How do I sign and verify images for Trunk-based development?

In Trunk-based development, ensuring the integrity and authenticity of images is crucial. This can be achieved by signing the images and later verifying them when pulling images from the repository. Below is a simple example of how to sign and verify images using a public/private key pair.

// Create a private key $privateKey = openssl_pkey_new(); openssl_pkey_export($privateKey, $privateKeyOut); // Generate a public key $publicKey = openssl_pkey_get_details($privateKey)['key']; // The image data to be signed $imageData = 'Sample Image Data'; // Sign the image data openssl_sign($imageData, $signature, $privateKeyOut, OPENSSL_ALGO_SHA256); // To verify the image signature $isValidSignature = openssl_verify($imageData, $signature, $publicKey, OPENSSL_ALGO_SHA256); if($isValidSignature === 1) { echo "Signature is valid."; } elseif($isValidSignature === 0) { echo "Signature is invalid."; } else { echo "Error verifying signature."; }

devops trunk-based development image signing image verification openssl php

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