PrivateKey Node.js Reference Documentation

PrivateKey

Current Version: 9.5.0.75

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

Object Creation

var obj = new chilkat.PrivateKey();

Properties

BitLength
BitLength
· integer, read-only
Introduced in version 9.5.0.49

The bit length (strength) of the private key.

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DebugLogFilePath
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.

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KeyType
KeyType
· string, read-only
Introduced in version 9.5.0.52

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

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LastErrorHtml
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.

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LastErrorText
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.

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LastErrorXml
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.

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LastMethodSuccess
LastMethodSuccess
· boolean
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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Pkcs8EncryptAlg
Pkcs8EncryptAlg
· string
Introduced in version 9.5.0.49

The encryption algorithm to be used when exporting the key to encrypted PKCS8. The default value is "3des". Possible choices also include "aes128", "aes192", and "aes256". All of the encryption algorithm choices use CBC mode.

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VerboseLogging
VerboseLogging
· boolean

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
Version
· string, read-only

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

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Methods

GetJwk
var retStr = GetJwk();
· Returns a String.
Introduced in version 9.5.0.66

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

RSA keys have this JWK format:

         {"kty":"RSA",
          "n":"0vx7agoebGcQ ... JzKnqDKgw",
          "e":"AQAB",
          "d":"X4cTteJY_gn4F ... 4jfcKoAC8Q",
          "p":"83i-7IvMGXoMX ... vn7O0nVbfs",
          "q":"3dfOR9cuYq-0S ... 4vIcb6yelxk",
          "dp":"G4sPXkc6Ya9 ... 8YeiKkTiBj0",
          "dq":"s9lAH9fggBso ... w494Q_cgk",
          "qi":"GyM_p6JrXySi ... zTKhAVRU"}

ECC keys have this JWK format.

         {"kty":"EC",
          "crv":"P-256",
          "x":"MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
          "y":"4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
          "d":"870MB6gfuTJ4HtUnUvYMyJpr5eUZNP4Bk43bVdj3eAE"}

Returns null on failure

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GetJwkThumbprint
var retStr = GetJwkThumbprint(hashAlg);
· Returns a String.
· hashAlg String
Introduced in version 9.5.0.66

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

Returns null on failure

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GetPkcs1
var retBuf = GetPkcs1();
· Returns a Buffer.
Introduced in version 9.5.0.58

Gets the private key in unencrypted binary DER format, preferring PKCS1 if possible.

RSA keys are returned in PKCS1 ASN.1 DER format:

RSAPrivateKey ::= SEQUENCE {
    version           Version,
    modulus           INTEGER,  -- n
    publicExponent    INTEGER,  -- e
    privateExponent   INTEGER,  -- d
    prime1            INTEGER,  -- p
    prime2            INTEGER,  -- q
    exponent1         INTEGER,  -- d mod (p-1)
    exponent2         INTEGER,  -- d mod (q-1)
    coefficient       INTEGER,  -- (inverse of q) mod p
    otherPrimeInfos   OtherPrimeInfos OPTIONAL
}

DSA keys are returned in this ASN.1 DER format:

SEQUENCE(6 elem)
    INTEGER 0
    INTEGER(2048 bit) (p) 
    INTEGER(160 bit) (q) 
    INTEGER(2044 bit) (g) 
    INTEGER(2040 bit) (y - public key) 
    INTEGER(156 bit) (x - private key) 

ECC keys are returned in this ASN.1 DER format:

(from RFC 5915)
ECPrivateKey ::= SEQUENCE {
    version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
    privateKey     OCTET STRING,
    parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
    publicKey  [1] BIT STRING OPTIONAL (This is the ANSI X9.63 public key format.)

Returns null on failure

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GetPkcs1ENC
var retStr = GetPkcs1ENC(encoding);
· Returns a String.
· encoding String
Introduced in version 9.5.0.52

Gets the private key in unencrypted binary DER format, preferring PKCS1 if possible, and returns in an encoded string, as specified by the encoding argument.

RSA keys are returned in PKCS1 ASN.1 DER format:

RSAPrivateKey ::= SEQUENCE {
    version           Version,
    modulus           INTEGER,  -- n
    publicExponent    INTEGER,  -- e
    privateExponent   INTEGER,  -- d
    prime1            INTEGER,  -- p
    prime2            INTEGER,  -- q
    exponent1         INTEGER,  -- d mod (p-1)
    exponent2         INTEGER,  -- d mod (q-1)
    coefficient       INTEGER,  -- (inverse of q) mod p
    otherPrimeInfos   OtherPrimeInfos OPTIONAL
}

DSA keys are returned in this ASN.1 DER format:

SEQUENCE(6 elem)
    INTEGER 0
    INTEGER(2048 bit) (p) 
    INTEGER(160 bit) (q) 
    INTEGER(2044 bit) (g) 
    INTEGER(2040 bit) (y - public key) 
    INTEGER(156 bit) (x - private key) 

ECC keys are returned in this ASN.1 DER format:

(from RFC 5915)
ECPrivateKey ::= SEQUENCE {
    version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
    privateKey     OCTET STRING,
    parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
    publicKey  [1] BIT STRING OPTIONAL (This is the ANSI X9.63 public key format.)

Returns null on failure

More Information and Examples
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GetPkcs1Pem
var retStr = GetPkcs1Pem();
· Returns a String.
Introduced in version 9.5.0.58

Gets the private key in non-encrypted PEM format, preferring PKCS1 over PKCS8 if possible for the key type.

Returns null on failure

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GetPkcs8
var retBuf = GetPkcs8();
· Returns a Buffer.

Gets the private key in unencrypted PKCS8 format.

RSA keys are returned in PKCS8 ASN.1 DER format:

SEQUENCE                  // PrivateKeyInfo
+- INTEGER                // Version - 0 (v1998)
+- SEQUENCE               // AlgorithmIdentifier
   +- OID                 // 1.2.840.113549.1.1.1
   +- NULL                // Optional Parameters
+- OCTETSTRING            // PrivateKey
   +- SEQUENCE            // RSAPrivateKey
      +- INTEGER(0)       // Version - v1998(0)
      +- INTEGER(N)       // N
      +- INTEGER(E)       // E
      +- INTEGER(D)       // D
      +- INTEGER(P)       // P
      +- INTEGER(Q)       // Q
      +- INTEGER(DP)      // d mod p-1
      +- INTEGER(DQ)      // d mod q-1
      +- INTEGER(Inv Q)   // INV(q) mod p

DSA keys are returned in this ASN.1 DER format:

SEQUENCE                 // PrivateKeyInfo
+- INTEGER                 // Version
+- SEQUENCE              // AlgorithmIdentifier
    +- OID                       // 1.2.840.10040.4.1
    +- SEQUENCE           // DSS-Params (Optional Parameters)
	+- INTEGER(P)      // P
	+- INTEGER(Q)      // Q
	+- INTEGER(G)      // G
    +- OCTETSTRING             // PrivateKey
	+- INTEGER(X)      // DSAPrivateKey X

ECC keys are returned in this ASN.1 DER format:

(from RFC 5915)
ECPrivateKey ::= SEQUENCE {
    version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
    privateKey     OCTET STRING,
    parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
    publicKey  [1] BIT STRING OPTIONAL (This is the ANSI X9.63 public key format.)

Returns null on failure

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GetPkcs8ENC
var retStr = GetPkcs8ENC(encoding);
· Returns a String.
· encoding String
Introduced in version 9.5.0.52

Gets the private key in unencrypted PKCS8 format and returned in an encoded string, as specified by the encoding argument.

Returns null on failure

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GetPkcs8Encrypted
var retBuf = GetPkcs8Encrypted(password);
· Returns a Buffer.

Writes the private key to password-protected PKCS8 format. The Pkcs8EncryptAlg property controls the encryption algorithm used to encrypt.

Returns null on failure

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GetPkcs8EncryptedENC
var retStr = GetPkcs8EncryptedENC(encoding, password);
· Returns a String.
· encoding String
· password String
Introduced in version 9.5.0.52

Writes the private key to password-protected PKCS8 format and returns as an encoded string as specified by the encoding argument. The Pkcs8EncryptAlg property controls the encryption algorithm used to encrypt.

Returns null on failure

More Information and Examples
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GetPkcs8EncryptedPem
var retStr = GetPkcs8EncryptedPem(password);
· Returns a String.
· password String

Writes the private key to password-protected PKCS8 PEM format. The Pkcs8EncryptAlg property controls the encryption algorithm used to encrypt.

Returns null on failure

More Information and Examples
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GetPkcs8Pem
var retStr = GetPkcs8Pem();
· Returns a String.

Gets the private key in PKCS8 PEM format.

Returns null on failure

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GetPublicKey
var ret_publicKey = GetPublicKey();
· Returns a PublicKey
Introduced in version 9.5.0.52

Returns the public key portion of the private key as a public key object.

Returns null on failure

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GetXml
var retStr = GetXml();
· Returns a String.

Returns the private key in XML format. The private key is returned unencrypted and the parts are base64 encoded.

RSA keys have this XML format:

<RSAKeyValue>
  <Modulus>...</Modulus>
  <Exponent>...</Exponent>
  <P>...</P>
  <Q>...</Q>
  <DP>...</DP>
  <DQ>...</DQ>
  <InverseQ>...</InverseQ>
  <D>...</D>
</RSAKeyValue>

DSA keys have this XML format:

<DSAKeyValue>
	<P>...</P>
	<Q>...</Q>
	<G>...</G>
	<Y>...</Y>
	<X>...</X>
</DSAKeyValue>

ECC keys have this XML format. The CURVE_NAME could be one of secp256r1, secp384r1, secp521r1, secp256k1 (or others as new curves are supported.)

<ECCKeyValue curve="CURVE_NAME">...</ECCKeyValue>

Returns null on failure

More Information and Examples
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LoadAnyFormat
var status = LoadAnyFormat(privKeyData, password);
· Returns Boolean (true for success, false for failure).
· privKeyDatabool
· password String
Introduced in version 9.5.0.75

Loads a private key from any format (PKCS1, PKCS8, PEM, JWK, PVK, etc.). The contents of the key (binary or text) is passed in privKeyData. The password is optional and should be specified if needed.

Returns true for success, false for failure.

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LoadEncryptedPem
var status = LoadEncryptedPem(pemStr, password);
· Returns Boolean (true for success, false for failure).
· pemStr String
· password String

Loads the private key from an in-memory encrypted PEM string. An encrypted PEM contains the private key in encrypted PKCS#8 format, where the data begins and ends with the following tags:

-----BEGIN ENCRYPTED PRIVATE KEY-----
BASE64 ENCODED DATA
-----END ENCRYPTED PRIVATE KEY-----

For those requiring a deeper understanding: The base64 data contains ASN.1 DER with the following structure:

EncryptedPrivateKeyInfo ::= SEQUENCE {
  encryptionAlgorithm  EncryptionAlgorithmIdentifier,
  encryptedData        EncryptedData
}

EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier

EncryptedData ::= OCTET STRING

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadEncryptedPemFile
var status = LoadEncryptedPemFile(path, password);
· Returns Boolean (true for success, false for failure).
· path String
· password String

Loads a private key from an encrypted PEM file.

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadJwk
var status = LoadJwk(jsonStr);
· Returns Boolean (true for success, false for failure).
· jsonStr String
Introduced in version 9.5.0.66

Loads a private key from an JWK (JSON Web Key) string.

RSA keys have this JWK format:

         {"kty":"RSA",
          "n":"0vx7agoebGcQ ... JzKnqDKgw",
          "e":"AQAB",
          "d":"X4cTteJY_gn4F ... 4jfcKoAC8Q",
          "p":"83i-7IvMGXoMX ... vn7O0nVbfs",
          "q":"3dfOR9cuYq-0S ... 4vIcb6yelxk",
          "dp":"G4sPXkc6Ya9 ... 8YeiKkTiBj0",
          "dq":"s9lAH9fggBso ... w494Q_cgk",
          "qi":"GyM_p6JrXySi ... zTKhAVRU"}

ECC keys have this JWK format.

         {"kty":"EC",
          "crv":"P-256",
          "x":"MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
          "y":"4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
          "d":"870MB6gfuTJ4HtUnUvYMyJpr5eUZNP4Bk43bVdj3eAE"}

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadPem
var status = LoadPem(str);
· Returns Boolean (true for success, false for failure).
· str String

Loads the private key from an in-memory PEM string. If the PEM contains an encrypted private key, then the LoadEncryptedPem method should instead be called. This method is for loading an unencrypted private key stored in PEM using PKCS#1 or PKCS#8.

A private key stored in PKCS#1 format begins and ends with the tags:

-----BEGIN RSA PRIVATE KEY-----
BASE64 ENCODED DATA
-----END RSA PRIVATE KEY-----

For those requiring a deeper understanding, the PKCS1 base64 contains ASN.1 in DER encoding with the following structure:

RSAPrivateKey ::= SEQUENCE {
  version           Version,
  modulus           INTEGER,  -- n
  publicExponent    INTEGER,  -- e
  privateExponent   INTEGER,  -- d
  prime1            INTEGER,  -- p
  prime2            INTEGER,  -- q
  exponent1         INTEGER,  -- d mod (p-1)
  exponent2         INTEGER,  -- d mod (q-1)
  coefficient       INTEGER,  -- (inverse of q) mod p
  otherPrimeInfos   OtherPrimeInfos OPTIONAL
}

A private key stored in PKCS#8 format begins and ends with the tags:

-----BEGIN PRIVATE KEY-----
BASE64 ENCODED DATA
-----END PRIVATE KEY-----

For those requiring a deeper understanding, the PKCS8 base64 contains ASN.1 in DER encoding with the following structure:

PrivateKeyInfo ::= SEQUENCE {
  version         Version,
  algorithm       AlgorithmIdentifier,
  PrivateKey      BIT STRING
}

AlgorithmIdentifier ::= SEQUENCE {
  algorithm       OBJECT IDENTIFIER,
  parameters      ANY DEFINED BY algorithm OPTIONAL
}

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadPemFile
var status = LoadPemFile(path);
· Returns Boolean (true for success, false for failure).
· path String

Loads a private key from a PEM file.

Returns true for success, false for failure.

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LoadPkcs1
var status = LoadPkcs1(data);
· Returns Boolean (true for success, false for failure).
· data Buffer
Introduced in version 9.5.0.58

Loads an RSA, ECC, or DSA private key from binary DER.

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadPkcs1File
var status = LoadPkcs1File(path);
· Returns Boolean (true for success, false for failure).
· path String
Introduced in version 9.5.0.58

Loads a private key from a PKCS1 file.

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadPkcs8
var status = LoadPkcs8(data);
· Returns Boolean (true for success, false for failure).
· data Buffer

Loads a private key from in-memory PKCS8 byte data.

For those requiring a deeper understanding, the PKCS8 contains ASN.1 in DER encoding with the following structure:

PrivateKeyInfo ::= SEQUENCE {
  version         Version,
  algorithm       AlgorithmIdentifier,
  PrivateKey      BIT STRING
}

AlgorithmIdentifier ::= SEQUENCE {
  algorithm       OBJECT IDENTIFIER,
  parameters      ANY DEFINED BY algorithm OPTIONAL
}

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadPkcs8Encrypted
var status = LoadPkcs8Encrypted(data, password);
· Returns Boolean (true for success, false for failure).
· data Buffer
· password String

Loads a private key from in-memory password-protected PKCS8 byte data.

For those requiring a deeper understanding, the encrypted PKCS8 contains ASN.1 in DER encoding with the following structure:

EncryptedPrivateKeyInfo ::= SEQUENCE {
  encryptionAlgorithm  EncryptionAlgorithmIdentifier,
  encryptedData        EncryptedData
}

EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier

EncryptedData ::= OCTET STRING

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadPkcs8EncryptedFile
var status = LoadPkcs8EncryptedFile(path, password);
· Returns Boolean (true for success, false for failure).
· path String
· password String

Loads a private key from an encrypted PKCS8 file.

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

More Information and Examples
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LoadPkcs8File
var status = LoadPkcs8File(path);
· Returns Boolean (true for success, false for failure).
· path String

Loads a private key from a PKCS8 file.

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadXml
var status = LoadXml(xml);
· Returns Boolean (true for success, false for failure).
· xml String

Loads a private key from an XML string.

RSA keys have this XML format:

<RSAKeyValue>
  <Modulus>...</Modulus>
  <Exponent>...</Exponent>
  <P>...</P>
  <Q>...</Q>
  <DP>...</DP>
  <DQ>...</DQ>
  <InverseQ>...</InverseQ>
  <D>...</D>
</RSAKeyValue>

DSA keys have this XML format:

<DSAKeyValue>
	<P>...</P>
	<Q>...</Q>
	<G>...</G>
	<Y>...</Y>
	<X>...</X>
</DSAKeyValue>

ECC keys have this XML format. The CURVE_NAME could be one of secp256r1, secp384r1, secp521r1, secp256k1 (or others as new curves are supported.)

<ECCKeyValue curve="CURVE_NAME">...</ECCKeyValue>

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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LoadXmlFile
var status = LoadXmlFile(path);
· Returns Boolean (true for success, false for failure).
· path String

Loads a private key from an XML file.

Note: Each of the private key Load* methods willl auto-recognize the content and will parse appropriately. The private key should be successfully loaded even when the wrong format data is passed to the wrong method.

Returns true for success, false for failure.

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SaveLastError
var status = SaveLastError(path);
· Returns Boolean (true for success, false for failure).
· path String

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
var status = SavePemFile(path);
· Returns Boolean (true for success, false for failure).
· path String
Introduced in version 9.5.0.58

Saves the private key to an unencrypted PKCS1 PEM format file.

Returns true for success, false for failure.

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SavePkcs1File
var status = SavePkcs1File(path);
· Returns Boolean (true for success, false for failure).
· path String
Introduced in version 9.5.0.58

Saves the private key to an unencrypted binary PKCS1 format file.

Returns true for success, false for failure.

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SavePkcs8EncryptedFile
var status = SavePkcs8EncryptedFile(password, path);
· Returns Boolean (true for success, false for failure).
· password String
· path String

Saves the private key to a password-protected PKCS8 format file. The Pkcs8EncryptAlg property controls the encryption algorithm used to encrypt.

Returns true for success, false for failure.

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SavePkcs8EncryptedPemFile
var status = SavePkcs8EncryptedPemFile(password, path);
· Returns Boolean (true for success, false for failure).
· password String
· path String

Saves the private key to a password-protected PKCS8 PEM format file. The Pkcs8EncryptAlg property controls the encryption algorithm used to encrypt.

Returns true for success, false for failure.

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SavePkcs8File
var status = SavePkcs8File(path);
· Returns Boolean (true for success, false for failure).
· path String

Saves the private key to an unencrypted binary PKCS8 format file.

Returns true for success, false for failure.

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SavePkcs8PemFile
var status = SavePkcs8PemFile(path);
· Returns Boolean (true for success, false for failure).
· path String

Saves the private key to a PKCS8 PEM format file.

Returns true for success, false for failure.

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SaveXmlFile
var status = SaveXmlFile(path);
· Returns Boolean (true for success, false for failure).
· path String

Saves the private key to an XML file.

Returns true for success, false for failure.

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