This replaces "git-verify-tag.sh" with "builtin-verify-tag.c". Testing relies on the "git tag -v" tests calling this command. A temporary file is needed when calling to gpg, because git is already creating detached signatures (gpg option -b) to sign tags (instead of leaving gpg to add the signature to the file by itself), and those signatures need to be supplied in a separate file to be verified by gpg. The program uses git_mkstemp to create that temporary file needed by gpg, instead of the previously used "$GIT_DIR/.tmp-vtag", in order to allow the command to be used in read-only repositories, and also prevent other instances of git to read or remove the same file. Signal SIGPIPE is ignored because the program sometimes was terminated because that signal when writing the input for gpg. The command now can receive many tag names to be verified. Documentation is also updated here to reflect this new behaviour. Signed-off-by: Carlos Rica <jasampler@xxxxxxxxx> --- This resend is addressing the questions commented in: http://thread.gmane.org/gmane.comp.version-control.git/53376 Function verify_tag is designed to be easily reused in the upcoming "builtin-tag.c", although it is declared static now. Documentation/git-verify-tag.txt | 4 +- Makefile | 3 +- builtin-verify-tag.c | 111 ++++++++++++++++++++ builtin.h | 1 + .../examples/git-verify-tag.sh | 0 git.c | 1 + 6 files changed, 117 insertions(+), 3 deletions(-) create mode 100644 builtin-verify-tag.c rename git-verify-tag.sh => contrib/examples/git-verify-tag.sh (100%) diff --git a/Documentation/git-verify-tag.txt b/Documentation/git-verify-tag.txt index 48d17fd..ac7fb19 100644 --- a/Documentation/git-verify-tag.txt +++ b/Documentation/git-verify-tag.txt @@ -3,11 +3,11 @@ git-verify-tag(1) NAME ---- -git-verify-tag - Check the GPG signature of tag +git-verify-tag - Check the GPG signature of tags SYNOPSIS -------- -'git-verify-tag' <tag> +'git-verify-tag' <tag>... DESCRIPTION ----------- diff --git a/Makefile b/Makefile index 73b487f..c6ed79f 100644 --- a/Makefile +++ b/Makefile @@ -206,7 +206,7 @@ SCRIPT_SH = \ git-pull.sh git-rebase.sh git-rebase--interactive.sh \ git-repack.sh git-request-pull.sh git-reset.sh \ git-sh-setup.sh \ - git-tag.sh git-verify-tag.sh \ + git-tag.sh \ git-am.sh \ git-merge.sh git-merge-stupid.sh git-merge-octopus.sh \ git-merge-resolve.sh git-merge-ours.sh \ @@ -367,6 +367,7 @@ BUILTIN_OBJS = \ builtin-update-ref.o \ builtin-upload-archive.o \ builtin-verify-pack.o \ + builtin-verify-tag.o \ builtin-write-tree.o \ builtin-show-ref.o \ builtin-pack-refs.o diff --git a/builtin-verify-tag.c b/builtin-verify-tag.c new file mode 100644 index 0000000..11b971e --- /dev/null +++ b/builtin-verify-tag.c @@ -0,0 +1,111 @@ +/* + * Builtin "git verify-tag" + * + * Copyright (c) 2007 Carlos Rica <jasampler@xxxxxxxxx> + * + * Based on git-verify-tag.sh + */ +#include "cache.h" +#include "builtin.h" +#include "tag.h" +#include "run-command.h" +#include <signal.h> + +static const char builtin_verify_tag_usage[] = + "git-verify-tag [-v|--verbose] <tag>..."; + +#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----" + +static int run_gpg_verify(const char *buf, unsigned long size, int verbose) +{ + struct child_process gpg; + const char *args_gpg[] = {"gpg", "--verify", "FILE", "-", NULL}; + char path[PATH_MAX], *eol; + size_t len; + int fd, ret; + + fd = git_mkstemp(path, PATH_MAX, ".git_vtag_tmpXXXXXX"); + if (fd < 0) + return error("could not create temporary file '%s': %s", + path, strerror(errno)); + if (write_in_full(fd, buf, size) < 0) + return error("failed writing temporary file '%s': %s", + path, strerror(errno)); + close(fd); + + /* find the length without signature */ + len = 0; + while (len < size && prefixcmp(buf + len, PGP_SIGNATURE "\n")) { + eol = memchr(buf + len, '\n', size - len); + len += eol ? eol - (buf + len) + 1 : size - len; + } + if (verbose) + write_in_full(1, buf, len); + + memset(&gpg, 0, sizeof(gpg)); + gpg.argv = args_gpg; + gpg.in = -1; + gpg.out = 1; + args_gpg[2] = path; + if (start_command(&gpg)) + return error("could not run gpg."); + + write_in_full(gpg.in, buf, len); + close(gpg.in); + gpg.close_in = 0; + ret = finish_command(&gpg); + + unlink(path); + free(path); + + return ret; +} + +static int verify_tag(const char *name, int verbose) +{ + enum object_type type; + unsigned char sha1[20]; + char *buf; + unsigned long size; + int ret; + + if (get_sha1(name, sha1)) + return error("tag '%s' not found.", name); + + type = sha1_object_info(sha1, NULL); + if (type != OBJ_TAG) + return error("%s: cannot verify a non-tag object of type %s.", + name, typename(type)); + + buf = read_sha1_file(sha1, &type, &size); + if (!buf) + return error("%s: unable to read file.", name); + + ret = run_gpg_verify(buf, size, verbose); + + free(buf); + return ret; +} + +int cmd_verify_tag(int argc, const char **argv, const char *prefix) +{ + int i = 1, verbose = 0, had_error = 0; + + git_config(git_default_config); + + if (argc == 1) + usage(builtin_verify_tag_usage); + + if (!strcmp(argv[i], "-v") || !strcmp(argv[i], "--verbose")) { + verbose = 1; + i++; + } + + /* sometimes the program was terminated because this signal + * was received in the process of writing the gpg input: */ + signal(SIGPIPE, SIG_IGN); + while (i < argc) + if (verify_tag(argv[i++], verbose)) + had_error = 1; + return had_error; +} diff --git a/builtin.h b/builtin.h index 4cc228d..cb860a0 100644 --- a/builtin.h +++ b/builtin.h @@ -76,6 +76,7 @@ extern int cmd_update_index(int argc, const char **argv, const char *prefix); extern int cmd_update_ref(int argc, const char **argv, const char *prefix); extern int cmd_upload_archive(int argc, const char **argv, const char *prefix); extern int cmd_upload_tar(int argc, const char **argv, const char *prefix); +extern int cmd_verify_tag(int argc, const char **argv, const char *prefix); extern int cmd_version(int argc, const char **argv, const char *prefix); extern int cmd_whatchanged(int argc, const char **argv, const char *prefix); extern int cmd_write_tree(int argc, const char **argv, const char *prefix); diff --git a/git-verify-tag.sh b/contrib/examples/git-verify-tag.sh similarity index 100% rename from git-verify-tag.sh rename to contrib/examples/git-verify-tag.sh diff --git a/git.c b/git.c index a647f9c..1dfe120 100644 --- a/git.c +++ b/git.c @@ -368,6 +368,7 @@ static void handle_internal_command(int argc, const char **argv) { "update-index", cmd_update_index, RUN_SETUP }, { "update-ref", cmd_update_ref, RUN_SETUP }, { "upload-archive", cmd_upload_archive }, + { "verify-tag", cmd_verify_tag, RUN_SETUP }, { "version", cmd_version }, { "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER }, { "write-tree", cmd_write_tree, RUN_SETUP }, -- 1.5.0 - To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
