Add a new flag --signed-if-possible to push and send-pack that sends a
push certificate if and only if the server advertised a push cert
nonce. If not, at least warn the user that their push may not be as
secure as they thought.
Signed-off-by: Dave Borowitz <dborowitz@xxxxxxxxxx>
---
Documentation/git-push.txt | 17 +++++++++-------
Documentation/git-send-pack.txt | 16 +++++++++------
builtin/push.c | 20 ++++++++++++++++++-
builtin/send-pack.c | 6 ++++--
remote-curl.c | 16 ++++++++++-----
send-pack.c | 43 ++++++++++++++++++++++++++++++++++-------
send-pack.h | 12 +++++++++++-
transport-helper.c | 34 ++++++++++++++++----------------
transport.c | 8 +++++++-
transport.h | 5 +++--
10 files changed, 128 insertions(+), 49 deletions(-)
diff --git a/Documentation/git-push.txt b/Documentation/git-push.txt
index da0a98d..1495e34 100644
--- a/Documentation/git-push.txt
+++ b/Documentation/git-push.txt
@@ -11,7 +11,8 @@ SYNOPSIS
[verse]
'git push' [--all | --mirror | --tags] [--follow-tags] [--atomic] [-n | --dry-run] [--receive-pack=<git-receive-pack>]
[--repo=<repository>] [-f | --force] [--prune] [-v | --verbose]
- [-u | --set-upstream] [--signed]
+ [-u | --set-upstream]
+ [--[no-]signed|--sign=(true|false|if-asked)]
[--force-with-lease[=<refname>[:<expect>]]]
[--no-verify] [<repository> [<refspec>...]]
@@ -132,14 +133,16 @@ already exists on the remote side.
with configuration variable 'push.followTags'. For more
information, see 'push.followTags' in linkgit:git-config[1].
-
---signed::
+--[no-]signed::
+--sign=(true|false|if-asked)::
GPG-sign the push request to update refs on the receiving
side, to allow it to be checked by the hooks and/or be
- logged. See linkgit:git-receive-pack[1] for the details
- on the receiving end. If the attempt to sign with `gpg` fails,
- or if the server does not support signed pushes, the push will
- fail.
+ logged. If `false` or `--no-signed`, no signing will be
+ attempted. If `true` or `--signed`, the push will fail if the
+ server does not support signed pushes. If set to `if-asked`,
+ sign if and only if the server supports signed pushes. The push
+ will also fail if the actual call to `gpg --sign` fails. See
+ linkgit:git-receive-pack[1] for the details on the receiving end.
--[no-]atomic::
Use an atomic transaction on the remote side if available.
diff --git a/Documentation/git-send-pack.txt b/Documentation/git-send-pack.txt
index 0a0a3fb..6aa91e8 100644
--- a/Documentation/git-send-pack.txt
+++ b/Documentation/git-send-pack.txt
@@ -10,7 +10,8 @@ SYNOPSIS
--------
[verse]
'git send-pack' [--all] [--dry-run] [--force] [--receive-pack=<git-receive-pack>]
- [--verbose] [--thin] [--atomic] [--signed]
+ [--verbose] [--thin] [--atomic]
+ [--[no-]signed|--sign=(true|false|if-asked)]
[<host>:]<directory> [<ref>...]
DESCRIPTION
@@ -69,13 +70,16 @@ be in a separate packet, and the list must end with a flush packet.
fails to update then the entire push will fail without changing any
refs.
---signed::
+--[no-]signed::
+--sign=(true|false|if-asked)::
GPG-sign the push request to update refs on the receiving
side, to allow it to be checked by the hooks and/or be
- logged. See linkgit:git-receive-pack[1] for the details
- on the receiving end. If the attempt to sign with `gpg` fails,
- or if the server does not support signed pushes, the push will
- fail.
+ logged. If `false` or `--no-signed`, no signing will be
+ attempted. If `true` or `--signed`, the push will fail if the
+ server does not support signed pushes. If set to `if-asked`,
+ sign if and only if the server supports signed pushes. The push
+ will also fail if the actual call to `gpg --sign` fails. See
+ linkgit:git-receive-pack[1] for the details on the receiving end.
<host>::
A remote host to house the repository. When this
diff --git a/builtin/push.c b/builtin/push.c
index 57c138b..85a82cd 100644
--- a/builtin/push.c
+++ b/builtin/push.c
@@ -9,6 +9,7 @@
#include "transport.h"
#include "parse-options.h"
#include "submodule.h"
+#include "send-pack.h"
static const char * const push_usage[] = {
N_("git push [<options>] [<repository> [<refspec>...]]"),
@@ -495,6 +496,7 @@ int cmd_push(int argc, const char **argv, const char *prefix)
{
int flags = 0;
int tags = 0;
+ int push_cert = -1;
int rc;
const char *repo = NULL; /* default repository */
struct option options[] = {
@@ -526,7 +528,9 @@ int cmd_push(int argc, const char **argv, const char *prefix)
OPT_BIT(0, "no-verify", &flags, N_("bypass pre-push hook"), TRANSPORT_PUSH_NO_HOOK),
OPT_BIT(0, "follow-tags", &flags, N_("push missing but relevant tags"),
TRANSPORT_PUSH_FOLLOW_TAGS),
- OPT_BIT(0, "signed", &flags, N_("GPG sign the push"), TRANSPORT_PUSH_CERT),
+ { OPTION_CALLBACK,
+ 0, "signed", &push_cert, "yes|no|if-asked", N_("GPG sign the push"),
+ PARSE_OPT_OPTARG, option_parse_push_signed },
OPT_BIT(0, "atomic", &flags, N_("request atomic transaction on remote side"), TRANSPORT_PUSH_ATOMIC),
OPT_END()
};
@@ -548,6 +552,20 @@ int cmd_push(int argc, const char **argv, const char *prefix)
set_refspecs(argv + 1, argc - 1, repo);
}
+ switch (push_cert) {
+ case SEND_PACK_PUSH_CERT_NEVER:
+ flags &= ~(TRANSPORT_PUSH_CERT_ALWAYS | TRANSPORT_PUSH_CERT_IF_ASKED);
+ break;
+ case SEND_PACK_PUSH_CERT_ALWAYS:
+ flags |= TRANSPORT_PUSH_CERT_ALWAYS;
+ flags &= ~TRANSPORT_PUSH_CERT_IF_ASKED;
+ break;
+ case SEND_PACK_PUSH_CERT_IF_ASKED:
+ flags |= TRANSPORT_PUSH_CERT_IF_ASKED;
+ flags &= ~TRANSPORT_PUSH_CERT_ALWAYS;
+ break;
+ }
+
rc = do_push(repo, flags);
if (rc == -1)
usage_with_options(push_usage, options);
diff --git a/builtin/send-pack.c b/builtin/send-pack.c
index 5f2c744..0ce3bc8 100644
--- a/builtin/send-pack.c
+++ b/builtin/send-pack.c
@@ -118,7 +118,7 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
unsigned send_mirror = 0;
unsigned force_update = 0;
unsigned quiet = 0;
- unsigned push_cert = 0;
+ int push_cert = 0;
unsigned use_thin_pack = 0;
unsigned atomic = 0;
unsigned stateless_rpc = 0;
@@ -137,7 +137,9 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
OPT_BOOL('n' , "dry-run", &dry_run, N_("dry run")),
OPT_BOOL(0, "mirror", &send_mirror, N_("mirror all refs")),
OPT_BOOL('f', "force", &force_update, N_("force updates")),
- OPT_BOOL(0, "signed", &push_cert, N_("GPG sign the push")),
+ { OPTION_CALLBACK,
+ 0, "signed", &push_cert, "yes|no|if-asked", N_("GPG sign the push"),
+ PARSE_OPT_OPTARG, option_parse_push_signed },
OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
OPT_BOOL(0, "thin", &use_thin_pack, N_("use thin pack")),
OPT_BOOL(0, "atomic", &atomic, N_("request atomic transaction on remote side")),
diff --git a/remote-curl.c b/remote-curl.c
index af7b678..71fbbb6 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -11,6 +11,7 @@
#include "argv-array.h"
#include "credential.h"
#include "sha1-array.h"
+#include "send-pack.h"
static struct remote *remote;
/* always ends with a trailing slash */
@@ -26,7 +27,8 @@ struct options {
followtags : 1,
dry_run : 1,
thin : 1,
- push_cert : 1;
+ /* One of the SEND_PACK_PUSH_CERT_* constants. */
+ push_cert : 2;
};
static struct options options;
static struct string_list cas_options = STRING_LIST_INIT_DUP;
@@ -109,9 +111,11 @@ static int set_option(const char *name, const char *value)
return 0;
} else if (!strcmp(name, "pushcert")) {
if (!strcmp(value, "true"))
- options.push_cert = 1;
+ options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
else if (!strcmp(value, "false"))
- options.push_cert = 0;
+ options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
+ else if (!strcmp(value, "if-asked"))
+ options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
else
return -1;
return 0;
@@ -880,8 +884,10 @@ static int push_git(struct discovery *heads, int nr_spec, char **specs)
argv_array_push(&args, "--thin");
if (options.dry_run)
argv_array_push(&args, "--dry-run");
- if (options.push_cert)
- argv_array_push(&args, "--signed");
+ if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
+ argv_array_push(&args, "--signed=yes");
+ else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
+ argv_array_push(&args, "--signed=if-asked");
if (options.verbosity == 0)
argv_array_push(&args, "--quiet");
else if (options.verbosity > 1)
diff --git a/send-pack.c b/send-pack.c
index 2a64fec..c6a4030 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -12,6 +12,29 @@
#include "version.h"
#include "sha1-array.h"
#include "gpg-interface.h"
+#include "cache.h"
+
+int option_parse_push_signed(const struct option *opt,
+ const char *arg, int unset)
+{
+ if (unset) {
+ *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
+ return 0;
+ }
+ switch (git_parse_maybe_bool(arg)) {
+ case 1:
+ *(int *)(opt->value) = SEND_PACK_PUSH_CERT_ALWAYS;
+ return 0;
+ case 0:
+ *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
+ return 0;
+ }
+ if (!strcasecmp("if-asked", arg)) {
+ *(int *)(opt->value) = SEND_PACK_PUSH_CERT_IF_ASKED;
+ return 0;
+ }
+ die("bad %s argument: %s", opt->long_name, arg);
+}
static int feed_object(const unsigned char *sha1, int fd, int negative)
{
@@ -370,14 +393,20 @@ int send_pack(struct send_pack_args *args,
args->use_thin_pack = 0;
if (server_supports("atomic"))
atomic_supported = 1;
- if (args->push_cert) {
- int len;
+ if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) {
+ int len;
push_cert_nonce = server_feature_value("push-cert", &len);
- if (!push_cert_nonce)
+ if (push_cert_nonce) {
+ reject_invalid_nonce(push_cert_nonce, len);
+ push_cert_nonce = xmemdupz(push_cert_nonce, len);
+ } else if (args->push_cert == SEND_PACK_PUSH_CERT_ALWAYS) {
die(_("the receiving end does not support --signed push"));
- reject_invalid_nonce(push_cert_nonce, len);
- push_cert_nonce = xmemdupz(push_cert_nonce, len);
+ } else if (args->push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) {
+ warning(_("not sending a push certificate since the"
+ " receiving end does not support --signed"
+ " push"));
+ }
}
if (!remote_refs) {
@@ -413,7 +442,7 @@ int send_pack(struct send_pack_args *args,
if (!args->dry_run)
advertise_shallow_grafts_buf(&req_buf);
- if (!args->dry_run && args->push_cert)
+ if (!args->dry_run && push_cert_nonce)
cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
cap_buf.buf, push_cert_nonce);
@@ -452,7 +481,7 @@ int send_pack(struct send_pack_args *args,
for (ref = remote_refs; ref; ref = ref->next) {
char *old_hex, *new_hex;
- if (args->dry_run || args->push_cert)
+ if (args->dry_run || push_cert_nonce)
continue;
if (check_to_send_update(ref, args) < 0)
diff --git a/send-pack.h b/send-pack.h
index b664648..57f222a 100644
--- a/send-pack.h
+++ b/send-pack.h
@@ -1,6 +1,11 @@
#ifndef SEND_PACK_H
#define SEND_PACK_H
+/* Possible values for push_cert field in send_pack_args. */
+#define SEND_PACK_PUSH_CERT_NEVER 0
+#define SEND_PACK_PUSH_CERT_IF_ASKED 1
+#define SEND_PACK_PUSH_CERT_ALWAYS 2
+
struct send_pack_args {
const char *url;
unsigned verbose:1,
@@ -12,11 +17,16 @@ struct send_pack_args {
use_thin_pack:1,
use_ofs_delta:1,
dry_run:1,
- push_cert:1,
+ /* One of the SEND_PACK_PUSH_CERT_* constants. */
+ push_cert:2,
stateless_rpc:1,
atomic:1;
};
+struct option;
+int option_parse_push_signed(const struct option *opt,
+ const char *arg, int unset);
+
int send_pack(struct send_pack_args *args,
int fd[], struct child_process *conn,
struct ref *remote_refs, struct sha1_array *extra_have);
diff --git a/transport-helper.c b/transport-helper.c
index 5d99a6b..fd5723f 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -257,7 +257,6 @@ static const char *boolean_options[] = {
TRANS_OPT_THIN,
TRANS_OPT_KEEP,
TRANS_OPT_FOLLOWTAGS,
- TRANS_OPT_PUSH_CERT
};
static int set_helper_option(struct transport *transport,
@@ -763,6 +762,21 @@ static int push_update_refs_status(struct helper_data *data,
return ret;
}
+static void set_common_push_options(struct transport *transport,
+ const char *name, int flags)
+{
+ if (flags & TRANSPORT_PUSH_DRY_RUN) {
+ if (set_helper_option(transport, "dry-run", "true") != 0)
+ die("helper %s does not support dry-run", name);
+ } else if (flags & TRANSPORT_PUSH_CERT_ALWAYS) {
+ if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0)
+ die("helper %s does not support --signed", name);
+ } else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED) {
+ if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "if-asked") != 0)
+ die("helper %s does not support --signed=if-asked", name);
+ }
+}
+
static int push_refs_with_push(struct transport *transport,
struct ref *remote_refs, int flags)
{
@@ -830,14 +844,7 @@ static int push_refs_with_push(struct transport *transport,
for_each_string_list_item(cas_option, &cas_options)
set_helper_option(transport, "cas", cas_option->string);
-
- if (flags & TRANSPORT_PUSH_DRY_RUN) {
- if (set_helper_option(transport, "dry-run", "true") != 0)
- die("helper %s does not support dry-run", data->name);
- } else if (flags & TRANSPORT_PUSH_CERT) {
- if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0)
- die("helper %s does not support --signed", data->name);
- }
+ set_common_push_options(transport, data->name, flags);
strbuf_addch(&buf, '\n');
sendline(data, &buf);
@@ -858,14 +865,7 @@ static int push_refs_with_export(struct transport *transport,
if (!data->refspecs)
die("remote-helper doesn't support push; refspec needed");
- if (flags & TRANSPORT_PUSH_DRY_RUN) {
- if (set_helper_option(transport, "dry-run", "true") != 0)
- die("helper %s does not support dry-run", data->name);
- } else if (flags & TRANSPORT_PUSH_CERT) {
- if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0)
- die("helper %s does not support --signed", data->name);
- }
-
+ set_common_push_options(transport, data->name, flags);
if (flags & TRANSPORT_PUSH_FORCE) {
if (set_helper_option(transport, "force", "true") != 0)
warning("helper %s does not support 'force'", data->name);
diff --git a/transport.c b/transport.c
index 3dd6e30..ebe3b3b 100644
--- a/transport.c
+++ b/transport.c
@@ -826,10 +826,16 @@ static int git_transport_push(struct transport *transport, struct ref *remote_re
args.progress = transport->progress;
args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
- args.push_cert = !!(flags & TRANSPORT_PUSH_CERT);
args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
args.url = transport->url;
+ if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
+ args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
+ else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
+ args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
+ else
+ args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
+
ret = send_pack(&args, data->fd, data->conn, remote_refs,
&data->extra_have);
diff --git a/transport.h b/transport.h
index 79190df..d682b77 100644
--- a/transport.h
+++ b/transport.h
@@ -123,8 +123,9 @@ struct transport {
#define TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND 256
#define TRANSPORT_PUSH_NO_HOOK 512
#define TRANSPORT_PUSH_FOLLOW_TAGS 1024
-#define TRANSPORT_PUSH_CERT 2048
-#define TRANSPORT_PUSH_ATOMIC 4096
+#define TRANSPORT_PUSH_CERT_ALWAYS 2048
+#define TRANSPORT_PUSH_CERT_IF_ASKED 4096
+#define TRANSPORT_PUSH_ATOMIC 8192
#define TRANSPORT_SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
#define TRANSPORT_SUMMARY(x) (int)(TRANSPORT_SUMMARY_WIDTH + strlen(x) - gettext_width(x)), (x)
--
2.5.0.276.gf5e568e
--
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