Add keccak_256 hashing

[thil4n]

Purpose

This PR introduces implementation for keccak256 hashing in Ballerina Crypto Module. Keccak-256 is widely used in blockchain related technologies and currently Ballerina crypto module does not provide the Keccak-256 algorithm.

Examples

string dataString = "Hello Ballerina";
byte[] data = dataString.toBytes();
byte[] hash = crypto:hashKeccak256(data);

Checklist

• Linked to an issue
• Updated the changelog
• Added tests
• Updated the spec
• Checked native-image compatibility

[MohamedSabthar]

@thil4n let's update the changelog.md file and add your newly proposed API in this spec documentation: https://github.com/ballerina-platform/module-ballerina-crypto/blob/master/docs/spec/spec.md

[ThisaruGuruge]

Code looks fine, let's update the spec and the changelog.

[daneshk]

Code looks fine, let's update the spec and the changelog.

@thil4n In addition, Could you please add a proposal for this new API in the docs/proposals directory and create an issue for this? The example proposal can be found here

[ThisaruGuruge]

LGTM

[thil4n]

Code looks fine, let's update the spec and the changelog.

@thil4n In addition, Could you please add a proposal for this new API in the docs/proposals directory and create an issue for this? The example proposal can be found here

Added a proposal, Also updated spec.md and changlog.md

[MohamedSabthar]

@thil4n let's resolve the conflicts

[thil4n]

@thil4n let's resolve the conflicts

Okay, will do.

[ThisaruGuruge]

LGTM

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud