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119 lines
3.3 KiB
119 lines
3.3 KiB
#!/bin/bash |
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### This script attempts to download the signature file SHA256SUMS.asc from SourceForge |
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### It first checks if the signature passes, and then downloads the files specified in |
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### the file, and checks if the hashes of these files match those that are specified |
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### in the signature file. |
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### The script returns 0 if everything passes the checks. It returns 1 if either the |
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### signature check or the hash check doesn't pass. If an error occurs the return value is 2 |
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function clean_up { |
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for file in $* |
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do |
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rm "$file" 2> /dev/null |
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done |
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} |
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WORKINGDIR="/tmp/bitcoin" |
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TMPFILE="hashes.tmp" |
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#this URL is used if a version number is not specified as an argument to the script |
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SIGNATUREFILE="http://downloads.sourceforge.net/project/bitcoin/Bitcoin/bitcoin-0.8.1/SHA256SUMS.asc" |
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SIGNATUREFILENAME="SHA256SUMS.asc" |
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RCSUBDIR="test/" |
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BASEDIR="http://downloads.sourceforge.net/project/bitcoin/Bitcoin/" |
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VERSIONPREFIX="bitcoin-" |
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RCVERSIONSTRING="rc" |
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if [ ! -d "$WORKINGDIR" ]; then |
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mkdir "$WORKINGDIR" |
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fi |
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cd "$WORKINGDIR" |
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#test if a version number has been passed as an argument |
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if [ -n "$1" ]; then |
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#let's also check if the version number includes the prefix 'bitcoin-', |
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# and add this prefix if it doesn't |
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if [[ $1 == "$VERSIONPREFIX"* ]]; then |
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VERSION="$1" |
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else |
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VERSION="$VERSIONPREFIX$1" |
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fi |
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#now let's see if the version string contains "rc", and strip it off if it does |
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# and simultaneously add RCSUBDIR to BASEDIR, where we will look for SIGNATUREFILENAME |
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if [[ $VERSION == *"$RCVERSIONSTRING"* ]]; then |
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BASEDIR="$BASEDIR${VERSION/%-$RCVERSIONSTRING*}/" |
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BASEDIR="$BASEDIR$RCSUBDIR" |
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else |
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BASEDIR="$BASEDIR$VERSION/" |
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fi |
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SIGNATUREFILE="$BASEDIR$SIGNATUREFILENAME" |
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else |
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BASEDIR="${SIGNATUREFILE%/*}/" |
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fi |
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#first we fetch the file containing the signature |
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WGETOUT=$(wget -N "$BASEDIR$SIGNATUREFILENAME" 2>&1) |
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#and then see if wget completed successfully |
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if [ $? -ne 0 ]; then |
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echo "Error: couldn't fetch signature file. Have you specified the version number in the following format?" |
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echo "[bitcoin-]<version>-[rc[0-9]] (example: bitcoin-0.7.1-rc1)" |
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echo "wget output:" |
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echo "$WGETOUT"|sed 's/^/\t/g' |
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exit 2 |
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fi |
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#then we check it |
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GPGOUT=$(gpg --yes --decrypt --output "$TMPFILE" "$SIGNATUREFILENAME" 2>&1) |
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#return value 0: good signature |
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#return value 1: bad signature |
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#return value 2: gpg error |
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RET="$?" |
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if [ $RET -ne 0 ]; then |
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if [ $RET -eq 1 ]; then |
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#and notify the user if it's bad |
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echo "Bad signature." |
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elif [ $RET -eq 2 ]; then |
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#or if a gpg error has occurred |
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echo "gpg error. Do you have Gavin's code signing key installed?" |
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fi |
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echo "gpg output:" |
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echo "$GPGOUT"|sed 's/^/\t/g' |
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clean_up $SIGNATUREFILENAME $TMPFILE |
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exit "$RET" |
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fi |
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#here we extract the filenames from the signature file |
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FILES=$(awk '{print $2}' "$TMPFILE") |
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#and download these one by one |
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for file in in $FILES |
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do |
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wget --quiet -N "$BASEDIR$file" |
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done |
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#check hashes |
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DIFF=$(diff <(sha256sum $FILES) "$TMPFILE") |
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if [ $? -eq 1 ]; then |
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echo "Hashes don't match." |
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echo "Offending files:" |
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echo "$DIFF"|grep "^<"|awk '{print "\t"$3}' |
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exit 1 |
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elif [ $? -gt 1 ]; then |
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echo "Error executing 'diff'" |
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exit 2 |
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fi |
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#everything matches! clean up the mess |
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clean_up $FILES $SIGNATUREFILENAME $TMPFILE |
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exit 0
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