This generate three files rds-combined-ca-bundle.pem.
I want to convert this file into ppk format.
For this I am using PUTTYGEN.
When i load rds-combined-ca-bundle.pem file then this gives me error
couldn't load private key (file does not begin with openssh key header)
PEM contains multiple lines of -----BEGIN CERTIFICATE----- and -----END CERTIFICATE-----
Example-
-----BEGIN CERTIFICATE----- MIID9DCCAtygAwIBAgIBQjANBgkqhkiG9w0BAQUFADCBijELMAkGA1UEBhMCVVMx EzARBgNVBAgMCldhc2hpbmd0b24xEDAOBgNVBAcMB1NlYXR0bGUxIjAgBgNVBAoM GUFtYXpvbiBXZWIgU2VydmljZXMsIEluYy4xEzARBgNVBAsMCkFtYXpvbiBSRFMx GzAZBgNVBAMMEkFtYXpvbiBSRFMgUm9vdCBDQTAeFw0xNTAyMDUwOTExMzFaFw0y MDAzMDUwOTExMzFaMIGKMQswCQYDVQQGEwJVUzETMBEGA1UECAwKV2FzaGluZ3Rv bjEQMA4GA1UEBwwHU2VhdHRsZTEiMCAGA1UECgwZQW1hem9uIFdlYiBTZXJ2aWNl cywgSW5jLjETMBEGA1UECwwKQW1hem9uIFJEUzEbMBkGA1UEAwwSQW1hem9uIFJE UyBSb290IENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuD8nrZ8V u+VA8yVlUipCZIKPTDcOILYpUe8Tct0YeQQr0uyl018StdBsa3CjBgvwpDRq1HgF Ji2N3+39+shCNspQeE6aYU+BHXhKhIIStt3r7gl/4NqYiDDMWKHxHq0nsGDFfArf AOcjZdJagOMqb3fF46flc8k2E7THTm9Sz4L7RY1WdABMuurpICLFE3oHcGdapOb9 T53pQR+xpHW9atkcf3pf7gbO0rlKVSIoUenBlZipUlp1VZl/OD/E+TtRhDDNdI2J P/DSMM3aEsq6ZQkfbz/Ilml+Lx3tJYXUDmp+ZjzMPLk/+3beT8EhrwtcG3VPpvwp BIOqsqVVTvw/CwIDAQABo2MwYTAOBgNVHQ8BAf8EBAMCAQYwDwYDVR0TAQH/BAUw AwEB/zAdBgNVHQ4EFgQUTgLurD72FchM7Sz1BcGPnIQISYMwHwYDVR0jBBgwFoAU TgLurD72FchM7Sz1BcGPnIQISYMwDQYJKoZIhvcNAQEFBQADggEBAHZcgIio8pAm MjHD5cl6wKjXxScXKtXygWH2BoDMYBJF9yfyKO2jEFxYKbHePpnXB1R04zJSWAw5 2EUuDI1pSBh9BA82/5PkuNlNeSTB3dXDD2PEPdzVWbSKvUB8ZdooV+2vngL0Zm4r 47QPyd18yPHrRIbtBtHR/6CwKevLZ394zgExqhnekYKIqqEX41xsUV0Gm6x4vpjf 2u6O/+YE2U+qyyxHE5Wd5oqde0oo9UUpFETJPVb6Q2cEeQib8PBAyi0i6KnF+kIV A9dY7IHSubtCK/i8wxMVqfd5GtbA8mmpeJFwnDvm9rBEsHybl08qlax9syEwsUYr /40NawZfTUU= -----END CERTIFICATE-----