PublicKey PureBasic Reference Documentation

PublicKey

Current Version: 10.1.0

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.

Object Creation

obj.i = CkPublicKey::ckCreate()

; Make sure to dispose of the object when finished like this:
CkPublicKey::ckDispose(obj);

Properties

DebugLogFilePath

Declare.s ckDebugLogFilePath(obj.i)
Declare setCkDebugLogFilePath(obj.i, value.s)

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

Example showing how to use DebugLogFilePath.

Empty

Declare.i ckEmpty(obj.i) ; (read-only)

Introduced in version 9.5.0.87

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

KeySize

Declare.i ckKeySize(obj.i) ; (read-only)

Introduced in version 9.5.0.67

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

KeyType

Declare.s ckKeyType(obj.i) ; (read-only)

Introduced in version 9.5.0.52

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

LastErrorHtml

Declare.s ckLastErrorHtml(obj.i) ; (read-only)

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.

LastErrorText

Declare.s ckLastErrorText(obj.i) ; (read-only)

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.

More Information and Examples

Concept of LastErrorText LastErrorText Standard Information

LastErrorXml

Declare.s ckLastErrorXml(obj.i) ; (read-only)

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.

LastMethodSuccess

Declare.i ckLastMethodSuccess(obj.i)
Declare setCkLastMethodSuccess(obj.i, value.i)

Indicates the success or failure of the most recent method call: 1 means success, 0 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.

VerboseLogging

Declare.i ckVerboseLogging(obj.i)
Declare setCkVerboseLogging(obj.i, value.i)

If set to 1, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is 0. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

Version

Declare.s ckVersion(obj.i) ; (read-only)

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

More Information and Examples

How to get the Chilkat version at runtime.

Methods

GetEncoded

Declare.s ckGetEncoded(obj.i, preferPkcs1.l, encoding.s)

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 an empty string on failure. Use the LastMethodSuccess property to check for success.

GetJwk

Declare.s ckGetJwk(obj.i)

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 an empty string on failure. Use the LastMethodSuccess property to check for success.

More Information and Examples

Get ECC Public Key in JWK Format (JSON Web Key)Get RSA Public Key in JWK Format (JSON Web Key)Create JWK Set Containing Certificates

GetJwkThumbprint

Declare.s ckGetJwkThumbprint(obj.i, hashAlg.s)

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 an empty string on failure. Use the LastMethodSuccess property to check for success.

More Information and Examples

Compute JWK Thumbprint for RSA and EC Public Keys

GetPem

Declare.s ckGetPem(obj.i, preferPkcs1.l)

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 an empty string on failure. Use the LastMethodSuccess property to check for success.

GetXml

Declare.s ckGetXml(obj.i)

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 an empty string on failure. Use the LastMethodSuccess property to check for success.

LoadBase64

Declare.i ckLoadBase64(obj.i, keyStr.s)

Introduced in version 9.5.0.47

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

Returns 1 for success, 0 for failure.

LoadBd

Declare.i ckLoadBd(obj.i, bd.i)

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 1 for success, 0 for failure.

LoadEcdsa

Declare.i ckLoadEcdsa(obj.i, curveName.s, Qx.s, Qy.s)

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 1 for success, 0 for failure.

More Information and Examples

Load EC Public Key from X,Y Values (easier)

LoadEd25519

Declare.i ckLoadEd25519(obj.i, pubKey.s)

Introduced in version 9.5.0.83

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

Returns 1 for success, 0 for failure.

LoadFromFile

Declare.i ckLoadFromFile(obj.i, path.s)

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 1 for success, 0 for failure.

LoadFromString

Declare.i ckLoadFromString(obj.i, keyString.s)

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 1 for success, 0 for failure.

More Information and Examples

Load JWK into PublicKey Object

SaveDerFile

Declare.i ckSaveDerFile(obj.i, preferPkcs1.l, path.s)

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 1 for success, 0 for failure.

SavePemFile

Declare.i ckSavePemFile(obj.i, preferPkcs1.l, path.s)

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 1 for success, 0 for failure.

More Information and Examples

Convert RSA Private Key to Public Key Export Public Key from USB Token or Smartcard using the Apple Keychain

SaveXmlFile

Declare.i ckSaveXmlFile(obj.i, path.s)

Saves the public key to an XML file.

Returns 1 for success, 0 for failure.