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User Commands mac(1)
NAME
mac - calculate message authentication codes of the input
SYNOPSIS
/usr/bin/mac -l | [-v] -a algorithm [-k keyfile] [file...]
DESCRIPTION
The mac utility calculates the message authentication code
(MAC) of the given file or files or stdin using the algo-
rithm specified.
If more than one file is given, each line of output is the
MAC of a single file.
OPTIONS
The following options are supported:
-a algorithm Specifies the name of the algorithm to use
during the encryption or decryption process.
See USAGE, Algorithms for details. Note:
Algorithms for producing general length MACs
are not supported.
-k keyfile Specifies the file containing the key value
for the encryption algorithm. Each algorithm
has specific key material requirements, as
stated in the PKCS#11 specification. If -k
is not specified, mac prompts for key
material using getpassphrase(3C).
For information on generating a key file,
see dd(1M) or System Administration Guide:
Security Services.
-l Displays the list of algorithms available on
the system. This list can change depending
on the configuration of the cryptographic
framework. The keysizes are displayed in
bits.
-v Provides verbose information.
USAGE
SunOS 5.10 Last change: 8 Nov 2005 1
User Commands mac(1)
Algorithms
The supported algorithms are displayed with the -l option.
These algorithms are provided by the cryptographic frame-
work. Each supported algorithm is an alias to the most com-
monly used and least restricted version of a particular
algorithm type. For example, md5_hmac is an alias to
CKM_MD5_HMAC.
These aliases are used with the -a option and are case-
sensitive.
Passphrase
When the -k option is not used during encryption and decryp-
tion tasks, the user is prompted for a passphrase. The
passphrase is manipulated into a more secure key using the
PBKDF2 algorithm specified in PKCS #5.
EXAMPLES
Example 1: Listing Available Algorithms
The following example lists available algorithms:
example$ mac -l
Algorithm Keysize: Min Max
-----------------------------------
des_mac 64 64
sha1_hmac 8 512
md5_hmac 8 512
sha256_hmac 8 512
sha384_hmac 8 1024
sha512_hmac 8 1024
Example 2: Getting the Message Authentication Code
The following example gets the message authentication code
for a file:
example$ mac -v -k mykey -a sha1_hmac /export/foo
sha1_hmac (/export/foo) = 913ced311df10f1708d9848641ca8992f4718057
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
SunOS 5.10 Last change: 8 Nov 2005 2
User Commands mac(1)
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWcsu |
|_____________________________|_____________________________|
| Interface Stability | Evolving |
|_____________________________|_____________________________|
SEE ALSO
digest(1), dd(1M), getpassphrase(3C), libpkcs11(3LIB),
attributes(5), pkcs11_softtoken(5)
System Administration Guide: Security Services
RSA PKCS#11 v2.20 and RSA PKCS#5 v2.0,
http://www.rsasecurity.com
SunOS 5.10 Last change: 8 Nov 2005 3
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This page was generated on Wed Sep 12 11:25:04 GMT 2007
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