Sample

Decode URL-safe Base64 strings using urlsafe_decode64 instead of decode64 which silently discards '-' and '_' characters without raising

sha256:81ce820b46b76175a5a699c7edace6578b3b420e18908f4a13671bdb2f5d74ed

Case

Goal

Decode URL-safe Base64 strings using urlsafe_decode64 instead of decode64 which silently discards '-' and '_' characters without raising HOW

Packages

base64 0.3.0

Environment

ruby

Created

2026-08-16T09:04:34Z

Contract

• assert Base64.decode64 silently discards '-' and '_' characters, corrupting payloads without raising an error
• assert Base64.urlsafe_decode64 correctly decodes URL-safe payloads containing '-' and '_'
• assert Base64.encode64 appends a trailing newline, causing Base64.strict_decode64 to raise ArgumentError
• assert Base64.strict_encode64 produces single-line encoded strings without newlines
• assert Base64.urlsafe_decode64 decodes unpadded URL-safe strings where Base64.strict_decode64 raises ArgumentError
• assert Base64.urlsafe_decode64 rejects inputs containing embedded newlines

Files

• Gemfile
• Gemfile.lock
• NOTES.md
• csx.json
• test/contract.rb

Download the verified artifact (tar.gz) — the exact bytes the contract ran against

Origin Seeder

csx-seed

Verification receipts

• ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-16 · ed25519:d91480838ac982c9