Asn C Reference Documentation
Asn
Current Version: 10.1.2
For creating, loading, parsing, converting, and saving ASN.1
Create/Dispose
HCkAsn instance = CkAsn_Create(); // ... CkAsn_Dispose(instance);
Creates an instance of the HCkAsn object and returns a handle ("void *" pointer). The handle is passed in the 1st argument for the functions listed on this page.
Objects created by calling CkAsn_Create must be freed by calling this method. A memory leak occurs if a handle is not disposed by calling this function. Also, any handle returned by a Chilkat "C" function must also be freed by the application by calling the appropriate Dispose method, such as CkAsn_Dispose.
Properties
BoolValue
void CkAsn_putBoolValue(HCkAsn cHandle, BOOL newVal);
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).
topContentStr
void CkAsn_putContentStr(HCkAsn cHandle, const char *newVal);
const char *CkAsn_contentStr(HCkAsn cHandle);
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
void CkAsn_putDebugLogFilePath(HCkAsn cHandle, const char *newVal);
const char *CkAsn_debugLogFilePath(HCkAsn cHandle);
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
void CkAsn_putIntValue(HCkAsn cHandle, int newVal);
The ASN.1 item's integer value if it is a small integer item.
topLastErrorHtml
const char *CkAsn_lastErrorHtml(HCkAsn cHandle);
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
const char *CkAsn_lastErrorText(HCkAsn cHandle);
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
const char *CkAsn_lastErrorXml(HCkAsn cHandle);
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
void CkAsn_putLastMethodSuccess(HCkAsn cHandle, BOOL newVal);
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.
topNumSubItems
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
Utf8
void CkAsn_putUtf8(HCkAsn cHandle, BOOL newVal);
When set to TRUE, all "const char *" arguments are interpreted as utf-8 strings. If set to FALSE (the default), then "const char *" arguments are interpreted as ANSI strings. Also, when set to TRUE, and Chilkat method returning a "const char *" is returning the utf-8 representation. If set to FALSE, all "const char *" return values are ANSI strings.
topVerboseLogging
void CkAsn_putVerboseLogging(HCkAsn cHandle, BOOL newVal);
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.
topVersion
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 for success, FALSE for failure.
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 for success, FALSE for failure.
topAppendBool
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 for success, FALSE for failure.
topAppendContextConstructed
Appends an ASN.1 context-specific constructed item to the caller's sub-items.
Returns TRUE for success, FALSE for failure.
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 for success, FALSE for failure.
topAppendInt
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 for success, FALSE for failure.
topAppendNull
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 for success, FALSE for failure.
topAppendOctets
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 for success, FALSE for failure.
topAppendOid
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 for success, FALSE for failure.
topAppendSequence
Appends an ASN.1 sequence item to the caller's sub-items.
Returns TRUE for success, FALSE for failure.
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 for success, FALSE for failure.
topAppendSequenceR
Appends an ASN.1 sequence item to the caller's sub-items, and returns the newly appended sequence item.
Returns NULL on failure
topAppendSet
Appends an ASN.1 set item to the caller's sub-items.
Returns TRUE for success, FALSE for failure.
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 for success, FALSE for failure.
topAppendSetR
Appends an ASN.1 set item to the caller's sub-items, and returns the newly appended set item.
Returns NULL on failure
topAppendString
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 for success, FALSE for failure.
topAppendTime
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 for success, FALSE for failure.
topAsnToXml
Converts ASN.1 to XML and returns the XML string.
Returns TRUE for success, FALSE for failure.
DeleteSubItem
Discards the Nth sub-item. (The 1st sub-item is at index 0.)
Returns TRUE for success, FALSE for failure.
topGetBinaryDer
GetEncodedContent
const char *CkAsn_getEncodedContent(HCkAsn cHandle, const char *encoding);
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).
Returns TRUE for success, FALSE for failure.
topGetEncodedDer
const char *CkAsn_getEncodedDer(HCkAsn cHandle, const char *encoding);
Returns the binary DER in encoded string form. The encoding indicates the encoding and can be "base64", "hex", "uu", "quoted-printable", "base32", or "modbase64".
Returns TRUE for success, FALSE for failure.
GetLastSubItem
Returns the last ASN.1 sub-item. This method can be called immediately after any Append* method to access the appended item.
Returns NULL on failure
topGetSubItem
Returns the Nth ASN.1 sub-item. The 1st sub-item is at index 0.
Returns NULL on failure
LoadAsnXml
Loads ASN.1 from the XML representation (such as that created by the AsnToXml method).
Returns TRUE for success, FALSE for failure.
LoadBd
Loads ASN.1 from the binary DER contained in bd.
Returns TRUE for success, FALSE for failure.
LoadBinary
LoadBinaryFile
Loads ASN.1 from a binary DER file.
Returns TRUE for success, FALSE for failure.
LoadEncoded
Loads ASN.1 from an encoded string. The encoding can be "base64", "hex", "uu", "quoted-printable", "base32", or "modbase64".
Returns TRUE for success, FALSE for failure.
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 for success, FALSE for failure.
topWriteBd
WriteBinaryDer
Writes the ASN.1 in binary DER form to a file.
Returns TRUE for success, FALSE for failure.