Asn Go Reference Documentation

Asn

Current Version: 9.5.0.80

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

Object Creation

asn := chilkat.NewAsn()
...
asn.DisposeAsn()

Properties

BoolValue
func (asn *Asn) BoolValue() bool
func (asn *Asn) SetBoolValue(b bool)
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
func (asn *Asn) Constructed() bool
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
func (asn *Asn) ContentStr() string
func (asn *Asn) SetContentStr(s string)
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
func (asn *Asn) DebugLogFilePath() string
func (asn *Asn) SetDebugLogFilePath(s string)

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

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IntValue
func (asn *Asn) IntValue() int
func (asn *Asn) SetIntValue(v int)
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
func (asn *Asn) LastErrorHtml() string

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorText
func (asn *Asn) LastErrorText() string

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorXml
func (asn *Asn) LastErrorXml() string

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastMethodSuccess
func (asn *Asn) LastMethodSuccess() bool
func (asn *Asn) SetLastMethodSuccess(b bool)
Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of true indicates success, a value of false indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = true and failure = false.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to true. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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NumSubItems
func (asn *Asn) NumSubItems() int
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
func (asn *Asn) Tag() string
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
func (asn *Asn) TagValue() int
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
func (asn *Asn) VerboseLogging() bool
func (asn *Asn) SetVerboseLogging(b bool)

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
func (asn *Asn) Version() string

Version of the component/library, such as "9.5.0.63"

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Methods

AppendBigInt
func (asn *Asn) AppendBigInt(encodedBytes string, encoding string) bool
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
func (asn *Asn) AppendBits(encodedBytes string, encoding string) bool
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
func (asn *Asn) AppendBool(value bool) bool
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
func (asn *Asn) AppendContextConstructed(tag int) bool
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
func (asn *Asn) AppendContextPrimitive(tag int, encodedBytes string, encoding string) bool
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
func (asn *Asn) AppendInt(value int) bool
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
func (asn *Asn) AppendNull() bool
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
func (asn *Asn) AppendOctets(encodedBytes string, encoding string) bool
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
func (asn *Asn) AppendOid(oid string) bool
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
func (asn *Asn) AppendSequence() bool
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
func (asn *Asn) AppendSequence2() bool
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
func (asn *Asn) AppendSequenceR() *Asn
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 nil on failure

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AppendSet
func (asn *Asn) AppendSet() bool
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
func (asn *Asn) AppendSet2() bool
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
func (asn *Asn) AppendSetR() *Asn
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 nil on failure

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AppendString
func (asn *Asn) AppendString(strType string, value string) bool
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
func (asn *Asn) AppendTime(timeFormat string, dateTimeStr string) bool
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
func (asn *Asn) AsnToXml() *string
Introduced in version 9.5.0.49

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

Returns nil on failure

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DeleteSubItem
func (asn *Asn) DeleteSubItem(index int) bool
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
func (asn *Asn) GetBinaryDer() []byte
Introduced in version 9.5.0.49

Returns the ASN.1 in binary DER form.

Returns nil on failure

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GetEncodedContent
func (asn *Asn) GetEncodedContent(encoding string) *string
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 nil on failure

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GetEncodedDer
func (asn *Asn) GetEncodedDer(encoding string) *string
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 nil on failure

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GetLastSubItem
func (asn *Asn) GetLastSubItem() *Asn
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 nil on failure

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GetSubItem
func (asn *Asn) GetSubItem(index int) *Asn
Introduced in version 9.5.0.49

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

Returns nil on failure

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LoadAsnXml
func (asn *Asn) LoadAsnXml(xmlStr string) bool
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
func (asn *Asn) LoadBd(bd *BinData) bool
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
func (asn *Asn) LoadBinary(derBytes []byte) bool
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
func (asn *Asn) LoadBinaryFile(path string) bool
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
func (asn *Asn) LoadEncoded(asnContent string, encoding string) bool
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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SaveLastError
func (asn *Asn) SaveLastError(path string) bool

Saves the last-error information (the contents of LastErrorXml) to an XML formatted file.

Returns true for success, false for failure.

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SetEncodedContent
func (asn *Asn) SetEncodedContent(encodedBytes string, encoding string) bool
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
func (asn *Asn) WriteBd(bd *BinData) bool
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
func (asn *Asn) WriteBinaryDer(path string) bool
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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