Module presigned 

Presigned URL verification for AWS Signature Version 4.

Presigned URLs carry authentication information in query parameters rather than HTTP headers. The query parameters include:

• X-Amz-Algorithm - Must be AWS4-HMAC-SHA256
• X-Amz-Credential - AKID/date/region/service/aws4_request
• X-Amz-Date - ISO 8601 basic format timestamp (YYYYMMDDTHHMMSSZ)
• X-Amz-Expires - Validity duration in seconds
• X-Amz-SignedHeaders - Semicolon-separated signed header names
• X-Amz-Signature - The hex-encoded signature

For presigned URLs, the payload hash is always UNSIGNED-PAYLOAD.

Structs

ParsedPresignedParams

Parsed components from presigned URL query parameters.

Functions

parse_presigned_params

Parse presigned URL query parameters into their components.

verify_presigned

Verify a presigned URL request.