Avoid re-expansion in ${sort } CVE-2019-13917 OVE-20190718-0006

[exim.git] / release-process / scripts / sign_exim_packages

diff --git a/release-process/scripts/sign_exim_packages b/release-process/scripts/sign_exim_packages
index bd02d1183d9a15c465b6e8218730204070dbcf32..e768409968faa4e113c7db2462a56b9ddd8a7294 100755 (executable)
--- a/release-process/scripts/sign_exim_packages
+++ b/release-process/scripts/sign_exim_packages
@@ -12,28 +12,52 @@
 # woe betide the poor sod who does not use a gpg agent, so has
 # to enter their password for every file...
 
 # woe betide the poor sod who does not use a gpg agent, so has
 # to enter their password for every file...
 

+prog="$(basename "$0")"
+warn() { printf >&2 "%s: %s\n" "$prog" "$*" ; }
+
+: "${GPG_COMMAND:=gpg}"
+umask 022
+
+# We've always expected an explicit key for signing, instead of just using the
+# gnupg config.  It make sense to honor the git config value.  It makes sense
+# to honor env.  But git doesn't allow specifying multiple subkeys, it only
+# passes one -u option.
+# UID specs explicitly allow whitespace in several formats.
+# We have one scalar value, we're sh, we're not going to try using an array.
+#
+# So if you want to sign with multiple subkeys, then set it up with multiple
+# local-user directives in ~/.gnupg/gpg.conf & set EXIM_KEY=default in environ.
+

 if repo_signing_key="$(git config user.signingkey)"; then
        : "${EXIM_KEY:=$repo_signing_key}"
 else
 if repo_signing_key="$(git config user.signingkey)"; then
        : "${EXIM_KEY:=$repo_signing_key}"
 else

-       : "${EXIM_KEY:?Need a PGP key uid to sign with}"
+       if [ ".${EXIM_KEY:-}" = "." ]; then
+               warn "no EXIM_KEY found, trusting local gpg config"
+       fi

 fi
 
 fi
 

-: "${GPG_COMMAND:=gpg}"
-umask 022
+case "${EXIM_KEY:-default}" in
+default|DEFAULT)
+       gpg_sign() { ${GPG_COMMAND} --detach-sig --armor "${1:?}" ; }
+       ;;
+*)
+       gpg_sign() { ${GPG_COMMAND} --local-user "${EXIM_KEY}" --detach-sig --armor "${1:?}" ; }
+       ;;
+esac

 
 cd_to() { echo "Working in: $1"; cd "$1"; }
 
 
 cd_to() { echo "Working in: $1"; cd "$1"; }
 

-okay=false
-if [ -d ../../release-process ] && [ "${PWD##*/}" = "pkgs" ]; then
-       okay=true # we are in right dir
-elif [ -d release-process ]; then
-       b="$(find . -maxdepth 1 -name 'exim-packaging-*' | sort | tail -n 1)"
-       if [ ".$b" != "." ]; then
-               cd_to "$b/pkgs"
-               okay=true
-       fi
-fi
-if ! $okay; then
+#okay=false
+#if [ -d ../../release-process ] && [ "${PWD##*/}" = "pkgs" ]; then
+#      okay=true # we are in right dir
+#elif [ -d release-process ]; then
+#      b="$(find . -maxdepth 1 -name 'exim-packaging-*' | sort | tail -n 1)"
+#      if [ ".$b" != "." ]; then
+#              cd_to "$b/pkgs"
+#              okay=true
+#      fi
+#fi
+#if ! $okay; then

        if [ -d "${1:?need a directory to look in}" ]; then
                cd_to "$1"
                shift
        if [ -d "${1:?need a directory to look in}" ]; then
                cd_to "$1"
                shift


@@ -41,13 +65,12 @@ if ! $okay; then
                printf "%s: %s\n" >&2 "$(basename "$0")" "where should I be looking"
                exit 1
        fi
                printf "%s: %s\n" >&2 "$(basename "$0")" "where should I be looking"
                exit 1
        fi

-fi
+#fi

 
 # Assumes no whitespace (strictly, $IFS) in filenames, which we're okay with
 set $(find . -name '*.asc' -prune -o -type f -print | cut -c 3- | sort)
 
 # Assumes no whitespace (strictly, $IFS) in filenames, which we're okay with
 set $(find . -name '*.asc' -prune -o -type f -print | cut -c 3- | sort)

-

 for FILE
 do
        echo "Signing: $FILE"
 for FILE
 do
        echo "Signing: $FILE"

-       ${GPG_COMMAND} --local-user "${EXIM_KEY}" --detach-sig --armor "$FILE"
+       gpg_sign "$FILE"

 done
 done