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Importing or exporting the Lowkey Vault Self‐Signed certificate

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Esta Nagy edited this page Jul 12, 2024 · 4 revisions

When you are using Lowkey Vault through HTTPS with the default self-signed certificate it ships with, you may need to create a custom key store you can use in your tests or whenever you are launching your application locally.

In these situations, you can find the latest key store here.

Tip

The certificates are valid for multiple years, so no need to worry about frequent renewal effort!

Note

The aforementioned key store uses the default password changeit as store pass.

Exporting the certificate from the key store

1. List the certificates first:

keytool -list -keystore keystore.p12 -storepass changeit

Displaying

Keystore type: PKCS12
Keystore provider: SUN

Your keystore contains 1 entry

lowkey-vault.local, Aug 26, 2022, PrivateKeyEntry,
Certificate fingerprint (SHA-256): C3:A4:FD:20:3A:8F:CC:93:89:67:0E:C2:8F:E0:B7:62:62:4D:A9:05:90:A0:4A:37:73:B6:92:5B:96:75:F1:48

2. Export the certificate:

keytool -exportcert -alias lowkey-vault.local -file exportedcert.pem -rfc -keystore keystore.p12 -storepass changeit

Displaying:

Certificate stored in file <exportedcert.pem>

Importing the exported certificate into your key store

1. Create a copy of the default Java trust store (normally located under $JAVA_HOME/lib/security/cacerts)

Caution

Importing a publicly available self-signed certificate into your default trust store may introduce security risks. You should prefer to use at least an application specific copy of the key store to reduce the risk.

cp $JAVA_HOME/lib/security/cacerts mycacerts

Providing no output when successful.

2. Import the Lowkey Vault certs into the copy of the cacerts

keytool -import -alias lowkey-vault.local -file exportedcert.pem -keystore mycacerts -storepass changeit

Which will display the certificate details and ask you whether you trust the certificate or not:

Owner: CN=lowkey-vault.local
Issuer: CN=lowkey-vault.local
Serial number: 43bece907703d128
Valid from: Fri Aug 26 22:49:56 CEST 2022 until: Mon Aug 23 22:49:56 CEST 2032
Certificate fingerprints:
         SHA1: 62:9D:34:CA:20:AB:26:78:44:15:5B:39:A3:68:3F:40:CC:43:15:DC
         SHA256: C3:A4:FD:20:3A:8F:CC:93:89:67:0E:C2:8F:E0:B7:62:62:4D:A9:05:90:A0:4A:37:73:B6:92:5B:96:75:F1:48
Signature algorithm name: SHA384withRSA
Subject Public Key Algorithm: 4096-bit RSA key
Version: 3

Extensions:

#1: ObjectId: 2.5.29.17 Criticality=false
SubjectAlternativeName [
  DNSName: lowkey-vault.local
  DNSName: lowkey-vault
  DNSName: *.localhost
  DNSName: *.lowkey-vault
  DNSName: *.lowkey-vault.local
  DNSName: *.default.svc.cluster.local
  DNSName: localhost
  IPAddress: 127.0.0.1
]

#2: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: 95 B8 A5 7A F3 0A 33 55   D2 79 7F D8 25 EA 25 63  ...z..3U.y..%.%c
0010: ED 17 06 7C                                        ....
]
]

Trust this certificate? [no]:

Answer yes if you want to trust it. The response should be:

Certificate was added to keystore

3. Verifiy that the install was successful

keytool -list -keystore mycacerts -storepass changeit

Look for an entry similar to these lines in the output:

lowkey-vault.local, Jul 12, 2024, trustedCertEntry,
Certificate fingerprint (SHA-256): C3:A4:FD:20:3A:8F:CC:93:89:67:0E:C2:8F:E0:B7:62:62:4D:A9:05:90:A0:4A:37:73:B6:92:5B:96:75:F1:48

Use your new key store

1. Add the necessary system properties

When you intend to use the new key store, you can set it with the following system properties to your Java process:

-Djavax.net.ssl.trustStore=mycacerts -Djavax.net.ssl.trustStorePassword=changeit -Djavax.net.ssl.trustStoreType=JKS
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