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Does java's TrustManager implementation ignore if a certificate has expired?
I tried the following:
- Using keytool and parameter -startdate "1970/01/01 00:00:00" I created a P12 keystore with an expired certificate.
- I exported the certificate:
Keystore type: PKCS12
Keystore provider: SunJSSE
Your keystore contains 1 entry
Alias name: fake
Creation date: 5 ╠ά± 2011
Entry type: PrivateKeyEntry
Certificate chain length: 1
Certificate[1]:
Owner: CN=Malicious, OU=Mal, O=Mal, L=Fake, ST=GR, C=GR
Issuer: CN=Malicious, OU=Mal, O=Mal, L=Fake, ST=GR, C=GR
Serial number: -1c20
Valid from: Thu Jan 01 00:00:00 EET 1970 until: Fri Jan 02 00:00:00 EET 1970
Certificate fingerprints:
MD5: A9:BE:3A:3D:45:24:1B:4F:3C:9B:2E:02:E3:57:86:11
SHA1: 21:9D:E1:04:09:CF:10:58:73:C4:62:3C:46:4C:76:A3:81:56:88:4D
Signature algorithm name: SHA1withRSA
Version: 3
*******************************************
I used this certificate as server certificate for Tomcat.
Then using an apache httpClient I connected to tomcat, but first I added the expired certificate to the client's trust-store (using a TrustManager
TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
and loading the expired certificate).
I was expecting the connection to fail.
Instead the connection succeeds.
Using System.setProperty("javax.net.debug", "ssl");
I see:
***
Found trusted certificate:
[
[
Version: V3
Subject: CN=Malicious, OU=Mal, O=Mal, L=Fake, ST=GR, C=GR
Signature Algorithm: SHA1withRSA, OID = 1.2.840.113549.1.1.5
Key: Sun RSA public key, 1024 bits
modulus: 103505550241486353387352204821576872670551399069981699225523573573463728861649080679830970375409225198088456622953795796973617844800523719355651295538603042548325657233735862777322961575720409897968306234