AssertPathExists returns nil only if it has been successfully verified that all specified paths exists.

Base64Decode decodes the specified bytes as any of the Base64 dialects: standard encoding (+, /) and URL encoding (-, _), with or without padding.

Close is a helper for absorbing errors in the `defer x.Close()` pattern.

IterateSubfolders iterates over the subfolders of the specified path, calling the specified handler each time.

PathExists checks if the specified path exists.

ReadKey returns either the content of the file specified at path, if it exists, or []byte(key) otherwise.

SaveFile saves the file contents at the specified path atomically: - first save the content in a temp file with a random filename in the same dir - then rename the temp file to the specified filepath, overwriting the old file.

WalkDir recursively walks the file tree rooted at path, following symlinks (unlike filepath.Walk).

ForceHTTPS disables HTTP forcing in irma.HTTPTransport for all instances, regardless of the instance's ForceHTTPS member.