Module asn1

Defines the format of certificates

This module is used by x509 and other certificate building functions to describe time, strings, and objects.

Abstract Syntax Notation One is an interface description language. The specification comes from X.208 by OSI, and rewritten in X.680. ASN.1 describes properties of an object with a type set. Those types can be atomic, structured, choice, and other (CHOICE and ANY). These types are expressed as a number and the assignment operator ::= gives the type a name.

The implementation here provides a subset of the ASN.1 types that OpenSSL uses, especially in the properties of a certificate used in HTTPS.

Examples

use openssl::asn1::Asn1Time;
let tomorrow = Asn1Time::days_from_now(1);

Structs

• Asn1BitString
  Sequence of bytes
• Asn1BitStringRef
  A reference to an Asn1BitString.
• Asn1Enumerated
  An ASN.1 enumerated.
• Asn1EnumeratedRef
  A reference to an Asn1Enumerated.
• Asn1GeneralizedTime
  Non-UTC representation of time
• Asn1GeneralizedTimeRef
  Reference to a Asn1GeneralizedTime
• Asn1Integer
  Numeric representation
• Asn1IntegerRef
  A reference to an Asn1Integer.
• Asn1Object
  Object Identifier
• Asn1ObjectRef
  A reference to an Asn1Object.
• Asn1OctetString
  ASN.1 OCTET STRING type
• Asn1OctetStringRef
  A reference to an Asn1OctetString.
• Asn1String
  Primary ASN.1 type used by OpenSSL
• Asn1StringRef
  A reference to an Asn1String.
• Asn1Time
  Time storage and comparison
• Asn1TimeRef
  Reference to an Asn1Time
• Asn1Type
  The type of an ASN.1 value.
• TimeDiff
  Difference between two ASN1 times.