Struct rocket::mtls::x509::X509Extension

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pub struct X509Extension<'a> {
    pub oid: Oid<'a>,
    pub critical: bool,
    pub value: &'a [u8],
    /* private fields */
}
Available on crate feature mtls only.
Expand description

X.509 version 3 extension

X.509 extensions allow adding attributes to objects like certificates or revocation lists.

Each extension in a certificate is designated as either critical or non-critical. A certificate using system MUST reject the certificate if it encounters a critical extension it does not recognize; however, a non-critical extension MAY be ignored if it is not recognized.

Each extension includes an OID and an ASN.1 structure. When an extension appears in a certificate, the OID appears as the field extnID and the corresponding ASN.1 encoded structure is the value of the octet string extnValue. A certificate MUST NOT include more than one instance of a particular extension.

When parsing an extension, the global extension structure (described above) is parsed, and the object is returned if it succeeds. During this step, it also attempts to parse the content of the extension, if known. The returned object has a X509Extension::parsed_extension() method. The returned enum is either a known extension, or the special value ParsedExtension::UnsupportedExtension.

§Example

use x509_parser::prelude::FromDer;
use x509_parser::extensions::{X509Extension, ParsedExtension};

static DER: &[u8] = &[
   0x30, 0x1D, 0x06, 0x03, 0x55, 0x1D, 0x0E, 0x04, 0x16, 0x04, 0x14, 0xA3, 0x05, 0x2F, 0x18,
   0x60, 0x50, 0xC2, 0x89, 0x0A, 0xDD, 0x2B, 0x21, 0x4F, 0xFF, 0x8E, 0x4E, 0xA8, 0x30, 0x31,
   0x36 ];

let res = X509Extension::from_der(DER);
match res {
    Ok((_rem, ext)) => {
        println!("Extension OID: {}", ext.oid);
        println!("  Critical: {}", ext.critical);
        let parsed_ext = ext.parsed_extension();
        assert!(!parsed_ext.unsupported());
        assert!(parsed_ext.error().is_none());
        if let ParsedExtension::SubjectKeyIdentifier(key_id) = parsed_ext {
            assert!(key_id.0.len() > 0);
        } else {
            panic!("Extension has wrong type");
        }
    },
    _ => panic!("x509 extension parsing failed: {:?}", res),
}

Fields§

§oid: Oid<'a>

OID describing the extension content

§critical: bool

Boolean value describing the ‘critical’ attribute of the extension

An extension includes the boolean critical, with a default value of FALSE.

§value: &'a [u8]

Raw content of the extension

Implementations§

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impl<'a> X509Extension<'a>

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pub const fn new( oid: Oid<'a>, critical: bool, value: &'a [u8], parsed_extension: ParsedExtension<'a>, ) -> X509Extension<'a>

Creates a new extension with the provided values.

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pub fn parsed_extension(&self) -> &ParsedExtension<'a>

Return the extension type or UnsupportedExtension if the extension is not implemented.

Trait Implementations§

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impl<'a> Clone for X509Extension<'a>

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fn clone(&self) -> X509Extension<'a>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'a> Debug for X509Extension<'a>

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

Formats the value using the given formatter. Read more
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impl<'a> FromDer<'a, X509Error> for X509Extension<'a>

Extension  ::=  SEQUENCE  {
    extnID      OBJECT IDENTIFIER,
    critical    BOOLEAN DEFAULT FALSE,
    extnValue   OCTET STRING  }
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fn from_der( i: &'a [u8], ) -> Result<(&'a [u8], X509Extension<'a>), Err<X509Error>>

Attempt to parse input bytes into a DER object (enforcing constraints)
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impl<'a> Parser<&'a [u8], X509Extension<'a>, X509Error> for X509ExtensionParser

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fn parse( &mut self, input: &'a [u8], ) -> Result<(&'a [u8], X509Extension<'a>), Err<X509Error>>

A parser takes in input type, and returns a Result containing either the remaining input and the output value, or an error
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fn map<G, O2>(self, g: G) -> Map<Self, G, O>
where G: Fn(O) -> O2, Self: Sized,

Maps a function over the result of a parser
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fn flat_map<G, H, O2>(self, g: G) -> FlatMap<Self, G, O>
where G: FnMut(O) -> H, H: Parser<I, O2, E>, Self: Sized,

Creates a second parser from the output of the first one, then apply over the rest of the input
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fn and_then<G, O2>(self, g: G) -> AndThen<Self, G, O>
where G: Parser<O, O2, E>, Self: Sized,

Applies a second parser over the output of the first one
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fn and<G, O2>(self, g: G) -> And<Self, G>
where G: Parser<I, O2, E>, Self: Sized,

Applies a second parser after the first one, return their results as a tuple
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fn or<G>(self, g: G) -> Or<Self, G>
where G: Parser<I, O, E>, Self: Sized,

Applies a second parser over the input if the first one failed
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where O2: From<O>, E2: From<E>, Self: Sized,

automatically converts the parser’s output and error values to another type, as long as they implement the From trait
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impl<'a> PartialEq for X509Extension<'a>

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fn eq(&self, other: &X509Extension<'a>) -> bool

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<'a> StructuralPartialEq for X509Extension<'a>

Auto Trait Implementations§

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impl<'a> Freeze for X509Extension<'a>

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impl<'a> RefUnwindSafe for X509Extension<'a>

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impl<'a> Send for X509Extension<'a>

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impl<'a> Sync for X509Extension<'a>

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impl<'a> Unpin for X509Extension<'a>

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impl<'a> UnwindSafe for X509Extension<'a>

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Gets the TypeId of self. Read more
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