Chilkat.Crypt2 PHP Reference

Chilkat.Crypt2

Chilkat encryption component.

Object Creation

$obj = new COM("Chilkat.Crypt2");

Properties

int BlockSize (read-only)

The block-size (in bytes) of the selected encryption algorithm. For example, if the CryptAlgorithm property is set to "aes", the BlockSize property is automatically set to 16. The block-size for the ARC4 streaming encryption algorithm is 1.

bool ByteSwapOnDecrypt

Controls whether bytes are 4321 swapped on decryption. This helps in handling byte-ordering issues with cross-platform applications.

string Charset

Controls the character encoding of the text encrypted, signed, hashed or compressed. This property is relevant wherever strings are used as inputs or outputs.

When working with strings, it is important to know the exact bytes that are being encrypted/hashed/signed/compressed. This is critical when interoperating with other systems. If your application is sending an encrypted string to another system that will decrypt it, you will need to know the encoding of the string that is expected on the receiving end (after decryption). If you pass Unicode data (2 byte per character) to the encryptor, subsequent decryption will reproduce the original Unicode. However, it may be that your program works with Unicode strings, but the recipient of the encrypted data works with iso-8859-1 strings. In such a case, setting the Charset property to "iso-8859-1" causes the character data to be automatically converted to the Charset before being encrypted (or compressed, or hashed, or signed). The set of valid charsets is listed below:

ANSI
us-ascii
unicode
unicodefffe
iso-8859-1
iso-8859-2
iso-8859-3
iso-8859-4
iso-8859-5
iso-8859-6
iso-8859-7
iso-8859-8
iso-8859-9
iso-8859-13
iso-8859-15
windows-874
windows-1250
windows-1251
windows-1252
windows-1253
windows-1254
windows-1255
windows-1256
windows-1257
windows-1258
utf-7
utf-8
utf-32
utf-32be
shift_jis
gb2312
ks_c_5601-1987
big5
iso-2022-jp
iso-2022-kr
euc-jp
euc-kr
macintosh
x-mac-japanese
x-mac-chinesetrad
x-mac-korean
x-mac-arabic
x-mac-hebrew
x-mac-greek
x-mac-cyrillic
x-mac-chinesesimp
x-mac-romanian
x-mac-ukrainian
x-mac-thai
x-mac-ce
x-mac-icelandic
x-mac-turkish
x-mac-croatian
asmo-708
dos-720
dos-862
ibm037
ibm437
ibm500
ibm737
ibm775
ibm850
ibm852
ibm855
ibm857
ibm00858
ibm860
ibm861
ibm863
ibm864
ibm865
cp866
ibm869
ibm870
cp875
koi8-r
koi8-u

string CipherMode

Controls the cipher mode for Rijndael and Twofish encryption. Possible values are "CBC" (the default) and "ECB".

CBC is an acronym for Cipher Block Chaining, ECB is an acronym for Electronic CookBook.

string CompressionAlgorithm

Selects the compression algorithm to be used. Currently, the only valid setting is "BZIP2".

string CryptAlgorithm

Selects the encryption algorithm for encrypting and decrypting. Possible values are: "pki", "aes", "rijndael", "blowfish", "blowfish2", "des", "3des", "rc2", "arc4", "twofish", "pbes1" and "pbes2". The "pki" encryption algorithm isn't a specific algorithm, but instead tells the component to encrypt/decrypt using public-key encryption with digital certificates. The other choices, rijndael, blowfish, and twofish, are symmetric encryption algorithms that do not involve digital certificates and public/private keys.

The original Chilkat implementation of Blowfish has a 4321 byte-swapping issue (the results are 4321 byte-swapped). The new implementation ("blowfish2") does not byte swap. This should be used for compatibility with other Blowfish software.

Password-based encryption (PBE) is selected by setting this property to "pbes1" or "pbes2". Password-based encryption is defined in the PKCS5 Password-Based Cryptography Standard at http://www.rsa.com/rsalabs/node.asp?id=2127. If PBE is used, the underlying encryption algorithm is specified by the PbesAlgorithm property.

string EncodingMode

Controls the encoding of binary data to a printable string for many methods. The valid modes are "Base64", "QP" (for quoted-printable), "URL" (for url-encoding), and "Hex".

bool FirstChunk

Chilkat Crypt2 provides the ability to feed the encryption/decryption methods with chunks of data. This allows a large amount of data, or a data stream, to be fed piecemeal for encrypting or decrypting. It applies to all symmetric algorithms currently supported (AES, Blowfish, Twofish, 3DES, RC2, DES, ARC4), and all algorithms supported in the future.

The default value for both FirstChunk and LastChunk is true — meaning that when you call an Encrypt* or Decrypt* method, it is both the first and last chunk (i.e. it’s the entire amount of data to be encrypted or decrypted).

If you wish to feed the data piecemeal, do this:

1. Set FirstChunk = true, LastChunk = false for the first chunk of data.
2. For all “middle” chunks (i.e. all chunks except for the final chunk) set FirstChunk = false and LastChunk = false.
3. For the final chunk, set FirstChunk = false and LastChunk = true

You don’t need to worry about feeding data according to the block size of the encryption algorithm. For example, AES has a block size of 16 bytes. You may feed data in chunks of any size. The Chilkat Crypt2 component will buffer the data. When the final chunk is passed, the output is padded to the algorithm’s block size according to the PaddingScheme.

more info about FirstChunk/LastChunk

string HashAlgorithm

Selects the hash algorithm used by methods that create hashes. The valid choices are "sha1", "sha256", "sha384", "sha512", "md2", "md5", and "haval".

int HavalRounds

Applies to the HAVAL hash algorithm only and must be set to the integer value 3, 4, or 5. The default value is 3.

VARIANT IV

The initialization vector to be used with symmetric encryption algorithms (Rijndael, Blowfish, Twofish). If left unset, no initialization vector is used.

bool IncludeCertChain

To be documented soon.

int IterationCount

Iteration count to be used with password-based encryption (PBE). Password-based encryption is defined in the PKCS5 Password-Based Cryptography Standard at http://www.rsa.com/rsalabs/node.asp?id=2127

The purpose of the iteration count is to increase the computation required to encrypt and decrypt. A larger iteration count makes cracking via exhaustive search more difficult. The default value is 1024.

int KeyLength

The key length in bits for symmetric encryption algorithms. The default value is 128.

bool LastChunk

(See the description for the FirstChunk property.)

string LastErrorHtml (read-only)

Error information in HTML format for the last method called.

string LastErrorText (read-only)

Error information in plain-text format for the last method called.

string LastErrorXml (read-only)

Error information in XML format for the last method called.

int PaddingScheme

The padding scheme used by block encryption algorithms such as AES (Rijndael), Blowfish, Twofish, RC2, DES, 3DES, etc. Block encryption algorithms pad encrypted data to a multiple of algorithm's block size. The default value of this property is 0.

Possible values are:

0 = RFC 1423 padding scheme: Each padding byte is set to the number of padding bytes. If the data is already a multiple of algorithm's block size bytes, an extra block is appended each having a value equal to the block size. (for example, if the algorithm's block size is 16, then 16 bytes having the value 0x10 are added.). (This is also known as PKCS7 padding: PKCS #7 padding string consists of a sequence of bytes, each of which is equal to the total number of padding bytes added. )

1 = FIPS81 (Federal Information Processing Standards 81) where the last byte contains the number of padding bytes, including itself, and the other padding bytes are set to random values.

2 = Each padding byte is set to a random value. The decryptor must know how many bytes are in the original unencrypted data.

3 = Pad with NULLs. (If already a multiple of the algorithm's block size, no padding is added).

4 = Pad with SPACE chars(0x20). (If already a multiple of algorithm's block size, no padding is added).

string PbesAlgorithm

If the CryptAlgorithm property is set to "pbes1" or "pbes2", this property specifies the underlying encryption algorithm to be used with password-based encryption (PBE). Password-based encryption is defined in the PKCS5 Password-Based Cryptography Standard at http://www.rsa.com/rsalabs/node.asp?id=2127

string PbesPassword

The password to be used with password-based encryption (PBE). Password-based encryption is defined in the PKCS5 Password-Based Cryptography Standard at http://www.rsa.com/rsalabs/node.asp?id=2127

int Rc2EffectiveKeyLength

The effective key length (in bits) for the RC2 encryption algorithm. When RC2 is used, both the KeyLength and Rc2EffectiveKeyLength properties should be set. For RC2, both should be between 8 and 1024 (inclusive).

VARIANT Salt

The salt to be used with password-based encryption (PBE). Password-based encryption is defined in the PKCS5 Password-Based Cryptography Standard at http://www.rsa.com/rsalabs/node.asp?id=2127

VARIANT SecretKey

The binary secret key used for symmetric encryption (Rijndael, Blowfish, Twofish). The secret key must be identical for decryption to succeed. The length in bytes of the SecretKey must equal the KeyLength/8.

string UuFilename

To be documented soon...

string UuMode

To be documented soon...

int VerboseLogging

To be documented soon...

string Version (read-only)

The version of the component, such as "4.0.0".

Methods

void AddEncryptCert(Chilkat.Cert cert)

Adds a certificate to be used for public-key encryption. (To use public-key encryption with digital certificates, set the CryptAlgorithm property = "pki".) To encrypt with more than one certificate, call AddEncryptCert once per certificate.

VARIANT ByteSwap4321(VARIANT bData)

Convenience method for byte swapping between little-endian byte ordering and big-endian byte ordering.

Returns 1 for success, 0 for failure.

string BytesToString(VARIANT inData, string charset)

Convert a VARIANT containing a byte array to a String.

Returns a null on failure

bool CkDecryptFile(string inFilename, string outFilename)

File-to-file decryption. There is no limit to the size of the file that can be decrypted because the component will operate in streaming mode internally.

Returns 1 for success, 0 for failure.

bool CkEncryptFile(string inFilename, string outFilename)

File-to-file encryption. There is no limit to the size of the file that can be encrypted because the component will operate in streaming mode internally.

Returns 1 for success, 0 for failure.

void ClearEncryptCerts()

Clears the internal list of digital certificates to be used for public-key encryption.

VARIANT CompressBytes(VARIANT data)

Memory-to-memory compression. Compresses a byte array and returns a byte array of compressed data. The compression algorithm specified by the CompressionAlgorithm property is used. Currently, the only choice is "BZIP2".

Returns 1 for success, 0 for failure.

string CompressBytesENC(VARIANT data)

Same as CompressBytes, except an encoded string is returned. The encoding is controlled by the EncodingMode property, which can be set to "Base64", "QP" (for quoted-printable), or "Hex".

Returns a null on failure

VARIANT CompressString(string str)

Compresses a string and returns a byte array of the compressed data. For languages such as C#, VB.NET, Visual Basic 6, etc. the string input argument is Unicode. The Charset property controls the conversion of the Unicode string to a multibyte string before compression is applied. For example, if Charset is set to "iso-8859-1", then the input string argument is first converted from Unicode (2 bytes per char) to iso-8859-1 (1 byte per char) before compressing according to the CompressionAlgorithm property ("BZIP2"). If the Charset property is set to "unicode", then no character encoding conversion will happen, and the full Unicode string is compressed.

Returns 1 for success, 0 for failure.

string CompressStringENC(string str)

Compresses a string and returns an encoded string of the compressed data. For languages such as C#, VB.NET, Visual Basic 6, etc. the string input argument is Unicode. The Charset property controls the conversion of the Unicode string to a multibyte string before compression is applied. For example, if Charset is set to "iso-8859-1", then the input string argument is first converted from Unicode (2 bytes per char) to iso-8859-1 (1 byte per char) before compressing according to the CompressionAlgorithm property ("BZIP2"). If the Charset property is set to "unicode", then no character encoding conversion will happen, and the full Unicode string is compressed.

Compressed data is typically binary data which is not a printable string. This method encodes the output compressed data to a printable string according to the EncodingMode property, which can be set to "Base64", "QP" (for quoted-printable), or "Hex".

Returns a null on failure

bool CreateDetachedSignature(string inFilePath, string outSigFilePath)

Digitally signs a file and writes the digital signature to a separate output file (a PKCS#7 signature file). The input file (inFilePath) is unmodified. A certificate for signing must be specified by calling SetSigningCert or SetSigningCert2 prior to calling this method.

This method is equivalent to CreateP7S. The CreateP7S method was added to clarify the format of the signature file that is created.

Returns 1 for success, 0 for failure.

bool CreateP7M(string inFilename, string p7mFilename)

Digitally signs a file and creates a .p7m (PKCS #7 Message) file that contains both the signature and original file content. The input file (ARG1) is unmodified. A certificate for signing must be specified by calling SetSigningCert or SetSigningCert2 prior to calling this method.

Returns 1 for success, 0 for failure.

bool CreateP7S(string inFilename, string outP7sFilename)

Digitally signs a file and creates a .p7s (PKCS #7 Signature) signature file. The input file (inFilename) is unmodified. The output file ( outP7sFilename) contains only the signature and not the original data. A certificate for signing must be specified by calling SetSigningCert or SetSigningCert2 prior to calling this method.

Returns 1 for success, 0 for failure.

VARIANT Decode(string encodedStr, string encoding)

Decode binary data from base64, hex, quoted-printable, or URL-encoding. The encoding argument can be any of the following strings: "base64", "hex", "url", or "quoted-printable".

Returns 1 for success, 0 for failure.

string DecodeString(string inStr, string charset, string encoding)

To be documented soon...

VARIANT DecryptBytes(VARIANT data)

Decrypts a byte array and returns the unencrypted byte array. The property settings used when encrypting the data must match the settings when decrypting. Specifically, the CryptAlgorithm, CipherMode, PaddingScheme, KeyLength, IV, and SecretKey properties must match.

Returns 1 for success, 0 for failure.

VARIANT DecryptBytesENC(string str)

Decrypts string-encoded encrypted data and returns the unencrypted byte array. Data encrypted with EncryptBytesENC can be decrypted with this method. The property settings used when encrypting the data must match the settings when decrypting. Specifically, the EncodingMode, CryptAlgorithm, CipherMode, PaddingScheme, KeyLength, IV, and SecretKey properties must match.

Returns 1 for success, 0 for failure.

string DecryptEncoded(string encodedEncryptedData)

Encrypted data is passed to this method as an encoded string (base64, hex, etc.). This method first decodes the input data according to the EncodingMode property setting. It then decrypts and re-encodes using the EncodingMode setting, and returns the decrypted data in encoded string form.

Returns a null on failure

string DecryptString(VARIANT data)

The reverse of EncryptString.

Decrypts encrypted byte data and returns the original string. The property settings used when encrypting the string must match the settings when decrypting. Specifically, the Charset, CryptAlgorithm, CipherMode, PaddingScheme, KeyLength, IV, and SecretKey properties must match.

Returns a null on failure

string DecryptStringENC(string str)

The reverse of EncryptStringENC.

Decrypts string-encoded encrypted data and returns the original string. The property settings used when encrypting the string must match the settings when decrypting. Specifically, the Charset, EncodingMode, CryptAlgorithm, CipherMode, PaddingScheme, KeyLength, IV, and SecretKey properties must match.

Returns a null on failure

string Encode(VARIANT byteData, string encoding)

Encode binary data to base64, hex, quoted-printable, or URL-encoding. The encoding argument can be set to any of the following strings: "base64", "hex", "quoted-printable", or "url".

Returns a null on failure

string EncodeString(string inStr, string charset, string encoding)

To be documented soon...

VARIANT EncryptBytes(VARIANT data)

Encrypts a byte array. The minimal set of properties that should be set before encrypting are: CryptAlgorithm, SecretKey. Other properties that control encryption are: CipherMode, PaddingScheme, KeyLength, IV. When decrypting, all property settings must match otherwise garbled data is returned.

Returns 1 for success, 0 for failure.

string EncryptBytesENC(VARIANT data)

Encrypts a byte array and returns the encrypted data as an encoded (printable) string. The minimal set of properties that should be set before encrypting are: CryptAlgorithm, SecretKey, EncodingMode. Other properties that control encryption are: CipherMode, PaddingScheme, KeyLength, IV. When decrypting, all property settings must match otherwise garbled data is returned. The encoding of the string that is returned is controlled by the EncodingMode property, which can be set to "Base64", "QP", or "Hex".

Returns a null on failure

string EncryptEncoded(string str)

The input string is first decoded according to the encoding algorithm specified by the EncodingMode property (such as base64, hex, etc.) It is then encrypted according to the encryption algorithm specified by CryptAlgorithm. The resulting encrypted data is encoded (using EncodingMode) and returned.

Returns a null on failure

VARIANT EncryptString(string str)

Encrypts a string and returns the encrypted data as a byte array. The minimal set of properties that should be set before encrypting are: CryptAlgorithm, SecretKey, Charset. Other properties that control encryption are: CipherMode, PaddingScheme, KeyLength, IV. When decrypting, all property settings must match otherwise garbled data is returned. The Charset property controls the exact bytes that get encrypted. Languages such as VB.NET, C#, and Visual Basic work with Unicode strings, thus the input string is Unicode. If Unicode is to be encrypted (i.e. 2 bytes per character) then set the Charset property to "Unicode". To implicitly convert the string to another charset before the encryption is applied, set the Charset property to something else, such as "iso-8859-1", "Shift_JIS", "big5", "windows-1252", etc. The complete list of possible charsets is listed here:

us-ascii
unicode
unicodefffe
iso-8859-1
iso-8859-2
iso-8859-3
iso-8859-4
iso-8859-5
iso-8859-6
iso-8859-7
iso-8859-8
iso-8859-9
iso-8859-13
iso-8859-15
windows-874
windows-1250
windows-1251
windows-1252
windows-1253
windows-1254
windows-1255
windows-1256
windows-1257
windows-1258
utf-7
utf-8
utf-32
utf-32be
shift_jis
gb2312
ks_c_5601-1987
big5
iso-2022-jp
iso-2022-kr
euc-jp
euc-kr
macintosh
x-mac-japanese
x-mac-chinesetrad
x-mac-korean
x-mac-arabic
x-mac-hebrew
x-mac-greek
x-mac-cyrillic
x-mac-chinesesimp
x-mac-romanian
x-mac-ukrainian
x-mac-thai
x-mac-ce
x-mac-icelandic
x-mac-turkish
x-mac-croatian
asmo-708
dos-720
dos-862
ibm037
ibm437
ibm500
ibm737
ibm775
ibm850
ibm852
ibm855
ibm857
ibm00858
ibm860
ibm861
ibm863
ibm864
ibm865
cp866
ibm869
ibm870
cp875
koi8-r
koi8-u

Returns 1 for success, 0 for failure.

string EncryptStringENC(string str)

Encrypts a string and returns the encrypted data as an encoded (printable) string. The minimal set of properties that should be set before encrypting are: CryptAlgorithm, SecretKey, Charset, and EncodingMode. Other properties that control encryption are: CipherMode, PaddingScheme, KeyLength, IV. When decrypting (with DecryptStringENC), all property settings must match otherwise garbled data is returned. The Charset property controls the exact bytes that get encrypted. Languages such as VB.NET, C#, and Visual Basic work with Unicode strings, thus the input string is Unicode. If Unicode is to be encrypted (i.e. 2 bytes per character) then set the Charset property to "Unicode". To implicitly convert the string to another charset before the encryption is applied, set the Charset property to something else, such as "iso-8859-1", "Shift_JIS", "big5", "windows-1252", etc. (Refer to EncryptString for the complete list of charsets.)

The EncodingMode property controls the encoding of the string that is returned. It can be set to "Base64", "QP", or "Hex".

Returns a null on failure

string GenEncodedSecretKey(string password, string encoding)

To be documented soon.

Returns a null on failure

string GenRandomBytesENC(int numBytes)

Generates numBytes random bytes and returns them as an encoded string. The encoding, such as base64, hex, etc. is controlled by the EncodingMode property.

Returns a null on failure

VARIANT GenerateSecretKey(string str)

Hashes a string to a byte array that has the same number of bits as the current value of the KeyLength property. For example, if KeyLength is equal to 128 bits, then a 16-byte array is returned. This can be used to set the SecretKey property. In order to decrypt, the SecretKey must match exactly. To use "password-based" encryption, the password is passed to this method to generate a binary secret key that can then be assigned to the SecretKey property.

Returns 1 for success, 0 for failure.

string GetEncodedIV(string encoding)

Returns the initialization vector as an encoded string. The encoding argument can be set to any of the following strings: "base64", "hex", "quoted-printable", or "url".

Returns a null on failure

string GetEncodedKey(string encoding)

Returns the secret key as an encoded string. The encoding argument can be set to any of the following strings: "base64", "hex", "quoted-printable", or "url".

Returns a null on failure

string GetEncodedSalt(string encoding)

Returns the password-based encryption (PBE) salt bytes as an encoded string. The encoding argument can be set to any of the following strings: "base64", "hex", "quoted-printable", or "url".

Returns a null on failure

Chilkat.Cert GetLastCert()

Returns the last certificate used when decrypting data or verifying a signature. This is only valid when public-key encryption is used, and does not apply to symmetric algorithms such as Rijndael, Blowfish, or Twofish.

bool HashBeginBytes(VARIANT data)

Begin hashing a byte stream. Call this method to hash the 1st chunk. Additional chunks are hashed by calling HashMoreBytes 0 or more times followed by a final call to HashFinal (or HashFinalENC) to retrieve the result. The hash algorithm is selected by the HashAlgorithm property setting.

bool HashBeginString(string strData)

Begin hashing a text stream. Call this method to hash the 1st chunk. Additional chunks are hashed by calling HashMoreString 0 or more times followed by a final call to HashFinal (or HashFinalENC) to retrieve the result. The hash algorithm is selected by the HashAlgorithm property setting.

VARIANT HashBytes(VARIANT data)

Hashes a byte array. The hash algorithm to be used is controlled by the HashAlgorithm property, which can be set to "sha1", "sha384", "sha512", "md2", "md5", or "haval".

The HAVAL hash algorithm is affected by two other properties: HavalRounds and KeyLength. The HavalRounds may have values of 3, 4, or 5. The KeyLength may have values of 128, 160, 192, 224, or 256.

Returns 1 for success, 0 for failure.

string HashBytesENC(VARIANT data)

Hashes a byte array and returns an encoded (printable) string of the binary hash. The hash algorithm to be used is controlled by the HashAlgorithm property, which can be set to "sha1", "sha384", "sha512", "md2", "md5", or "haval". The encoding is controlled by the EncodingMode property, which can be set to "Base64", "QP", or "Hex".

Returns a null on failure

VARIANT HashFile(string filename)

Hashes a file. The hash algorithm to be used is controlled by the HashAlgorithm property, which can be set to "sha1", "sha384", "sha512", "md2", "md5", or "haval". The function returns the hash bytes. Any size file is supported because the file is hashed internally in streaming mode.

The HAVAL hash algorithm is affected by two other properties: HavalRounds and KeyLength. The HavalRounds may have values of 3, 4, or 5. The KeyLength may have values of 128, 160, 192, 224, or 256.

Returns 1 for success, 0 for failure.

string HashFileENC(string filename)

Hashes a file. The hash algorithm to be used is controlled by the HashAlgorithm property, which can be set to "sha1", "sha384", "sha512", "md2", "md5", or "haval". The function returns the hash as a string encoded according to the EncodingMode property. Any size file is supported because the file is hashed internally in streaming mode.

Returns a null on failure

VARIANT HashFinal()

Finalizes a multi-step hash computation and returns the hash bytes.

Returns 1 for success, 0 for failure.

string HashFinalENC()

Finalizes a multi-step hash computation and returns the hash bytes encoded according to the EncodingMode property setting.

Returns a null on failure

bool HashMoreBytes(VARIANT data)

Adds more bytes to the hash currently under computation. (See HashBeginBytes)

bool HashMoreString(string strData)

Adds more text to the hash currently under computation. (See HashBeginString)

VARIANT HashString(string str)

Hashes a string and returns a binary hash. The hash algorithm to be used is controlled by the HashAlgorithm property, which can be set to "sha1", "sha384", "sha512", "md2", "md5", or "haval". The Charset property controls the character encoding of the string that is hashed. Languages such as VB.NET, C#, and Visual Basic work with Unicode strings. If it is desired to hash Unicode directly (2 bytes/char) then set the Charset property to "Unicode". To implicitly convert to another charset before hashing, set the Charset property to the desired charset. For example, if Charset is set to "iso-8859-1", the input string is first implicitly converted to iso-8859-1 (1 byte per character) before hashing. The full list fo supported charsets is listed in the EncryptString method description.

Returns 1 for success, 0 for failure.

string HashStringENC(string str)

Hashes a string and returns an encoded (printable) string of the binary hash. The hash algorithm to be used is controlled by the HashAlgorithm property, which can be set to "sha1", "sha384", "sha512", "md2", "md5", or "haval". The Charset property controls the character encoding of the string that is hashed. Languages such as VB.NET, C#, and Visual Basic work with Unicode strings. If it is desired to hash Unicode directly (2 bytes/char) then set the Charset property to "Unicode". To implicitly convert to another charset before hashing, set the Charset property to the desired charset. For example, if Charset is set to "iso-8859-1", the input string is first implicitly converted to iso-8859-1 (1 byte per character) before hashing. The full list of supported charsets is listed in the EncryptString method description.
The encoding of the output string is controlled by the EncodingMode property, which can be set to "Base64", "QP", or "Hex".

The HAVAL hash algorithm is affected by two other properties: HavalRounds and KeyLength. The HavalRounds may have values of 3, 4, or 5. The KeyLength may have values of 128, 160, 192, 224, or 256.

Returns a null on failure

VARIANT HmacBytes(VARIANT inBytes)

Computes a keyed-Hash Message Authentication Code (HMAC or KHMAC), which is a type of message authentication code (MAC) calculated using a specific algorithm involving a cryptographic hash function in combination with a secret key. As with any MAC, it may be used to simultaneously verify both the data integrity and the authenticity of a message. Any iterative cryptographic hash function, such as MD5 or SHA-1, may be used in the calculation of an HMAC; the resulting MAC algorithm is termed HMAC-MD5 or HMAC-SHA-1 accordingly. The cryptographic strength of the HMAC depends upon the cryptographic strength of the underlying hash function, on the size and quality of the key and the size of the hash output length in bits.

The secret key is set by calling one of these methods prior to calling this method: SetHmacKeyBytes, SetHmacKeyEncoded, or SetHmacKeyString.

The hash algorithm is specified by the HashAlgorithm property.

Returns 1 for success, 0 for failure.

string HmacBytesENC(VARIANT inBytes)

Computes an HMAC using a secret key and hash algorithm. The result is encoded to a string using the encoding (base64, hex, etc.) specified by the EncodingMode property.

The secret key is set by calling one of these methods prior to calling this method: SetHmacKeyBytes, SetHmacKeyEncoded, or SetHmacKeyString.

The hash algorithm is specified by the HashAlgorithm property.

Returns a null on failure

VARIANT HmacString(string inText)

Computes an HMAC using a secret key and hash algorithm.

The secret key is set by calling one of these methods prior to calling this method: SetHmacKeyBytes, SetHmacKeyEncoded, or SetHmacKeyString.

The hash algorithm is specified by the HashAlgorithm property.

Returns 1 for success, 0 for failure.

string HmacStringENC(string inText)

Computes an HMAC using a secret key and hash algorithm. The result is encoded to a string using the encoding (base64, hex, etc.) specified by the EncodingMode property.

The secret key is set by calling one of these methods prior to calling this method: SetHmacKeyBytes, SetHmacKeyEncoded, or SetHmacKeyString.

The hash algorithm is specified by the HashAlgorithm property.

Returns a null on failure

VARIANT InflateBytes(VARIANT data)

The opposite of CompressBytes.

Returns 1 for success, 0 for failure.

VARIANT InflateBytesENC(string str)

The opposite of CompressBytesENC. The EncodingMode and CompressionAlgorithm properties should match what was used when compressing.

Returns 1 for success, 0 for failure.

string InflateString(VARIANT data)

The opposite of CompressString. The Charset and CompressionAlgorithm properties should match what was used when compressing.

Returns a null on failure

string InflateStringENC(string str)

The opposite of CompressStringENC. The Charset, EncodingMode, and CompressionAlgorithm properties should match what was used when compressing.

Returns a null on failure

bool IsUnlocked()

Returns true if the component is unlocked.

string MySqlAesDecrypt(string strEncryptedHex, string strPassword)

Matches MySQL's AES_DECRYPT function. strEncryptedHex is a hex-encoded string of the AES encrypted data. The return value is the original unencrypted string.

Returns a null on failure

string MySqlAesEncrypt(string strData, string strPassword)

Matches MySQL's AES_ENCRYPT function. The return value is a hex-encoded string of the encrypted data. The equivalent call in MySQL would look like this: HEX(AES_ENCRYPT('The quick brown fox jumps over the lazy dog','password'))

Returns a null on failure

VARIANT OpaqueSignBytes(VARIANT data)

Digitally signs a byte array and returns the opaque digital signature. A certificate must be set by calling SetSigningCert prior to calling this method.

Returns 1 for success, 0 for failure.

string OpaqueSignBytesENC(VARIANT data)

Digitally signs a byte array and returns the opaque digital signature encoded as a printable string. A certificate must be set by calling SetSigningCert prior to calling this method. The EncodingMode property controls the output encoding, which can be "Base64", "QP", or "Hex".

Returns a null on failure

VARIANT OpaqueSignString(string str)

Digitally signs a string and returns the opaque digital signature. A certificate must be set by calling SetSigningCert prior to calling this method. The Charset property controls the character encoding of the string that is signed. (Languages such as VB.NET, C#, and Visual Basic work with Unicode strings.) To sign Unicode data (2 bytes per char), set the Charset property to "Unicode". To implicitly convert the string to a mutlibyte charset such as "iso-8859-1", "Shift_JIS", "utf-8", or something else, then set the Charset property to the name of the charset before signing. The complete list of charsets is listed in the EncryptString method description.

Returns 1 for success, 0 for failure.

string OpaqueSignStringENC(string str)

Digitally signs a string and returns the opaque digital signature as an encoded string. A certificate must be set by calling SetSigningCert prior to calling this method. The Charset property controls the character encoding of the string that is signed. (Languages such as VB.NET, C#, and Visual Basic work with Unicode strings.) To sign Unicode data (2 bytes per char), set the Charset property to "Unicode". To implicitly convert the string to a mutlibyte charset such as "iso-8859-1", "Shift_JIS", "utf-8", or something else, then set the Charset property to the name of the charset before signing. The complete list of charsets is listed in the EncryptString method description.

The encoding of the output string is controlled by the EncodingMode property, which can be set to "Base64", "QP", or "Hex".

Returns a null on failure

VARIANT OpaqueVerifyBytes(VARIANT data)

Verifies an opaque signature and returns the original data. If the signature verification fails, the returned data will be 0 bytes in length.

Returns 1 for success, 0 for failure.

VARIANT OpaqueVerifyBytesENC(string str)

Verifies an opaque signature (encoded in string form) and returns the original data. If the signature verification fails, the returned data will be 0 bytes in length.

Returns 1 for success, 0 for failure.

string OpaqueVerifyString(VARIANT data)

Verifies an opaque signature and returns the original string. If the signature verification fails, the returned string will be 0 characters in length.

Returns a null on failure

string OpaqueVerifyStringENC(string str)

Verifies an opaque signature (encoded in string form) and returns the original data string. If the signature verification fails, the returned string will be 0 characters in length.

Returns a null on failure

string Pbkdf1(string password, string charset, string hashAlg, string salt, int iterationCount, int outputKeyBitLen, string encoding)

Implements the PBKDF1 algorithm (Password Based Key Derivation Function #1). The password is converted to the character encoding represented by charset before being passed (internally) to the key derivation function. The hashAlg may be "md5", "sha1", "md2", etc. The salt should be random data at least 8 bytes (64 bits) in length. (The GenRandomBytesENC method is good for generating a random salt value.) The iterationCount should be no less than 1000. The length (in bits) of the derived key output by this method is controlled by outputKeyBitLen. The encoding argument may be "base64", "hex", etc. It controls the encoding of the output, and the expected encoding of the salt. The derived key is returned.

Returns a null on failure

string Pbkdf2(string password, string charset, string hashAlg, string salt, int iterationCount, int outputKeyBitLen, string encoding)

Implements the PBKDF2 algorithm (Password Based Key Derivation Function #2). The password is converted to the character encoding represented by charset before being passed (internally) to the key derivation function. The hashAlg may be "md5", "sha1", "md2", etc. The salt should be random data at least 8 bytes (64 bits) in length. (The GenRandomBytesENC method is good for generating a random salt value.) The iterationCount should be no less than 1000. The length (in bits) of the derived key output by this method is controlled by outputKeyBitLen. The encoding argument may be "base64", "hex", etc. It controls the encoding of the output, and the expected encoding of the salt. The derived key is returned.

Returns a null on failure

void RandomizeIV()

Sets the initialization vector to a random value.

void RandomizeKey()

Sets the secret key to a random value.

string ReEncode(string encodedData, string fromEncoding, string toEncoding)

Provides a means for converting from one encoding to another (such as base64 to hex). This is helpful for programming environments where byte arrays are a real pain-in-the-***. The fromEncoding and toEncoding may be "base64", "hex", "quoted-printable" (or "qp"), or "url".

Returns a null on failure

VARIANT ReadFile(string filename)

Convenience method to read an entire file and return as a byte array.

Returns 1 for success, 0 for failure.

bool SaveLastError(string b1)

Saves the last error information to an XML formatted file.

void SetCSP(Chilkat.CSP iCSP)

Allows for any Cryptographic Service Provider to be used with public-key encryption.

bool SetDecryptCert(Chilkat.Cert cert)

Sets the digital certificate to be used for decryption when the CryptAlgorithm property is set to "PKI". A private key is required for decryption. Because this method only specifies the certificate, a prerequisite is that the certificate w/ private key must have been pre-installed on the computer. Private keys are stored in the Windows Protected Store (either a user account specific store, or the system-wide store). The Chilkat component will automatically locate and find the certificate's corresponding private key from the protected store when decrypting.

Returns 1 for success, 0 for failure.

bool SetDecryptCert2(Chilkat.Cert cert, Chilkat.PrivateKey key)

Sets the digital certificate to be used for decryption when the CryptAlgorithm property is set to "PKI". The private key is supplied in the 2nd argument to this method, so there is no requirement that the certificate be pre-installed on a computer before decrypting (if this method is called).

Returns 1 for success, 0 for failure.

void SetEncodedIV(string ivStr, string encoding)

Sets the initialization vector from an encoded string. The encoding argument can be set to any of the following strings: "base64", "hex", "quoted-printable", "ascii", or "url".

void SetEncodedKey(string keyStr, string encoding)

Sets the secret key from an encoded string. The encoding argument can be set to any of the following strings: "base64", "hex", "quoted-printable", "ascii", or "url".

void SetEncodedSalt(string saltStr, string encoding)

Sets the password-based encryption (PBE) salt bytes from an encoded string. The encoding argument can be set to any of the following strings: "base64", "hex", "quoted-printable", "ascii", or "url".

void SetEncryptCert(Chilkat.Cert iCert)

Tells the encryption library to use a specific digital certificate for public-key encryption. To encrypt with multiple certificates, call AddEncryptCert once for each certificate. (Calling this method is the equivalent of calling ClearEncryptCerts followed by AddEncryptCert.)

void SetHmacKeyBytes(VARIANT keyBytes)

Sets the secret key to be used for one of the HMAC methods.

void SetHmacKeyEncoded(string key, string encoding)

Sets the secret key to be used for one of the HMAC methods. The encoding can be set to any of the following strings: "base64", "hex", "quoted-printable", or "url".

void SetHmacKeyString(string key)

Sets the secret key to be used for one of the HMAC methods.

void SetSecretKeyViaPassword(string password)

Accepts a password string and (internally) generates a binary secret key of the appropriate bit length and sets the SecretKey property. This method should only be used if you are using Chilkat for both encryption and decryption because the password-to-secret-key algorithm would need to be identical for the decryption to match the encryption.

void SetSigningCert(Chilkat.Cert iCert)

Tells the encryption library to use a specific digital certificate for digital signature creation.

void SetVerifyCert(Chilkat.Cert iCert)

Sets the digital certificate to be used in verifying a signature.

VARIANT Shorten(VARIANT inData, int numBytes)

Chops N bytes from the end of a byte array. Accepts a Variant, which could be anything (internally) but always returns a Variant containing a byte array.

Returns 1 for success, 0 for failure.

VARIANT SignBytes(VARIANT data)

Digitally signs a byte array and returns the detached digital signature. A certificate must be set by calling SetSigningCert prior to calling this method.

Returns 1 for success, 0 for failure.

string SignBytesENC(VARIANT data)

Digitally signs a byte array and returns the detached digital signature encoded as a printable string. A certificate must be set by calling SetSigningCert prior to calling this method. The EncodingMode property controls the output encoding, which can be "Base64", "QP", or "Hex".

Returns a null on failure

VARIANT SignString(string str)

Digitally signs a string and returns the detached digital signature. A certificate must be set by calling SetSigningCert prior to calling this method. The Charset property controls the character encoding of the string that is signed. (Languages such as VB.NET, C#, and Visual Basic work with Unicode strings.) To sign Unicode data (2 bytes per char), set the Charset property to "Unicode". To implicitly convert the string to a mutlibyte charset such as "iso-8859-1", "Shift_JIS", "utf-8", or something else, then set the Charset property to the name of the charset before signing. The complete list of charsets is listed in the EncryptString method description.

Returns 1 for success, 0 for failure.

string SignStringENC(string str)

Digitally signs a string and returns the PKCS7 detached digital signature as an encoded string. A certificate must be set by calling SetSigningCert prior to calling this method. The Charset property controls the character encoding of the string that is signed. (Languages such as VB.NET, C#, and Visual Basic work with Unicode strings.) To sign Unicode data (2 bytes per char), set the Charset property to "Unicode". To implicitly convert the string to a mutlibyte charset such as "iso-8859-1", "Shift_JIS", "utf-8", or something else, then set the Charset property to the name of the charset before signing. The complete list of charsets is listed in the EncryptString method description.

The encoding of the output string is controlled by the EncodingMode property, which can be set to "Base64", "QP", or "Hex".

Returns a null on failure

VARIANT StringToBytes(string inStr, string charset)

Convert a String to a VARIANT containing a byte array where the characters are encoded according to the charset specified.

Returns 1 for success, 0 for failure.

string TrimEndingWith(string inStr, string ending)

Trim a string ending with a specific substring until the string no longer ends with that substring.

Returns a null on failure

bool UnlockComponent(string b1)

Unlocks the component. This must be called once prior to calling any other method.

bool VerifyBytes(VARIANT data, VARIANT signature)

Verifies a byte array against a digital signature and returns true if the byte array is unaltered.

bool VerifyBytesENC(VARIANT data, string encodedSig)

Verifies a byte array against a string-encoded digital signature and returns true if the byte array is unaltered. This method can be used to verify a signature produced by SignBytesENC. The EncodingMode property must be set prior to calling to match the encoding of the digital signature string ("Base64", "QP", or "Hex").

bool VerifyDetachedSignature(string inFilename, string p7sFilename)

Verifies a .p7s (PKCS #7 Signature) against the original file (or exact copy of it). If the inFilename has not been modified, the return value is true, otherwise it is false. This method is equivalent to VerifyP7S.

bool VerifyP7M(string p7mFilename, string outFilename)

Verifies a .p7m file and extracts the original file from the .p7m. Returns true if the signature is valid and the contents are unchanged. Otherwise returns false.

bool VerifyP7S(string inFilename, string p7sFilename)

Verifies a .p7s (PKCS #7 Signature) against the original file (or exact copy of it). If the inFilename has not been modified, the return value is true, otherwise it is false.

bool VerifyString(string str, VARIANT signature)

Verifies a string against a binary digital signature and returns true if the string is unaltered. This method can be used to verify a signature produced by SignString. The Charset property must be set to the charset that was used when creating the signature.

bool VerifyStringENC(string str, string encodedSig)

Verifies a string against a string-encoded digital signature and returns true if the string is unaltered. This method can be used to verify a signature produced by SignStringENC. The Charset and EncodingMode properties must be set to the same values that were used when creating the signature.

bool WriteFile(string filename, VARIANT binaryData)

Convenience method to write an entire byte array to a file.