diff options
Diffstat (limited to 'cmdline/apt-key.in')
| -rw-r--r-- | cmdline/apt-key.in | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/cmdline/apt-key.in b/cmdline/apt-key.in index 723af06ff..5bc5462d2 100644 --- a/cmdline/apt-key.in +++ b/cmdline/apt-key.in @@ -249,6 +249,34 @@ accessible_file_exists() { return 1 } +is_supported_keyring() { + # empty files are always supported + if ! test -s "$1"; then + return 0 + fi + local FILEEXT="${1##*.}" + if [ "$FILEEXT" = 'gpg' ]; then + # 0x98, 0x99 and 0xC6 via octal as hex isn't supported by dashs printf + if printf '\231' | cmp --silent --bytes=1 - "$1"; then + true + elif printf '\230' | cmp --silent --bytes=1 - "$1"; then + true + elif printf '\306' | cmp --silent --bytes=1 - "$1"; then + true + else + apt_warn "The key(s) in the keyring $1 are ignored as the file has an unsupported filetype." + return 1 + fi + elif [ "$FILEEXT" = 'asc' ]; then + true #dearmor_filename will deal with them + else + # most callers ignore unsupported extensions silently + apt_warn "The key(s) in the keyring $1 are ignored as the file has an unsupported filename extension." + return 1 + fi + return 0 +} + foreach_keyring_do() { local ACTION="$1" shift @@ -257,7 +285,7 @@ foreach_keyring_do() { $ACTION "$TRUSTEDFILE" "$@" else # otherwise all known keyrings are up for inspection - if accessible_file_exists "$TRUSTEDFILE"; then + if accessible_file_exists "$TRUSTEDFILE" && is_supported_keyring "$TRUSTEDFILE"; then $ACTION "$TRUSTEDFILE" "$@" fi local TRUSTEDPARTS="/etc/apt/trusted.gpg.d" @@ -266,7 +294,7 @@ foreach_keyring_do() { TRUSTEDPARTS="$(readlink -f "$TRUSTEDPARTS")" local TRUSTEDPARTSLIST="$(cd /; find "$TRUSTEDPARTS" -mindepth 1 -maxdepth 1 \( -name '*.gpg' -o -name '*.asc' \))" for trusted in $(echo "$TRUSTEDPARTSLIST" | sort); do - if accessible_file_exists "$trusted"; then + if accessible_file_exists "$trusted" && is_supported_keyring "$trusted"; then $ACTION "$trusted" "$@" fi done |