Enum csp::Source

pub enum Source<'a> {
    Host(&'a str),
    Scheme(&'a str),
    Self_,
    UnsafeEval,
    WasmUnsafeEval,
    UnsafeHashes,
    UnsafeInline,
    Nonce(&'a str),
    Hash((&'a str, &'a str)),
    StrictDynamic,
    ReportSample,
}

The source that a bunch of directives can have multiple of.

If nothing gets added, becomes ‘none’.

Variants

Host(&'a str)

Internet hosts by name or IP address, as well as an optional URL scheme and/or port number.

The site’s address may include an optional leading wildcard (the asterisk character, ‘’), and you may use a wildcard (again, ‘’) as the port number, indicating that all legal ports are valid for the source. Examples:

• http://*.example.com: Matches all attempts to load from any subdomain of example.com using the http: URL scheme.
• mail.example.com:443: Matches all attempts to access port 443 on mail.example.com.
• https://store.example.com: Matches all attempts to access store.example.com using https:.

Scheme(&'a str)

A schema such as ‘http’ or ‘https’.

The colon is automatically added to the end. You can also specify data schemas (not recommended).

• data Allows data: URIs to be used as a content source. This is insecure; an attacker can also inject arbitrary data: URIs. Use this sparingly and definitely not for scripts.
• mediastream Allows mediastream: URIs to be used as a content source.
• blob Allows blob: URIs to be used as a content source.
• filesystem Allows filesystem: URIs to be used as a content source.

Self_

Refers to the origin from which the protected document is being served, including the same URL scheme and port number.

Some browsers specifically exclude blob and filesystem from source directives. Sites needing to allow these content types can specify them using the Data attribute.

UnsafeEval

Allows the use of eval() and similar methods for creating code from strings.

WasmUnsafeEval

Allows the compilation and instantiation of WebAssembly.

UnsafeHashes

Allows to enable specific inline event handlers. If you only need to allow inline event handlers and not inline <script> elements or javascript: URLs, this is a safer method compared to using the unsafe-inline expression.

UnsafeInline

Allows the use of inline resources, such as inline <script> elements, javascript: URLs, inline event handlers, and inline <\style> elements.

Nonce(&'a str)

A whitelist for specific inline scripts using a cryptographic nonce (number used once). The server must generate a unique nonce value each time it transmits a policy. It is critical to provide an unguessable nonce, as bypassing a resource’s policy is otherwise trivial. See unsafe inline script for an example. Specifying nonce makes a modern browser ignore 'unsafe-inline' which could still be set for older browsers without nonce support.

Hash((&'a str, &'a str))

A sha256, sha384 or sha512 hash of scripts or styles. The use of this source consists of two portions separated by a dash: the encryption algorithm used to create the hash and the base64-encoded hash of the script or style. When generating the hash, don’t include the <script> or <style> tags and note that capitalization and whitespace matter, including leading or trailing whitespace. See unsafe inline script for an example. In CSP 2.0 this applied only to inline scripts. CSP 3.0 allows it in the case of script-src for external scripts.

StrictDynamic

The strict-dynamic source expression specifies that the trust explicitly given to a script present in the markup, by accompanying it with a nonce or a hash, shall be propagated to all the scripts loaded by that root script. At the same time, any whitelist or source expressions such as 'self' or 'unsafe-inline' will be ignored. See script-src for an example.

ReportSample

Requires a sample of the violating code to be included in the violation report.

Trait Implementations

impl<'a> Clone for Source<'a>

fn clone(&self) -> Source<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for Source<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> Display for Source<'a>

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.