scripts/debian/byhand-code-sign

   1 #!/bin/bash
   2
   3 set -u
   4 set -e
   5 set -o pipefail
   6
   7 if [ $# -lt 5 ]; then
   8         echo "Usage: $0 filename version arch changes_file suite"
   9         exit 1
  10 fi
  11
  12 IN_TARBALL="$1" # Tarball to read, compressed with xz
  13 VERSION="$2"
  14 ARCH="$3"
  15 CHANGES="$4"    # Changes file for the upload
  16 SUITE="$5"
  17
  18 error() {
  19         echo >&2 "E: $*"
  20         exit 1
  21 }
  22
  23 export OPENSSL_CONF=/dev/null
  24
  25 # Read dak configuration for security or main archive
  26 case "$SUITE" in
  27     *-security)
  28         configdir="/srv/security-master.debian.org/dak/config/debian-security"
  29         ;;
  30     *)
  31         configdir="/srv/ftp-master.debian.org/dak/config/debian"
  32         ;;
  33 esac
  34 . "$configdir/vars"
  35
  36 # Read and trivially validate our configuration
  37 . "$configdir/byhand-code-sign.conf"
  38 for var in EFI_BINARY_PRIVKEY EFI_BINARY_CERT \
  39            LINUX_SIGNFILE LINUX_MODULE_PRIVKEY LINUX_MODULE_CERT; do
  40         test -v $var || error "$var is not defined in configuration"
  41         test -n "${!var}" || error "$var is empty in configuration"
  42 done
  43
  44 TARGET="$ftpdir/dists/$SUITE/main/code-sign/"
  45 OUT_TARBALL="$TARGET/${IN_TARBALL##*/}"
  46 OUT_TARBALL="${OUT_TARBALL%.tar.xz}_sigs.tar.xz"
  47
  48 # Check that this source/arch/version hasn't already been signed
  49 if [ -e "$OUT_TARBALL" ]; then
  50         error "Signature tarball already exists: $OUT_TARBALL"
  51 fi
  52
  53 # If we fail somewhere, cleanup the temporary directories
  54 IN_DIR=
  55 OUT_DIR=
  56 CERT_DIR=
  57 cleanup() {
  58         for dir in "$IN_DIR" "$OUT_DIR" "$CERT_DIR"; do
  59                 test -z "$dir" || rm -rf "$dir"
  60         done
  61 }
  62 trap cleanup EXIT
  63
  64 # Extract the data into the input directory
  65 IN_DIR="$(mktemp -td byhand-code-sign-in.XXXXXX)"
  66 tar xaf "$IN_TARBALL" --directory="$IN_DIR"
  67
  68 case "$EFI_BINARY_PRIVKEY" in
  69     pkcs11:*)
  70         # Translate from OpenSSL PKCS#11 enigne syntax to pesign parameters
  71         # See: https://sources.debian.net/src/engine-pkcs11/0.2.2-1/src/engine_pkcs11.c
  72         pkcs11_pin_value=
  73         old_IFS="$IFS"
  74         IFS=';'
  75         for kv in ${EFI_BINARY_PRIVKEY#pkcs11:}; do
  76                 case "$kv" in
  77                     token=*)
  78                         pkcs11_token="${kv#*=}"
  79                         ;;
  80                     object=*)
  81                         pkcs11_object="${kv#*=}"
  82                         ;;
  83                     pin-value=*)
  84                         pkcs11_pin_value="${kv#*=}"
  85                         ;;
  86                 esac
  87         done
  88         IFS="$old_IFS"
  89         unset old_IFS
  90         # TODO: unlock it
  91         PESIGN_PARAMS=(-t "$pkcs11_token" -c "$pkcs11_object")
  92         ;;
  93     *)
  94         # Create certificate store for pesign
  95         CERT_DIR="$(mktemp -td byhand-code-sign-cert.XXXXXX)"
  96         chmod 700 "$CERT_DIR"
  97         mkdir "$CERT_DIR/store"
  98         certutil -N --empty-password -d "$CERT_DIR/store"
  99         openssl pkcs12 -export \
 100                 -inkey "$EFI_BINARY_PRIVKEY" -in "$EFI_BINARY_CERT" \
 101                 -out "$CERT_DIR/efi-image.p12" -passout pass: \
 102                 -name efi-image
 103         pk12util -i "$CERT_DIR/efi-image.p12" -d "$CERT_DIR/store" -K '' -W ''
 104         PESIGN_PARAMS=(-n "$CERT_DIR/store" -c efi-image)
 105         ;;
 106 esac
 107
 108 # Create hierarchy of detached signatures in parallel to the uploaded files
 109 OUT_DIR="$(mktemp -td byhand-code-sign-out.XXXXXX)"
 110 while read filename; do
 111         mkdir -p "$OUT_DIR/${filename%/*}"
 112         case "${filename##*/}" in
 113             *.efi | vmlinuz-*)
 114                 pesign -i "$IN_DIR/$filename" \
 115                        --export-signature "$OUT_DIR/$filename.sig" --sign \
 116                        -d sha256 "${PESIGN_PARAMS[@]}"
 117                 ;;
 118             *.ko)
 119                 "$LINUX_SIGNFILE" -d sha256 "$LINUX_MODULE_PRIVKEY" \
 120                         "$LINUX_MODULE_CERT" "$IN_DIR/$filename"
 121                 mv "$IN_DIR/$filename.p7s" "$OUT_DIR/$filename.sig"
 122                 ;;
 123             *)
 124                 echo >&2 "W: Not signing unrecognised file: $filename"
 125                 continue
 126                 ;;
 127         esac
 128         if [ ${#filename} -gt 60 ]; then
 129                 filename_trunc="...${filename:$((${#filename} - 57)):57}"
 130         else
 131                 filename_trunc="$filename"
 132         fi
 133         printf 'I: Signed %-60s\r' "$filename_trunc"
 134 done < <(find "$IN_DIR" -type f -printf '%P\n')
 135
 136 # Clear last progress message
 137 printf '%-70s\r' ''
 138
 139 # Build tarball of signatures
 140 chmod -R a+rX "$OUT_DIR"
 141 mkdir -p "$TARGET"
 142 tar caf "$OUT_TARBALL" --directory="$OUT_DIR" .
 143 echo "I: Created $OUT_TARBALL"
 144
 145 trap - EXIT
 146 cleanup
 147
 148 exit 0