aws/aws-encryption-sdk-cli

Base64 error messaging in version and type verification

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#162 opened on Sep 19, 2019

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good first issue

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Description

When the version and type elements of the AWS Encryption Message format are verified, the error message should be customize if the version and type match the base64 value. This is convent sugar for a common problem.

Valid blobs will have the first 2 bytes in HEX will be: 01, 80, and in DEC 01, 128 Valid blobs that have not been properly base64 decoded the values in HEX will be 41, 59, and in DEC 65, 89

https://github.com/awslabs/aws-encryption-sdk-javascript/pull/217

Contributor guide

Research direction
Add logic to detect base64 encoded version and type bytes by checking for ASCII values 65 and 89, and then provide a custom error message suggesting proper base64 decoding.
Tech stack
python
Domain
security
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Python
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
90