SignAPK - PEM file AND PK8 file

Question

What is PEM file & Pk8 file . Where can i find these for android apk. I need to use this to sign apk manually through SignApk.jar.

java -jar SignApk.jar certificate.pem key.pk8 PlatformOne.apk pf1.apk

This tool has integrated pem file & pk8 file. but i need my own private key signing.

Why dont you sign the apk directly from eclipse? – antonis lambrianides Sep 12 '14 at 11:25 — antonis lambrianides, Sep 12 '14 at 11:25

score 10 · Accepted Answer · answered Sep 12 '14 at 11:20

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The whole procedure looks very well explained here How to Sign Android APK or Zip Files

answered Sep 12 '14 at 11:20

Rover Wanderer

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Thank you Rover.. It is a great answer for my question :) – Gayan Dinuzhka Sep 15 '14 at 05:39
java -jar signapk.jar certificate.pem key.pk8 your-app.apk your-signed-app.apk OR java -jar signapk.jar certificate.pem key.pk8 your-update.zip your-signed-update.zip – Shridutt Kothari Sep 21 '16 at 08:09
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Link is broken and goes to what looks like a malware site? – scorpiodawg May 25 '18 at 00:35

score 3 · Answer 2 · edited Apr 18 '18 at 08:39

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Go to your device rom. Here you will find etc named folder. Then open it and now you will find a folder named security. Open that now. You will find a zip file named otacerts.zip. Open that now and you will find your pem file

edited Apr 18 '18 at 08:39

ascripter

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answered Apr 18 '18 at 07:56

manish

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where is the key.pk8 file? – Ihdina Aug 27 '18 at 11:33
can't find the key.pk8 file anywhere – Jaswant Singh Nov 01 '19 at 12:55

Alex Martian · Answer 3 · 2019-09-11T10:41:35.673

The link in Rover Wanderer answer How to Sign Android APK or Zip Files details how to make and use pem and pk8 files. I will add here the answer to unanswered part: "What is PEM file & Pk8 file".

pem file is explained in good detail here (https://serverfault.com/questions/9708/what-is-a-pem-file-and-how-does-it-differ-from-other-openssl-generated-key-file). In couple of words certificate.pemis a container format file that in our example would include public certificate.

pk8 is a format used to carry private certificate keypairs (Wikipedia on PKCS).

SignAPK - PEM file AND PK8 file

3 Answers3