java - creating your keystore and generating

We can create a keystore using keytool command as shown here:- 

keytool -genkeypair -v -keystore your-keystore.jks -keyalg RSA -keysize 2048 -validity 10000 -alias your-alias-name

Parameters explained:

- -keystore your-keystore.jks - Output filename

- -keyalg RSA - Algorithm (RSA is standard)

- -keysize 2048 - Key size (2048-bit recommended)

- -validity 10000 - Validity in days (10000 days ≈ 27 years)

- -alias your-alias-name - Identifier for the key

You'll be prompted for:

- Keystore password

- Your name, organization, city, state, country code

To get SHA-1 fingerprint of your key (needed for Google OAuth):

And you can then list down the SHA1 of your 


keytool -keystore your-keystore.jks -list -v


Here is a quick breakdown of what those flags are actually doing:

  • -keystore your-keystore.jks: Points the tool to your specific keystore file.

  • -list: Tells the tool, "Show me what's inside this file." By default, this only shows a brief summary (the alias name, creation date, and SHA fingerprint).

  • -v: Stands for Verbose. This is the magic flag that instructs it to print everything—the owner, issuer, validity dates, serial number, and all fingerprint algorithms (MD5, SHA-1, SHA-256).


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