CkDkim PHP Extension Reference Documentation

CkDkim

Current Version: 9.5.0.75

DomainKeys API for creating and verifying DKIM-Signature and DomainKey-Signature MIME (email) header fields. This API is included with the "Chilkat MIME" license. ("Chilkat MIME" may be referred to as "Chilkat S/MIME" on some chilkatsoft.com web pages. They are the same product.)

Object Creation

$obj = new CkDkim();

Properties

AbortCurrent
bool get_AbortCurrent()
void put_AbortCurrent(bool boolVal);
Introduced in version 9.5.0.58

When set to true, causes the currently running method to abort. Methods that always finish quickly (i.e.have no length file operations or network communications) are not affected. If no method is running, then this property is automatically reset to false when the next method is called. When the abort occurs, this property is reset to false. Both synchronous and asynchronous method calls can be aborted. (A synchronous method call could be aborted by setting this property from a separate thread.)

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DebugLogFilePath
string debugLogFilePath();
void put_DebugLogFilePath(string strVal);

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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DkimAlg
string dkimAlg();
void put_DkimAlg(string strVal);

The signing algorithm to be used in creating the DKIM-Signature. Possible values are "rsa-sha256" and "rsa-sha1". The default value is "rsa-sha256".

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DkimBodyLengthCount
int get_DkimBodyLengthCount()
void put_DkimBodyLengthCount(int intVal);

Optional body length count to set a maximum number of body bytes to be hashed when creating the DKIM-Signature field. The default value is 0, indicating that the entire body should be hashed.

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DkimCanon
string dkimCanon();
void put_DkimCanon(string strVal);

Canonicalization algorithm to be used for both header and body when creating the DKIM-Signature. Possible values are "simple" and "relaxed". The default value is "relaxed".

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DkimDomain
string dkimDomain();
void put_DkimDomain(string strVal);

The domain name of the signing domain when creating the DKIM-Signature.

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DkimHeaders
string dkimHeaders();
void put_DkimHeaders(string strVal);

A colon-separated list of header field names that identify headers presented to the signing algorithm when creating the DKIM-Signature. The default value is: "mime-version:date:message-id:subject:from:to:content-type".

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DkimSelector
string dkimSelector();
void put_DkimSelector(string strVal);

The selector to be used to form the DNS query for the public key. This property applies to creating a DKIM-Signature. For example, if the selector is "reykjavik" and the domain is "example-code.com", then the DNS query would be for "reykjavik._domainkey.example-code.com".

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DomainKeyAlg
string domainKeyAlg();
void put_DomainKeyAlg(string strVal);

The signing algorithm to be used in creating the DomainKey-Signature. The only possible value is "rsa-sha1". The default value is "rsa-sha1".

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DomainKeyCanon
string domainKeyCanon();
void put_DomainKeyCanon(string strVal);

Canonicalization algorithm to be used for when creating the DomainKey-Signature. Possible values are "simple" and "nofws". The default value is "nofws".

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DomainKeyDomain
string domainKeyDomain();
void put_DomainKeyDomain(string strVal);

The domain name of the signing domain when creating the DomainKey-Signature.

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DomainKeyHeaders
string domainKeyHeaders();
void put_DomainKeyHeaders(string strVal);

A colon-separated list of header field names that identify headers presented to the signing algorithm when creating the DomainKey-Signature. The default value is: "mime-version:date:message-id:subject:from:to:content-type".

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DomainKeySelector
string domainKeySelector();
void put_DomainKeySelector(string strVal);

The selector to be used to form the DNS query for the public key. This property applies to creating a DomainKey-Signature. For example, if the selector is "reykjavik" and the domain is "example-code.com", then the DNS query would be for "reykjavik._domainkey.example-code.com".

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LastErrorHtml
(read-only)
string lastErrorHtml();

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
(read-only)
string lastErrorText();

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
(read-only)
string lastErrorXml();

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
bool get_LastMethodSuccess()
void put_LastMethodSuccess(bool boolVal);
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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Utf8
bool get_Utf8()
void put_Utf8(bool boolVal);

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.

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VerboseLogging
bool get_VerboseLogging()
void put_VerboseLogging(bool boolVal);

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
(read-only)
string version();

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

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Methods

DkimSign
bool DkimSign(CkBinData mimeData);
Introduced in version 9.5.0.71

Constructs and prepends a DKIM-Signature header to the MIME passed in mimeData. Prior to calling this method, your program must set both the DkimDomain and DkimSelector properties, and it must load a private key by calling SetDkimPrivateKey.

Returns true for success, false for failure.

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DkimVerify
bool DkimVerify(int sigIndex, CkBinData mimeData);
Introduced in version 9.5.0.71

Verifies the Nth DKIM-Signature header in the mimeData. (In most cases, there is only one signature.) The 1st signature is at sigIndex 0.

Important: Many anti-virus programs, such as AVG, will modify the MIME of an email as it is received. This will cause DKIM signature verification to fail because the body of the MIME is modified.

Returns true for success, false for failure.

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DomainKeySign
bool DomainKeySign(CkBinData mimeData);
Introduced in version 9.5.0.71

Constructs and prepends a DomainKey-Signature header to the MIME passed in mimeData. Prior to calling this method, your program must set both the DomainKeyDomain and DomainKeySelector properties, and it must load a private key by calling SetDomainKeyPrivateKey.

Returns true for success, false for failure.

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DomainKeyVerify
bool DomainKeyVerify(int sigIndex, CkBinData mimeData);
Introduced in version 9.5.0.71

Verifies the Nth DomainKey-Signature header in the mimeData. (In most cases, there is only one signature.) The 1st signature is at sigIndex 0.

Important: Many anti-virus programs, such as AVG, will modify the MIME of an email as it is received. This will cause DomainKey signature verification to fail because the body of the MIME is modified.

Returns true for success, false for failure.

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LoadPublicKey
bool LoadPublicKey(string selector, string domain, string publicKey);

Caches a public key to be used for verifying DKIM and DomainKey signatures for a given selector and domain. The publicKey is a string containing an RSA public key in any text format, such as XML, PEM, etc. This method will automatically detect the format and load the public key correctly. This method is useful for testing DKIM and DomainKey verification when your public key has not yet been installed in DNS.

Returns true for success, false for failure.

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LoadPublicKeyFile
bool LoadPublicKeyFile(string selector, string domain, string publicKeyFilepath);

Caches a public key to be used for verifying DKIM and DomainKey signatures for a given selector and domain. The publicKeyFilepath is a filepath of an RSA public key in any format. This method will automatically detect the format and load the public key correctly. This method is useful for testing DKIM and DomainKey verification when your public key has not yet been installed in DNS.

Returns true for success, false for failure.

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NumDkimSignatures
int NumDkimSignatures(CkByteData mimeData);

Returns the number of DKIM-Signature header fields found in mimeData.

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NumDomainKeySignatures
int NumDomainKeySignatures(CkByteData mimeData);

Returns the number of DomainKey-Signature header fields found in mimeData.

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PrefetchPublicKey
bool PrefetchPublicKey(string selector, string domain);

Useful if your application is going to verify many emails from a single domain (or a few domains). This eliminates the need to do a DNS lookup to fetch the public key each time an email's DKIM or DomainKey signature is verified.

This method may be called multiple times -- once for each selector/domain to be pre-fetched. The verify methods (VerifyDkimSignature and VerifyDomainKeySignature) will use a pre-fetched key if the selector and domain match.

Returns true for success, false for failure.

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PrefetchPublicKeyAsync (1)
CkTask PrefetchPublicKeyAsync(string selector, string domain);

Creates an asynchronous task to call the PrefetchPublicKey method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

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SaveLastError
bool SaveLastError(string path);

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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SetDkimPrivateKey
bool SetDkimPrivateKey(CkPrivateKey privateKey);
Introduced in version 9.5.0.71

Sets the private key file to be used for creating a DKIM-Signature.

Returns true for success, false for failure.

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SetDomainKeyPrivateKey
bool SetDomainKeyPrivateKey(CkPrivateKey privateKey);
Introduced in version 9.5.0.71

Sets the private key file to be used for creating a DomainKey-Signature.

Returns true for success, false for failure.

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UnlockComponent
bool UnlockComponent(string unlockCode);

Unlocks the component allowing for the full functionality to be used. If this method unexpectedly returns false, examine the contents of the LastErrorText property to determine the reason for failure.

Returns true for success, false for failure.

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