PublicKey Unicode C Reference Documentation

PublicKey

Current Version: 9.5.0.73

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

HCkPublicKeyW instance = CkPublicKeyW_Create();
// ...
CkPublicKeyW_Dispose(instance);
HCkPublicKeyW CkPublicKeyW_Create(void);

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

void CkPublicKeyW_Dispose(HCkPublicKeyW handle);

Objects created by calling CkPublicKeyW_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 CkPublicKeyW_Dispose.

Properties

DebugLogFilePath
void CkPublicKeyW_getDebugLogFilePath(HCkPublicKeyW cHandle, HCkString retval);
void CkPublicKeyW_putDebugLogFilePath(HCkPublicKeyW cHandle, const wchar_t *newVal);
const wchar_t *CkPublicKeyW_debugLogFilePath(HCkPublicKeyW cHandle);

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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KeySize
int CkPublicKeyW_getKeySize(HCkPublicKeyW cHandle);
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
void CkPublicKeyW_getKeyType(HCkPublicKeyW cHandle, HCkString retval);
const wchar_t *CkPublicKeyW_keyType(HCkPublicKeyW cHandle);
Introduced in version 9.5.0.52

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

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LastErrorHtml
void CkPublicKeyW_getLastErrorHtml(HCkPublicKeyW cHandle, HCkString retval);
const wchar_t *CkPublicKeyW_lastErrorHtml(HCkPublicKeyW cHandle);

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
void CkPublicKeyW_getLastErrorText(HCkPublicKeyW cHandle, HCkString retval);
const wchar_t *CkPublicKeyW_lastErrorText(HCkPublicKeyW cHandle);

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
void CkPublicKeyW_getLastErrorXml(HCkPublicKeyW cHandle, HCkString retval);
const wchar_t *CkPublicKeyW_lastErrorXml(HCkPublicKeyW cHandle);

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 CkPublicKeyW_getLastMethodSuccess(HCkPublicKeyW cHandle);
void CkPublicKeyW_putLastMethodSuccess(HCkPublicKeyW cHandle, BOOL newVal);
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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VerboseLogging
BOOL CkPublicKeyW_getVerboseLogging(HCkPublicKeyW cHandle);
void CkPublicKeyW_putVerboseLogging(HCkPublicKeyW 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 CkPublicKeyW_getVersion(HCkPublicKeyW cHandle, HCkString retval);
const wchar_t *CkPublicKeyW_version(HCkPublicKeyW cHandle);

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

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Methods

GetDer
BOOL CkPublicKeyW_GetDer(HCkPublicKeyW cHandle, BOOL preferPkcs1, const unsigned char * outBytes);
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
BOOL CkPublicKeyW_GetEncoded(HCkPublicKeyW cHandle, BOOL preferPkcs1, const wchar_t *encoding, const wchar_t *outStr);
const wchar_t *CkPublicKeyW_getEncoded(HCkPublicKeyW cHandle, BOOL preferPkcs1, const wchar_t *encoding);
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.

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GetJwk
BOOL CkPublicKeyW_GetJwk(HCkPublicKeyW cHandle, const wchar_t *outStr);
const wchar_t *CkPublicKeyW_getJwk(HCkPublicKeyW cHandle);
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"}

Returns TRUE for success, FALSE for failure.

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GetJwkThumbprint
BOOL CkPublicKeyW_GetJwkThumbprint(HCkPublicKeyW cHandle, const wchar_t *hashAlg, const wchar_t *outStr);
const wchar_t *CkPublicKeyW_getJwkThumbprint(HCkPublicKeyW cHandle, const wchar_t *hashAlg);
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.

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GetPem
BOOL CkPublicKeyW_GetPem(HCkPublicKeyW cHandle, BOOL preferPkcs1, const wchar_t *outStr);
const wchar_t *CkPublicKeyW_getPem(HCkPublicKeyW cHandle, BOOL preferPkcs1);
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.

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GetXml
BOOL CkPublicKeyW_GetXml(HCkPublicKeyW cHandle, const wchar_t *outStr);
const wchar_t *CkPublicKeyW_getXml(HCkPublicKeyW cHandle);

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:

<RSAKeyValue>
  <Modulus>...</Modulus>
  <Exponent>...</Exponent>
</RSAKeyValue>

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.

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LoadBase64
BOOL CkPublicKeyW_LoadBase64(HCkPublicKeyW cHandle, const wchar_t *keyStr);
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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LoadFromBinary
BOOL CkPublicKeyW_LoadFromBinary(HCkPublicKeyW cHandle, const unsigned char * keyBytes);
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
BOOL CkPublicKeyW_LoadFromFile(HCkPublicKeyW cHandle, const wchar_t *path);
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
BOOL CkPublicKeyW_LoadFromString(HCkPublicKeyW cHandle, const wchar_t *keyString);
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
BOOL CkPublicKeyW_SaveDerFile(HCkPublicKeyW cHandle, BOOL preferPkcs1, const wchar_t *path);
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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SaveLastError
BOOL CkPublicKeyW_SaveLastError(HCkPublicKeyW cHandle, const wchar_t *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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SavePemFile
BOOL CkPublicKeyW_SavePemFile(HCkPublicKeyW cHandle, BOOL preferPkcs1, const wchar_t *path);
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.

More Information and Examples
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SaveXmlFile
BOOL CkPublicKeyW_SaveXmlFile(HCkPublicKeyW cHandle, const wchar_t *path);

Saves the public key to an XML file.

Returns TRUE for success, FALSE for failure.

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