--quiet is set. Suggested by Duncan Harris. Also don't fail with BUG()
when processing a --symmetric message with a cipher we don't have.
* pkclist.c (build_pk_list): Revert last change. There are too many side
effects for stable.
* g10.c (main): Add read-only warning.
* compress.c (compress_filter): Make static to help force the use of
push_compress_filter. Remove default algorithm setting since that is done
in push_compress_filter now.
* main.h: Use named algorithm.
* filter.h, compress.c (push_compress_filter, push_compress_filter2): New.
Figure out which is the appropriate compression filter to use, and push it
into place.
* compress.c (handle_compressed), encode.c (encode_simple, encode_crypt),
sign.c (sign_file, sign_symencrypt_file), import.c (read_block), export.c
(do_export): Use push_compress_filter instead of pushing the compression
filter ourselves.
* compress-bz2.c: New. Bzlib versions of the compression filter routines.
* Makefile.am: Include compress-bz2.c if bz2lib is available.
difference here between a bad passphrase and a cipher algorithm that we
don't have, so use a error message that makes that clear. Use the actual
list of ciphers when checking whether a cipher is invalid. Return error
if the decrypted cipher algorithm is invalid. (proc_symkey_enc): In a
mixed passphrase/pk message, if a valid dek already exists from decrypting
via pk, do not try to process the passphrase. (proc_symkey_enc): Indicate
when we're decrypting a session key as opposed to decrypting data. If a
passphrase is invalid, discard the dek so we'll keep trying.
* encode.c (encode_simple): Allow for 32 bytes (256 bits) of symmetrically
encrypted session key. Use --s2k-cipher-algo to choose cipher, rather
than --cipher-algo. This code is never actually called in stable, but
better to fix it here in case we branch in the future.
* parse-packet.c (parse_subkeyenc): Call it a "symmetrically encrypted
session key" since "session key decryption key" is just baffling. Neaten
--list-packets output.
* pubkey-enc.c (get_it): Always show cipher-not-in-prefs warning unless
--quiet is set.
--encrypt-files (plus --verify-files, --decrypt-files).
* encode.c (use_mdc), g10.c (main): Use RFC1991 and RFC2440 directly to
check for MDC usability. Do not set the force_mdc or disable_mdc flags
since there is no point any longer.
explain the roundrobin a bit better.
* sig-check.c (check_key_signature2), import.c (import_one,
import_revoke_cert, chk_self_sigs, delete_inv_parts, collapse_uids,
merge_blocks): Make much quieter during import of slightly munged, but
recoverable, keys. Use log_error for unrecoverable import failures.
* sign.c (mk_notation_and_policy): Making a v3 signature with notations or
policy urls is an error, not an info (i.e. increment the errorcount).
Don't print the notation or policy url to stdout since it can be mixed
into the output stream when piping and munge the stream.
