69 lines
2.6 KiB
Bash
69 lines
2.6 KiB
Bash
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#!/bin/sh
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#################################################################
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# #
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# Copyright 2010 Fidelity Information Services, Inc #
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# #
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# This source code contains the intellectual property #
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# of its copyright holder(s), and is made available #
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# under a license. If you do not know the terms of #
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# the license, please stop and do not read further. #
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# #
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#################################################################
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################################################################################################
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#
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# gen_sym_hash.sh - generates SHA512 hash output of the given key + Encryption parameters
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# $1 - encrypted symmetric key
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#
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################################################################################################
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# echo and options
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# Linux honors escape sequence only when run with -e
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# gtmcrypt_ref.h and gen_sym_hash.sh NEED to use the same value for
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# the encryption parameter string(defined below).
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# This is currently determined by the OS type. If this changes,
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# please verify that UNIQ_ENC_PARAM_STRING in gtmcrypt_ref.h
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# and encr_param_string in this module match.
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hostos=`uname -s`
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# try to get a predictable which
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if [ "OS/390" = "$hostos" ] ; then which=whence ;
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elif [ -x "/usr/bin/which" ] ; then which=/usr/bin/which
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else which=which
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fi
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# temporary file
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if [ -x "`$which mktemp 2>&1`" ] ; then tmp_file=`mktemp`
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else tmp_file=/tmp/`basename $0`_$$.tmp ; fi
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touch $tmp_file
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chmod go-rwx $tmp_file
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trap 'rm -rf $tmp_file ; stty sane ; exit 1' HUP INT QUIT TERM TRAP
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ECHO=/bin/echo
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ECHO_OPTIONS=""
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if [ "Linux" = $hostos ] ; then ECHO_OPTIONS="-e" ; encr_param_string="AES256CFB" ;
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elif [ "AIX" = "$hostos" ]; then encr_param_string="BLOWFISHCFB"
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else encr_param_string="AES256CFB"
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fi
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if [ $# -lt 1 ]; then
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$ECHO "Usage: `basename $0` encrypted symmetric key file" ; exit 1
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fi
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encrypted_key_file="$1"
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$ECHO $ECHO_OPTIONS $encr_param_string\\c >$tmp_file
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# Identify GnuPG - it is required
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if [ -x "`$which gpg 2>&1`" ] ; then gpg=gpg
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elif [ -x "`$which gpg2 2>&1`" ] ; then gpg=gpg2
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else $ECHO "Able to find neither gpg nor gpg2. Exiting" ; exit 1 ; fi
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# Get passphrase for GnuPG keyring
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$ECHO $ECHO_OPTIONS Passphrase for keyring: \\c ; stty -echo ; read passphrase ; stty echo ; $ECHO ""
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$ECHO $passphrase | $gpg --no-tty --batch --passphrase-fd 0 -d $encrypted_key_file | cat - $tmp_file | $gpg --print-md SHA512 | tr -d ' \n'
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$ECHO
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rm -f $tmp_file
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