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mac(1)				 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 algorithm 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	speci‐
		       fication.  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 sys‐
		       tem. This list can change depending on  the  configura‐
		       tion  of	 the cryptographic framework. The keysizes are
		       displayed in bits.

       -v	       Provides verbose information.

USAGE
   Algorithms
       The supported algorithms are displayed with the -l option. These	 algo‐
       rithms  are  provided  by  the  cryptographic framework. Each supported
       algorithm is an alias to the most commonly 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 decryption	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.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      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			  8 Nov 2005				mac(1)
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