我有公共证书，其中包含用于加密数据的 2048 位 RSA 公钥。我需要使用 openssl 来提取此公钥。证书是 PEM .cer 文件，提取的密钥也应该是 PEM。
我使用命令提取公钥
openssl x509 -pubkey -noout -in cert.cer > pubkey.pem
输出为：
-----开始公钥----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAr5qMxLWtgkId2oRUfnPf 6MX+UouBQKOzyfG0J9LW9yya8Nr+ilPTSPp+hSBL/TD1ijUZ2RClyegnrojOKHS7 kp1ZFDQJwmKSW660NKeLbyu2fbcJFBuDmSVK8XwRsUaIpf4eixqx5wAZg8q64kJ9 R9e07WPqrC2+8p2F/7zlKsZ263CWZ/xE0M6I4RiKSA24iaiGVrppnIrX1oX2v/dq UNaQL3uIgH1WWtf4apnDA7MVei2Iz2NjFzLJ569wxzO92XBUrcEkqA7Xx0or6xij h0oFKxsygNqHzK3qf56McRi/xy1VFrGQsiZL1u4+cdIAu5/tWaecLFl0UOBBbYxz 9QIDAQAB -----结束公钥-----
我尝试使用 PKCS#1 填充和 AN1 编码将其转换为 RSA 公钥
openssl x509 -inform PEM -in cert.cer -outform PEM -pubkey -nocert -out pubkeyRSA.pem
输出是
-----开始 RSA 公钥----- MIIBCgKCAQEAr5qMxLWtgkId2oRUfnPf6MX+UouBQKOzyfG0J9LW9yya8Nr+ilPT SPp+hSBL/TD1ijUZ2RClyegnrojOKHS7kp1ZFDQJwmKSW660NKeLbyu2fbcJFBuD mSVK8XwRsUaIpf4eixqx5wAZg8q64kJ9R9e07WPqrC2+8p2F/7zlKsZ263CWZ/xE 0M6I4RiKSA24iaiGVrppnIrX1oX2v/dqUNaQL3uIgH1WWtf4apnDA7MVei2Iz2Nj FzLJ569wxzO92XBUrcEkqA7Xx0or6xijh0oFKxsygNqHzK3qf56McRi/xy1VFrGQ siZL1u4+cdIAu5/tWaecLFl0UOBBbYxz9QIDAQAB -----结束 RSA 公钥-----
使用 Base64 解码并用于加密数据后，服务器显示错误，加密密钥错误。此外，尝试将此密钥加载到 Delphi 程序的 LockBox 库中时，它会抛出异常“错误的非对称密钥”
该证书为：
-----开始证书----- MIIFGTCCBAGgAwIBAgITYwABPJqEcB3zrmJ2agABAAE8mjANBgkqhkiG9w0BAQwF ADBdMRIwEAYKCZImiZPyLGQBGRYCcGwxEzARBgoJkiaJk/IsZAEZFgNnb3YxEjAQ BgoJkiaJk/IsZAEZFgJtZjEeMBwGA1UEAxMVUmVzb3J0IEZpbmFuc293IEkxIENB MB4XDTIwMDcyMzExMjgyM1oXDTIyMDcyMzExMjgyM1owgZExCzAJBgNVBAYTAlBM MRQwEgYDVQQIEwttYXpvd2llY2tpZTERMA8GA1UEBxMIV2Fyc3phd2ExHzAdBgNV BAoMFk1pbmlzdGVyc3R3byBGaW5hbnPDs3cxHDAaBgNVBAsTE0FwbGlrYWNqZSBL cnl0eWN6bmUxGjAYBgNVBAMTEWV0dy10c3QubWYuZ292LnBsMIIBIjANBgkqhkiG 9w0BAQEFAAOCAQ8AMIIBCgKCAQEAr5qMxLWtgkId2oRUfnPf6MX+UouBQKOzyfG0 J9LW9yya8Nr+ilPTSPp+hSBL/TD1ijUZ2RClyegnrojOKHS7kp1ZFDQJwmKSW660 NKeLbyu2fbcJFBuDmSVK8XwRsUaIpf4eixqx5wAZg8q64kJ9R9e07WPqrC2+8p2F /7zlKsZ263CWZ/xE0M6I4RiKSA24iaiGVrppnIrX1oX2v/dqUNaQL3uIgH1WWtf4 apnDA7MVei2Iz2NjFzLJ569wxzO92XBUrcEkqA7Xx0or6xijh0oFKxsygNqHzK3q f56McRi/xy1VFrGQsiZL1u4+cdIAu5/tWaecLFl0UOBBbYxz9QIDAQABo4IBmzCC AZcwDgYDVR0PAQH/BAQDAgWgMD4GCSsGAQQBgjcVBwQxMC8GJysGAQQBgjcVCIS3 mFWE7NgBhrmTDYO18X6DrtM2gUKEotdOhMuPDgIBZAIBDDAdBgNVHQ4EFgQUnFcp uSFJZYUBUkIplCvJERbNN98wHwYDVR0jBBgwFoAUfR+t1nzLSol4VWy6EPLtM9Yx us0wRgYDVR0fBD8wPTA7oDmgN4Y1aHR0cDovL3BraS5tZi5nb3YucGwvY2RwL3Jl c29ydF9maW5hbnNvd19pMV9jYSgxKS5jcmwwdQYIKwYBBQUHAQEEaTBnMD4GCCsG AQUFBzAChjJodHRwOi8vcGtpLm1mLmdvdi5wbC9haWEvcmVzb3J0X2ZpbmFuc293 X2kxX2NhLmNydDAlBggrBgEFBQcwAYYZaHR0cDovL3BraS5tZi5nb3YucGwvb2Nz cDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwJwYJKwYBBAGCNxUKBBow GDAKBggrBgEFBQcDATAKBggrBgEFBQcDAjANBgkqhkiG9w0BAQwFAAOCAQEAHatd TuoQDgaydiNDZFPvbvnqO0wmD/sH54LkXnf49hXHcGQRjhBc7xsSDbKzxHEORJ08 wNWWJa0H8cbKCLytBq49FQnENYoi5sgMetM5XGqGSYHwFLTFyAf8A9af8rpqfAEY HwmL6iIjz6NmSD52i3owOaMCop4pyC+UU5CZDqBrYd10JY4bWRm5NPdjIga0+mDm hQYEkoW/AEQQam+VmyLsJFGtBl/kr5+EFIUFw8X2tFAubNTuxQsveLo91Q0lHtSt BMBJ7MYnJeFCGDeuPM65nJtCxexDfWfWSTZvGrdJSUooD5iFSZodCkReP7ZLiQmB dPB1oIhW3y/VUem3+A== -----证书结束-----
它是否正确地尝试从证书中提取该密钥？