Resign apk with different keystore

Question

Currently I'm getting the apk signed with the private keystore file but I want to sign that apk with different keystore file. How can I resign that apk..?

please explain ..1- are you want to sign the same signed apk or new apk of same project...... — Dheeresh Singh, Jun 06 '12 at 11:25
Possible duplicate of [Can I re-sign an .apk with a different certificate than what it came with?](https://stackoverflow.com/questions/3267216/can-i-re-sign-an-apk-with-a-different-certificate-than-what-it-came-with) — Peter F, Jan 07 '19 at 14:51

score 37 · Answer 1 · edited Mar 14 '13 at 15:20

You can resign your apk with different keystore.

Follow these steps:

Signing for release: $1.apk -> $1_release.apk"

Step 1: Removing any previous signing

Change the extension of your .apk to .zip.
Open and delete the folder META-INF
Change the extension to .apk
Or
Command: zip [originalapk]
Example: zip "$1".apk -d

Step 2: Signing with release.keystore:

Command:

jarsigner –verbose –keystore [keystorefile] –signedjar [unalignedapk] [originalapk] alias_name

Example:

C:\Program Files\Java\jdk1.6.0_43\bin> jarsigner -verbose -keystore release.keystore -signedjar "$1"_unaligned.apk "$1".apk release

Step 3: Aligning

Command: zipalign -f 4 [unalignedapk] [releaseapk]

Example:

C:\Users\Downloads\adt-bundle-windows-x86\adt-bundle-windows-x86\sdk\too ls>zipalign -f 4 "$1"_unaligned.apk "$1"_release.apk

Step 4: Cleaning up

Command: rm 4 [unalignedapk]
Example: rm "$1"_unaligned.apk

Additional Commands might help:

To generate new key with keytool

keytool -genkey -alias  -keystore

To list keys

keytool -list -keystore

Note:

To sign our apks we have downgraded JDK from 1.7 to 1.6.0_43 update.

Reason:

As of JDK 7, the default signing algorithim has changed, requiring you to specify the signature and digest algorithims (-sigalg and -digestalg) when you sign an APK.

Command:

jarsigner -verbose -sigalg MD5withRSA -digestalg SHA1 -keystore [keystorefile] [originalapk] alias_name

I needed `zipalign -p -f 4`, specifically (note the extra `-p`) — Erhannis, Sep 28 '21 at 17:32

score 19 · Accepted Answer · edited May 23 '17 at 12:25

19

you should check below SO thread

Can I resign an .apk with a different certificate

or this one also may help you

edited May 23 '17 at 12:25

Community

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answered Jun 06 '12 at 11:27

swiftBoy

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what would be the path for this command..Jarsigner -verbose -keystore debug.keystore yourapk.apk aliasname – Rookie Jun 06 '12 at 11:43

Aksel Fatih · Answer 3 · 2017-06-29T11:39:59.097

10

You can also use the open-source apk-resigner script, which is very easy to use.

APK-resigner: https://github.com/onbiron/apk-resigner

./signapk.sh calculator.apk ~/.android/debug.keystore android androiddebugkey

Also if you want to sign the APK with your debug key, you may use.

./signapk.sh calculator.apk

edited Jun 29 '17 at 11:39

answered Apr 03 '13 at 11:27

Aksel Fatih

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score 7 · Answer 4 · answered Jul 31 '16 at 04:53

remove old sign

zip -d xxxx.apk(your apk file) META-INF/*
sign apk

jarsigner -verbose -keystore xxxx.keystore(your keystore) -signedjar out_sign.apk(outfile) unsign.apk(unsign apk) xxxxxalias(your alias)
if sign apk not work and jdk >= 1.7

add params -digestalg SHA1 -sigalg MD5withRSA
jarsigner -verbose -digestalg SHA1 -sigalg MD5withRSA -keystore xxxx.keystore(your keystore) -signedjar out_sign.apk(outfile) unsign.apk(unsign apk) xxxxxalias(your alias)

Resign apk with different keystore

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