openssl - 将 CA 签名的 JKS keystore 转换为 PEM

Question

我有一个带有 CA 签名证书的 JKS keystore 。我需要将其导出为 PEM 格式才能与 nginx 一起使用。我需要以包含整个链的方式进行操作，以便我的客户可以验证签名。

如果我做类似的事情:

keytool -exportcert -keystore mykestore.jks -file mycert.crt -alias myalias
openssl x509 -out mycert.crt.pem -outform pem -in mycert.crt -inform der

仅包含最低级别的证书。验证失败:

$ openssl s_client -connect localhost:443
CONNECTED(00000003)
depth=0 /O=*.mydomain.com/OU=Domain Control Validated/CN=*.mydomain.com
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 /O=*.mydomain.com/OU=Domain Control Validated/CN=*.mydomain.com
verify error:num=27:certificate not trusted
verify return:1
depth=0 /O=*.mydomain.com/OU=Domain Control Validated/CN=*.mydomain.com
verify error:num=21:unable to verify the first certificate
verify return:1
---
Certificate chain
 0 s:/O=*.mydomain.com/OU=Domain Control Validated/CN=*.mydomain.com
   i:/C=US/ST=Arizona/L=Scottsdale/O=GoDaddy.com, Inc./OU=http://certificates.godaddy.com/repository/CN=Go Daddy Secure Certification Authority/serialNumber=123123
... (only one certificate!)
...
SSL-Session:
    ...
    Verify return code: 21 (unable to verify the first certificate)

来自 Java:

sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

而具有相同 JKS keystore 的 Jetty 会打印以下内容:

$ openssl s_client -connect localhost:8084
CONNECTED(00000003)
depth=2 /C=US/O=The Go Daddy Group, Inc./OU=Go Daddy Class 2 Certification Authority
verify error:num=19:self signed certificate in certificate chain
verify return:0
---
Certificate chain
 0 s:/O=*.mydomain.com/OU=Domain Control Validated/CN=*.mydomain.com
   i:/C=US/ST=Arizona/L=Scottsdale/O=GoDaddy.com, Inc./OU=http://certificates.godaddy.com/repository/CN=Go Daddy Secure Certification Authority/serialNumber=1234
 1 s:/C=US/ST=Arizona/L=Scottsdale/O=GoDaddy.com, Inc./OU=http://certificates.godaddy.com/repository/CN=Go Daddy Secure Certification Authority/serialNumber=1234
   i:/C=US/O=The Go Daddy Group, Inc./OU=Go Daddy Class 2 Certification Authority
 2 s:/C=US/O=The Go Daddy Group, Inc./OU=Go Daddy Class 2 Certification Authority
   i:/C=US/O=The Go Daddy Group, Inc./OU=Go Daddy Class 2 Certification Authority
...
SSL-Session:
    Verify return code: 19 (self signed certificate in certificate chain)

虽然 openssl 返回 19 错误，但它不再是 Java HttpsURLConnection 的问题，而这就是我所关心的。

那么，如何以适用于 nginx 服务器和 Java 客户端的格式(例如 PEM)从 JKS 导出整个链？我错过了什么？

Answer 1

您可以轻松地将 JKS 文件转换为 PKCS12 文件:

keytool -importkeystore -srckeystore keystore.jks -srcstoretype JKS -deststoretype PKCS12 -destkeystore keystore.p12

然后您可以使用以下命令提取私钥和任何证书:

openssl pkcs12 -in keystore.p12