C# VB.NET ASP.NET Encryption .NET Component

Chilkat .NET Components for Email, Zip Compression, Encryption, XML, S/MIME, and Character Encoding Conversion

Chilkat::Crypt Class

An encryption class providing: (1) Easy-to-use RSA public-key encryption and decryption. (2) Digital signature creation and validation. (3) 128, 192, and 256-bit AES Rijndael Encryption and Decryption. (4) 128, 192, and 256-bit Blowfish and Twofish Encryption and Decryption. (5) SHA-1, Digest MD5 and MD2 Hashing. (6) Base64 and Quoted-Printable conversion. (7) Supports any Cryptographic Service Provider, including Smart Card vendors. (8) Integrated Zip-and-Encrypt functionality such that Chilkat Zip.NET does not need to be purchased. (9) Licensed by the US Government for export under License Exception ENC Sections 740.17 (A) and (B)(3). Export Classification: 5D002

Base Classes: Object

		Properties	Description
		EncryptCertSubject	An easy way of specifying the certificate to be used for RSA public-key encryption. This string should match one of the subject fields in a certificate, such as the common name (CN), email address (E), organization (O), organizational unit (OU), locality (L), state (ST), or country (C). In most cases, it is easiest to identify the certificate uniquely by specifying the email address. Chilkat Crypt.NET will automatically attempt to locate and use a certificate mathing this property's value. If a certificate cannot be found, the encryption will fail. Otherwise, the full certificate subject will be saved in LastCertSubject after a RSA public-key encryption operation.
		IV	Initialization vector for the Rijndael and Twofish symmetric encryption algorithms. This byte array should be exactly 16-bytes long, and if specified, the same IV needs to be used in decrypting as that which was used to encrypt the data. It is not necessary to set an IV to use Rijndael or Twofish.
		KeyLength	The length of the symmetric algorithm encryption key, in bits. The default is 128. The key length must be 128, 192, and 256 bits. Symmetric algorithms include Rijndael (AES), Twofish, and Blowfish.
		LastAlgorithm	Contains the name of the last encryption algorithm used.
		LastCertSubject	Contains the full subject of the last certificate used for RSA public-key encryption or digital signature creation.
		LastError	An XML-formatted string containing error information, if any, of the last method call.
		SecretKey	The symmetric algorithm secret key. To decrypt successfully, the secret key and key length must match the values used during encryption.
		SigningCertSubject	An easy way of specifying the certificate to be used for digital signature creation. This string should match one of the subject fields in a certificate, such as the common name (CN), email address (E), organization (O), organizational unit (OU), locality (L), state (ST), or country (C). In most cases, it is easiest to identify the certificate uniquely by specifying the email address. Chilkat Crypt.NET will automatically attempt to locate and use a certificate mathing this property's value. If a certificate cannot be found, the signing will fail. Otherwise, the full certificate subject will be saved in LastCertSubject after a digital signature is created.
		UseStandardSearchCertStores	Tells Chilkat Crypt.NET to search the following certificate stores in this order: (1) Local Machine Certificate Store: This exists on every MS Windows system and is located in the registry. These certificates are shared among all users of the system. (2) Chilkat Email.NET Certificate Store: This is the certificate store used with Chilkat Email.NET, and is located in the registry under HKEY_LOCAL_MACHINE:Software/Chilkat/SystemCertificates (3) Microsoft AddressBook: This is the certificate store used by Microsoft Outlook and is located in the registry under HKEY_CURRENT_USER:Software/Microsoft/SystemCertificates/AddressBook. (4) Current User Certificate Store: This exists on every MS Windows system and is located in the registry. Each user has his own private certificate store.
		Version	The version of the component, such as "2.0.0".

		Methods	Description
		AddSearchCertStore	Add a certificate store to the search path for locating a digital certificate.
		CreateSignature	Creates a detached digital signature for a block of memory data. Returns the digital signature as a byte array.
		CreateSignatureStr	Creates a detached digital signature for a string. Returns the digital signature as a byte array.
		DecodeBase64	Decode a Base64 string and return the original data as a byte array.
		DecodeQuotedPrintable	Decodes a string encoded in the quoted-printable format. Returns the original data as a byte array.
		DecryptAndUnzip	In a single operation, decrypts and unzips a block of memory that was previously zipped and encrypted using the ZipAndEncrypt method. A NULL is returned on failure.
		DecryptAndUnzipStr	In a single operation, decrypts and unzips a block of memory that was previously zipped and encrypted using the ZipAndEncryptStr method. The result is returned as a string. A NULL is returned on failure.
		Decrypt	Decrypt a block of memory data. If the decryption failed, a NULL value is returned.
		DecryptStr	Decrypt a block of memory data and return a string. If the decryption failed, a NULL value is returned.
		DigestMD2	Create an MD2 Digest of a block of memory data.
		DigestMD2Str	Create an MD2 Digest of a string.
		DigestMD5	Create an MD5 Digest of a block of memory data.
		DigestMD5Str	Create an MD5 Digest of a string.
		EncodeBase64	Base64 encode a block of memory data.
		EncodeBase64Str	Base64 encode a string in memory.
		EncodeQuotedPrintable	Quoted-printable encode a block of memory data.
		EncodeQuotedPrintableStr	Quoted-printable encode a string in memory.
		Encrypt	Encrypt a block of memory data. Returns the encrypted data as a byte array.
		EncryptStr	Encrypt a string in memory. Returns the encrypted data as a byte array.
		HashSHA1	Create a SHA-1 hash of a block of memory data
		HashSHA1Str	Create a SHA-1 hash of a string in memory
		IsUnlocked	Returns True if the class is already unlocked, otherwise returns False.
		SaveLastError	Saves the error log to an XML file
		SetAlgorithmBlowfish	Sets the encryption algorithm to Blowfish
		SetAlgorithmRijndael	Sets the encryption algorithm to Rijndael, which is the AES standard encryption algorithm
		SetAlgorithmRSA	Sets the encryption algorithm to to RSA public-key encryption.
		SetAlgorithmTwofish	Sets the encryption algorithm to Twofish
		SetCSP	Sets the cryptographic service provider (CSP) to be used for public-key encryption. In most cases this is not called, but it can be used to control the encryption algorithm, key length, hashing algorithm, etc., or to use a CSP from a 3rd party, such as a smart card vendor.
		SetEncryptCertificate	Sets the certificate that will be used for public-key RSA encryption.
		SetSecretKeyViaPassPhrase	Generates a secret key from a pass-phrase. This method sets the SecretKey property indirectly.
		SetSigningCertificate	Sets the certificate that will be used for digital signature creation.
		UnlockComponent	Unlocks the component allowing for the full functionality to be used. Returns true if the unlock code is valid.
		VerifySignature	Verify memory data against a digital signature. Returns True if the data was verified to be unaltered. Returns false if the data was altered, or if the signature could not be verified for other reasons.
		VerifySignatureStr	Verify a string against a digital signature. Returns True if the string was verified to be unaltered. Returns false if the string was altered, or if the signature could not be verified for other reasons.
		ZipAndEncrypt	First Zip compresses a block of memory data and then encrypts it. The memory data can be restored by calling DecryptAndUnzip.
		ZipAndEncryptStr	First Zip compresses a string and then encrypts it. The string can be restored by calling DecryptAndUnzipStr.