You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
119 lines
3.2 KiB
119 lines
3.2 KiB
#!/bin/bash |
|
|
|
### This script attempts to download the signature file SHA256SUMS.asc from bitcoin.org |
|
### It first checks if the signature passes, and then downloads the files specified in |
|
### the file, and checks if the hashes of these files match those that are specified |
|
### in the signature file. |
|
### The script returns 0 if everything passes the checks. It returns 1 if either the |
|
### signature check or the hash check doesn't pass. If an error occurs the return value is 2 |
|
|
|
function clean_up { |
|
for file in $* |
|
do |
|
rm "$file" 2> /dev/null |
|
done |
|
} |
|
|
|
WORKINGDIR="/tmp/bitcoin" |
|
TMPFILE="hashes.tmp" |
|
|
|
SIGNATUREFILENAME="SHA256SUMS.asc" |
|
RCSUBDIR="test/" |
|
BASEDIR="https://bitcoin.org/bin/" |
|
VERSIONPREFIX="bitcoin-core-" |
|
RCVERSIONSTRING="rc" |
|
|
|
if [ ! -d "$WORKINGDIR" ]; then |
|
mkdir "$WORKINGDIR" |
|
fi |
|
|
|
cd "$WORKINGDIR" |
|
|
|
#test if a version number has been passed as an argument |
|
if [ -n "$1" ]; then |
|
#let's also check if the version number includes the prefix 'bitcoin-', |
|
# and add this prefix if it doesn't |
|
if [[ $1 == "$VERSIONPREFIX"* ]]; then |
|
VERSION="$1" |
|
else |
|
VERSION="$VERSIONPREFIX$1" |
|
fi |
|
|
|
#now let's see if the version string contains "rc", and strip it off if it does |
|
# and simultaneously add RCSUBDIR to BASEDIR, where we will look for SIGNATUREFILENAME |
|
if [[ $VERSION == *"$RCVERSIONSTRING"* ]]; then |
|
BASEDIR="$BASEDIR${VERSION/%-$RCVERSIONSTRING*}/" |
|
BASEDIR="$BASEDIR$RCSUBDIR" |
|
else |
|
BASEDIR="$BASEDIR$VERSION/" |
|
fi |
|
|
|
SIGNATUREFILE="$BASEDIR$SIGNATUREFILENAME" |
|
else |
|
echo "Error: need to specify a version on the command line" |
|
exit 2 |
|
fi |
|
|
|
#first we fetch the file containing the signature |
|
WGETOUT=$(wget -N "$BASEDIR$SIGNATUREFILENAME" 2>&1) |
|
|
|
#and then see if wget completed successfully |
|
if [ $? -ne 0 ]; then |
|
echo "Error: couldn't fetch signature file. Have you specified the version number in the following format?" |
|
echo "[$VERSIONPREFIX]<version>-[$RCVERSIONSTRING[0-9]] (example: "$VERSIONPREFIX"0.10.4-"$RCVERSIONSTRING"1)" |
|
echo "wget output:" |
|
echo "$WGETOUT"|sed 's/^/\t/g' |
|
exit 2 |
|
fi |
|
|
|
#then we check it |
|
GPGOUT=$(gpg --yes --decrypt --output "$TMPFILE" "$SIGNATUREFILENAME" 2>&1) |
|
|
|
#return value 0: good signature |
|
#return value 1: bad signature |
|
#return value 2: gpg error |
|
|
|
RET="$?" |
|
if [ $RET -ne 0 ]; then |
|
if [ $RET -eq 1 ]; then |
|
#and notify the user if it's bad |
|
echo "Bad signature." |
|
elif [ $RET -eq 2 ]; then |
|
#or if a gpg error has occurred |
|
echo "gpg error. Do you have the Bitcoin Core binary release signing key installed?" |
|
fi |
|
|
|
echo "gpg output:" |
|
echo "$GPGOUT"|sed 's/^/\t/g' |
|
clean_up $SIGNATUREFILENAME $TMPFILE |
|
exit "$RET" |
|
fi |
|
|
|
#here we extract the filenames from the signature file |
|
FILES=$(awk '{print $2}' "$TMPFILE") |
|
|
|
#and download these one by one |
|
for file in in $FILES |
|
do |
|
wget --quiet -N "$BASEDIR$file" |
|
done |
|
|
|
#check hashes |
|
DIFF=$(diff <(sha256sum $FILES) "$TMPFILE") |
|
|
|
if [ $? -eq 1 ]; then |
|
echo "Hashes don't match." |
|
echo "Offending files:" |
|
echo "$DIFF"|grep "^<"|awk '{print "\t"$3}' |
|
exit 1 |
|
elif [ $? -gt 1 ]; then |
|
echo "Error executing 'diff'" |
|
exit 2 |
|
fi |
|
|
|
#everything matches! clean up the mess |
|
clean_up $FILES $SIGNATUREFILENAME $TMPFILE |
|
|
|
echo -e "Verified hashes of \n$FILES" |
|
|
|
exit 0
|
|
|