/usr/bin/mh/mhpgp is in mmh 0.3-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | #!/bin/sh
# Based on mhpgp 1.1.0.7 2005/11/29 06:25:05 by Neil Rickert
# Adjusted to mmh by markus schnalke <meillo@marmaro.de>, 2012-07
# mhpgp:
# -write: Save the decrypted message to the current folder
usage="Usage: mhpgp [-write] [-Version] [-help] [+folder] [msg]"
# prepend the default options from the profile
set -- `mhparam -nocomp ${0##*/}` "$@"
while : ; do
case "$1" in
-w*)
wflag=1
;;
-V*)
echo "${0##*/} has no own version number, thus this instead:"
folder -Version
exit 0
;;
-h*|-*)
echo "$usage" >&2
exit 1
;;
*)
break
;;
esac
shift
done
TEMP=/tmp/${0##*/}.$$
umask 077
mkdir $TEMP || exit 1
trap "rm -rf $TEMP" 0 1 2 15
### verify a mime message
mimeverify() {
bdry=`echo "$CH" | sed -n \
-e 's/[Bb][Oo][Uu][Nn][Dd][Aa][Rr][Yy]=/;boundary=/' \
-e 's/.*;boundary=/boundary=/' \
-e 's/^boundary=\([^;]*\);.*/boundary=\1/' \
-e 's/^boundary="\([^"]*\)".*/boundary=\1/' \
-e 's/[
][
]*$//' \
-e 's/^boundary=//p'`
xbdry=`echo "$bdry" | sed -e 's"/"\\\\/"g' -e 's"\."\\\\."g'`
sed -e '1,/^--'"$xbdry"'[
]*$/d' $FILE > $TEMP/body
sed -e '/^--'"$xbdry"'[
]*$/,$d' \
-e 's/[
][
]*$//' $TEMP/body |
sed -e '$d' -e 's/$/
/' > $TEMP/msg
if grep "[ ^M ]$" $TEMP/body >/dev/null 2>&1 ; then
echo 'Warning: trailing blanks removed from message body' >&2
fi
sed -e '1,/^--'"$xbdry"'[
]*$/d' $TEMP/body |
sed -n -e '/BEGIN PGP /,/END PGP /p' > $TEMP/msg.asc
gpg --verify $TEMP/msg.asc
}
### decrypt MIME and non-MIME messages (type is in $1)
###; invoke the pager as needed
decrypt() {
sed -n -e '
/^-----BEGIN PGP MESSAGE/b x
d
:x
p
/^-----END PGP MESSAGE/b y
n
b x
:y
n
b y' $FILE | gpg --decrypt >$TEMP/msg
X=`tail -1c $TEMP/msg`
if [ "$X" != "" ] ; then
# ensure trailing newline
echo >> $TEMP/msg
fi
if [ "$1" = "plain" ] ; then
sedcmd="/^[Mm][Ii][Mm][Ee]-.*:/b r"
else
sedcmd='/^-*$/q'
fi
sed -n ':a
/^-*$/q
'"$sedcmd"'
/^[Cc][Oo][Nn][Tt][Ee][Nn][Tt]-/b r
p
n
b a
:r
n
/^[ ]/b r
b a' "$FILE" > "$TEMP/outfile"
if [ "$1" = "plain" ] ; then echo "" >> "$TEMP/outfile" ; fi
sed -e 's/
$//' $TEMP/msg >> "$TEMP/outfile" || exit 1
if [ "$wflag" = "1" ] ; then
refile -file "$TEMP/outfile" @
else
show -file "$TEMP/outfile"
fi
}
### Mainline processing
case "$#" in
0)
FILE=`mhpath c` || exit 1 ;;
*)
case "$*" in
/*) FILE=`echo "$@"` ;;
*) FILE=`mhpath "$@"` || exit 1 ;;
esac ;;
esac
set X $FILE
if [ $# != 2 ] ; then
echo "One message at a time, please!" >&2
exit 1
fi
# get mime-version and content-type headers.
CH=`sed -n -e '\
:a
/^-*$/q
/^[Mm][Ii][Mm][Ee]-[Vv][Ee][Rr][Ss][Ii][Oo][Nn]:/b x
/^[Cc][Oo][Nn][Tt][Ee][Nn][Tt]-[Tt][Yy][Pp][Ee]:/b x
d
:x
p
n
/^[ ]/b x
b a' $FILE`
if echo "$CH" | grep -i mime-version >/dev/null 2>&1; then
: ## nothing, this is good
else
CH=
fi
# Handle MIME variants
case "$CH" in
*application/pgp-signature*)
mimeverify
exit
;;
*application/pgp-encrypted*)
decrypt mime
exit
;;
esac
# Handle plain variants
case "`grep '^-----BEGIN PGP' $FILE 2>/dev/null`" in
*"PGP SIGNED MESSAGE"*)
gpg --verify "$FILE"
exit
;;
*"BEGIN PGP MESSAGE"*)
decrypt plain
exit
;;
esac
echo "I can't find a PGP message there" >&2
exit 1
|