Representation of ASN.1 in APL nested structures

ABSTRACT

Abstract Syntax Notation One, or ASN.1, is a standardized data format for data networks and open system communications, defined by the ITU. Several TCP/IP protocols and security applications are based on it. In order to use APL to implement software solutions in this field, we need tools that allow us to manipulate data in ASN.1 format. This presentation gives an overview of the ASN.1 encoding and describes a mechanism for transforming complex ASN.1 contents into APL nested structures and vice versa. The handling of security certificates using Dyalog APL is also discussed. In fact, it would be possible to extend APL could convert any objects even a whole workspace, to ASN.1.

REFERENCES

• 1: ITU-T X.200 (07/94) The Basic Reference Model (OSI)
• 2: ITU-T X.208 (12/88) Specification of ASN.1
• 3: ITU-T X.209 (12/88) Specification of Basic Encoding Rules for ASN.1
• 4: ITU-T X.501 (11/93) The Directory: Models
• 5: ITU-T X.509 (03/00) The Directory: Public-Key and Attribute Certificate Frameworks
• 6: ITU-T X.520 (11/93) The Director: Selected Attribute Types
• 7: ITU-T X.680 (07/94) ASN.1 Specification of Basic Notation
• 8: ITU-T X.690 (07/94) ASN.1 Specification of Basic/Canonical/Distinguished Encoding Rules
• 9: RSA PKCS #1 (09/99) RSA Cryptography Standard (v2.1)
• 10: RSA PKCS #7 (05/97) Cryptographic Message Syntax Standard (v1.6)
• 11: RSA PKCS #9 (11/93) Selected Attribute Types (v1.1)

INDEX TERMS

Primary Classification:
  D. Software
  D.3 PROGRAMMING LANGUAGES
      D.3.2 Language Classifications

          Nouns: APL

Additional Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.0 General
      C.2.2 Network Protocols

General Terms:
Languages, Standardization