File gnupg-2.3.3-file-is-digest.patch of Package gnupg2
diff --git a/g10/gpg.c b/g10/gpg.c
index 411b6c097..ce910ce32 100644
--- a/g10/gpg.c
+++ b/g10/gpg.c
@@ -391,6 +391,7 @@ enum cmd_and_opt_values
oTTYtype,
oLCctype,
oLCmessages,
+ oFileIsDigest,
oXauthority,
oGroup,
oUnGroup,
@@ -643,6 +644,7 @@ static gpgrt_opt_t opts[] = {
ARGPARSE_s_s (oTempDir, "temp-directory", "@"),
ARGPARSE_s_s (oExecPath, "exec-path", "@"),
ARGPARSE_s_n (oExpert, "expert", "@"),
+ ARGPARSE_s_n (oFileIsDigest, "file-is-digest", "@"),
ARGPARSE_s_n (oNoExpert, "no-expert", "@"),
ARGPARSE_s_n (oNoSecmemWarn, "no-secmem-warning", "@"),
ARGPARSE_s_n (oRequireSecmem, "require-secmem", "@"),
@@ -2469,6 +2471,7 @@ main (int argc, char **argv)
opt.keyid_format = KF_NONE;
opt.def_sig_expire = "0";
opt.def_cert_expire = "0";
+ opt.file_is_digest = 0;
opt.passphrase_repeat = 1;
opt.emit_version = 0;
opt.weak_digests = NULL;
@@ -3081,6 +3084,7 @@ main (int argc, char **argv)
case oPhotoViewer: opt.photo_viewer = pargs.r.ret_str; break;
case oForceAEAD: opt.force_aead = 1; break;
+ case oFileIsDigest: opt.file_is_digest = 1; break;
case oDisableSignerUID: opt.flags.disable_signer_uid = 1; break;
case oIncludeKeyBlock: opt.flags.include_key_block = 1; break;
diff --git a/g10/options.h b/g10/options.h
index 761d95830..18e375b37 100644
--- a/g10/options.h
+++ b/g10/options.h
@@ -217,6 +217,7 @@ struct
int no_auto_check_trustdb;
int preserve_permissions;
int no_homedir_creation;
+ int file_is_digest;
struct groupitem *grouplist;
int mangle_dos_filenames;
int enable_progress_filter;
diff --git a/g10/sign.c b/g10/sign.c
index ea3de620b..a56578daa 100644
--- a/g10/sign.c
+++ b/g10/sign.c
@@ -40,6 +40,7 @@
#include "pkglue.h"
#include "../common/sysutils.h"
#include "call-agent.h"
+#include "../common/host2net.h"
#include "../common/mbox-util.h"
#include "../common/compliance.h"
@@ -940,6 +941,8 @@ write_signature_packets (ctrl_t ctrl,
if (pk->version >= 5)
sig->version = 5; /* Required for v5 keys. */
+ else if (opt.file_is_digest)
+ sig->version = 3;
else
sig->version = 4; /* Required. */
@@ -957,14 +960,22 @@ write_signature_packets (ctrl_t ctrl,
if (gcry_md_copy (&md, hash))
BUG ();
- build_sig_subpkt_from_sig (sig, pk);
- mk_notation_policy_etc (ctrl, sig, NULL, pk);
- if (opt.flags.include_key_block && IS_SIG (sig))
- err = mk_sig_subpkt_key_block (ctrl, sig, pk);
- else
- err = 0;
- hash_sigversion_to_magic (md, sig, extrahash);
- gcry_md_final (md);
+ if (!opt.file_is_digest)
+ {
+ build_sig_subpkt_from_sig (sig, pk);
+ mk_notation_policy_etc (ctrl, sig, NULL, pk);
+ if (opt.flags.include_key_block && IS_SIG (sig))
+ err = mk_sig_subpkt_key_block (ctrl, sig, pk);
+ else
+ err = 0;
+
+ hash_sigversion_to_magic (md, sig, extrahash);
+ gcry_md_final (md);
+ }
+ else if (sig->version >= 4)
+ {
+ log_bug("files-are-digests doesn't work with v4 sigs\n");
+ }
if (!err)
err = do_sign (ctrl, pk, sig, md, hash_for (pk), cache_nonce, 0);
@@ -1029,6 +1040,8 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
SK_LIST sk_rover = NULL;
int multifile = 0;
u32 duration=0;
+ int sigclass = 0x00;
+ u32 timestamp = 0;
pt_extra_hash_data_t extrahash = NULL;
pfx = new_progress_context ();
@@ -1048,7 +1061,16 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
fname = NULL;
if (fname && filenames->next && (!detached || encryptflag))
- log_bug ("multiple files can only be detached signed");
+ log_bug ("multiple files can only be detached signed\n");
+
+ if (opt.file_is_digest && (multifile || !fname))
+ log_bug ("file-is-digest only works with one file\n");
+ if (opt.file_is_digest && !detached)
+ log_bug ("file-is-digest can only write detached signatures\n");
+ if (opt.file_is_digest && !opt.def_digest_algo)
+ log_bug ("file-is-digest needs --digest-algo\n");
+ if (opt.file_is_digest && opt.textmode)
+ log_bug ("file-is-digest doesn't work with --textmode\n");
if (encryptflag == 2
&& (rc = setup_symkey (&efx.symkey_s2k, &efx.symkey_dek)))
@@ -1069,7 +1091,7 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
goto leave;
/* Prepare iobufs. */
- if (multifile) /* have list of filenames */
+ if (multifile || opt.file_is_digest) /* have list of filenames */
inp = NULL; /* we do it later */
else
{
@@ -1224,7 +1246,7 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
for (sk_rover = sk_list; sk_rover; sk_rover = sk_rover->next)
gcry_md_enable (mfx.md, hash_for (sk_rover->pk));
- if (!multifile)
+ if (!multifile && !opt.file_is_digest)
iobuf_push_filter (inp, md_filter, &mfx);
if (detached && !encryptflag)
@@ -1284,6 +1306,8 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
write_status_begin_signing (mfx.md);
+ sigclass = opt.textmode && !outfile? 0x01 : 0x00;
+
/* Setup the inner packet. */
if (detached)
{
@@ -1329,6 +1353,49 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
if (opt.verbose)
log_printf ("\n");
}
+ else if (opt.file_is_digest)
+ {
+ byte *mdb, ts[5];
+ size_t mdlen;
+ const char *fp;
+ int c, d;
+
+ gcry_md_final(mfx.md);
+ /* this assumes gcry_md_read returns the same buffer */
+ mdb = gcry_md_read(mfx.md, opt.def_digest_algo);
+ mdlen = gcry_md_get_algo_dlen(opt.def_digest_algo);
+ if (strlen(fname) != mdlen * 2 + 11)
+ log_bug("digests must be %zu + @ + 5 bytes\n", mdlen);
+ d = -1;
+ for (fp = fname ; *fp; )
+ {
+ c = *fp++;
+ if (c >= '0' && c <= '9')
+ c -= '0';
+ else if (c >= 'a' && c <= 'f')
+ c -= 'a' - 10;
+ else if (c >= 'A' && c <= 'F')
+ c -= 'A' - 10;
+ else
+ log_bug("filename is not hex\n");
+ if (d >= 0)
+ {
+ *mdb++ = d << 4 | c;
+ c = -1;
+ if (--mdlen == 0)
+ {
+ mdb = ts;
+ if (*fp++ != '@')
+ log_bug("missing time separator\n");
+ }
+ }
+ d = c;
+ }
+ sigclass = ts[0];
+ if (sigclass != 0x00 && sigclass != 0x01)
+ log_bug("bad cipher class\n");
+ timestamp = buf32_to_u32(ts + 1);
+ }
else
{
/* Read, so that the filter can calculate the digest. */
@@ -1350,8 +1417,8 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
/* Write the signatures. */
rc = write_signature_packets (ctrl, sk_list, out, mfx.md, extrahash,
- opt.textmode && !outfile? 0x01 : 0x00,
- 0, duration, detached ? 'D':'S', NULL);
+ sigclass,
+ timestamp, duration, detached ? 'D':'S', NULL);
if (rc)
goto leave;
