diff options
| -rwxr-xr-x | t/t0210-trace2-normal.sh | 20 | ||||
| -rw-r--r-- | trace2.c | 120 |
2 files changed, 136 insertions, 4 deletions
diff --git a/t/t0210-trace2-normal.sh b/t/t0210-trace2-normal.sh index 80e76a4695..c312657a12 100755 --- a/t/t0210-trace2-normal.sh +++ b/t/t0210-trace2-normal.sh @@ -2,7 +2,7 @@ test_description='test trace2 facility (normal target)' -TEST_PASSES_SANITIZE_LEAK=true +TEST_PASSES_SANITIZE_LEAK=false . ./test-lib.sh # Turn off any inherited trace2 settings for this test. @@ -283,4 +283,22 @@ test_expect_success 'using global config with include' ' test_cmp expect actual ' +test_expect_success 'unsafe URLs are redacted by default' ' + test_when_finished \ + "rm -r trace.normal unredacted.normal clone clone2" && + + test_config_global \ + "url.$(pwd).insteadOf" https://user:pwd@example.com/ && + test_config_global trace2.configParams "core.*,remote.*.url" && + + GIT_TRACE2="$(pwd)/trace.normal" \ + git clone https://user:pwd@example.com/ clone && + ! grep user:pwd trace.normal && + + GIT_TRACE2_REDACT=0 GIT_TRACE2="$(pwd)/unredacted.normal" \ + git clone https://user:pwd@example.com/ clone2 && + grep "start .* clone https://user:pwd@example.com" unredacted.normal && + grep "remote.origin.url=https://user:pwd@example.com" unredacted.normal +' + test_done @@ -20,6 +20,7 @@ #include "trace2/tr2_tmr.h" static int trace2_enabled; +static int trace2_redact = 1; static int tr2_next_child_id; /* modify under lock */ static int tr2_next_exec_id; /* modify under lock */ @@ -227,6 +228,8 @@ void trace2_initialize_fl(const char *file, int line) if (!tr2_tgt_want_builtins()) return; trace2_enabled = 1; + if (!git_env_bool("GIT_TRACE2_REDACT", 1)) + trace2_redact = 0; tr2_sid_get(); @@ -247,12 +250,93 @@ int trace2_is_enabled(void) return trace2_enabled; } +/* + * Redacts an argument, i.e. ensures that no password in + * https://user:password@host/-style URLs is logged. + * + * Returns the original if nothing needed to be redacted. + * Returns a pointer that needs to be `free()`d otherwise. + */ +static const char *redact_arg(const char *arg) +{ + const char *p, *colon; + size_t at; + + if (!trace2_redact || + (!skip_prefix(arg, "https://", &p) && + !skip_prefix(arg, "http://", &p))) + return arg; + + at = strcspn(p, "@/"); + if (p[at] != '@') + return arg; + + colon = memchr(p, ':', at); + if (!colon) + return arg; + + return xstrfmt("%.*s:<REDACTED>%s", (int)(colon - arg), arg, p + at); +} + +/* + * Redacts arguments in an argument list. + * + * Returns the original if nothing needed to be redacted. + * Otherwise, returns a new array that needs to be released + * via `free_redacted_argv()`. + */ +static const char **redact_argv(const char **argv) +{ + int i, j; + const char *redacted = NULL; + const char **ret; + + if (!trace2_redact) + return argv; + + for (i = 0; argv[i]; i++) + if ((redacted = redact_arg(argv[i])) != argv[i]) + break; + + if (!argv[i]) + return argv; + + for (j = 0; argv[j]; j++) + ; /* keep counting */ + + ALLOC_ARRAY(ret, j + 1); + ret[j] = NULL; + + for (j = 0; j < i; j++) + ret[j] = argv[j]; + ret[i] = redacted; + for (++i; argv[i]; i++) { + redacted = redact_arg(argv[i]); + ret[i] = redacted ? redacted : argv[i]; + } + + return ret; +} + +static void free_redacted_argv(const char **redacted, const char **argv) +{ + int i; + + if (redacted != argv) { + for (i = 0; argv[i]; i++) + if (redacted[i] != argv[i]) + free((void *)redacted[i]); + free((void *)redacted); + } +} + void trace2_cmd_start_fl(const char *file, int line, const char **argv) { struct tr2_tgt *tgt_j; int j; uint64_t us_now; uint64_t us_elapsed_absolute; + const char **redacted; if (!trace2_enabled) return; @@ -260,10 +344,14 @@ void trace2_cmd_start_fl(const char *file, int line, const char **argv) us_now = getnanotime() / 1000; us_elapsed_absolute = tr2tls_absolute_elapsed(us_now); + redacted = redact_argv(argv); + for_each_wanted_builtin (j, tgt_j) if (tgt_j->pfn_start_fl) tgt_j->pfn_start_fl(file, line, us_elapsed_absolute, - argv); + redacted); + + free_redacted_argv(redacted, argv); } void trace2_cmd_exit_fl(const char *file, int line, int code) @@ -409,6 +497,7 @@ void trace2_child_start_fl(const char *file, int line, int j; uint64_t us_now; uint64_t us_elapsed_absolute; + const char **orig_argv = cmd->args.v; if (!trace2_enabled) return; @@ -419,10 +508,24 @@ void trace2_child_start_fl(const char *file, int line, cmd->trace2_child_id = tr2tls_locked_increment(&tr2_next_child_id); cmd->trace2_child_us_start = us_now; + /* + * The `pfn_child_start_fl` API takes a `struct child_process` + * rather than a simple `argv` for the child because some + * targets make use of the additional context bits/values. So + * temporarily replace the original argv (inside the `strvec`) + * with a possibly redacted version. + */ + cmd->args.v = redact_argv(orig_argv); + for_each_wanted_builtin (j, tgt_j) if (tgt_j->pfn_child_start_fl) tgt_j->pfn_child_start_fl(file, line, us_elapsed_absolute, cmd); + + if (cmd->args.v != orig_argv) { + free_redacted_argv(cmd->args.v, orig_argv); + cmd->args.v = orig_argv; + } } void trace2_child_exit_fl(const char *file, int line, struct child_process *cmd, @@ -493,6 +596,7 @@ int trace2_exec_fl(const char *file, int line, const char *exe, int exec_id; uint64_t us_now; uint64_t us_elapsed_absolute; + const char **redacted; if (!trace2_enabled) return -1; @@ -502,10 +606,14 @@ int trace2_exec_fl(const char *file, int line, const char *exe, exec_id = tr2tls_locked_increment(&tr2_next_exec_id); + redacted = redact_argv(argv); + for_each_wanted_builtin (j, tgt_j) if (tgt_j->pfn_exec_fl) tgt_j->pfn_exec_fl(file, line, us_elapsed_absolute, - exec_id, exe, argv); + exec_id, exe, redacted); + + free_redacted_argv(redacted, argv); return exec_id; } @@ -637,13 +745,19 @@ void trace2_def_param_fl(const char *file, int line, const char *param, { struct tr2_tgt *tgt_j; int j; + const char *redacted; if (!trace2_enabled) return; + redacted = redact_arg(value); + for_each_wanted_builtin (j, tgt_j) if (tgt_j->pfn_param_fl) - tgt_j->pfn_param_fl(file, line, param, value, kvi); + tgt_j->pfn_param_fl(file, line, param, redacted, kvi); + + if (redacted != value) + free((void *)redacted); } void trace2_def_repo_fl(const char *file, int line, struct repository *repo) |