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 "$0" in
  27     /srv/security-master.debian.org/*)
  28         configdir="/srv/security-master.debian.org/dak/config/debian-security"
  29         ;;
  30     /srv/ftp-master.debian.org/*)
  31         configdir="/srv/ftp-master.debian.org/dak/config/debian"
  32         ;;
  33     *)
  34         error "$0: Can't tell if security or not"
  35         ;;
  36 esac
  37 . "$configdir/vars"
  38
  39 # Read and trivially validate our configuration
  40 . "$configdir/byhand-code-sign.conf"
  41 for var in EFI_BINARY_PRIVKEY EFI_BINARY_CERT \
  42            LINUX_SIGNFILE LINUX_MODULE_PRIVKEY LINUX_MODULE_CERT; do
  43         test -v $var || error "$var is not defined in configuration"
  44         test -n "${!var}" || error "$var is empty in configuration"
  45 done
  46
  47 TARGET="$ftpdir/dists/$SUITE/main/code-sign/"
  48 OUT_TARBALL="$TARGET/${IN_TARBALL##*/}"
  49 OUT_TARBALL="${OUT_TARBALL%.tar.xz}_sigs.tar.xz"
  50
  51 # Check that this source/arch/version hasn't already been signed
  52 if [ -e "$OUT_TARBALL" ]; then
  53         error "Signature tarball already exists: $OUT_TARBALL"
  54 fi
  55
  56 # If we fail somewhere, cleanup the temporary directories
  57 IN_DIR=
  58 OUT_DIR=
  59 CERT_DIR=
  60 cleanup() {
  61         for dir in "$IN_DIR" "$OUT_DIR" "$CERT_DIR"; do
  62                 test -z "$dir" || rm -rf "$dir"
  63         done
  64 }
  65 trap cleanup EXIT
  66
  67 # Extract the data into the input directory
  68 IN_DIR="$(mktemp -td byhand-code-sign-in.XXXXXX)"
  69 tar xaf "$IN_TARBALL" --directory="$IN_DIR"
  70
  71 case "$EFI_BINARY_PRIVKEY" in
  72     pkcs11:*)
  73         # Translate from OpenSSL PKCS#11 enigne syntax to pesign parameters
  74         # See: https://sources.debian.net/src/engine-pkcs11/0.2.2-1/src/engine_pkcs11.c
  75         pkcs11_pin_value=
  76         old_IFS="$IFS"
  77         IFS=';'
  78         for kv in ${EFI_BINARY_PRIVKEY#pkcs11:}; do
  79                 case "$kv" in
  80                     token=*)
  81                         pkcs11_token="${kv#*=}"
  82                         ;;
  83                     object=*)
  84                         pkcs11_object="${kv#*=}"
  85                         ;;
  86                     pin-value=*)
  87                         pkcs11_pin_value="${kv#*=}"
  88                         ;;
  89                 esac
  90         done
  91         IFS="$old_IFS"
  92         unset old_IFS
  93         # TODO: unlock it
  94         PESIGN_PARAMS=(-t "$pkcs11_token" -c "$pkcs11_object")
  95         ;;
  96     *)
  97         # Create certificate store for pesign
  98         CERT_DIR="$(mktemp -td byhand-code-sign-cert.XXXXXX)"
  99         chmod 700 "$CERT_DIR"
 100         mkdir "$CERT_DIR/store"
 101         certutil -N --empty-password -d "$CERT_DIR/store"
 102         openssl pkcs12 -export \
 103                 -inkey "$EFI_BINARY_PRIVKEY" -in "$EFI_BINARY_CERT" \
 104                 -out "$CERT_DIR/efi-image.p12" -passout pass: \
 105                 -name efi-image
 106         pk12util -i "$CERT_DIR/efi-image.p12" -d "$CERT_DIR/store" -K '' -W ''
 107         PESIGN_PARAMS=(-n "$CERT_DIR/store" -c efi-image)
 108         ;;
 109 esac
 110
 111 # Create hierarchy of detached signatures in parallel to the uploaded files
 112 OUT_DIR="$(mktemp -td byhand-code-sign-out.XXXXXX)"
 113 while read filename; do
 114         mkdir -p "$OUT_DIR/${filename%/*}"
 115         case "${filename##*/}" in
 116             *.efi | vmlinuz-*)
 117                 pesign -i "$IN_DIR/$filename" \
 118                        --export-signature "$OUT_DIR/$filename.sig" --sign \
 119                        -d sha256 "${PESIGN_PARAMS[@]}"
 120                 ;;
 121             *.ko)
 122                 "$LINUX_SIGNFILE" -d sha256 "$LINUX_MODULE_PRIVKEY" \
 123                         "$LINUX_MODULE_CERT" "$IN_DIR/$filename"
 124                 mv "$IN_DIR/$filename.p7s" "$OUT_DIR/$filename.sig"
 125                 ;;
 126             *)
 127                 echo >&2 "W: Not signing unrecognised file: $filename"
 128                 continue
 129                 ;;
 130         esac
 131         if [ ${#filename} -gt 60 ]; then
 132                 filename_trunc="...${filename:$((${#filename} - 57)):57}"
 133         else
 134                 filename_trunc="$filename"
 135         fi
 136         printf 'I: Signed %-60s\r' "$filename_trunc"
 137 done < <(find "$IN_DIR" -type f -printf '%P\n')
 138
 139 # Clear last progress message
 140 printf '%-70s\r' ''
 141
 142 # Build tarball of signatures
 143 chmod -R a+rX "$OUT_DIR"
 144 mkdir -p "$TARGET"
 145 tar caf "$OUT_TARBALL" --directory="$OUT_DIR" .
 146 echo "I: Created $OUT_TARBALL"
 147
 148 trap - EXIT
 149 cleanup
 150
 151 exit 0