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Topic: Basic encoding rules


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In the News (Thu 31 Dec 09)

  
  Canonical encoding rules - Wikipedia, the free encyclopedia
Canonical encoding rules (CER) are a restricted variant of basic encoding rules for producing unequivocal transfer syntax for data structures described by ASN.1.
Whereas BER gives choices as to how data values may be encoded, CER and DER select just one encoding from those allowed by the basic encoding rules, eliminating all of the options.
The basic difference between CER and DER is that DER uses definitive length form and CER uses indefinite length form in some precisely defined cases.
en.wikipedia.org /wiki/Canonical_encoding_rules   (159 words)

  
 Basic encoding rules - Wikipedia, the free encyclopedia
Basic encoding rules (BER) are ASN.1 encoding rules for producing self-identifying and self-delimiting transfer syntax for data structures described in ASN.1 notations.
BER is a self-identifying and self-delimiting encoding scheme, which means that each data value can be identified, extracted and decoded individually.
Huw Rogers once described BER as "a triumph of bloated theory over clean implementation".
en.wikipedia.org /wiki/Basic_encoding_rules   (133 words)

  
 OSS Nokalva - Encoding Rules
ASN.1 encoding rules are sets of rules used to transform data specified in the ASN.1 language into a standard format that can be decoded on any system that has a decoder based on the same set of rules.
They have since been separated, but it is still common for the terms ASN.1 and BER (Basic Encoding Rules) to be used to mean the same thing, though this is not the case.
BER was created in the early 1980s and is used in a wide range of applications, such as Simple Network Management Protocol (SNMP) for management of the Internet; Message Handling Services (MHS) for exchange of electronic mail and TSAPI for control of telephone/computer interactions.
www.oss.com /asn1/rules.html   (406 words)

  
 BER - Basic Encoding Rules, Bit Error Rate
Basic Encoding Rules is not the only word formed from BER.
Rules for encoding data units described in the ISO ASN.1 standard.
Standard rules for encoding data units described in ASN.1.
www.auditmypc.com /acronym/BER.asp   (419 words)

  
 Introduction to ASN.1 and the Packed Encoding Rules
The Basic Encoding Rules (BER) were the orignal rules for taking an ASN.1 data type, and turning it into a sequence of bits and bytes.
Each item is encoded as a tag, indicating what type it is, a length indicating the size of the object, and a value, which contains the actual contents of the object.
PER encodings are not always aligned on byte boundaries- if the 'aligned' variant of the rules is used, then strings *will* be aligned - otherwise the encoding is treated as a string of bits, allowing things like booleans and small integers to be squished together in one byte.
www.w3.org /Protocols/HTTP-NG/asn1.html   (697 words)

  
 Security Glossary   (Site not responding. Last check: 2007-10-09)
BER is a set of rules for encoding ASN.1 objects into a sequence of octets.
DER is a set of rules for encoding ASN.1 objects into a sequence of octets.
DER is a subset of BER, and as opposed to BER, using DER results in a unique encoding for all ASN.1 values.
www.cs.indiana.edu /~chiuk/security/glossary   (329 words)

  
 Basic Encoding Rules
Basic Encoding Rules or BER is the transfer syntax for SNMP and LDAP.
BER and ASN.1 were designed by the same people (not network administrators alone) and hence go hand in hand.
In a situation where the length of the datatype exceeds one byte, the byte succeeding the data-type declaration has '1' in the 8th field followed by the length of the succeeding bytes which are used to represent the datatype.
www.vijaymukhi.com /vmis/ber.htm   (631 words)

  
 Project 521_1, ISO/IEC 8825-1:1998   (Site not responding. Last check: 2007-10-09)
International Standard specifies a set of basic encoding rules that may be used to derive the specification of a transfer syntax for values of types defined using the notation specified in ITU-T Rec.
These basic encoding rules are also applied for decoding such a transfer syntax in order to identify the data values being transferred.
These encoding rules are used at the time of communication (by the presentation service provider when required by a presentation context).
www.ncits.org /scopes/521_1.htm   (140 words)

  
 XGEN: A Brief Introduction to ASN.1 and BER
BER (pronounced "burr") is the common name for the Basic Encoding Rules of ASN.1.
BER is one set of rules for encoding ASN.1 data to a stream of octets that can be transmitted over a communications link.
Each encoding method has its application, but BER tends to be the encoding method most commonly used and most commonly talked about.
support.microsoft.com /default.aspx?scid=kb;en-us;252648   (990 words)

  
 search.cpan.org: Convert::BER - ASN.1 Basic Encoding Rules
As these are packed into 8-bit octets when encoding and there may not be a multiple of 8 bits to be encoded, trailing padding bits are added in the encoding.
It is sometimes useful to construct or deconstruct BER encodings in several pieces.
In BER everything being encoded has a tag, a length, and a value.
search.cpan.org /dist/Convert-BER/BER.pod   (2796 words)

  
 ber_put_set(3): LBER simplified Basic Encoding ... - Linux man page
The encoding rules are the same as BER, except that only definite form lengths are used, and bitstrings and octet strings are always encoded in primitive form.
The ber_printf() routine is used to encode a BER element in much the same way that sprintf(3) works.
One important difference, though, is that some state information is kept with the ber parameter so that multiple calls can be made to ber_printf() to append things to the end of the BER element.
www.die.net /doc/linux/man/man3/ber_put_set.3.html   (812 words)

  
 Cover Pages: XML Encoding Rules for ASN.1 (XER)
When BER (Basic Encoding Rules) is applied to the ASN.1 expressions, data structures are encoded as octets in the form of tag, length, and value (or an indefinite length value is delimited by an end-tag).
The task of defining a standard set of rules to achieve lossless and reversible transform between ASN.1 and XML is feasible because of the similarity in how each represents data structures: XML provides a facility for representing character string data structures.
XML defines markup rules in which a data structure is encoded as a tag, value, and end-tag.
xml.coverpages.org /xer.html   (1920 words)

  
 Understanding OSI - Chapter 7
In this case, the encoding rules may have been designed so that, without any knowledge of the type used to define the abstract syntax, the end of each bit-pattern can be determined using only a knowledge of the encoding rules themselves.
Such encoding rules were considered in the past to produce self-delimiting encodings, but it is important here to note that such encodings are only "self-delimiting" if the process trying to delimit them does indeed have full knowledge of the applicable encoding rules.
These encodings for each presentation data value in the list are then appended to each other, and the whole sequence has a further length count placed in front of it, producing the set of octets that forms the Session Service user data.
www.isi.salford.ac.uk /books/osi/chap7b.htm   (3381 words)

  
 8. Serialization using the Basic Encoding Rules   (Site not responding. Last check: 2007-10-09)
When encoding the length field, only the definite form is used; use of the indefinite form encoding is prohibited.
When encoding the value field, the primitive form shall be used for all simple types, i.e., INTEGER, OCTET STRING, and OBJECT IDENTIFIER (either IMPLICIT or explicit).
The constructed form of encoding shall be used only for structured types, i.e., a SEQUENCE or an IMPLICIT SEQUENCE.
www.freesoft.org /CIE/RFC/1906/22.htm   (140 words)

  
 Man Page: ber_encode(3ldap)   (Site not responding. Last check: 2007-10-09)
The version of BER these functions support is the one defined for the LDAP protocol.
In addition, these lightweight BER functions restrict tags and class to fit in a single octet (this means the actual tag must be less than 31).
The ber_alloc function is used to allocate a new BER element.
www.cse.msu.edu /cgi-bin/man2html?ber_encode?3LDAP?/usr/man   (692 words)

  
 Publication Details - AS/NZS 8825.1:1998 Information technology - ASN.1 encoding rules - Specification of basic ...   (Site not responding. Last check: 2007-10-09)
This Recommendation International Standard specifies a set of basic encoding rules that may be used to derive the specification of a transfer syntax for values of types defined using the notation specified in ITU-T Rec.
Specifies the definition of encoding rules that may be applied to values of types defined using the ASN.1 notation.
It is implicit in the specification of these encoding rules that they are also to be used for decoding.
www.standards.com.au /Catalogue/script/Details.asp?DocN=stds000017283   (515 words)

  
 basis
BASIC exists in many dialects, and is popular on microcomputers with sound and graphics support.
A novice can write short BASIC programs (on the order of 10-20 lines) very easily; writing anything longer is (a) very painful, and (b) encourages bad habits that will make it harder to use more powerful languages well.
The version of the Basic programming language which comes on ROM in Acorn's RISC computers: the Archimedes range and the RiscPC.
www.linuxguruz.com /foldoc/foldoc.php?basis   (1536 words)

  
 Debian -- libber0
This library is an implementation of the ITU-T X.690 specification of Basic Encoding Rules (BER).
BER is a language used to encode data so that it can be transferred and be interpreted by different hosts in a platform independent manner.
BER is is used to encode data in SNMP and LDAP and probably other popular protocols as well.
packages.debian.org /unstable/libs/libber0.html   (150 words)

  
 UNIX man pages : ber_alloc (3LDAP)   (Site not responding. Last check: 2007-10-09)
In addition, these lightweight BER func- tions restrict tags and class to fit in a single octet (this means the actual tag must be less than 31).
Normally, the only functions that need be called by an application are ber_alloc(), to allocate a BER element, and ber_printf() to do the actual encoding.
The ber_printf() function is used to encode a BER element in much the same way that sprintf(3S) works.
www.pmel.noaa.gov /epic-bin/man-cgi?ber_alloc+3LDAP+1234   (755 words)

  
 Basic Encoding Rules - OneLook Dictionary Search   (Site not responding. Last check: 2007-10-09)
Basic Encoding Rules : Free On-line Dictionary of Computing [home, info]
Basic Encoding Rules : CCI Computer [home, info]
Basic Encoding Rules : Dictionary of Computing and Digital Media [home, info]
onelook.com /cgi-bin/cgiwrap/bware/dofind.cgi?word=Basic+Encoding+Rules   (108 words)

  
 ISO 7816-4 Smart card standard, ISO7816 part 4 Annex D: Use of Basic Encoding Rules ASN.1
In short form, the length field consists of a single byte where the bit B8 shall be set to 0 and the bits B7-B1 shall encode an integer equal to the number of bytes in the value field.
Any length from 0-127 can thus be encoded by 1 byte.
In long form, the length field consists of a leading byte where the bit B8 shall be set to 1 and the B7-B1 shall not be all equal, thus encoding a positive integer equal to the number of subsequent bytes in the length field.
www.cardwerk.com /smartcards/smartcard_standard_ISO7816-4_annex-d.aspx   (563 words)

  
 Project 520 - ISO/IEC FDIS 8825-1, Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules ...   (Site not responding. Last check: 2007-10-09)
Project 520 - ISO/IEC FDIS 8825-1, Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
specifies a set of basic encoding rules that may be used to derive the specification of a transfer syntax for values of types defined using the notation specified in ITU-T Rec.X.680
www.ncits.org /scopes/520_8825_1.htm   (86 words)

  
 The Design and Implementation of an ASN.1-C Compiler   (Site not responding. Last check: 2007-10-09)
Abstract syntax notation one (ASN.1) has been widely used in international standard specification: its transfer-syntax, the basic encoding rules (BER), is used as the external data representation.
The ED library includes a number of encoding and decoding routines that may be used as primitive functions to compose encoders and decoders for arbitrarily complicated ASN.1 data types.
Based on the ED library an ASN.1-C compiler, called CASN1, is designed and implemented to free the protocol implementers from the arduous work of translating protocol-defined data-types and constructing their encoders and decoders.
csdl2.computer.org /persagen/DLAbsToc.jsp?resourcePath=/dl/trans/ts/&toc=comp/trans/ts/1990/10/extoc.xml&DOI=10.1109/32.60300   (687 words)

  
 OSS Nokalva - ASN.1 Courses
The Basic ASN.1 course provides an introduction to ASN.1 and the Basic Encoding Rules (BER).
A prerequisite for the Advanced Course is the Basic Course or prior experience with ASN.1 or with the OSS ASN.1 Tools.
The 3-day training is a combination of the Basic and Advanced courses encompassing ASN.1 concepts, techniques, Basic Encoding Rules (BER), Packed Encoding Rules and Distinguished Encoding Rules.
www.oss.com /services/training.html   (303 words)

  
 basis - DicionĂ¡rio internet
Temas relacionados: bash « BASIC « Basic Assembly Language « BASIC AUTOCODER » Basic COBOL » Basic Encoding Rules » Basic Fortran
Temas relacionados: Basic Encoding Rules « Basic Fortran « Basic Input/Output System « Basic JOVIAL » Basic Language for Implementation of System Software » Basic Multilingual Plane » Basic Object Adapter
The version of the Basic programming language which comes on ROM in Acorn's RISC computers: the Archimedes range and the Risc PC.
www.hostgold.com.br /hospedagem-sites/o_que_e/basis   (1537 words)

  
 UNIX man pages : ber_start_seq (3LDAP)
See ber_decode(3LDAP) for SunOS 5.9 Last change: 27 Jan 2002 1 LDAP Library Functions ber_encode(3LDAP) details on the corresponding decoding functions.
In general, these functions return the length of the element encoded, or -1 if an error occurred.
Information Processing - Open Systems Interconnection - Model and Notation - Service Definition - Specification of Basic Encoding Rules for Abstract Syntax Notation One, SunOS 5.9 Last change: 27 Jan 2002 4 LDAP Library Functions ber_encode(3LDAP) International Organization for Standardization, Interna- tional Standard 8825.
bama.ua.edu /cgi-bin/man-cgi?ber_start_seq+3LDAP   (704 words)

  
 Zvon - RFC 1906 [Transport Mappings for Version 2 of the Simple Network Management Protocol (SNMPv2)] - Serialization ...
As an example of applying the Basic Encoding Rules, suppose one wanted to encode an instance of the GetBulkRequest-PDU [1]:
Applying the BER, this would be encoded (in hexadecimal) as:
Note that the initial SEQUENCE is not encoded using the minimum number of length octets.
www.zvon.org /tmRFC/RFC1906/Output/chapter8.html   (316 words)

  
 Netscape Directory SDK for Java: Source Code Documentation
In the LDAP protocol, requests and responses are encoded using the Basic Encoding Rules (BER).
The SDK source code include classes for encoding and decoding data, according to these rules.
These classes and methods are responsible for generating and sending requests to an LDAP server and for handling results returned from an LDAP server.
www.mozilla.org /directory/javasourcedocs.html   (262 words)

  
 BasicEncodingRules
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dictionary-x.com /BasicEncodingRules.html   (270 words)

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