Struct der::asn1::ContextSpecific[][src]

pub struct ContextSpecific<T> {
    pub tag_number: TagNumber,
    pub tag_mode: TagMode,
    pub value: T,
}
Expand description

Context-specific field which wraps an owned inner value.

This type decodes/encodes a field which is specific to a particular context and is identified by a TagNumber.

Fields

tag_number: TagNumber

Context-specific tag number sans the leading 0b10000000 class identifier bit and 0b100000 constructed flag.

tag_mode: TagMode

Tag mode: EXPLICIT VS IMPLICIT.

value: T

Value of the field.

Implementations

Attempt to decode an EXPLICIT ASN.1 CONTEXT-SPECIFIC field with the provided TagNumber.

This method has the following behavior which is designed to simplify handling of extension fields, which are denoted in an ASN.1 schema using the ... ellipsis extension marker:

  • Skips over ContextSpecific fields with a tag number lower than the current one, consuming and ignoring them.
  • Returns Ok(None) if a ContextSpecific field with a higher tag number is encountered. These fields are not consumed in this case, allowing a field with a lower tag number to be omitted, then the higher numbered field consumed as a follow-up.
  • Returns Ok(None) if anything other than a ContextSpecific field is encountered.

Attempt to decode an IMPLICIT ASN.1 CONTEXT-SPECIFIC field with the provided TagNumber.

This method otherwise behaves the same as decode_explicit, but should be used in cases where the particular fields are IMPLICIT as opposed to EXPLICIT.

Get a ContextSpecificRef for this field.

Trait Implementations

Is the provided Tag decodable as a variant of this CHOICE?

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Attempt to decode this message using the provided decoder.

Parse Self from the provided DER-encoded byte slice.

Compute the length of this value (sans Tag+Length header) when encoded as ASN.1 DER. Read more

Encode value (sans Tag+Length header) as ASN.1 DER using the provided Encoder. Read more

Get the Header used to encode this value.

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Get the ASN.1 tag that this type is encoded with.

The type returned in the event of a conversion error.

Performs the conversion.

Return an Ordering between value portion of TLV-encoded self and other when serialized as ASN.1 DER. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

Should always be Self

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.