1 400c1baa 2022-10-13 thomas /*
  2 400c1baa 2022-10-13 thomas  * Copyright (c) 2020 Stefan Sperling <stsp@openbsd.org>
  3 400c1baa 2022-10-13 thomas  *
  4 400c1baa 2022-10-13 thomas  * Permission to use, copy, modify, and distribute this software for any
  5 400c1baa 2022-10-13 thomas  * purpose with or without fee is hereby granted, provided that the above
  6 400c1baa 2022-10-13 thomas  * copyright notice and this permission notice appear in all copies.
  7 400c1baa 2022-10-13 thomas  *
  8 400c1baa 2022-10-13 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 400c1baa 2022-10-13 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 400c1baa 2022-10-13 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 400c1baa 2022-10-13 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 400c1baa 2022-10-13 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 400c1baa 2022-10-13 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 400c1baa 2022-10-13 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 400c1baa 2022-10-13 thomas  */
 16 400c1baa 2022-10-13 thomas 
 17 400c1baa 2022-10-13 thomas #include <sys/types.h>
 18 400c1baa 2022-10-13 thomas #include <sys/queue.h>
 19 400c1baa 2022-10-13 thomas #include <sys/uio.h>
 20 400c1baa 2022-10-13 thomas #include <sys/socket.h>
 21 400c1baa 2022-10-13 thomas 
 22 400c1baa 2022-10-13 thomas #include <unistd.h>
 23 400c1baa 2022-10-13 thomas #include <fcntl.h>
 24 400c1baa 2022-10-13 thomas #include <errno.h>
 25 400c1baa 2022-10-13 thomas #include <stdlib.h>
 26 400c1baa 2022-10-13 thomas #include <stdio.h>
 27 400c1baa 2022-10-13 thomas #include <stdint.h>
 28 400c1baa 2022-10-13 thomas #include <imsg.h>
 29 400c1baa 2022-10-13 thomas #include <limits.h>
 30 400c1baa 2022-10-13 thomas 
 31 400c1baa 2022-10-13 thomas #include "got_error.h"
 32 400c1baa 2022-10-13 thomas #include "got_object.h"
 33 400c1baa 2022-10-13 thomas #include "got_repository.h"
 34 400c1baa 2022-10-13 thomas 
 35 400c1baa 2022-10-13 thomas #include "got_lib_delta.h"
 36 400c1baa 2022-10-13 thomas #include "got_lib_object.h"
 37 400c1baa 2022-10-13 thomas #include "got_lib_privsep.h"
 38 400c1baa 2022-10-13 thomas #include "got_lib_gotconfig.h"
 39 400c1baa 2022-10-13 thomas 
 40 400c1baa 2022-10-13 thomas #include "got_gotconfig.h"
 41 400c1baa 2022-10-13 thomas 
 42 400c1baa 2022-10-13 thomas const struct got_error *
 43 400c1baa 2022-10-13 thomas got_gotconfig_read(struct got_gotconfig **conf, const char *gotconfig_path)
 44 400c1baa 2022-10-13 thomas {
 45 400c1baa 2022-10-13 thomas 	const struct got_error *err = NULL, *child_err = NULL;
 46 400c1baa 2022-10-13 thomas 	int fd = -1;
 47 400c1baa 2022-10-13 thomas 	int imsg_fds[2] = { -1, -1 };
 48 400c1baa 2022-10-13 thomas 	pid_t pid;
 49 400c1baa 2022-10-13 thomas 	struct imsgbuf *ibuf;
 50 400c1baa 2022-10-13 thomas 
 51 400c1baa 2022-10-13 thomas 	*conf = calloc(1, sizeof(**conf));
 52 400c1baa 2022-10-13 thomas 	if (*conf == NULL)
 53 400c1baa 2022-10-13 thomas 		return got_error_from_errno("calloc");
 54 400c1baa 2022-10-13 thomas 
 55 400c1baa 2022-10-13 thomas 	fd = open(gotconfig_path, O_RDONLY | O_CLOEXEC);
 56 400c1baa 2022-10-13 thomas 	if (fd == -1) {
 57 400c1baa 2022-10-13 thomas 		if (errno == ENOENT)
 58 400c1baa 2022-10-13 thomas 			return NULL;
 59 400c1baa 2022-10-13 thomas 		return got_error_from_errno2("open", gotconfig_path);
 60 400c1baa 2022-10-13 thomas 	}
 61 400c1baa 2022-10-13 thomas 
 62 400c1baa 2022-10-13 thomas 	ibuf = calloc(1, sizeof(*ibuf));
 63 400c1baa 2022-10-13 thomas 	if (ibuf == NULL) {
 64 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("calloc");
 65 400c1baa 2022-10-13 thomas 		goto done;
 66 400c1baa 2022-10-13 thomas 	}
 67 400c1baa 2022-10-13 thomas 
 68 400c1baa 2022-10-13 thomas 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
 69 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("socketpair");
 70 400c1baa 2022-10-13 thomas 		goto done;
 71 400c1baa 2022-10-13 thomas 	}
 72 400c1baa 2022-10-13 thomas 
 73 400c1baa 2022-10-13 thomas 	pid = fork();
 74 400c1baa 2022-10-13 thomas 	if (pid == -1) {
 75 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("fork");
 76 400c1baa 2022-10-13 thomas 		goto done;
 77 400c1baa 2022-10-13 thomas 	} else if (pid == 0) {
 78 400c1baa 2022-10-13 thomas 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GOTCONFIG,
 79 400c1baa 2022-10-13 thomas 		    gotconfig_path);
 80 400c1baa 2022-10-13 thomas 		/* not reached */
 81 400c1baa 2022-10-13 thomas 	}
 82 400c1baa 2022-10-13 thomas 
 83 400c1baa 2022-10-13 thomas 	if (close(imsg_fds[1]) == -1) {
 84 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("close");
 85 400c1baa 2022-10-13 thomas 		goto done;
 86 400c1baa 2022-10-13 thomas 	}
 87 400c1baa 2022-10-13 thomas 	imsg_fds[1] = -1;
 88 400c1baa 2022-10-13 thomas 	imsg_init(ibuf, imsg_fds[0]);
 89 400c1baa 2022-10-13 thomas 
 90 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_parse_req(ibuf, fd);
 91 400c1baa 2022-10-13 thomas 	if (err)
 92 400c1baa 2022-10-13 thomas 		goto done;
 93 400c1baa 2022-10-13 thomas 	fd = -1;
 94 400c1baa 2022-10-13 thomas 
 95 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_author_req(ibuf);
 96 400c1baa 2022-10-13 thomas 	if (err)
 97 400c1baa 2022-10-13 thomas 		goto done;
 98 400c1baa 2022-10-13 thomas 
 99 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_str(&(*conf)->author, ibuf);
100 400c1baa 2022-10-13 thomas 	if (err)
101 400c1baa 2022-10-13 thomas 		goto done;
102 400c1baa 2022-10-13 thomas 
103 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_allowed_signers_req(ibuf);
104 400c1baa 2022-10-13 thomas 	if (err)
105 400c1baa 2022-10-13 thomas 		goto done;
106 400c1baa 2022-10-13 thomas 
107 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_str(&(*conf)->allowed_signers_file,
108 400c1baa 2022-10-13 thomas 	    ibuf);
109 400c1baa 2022-10-13 thomas 	if (err)
110 400c1baa 2022-10-13 thomas 		goto done;
111 400c1baa 2022-10-13 thomas 
112 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_revoked_signers_req(ibuf);
113 400c1baa 2022-10-13 thomas 	if (err)
114 400c1baa 2022-10-13 thomas 		goto done;
115 400c1baa 2022-10-13 thomas 
116 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_str(&(*conf)->revoked_signers_file,
117 400c1baa 2022-10-13 thomas 	    ibuf);
118 400c1baa 2022-10-13 thomas 	if (err)
119 400c1baa 2022-10-13 thomas 		goto done;
120 400c1baa 2022-10-13 thomas 
121 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_signer_id_req(ibuf);
122 400c1baa 2022-10-13 thomas 	if (err)
123 400c1baa 2022-10-13 thomas 		goto done;
124 400c1baa 2022-10-13 thomas 
125 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_str(&(*conf)->signer_id, ibuf);
126 400c1baa 2022-10-13 thomas 	if (err)
127 400c1baa 2022-10-13 thomas 		goto done;
128 400c1baa 2022-10-13 thomas 
129 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_remotes_req(ibuf);
130 400c1baa 2022-10-13 thomas 	if (err)
131 400c1baa 2022-10-13 thomas 		goto done;
132 400c1baa 2022-10-13 thomas 
133 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_remotes(&(*conf)->remotes,
134 400c1baa 2022-10-13 thomas 	    &(*conf)->nremotes, ibuf);
135 400c1baa 2022-10-13 thomas 	if (err)
136 400c1baa 2022-10-13 thomas 		goto done;
137 400c1baa 2022-10-13 thomas 
138 400c1baa 2022-10-13 thomas 	err = got_privsep_send_stop(imsg_fds[0]);
139 400c1baa 2022-10-13 thomas 	child_err = got_privsep_wait_for_child(pid);
140 400c1baa 2022-10-13 thomas 	if (child_err && err == NULL)
141 400c1baa 2022-10-13 thomas 		err = child_err;
142 400c1baa 2022-10-13 thomas done:
143 400c1baa 2022-10-13 thomas 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
144 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("close");
145 400c1baa 2022-10-13 thomas 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
146 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("close");
147 400c1baa 2022-10-13 thomas 	if (fd != -1 && close(fd) == -1 && err == NULL)
148 400c1baa 2022-10-13 thomas 		err = got_error_from_errno2("close", gotconfig_path);
149 400c1baa 2022-10-13 thomas 	if (err) {
150 400c1baa 2022-10-13 thomas 		got_gotconfig_free(*conf);
151 400c1baa 2022-10-13 thomas 		*conf = NULL;
152 400c1baa 2022-10-13 thomas 	}
153 400c1baa 2022-10-13 thomas 	free(ibuf);
154 400c1baa 2022-10-13 thomas 	return err;
155 400c1baa 2022-10-13 thomas }