Asn Chilkat2 PHP Reference Documentation
Asn
Current Version: 11.7.0
Markdown version of this page for AI tools (v 11.7.0) · all AI docs
Chilkat.Asn
Load ASN.1 from binary DER bytes, encoded text such as Base64 or hex,
files, or existing
Read the item tag, tag value, constructed/primitive state, sub-item
count, string content, boolean value, or integer value.
Append constructed
Add booleans, integers, big integers, bit strings, octet strings, OIDs,
strings, times, null values, and encoded byte content.
Add context-specific primitive or constructed items when working with
ASN.1 formats that use tagged application-specific structures.
Convert ASN.1 to XML for inspection or editing, load ASN.1 back from XML,
and output the result as binary or encoded DER.
Load, inspect, build, edit, and encode ASN.1 structures in DER or XML form.
Chilkat.Asn represents an ASN.1 item and its optional child
items. It can load ASN.1 from binary DER, encoded DER strings, files, or
BinData; expose tags, tag values, primitive content, boolean
and integer values, and child counts; build constructed structures such as
SEQUENCE and SET; append common primitive types
such as booleans, integers, big integers, bit strings, octets, OIDs, strings,
times, null values, and context-specific items; convert ASN.1 to XML; reload
from that XML form; and write the final structure back to DER.
Load DER data
BinData objects.
Inspect ASN.1 items
Build sequences and sets
SEQUENCE and SET items,
then add child ASN.1 values beneath them.
Append primitive values
Context-specific tags
DER and XML conversion
LoadBinary, LoadEncoded,
LoadBd, or LoadBinaryFile, inspect the tree with
Tag, Constructed, NumSubItems, and
GetSubItem, then extract primitive content or convert to XML
with AsnToXml. To create ASN.1, start with a constructed item,
append child values, and write the final DER with GetBinaryDer,
GetEncodedDer, WriteBd, or
WriteBinaryDer.
Object Creation
use Chilkat2\Asn;
try {
$asn = new Asn();
// ... use $asn ...
} catch (\Chilkat2\Exception $e) {
echo $e->getClass(), '::', $e->getMethod(), " failed\n";
echo $e->getMessage(), "\n"; // the LastErrorText of the failed call
}Creates the object. The optional array sets properties in order, as if assigned one by one (new Asn(['VerboseLogging' => true, 'RaiseError' => false])); an unknown or read-only name throws Error. The class is defined by the chilkat2 extension (extension=chilkat2 in php.ini): there is no PHP file to include.
There is no close(): PHP frees the object when its last reference goes (unset($asn), $asn = null, or the end of the function or request). Objects returned by methods are independent and freed the same way. The class may be extended (class MyAsn extends \Chilkat2\Asn); objects cannot be cloned or serialized.
When true (the default), a method that fails throws Chilkat2\Exception. When false, it returns false (or null) instead, and the reason is in LastErrorText. Objects returned by a method inherit the value of the object that returned them.
Errors
Chilkat2\Exception extends RuntimeException: getMessage() is the failed call's full LastErrorText, getClass() its class ('Chilkat2\Asn') and getMethod() the method name. The object remains usable. Methods that look something up and find nothing return null without throwing (each such method says so), methods that answer a question (HasMember, IsUnlocked, ...) return a plain bool, and property reads and writes do not throw for Chilkat reasons.
Misuse always throws, whatever RaiseError is: a wrong argument type is a TypeError (exact types under declare(strict_types=1)), a missing or extra argument an ArgumentCountError, a string containing a NUL byte or an out-of-range integer a ValueError, and an unknown property (properties are case-sensitive) or a write to a read-only one an Error. Named arguments work with the parameter names shown.
Strings are passed and returned as UTF-8; binary data is a PHP string of bytes. Unlocking: call (new \Chilkat2\GlobalSettings())->UnlockBundle('...') once at startup.
Properties
BoolValue
The ASN.1 item's boolean value if it is a boolean item.
topConstructed
true if this ASN.1 item is a constructed item. Sequence and Set items are constructed and can contain sub-items. All other tags (boolean, integer, octets, utf8String, etc.) are primitive (non-constructed).
ContentStr
The ASN.1 item's content if it is an ASN.1 string type (such as Utf8String, BmpString, PrintableString, VisibleString, T61String, IA5String, NumericString, or UniversalString).
topDebugLogFilePath
If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.
Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.
Possible causes of hangs include:
- A timeout property set to 0, indicating an infinite timeout.
- A hang occurring within an event callback in the application code.
- An internal bug in the Chilkat code causing the hang.
IntValue
The ASN.1 item's integer value if it is a small integer item.
topLastErrorHtml
Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastErrorText
Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
LastErrorXml
Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastMethodSuccess
Indicates the success or failure of the most recent method call: true means success, false means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages. Note: This property does not apply to methods that return integer values or to boolean-returning methods where the boolean does not indicate success or failure.
NumSubItems
The number of sub-items contained within this ASN.1 item. Only constructed items, such as Sequence and Set will contain sub-iitems. Primitive items such as OIDs, octet strings, integers, etc. will never contain sub-items.
topTag
The ASN.1 item's tag as a descriptive string. Possible values are:
boolean integer bitString octets null oid utf8String relativeOid sequence set numericString printableString t61String ia5String utcTime bmpStringtop
TagValue
The ASN.1 item's tag as a integer value. The integer values for possible tags are as follows:
boolean (1) integer (2) bitString (3) octets (4) null (5) oid (6) utf8String (12) relativeOid (13) sequence (16) set (17) numericString (18) printableString (19) t61String (20) ia5String (22) utcTime (23) bmpString (30)top
VerboseLogging
If set to true, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is false. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.
Version
Methods
AppendBigInt
Appends an ASN.1 integer, but one that is a big (huge) integer that is too large to be represented by an integer variable. The bytes composing the integer are passed in encoded string format (such as base64, hex, etc.). The byte order must be big-endian. The $encoding may be any of the following encodings: Base64, Hex, Base58, modBase64, Base32, UU, QP (for quoted-printable), URL (for url-encoding), Q, B, url_oath, url_rfc1738, url_rfc2396, and url_rfc3986. The $encoding name is case insensitive (for example, both Base64 and base64 are treated the same).
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendBits
Appends an ASN.1 bit string to the caller's sub-items. The bytes containing the bits are passed in encoded string format (such as base64, hex, etc.). The byte order must be big-endian (MSB first). The $encoding may be any of the following encodings: Base64, Hex, Base58, modBase64, Base32, UU, QP (for quoted-printable), URL (for url-encoding), Q, B, url_oath, url_rfc1738, url_rfc2396, and url_rfc3986. The $encoding name is case insensitive (for example, both Base64 and base64 are treated the same).
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendBool
Appends an ASN.1 boolean item to the caller's sub-items. Items may only be appended to constructed data types such as Sequence and Set.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendContextConstructed
Appends an ASN.1 context-specific constructed item to the caller's sub-items.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendContextPrimitive
Appends an ASN.1 context-specific primitive item to the caller's sub-items. The bytes are passed in encoded string format (such as base64, hex, etc.). The $encoding may be any of the following encodings: Base64, Hex, Base58, modBase64, Base32, UU, QP (for quoted-printable), URL (for url-encoding), Q, B, url_oath, url_rfc1738, url_rfc2396, and url_rfc3986. The $encoding name is case insensitive (for example, both Base64 and base64 are treated the same).
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendInt
Appends an ASN.1 integer item to the caller's sub-items. Items may only be appended to constructed data types such as Sequence and Set.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendNull
Appends an ASN.1 null item to the caller's sub-items. Items may only be appended to constructed data types such as Sequence and Set.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendOctets
Appends an ASN.1 octet string to the caller's sub-items. The bytes are passed in encoded string format (such as base64, hex, etc.). The $encoding may be any of the following encodings: Base64, Hex, Base58, modBase64, Base32, UU, QP (for quoted-printable), URL (for url-encoding), Q, B, url_oath, url_rfc1738, url_rfc2396, and url_rfc3986. The $encoding name is case insensitive (for example, both Base64 and base64 are treated the same).
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendOid
Appends an ASN.1 OID (object identifier) to the caller's sub-items. The OID is passed in string form, such as 1.2.840.113549.1.9.1.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendSequence
Appends an ASN.1 sequence item to the caller's sub-items.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendSequence2
Appends an ASN.1 sequence item to the caller's sub-items, and updates the internal reference to point to the newly appended sequence item.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendSequenceR
Appends an ASN.1 sequence item to the caller's sub-items, and returns the newly appended sequence item.
On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns null). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable. The returned object is new and independent of this one, and inherits its RaiseError.
AppendSet
Appends an ASN.1 set item to the caller's sub-items.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendSet2
Appends an ASN.1 set item to the caller's sub-items, and updates the internal reference to point to the newly appended set item.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendSetR
Appends an ASN.1 set item to the caller's sub-items, and returns the newly appended set item.
On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns null). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable. The returned object is new and independent of this one, and inherits its RaiseError.
AppendString
Appends a string item to the caller's sub-items. The $strType specifies the type of string to be added. It may be utf8, ia5, t61, printable, visible, numeric, universal, or bmp. The $value must conform to the ASN.1 restrictions imposed for a given string type. The utf8, bmp, and universal types have no restrictions on what characters are allowed. In general, unless a specific type of string is required, choose the utf8 type.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AppendTime
Appends a UTCTime item to the caller's sub-items. The $timeFormat specifies the format of the $dateTimeStr. It should be set to utc. (In the future, this method will be expanded to append GeneralizedTime items by using generalized for $timeFormat.) To append the current date/time, set $dateTimeStr equal to the empty string or the keyword now. Otherwise, the $dateTimeStr should be in the UTC time format YYMMDDhhmm[ss]Z or YYMMDDhhmm[ss](+|-)hhmm.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
AsnToXml
Converts ASN.1 to XML and returns the XML string.
On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns null). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
DeleteSubItem
Discards the Nth sub-item. (The 1st sub-item is at index 0.)
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
GetEncodedContent
Returns the content of the ASN.1 item in encoded string form. The $encoding may be any of the following encodings: Base64, Hex, Base58, modBase64, Base32, UU, QP (for quoted-printable), URL (for url-encoding), Q, B, url_oath, url_rfc1738, url_rfc2396, and url_rfc3986. The $encoding name is case insensitive (for example, both Base64 and base64 are treated the same).
On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns null). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
GetEncodedDer
Returns the binary DER in encoded string form. The $encoding indicates the encoding and can be base64, hex, uu, quoted-printable, base32, or modbase64.
On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns null). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
GetLastSubItem
Returns the last ASN.1 sub-item. This method can be called immediately after any Append* method to access the appended item.
On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns null). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable. The returned object is new and independent of this one, and inherits its RaiseError.
GetSubItem
Returns the Nth ASN.1 sub-item. The 1st sub-item is at index 0.
On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns null). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable. The returned object is new and independent of this one, and inherits its RaiseError.
LoadAsnXml
Loads ASN.1 from the XML representation (such as that created by the AsnToXml method).
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
LoadBd
Loads ASN.1 from the binary DER contained in $bd.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
LoadBinaryFile
Loads ASN.1 from a binary DER file.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
LoadEncoded
Loads ASN.1 from an encoded string. The $encoding can be base64, hex, uu, quoted-printable, base32, or modbase64.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
SetEncodedContent
Sets the content of this primitive ASN.1 item. The $encoding may be any of the following encodings: Base64, Hex, Base58, modBase64, Base32, UU, QP (for quoted-printable), URL (for url-encoding), Q, B, url_oath, url_rfc1738, url_rfc2396, and url_rfc3986. The $encoding name is case insensitive (for example, both Base64 and base64 are treated the same).
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
WriteBd
Appends the ASN.1 in binary DER format to $bd.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.
WriteBinaryDer
Writes the ASN.1 in binary DER form to a file.
Returns true on success. On failure it throws Chilkat2\Exception (or, with RaiseError set to false, returns false). $e->getMessage() (or the object's LastErrorText) explains why, and the object remains usable.