cn(1)							    BSD General Commands Manual 						     cn(1)

NAME

     cn, -- Command line interface to CommonNumerics routines.

SYNOPSIS

     cn, [-p prompt] [command] [command_options] [command_args]

DESCRIPTION

     A simple command line utility allowing you to perform CRC and Base Encode/Decode with the Common Numerics functions.

     cn, has the following standard options for all sub-commands:

     -h 	   Show help information.

     -a 	   Use the specified algorithm.  The CRC, Encode, and Decode commands have various algorithms that can be used on data provided to
		   them.

     -s -<string>  Performs the operation on the specified string value.

     -v 	   Function in Verbose mode.

CN COMMAND SUMMARY

     cn, currently only provides functions for two activities: CRC calculation and Base Encoding and Decoding (base16, base32, base64).

     Here are brief descriptions of all the cn, commands:

     crc	    Perform a CRC on the data provided either as a string or on stdin.

		    Algorithms
		    10 - kCN_CRC_8
		    11 - kCN_CRC_8_ICODE
		    12 - kCN_CRC_8_ITU
		    13 - kCN_CRC_8_ROHC
		    14 - kCN_CRC_8_WCDMA
		    20 - kCN_CRC_16
		    21 - kCN_CRC_16_CCITT_TRUE
		    22 - kCN_CRC_16_CCITT_FALSE
		    23 - kCN_CRC_16_USB
		    24 - kCN_CRC_16_XMODEM
		    25 - kCN_CRC_16_DECT_R
		    26 - kCN_CRC_16_DECT_X
		    27 - kCN_CRC_16_ICODE
		    28 - kCN_CRC_16_VERIFONE
		    29 - kCN_CRC_16_A
		    30 - kCN_CRC_16_B
		    31 - kCN_CRC_16_Fletcher
		    40 - kCN_CRC_32_Adler
		    41 - kCN_CRC_32
		    42 - kCN_CRC_32_CASTAGNOLI
		    43 - kCN_CRC_32_BZIP2
		    44 - kCN_CRC_32_MPEG_2
		    45 - kCN_CRC_32_POSIX
		    46 - kCN_CRC_32_XFER
		    60 - kCN_CRC_64_ECMA_182

     Encode|Decode  Encode or Decode data provided either as a string or on stdin using one of the algorithms specified below.

		    Algorithms
		    1 - kCNEncodingBase64
		    2 - kCNEncodingBase32
		    3 - kCNEncodingBase32Recovery
		    4 - kCNEncodingBase32HEX
		    5 - kCNEncodingBase16

ENVIRONMENT

     CN_READ_SIZE  The "read size" to use when processing incoming data.

     CN_WIDTH	   The number of columns in which to output data when performing a base encoding.  The default is 64 columns.

HISTORY

     cn, was introduced in Mac OS X version 10.9 and iOS version 7.0.

Darwin								   June 2, 2019 							    Darwin