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gentoo-overlay/app-crypt/gnupg/files/gnupg-2.4.2-fix-emacs.patch

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https://bugs.gentoo.org/907839
https://dev.gnupg.org/T6481
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=2f872fa68c6576724b9dabee9fb0844266f55d0d
From 2f872fa68c6576724b9dabee9fb0844266f55d0d Mon Sep 17 00:00:00 2001
From: NIIBE Yutaka <gniibe@fsij.org>
Date: Wed, 24 May 2023 10:36:04 +0900
Subject: [PATCH] gpg: Report BEGIN_* status before examining the input.
* common/miscellaneous.c (is_openpgp_compressed_packet)
(is_file_compressed): Moved to ...
* common/iobuf.c: ... in this file.
(is_file_compressed): Change the argument to INP, the iobuf.
* common/util.h (is_file_compressed): Remove.
* common/iobuf.h (is_file_compressed): Add.
* g10/cipher-aead.c (write_header): Don't call write_status_printf
here.
(cipher_filter_aead): Call write_status_printf when called with
IOBUFCTRL_INIT.
* g10/cipher-cfb.c (write_header): Don't call write_status_printf
here.
(cipher_filter_cfb): Call write_status_printf when called with
IOBUFCTRL_INIT.
* g10/encrypt.c (encrypt_simple): Use new is_file_compressed function,
after call of iobuf_push_filter.
(encrypt_crypt): Likewise.
* g10/sign.c (sign_file): Likewise.
--
GnuPG-bug-id: 6481
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
--- a/common/iobuf.c
+++ b/common/iobuf.c
@@ -3057,3 +3057,123 @@ iobuf_skip_rest (iobuf_t a, unsigned long n, int partial)
}
}
}
+
+
+/* Check whether (BUF,LEN) is valid header for an OpenPGP compressed
+ * packet. LEN should be at least 6. */
+static int
+is_openpgp_compressed_packet (const unsigned char *buf, size_t len)
+{
+ int c, ctb, pkttype;
+ int lenbytes;
+
+ ctb = *buf++; len--;
+ if (!(ctb & 0x80))
+ return 0; /* Invalid packet. */
+
+ if ((ctb & 0x40)) /* New style (OpenPGP) CTB. */
+ {
+ pkttype = (ctb & 0x3f);
+ if (!len)
+ return 0; /* Expected first length octet missing. */
+ c = *buf++; len--;
+ if (c < 192)
+ ;
+ else if (c < 224)
+ {
+ if (!len)
+ return 0; /* Expected second length octet missing. */
+ }
+ else if (c == 255)
+ {
+ if (len < 4)
+ return 0; /* Expected length octets missing */
+ }
+ }
+ else /* Old style CTB. */
+ {
+ pkttype = (ctb>>2)&0xf;
+ lenbytes = ((ctb&3)==3)? 0 : (1<<(ctb & 3));
+ if (len < lenbytes)
+ return 0; /* Not enough length bytes. */
+ }
+
+ return (pkttype == 8);
+}
+
+
+/*
+ * Check if the file is compressed, by peeking the iobuf. You need to
+ * pass the iobuf with INP. Returns true if the buffer seems to be
+ * compressed.
+ */
+int
+is_file_compressed (iobuf_t inp)
+{
+ int i;
+ char buf[32];
+ int buflen;
+
+ struct magic_compress_s
+ {
+ byte len;
+ byte extchk;
+ byte magic[5];
+ } magic[] =
+ {
+ { 3, 0, { 0x42, 0x5a, 0x68, 0x00 } }, /* bzip2 */
+ { 3, 0, { 0x1f, 0x8b, 0x08, 0x00 } }, /* gzip */
+ { 4, 0, { 0x50, 0x4b, 0x03, 0x04 } }, /* (pk)zip */
+ { 5, 0, { '%', 'P', 'D', 'F', '-'} }, /* PDF */
+ { 4, 1, { 0xff, 0xd8, 0xff, 0xe0 } }, /* Maybe JFIF */
+ { 5, 2, { 0x89, 'P','N','G', 0x0d} } /* Likely PNG */
+ };
+
+ if (!inp)
+ return 0;
+
+ for ( ; inp->chain; inp = inp->chain )
+ ;
+
+ buflen = iobuf_ioctl (inp, IOBUF_IOCTL_PEEK, sizeof buf, buf);
+ if (buflen < 0)
+ {
+ buflen = 0;
+ log_debug ("peeking at input failed\n");
+ }
+
+ if ( buflen < 6 )
+ {
+ return 0; /* Too short to check - assume uncompressed. */
+ }
+
+ for ( i = 0; i < DIM (magic); i++ )
+ {
+ if (!memcmp( buf, magic[i].magic, magic[i].len))
+ {
+ switch (magic[i].extchk)
+ {
+ case 0:
+ return 1; /* Is compressed. */
+ case 1:
+ if (buflen > 11 && !memcmp (buf + 6, "JFIF", 5))
+ return 1; /* JFIF: this likely a compressed JPEG. */
+ break;
+ case 2:
+ if (buflen > 8
+ && buf[5] == 0x0a && buf[6] == 0x1a && buf[7] == 0x0a)
+ return 1; /* This is a PNG. */
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ if (buflen >= 6 && is_openpgp_compressed_packet (buf, buflen))
+ {
+ return 1; /* Already compressed. */
+ }
+
+ return 0; /* Not detected as compressed. */
+}
--- a/common/iobuf.h
+++ b/common/iobuf.h
@@ -629,6 +629,9 @@ void iobuf_set_partial_body_length_mode (iobuf_t a, size_t len);
from the following filter (which may or may not return EOF). */
void iobuf_skip_rest (iobuf_t a, unsigned long n, int partial);
+/* Check if the file is compressed, by peeking the iobuf. */
+int is_file_compressed (iobuf_t inp);
+
#define iobuf_where(a) "[don't know]"
/* Each time a filter is allocated (via iobuf_alloc()), a
--- a/common/miscellaneous.c
+++ b/common/miscellaneous.c
@@ -415,112 +415,6 @@ decode_c_string (const char *src)
}
-/* Check whether (BUF,LEN) is valid header for an OpenPGP compressed
- * packet. LEN should be at least 6. */
-static int
-is_openpgp_compressed_packet (const unsigned char *buf, size_t len)
-{
- int c, ctb, pkttype;
- int lenbytes;
-
- ctb = *buf++; len--;
- if (!(ctb & 0x80))
- return 0; /* Invalid packet. */
-
- if ((ctb & 0x40)) /* New style (OpenPGP) CTB. */
- {
- pkttype = (ctb & 0x3f);
- if (!len)
- return 0; /* Expected first length octet missing. */
- c = *buf++; len--;
- if (c < 192)
- ;
- else if (c < 224)
- {
- if (!len)
- return 0; /* Expected second length octet missing. */
- }
- else if (c == 255)
- {
- if (len < 4)
- return 0; /* Expected length octets missing */
- }
- }
- else /* Old style CTB. */
- {
- pkttype = (ctb>>2)&0xf;
- lenbytes = ((ctb&3)==3)? 0 : (1<<(ctb & 3));
- if (len < lenbytes)
- return 0; /* Not enough length bytes. */
- }
-
- return (pkttype == 8);
-}
-
-
-
-/*
- * Check if the file is compressed. You need to pass the first bytes
- * of the file as (BUF,BUFLEN). Returns true if the buffer seems to
- * be compressed.
- */
-int
-is_file_compressed (const byte *buf, unsigned int buflen)
-{
- int i;
-
- struct magic_compress_s
- {
- byte len;
- byte extchk;
- byte magic[5];
- } magic[] =
- {
- { 3, 0, { 0x42, 0x5a, 0x68, 0x00 } }, /* bzip2 */
- { 3, 0, { 0x1f, 0x8b, 0x08, 0x00 } }, /* gzip */
- { 4, 0, { 0x50, 0x4b, 0x03, 0x04 } }, /* (pk)zip */
- { 5, 0, { '%', 'P', 'D', 'F', '-'} }, /* PDF */
- { 4, 1, { 0xff, 0xd8, 0xff, 0xe0 } }, /* Maybe JFIF */
- { 5, 2, { 0x89, 'P','N','G', 0x0d} } /* Likely PNG */
- };
-
- if ( buflen < 6 )
- {
- return 0; /* Too short to check - assume uncompressed. */
- }
-
- for ( i = 0; i < DIM (magic); i++ )
- {
- if (!memcmp( buf, magic[i].magic, magic[i].len))
- {
- switch (magic[i].extchk)
- {
- case 0:
- return 1; /* Is compressed. */
- case 1:
- if (buflen > 11 && !memcmp (buf + 6, "JFIF", 5))
- return 1; /* JFIF: this likely a compressed JPEG. */
- break;
- case 2:
- if (buflen > 8
- && buf[5] == 0x0a && buf[6] == 0x1a && buf[7] == 0x0a)
- return 1; /* This is a PNG. */
- break;
- default:
- break;
- }
- }
- }
-
- if (buflen >= 6 && is_openpgp_compressed_packet (buf, buflen))
- {
- return 1; /* Already compressed. */
- }
-
- return 0; /* Not detected as compressed. */
-}
-
-
/* Try match against each substring of multistr, delimited by | */
int
match_multistr (const char *multistr,const char *match)
--- a/common/util.h
+++ b/common/util.h
@@ -360,8 +360,6 @@ char *try_make_printable_string (const void *p, size_t n, int delim);
char *make_printable_string (const void *p, size_t n, int delim);
char *decode_c_string (const char *src);
-int is_file_compressed (const byte *buf, unsigned int buflen);
-
int match_multistr (const char *multistr,const char *match);
int gnupg_compare_version (const char *a, const char *b);
--- a/g10/cipher-aead.c
+++ b/g10/cipher-aead.c
@@ -174,8 +174,6 @@ write_header (cipher_filter_context_t *cfx, iobuf_t a)
log_debug ("aead packet: len=%lu extralen=%d\n",
(unsigned long)ed.len, ed.extralen);
- write_status_printf (STATUS_BEGIN_ENCRYPTION, "0 %d %d",
- cfx->dek->algo, ed.aead_algo);
print_cipher_algo_note (cfx->dek->algo);
if (build_packet( a, &pkt))
@@ -488,6 +486,11 @@ cipher_filter_aead (void *opaque, int control,
{
mem2str (buf, "cipher_filter_aead", *ret_len);
}
+ else if (control == IOBUFCTRL_INIT)
+ {
+ write_status_printf (STATUS_BEGIN_ENCRYPTION, "0 %d %d",
+ cfx->dek->algo, cfx->dek->use_aead);
+ }
return rc;
}
--- a/g10/cipher-cfb.c
+++ b/g10/cipher-cfb.c
@@ -72,9 +72,6 @@ write_header (cipher_filter_context_t *cfx, iobuf_t a)
log_info (_("Hint: Do not use option %s\n"), "--rfc2440");
}
- write_status_printf (STATUS_BEGIN_ENCRYPTION, "%d %d",
- ed.mdc_method, cfx->dek->algo);
-
init_packet (&pkt);
pkt.pkttype = cfx->dek->use_mdc? PKT_ENCRYPTED_MDC : PKT_ENCRYPTED;
pkt.pkt.encrypted = &ed;
@@ -182,6 +179,12 @@ cipher_filter_cfb (void *opaque, int control,
{
mem2str (buf, "cipher_filter_cfb", *ret_len);
}
+ else if (control == IOBUFCTRL_INIT)
+ {
+ write_status_printf (STATUS_BEGIN_ENCRYPTION, "%d %d",
+ cfx->dek->use_mdc ? DIGEST_ALGO_SHA1 : 0,
+ cfx->dek->algo);
+ }
return rc;
}
--- a/g10/encrypt.c
+++ b/g10/encrypt.c
@@ -410,8 +410,6 @@ encrypt_simple (const char *filename, int mode, int use_seskey)
text_filter_context_t tfx;
progress_filter_context_t *pfx;
int do_compress = !!default_compress_algo();
- char peekbuf[32];
- int peekbuflen;
if (!gnupg_rng_is_compliant (opt.compliance))
{
@@ -448,14 +446,6 @@ encrypt_simple (const char *filename, int mode, int use_seskey)
return rc;
}
- peekbuflen = iobuf_ioctl (inp, IOBUF_IOCTL_PEEK, sizeof peekbuf, peekbuf);
- if (peekbuflen < 0)
- {
- peekbuflen = 0;
- if (DBG_FILTER)
- log_debug ("peeking at input failed\n");
- }
-
handle_progress (pfx, inp, filename);
if (opt.textmode)
@@ -517,17 +507,6 @@ encrypt_simple (const char *filename, int mode, int use_seskey)
/**/ : "CFB");
}
- if (do_compress
- && cfx.dek
- && (cfx.dek->use_mdc || cfx.dek->use_aead)
- && !opt.explicit_compress_option
- && is_file_compressed (peekbuf, peekbuflen))
- {
- if (opt.verbose)
- log_info(_("'%s' already compressed\n"), filename? filename: "[stdin]");
- do_compress = 0;
- }
-
if ( rc || (rc = open_outfile (-1, filename, opt.armor? 1:0, 0, &out )))
{
iobuf_cancel (inp);
@@ -598,6 +577,24 @@ encrypt_simple (const char *filename, int mode, int use_seskey)
else
filesize = opt.set_filesize ? opt.set_filesize : 0; /* stdin */
+ /* Register the cipher filter. */
+ if (mode)
+ iobuf_push_filter (out,
+ cfx.dek->use_aead? cipher_filter_aead
+ /**/ : cipher_filter_cfb,
+ &cfx );
+
+ if (do_compress
+ && cfx.dek
+ && (cfx.dek->use_mdc || cfx.dek->use_aead)
+ && !opt.explicit_compress_option
+ && is_file_compressed (inp))
+ {
+ if (opt.verbose)
+ log_info(_("'%s' already compressed\n"), filename? filename: "[stdin]");
+ do_compress = 0;
+ }
+
if (!opt.no_literal)
{
/* Note that PT has been initialized above in !no_literal mode. */
@@ -617,13 +614,6 @@ encrypt_simple (const char *filename, int mode, int use_seskey)
pkt.pkt.generic = NULL;
}
- /* Register the cipher filter. */
- if (mode)
- iobuf_push_filter (out,
- cfx.dek->use_aead? cipher_filter_aead
- /**/ : cipher_filter_cfb,
- &cfx );
-
/* Register the compress filter. */
if ( do_compress )
{
@@ -783,7 +773,7 @@ encrypt_crypt (ctrl_t ctrl, int filefd, const char *filename,
PKT_plaintext *pt = NULL;
DEK *symkey_dek = NULL;
STRING2KEY *symkey_s2k = NULL;
- int rc = 0, rc2 = 0;
+ int rc = 0;
u32 filesize;
cipher_filter_context_t cfx;
armor_filter_context_t *afx = NULL;
@@ -792,8 +782,6 @@ encrypt_crypt (ctrl_t ctrl, int filefd, const char *filename,
progress_filter_context_t *pfx;
PK_LIST pk_list;
int do_compress;
- char peekbuf[32];
- int peekbuflen;
if (filefd != -1 && filename)
return gpg_error (GPG_ERR_INV_ARG); /* Both given. */
@@ -866,14 +854,6 @@ encrypt_crypt (ctrl_t ctrl, int filefd, const char *filename,
if (opt.verbose)
log_info (_("reading from '%s'\n"), iobuf_get_fname_nonnull (inp));
- peekbuflen = iobuf_ioctl (inp, IOBUF_IOCTL_PEEK, sizeof peekbuf, peekbuf);
- if (peekbuflen < 0)
- {
- peekbuflen = 0;
- if (DBG_FILTER)
- log_debug ("peeking at input failed\n");
- }
-
handle_progress (pfx, inp, filename);
if (opt.textmode)
@@ -900,25 +880,6 @@ encrypt_crypt (ctrl_t ctrl, int filefd, const char *filename,
if (!cfx.dek->use_aead)
cfx.dek->use_mdc = !!use_mdc (pk_list, cfx.dek->algo);
- /* Only do the is-file-already-compressed check if we are using a
- * MDC or AEAD. This forces compressed files to be re-compressed if
- * we do not have a MDC to give some protection against chosen
- * ciphertext attacks. */
- if (do_compress
- && (cfx.dek->use_mdc || cfx.dek->use_aead)
- && !opt.explicit_compress_option
- && is_file_compressed (peekbuf, peekbuflen))
- {
- if (opt.verbose)
- log_info(_("'%s' already compressed\n"), filename? filename: "[stdin]");
- do_compress = 0;
- }
- if (rc2)
- {
- rc = rc2;
- goto leave;
- }
-
make_session_key (cfx.dek);
if (DBG_CRYPTO)
log_printhex (cfx.dek->key, cfx.dek->keylen, "DEK is: ");
@@ -960,6 +921,26 @@ encrypt_crypt (ctrl_t ctrl, int filefd, const char *filename,
else
filesize = opt.set_filesize ? opt.set_filesize : 0; /* stdin */
+ /* Register the cipher filter. */
+ iobuf_push_filter (out,
+ cfx.dek->use_aead? cipher_filter_aead
+ /**/ : cipher_filter_cfb,
+ &cfx);
+
+ /* Only do the is-file-already-compressed check if we are using a
+ * MDC or AEAD. This forces compressed files to be re-compressed if
+ * we do not have a MDC to give some protection against chosen
+ * ciphertext attacks. */
+ if (do_compress
+ && (cfx.dek->use_mdc || cfx.dek->use_aead)
+ && !opt.explicit_compress_option
+ && is_file_compressed (inp))
+ {
+ if (opt.verbose)
+ log_info(_("'%s' already compressed\n"), filename? filename: "[stdin]");
+ do_compress = 0;
+ }
+
if (!opt.no_literal)
{
pt->timestamp = make_timestamp();
@@ -974,12 +955,6 @@ encrypt_crypt (ctrl_t ctrl, int filefd, const char *filename,
else
cfx.datalen = filesize && !do_compress ? filesize : 0;
- /* Register the cipher filter. */
- iobuf_push_filter (out,
- cfx.dek->use_aead? cipher_filter_aead
- /**/ : cipher_filter_cfb,
- &cfx);
-
/* Register the compress filter. */
if (do_compress)
{
--- a/g10/sign.c
+++ b/g10/sign.c
@@ -1035,9 +1035,6 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
int multifile = 0;
u32 duration=0;
pt_extra_hash_data_t extrahash = NULL;
- char peekbuf[32];
- int peekbuflen = 0;
-
pfx = new_progress_context ();
afx = new_armor_context ();
@@ -1096,14 +1093,6 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
goto leave;
}
- peekbuflen = iobuf_ioctl (inp, IOBUF_IOCTL_PEEK, sizeof peekbuf, peekbuf);
- if (peekbuflen < 0)
- {
- peekbuflen = 0;
- if (DBG_FILTER)
- log_debug ("peeking at input failed\n");
- }
-
handle_progress (pfx, inp, fname);
}
@@ -1261,7 +1250,7 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
int compr_algo = opt.compress_algo;
if (!opt.explicit_compress_option
- && is_file_compressed (peekbuf, peekbuflen))
+ && is_file_compressed (inp))
{
if (opt.verbose)
log_info(_("'%s' already compressed\n"), fname? fname: "[stdin]");
--
2.11.0
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