Asn Unicode C Reference Documentation

Asn

Current Version: 10.1.2

For creating, loading, parsing, converting, and saving ASN.1

Create/Dispose

HCkAsnW instance = CkAsnW_Create();
// ...
CkAsnW_Dispose(instance);
HCkAsnW CkAsnW_Create(void);

Creates an instance of the HCkAsnW object and returns a handle ("void *" pointer). The handle is passed in the 1st argument for the functions listed on this page.

void CkAsnW_Dispose(HCkAsnW handle);

Objects created by calling CkAsnW_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 CkAsnW_Dispose.

Properties

BoolValue
BOOL CkAsnW_getBoolValue(HCkAsnW cHandle);
void CkAsnW_putBoolValue(HCkAsnW cHandle, BOOL newVal);
Introduced in version 9.5.0.49

The ASN.1 item's boolean value if it is a boolean item.

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Constructed
BOOL CkAsnW_getConstructed(HCkAsnW cHandle);
Introduced in version 9.5.0.49

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).

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ContentStr
void CkAsnW_getContentStr(HCkAsnW cHandle, HCkString retval);
void CkAsnW_putContentStr(HCkAsnW cHandle, const wchar_t *newVal);
const wchar_t *CkAsnW_contentStr(HCkAsnW cHandle);
Introduced in version 9.5.0.49

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).

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DebugLogFilePath
void CkAsnW_getDebugLogFilePath(HCkAsnW cHandle, HCkString retval);
void CkAsnW_putDebugLogFilePath(HCkAsnW cHandle, const wchar_t *newVal);
const wchar_t *CkAsnW_debugLogFilePath(HCkAsnW 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.

More Information and Examples
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IntValue
int CkAsnW_getIntValue(HCkAsnW cHandle);
void CkAsnW_putIntValue(HCkAsnW cHandle, int newVal);
Introduced in version 9.5.0.49

The ASN.1 item's integer value if it is a small integer item.

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LastErrorHtml
void CkAsnW_getLastErrorHtml(HCkAsnW cHandle, HCkString retval);
const wchar_t *CkAsnW_lastErrorHtml(HCkAsnW 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.

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LastErrorText
void CkAsnW_getLastErrorText(HCkAsnW cHandle, HCkString retval);
const wchar_t *CkAsnW_lastErrorText(HCkAsnW 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.

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LastErrorXml
void CkAsnW_getLastErrorXml(HCkAsnW cHandle, HCkString retval);
const wchar_t *CkAsnW_lastErrorXml(HCkAsnW 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.

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LastMethodSuccess
BOOL CkAsnW_getLastMethodSuccess(HCkAsnW cHandle);
void CkAsnW_putLastMethodSuccess(HCkAsnW 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.

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NumSubItems
int CkAsnW_getNumSubItems(HCkAsnW cHandle);
Introduced in version 9.5.0.49

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.

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Tag
void CkAsnW_getTag(HCkAsnW cHandle, HCkString retval);
const wchar_t *CkAsnW_tag(HCkAsnW cHandle);
Introduced in version 9.5.0.49

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
bmpString

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TagValue
int CkAsnW_getTagValue(HCkAsnW cHandle);
Introduced in version 9.5.0.49

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)

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VerboseLogging
BOOL CkAsnW_getVerboseLogging(HCkAsnW cHandle);
void CkAsnW_putVerboseLogging(HCkAsnW 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.

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Version
void CkAsnW_getVersion(HCkAsnW cHandle, HCkString retval);
const wchar_t *CkAsnW_version(HCkAsnW cHandle);

Version of the component/library, such as "10.1.0"

More Information and Examples
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Methods

AppendBigInt
BOOL CkAsnW_AppendBigInt(HCkAsnW cHandle, const wchar_t *encodedBytes, const wchar_t *encoding);
Introduced in version 9.5.0.49

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.

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AppendBits
BOOL CkAsnW_AppendBits(HCkAsnW cHandle, const wchar_t *encodedBytes, const wchar_t *encoding);
Introduced in version 9.5.0.49

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.

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AppendBool
BOOL CkAsnW_AppendBool(HCkAsnW cHandle, BOOL value);
Introduced in version 9.5.0.49

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.

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AppendContextConstructed
BOOL CkAsnW_AppendContextConstructed(HCkAsnW cHandle, int tag);
Introduced in version 9.5.0.50

Appends an ASN.1 context-specific constructed item to the caller's sub-items.

Returns TRUE for success, FALSE for failure.

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AppendContextPrimitive
BOOL CkAsnW_AppendContextPrimitive(HCkAsnW cHandle, int tag, const wchar_t *encodedBytes, const wchar_t *encoding);
Introduced in version 9.5.0.50

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.

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AppendInt
BOOL CkAsnW_AppendInt(HCkAsnW cHandle, int value);
Introduced in version 9.5.0.49

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.

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AppendNull
BOOL CkAsnW_AppendNull(HCkAsnW cHandle);
Introduced in version 9.5.0.49

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.

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AppendOctets
BOOL CkAsnW_AppendOctets(HCkAsnW cHandle, const wchar_t *encodedBytes, const wchar_t *encoding);
Introduced in version 9.5.0.49

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.

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AppendOid
BOOL CkAsnW_AppendOid(HCkAsnW cHandle, const wchar_t *oid);
Introduced in version 9.5.0.49

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.

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AppendSequence
BOOL CkAsnW_AppendSequence(HCkAsnW cHandle);
Introduced in version 9.5.0.49

Appends an ASN.1 sequence item to the caller's sub-items.

Returns TRUE for success, FALSE for failure.

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AppendSequence2
BOOL CkAsnW_AppendSequence2(HCkAsnW cHandle);
Introduced in version 9.5.0.50

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.

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AppendSequenceR
HCkAsnW CkAsnW_AppendSequenceR(HCkAsnW cHandle);
Introduced in version 9.5.0.50

Appends an ASN.1 sequence item to the caller's sub-items, and returns the newly appended sequence item.

Returns NULL on failure

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AppendSet
BOOL CkAsnW_AppendSet(HCkAsnW cHandle);
Introduced in version 9.5.0.49

Appends an ASN.1 set item to the caller's sub-items.

Returns TRUE for success, FALSE for failure.

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AppendSet2
BOOL CkAsnW_AppendSet2(HCkAsnW cHandle);
Introduced in version 9.5.0.50

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.

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AppendSetR
HCkAsnW CkAsnW_AppendSetR(HCkAsnW cHandle);
Introduced in version 9.5.0.50

Appends an ASN.1 set item to the caller's sub-items, and returns the newly appended set item.

Returns NULL on failure

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AppendString
BOOL CkAsnW_AppendString(HCkAsnW cHandle, const wchar_t *strType, const wchar_t *value);
Introduced in version 9.5.0.49

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.

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AppendTime
BOOL CkAsnW_AppendTime(HCkAsnW cHandle, const wchar_t *timeFormat, const wchar_t *dateTimeStr);
Introduced in version 9.5.0.49

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.

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AsnToXml
BOOL CkAsnW_AsnToXml(HCkAsnW cHandle, const wchar_t *outStr);
const wchar_t *CkAsnW_asnToXml(HCkAsnW cHandle);
Introduced in version 9.5.0.49

Converts ASN.1 to XML and returns the XML string.

Returns TRUE for success, FALSE for failure.

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DeleteSubItem
BOOL CkAsnW_DeleteSubItem(HCkAsnW cHandle, int index);
Introduced in version 9.5.0.49

Discards the Nth sub-item. (The 1st sub-item is at index 0.)

Returns TRUE for success, FALSE for failure.

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GetBinaryDer
BOOL CkAsnW_GetBinaryDer(HCkAsnW cHandle, const unsigned char * outBytes);
Introduced in version 9.5.0.49

Returns the ASN.1 in binary DER form.

Returns TRUE for success, FALSE for failure.

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GetEncodedContent
BOOL CkAsnW_GetEncodedContent(HCkAsnW cHandle, const wchar_t *encoding, const wchar_t *outStr);
const wchar_t *CkAsnW_getEncodedContent(HCkAsnW cHandle, const wchar_t *encoding);
Introduced in version 9.5.0.49

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.

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GetEncodedDer
BOOL CkAsnW_GetEncodedDer(HCkAsnW cHandle, const wchar_t *encoding, const wchar_t *outStr);
const wchar_t *CkAsnW_getEncodedDer(HCkAsnW cHandle, const wchar_t *encoding);
Introduced in version 9.5.0.49

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.

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GetLastSubItem
HCkAsnW CkAsnW_GetLastSubItem(HCkAsnW cHandle);
Introduced in version 9.5.0.49

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

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GetSubItem
HCkAsnW CkAsnW_GetSubItem(HCkAsnW cHandle, int index);
Introduced in version 9.5.0.49

Returns the Nth ASN.1 sub-item. The 1st sub-item is at index 0.

Returns NULL on failure

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LoadAsnXml
BOOL CkAsnW_LoadAsnXml(HCkAsnW cHandle, const wchar_t *xmlStr);
Introduced in version 9.5.0.49

Loads ASN.1 from the XML representation (such as that created by the AsnToXml method).

Returns TRUE for success, FALSE for failure.

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LoadBd
BOOL CkAsnW_LoadBd(HCkAsnW cHandle, HCkBinDataW bd);
Introduced in version 9.5.0.77

Loads ASN.1 from the binary DER contained in bd.

Returns TRUE for success, FALSE for failure.

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LoadBinary
BOOL CkAsnW_LoadBinary(HCkAsnW cHandle, HCkByteData derBytes);
Introduced in version 9.5.0.49

Loads ASN.1 from binary DER.

Returns TRUE for success, FALSE for failure.

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LoadBinaryFile
BOOL CkAsnW_LoadBinaryFile(HCkAsnW cHandle, const wchar_t *path);
Introduced in version 9.5.0.49

Loads ASN.1 from a binary DER file.

Returns TRUE for success, FALSE for failure.

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LoadEncoded
BOOL CkAsnW_LoadEncoded(HCkAsnW cHandle, const wchar_t *asnContent, const wchar_t *encoding);
Introduced in version 9.5.0.49

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.

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SetEncodedContent
BOOL CkAsnW_SetEncodedContent(HCkAsnW cHandle, const wchar_t *encodedBytes, const wchar_t *encoding);
Introduced in version 9.5.0.49

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.

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WriteBd
BOOL CkAsnW_WriteBd(HCkAsnW cHandle, HCkBinDataW bd);
Introduced in version 9.5.0.77

Appends the ASN.1 in binary DER format to bd.

Returns TRUE for success, FALSE for failure.

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WriteBinaryDer
BOOL CkAsnW_WriteBinaryDer(HCkAsnW cHandle, const wchar_t *path);
Introduced in version 9.5.0.49

Writes the ASN.1 in binary DER form to a file.

Returns TRUE for success, FALSE for failure.

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