Windows Default Key Generation Algorithm Calg Md5
- Windows Default Key Generation Algorithm Calg Md5 Error
- Windows Default Key Generation Algorithm Calg Md5 File
The following table lists the algorithms supported by the Microsoft Advanced Encryption Standard (AES) Cryptographic Provider.
Algorithm ID | Description | Comments |
---|---|---|
CALG_3DES | Triple DES. | Key length: 168 bits. Default mode: Cipher block chaining. Block size: 64 bits. No salt allowed. |
CALG_3DES_112 | Two-key triple DES encryption. | Key length: 112 bits. Default mode: Cipher block chaining. Block size: 64 bits. No salt allowed. |
CALG_AES_128 | AES block encryption algorithm. | Key length: 128 bits. |
CALG_AES_192 | AES block encryption algorithm. | Key length: 192 bits. |
CALG_AES_256 | AES block encryption algorithm. | Key length: 256 bits. |
CALG_DES | DES encryption. | Key length: 56 bits. Default mode: Cipher block chaining. Block size: 64 bits. No salt allowed. |
CALG_HMAC | MAC keyed-hash algorithm. | HMAC computation. |
CALG_MAC | Message Authentication Code (MAC) keyed hash algorithm. | Block cipher MAC. |
CALG_MD2 | MD2 hashing algorithm. | For more information, see MD2 algorithm. |
CALG_MD5 | MD5 hashing algorithm. | For more information, see MD5 algorithm. |
CALG_RC2 | RC2 block encryption algorithm. | Key length: 128 bits. Default mode: Cipher block chaining. Block size: 64 bits. Salt length: Can be set. |
CALG_RC4 | RC4 stream encryption algorithm. | Key length: 128 bits. Salt length: Can be set. |
CALG_RSA_KEYX | RSA public key exchange algorithm. | Key length: Can be set, 384 bits to 16,384 bits in 8-bit increments. Default key length: 1,024 bits. |
CALG_RSA_SIGN | RSA public key signature algorithm. | Key length: Can be set, 384 bits to 16,384 bits in 8-bit increments. Default key length: 1,024 bits. Signature conforms to PKCS #6. |
CALG_SHA | SHA hashing algorithm. | For more information, see Secure Hash Algorithm. |
CALG_SHA1 | Same as CALG_SHA. | For more information, see Secure Hash Algorithm. |
CALG_SHA_256 | SHA hashing algorithm. | Key length: 256 bits.Windows XP: This algorithm is not supported. |
CALG_SHA_384 | SHA hashing algorithm. | Key length: 384 bits.Windows XP: This algorithm is not supported. |
CALG_SHA_512 | SHA hashing algorithm. | Key length: 512 bits.Windows XP: This algorithm is not supported. |
CALG_SSL3_SHAMD5 | SSL3 client authentication algorithm. | For more information, see Creating a CALG_SSL3_SHAMD5 Hash. |
A cryptosystem should be secure even if everything about the system, except the key, is public knowledge. This is a great asumption and it is used in the xkcd comic. Even if you know everything about how I generate passwords (including the list of words I use) there are still 2^44 possible passwords. The following example creates and hashes a session key that can be used to encrypt a message, text, or file. This example also shows using the following CryptoAPI functions: CryptAcquireContext to acquire a cryptographic service provider. CryptCreateHash to create an empty hash object. CryptGenKey to create a random session key.
Password Encryption
Strong password encryptionprovides an early barrier against attack. Solaris software provides four passwordencryption algorithms. The two MD5 algorithmsand the Blowfish algorithm providemore robust password encryption than the UNIX algorithm.
Algorithm Man Page. The MD5 algorithm that is compatible with MD5 algorithms on BSD and Linux systems. Cryptbsdmd5(5) 2a. The Blowfish algorithm that is compatible with the Blowfish algorithm on BSD systems. Cryptbsdbf(5) md5. The Sun MD5 algorithm, which is considered stronger than the BSD and Linux version of MD5. Cryptsunmd5(5) 5. The SHA256 algorithm.
Password Algorithm Identifiers
You specify the algorithms configuration for your site in the /etc/security/policy.conf file. In the policy.conf file,the algorithms are named by their identifier, as shown in the following table.
Table 2–1 Password Encryption AlgorithmsIdentifier | Description | Algorithm Man Page |
---|---|---|
1 | The MD5 algorithm that is compatible with MD5 algorithms on BSDand Linux systems. | |
2a | The Blowfish algorithm that is compatible with the Blowfish algorithmon BSD systems. | |
md5 | The Sun MD5 algorithm, which is considered stronger than the BSDand Linux version of MD5. | |
5 | The SHA256 algorithm. SHA stands for Secure Hash Algorithm. Thisalgorithm is a member of the SHA-2 family. SHA256 supports 255-character passwords. | |
6 | The SHA512 algorithm. Command to generate ssh key on mac. | |
__unix__ | The traditional UNIX encryption algorithm. Thisalgorithm is the default module in the policy.conf file. |
Algorithms Configuration in the policy.conf File
The following shows the default algorithms configuration in the policy.conf file:
When you change the value for CRYPT_DEFAULT, the passwords of new users are encrypted with the algorithm thatis associated with the new value. When current users change their passwords,how their old password was encrypted affects which algorithm is used to encryptthe new password.
For example, assume that CRYPT_ALGORITHMS_ALLOW=1,2a,md5,5,6 and CRYPT_DEFAULT=1. The following table shows which algorithm wouldbe used to generate the encrypted password.
Windows Default Key Generation Algorithm Calg Md5 Error
Identifier = Password Algorithm | Explanation | |
---|---|---|
Initial Password | Changed Password | |
1 = crypt_bsdmd5 | Uses same algorithm /cisco-crypto-key-generate-rsa-command.html. | The 1 identifier is also the value of CRYPT_DEFAULT. The user's password continues to be encrypted with the crypt_bsdmd5 algorithm. |
2a = crypt_bsdbf | Uses same algorithm | The 2a identifier is in the CRYPT_ALGORITHMS_ALLOW list. Therefore, the new password is encrypted with the crypt_bsbdf algorithm. |
md5 = crypt_md5 | Uses same algorithm | The md5 identifier is in the CRYPT_ALGORITHMS_ALLOW list. Therefore, the new password is encrypted with the crypt_md5 algorithm. |
5 = crypt_sha256 | Uses same algorithm | The 5 identifier is in the CRYPT_ALGORITHMS_ALLOW list. Therefore, the new password is encrypted with the crypt_sha256 algorithm. |
6 = crypt_sha512 | Uses same algorithm | The 6 identifier is in the CRYPT_ALGORITHMS_ALLOW list. Therefore, the new password is encrypted with the crypt_sha512 algorithm. |
__unix__ = crypt_unix | Uses crypt_bsdmd5 algorithm | The __unix__ identifier is not in the CRYPT_ALGORITHMS_ALLOW list. Therefore, the crypt_unix algorithm cannotbe used. The new password is encrypted with the CRYPT_DEFAULT algorithm. |
Windows Default Key Generation Algorithm Calg Md5 File
For more information on configuring the algorithm choices, see the policy.conf(4) man page.To specify password encryption algorithms, see Changing the Password Algorithm (Task Map).