PublicKey Delphi DLL Reference Documentation

PublicKey

Current Version: 10.1.2

Contains an RSA, DSA, or ECC public key. Provides methods for importing and exporting to/from PEM, DER, PKCS8, PKCS1, and XML formats. Public keys can be imported/exported to both memory and files.

Create/Dispose

var
myObject: HCkPublicKey;

begin
myObject := CkPublicKey_Create();

// ...

CkPublicKey_Dispose(myObject);
end;
function CkPublicKey_Create: HCkPublicKey; stdcall;

Creates an instance of the HCkPublicKey object and returns a handle (i.e. a Pointer). The handle is passed in the 1st argument for the functions listed on this page.

procedure CkPublicKey_Dispose(handle: HCkPublicKey); stdcall;

Objects created by calling CkPublicKey_Create must be freed by calling this method. A memory leak occurs if a handle is not disposed by calling this function.

Properties

DebugLogFilePath
procedure CkPublicKey_getDebugLogFilePath(objHandle: HCkPublicKey; outPropVal: HCkString); stdcall;
procedure CkPublicKey_putDebugLogFilePath(objHandle: HCkPublicKey; newPropVal: PWideChar); stdcall;
function CkPublicKey__debugLogFilePath(objHandle: HCkPublicKey): PWideChar; stdcall;

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.

See the notes about PWideChar memory ownership and validity.

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Empty
function CkPublicKey_getEmpty(objHandle: HCkPublicKey): wordbool; stdcall;
Introduced in version 9.5.0.87

Indicates whether this object is empty or holds a public key.

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KeySize
function CkPublicKey_getKeySize(objHandle: HCkPublicKey): Integer; stdcall;
Introduced in version 9.5.0.67

Gets the size (in bits) of the public key. For example: 1024, 2048, etc.

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KeyType
procedure CkPublicKey_getKeyType(objHandle: HCkPublicKey; outPropVal: HCkString); stdcall;
function CkPublicKey__keyType(objHandle: HCkPublicKey): PWideChar; stdcall;
Introduced in version 9.5.0.52

The type of public key. Can be "empty", "rsa", "dsa", or "ecc".

See the notes about PWideChar memory ownership and validity.

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LastErrorHtml
procedure CkPublicKey_getLastErrorHtml(objHandle: HCkPublicKey; outPropVal: HCkString); stdcall;
function CkPublicKey__lastErrorHtml(objHandle: HCkPublicKey): PWideChar; stdcall;

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.

See the notes about PWideChar memory ownership and validity.

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LastErrorText
procedure CkPublicKey_getLastErrorText(objHandle: HCkPublicKey; outPropVal: HCkString); stdcall;
function CkPublicKey__lastErrorText(objHandle: HCkPublicKey): PWideChar; stdcall;

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.

See the notes about PWideChar memory ownership and validity.

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LastErrorXml
procedure CkPublicKey_getLastErrorXml(objHandle: HCkPublicKey; outPropVal: HCkString); stdcall;
function CkPublicKey__lastErrorXml(objHandle: HCkPublicKey): PWideChar; stdcall;

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.

See the notes about PWideChar memory ownership and validity.

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LastMethodSuccess
function CkPublicKey_getLastMethodSuccess(objHandle: HCkPublicKey): wordbool; stdcall;
procedure CkPublicKey_putLastMethodSuccess(objHandle: HCkPublicKey; newPropVal: wordbool); stdcall;

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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VerboseLogging
function CkPublicKey_getVerboseLogging(objHandle: HCkPublicKey): wordbool; stdcall;
procedure CkPublicKey_putVerboseLogging(objHandle: HCkPublicKey; newPropVal: wordbool); stdcall;

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
procedure CkPublicKey_getVersion(objHandle: HCkPublicKey; outPropVal: HCkString); stdcall;
function CkPublicKey__version(objHandle: HCkPublicKey): PWideChar; stdcall;

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

See the notes about PWideChar memory ownership and validity.

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Methods

GetDer
function CkPublicKey_GetDer(objHandle: HCkPublicKey;
    preferPkcs1: wordbool;
    outBytes: HCkByteData): wordbool; stdcall;
Introduced in version 9.5.0.58

Returns the public key in binary DER format. If the key type (such as RSA) supports both PKCS1 and PKCS8 formats, then preferPkcs1 determine which format is returned.

Returns True for success, False for failure.

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GetEncoded
function CkPublicKey_GetEncoded(objHandle: HCkPublicKey;
    preferPkcs1: wordbool;
    encoding: PWideChar;
    outStr: HCkString): wordbool; stdcall;
function CkPublicKey__getEncoded(objHandle: HCkPublicKey;
    preferPkcs1: wordbool;
    encoding: PWideChar): PWideChar; stdcall;
Introduced in version 9.5.0.58

Returns the public key in DER format as an encoded string (such as base64 or hex). If the key type (such as RSA) supports both PKCS1 and PKCS8 formats, then preferPkcs1 determine which format is returned. The encoding specifies the encoding, which is typically "base64".

Returns True for success, False for failure.

See the notes about PWideChar memory ownership and validity.

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GetJwk
function CkPublicKey_GetJwk(objHandle: HCkPublicKey;
    outStr: HCkString): wordbool; stdcall;
function CkPublicKey__getJwk(objHandle: HCkPublicKey): PWideChar; stdcall;
Introduced in version 9.5.0.66

Gets the public key in JWK (JSON Web Key) format.

RSA public keys have this JWK format:

         {"kty":"RSA",
          "n": "0vx7agoebGcQSuuPiLJXZptN9 ... U8awapJzKnqDKgw",
          "e":"AQAB"}

ECC public keys have this JWK format:

         {"kty":"EC",
          "crv":"P-256",
          "x":"MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
          "y":"4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM"}

Ed25519 public keys (added in v9.5.0.83) have this JWK format:

         {"kty":"OKP",
          "crv":"Ed25519",
          "x": "SE2Kne5xt51z1eciMH2T2ftDQp96Gl6FhY6zSQujiP0"}

Returns True for success, False for failure.

See the notes about PWideChar memory ownership and validity.

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GetJwkThumbprint
function CkPublicKey_GetJwkThumbprint(objHandle: HCkPublicKey;
    hashAlg: PWideChar;
    outStr: HCkString): wordbool; stdcall;
function CkPublicKey__getJwkThumbprint(objHandle: HCkPublicKey;
    hashAlg: PWideChar): PWideChar; stdcall;
Introduced in version 9.5.0.66

Returns the JWK thumbprint for the public key. This is the thumbprint of the JSON Web Key (JWK) as per RFC 7638.

Returns True for success, False for failure.

See the notes about PWideChar memory ownership and validity.

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GetPem
function CkPublicKey_GetPem(objHandle: HCkPublicKey;
    preferPkcs1: wordbool;
    outStr: HCkString): wordbool; stdcall;
function CkPublicKey__getPem(objHandle: HCkPublicKey;
    preferPkcs1: wordbool): PWideChar; stdcall;
Introduced in version 9.5.0.58

Returns the public key in PEM format. If the key type (such as RSA) supports both PKCS1 and PKCS8 formats, then preferPkcs1 determine which format is returned.

Returns True for success, False for failure.

See the notes about PWideChar memory ownership and validity.

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GetXml
function CkPublicKey_GetXml(objHandle: HCkPublicKey;
    outStr: HCkString): wordbool; stdcall;
function CkPublicKey__getXml(objHandle: HCkPublicKey): PWideChar; stdcall;

Gets the public key in XML format. The format depends on the key type. The key parts indicated by "..." are base64 encoded.

RSA public keys have this XML format:

<RSAPublicKey>
  <Modulus>...</Modulus>
  <Exponent>...</Exponent>
</RSAPublicKey>

DSA public keys have this XML format:

<DSAPublicKey>
    <P>...</P>
    <Q>...</Q>
    <G>...</G>
    <Y>...</Y>
</DSAPublicKey>

ECC public keys have this XML format:

<ECCPublicKey curve="CURVE_NAME" x="HEX_DATA" y="HEX_DATA">...</ECCPublicKey>

Returns True for success, False for failure.

See the notes about PWideChar memory ownership and validity.

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LoadBase64
function CkPublicKey_LoadBase64(objHandle: HCkPublicKey;
    keyStr: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.47

Loads a public key from base64-encoded DER (can be PKCS1 or PKCS8).

Returns True for success, False for failure.

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LoadBd
function CkPublicKey_LoadBd(objHandle: HCkPublicKey;
    bd: HCkBinData): wordbool; stdcall;
Introduced in version 9.5.0.83

Loads a public key from any binary or string format where the data is contained in bd. Chilkat automatically recognizes the format and key type (RSA, EC, DSA, Ed25519, ..)

Returns True for success, False for failure.

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LoadEcdsa
function CkPublicKey_LoadEcdsa(objHandle: HCkPublicKey;
    curveName: PWideChar;
    Qx: PWideChar;
    Qy: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.85

Loads an ECDSA public key directly from Qx, Qy values specified as a hex strings. The curveName can be one of the following:

  • secp256r1
  • secp384r1
  • secp521r1
  • secp256k1
  • secp192r1
  • secp224r1
  • brainpoolp256r1
  • brainpoolp160r1
  • brainpoolp192r1
  • brainpoolp224r1
  • brainpoolp320r1
  • brainpoolp384r1
  • brainpoolp512r1

Note: ECDSA public keys of various formats, such as PKCS8, PKCS1, JWK, XML, binary DER, PEM, etc., can be loaded using the LoadBd, LoadFromBinary, LoadFromFile, and LoadFromString methods.

Returns True for success, False for failure.

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LoadEd25519
function CkPublicKey_LoadEd25519(objHandle: HCkPublicKey;
    pubKey: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.83

Loads the public key object from a 32-byte ed25519 key specified as a hex string.

Returns True for success, False for failure.

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LoadFromBinary
function CkPublicKey_LoadFromBinary(objHandle: HCkPublicKey;
    keyBytes: HCkByteData): wordbool; stdcall;
Introduced in version 9.5.0.58

Loads a public key from binary DER. Auto-recognizes both PKCS1 and PKCS8 formats.

Returns True for success, False for failure.

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LoadFromFile
function CkPublicKey_LoadFromFile(objHandle: HCkPublicKey;
    path: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.58

Loads a public key from a file. The file can be in any string or binary format such as binary DER (PKCS1 or PKCS8), PEM, XML, or encoded binary DER (such as base64 encoded binary DER). The format of the contents of the file is auto-recognized.

Starting in version 9.5.0.66, this method also supports loading the JWK (JSON Web Key) format.

Returns True for success, False for failure.

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LoadFromString
function CkPublicKey_LoadFromString(objHandle: HCkPublicKey;
    keyString: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.58

Loads a public key from any string format, such as PEM, XML, or encoded binary DER (such as base64 encoded binary DER). The format of the keyString is auto-recognized.

Starting in version 9.5.0.66, this method also supports loading the JWK (JSON Web Key) format.

Returns True for success, False for failure.

More Information and Examples
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SaveDerFile
function CkPublicKey_SaveDerFile(objHandle: HCkPublicKey;
    preferPkcs1: wordbool;
    path: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.58

Saves the public key to a file in binary DER format. If the key type (such as RSA) supports both PKCS1 and PKCS8 formats, then preferPkcs1 determine which format is returned.

Returns True for success, False for failure.

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SavePemFile
function CkPublicKey_SavePemFile(objHandle: HCkPublicKey;
    preferPkcs1: wordbool;
    path: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.58

Saves the public key to a file in PEM format. If the key type (such as RSA) supports both PKCS1 and PKCS8 formats, then preferPkcs1 determine which format is returned.

Returns True for success, False for failure.

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SaveXmlFile
function CkPublicKey_SaveXmlFile(objHandle: HCkPublicKey;
    path: PWideChar): wordbool; stdcall;

Saves the public key to an XML file.

Returns True for success, False for failure.

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