How to Import *.p7s certificate chain into keystore?

Question

I've used this commands to create my csr

keytool -genkey -alias server -keyalg RSA -keysize 2048 -keystore domain.jks -dname "CN=*.domain.com,OU=Software Development, O=Company Name, L=Asuncion, ST=Central, C=PY"
keytool -certreq -alias server -keyalg RSA -sigalg SHA256withRSA -file domain.csr -keystore domain.jks

Then I've got my certificate signed

Web Server CERTIFICATE
-----------------
-----BEGIN CERTIFICATE-----
MIIFZjCCBE6gAwIBAgIQeg8KZmYMVuy/9w/yfpEWozANBgkqhkiG9w0BAQsFADBC
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-----END CERTIFICATE-----

INTERMEDIATE CA:
---------------------------------------
-----BEGIN CERTIFICATE-----
MIIETTCCAzWgAwIBAgIDAjpxMA0GCSqGSIb3DQEBCwUAMEIxCzAJBgNVBAYTAlVTMRYwFAYDVQQK
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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
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-----END CERTIFICATE-----

I also received a p7s file (domain.com.p7s)

I've tried in many different ways to import it properly to the keystore but I get the error that shows in this page https://thedomain.com/ > ERR_CERT_AUTHORITY_INVALID

What is the command to import this chain ? this is not the first time I am doing this but this time I just can't get it to work.

Solution

In your case, as you already have the private key in your keystore, you can import the PKCS#7 certificate chain (*.p7s / *.p7b ...) thanks to this command :

 keytool -import -alias <same alias as the key> -file <p7 filename> -keystore <keystore filename>

Whereas, if you want to import a certificate chain whitout having the key in the keystore, keytool does not accept to import it in one shot and so you have to follow this method (or if the previous method did not work):

To proceed, just create one pem file per certificate and import them in the keystore, setting the same alias for the certificate as the key alias.

(the content of each pem file is the base64 form of the certificate :

-----BEGIN CERTIFICATE-----

...

-----END CERTIFICATE-----

)

To import a certificate with keytool :

keytool -import -alias server -file server.pem -trustcacerts -keystore domain.jks

Sources :

• personal experience
• comments of this answer (thanks to David Hofmann and dave_thompson_085)
• another question for a pkcs#7 problem : https://stackoverflow.com/questions/25983440/keytool-keytool-error-java-lang-exception-input-not-an-x-509-certificate

Note :
kse51 can be very useful when managing keystore. You can find it here : https://sourceforge.net/projects/keystore-explorer/ . (I have no relation with the software editor)

Comments

[Admin]

The .p7s file is a certificate for digital signed emails.

[David Hofmann]

this actually solves the problem, and yes, keytool does work with p7s files, at least on my case stackoverflow.com/a/35857320/39998

[dave_thompson_085]

@DavidHofmann specifically, keytool accepts a pkcs7 chain of certs for your privatekey (or exactly, for a privatekey entry in your keystore), but not one with certs that are for (an)other key(s), including (a) key(s) belonging to (an)other party(ies).

[zr_ifrit]

thanks for those informations @dave_thompson_085 , I updated my answer