJDlfdwoLZZKY2ACFHzxBqaOlYv1rbd2JIYAuqGca2ow== ---- END SSH2 PUBLIC KEY ---- |
| "SSH2PrivateKey" | Private Keys | An SSH2 private key.
Example:
---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ---- AAAAB3NzaC1yc2EAAAADAQABAAAAgQD5/STHUd7YkN1JyoyYnUvCf+Fyx1+ZleBJxvwDcm3y ... 6bVPTODELil1PVWJDlfdwoLZZKY2ACFHzxBqaOlYv1rbd2JIYAuqGca2ow== ---- END SSH2 ENCRYPTED PRIVATE KEY ---- |
| "JWK" | Private and Public Keys | A JSON Web Key (JWK).
Example when ExportPrivateKey is False:
{
"kty": "EC",
"crv": "P-256",
"x": "M_P_uqzP43FYW-kXWlpEDlX3nPZUr1QaMllAxUnao7w",
"y": "zRFhp7iCXYIoTgerQ4LjGPTujodlimrwIMk-3enj_1Q"
}
Example when ExportPrivateKey is True:
{
"kty": "EC",
"crv": "P-256",
"x": "M_P_uqzP43FYW-kXWlpEDlX3nPZUr1QaMllAxUnao7w",
"y": "zRFhp7iCXYIoTgerQ4LjGPTujodlimrwIMk-3enj_1Q",
"d": "eFBtl-uaB9Y4b-CIav5IYX4gGRFBvpBmrMOOQ7L-euI"
}
|
| "XML" | Private and Public Keys | An XML file holding the key or X509 data.
Example when ExportPrivateKey is False:
<X509Data> <X509Certificate>MIIB...D8Lu</X509Certificate> </X509Data>Example when ExportPrivateKey is True: <RSAKeyValue> <Modulus>+f0k...tqM=</Modulus> <Exponent>AQAB</Exponent> <P>/cOnF...tGw==</P> <Q>/DD5...dGQ==</Q> <DP>d75...N0w==</DP> <DQ>Cyv...rKQ==</DQ> <InverseQ>fsB...Qaw==</InverseQ> <D>J7p...YJE=</D> </RSAKeyValue> |
ExportCertificate Example:
//Convert from PFX to PPK
certmgr.Cert = new Certificate(CertStoreTypes.cstPFXFile, "..\\test.pfx", "password", "*");
certmgr.ExportPrivateKey = true;
certmgr.ExportFormat = "PPK";
certmgr.ExportCertificate("..\\test.ppk", "newpassword");
//Export public certificate from PFX
certmgr.Cert = new Certificate(CertStoreTypes.cstPFXFile, "..\\test.pfx", "password", "*");
certmgr.ExportPrivateKey = false;
certmgr.ExportFormat = "PEM";
certmgr.ExportCertificate("..\\exported.cer", "");
//Convert .cer file to SSH2 Public Key
certmgr.Cert = new Certificate("..\\exported.cer");
certmgr.ExportPrivateKey = false;
certmgr.ExportFormat = "SSH2PublicKey";
certmgr.ExportCertificate("..\\ssh2.pub", "");