keytool error: java.io.IOException: DER input, Integer tag error

Question

I'm trying to convert a private key in a Java Keystore into PEM Format. This answer explains that the first step is to convert the keystore into PKCS12 format using the keytool command.

However, I get the following error:

$ keytool -importkeystore -srckeystore client.keystore.jks -destkeystore client1.p12 -srcstoretype JKS -deststoretype PKCS12 -srcalias client1 -destalias client1
...
keytool error: java.io.IOException: DER input, Integer tag error

Searching for this error online tells me that this has to do with encryption. I know the source keystore is encrypted, but supplying the passwords in the command gives the exact same error. How can I export the private key?

Merlijn Sebrechts · Accepted Answer · 2020-01-27 15:59:50Z

1

The issue turned out to be the destination keystore, not the source one. The file client1.p12 already existed but it was in an incompatible format.

The solution was to remove the file client1.p12 and run the keytool command again.

answered Jan 27, 2020 at 15:59

Merlijn Sebrechts

6432 gold badges7 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

keytool error: java.io.IOException: DER input, Integer tag error

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related