Bug 40414: Add linux-signer-signmars

This is a copy from tor-browser-bundle/gitian/signmars.sh that we
currently use for mar signing.

tools/signing/linux-signer-signmars

+#!/bin/bash
+#
+#
+# You may set NSS_DB_DIR and/or NSS_CERTNAME before invoking this script.
+
+set -e
+set -u
+
+WRAPPER_DIR=$(dirname "$0")
+WRAPPER_DIR=$(readlink -e "$WRAPPER_DIR")
+
+if [ -z "${NSS_DB_DIR+x}" ]; then
+  NSS_DB_DIR=$WRAPPER_DIR/nssdb
+fi
+
+if [ -z "${NSS_CERTNAME+x}" ]; then
+  NSS_CERTNAME=marsigner
+fi
+
+# Incorporate definitions from the versions file.
+if [ -z "$1" ]; then
+  VERSIONS_FILE=$WRAPPER_DIR/versions
+else
+  VERSIONS_FILE=$1
+fi
+
+if ! [ -e $VERSIONS_FILE ]; then
+  echo >&2 "Error: $VERSIONS_FILE file does not exist"
+  exit 1
+fi
+
+. $VERSIONS_FILE
+#eval $(./get-tb-version $TORBROWSER_VERSION_TYPE)
+
+export LC_ALL=C
+
+# Check some prerequisites.
+if [ ! -r "$NSS_DB_DIR/cert9.db" ]; then
+  >&2 echo "Please create and populate the $NSS_DB_DIR directory"
+  exit 2
+fi
+
+OSNAME=""
+ARCH="$(uname -s)-$(uname -m)"
+case $ARCH in
+  Linux-x86_64)
+    OSNAME="linux64"
+    ;;
+  Linux-i*86)
+    OSNAME="linux32"
+    ;;
+  *)
+    >&2 echo "Unsupported architecture $ARCH"
+    exit 2
+esac
+
+# Extract the MAR tools so we can use the signmar program.
+MARTOOLS_TMP_DIR=$(mktemp -d)
+trap "rm -rf $MARTOOLS_TMP_DIR" EXIT
+MARTOOLS_ZIP="$WRAPPER_DIR/../../gitian-builder/inputs/mar-tools-new-${OSNAME}.zip"
+cd $MARTOOLS_TMP_DIR
+unzip -q "$MARTOOLS_ZIP"
+cd $WRAPPER_DIR
+export PATH="$MARTOOLS_TMP_DIR/mar-tools:$PATH"
+if [ -z "${LD_LIBRARY_PATH+x}" ]; then
+  export LD_LIBRARY_PATH="$MARTOOLS_TMP_DIR/mar-tools"
+else
+  export LD_LIBRARY_PATH="$MARTOOLS_TMP_DIR/mar-tools:$LD_LIBRARY_PATH"
+fi
+
+# Prompt for the NSS password.
+# TODO: Test that the entered NSS password is correct.  But how?  Unfortunately,
+# both certutil and signmar keep trying to read a new password when they are
+# given an incorrect one.
+read -s -p "NSS password:" NSSPASS
+echo ""
+
+# Sign each MAR file.
+#
+# Our strategy is to first move all .mar files out of the TORBROWSER_VERSION
+# directory into a TORBROWSER_VERSION-unsigned/ directory.  Details:
+#   If a file has not been signed, we move it to the -unsigned/ directory.
+#   If a file has already been signed and a file with the same name exists in
+#     the -unsigned/ directory, we just delete the signed file.
+#   If a file has already been signed but no corresponding file exists in
+#     the -unsigned/ directory, we report an error and exit.
+#
+# Once the above is done,  the -unsigned/ directory contains a set of .mar
+# files that need to be signed, so we go ahead and sign them one-by-one.
+SIGNED_DIR="$WRAPPER_DIR/$TORBROWSER_VERSION"
+UNSIGNED_DIR="$WRAPPER_DIR/${TORBROWSER_VERSION}-unsigned"
+mkdir -p "$UNSIGNED_DIR"
+cd "$SIGNED_DIR"
+for marfile in *.mar; do
+  if [ ! -f "$marfile" ]; then
+    continue;
+  fi
+
+  # First, we check for an existing signature.  The signmar -T output will
+  # include a line like "Signature block found with N signatures".
+  SIGINFO_PREFIX="Signature block found with "
+  SIGINFO=$(signmar -T "$marfile" | grep "^${SIGINFO_PREFIX}")
+  SIGCOUNT=0
+  if [ ! -z "$SIGINFO" ]; then
+    SIGCOUNT=$(echo $SIGINFO | sed -e "s/${SIGINFO_PREFIX}//" -e 's/\([0-9]*\).*$/\1/')
+  fi
+  if [ $SIGCOUNT -eq 0 ]; then
+    # No signature; move this .mar file to the -unsigned/ directory.
+    mv "$marfile" "$UNSIGNED_DIR/"
+  else
+    echo "Skipping $marfile (already signed)"
+  fi
+done
+
+# Use signmar to sign each .mar file that is now in the -unsigned directory.
+TMPMAR="$SIGNED_DIR/tmp.mar"
+trap "rm -f $TMPMAR" EXIT
+cd "$UNSIGNED_DIR"
+echo "Starting the signing..."
+COUNT=0
+for marfile in *.mar; do
+  if [ ! -f "$marfile" ]; then
+    continue;
+  fi
+  echo "$NSSPASS" | signmar -d "$NSS_DB_DIR" -n "$NSS_CERTNAME" -s \
+      "$marfile" "$TMPMAR"
+  mv "$TMPMAR" "$SIGNED_DIR/$marfile"
+  COUNT=$((COUNT + 1))
+  echo "Signed MAR file $COUNT"
+  rm "$marfile"
+done
+
+echo "The $COUNT MAR files located in $SIGNED_DIR/ have been signed."