CkoPem Swift Reference Documentation

CkoPem

For creating, loading, parsing, converting, and saving in the PEM format.

Note: There are many types of objects that can be stored in PEM format. Chilkat supports certificates, private keys, and public keys. There is still much more to do. If there is a need to support a particular type of content, contact Chilkat (support@chilkatsoft.com).

Properties

AppendMode: Bool

Introduced in version 9.5.0.49

When set to true, each of the Load* methods appends to the current contents of this PEM object. When set to false, a Load* method replaces the contents of this PEM object. The default is false.

DebugLogFilePath: 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.

HeartbeatMs: Int

Introduced in version 9.5.0.49

This is the number of milliseconds between each AbortCheck event callback. The AbortCheck callback allows an application to abort any event-enabled methods prior to completion. If HeartbeatMs is 0 (the default), no AbortCheck event callbacks will fire.

LastErrorHtml: String (read-only)

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.

LastErrorText: String (read-only)

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.

Concept of LastErrorText

LastErrorText Standard Information

LastErrorXml: String (read-only)

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.

LastMethodSuccess: 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.

NumCerts: Int (read-only)

Introduced in version 9.5.0.49

The number of certificates in the loaded PEM. To get the 1st certificate, call GetCert(0).

Iterate Keys and Certs in PEM

NumCsrs: Int (read-only)

Introduced in version 9.5.0.50

The number of certificate signing requests (CSRs) in the loaded PEM.

NumPrivateKeys: Int (read-only)

Introduced in version 9.5.0.49

The number of private keys in the loaded PEM. To get the 1st private key, call GetPrivateKey(0).

Iterate Keys and Certs in PEM

NumPublicKeys: Int (read-only)

Introduced in version 9.5.0.49

The number of public keys in the loaded PEM. To get the 1st public key, call GetPublicKey(0).

PrivateKeyFormat: String

Introduced in version 9.5.0.49

Controls the format to be used for unencrypted private keys when writing a PEM. Possible values are "pkcs1" and "pkcs8". (OpenSSL typically uses the "pkcs8" format.) When writing encrypted private keys to PEM, the format is always PKCS8, and the PEM header is "BEGIN ENCRYPTED PRIVATE KEY". The default is "pkcs8".

The PKCS1 format uses the PEM header: BEGIN RSA PRIVATE KEY.
The PKCS8 format uses the PEM header: BEGIN PRIVATE KEY.

PublicKeyFormat: String

Introduced in version 9.5.0.49

Controls the format to be used for public keys when writing a PEM. Possible values are "pkcs1" and "pkcs8". (OpenSSL typically uses the "pkcs8" format.) The default is "pkcs8".

The PKCS1 format uses the PEM header: BEGIN RSA PUBLIC KEY.
The PKCS8 format uses the PEM header: BEGIN PUBLIC KEY.

Write PKCS1 or PKCS8 Public Key PEM

VerboseLogging: 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.

Version: String (read-only)

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

Methods

AddCert(cert: CkoCert, includeChain: Bool) -> Bool

Introduced in version 9.5.0.49

Adds a certificate, and potentially the certs in its chain of authentication to the PEM. If includeChain is true, then certificates in the cert's chain of authentication up to and including the root are automatically added.

Returns true for success, false for failure.

Add Private Key and Certificate to a PEM

AddItem(itemType: String, encoding: String, itemData: String) -> Bool

Introduced in version 9.5.0.59

Adds a certificate, private key, public key, or csr to the PEM. The possible values for itemType are "certificate" (or "cert"), "privateKey", "publicKey", or "csr". The encoding can be "Base64", "modBase64", "Base32", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", "url_oauth", "url_rfc1738", "url_rfc2396", and "url_rfc3986". The itemData contains the ASN.1 data in string format according to the encoding specified in encoding.

Returns true for success, false for failure.

AddPrivateKey(privateKey: CkoPrivateKey) -> Bool

Introduced in version 9.5.0.49

Adds a private key to the PEM object.

Returns true for success, false for failure.

Add Private Key and Certificate to a PEM

Duplicate openssl pkcs12 –export –in certfile.cer –inkey certfile.key –out certfile.pfx

AddPrivateKey2(privKey: CkoPrivateKey, certChain: CkoCertChain) -> Bool

Introduced in version 9.5.0.49

Adds a private key and it's associated certificate chain to the PEM object.

Returns true for success, false for failure.

AddPublicKey(pubkey: CkoPublicKey) -> Bool

Introduced in version 9.5.0.49

Adds a public key to the PEM object.

Returns true for success, false for failure.

Clear() -> Bool

Introduced in version 9.5.0.49

Removes all content from this PEM object.

Returns true for success, false for failure.

GetCert(index: Int) -> CkoCert

Introduced in version 9.5.0.49

Returns the Nth certificate from the PEM. The first certificate is at index 0.

Returns nil on failure

Load Encrypted PEM Containing ECC Private Key and Certs and Examine Contents

GetEncodedItem(itemType: String, itemSubType: String, encoding: String, index: Int) -> String

Introduced in version 9.5.0.50

Returns the encoded contents of the Nth item of a particular type (0-based index). The possible values for itemType are "certificate" (or "cert"), "privateKey", "publicKey", or "csr". Input string args are case-insensitive. If the itemType is "privateKey", the itemSubType may be "der" or "pkcs8". If the itemType is "publicKey", the itemSubType may be "der" or "pkcs1". The itemSubType is ignored for other values of itemType. The valid encoding modes are "Base64", "modBase64", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", "url_oauth", "url_rfc1738", "url_rfc2396", and "url_rfc3986".

Returns nil on failure

GetPrivateKey(index: Int) -> CkoPrivateKey

Introduced in version 9.5.0.49

Returns the Nth private key from the PEM. The first private key is at index 0.

Returns nil on failure

Load Encrypted PEM Containing ECC Private Key and Certs and Examine Contents

GetPublicKey(index: Int) -> CkoPublicKey

Introduced in version 9.5.0.49

Returns the Nth public key from the PEM. The first public key is at index 0.

Returns nil on failure

LoadP7b(p7bData: NSData) -> Bool

Introduced in version 9.5.0.49

Loads the PEM from the contents of an in-memory PKCS7 container (.p7b).

Returns true for success, false for failure.

LoadP7bAsync(p7bData: NSData) -> CkoTask

Introduced in version 9.5.0.49

Creates an asynchronous task to call the LoadP7b method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns nil on failure

How to Run an Asynchronous Task

LoadP7bFile(path: String) -> Bool

Introduced in version 9.5.0.49

Loads the contents of a PKCS7 container (.p7b file).

Returns true for success, false for failure.

Load P7B and List Certificates

LoadP7bFileAsync(path: String) -> CkoTask

Introduced in version 9.5.0.49

Creates an asynchronous task to call the LoadP7bFile method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns nil on failure

How to Run an Asynchronous Task

LoadPem(pemContent: String, password: String) -> Bool

Introduced in version 9.5.0.49

Loads the PEM from a PEM string. If encrypted, then the password is required for decryption. Otherwise, an empty string (or any string) may be passed for the password.

Returns true for success, false for failure.

LoadPemAsync(pemContent: String, password: String) -> CkoTask

Introduced in version 9.5.0.49

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

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns nil on failure

How to Run an Asynchronous Task

LoadPemFile(path: String, password: String) -> Bool

Introduced in version 9.5.0.49

Loads the PEM from a PEM file. If encrypted, then the password is required for decryption. Otherwise, an empty string (or any string) may be passed for the password.

Returns true for success, false for failure.

Load PEM and List Certificates

LoadPemFileAsync(path: String, password: String) -> CkoTask

Introduced in version 9.5.0.49

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

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns nil on failure

How to Run an Asynchronous Task

RemoveCert(index: Int) -> Bool

Introduced in version 9.5.0.49

Removes the Nth certificate from the PEM. The first certificate is at index 0.

Returns true for success, false for failure.

RemovePrivateKey(index: Int) -> Bool

Introduced in version 9.5.0.49

Removes the Nth private key from the PEM. The first private key is at index 0.

Returns true for success, false for failure.

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.

ToJks(alias: String, password: String) -> CkoJavaKeyStore

Introduced in version 9.5.0.49

Converts the PEM to JKS and returns the Java KeyStore object. If the alias is non-empty, the 1st object (private key or certificate) will use the alias, and all others (if any) will receive auto-generated aliases. The JKS returned will be encrypted using the provided password. If the PEM contains only certificates (no private keys), then the password is unused.

Returns nil on failure

Convert PEM to JKS (Java KeyStore)

ToPem() -> String

Introduced in version 9.5.0.47

Write the PFX to a PEM formatted string. The resultant PEM will contain the private key, as well as the certs in the chain of authentication (or whatever certs are available in the PFX). For example:

 -----BEGIN RSA PRIVATE KEY-----
...
... the private key associated with the main certificate.
...
-----END RSA PRIVATE KEY-----
-----BEGIN CERTIFICATE-----
...
... the main certificate
...
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
...
... an intermediate CA certificate (if present)
...
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
...
... the root CA certificate
...
-----END CERTIFICATE----- 

Returns nil on failure

ToPemEx(extendedAttrs: Bool, noKeys: Bool, noCerts: Bool, noCaCerts: Bool, encryptAlg: String, password: String) -> String

Introduced in version 9.5.0.49

Write the PFX to a PEM formatted string. If extendedAttrs is true, then extended properties (Bag Attributes and Key Attributes) are output. If noKeys is true, then no private keys are output. If noCerts is true, then no certificates are output. If noCaCerts is true, then no CA certs or intermediate CA certs are output. If encryptAlg is not empty, it indicates the encryption algorithm to be used for encrypting the private keys (otherwise the private keys are output unencrypted). The possible choices for the encryptAlg are "des3", "aes128", "aes192", and "aes256". (All encryption algorithm choices use CBC mode.) If the private keys are to be encrypted, then password is the password to be used. Otherwise, password may be left empty. For example:

Bag Attributes
    Microsoft Local Key set: <No Values>
    localKeyID: 01 00 00 00 
    friendlyName: le-2b09a3d2-9037-4a05-95cc-4d44518e8607
    Microsoft CSP Name: Microsoft RSA SChannel Cryptographic Provider
Key Attributes
    X509v3 Key Usage: 10 
 -----BEGIN RSA PRIVATE KEY-----
...
... the private key associated with the main certificate.
...
-----END RSA PRIVATE KEY-----
Bag Attributes
    localKeyID: 01 00 00 00 
    1.3.6.1.4.1.311.17.3.92: 00 08 00 00 
    1.3.6.1.4.1.311.17.3.20: C2 53 54 F3 ...
    1.3.6.1.4.1.311.17.3.71: 49 00 43 00 ...
    1.3.6.1.4.1.311.17.3.75: 31 00 42 00 ...
subject=/OU=Domain Control Validated/OU=PositiveSSL/CN=something.com
issuer=/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO RSA Domain Validation Secure Server CA
-----BEGIN CERTIFICATE-----
...
... the main certificate
...
-----END CERTIFICATE-----
...
-----BEGIN CERTIFICATE-----
...
... an intermediate CA certificate (if present)
...
-----END CERTIFICATE-----
...
-----BEGIN CERTIFICATE-----
...
... the root CA certificate
...
-----END CERTIFICATE----- 

Returns nil on failure

ToPfx() -> CkoPfx

Introduced in version 9.5.0.49

Converts the PEM to PKCS12 and returns the PFX object. The PFX object has method for saving to a file, exporting to an encoded string, converting to a JKS (Java Keystore), or even converting back to PEM.

Note: The PEM must contain at least one private key to convert to PKCS12. The typical case is that a PKCS12 contains a single private key, along with the associated certificate and the certificates in the chain of authentication.

Returns nil on failure

Convert PEM to PKCS12 / PFX

Events

To implement an event callback, your application would define and implement a class that inherits from CkoBaseProgress. Your application can implement methods to override some or all of the default/empty method implementations of the CkoBaseProgress base class.

For example:

class MyPemProgress : CkoBaseProgress {

    override func ProgressInfo(name: String!, value: String!) {
        // application code goes here...
        print(name + ": " + value)
    }

    override func AbortCheck(abort: UnsafeMutablePointer) {
        // application code goes here...
        // To abort the operation, set this equal to true instead of false.
        abort.memory = false
    }

    override func PercentDone(pctDone: NSNumber!, abort: UnsafeMutablePointer) {
        // application code goes here...
        print(pctDone)
        // To abort the operation, set this equal to true instead of false.
        abort.memory = false
    }

    // For asynchronous method calls.
    override func TaskCompleted(task: CkoTask!) {
        // application code goes here...
    }
}

func someAppFunction() {

    // Demonstrate how to set the event callback object...
    let pem = CkoPem()
    let myPemProgress = MyPemProgress()
    
    pem.setEventCallbackObject(myPemProgress)

    // ...
    // ...
    // ...
}

AbortCheck(abort: Bool)

Provides the opportunity for a method call to be aborted. The AbortCheck event is fired periodically based on the value of the HeartbeatMs property. If HeartbeatMs is 0, then no AbortCheck events will fire. As an example, to fire 5 AbortCheck events per second, set the HeartbeatMs property equal to 200.

BinaryData(data: NSData, length: UInt)

Binary data provided by certain methods.

PercentDone(pctDone: Int, abort: Bool)

Provides the percentage completed for any method that involves network communications or time-consuming processing (assuming it is a method where a percentage completion can be measured). This event is only fired when it is possible to know a percentage completion, and when it makes sense to express the operation as a percentage completed. The pctDone argument will have a value from 1 to 100. For operations (Chilkat method calls) that complete very quickly, the number of PercentDone callbacks will vary, but the final callback should have a value of 100. For long running operations, no more than one callback per percentage point will occur (for example: 1, 2, 3, ... 98, 99, 100).

The PercentDone callback counts as an AbortCheck event. For method calls that complete quickly such that PercentDone events fire, it may be that AbortCheck events don't fire because the opportunity to abort is already provided in the PercentDone callback. For time consuming operations, where the amount of time between PercentDone callbacks are long, AbortCheck callbacks may be used to allow for the operation to be aborted in a more responsive manner.

The abort output argument provides a means for aborting the operation. Setting it to true will cause the method to abort and return a failed status (or whatever return value indicates failure).

ProgressInfo(name: String, value: String)

A general name/value event that provides information about what is happening during a method call. To find out what information is available, write code to handle this event and log the name/value pairs. Most are self-explanatory.

TaskCompleted(task: CkoTask)

Called in the background thread when an asynchronous task completes.

TextData(data: String)

Text data provided by certain methods.