diff options
| -rw-r--r-- | Documentation/config.txt | 19 | ||||
| -rw-r--r-- | Documentation/git-push.txt | 9 | ||||
| -rw-r--r-- | Documentation/git-receive-pack.txt | 65 | ||||
| -rw-r--r-- | Documentation/technical/pack-protocol.txt | 49 | ||||
| -rw-r--r-- | Documentation/technical/protocol-capabilities.txt | 13 | ||||
| -rw-r--r-- | builtin/push.c | 1 | ||||
| -rw-r--r-- | builtin/receive-pack.c | 393 | ||||
| -rw-r--r-- | builtin/send-pack.c | 4 | ||||
| -rw-r--r-- | commit.c | 36 | ||||
| -rw-r--r-- | gpg-interface.c | 57 | ||||
| -rw-r--r-- | gpg-interface.h | 17 | ||||
| -rw-r--r-- | remote-curl.c | 13 | ||||
| -rw-r--r-- | send-pack.c | 201 | ||||
| -rw-r--r-- | send-pack.h | 2 | ||||
| -rw-r--r-- | t/lib-httpd/apache.conf | 1 | ||||
| -rwxr-xr-x | t/t5534-push-signed.sh | 127 | ||||
| -rwxr-xr-x | t/t5541-http-push-smart.sh | 41 | ||||
| -rw-r--r-- | t/test-lib.sh | 3 | ||||
| -rw-r--r-- | tag.c | 20 | ||||
| -rw-r--r-- | tag.h | 1 | ||||
| -rw-r--r-- | transport-helper.c | 9 | ||||
| -rw-r--r-- | transport.c | 5 | ||||
| -rw-r--r-- | transport.h | 5 |
23 files changed, 932 insertions, 159 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt index 3b5b24aeb..04a1e2f37 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -2044,6 +2044,25 @@ receive.autogc:: receiving data from git-push and updating refs. You can stop it by setting this variable to false. +receive.certnonceseed:: + By setting this variable to a string, `git receive-pack` + will accept a `git push --signed` and verifies it by using + a "nonce" protected by HMAC using this string as a secret + key. + +receive.certnonceslop:: + When a `git push --signed` sent a push certificate with a + "nonce" that was issued by a receive-pack serving the same + repository within this many seconds, export the "nonce" + found in the certificate to `GIT_PUSH_CERT_NONCE` to the + hooks (instead of what the receive-pack asked the sending + side to include). This may allow writing checks in + `pre-receive` and `post-receive` a bit easier. Instead of + checking `GIT_PUSH_CERT_NONCE_SLOP` environment variable + that records by how many seconds the nonce is stale to + decide if they want to accept the certificate, they only + can check `GIT_PUSH_CERT_NONCE_STATUS` is `OK`. + receive.fsckObjects:: If it is set to true, git-receive-pack will check all received objects. It will abort in the case of a malformed object or a diff --git a/Documentation/git-push.txt b/Documentation/git-push.txt index c0d7403b9..b17283ab7 100644 --- a/Documentation/git-push.txt +++ b/Documentation/git-push.txt @@ -10,7 +10,8 @@ SYNOPSIS -------- [verse] 'git push' [--all | --mirror | --tags] [--follow-tags] [-n | --dry-run] [--receive-pack=<git-receive-pack>] - [--repo=<repository>] [-f | --force] [--prune] [-v | --verbose] [-u | --set-upstream] + [--repo=<repository>] [-f | --force] [--prune] [-v | --verbose] + [-u | --set-upstream] [--signed] [--force-with-lease[=<refname>[:<expect>]]] [--no-verify] [<repository> [<refspec>...]] @@ -129,6 +130,12 @@ already exists on the remote side. from the remote but are pointing at commit-ish that are reachable from the refs being pushed. +--signed:: + 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. + --receive-pack=<git-receive-pack>:: --exec=<git-receive-pack>:: Path to the 'git-receive-pack' program on the remote diff --git a/Documentation/git-receive-pack.txt b/Documentation/git-receive-pack.txt index b1f7dc643..9016960e2 100644 --- a/Documentation/git-receive-pack.txt +++ b/Documentation/git-receive-pack.txt @@ -53,6 +53,56 @@ the update. Refs to be created will have sha1-old equal to 0\{40}, while refs to be deleted will have sha1-new equal to 0\{40}, otherwise sha1-old and sha1-new should be valid objects in the repository. +When accepting a signed push (see linkgit:git-push[1]), the signed +push certificate is stored in a blob and an environment variable +`GIT_PUSH_CERT` can be consulted for its object name. See the +description of `post-receive` hook for an example. In addition, the +certificate is verified using GPG and the result is exported with +the following environment variables: + +`GIT_PUSH_CERT_SIGNER`:: + The name and the e-mail address of the owner of the key that + signed the push certificate. + +`GIT_PUSH_CERT_KEY`:: + The GPG key ID of the key that signed the push certificate. + +`GIT_PUSH_CERT_STATUS`:: + The status of GPG verification of the push certificate, + using the same mnemonic as used in `%G?` format of `git log` + family of commands (see linkgit:git-log[1]). + +`GIT_PUSH_CERT_NONCE`:: + The nonce string the process asked the signer to include + in the push certificate. If this does not match the value + recorded on the "nonce" header in the push certificate, it + may indicate that the certificate is a valid one that is + being replayed from a separate "git push" session. + +`GIT_PUSH_CERT_NONCE_STATUS`:: +`UNSOLICITED`;; + "git push --signed" sent a nonce when we did not ask it to + send one. +`MISSING`;; + "git push --signed" did not send any nonce header. +`BAD`;; + "git push --signed" sent a bogus nonce. +`OK`;; + "git push --signed" sent the nonce we asked it to send. +`SLOP`;; + "git push --signed" sent a nonce different from what we + asked it to send now, but in a previous session. See + `GIT_PUSH_CERT_NONCE_SLOP` environment variable. + +`GIT_PUSH_CERT_NONCE_SLOP`:: + "git push --signed" sent a nonce different from what we + asked it to send now, but in a different session whose + starting time is different by this many seconds from the + current session. Only meaningful when + `GIT_PUSH_CERT_NONCE_STATUS` says `SLOP`. + Also read about `receive.certnonceslop` variable in + linkgit:git-config[1]. + This hook is called before any refname is updated and before any fast-forward checks are performed. @@ -101,9 +151,14 @@ the update. Refs that were created will have sha1-old equal to 0\{40}, otherwise sha1-old and sha1-new should be valid objects in the repository. +The `GIT_PUSH_CERT*` environment variables can be inspected, just as +in `pre-receive` hook, after accepting a signed push. + Using this hook, it is easy to generate mails describing the updates to the repository. This example script sends one mail message per -ref listing the commits pushed to the repository: +ref listing the commits pushed to the repository, and logs the push +certificates of signed pushes with good signatures to a logger +service: #!/bin/sh # mail out commit update information. @@ -119,6 +174,14 @@ ref listing the commits pushed to the repository: fi | mail -s "Changes to ref $ref" commit-list@mydomain done + # log signed push certificate, if any + if test -n "${GIT_PUSH_CERT-}" && test ${GIT_PUSH_CERT_STATUS} = G + then + ( + echo expected nonce is ${GIT_PUSH_NONCE} + git cat-file blob ${GIT_PUSH_CERT} + ) | mail -s "push certificate from $GIT_PUSH_CERT_SIGNER" push-log@mydomain + fi exit 0 The exit code from this hook invocation is ignored, however a diff --git a/Documentation/technical/pack-protocol.txt b/Documentation/technical/pack-protocol.txt index 569c48a35..462e20645 100644 --- a/Documentation/technical/pack-protocol.txt +++ b/Documentation/technical/pack-protocol.txt @@ -212,9 +212,9 @@ out of what the server said it could do with the first 'want' line. want-list = first-want *additional-want - shallow-line = PKT_LINE("shallow" SP obj-id) + shallow-line = PKT-LINE("shallow" SP obj-id) - depth-request = PKT_LINE("deepen" SP depth) + depth-request = PKT-LINE("deepen" SP depth) first-want = PKT-LINE("want" SP obj-id SP capability-list LF) additional-want = PKT-LINE("want" SP obj-id LF) @@ -465,7 +465,7 @@ contain all the objects that the server will need to complete the new references. ---- - update-request = *shallow command-list [pack-file] + update-request = *shallow ( command-list | push-cert ) [pack-file] shallow = PKT-LINE("shallow" SP obj-id LF) @@ -481,12 +481,27 @@ references. old-id = obj-id new-id = obj-id + push-cert = PKT-LINE("push-cert" NUL capability-list LF) + PKT-LINE("certificate version 0.1" LF) + PKT-LINE("pusher" SP ident LF) + PKT-LINE("pushee" SP url LF) + PKT-LINE("nonce" SP nonce LF) + PKT-LINE(LF) + *PKT-LINE(command LF) + *PKT-LINE(gpg-signature-lines LF) + PKT-LINE("push-cert-end" LF) + pack-file = "PACK" 28*(OCTET) ---- If the receiving end does not support delete-refs, the sending end MUST NOT ask for delete command. +If the receiving end does not support push-cert, the sending end +MUST NOT send a push-cert command. When a push-cert command is +sent, command-list MUST NOT be sent; the commands recorded in the +push certificate is used instead. + The pack-file MUST NOT be sent if the only command used is 'delete'. A pack-file MUST be sent if either create or update command is used, @@ -501,6 +516,34 @@ was being processed (the obj-id is still the same as the old-id), and it will run any update hooks to make sure that the update is acceptable. If all of that is fine, the server will then update the references. +Push Certificate +---------------- + +A push certificate begins with a set of header lines. After the +header and an empty line, the protocol commands follow, one per +line. + +Currently, the following header fields are defined: + +`pusher` ident:: + Identify the GPG key in "Human Readable Name <email@address>" + format. + +`pushee` url:: + The repository URL (anonymized, if the URL contains + authentication material) the user who ran `git push` + intended to push into. + +`nonce` nonce:: + The 'nonce' string the receiving repository asked the + pushing user to include in the certificate, to prevent + replay attacks. + +The GPG signature lines are a detached signature for the contents +recorded in the push certificate before the signature block begins. +The detached signature is used to certify that the commands were +given by the pusher, who must be the signer. + Report Status ------------- diff --git a/Documentation/technical/protocol-capabilities.txt b/Documentation/technical/protocol-capabilities.txt index e17434384..0c92deebc 100644 --- a/Documentation/technical/protocol-capabilities.txt +++ b/Documentation/technical/protocol-capabilities.txt @@ -18,8 +18,8 @@ was sent. Server MUST NOT ignore capabilities that client requested and server advertised. As a consequence of these rules, server MUST NOT advertise capabilities it does not understand. -The 'report-status', 'delete-refs', and 'quiet' capabilities are sent and -recognized by the receive-pack (push to server) process. +The 'report-status', 'delete-refs', 'quiet', and 'push-cert' capabilities +are sent and recognized by the receive-pack (push to server) process. The 'ofs-delta' and 'side-band-64k' capabilities are sent and recognized by both upload-pack and receive-pack protocols. The 'agent' capability @@ -250,3 +250,12 @@ allow-tip-sha1-in-want If the upload-pack server advertises this capability, fetch-pack may send "want" lines with SHA-1s that exist at the server but are not advertised by upload-pack. + +push-cert=<nonce> +----------------- + +The receive-pack server that advertises this capability is willing +to accept a signed push certificate, and asks the <nonce> to be +included in the push certificate. A send-pack client MUST NOT +send a push-cert packet unless the receive-pack server advertises +this capability. diff --git a/builtin/push.c b/builtin/push.c index f50e3d5e7..ae56f73a6 100644 --- a/builtin/push.c +++ b/builtin/push.c @@ -506,6 +506,7 @@ 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), OPT_END() }; diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c index daf0600ca..a01ac2096 100644 --- a/builtin/receive-pack.c +++ b/builtin/receive-pack.c @@ -15,6 +15,8 @@ #include "connected.h" #include "argv-array.h" #include "version.h" +#include "tag.h" +#include "gpg-interface.h" #include "sigchain.h" static const char receive_pack_usage[] = "git receive-pack <git-dir>"; @@ -42,11 +44,27 @@ static int prefer_ofs_delta = 1; static int auto_update_server_info; static int auto_gc = 1; static int fix_thin = 1; +static int stateless_rpc; +static const char *service_dir; static const char *head_name; static void *head_name_to_free; static int sent_capabilities; static int shallow_update; static const char *alt_shallow_file; +static struct strbuf push_cert = STRBUF_INIT; +static unsigned char push_cert_sha1[20]; +static struct signature_check sigcheck; +static const char *push_cert_nonce; +static const char *cert_nonce_seed; + +static const char *NONCE_UNSOLICITED = "UNSOLICITED"; +static const char *NONCE_BAD = "BAD"; +static const char *NONCE_MISSING = "MISSING"; +static const char *NONCE_OK = "OK"; +static const char *NONCE_SLOP = "SLOP"; +static const char *nonce_status; +static long nonce_stamp_slop; +static unsigned long nonce_stamp_slop_limit; static enum deny_action parse_deny_action(const char *var, const char *value) { @@ -130,6 +148,14 @@ static int receive_pack_config(const char *var, const char *value, void *cb) return 0; } + if (strcmp(var, "receive.certnonceseed") == 0) + return git_config_string(&cert_nonce_seed, var, value); + + if (strcmp(var, "receive.certnonceslop") == 0) { + nonce_stamp_slop_limit = git_config_ulong(var, value); + return 0; + } + return git_default_config(var, value, cb); } @@ -138,15 +164,23 @@ static void show_ref(const char *path, const unsigned char *sha1) if (ref_is_hidden(path)) return; - if (sent_capabilities) + if (sent_capabilities) { packet_write(1, "%s %s\n", sha1_to_hex(sha1), path); - else - packet_write(1, "%s %s%c%s%s agent=%s\n", - sha1_to_hex(sha1), path, 0, - " report-status delete-refs side-band-64k quiet", - prefer_ofs_delta ? " ofs-delta" : "", - git_user_agent_sanitized()); - sent_capabilities = 1; + } else { + struct strbuf cap = STRBUF_INIT; + + strbuf_addstr(&cap, + "report-status delete-refs side-band-64k quiet"); + if (prefer_ofs_delta) + strbuf_addstr(&cap, " ofs-delta"); + if (push_cert_nonce) + strbuf_addf(&cap, " push-cert=%s", push_cert_nonce); + strbuf_addf(&cap, " agent=%s", git_user_agent_sanitized()); + packet_write(1, "%s %s%c%s\n", + sha1_to_hex(sha1), path, 0, cap.buf); + strbuf_release(&cap); + sent_capabilities = 1; + } } static int show_ref_cb(const char *path, const unsigned char *sha1, int flag, void *unused) @@ -253,6 +287,222 @@ static int copy_to_sideband(int in, int out, void *arg) return 0; } +#define HMAC_BLOCK_SIZE 64 + +static void hmac_sha1(unsigned char *out, + const char *key_in, size_t key_len, + const char *text, size_t text_len) +{ + unsigned char key[HMAC_BLOCK_SIZE]; + unsigned char k_ipad[HMAC_BLOCK_SIZE]; + unsigned char k_opad[HMAC_BLOCK_SIZE]; + int i; + git_SHA_CTX ctx; + + /* RFC 2104 2. (1) */ + memset(key, '\0', HMAC_BLOCK_SIZE); + if (HMAC_BLOCK_SIZE < key_len) { + git_SHA1_Init(&ctx); + git_SHA1_Update(&ctx, key_in, key_len); + git_SHA1_Final(key, &ctx); + } else { + memcpy(key, key_in, key_len); + } + + /* RFC 2104 2. (2) & (5) */ + for (i = 0; i < sizeof(key); i++) { + k_ipad[i] = key[i] ^ 0x36; + k_opad[i] = key[i] ^ 0x5c; + } + + /* RFC 2104 2. (3) & (4) */ + git_SHA1_Init(&ctx); + git_SHA1_Update(&ctx, k_ipad, sizeof(k_ipad)); + git_SHA1_Update(&ctx, text, text_len); + git_SHA1_Final(out, &ctx); + + /* RFC 2104 2. (6) & (7) */ + git_SHA1_Init(&ctx); + git_SHA1_Update(&ctx, k_opad, sizeof(k_opad)); + git_SHA1_Update(&ctx, out, 20); + git_SHA1_Final(out, &ctx); +} + +static char *prepare_push_cert_nonce(const char *path, unsigned long stamp) +{ + struct strbuf buf = STRBUF_INIT; + unsigned char sha1[20]; + + strbuf_addf(&buf, "%s:%lu", path, stamp); + hmac_sha1(sha1, buf.buf, buf.len, cert_nonce_seed, strlen(cert_nonce_seed));; + strbuf_release(&buf); + + /* RFC 2104 5. HMAC-SHA1-80 */ + strbuf_addf(&buf, "%lu-%.*s", stamp, 20, sha1_to_hex(sha1)); + return strbuf_detach(&buf, NULL); +} + +/* + * NEEDSWORK: reuse find_commit_header() from jk/commit-author-parsing + * after dropping "_commit" from its name and possibly moving it out + * of commit.c + */ +static char *find_header(const char *msg, size_t len, const char *key) +{ + int key_len = strlen(key); + const char *line = msg; + + while (line && line < msg + len) { + const char *eol = strchrnul(line, '\n'); + + if ((msg + len <= eol) || line == eol) + return NULL; + if (line + key_len < eol && + !memcmp(line, key, key_len) && line[key_len] == ' ') { + int offset = key_len + 1; + return xmemdupz(line + offset, (eol - line) - offset); + } + line = *eol ? eol + 1 : NULL; + } + return NULL; +} + +static const char *check_nonce(const char *buf, size_t len) +{ + char *nonce = find_header(buf, len, "nonce"); + unsigned long stamp, ostamp; + char *bohmac, *expect = NULL; + const char *retval = NONCE_BAD; + + if (!nonce) { + retval = NONCE_MISSING; + goto leave; + } else if (!push_cert_nonce) { + retval = NONCE_UNSOLICITED; + goto leave; + } else if (!strcmp(push_cert_nonce, nonce)) { + retval = NONCE_OK; + goto leave; + } + + if (!stateless_rpc) { + /* returned nonce MUST match what we gave out earlier */ + retval = NONCE_BAD; + goto leave; + } + + /* + * In stateless mode, we may be receiving a nonce issued by + * another instance of the server that serving the same + * repository, and the timestamps may not match, but the + * nonce-seed and dir should match, so we can recompute and + * report the time slop. + * + * In addition, when a nonce issued by another instance has + * timestamp within receive.certnonceslop seconds, we pretend + * as if we issued that nonce when reporting to the hook. + */ + + /* nonce is concat(<seconds-since-epoch>, "-", <hmac>) */ + if (*nonce <= '0' || '9' < *nonce) { + retval = NONCE_BAD; + goto leave; + } + stamp = strtoul(nonce, &bohmac, 10); + if (bohmac == nonce || bohmac[0] != '-') { + retval = NONCE_BAD; + goto leave; + } + + expect = prepare_push_cert_nonce(service_dir, stamp); + if (strcmp(expect, nonce)) { + /* Not what we would have signed earlier */ + retval = NONCE_BAD; + goto leave; + } + + /* + * By how many seconds is this nonce stale? Negative value + * would mean it was issued by another server with its clock + * skewed in the future. + */ + ostamp = strtoul(push_cert_nonce, NULL, 10); + nonce_stamp_slop = (long)ostamp - (long)stamp; + + if (nonce_stamp_slop_limit && + abs(nonce_stamp_slop) <= nonce_stamp_slop_limit) { + /* + * Pretend as if the received nonce (which passes the + * HMAC check, so it is not a forged by third-party) + * is what we issued. + */ + free((void *)push_cert_nonce); + push_cert_nonce = xstrdup(nonce); + retval = NONCE_OK; + } else { + retval = NONCE_SLOP; + } + +leave: + free(nonce); + free(expect); + return retval; +} + +static void prepare_push_cert_sha1(struct child_process *proc) +{ + static int already_done; + struct argv_array env = ARGV_ARRAY_INIT; + + if (!push_cert.len) + return; + + if (!already_done) { + struct strbuf gpg_output = STRBUF_INIT; + struct strbuf gpg_status = STRBUF_INIT; + int bogs /* beginning_of_gpg_sig */; + + already_done = 1; + if (write_sha1_file(push_cert.buf, push_cert.len, "blob", push_cert_sha1)) + hashclr(push_cert_sha1); + + memset(&sigcheck, '\0', sizeof(sigcheck)); + sigcheck.result = 'N'; + + bogs = parse_signature(push_cert.buf, push_cert.len); + if (verify_signed_buffer(push_cert.buf, bogs, + push_cert.buf + bogs, push_cert.len - bogs, + &gpg_output, &gpg_status) < 0) { + ; /* error running gpg */ + } else { + sigcheck.payload = push_cert.buf; + sigcheck.gpg_output = gpg_output.buf; + sigcheck.gpg_status = gpg_status.buf; + parse_gpg_output(&sigcheck); + } + + strbuf_release(&gpg_output); + strbuf_release(&gpg_status); + nonce_status = check_nonce(push_cert.buf, bogs); + } + if (!is_null_sha1(push_cert_sha1)) { + argv_array_pushf(&env, "GIT_PUSH_CERT=%s", sha1_to_hex(push_cert_sha1)); + argv_array_pushf(&env, "GIT_PUSH_CERT_SIGNER=%s", + sigcheck.signer ? sigcheck.signer : ""); + argv_array_pushf(&env, "GIT_PUSH_CERT_KEY=%s", + sigcheck.key ? sigcheck.key : ""); + argv_array_pushf(&env, "GIT_PUSH_CERT_STATUS=%c", sigcheck.result); + if (push_cert_nonce) { + argv_array_pushf(&env, "GIT_PUSH_CERT_NONCE=%s", push_cert_nonce); + argv_array_pushf(&env, "GIT_PUSH_CERT_NONCE_STATUS=%s", nonce_status); + if (nonce_status == NONCE_SLOP) + argv_array_pushf(&env, "GIT_PUSH_CERT_NONCE_SLOP=%ld", + nonce_stamp_slop); + } + proc->env = env.argv; + } +} + typedef int (*feed_fn)(void *, const char **, size_t *); static int run_and_feed_hook(const char *hook_name, feed_fn feed, void *feed_state) { @@ -271,6 +521,8 @@ static int run_and_feed_hook(const char *hook_name, feed_fn feed, void *feed_sta proc.in = -1; proc.stdout_to_stderr = 1; + prepare_push_cert_sha1(&proc); + if (use_sideband) { memset(&muxer, 0, sizeof(muxer)); muxer.proc = copy_to_sideband; @@ -841,40 +1093,79 @@ static void execute_commands(struct command *commands, "the reported refs above"); } +static struct command **queue_command(struct command **tail, + const char *line, + int linelen) +{ + unsigned char old_sha1[20], new_sha1[20]; + struct command *cmd; + const char *refname; + int reflen; + + if (linelen < 83 || + line[40] != ' ' || + line[81] != ' ' || + get_sha1_hex(line, old_sha1) || + get_sha1_hex(line + 41, new_sha1)) + die("protocol error: expected old/new/ref, got '%s'", line); + + refname = line + 82; + reflen = linelen - 82; + cmd = xcalloc(1, sizeof(struct command) + reflen + 1); + hashcpy(cmd->old_sha1, old_sha1); + hashcpy(cmd->new_sha1, new_sha1); + memcpy(cmd->ref_name, refname, reflen); + cmd->ref_name[reflen] = '\0'; + *tail = cmd; + return &cmd->next; +} + +static void queue_commands_from_cert(struct command **tail, + struct strbuf *push_cert) +{ + const char *boc, *eoc; + + if (*tail) + die("protocol error: got both push certificate and unsigned commands"); + + boc = strstr(push_cert->buf, "\n\n"); + if (!boc) + die("malformed push certificate %.*s", 100, push_cert->buf); + else + boc += 2; + eoc = push_cert->buf + parse_signature(push_cert->buf, push_cert->len); + + while (boc < eoc) { + const char *eol = memchr(boc, '\n', eoc - boc); + tail = queue_command(tail, boc, eol ? eol - boc : eoc - eol); + boc = eol ? eol + 1 : eoc; + } +} + static struct command *read_head_info(struct sha1_array *shallow) { struct command *commands = NULL; struct command **p = &commands; for (;;) { char *line; - unsigned char old_sha1[20], new_sha1[20]; - struct command *cmd; - char *refname; - int len, reflen; + int len, linelen; line = packet_read_line(0, &len); if (!line) break; if (len == 48 && starts_with(line, "shallow ")) { - if (get_sha1_hex(line + 8, old_sha1)) - die("protocol error: expected shallow sha, got '%s'", line + 8); - sha1_array_append(shallow, old_sha1); + unsigned char sha1[20]; + if (get_sha1_hex(line + 8, sha1)) + die("protocol error: expected shallow sha, got '%s'", + line + 8); + sha1_array_append(shallow, sha1); continue; } - if (len < 83 || - line[40] != ' ' || - line[81] != ' ' || - get_sha1_hex(line, old_sha1) || - get_sha1_hex(line + 41, new_sha1)) - die("protocol error: expected old/new/ref, got '%s'", - line); - - refname = line + 82; - reflen = strlen(refname); - if (reflen + 82 < len) { - const char *feature_list = refname + reflen + 1; + linelen = strlen(line); + if (linelen < len) { + const char *feature_list = line + linelen + 1; if (parse_feature_request(feature_list, "report-status")) report_status = 1; if (parse_feature_request(feature_list, "side-band-64k")) @@ -882,13 +1173,34 @@ static struct command *read_head_info(struct sha1_array *shallow) if (parse_feature_request(feature_list, "quiet")) quiet = 1; } - cmd = xcalloc(1, sizeof(struct command) + len - 80); - hashcpy(cmd->old_sha1, old_sha1); - hashcpy(cmd->new_sha1, new_sha1); - memcpy(cmd->ref_name, line + 82, len - 81); - *p = cmd; - p = &cmd->next; + + if (!strcmp(line, "push-cert")) { + int true_flush = 0; + char certbuf[1024]; + + for (;;) { + len = packet_read(0, NULL, NULL, + certbuf, sizeof(certbuf), 0); + if (!len) { + true_flush = 1; + break; + } + if (!strcmp(certbuf, "push-cert-end\n")) + break; /* end of cert */ + strbuf_addstr(&push_cert, certbuf); + } + + if (true_flush) + break; + continue; + } + + p = queue_command(p, line, linelen); } + + if (push_cert.len) + queue_commands_from_cert(p, &push_cert); + return commands; } @@ -1129,9 +1441,7 @@ static int delete_only(struct command *commands) int cmd_receive_pack(int argc, const char **argv, const char *prefix) { int advertise_refs = 0; - int stateless_rpc = 0; int i; - const char *dir = NULL; struct command *commands; struct sha1_array shallow = SHA1_ARRAY_INIT; struct sha1_array ref = SHA1_ARRAY_INIT; @@ -1164,19 +1474,21 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix) usage(receive_pack_usage); } - if (dir) + if (service_dir) usage(receive_pack_usage); - dir = arg; + service_dir = arg; } - if (!dir) + if (!service_dir) usage(receive_pack_usage); setup_path(); - if (!enter_repo(dir, 0)) - die("'%s' does not appear to be a git repository", dir); + if (!enter_repo(service_dir, 0)) + die("'%s' does not appear to be a git repository", service_dir); git_config(receive_pack_config, NULL); + if (cert_nonce_seed) + push_cert_nonce = prepare_push_cert_nonce(service_dir, time(NULL)); if (0 <= transfer_unpack_limit) unpack_limit = transfer_unpack_limit; @@ -1221,5 +1533,6 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix) packet_flush(1); sha1_array_clear(&shallow); sha1_array_clear(&ref); + free((void *)push_cert_nonce); return 0; } diff --git a/builtin/send-pack.c b/builtin/send-pack.c index 4b1bc0fef..b564a7784 100644 --- a/builtin/send-pack.c +++ b/builtin/send-pack.c @@ -154,6 +154,10 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix) args.verbose = 1; continue; } + if (!strcmp(arg, "--signed")) { + args.push_cert = 1; + continue; + } if (!strcmp(arg, "--progress")) { progress = 1; continue; @@ -1214,42 +1214,6 @@ free_return: free(buf); } -static struct { - char result; - const char *check; -} sigcheck_gpg_status[] = { - { 'G', "\n[GNUPG:] GOODSIG " }, - { 'B', "\n[GNUPG:] BADSIG " }, - { 'U', "\n[GNUPG:] TRUST_NEVER" }, - { 'U', "\n[GNUPG:] TRUST_UNDEFINED" }, -}; - -static void parse_gpg_output(struct signature_check *sigc) -{ - const char *buf = sigc->gpg_status; - int i; - - /* Iterate over all search strings */ - for (i = 0; i < ARRAY_SIZE(sigcheck_gpg_status); i++) { - const char *found, *next; - - if (!skip_prefix(buf, sigcheck_gpg_status[i].check + 1, &found)) { - found = strstr(buf, sigcheck_gpg_status[i].check); - if (!found) - continue; - found += strlen(sigcheck_gpg_status[i].check); - } - sigc->result = sigcheck_gpg_status[i].result; - /* The trust messages are not followed by key/signer information */ - if (sigc->result != 'U') { - sigc->key = xmemdupz(found, 16); - found += 17; - next = strchrnul(found, '\n'); - sigc->signer = xmemdupz(found, next - found); - } - } -} - void check_commit_signature(const struct commit *commit, struct signature_check *sigc) { struct strbuf payload = STRBUF_INIT; diff --git a/gpg-interface.c b/gpg-interface.c index 1ef73fb7d..68b0c814f 100644 --- a/gpg-interface.c +++ b/gpg-interface.c @@ -7,6 +7,9 @@ static char *configured_signing_key; static const char *gpg_program = "gpg"; +#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----" +#define PGP_MESSAGE "-----BEGIN PGP MESSAGE-----" + void signature_check_clear(struct signature_check *sigc) { free(sigc->payload); @@ -21,6 +24,60 @@ void signature_check_clear(struct signature_check *sigc) sigc->key = NULL; } +static struct { + char result; + const char *check; +} sigcheck_gpg_status[] = { + { 'G', "\n[GNUPG:] GOODSIG " }, + { 'B', "\n[GNUPG:] BADSIG " }, + { 'U', "\n[GNUPG:] TRUST_NEVER" }, + { 'U', "\n[GNUPG:] TRUST_UNDEFINED" }, +}; + +void parse_gpg_output(struct signature_check *sigc) +{ + const char *buf = sigc->gpg_status; + int i; + + /* Iterate over all search strings */ + for (i = 0; i < ARRAY_SIZE(sigcheck_gpg_status); i++) { + const char *found, *next; + + if (!skip_prefix(buf, sigcheck_gpg_status[i].check + 1, &found)) { + found = strstr(buf, sigcheck_gpg_status[i].check); + if (!found) + continue; + found += strlen(sigcheck_gpg_status[i].check); + } + sigc->result = sigcheck_gpg_status[i].result; + /* The trust messages are not followed by key/signer information */ + if (sigc->result != 'U') { + sigc->key = xmemdupz(found, 16); + found += 17; + next = strchrnul(found, '\n'); + sigc->signer = xmemdupz(found, next - found); + } + } +} + +/* + * Look at GPG signed content (e.g. a signed tag object), whose + * payload is followed by a detached signature on it. Return the + * offset where the embedded detached signature begins, or the end of + * the data when there is no such signature. + */ +size_t parse_signature(const char *buf, unsigned long size) +{ + char *eol; + size_t len = 0; + while (len < size && !starts_with(buf + len, PGP_SIGNATURE) && + !starts_with(buf + len, PGP_MESSAGE)) { + eol = memchr(buf + len, '\n', size - len); + len += eol ? eol - (buf + len) + 1 : size - len; + } + return len; +} + void set_signing_key(const char *key) { free(configured_signing_key); diff --git a/gpg-interface.h b/gpg-interface.h index 37c23daff..87a4f2e3f 100644 --- a/gpg-interface.h +++ b/gpg-interface.h @@ -5,16 +5,23 @@ struct signature_check { char *payload; char *gpg_output; char *gpg_status; - char result; /* 0 (not checked), - * N (checked but no further result), - * U (untrusted good), - * G (good) - * B (bad) */ + + /* + * possible "result": + * 0 (not checked) + * N (checked but no further result) + * U (untrusted good) + * G (good) + * B (bad) + */ + char result; char *signer; char *key; }; extern void signature_check_clear(struct signature_check *sigc); +extern size_t parse_signature(const char *buf, unsigned long size); +extern void parse_gpg_output(struct signature_check *); extern int sign_buffer(struct strbuf *buffer, struct strbuf *signature, const char *signing_key); extern int verify_signed_buffer(const char *payload, size_t payload_size, const char *signature, size_t signature_size, struct strbuf *gpg_output, struct strbuf *gpg_status); extern int git_gpg_config(const char *, const char *, void *); diff --git a/remote-curl.c b/remote-curl.c index cd626d15e..dd63bc27a 100644 --- a/remote-curl.c +++ b/remote-curl.c @@ -25,7 +25,8 @@ struct options { update_shallow : 1, followtags : 1, dry_run : 1, - thin : 1; + thin : 1, + push_cert : 1; }; static struct options options; static struct string_list cas_options = STRING_LIST_INIT_DUP; @@ -106,6 +107,14 @@ static int set_option(const char *name, const char *value) else return -1; return 0; + } else if (!strcmp(name, "pushcert")) { + if (!strcmp(value, "true")) + options.push_cert = 1; + else if (!strcmp(value, "false")) + options.push_cert = 0; + else + return -1; + return 0; } else { return 1 /* unsupported */; } @@ -872,6 +881,8 @@ 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.verbosity == 0) argv_array_push(&args, "--quiet"); else if (options.verbosity > 1) diff --git a/send-pack.c b/send-pack.c index 8b4cbf049..949cb61aa 100644 --- a/send-pack.c +++ b/send-pack.c @@ -11,6 +11,7 @@ #include "transport.h" #include "version.h" #include "sha1-array.h" +#include "gpg-interface.h" static int feed_object(const unsigned char *sha1, int fd, int negative) { @@ -189,6 +190,94 @@ static void advertise_shallow_grafts_buf(struct strbuf *sb) for_each_commit_graft(advertise_shallow_grafts_cb, sb); } +static int ref_update_to_be_sent(const struct ref *ref, const struct send_pack_args *args) +{ + if (!ref->peer_ref && !args->send_mirror) + return 0; + + /* Check for statuses set by set_ref_status_for_push() */ + switch (ref->status) { + case REF_STATUS_REJECT_NONFASTFORWARD: + case REF_STATUS_REJECT_ALREADY_EXISTS: + case REF_STATUS_REJECT_FETCH_FIRST: + case REF_STATUS_REJECT_NEEDS_FORCE: + case REF_STATUS_REJECT_STALE: + case REF_STATUS_REJECT_NODELETE: + case REF_STATUS_UPTODATE: + return 0; + default: + return 1; + } +} + +/* + * the beginning of the next line, or the end of buffer. + * + * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and + * convert many similar uses found by "git grep -A4 memchr". + */ +static const char *next_line(const char *line, size_t len) +{ + const char *nl = memchr(line, '\n', len); + if (!nl) + return line + len; /* incomplete line */ + return nl + 1; +} + +static int generate_push_cert(struct strbuf *req_buf, + const struct ref *remote_refs, + struct send_pack_args *args, + const char *cap_string, + const char *push_cert_nonce) +{ + const struct ref *ref; + char *signing_key = xstrdup(get_signing_key()); + const char *cp, *np; + struct strbuf cert = STRBUF_INIT; + int update_seen = 0; + + strbuf_addf(&cert, "certificate version 0.1\n"); + strbuf_addf(&cert, "pusher %s ", signing_key); + datestamp(&cert); + strbuf_addch(&cert, '\n'); + if (args->url && *args->url) { + char *anon_url = transport_anonymize_url(args->url); + strbuf_addf(&cert, "pushee %s\n", anon_url); + free(anon_url); + } + if (push_cert_nonce[0]) + strbuf_addf(&cert, "nonce %s\n", push_cert_nonce); + strbuf_addstr(&cert, "\n"); + + for (ref = remote_refs; ref; ref = ref->next) { + if (!ref_update_to_be_sent(ref, args)) + continue; + update_seen = 1; + strbuf_addf(&cert, "%s %s %s\n", + sha1_to_hex(ref->old_sha1), + sha1_to_hex(ref->new_sha1), + ref->name); + } + if (!update_seen) + goto free_return; + + if (sign_buffer(&cert, &cert, signing_key)) + die(_("failed to sign the push certificate")); + + packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string); + for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) { + np = next_line(cp, cert.buf + cert.len - cp); + packet_buf_write(req_buf, + "%.*s", (int)(np - cp), cp); + } + packet_buf_write(req_buf, "push-cert-end\n"); + +free_return: + free(signing_key); + strbuf_release(&cert); + return update_seen; +} + int send_pack(struct send_pack_args *args, int fd[], struct child_process *conn, struct ref *remote_refs, @@ -197,8 +286,9 @@ int send_pack(struct send_pack_args *args, int in = fd[0]; int out = fd[1]; struct strbuf req_buf = STRBUF_INIT; + struct strbuf cap_buf = STRBUF_INIT; struct ref *ref; - int new_refs; + int need_pack_data = 0; int allow_deleting_refs = 0; int status_report = 0; int use_sideband = 0; @@ -207,6 +297,7 @@ int send_pack(struct send_pack_args *args, unsigned cmds_sent = 0; int ret; struct async demux; + const char *push_cert_nonce = NULL; /* Does the other end support the reporting? */ if (server_supports("report-status")) @@ -223,6 +314,14 @@ int send_pack(struct send_pack_args *args, agent_supported = 1; if (server_supports("no-thin")) args->use_thin_pack = 0; + if (args->push_cert) { + int len; + + push_cert_nonce = server_feature_value("push-cert", &len); + if (!push_cert_nonce) + die(_("the receiving end does not support --signed push")); + push_cert_nonce = xmemdupz(push_cert_nonce, len); + } if (!remote_refs) { fprintf(stderr, "No refs in common and none specified; doing nothing.\n" @@ -230,64 +329,71 @@ int send_pack(struct send_pack_args *args, return 0; } + if (status_report) + strbuf_addstr(&cap_buf, " report-status"); + if (use_sideband) + strbuf_addstr(&cap_buf, " side-band-64k"); + if (quiet_supported && (args->quiet || !args->progress)) + strbuf_addstr(&cap_buf, " quiet"); + if (agent_supported) + strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized()); + + /* + * NEEDSWORK: why does delete-refs have to be so specific to + * send-pack machinery that set_ref_status_for_push() cannot + * set this bit for us??? + */ + for (ref = remote_refs; ref; ref = ref->next) + if (ref->deletion && !allow_deleting_refs) + ref->status = REF_STATUS_REJECT_NODELETE; + if (!args->dry_run) advertise_shallow_grafts_buf(&req_buf); + if (!args->dry_run && args->push_cert) + cmds_sent = generate_push_cert(&req_buf, remote_refs, args, + cap_buf.buf, push_cert_nonce); + /* - * Finally, tell the other end! + * Clear the status for each ref and see if we need to send + * the pack data. */ - new_refs = 0; for (ref = remote_refs; ref; ref = ref->next) { - if (!ref->peer_ref && !args->send_mirror) + if (!ref_update_to_be_sent(ref, args)) continue; - /* Check for statuses set by set_ref_status_for_push() */ - switch (ref->status) { - case REF_STATUS_REJECT_NONFASTFORWARD: - case REF_STATUS_REJECT_ALREADY_EXISTS: - case REF_STATUS_REJECT_FETCH_FIRST: - case REF_STATUS_REJECT_NEEDS_FORCE: - case REF_STATUS_REJECT_STALE: - case REF_STATUS_UPTODATE: - continue; - default: - ; /* do nothing */ - } + if (!ref->deletion) + need_pack_data = 1; - if (ref->deletion && !allow_deleting_refs) { - ref->status = REF_STATUS_REJECT_NODELETE; + if (args->dry_run || !status_report) + ref->status = REF_STATUS_OK; + else + ref->status = REF_STATUS_EXPECTING_REPORT; + } + + /* + * Finally, tell the other end! + */ + for (ref = remote_refs; ref; ref = ref->next) { + char *old_hex, *new_hex; + + if (args->dry_run || args->push_cert) continue; - } - if (!ref->deletion) - new_refs++; + if (!ref_update_to_be_sent(ref, args)) + continue; - if (args->dry_run) { - ref->status = REF_STATUS_OK; + old_hex = sha1_to_hex(ref->old_sha1); + new_hex = sha1_to_hex(ref->new_sha1); + if (!cmds_sent) { + packet_buf_write(&req_buf, + "%s %s %s%c%s", + old_hex, new_hex, ref->name, 0, + cap_buf.buf); + cmds_sent = 1; } else { - char *old_hex = sha1_to_hex(ref->old_sha1); - char *new_hex = sha1_to_hex(ref->new_sha1); - int quiet = quiet_supported && (args->quiet || !args->progress); - - if (!cmds_sent && (status_report || use_sideband || - quiet || agent_supported)) { - packet_buf_write(&req_buf, - "%s %s %s%c%s%s%s%s%s", - old_hex, new_hex, ref->name, 0, - status_report ? " report-status" : "", - use_sideband ? " side-band-64k" : "", - quiet ? " quiet" : "", - agent_supported ? " agent=" : "", - agent_supported ? git_user_agent_sanitized() : "" - ); - } - else - packet_buf_write(&req_buf, "%s %s %s", - old_hex, new_hex, ref->name); - ref->status = status_report ? - REF_STATUS_EXPECTING_REPORT : - REF_STATUS_OK; - cmds_sent++; + packet_buf_write(&req_buf, "%s %s %s", + old_hex, new_hex, ref->name); } } @@ -301,6 +407,7 @@ int send_pack(struct send_pack_args *args, packet_flush(out); } strbuf_release(&req_buf); + strbuf_release(&cap_buf); if (use_sideband && cmds_sent) { memset(&demux, 0, sizeof(demux)); @@ -312,7 +419,7 @@ int send_pack(struct send_pack_args *args, in = demux.out; } - if (new_refs && cmds_sent) { + if (need_pack_data && cmds_sent) { if (pack_objects(out, remote_refs, extra_have, args) < 0) { for (ref = remote_refs; ref; ref = ref->next) ref->status = REF_STATUS_NONE; diff --git a/send-pack.h b/send-pack.h index 8e843924c..563545774 100644 --- a/send-pack.h +++ b/send-pack.h @@ -2,6 +2,7 @@ #define SEND_PACK_H struct send_pack_args { + const char *url; unsigned verbose:1, quiet:1, porcelain:1, @@ -11,6 +12,7 @@ struct send_pack_args { use_thin_pack:1, use_ofs_delta:1, dry_run:1, + push_cert:1, stateless_rpc:1; }; diff --git a/t/lib-httpd/apache.conf b/t/lib-httpd/apache.conf index b384d7993..7713dd260 100644 --- a/t/lib-httpd/apache.conf +++ b/t/lib-httpd/apache.conf @@ -68,6 +68,7 @@ LockFile accept.lock PassEnv GIT_VALGRIND PassEnv GIT_VALGRIND_OPTIONS +PassEnv GNUPGHOME Alias /dumb/ www/ Alias /auth/dumb/ www/auth/dumb/ diff --git a/t/t5534-push-signed.sh b/t/t5534-push-signed.sh new file mode 100755 index 000000000..2786346f9 --- /dev/null +++ b/t/t5534-push-signed.sh @@ -0,0 +1,127 @@ +#!/bin/sh + +test_description='signed push' + +. ./test-lib.sh +. "$TEST_DIRECTORY"/lib-gpg.sh + +prepare_dst () { + rm -fr dst && + test_create_repo dst && + + git push dst master:noop master:ff master:noff +} + +test_expect_success setup ' + # master, ff and noff branches pointing at the same commit + test_tick && + git commit --allow-empty -m initial && + + git checkout -b noop && + git checkout -b ff && + git checkout -b noff && + + # noop stays the same, ff advances, noff rewrites + test_tick && + git commit --allow-empty --amend -m rewritten && + git checkout ff && + + test_tick && + git commit --allow-empty -m second +' + +test_expect_success 'unsigned push does not send push certificate' ' + prepare_dst && + mkdir -p dst/.git/hooks && + write_script dst/.git/hooks/post-receive <<-\EOF && + # discard the update list + cat >/dev/null + # record the push certificate + if test -n "${GIT_PUSH_CERT-}" + then + git cat-file blob $GIT_PUSH_CERT >../push-cert + fi + EOF + + git push dst noop ff +noff && + ! test -f dst/push-cert +' + +test_expect_success 'talking with a receiver without push certificate support' ' + prepare_dst && + mkdir -p dst/.git/hooks && + write_script dst/.git/hooks/post-receive <<-\EOF && + # discard the update list + cat >/dev/null + # record the push certificate + if test -n "${GIT_PUSH_CERT-}" + then + git cat-file blob $GIT_PUSH_CERT >../push-cert + fi + EOF + + git push dst noop ff +noff && + ! test -f dst/push-cert +' + +test_expect_success 'push --signed fails with a receiver without push certificate support' ' + prepare_dst && + mkdir -p dst/.git/hooks && + test_must_fail git push --signed dst noop ff +noff 2>err && + test_i18ngrep "the receiving end does not support" err +' + +test_expect_success GPG 'no certificate for a signed push with no update' ' + prepare_dst && + mkdir -p dst/.git/hooks && + write_script dst/.git/hooks/post-receive <<-\EOF && + if test -n "${GIT_PUSH_CERT-}" + then + git cat-file blob $GIT_PUSH_CERT >../push-cert + fi + EOF + git push dst noop && + ! test -f dst/push-cert +' + +test_expect_success GPG 'signed push sends push certificate' ' + prepare_dst && + mkdir -p dst/.git/hooks && + git -C dst config receive.certnonceseed sekrit && + write_script dst/.git/hooks/post-receive <<-\EOF && + # discard the update list + cat >/dev/null + # record the push certificate + if test -n "${GIT_PUSH_CERT-}" + then + git cat-file blob $GIT_PUSH_CERT >../push-cert + fi && + + cat >../push-cert-status <<E_O_F + SIGNER=${GIT_PUSH_CERT_SIGNER-nobody} + KEY=${GIT_PUSH_CERT_KEY-nokey} + STATUS=${GIT_PUSH_CERT_STATUS-nostatus} + NONCE_STATUS=${GIT_PUSH_CERT_NONCE_STATUS-nononcestatus} + NONCE=${GIT_PUSH_CERT_NONCE-nononce} + E_O_F + + EOF + + git push --signed dst noop ff +noff && + + ( + cat <<-\EOF && + SIGNER=C O Mitter <committer@example.com> + KEY=13B6F51ECDDE430D + STATUS=G + NONCE_STATUS=OK + EOF + sed -n -e "s/^nonce /NONCE=/p" -e "/^$/q" dst/push-cert + ) >expect && + + grep "$(git rev-parse noop ff) refs/heads/ff" dst/push-cert && + grep "$(git rev-parse noop noff) refs/heads/noff" dst/push-cert && + test_cmp expect dst/push-cert-status +' + +test_done diff --git a/t/t5541-http-push-smart.sh b/t/t5541-http-push-smart.sh index db1998873..d2c681ebf 100755 --- a/t/t5541-http-push-smart.sh +++ b/t/t5541-http-push-smart.sh @@ -12,6 +12,7 @@ if test -n "$NO_CURL"; then fi ROOT_PATH="$PWD" +. "$TEST_DIRECTORY"/lib-gpg.sh . "$TEST_DIRECTORY"/lib-httpd.sh . "$TEST_DIRECTORY"/lib-terminal.sh start_httpd @@ -338,5 +339,45 @@ test_expect_success CMDLINE_LIMIT 'push 2000 tags over http' ' run_with_limited_cmdline git push --mirror ' +test_expect_success GPG 'push with post-receive to inspect certificate' ' + ( + cd "$HTTPD_DOCUMENT_ROOT_PATH"/test_repo.git && + mkdir -p hooks && + write_script hooks/post-receive <<-\EOF && + # discard the update list + cat >/dev/null + # record the push certificate + if test -n "${GIT_PUSH_CERT-}" + then + git cat-file blob $GIT_PUSH_CERT >../push-cert + fi && + cat >../push-cert-status <<E_O_F + SIGNER=${GIT_PUSH_CERT_SIGNER-nobody} + KEY=${GIT_PUSH_CERT_KEY-nokey} + STATUS=${GIT_PUSH_CERT_STATUS-nostatus} + NONCE_STATUS=${GIT_PUSH_CERT_NONCE_STATUS-nononcestatus} + NONCE=${GIT_PUSH_CERT_NONCE-nononce} + E_O_F + EOF + + git config receive.certnonceseed sekrit && + git config receive.certnonceslop 30 + ) && + cd "$ROOT_PATH/test_repo_clone" && + test_commit cert-test && + git push --signed "$HTTPD_URL/smart/test_repo.git" && + ( + cd "$HTTPD_DOCUMENT_ROOT_PATH" && + cat <<-\EOF && + SIGNER=C O Mitter <committer@example.com> + KEY=13B6F51ECDDE430D + STATUS=G + NONCE_STATUS=OK + EOF + sed -n -e "s/^nonce /NONCE=/p" -e "/^$/q" push-cert + ) >expect && + test_cmp expect "$HTTPD_DOCUMENT_ROOT_PATH/push-cert-status" +' + stop_httpd test_done diff --git a/t/test-lib.sh b/t/test-lib.sh index 82095e34e..0f4a67bfc 100644 --- a/t/test-lib.sh +++ b/t/test-lib.sh @@ -813,7 +813,8 @@ rm -fr "$TRASH_DIRECTORY" || { } HOME="$TRASH_DIRECTORY" -export HOME +GNUPGHOME="$HOME/gnupg-home-not-used" +export HOME GNUPGHOME if test -z "$TEST_NO_CREATE_REPO" then @@ -4,9 +4,6 @@ #include "tree.h" #include "blob.h" -#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----" -#define PGP_MESSAGE "-----BEGIN PGP MESSAGE-----" - const char *tag_type = "tag"; struct object *deref_tag(struct object *o, const char *warn, int warnlen) @@ -143,20 +140,3 @@ int parse_tag(struct tag *item) free(data); return ret; } - -/* - * Look at a signed tag object, and return the offset where - * the embedded detached signature begins, or the end of the - * data when there is no such signature. - */ -size_t parse_signature(const char *buf, unsigned long size) -{ - char *eol; - size_t len = 0; - while (len < size && !starts_with(buf + len, PGP_SIGNATURE) && - !starts_with(buf + len, PGP_MESSAGE)) { - eol = memchr(buf + len, '\n', size - len); - len += eol ? eol - (buf + len) + 1 : size - len; - } - return len; -} @@ -17,6 +17,5 @@ extern int parse_tag_buffer(struct tag *item, const void *data, unsigned long si extern int parse_tag(struct tag *item); extern struct object *deref_tag(struct object *, const char *, int); extern struct object *deref_tag_noverify(struct object *); -extern size_t parse_signature(const char *buf, unsigned long size); #endif /* TAG_H */ diff --git a/transport-helper.c b/transport-helper.c index 080a7a6ae..2b24d51a2 100644 --- a/transport-helper.c +++ b/transport-helper.c @@ -260,7 +260,8 @@ static const char *unsupported_options[] = { static const char *boolean_options[] = { TRANS_OPT_THIN, TRANS_OPT_KEEP, - TRANS_OPT_FOLLOWTAGS + TRANS_OPT_FOLLOWTAGS, + TRANS_OPT_PUSH_CERT }; static int set_helper_option(struct transport *transport, @@ -836,6 +837,9 @@ static int push_refs_with_push(struct transport *transport, 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); } strbuf_addch(&buf, '\n'); @@ -860,6 +864,9 @@ static int push_refs_with_export(struct transport *transport, 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 dry-run", data->name); } if (flags & TRANSPORT_PUSH_FORCE) { diff --git a/transport.c b/transport.c index 7388bb87d..055d2a27d 100644 --- a/transport.c +++ b/transport.c @@ -477,6 +477,9 @@ static int set_git_option(struct git_transport_options *opts, die("transport: invalid depth option '%s'", value); } return 0; + } else if (!strcmp(name, TRANS_OPT_PUSH_CERT)) { + opts->push_cert = !!value; + return 0; } return 1; } @@ -820,6 +823,8 @@ 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.url = transport->url; ret = send_pack(&args, data->fd, data->conn, remote_refs, &data->extra_have); diff --git a/transport.h b/transport.h index 02ea248db..3e0091eaa 100644 --- a/transport.h +++ b/transport.h @@ -12,6 +12,7 @@ struct git_transport_options { unsigned check_self_contained_and_connected : 1; unsigned self_contained_and_connected : 1; unsigned update_shallow : 1; + unsigned push_cert : 1; int depth; const char *uploadpack; const char *receivepack; @@ -123,6 +124,7 @@ 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_SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3) #define TRANSPORT_SUMMARY(x) (int)(TRANSPORT_SUMMARY_WIDTH + strlen(x) - gettext_width(x)), (x) @@ -156,6 +158,9 @@ struct transport *transport_get(struct remote *, const char *); /* Accept refs that may update .git/shallow without --depth */ #define TRANS_OPT_UPDATE_SHALLOW "updateshallow" +/* Send push certificates */ +#define TRANS_OPT_PUSH_CERT "pushcert" + /** * Returns 0 if the option was used, non-zero otherwise. Prints a * message to stderr if the option is not used. |