1. Aes Generate Key From Password Code
  2. Create Aes Key
  3. Aes Generate Key From Password Windows 7

Use ENCRYPT PASSWORD to encrypt a password that is used in an Oracle GoldenGate parameter file or command.

Syntax

Use the OpenSSL command-line tool, which is included with the Master Data Engine, to generate AES 128-, 192-, or 256-bit keys. The madpwd3 utility is used to create the password. Jul 28, 2018 Now that we’ve covered that part, let’s move on to how you can use Powershell to (1) generate and store a 256-bit AES key, (2) encrypt the password for a User Account using that AES key, and (3) use that AES encrypted password in a script (to authenticate with a mail server, in this case).

password

The login password. Do not enclose the password within quotes. If the password is case-sensitive, type it that way.

AES128 AES192 AES256 BLOWFISH

Specifies the encryption algorithm to use.

  • AES128 uses the AES-128 cipher, which has a key size of 128 bits.

  • AES192 uses the AES-192 cipher, which has a key size of 192 bits.

  • AES256 uses the AES-256 cipher, which has a key size of 256 bits.

  • BLOWFISH uses Blowfish encryption with a 64-bit block size and a variable-length key size from 32 bits to 128 bits. Use BLOWFISH only for backward compatibility with earlier Oracle GoldenGate versions.

If no algorithm is specified, AES128 is the default for all database types except DB2 on z/OS and NonStop SQL/MX, where BLOWFISH is the default. AES is not supported for those platforms.

All of the AES ciphers have a 128-bit block size.

To use AES encryption for any database other than Oracle, the path of the lib sub-directory of the Oracle GoldenGate installation directory must be specified as an environment variable before starting any processes:

  • UNIX: Specify the path as an entry to the LD_LIBRARY_PATH or SHLIB_PATH variable. For example:

  • Windows: Add the path to the PATH variable.

You can use the SETENV parameter to set it as a session variable for the process.

ENCRYPTKEY {key_name DEFAULT}

Specifies the encryption key.

key_name

Specifies the logical name of a user-created encryption key in a local ENCKEYS lookup file. The key name is used to look up the actual key in the ENCKEYS file. A user-created key and an associated ENCKEYS file is required when using AES encryption; optional, but recommended, for Blowfish encryption. To use key_name, generate the key with KEYGEN or another utility, then store it in an ENCKEYS file on the source and target systems. For more information, see the security guidelines in the Administering Oracle GoldenGate for Windows and UNIX.

DEFAULT

Directs Oracle GoldenGate to generate a random key that is stored in the trail so that decryption can be performed by the downstream process. This type of key is insecure and should not be used in a production environment. Use this option only when BLOWFISH is specified. ENCRYPT PASSWORD returns an error if DEFAULT is used with any AES algorithm.

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Creating and managing keys is an important part of the cryptographic process. Symmetric algorithms require the creation of a key and an initialization vector (IV). The key must be kept secret from anyone who should not decrypt your data. The IV does not have to be secret, but should be changed for each session. Asymmetric algorithms require the creation of a public key and a private key. The public key can be made public to anyone, while the private key must known only by the party who will decrypt the data encrypted with the public key. This section describes how to generate and manage keys for both symmetric and asymmetric algorithms.

Symmetric Keys

The symmetric encryption classes supplied by the .NET Framework require a key and a new initialization vector (IV) to encrypt and decrypt data. Whenever you create a new instance of one of the managed symmetric cryptographic classes using the parameterless constructor, a new key and IV are automatically created. Anyone that you allow to decrypt your data must possess the same key and IV and use the same algorithm. Generally, a new key and IV should be created for every session, and neither the key nor IV should be stored for use in a later session.

To communicate a symmetric key and IV to a remote party, you would usually encrypt the symmetric key by using asymmetric encryption. Sending the key across an insecure network without encrypting it is unsafe, because anyone who intercepts the key and IV can then decrypt your data. For more information about exchanging data by using encryption, see Creating a Cryptographic Scheme.

The following example shows the creation of a new instance of the TripleDESCryptoServiceProvider class that implements the TripleDES algorithm.

When the previous code is executed, a new key and IV are generated and placed in the Key and IV properties, respectively.

Sometimes you might need to generate multiple keys. In this situation, you can create a new instance of a class that implements a symmetric algorithm and then create a new key and IV by calling the GenerateKey and GenerateIV methods. The following code example illustrates how to create new keys and IVs after a new instance of the symmetric cryptographic class has been made.

When the previous code is executed, a key and IV are generated when the new instance of TripleDESCryptoServiceProvider is made. Another key and IV are created when the GenerateKey and GenerateIV methods are called.

Aes Generate Key From Password

Asymmetric Keys

The .NET Framework provides the RSACryptoServiceProvider and DSACryptoServiceProvider classes for asymmetric encryption. These classes create a public/private key pair when you use the parameterless constructor to create a new instance. Asymmetric keys can be either stored for use in multiple sessions or generated for one session only. While the public key can be made generally available, the private key should be closely guarded.

Aes Generate Key From Password Code

A public/private key pair is generated whenever a new instance of an asymmetric algorithm class is created. After a new instance of the class is created, the key information can be extracted using one of two methods:

  • The ToXmlString method, which returns an XML representation of the key information.

  • The ExportParameters method, which returns an RSAParameters structure that holds the key information.

Both methods accept a Boolean value that indicates whether to return only the public key information or to return both the public-key and the private-key information. An RSACryptoServiceProvider class can be initialized to the value of an RSAParameters structure by using the ImportParameters method.

Aes generate key from password windows 7

Create Aes Key

Asymmetric private keys should never be stored verbatim or in plain text on the local computer. If you need to store a private key, you should use a key container. For more on how to store a private key in a key container, see How to: Store Asymmetric Keys in a Key Container.

Aes Generate Key From Password Windows 7

The following code example creates a new instance of the RSACryptoServiceProvider class, creating a public/private key pair, and saves the public key information to an RSAParameters structure.

See also

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