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 4fccd2fe 2023-03-08 thomas #include "got_compat.h"
 32 400c1baa 2022-10-13 thomas #include "got_error.h"
 33 400c1baa 2022-10-13 thomas #include "got_object.h"
 34 400c1baa 2022-10-13 thomas #include "got_repository.h"
 35 400c1baa 2022-10-13 thomas 
 36 400c1baa 2022-10-13 thomas #include "got_lib_delta.h"
 37 400c1baa 2022-10-13 thomas #include "got_lib_object.h"
 38 400c1baa 2022-10-13 thomas #include "got_lib_privsep.h"
 39 400c1baa 2022-10-13 thomas #include "got_lib_gotconfig.h"
 40 400c1baa 2022-10-13 thomas 
 41 400c1baa 2022-10-13 thomas #include "got_gotconfig.h"
 42 400c1baa 2022-10-13 thomas 
 43 400c1baa 2022-10-13 thomas const struct got_error *
 44 400c1baa 2022-10-13 thomas got_gotconfig_read(struct got_gotconfig **conf, const char *gotconfig_path)
 45 400c1baa 2022-10-13 thomas {
 46 400c1baa 2022-10-13 thomas 	const struct got_error *err = NULL, *child_err = NULL;
 47 400c1baa 2022-10-13 thomas 	int fd = -1;
 48 400c1baa 2022-10-13 thomas 	int imsg_fds[2] = { -1, -1 };
 49 400c1baa 2022-10-13 thomas 	pid_t pid;
 50 2aef7b23 2022-10-27 thomas 	struct imsgbuf *ibuf = NULL;
 51 400c1baa 2022-10-13 thomas 
 52 400c1baa 2022-10-13 thomas 	*conf = calloc(1, sizeof(**conf));
 53 400c1baa 2022-10-13 thomas 	if (*conf == NULL)
 54 400c1baa 2022-10-13 thomas 		return got_error_from_errno("calloc");
 55 400c1baa 2022-10-13 thomas 
 56 400c1baa 2022-10-13 thomas 	fd = open(gotconfig_path, O_RDONLY | O_CLOEXEC);
 57 400c1baa 2022-10-13 thomas 	if (fd == -1) {
 58 400c1baa 2022-10-13 thomas 		if (errno == ENOENT)
 59 400c1baa 2022-10-13 thomas 			return NULL;
 60 2aef7b23 2022-10-27 thomas 		err = got_error_from_errno2("open", gotconfig_path);
 61 2aef7b23 2022-10-27 thomas 		goto done;
 62 400c1baa 2022-10-13 thomas 	}
 63 400c1baa 2022-10-13 thomas 
 64 400c1baa 2022-10-13 thomas 	ibuf = calloc(1, sizeof(*ibuf));
 65 400c1baa 2022-10-13 thomas 	if (ibuf == NULL) {
 66 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("calloc");
 67 400c1baa 2022-10-13 thomas 		goto done;
 68 400c1baa 2022-10-13 thomas 	}
 69 400c1baa 2022-10-13 thomas 
 70 400c1baa 2022-10-13 thomas 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
 71 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("socketpair");
 72 400c1baa 2022-10-13 thomas 		goto done;
 73 400c1baa 2022-10-13 thomas 	}
 74 400c1baa 2022-10-13 thomas 
 75 400c1baa 2022-10-13 thomas 	pid = fork();
 76 400c1baa 2022-10-13 thomas 	if (pid == -1) {
 77 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("fork");
 78 400c1baa 2022-10-13 thomas 		goto done;
 79 400c1baa 2022-10-13 thomas 	} else if (pid == 0) {
 80 400c1baa 2022-10-13 thomas 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GOTCONFIG,
 81 400c1baa 2022-10-13 thomas 		    gotconfig_path);
 82 400c1baa 2022-10-13 thomas 		/* not reached */
 83 400c1baa 2022-10-13 thomas 	}
 84 400c1baa 2022-10-13 thomas 
 85 400c1baa 2022-10-13 thomas 	if (close(imsg_fds[1]) == -1) {
 86 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("close");
 87 400c1baa 2022-10-13 thomas 		goto done;
 88 400c1baa 2022-10-13 thomas 	}
 89 400c1baa 2022-10-13 thomas 	imsg_fds[1] = -1;
 90 400c1baa 2022-10-13 thomas 	imsg_init(ibuf, imsg_fds[0]);
 91 400c1baa 2022-10-13 thomas 
 92 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_parse_req(ibuf, fd);
 93 400c1baa 2022-10-13 thomas 	if (err)
 94 400c1baa 2022-10-13 thomas 		goto done;
 95 400c1baa 2022-10-13 thomas 	fd = -1;
 96 400c1baa 2022-10-13 thomas 
 97 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_author_req(ibuf);
 98 400c1baa 2022-10-13 thomas 	if (err)
 99 400c1baa 2022-10-13 thomas 		goto done;
100 400c1baa 2022-10-13 thomas 
101 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_str(&(*conf)->author, ibuf);
102 400c1baa 2022-10-13 thomas 	if (err)
103 400c1baa 2022-10-13 thomas 		goto done;
104 400c1baa 2022-10-13 thomas 
105 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_allowed_signers_req(ibuf);
106 400c1baa 2022-10-13 thomas 	if (err)
107 400c1baa 2022-10-13 thomas 		goto done;
108 400c1baa 2022-10-13 thomas 
109 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_str(&(*conf)->allowed_signers_file,
110 400c1baa 2022-10-13 thomas 	    ibuf);
111 400c1baa 2022-10-13 thomas 	if (err)
112 400c1baa 2022-10-13 thomas 		goto done;
113 400c1baa 2022-10-13 thomas 
114 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_revoked_signers_req(ibuf);
115 400c1baa 2022-10-13 thomas 	if (err)
116 400c1baa 2022-10-13 thomas 		goto done;
117 400c1baa 2022-10-13 thomas 
118 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_str(&(*conf)->revoked_signers_file,
119 400c1baa 2022-10-13 thomas 	    ibuf);
120 400c1baa 2022-10-13 thomas 	if (err)
121 400c1baa 2022-10-13 thomas 		goto done;
122 400c1baa 2022-10-13 thomas 
123 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_signer_id_req(ibuf);
124 400c1baa 2022-10-13 thomas 	if (err)
125 400c1baa 2022-10-13 thomas 		goto done;
126 400c1baa 2022-10-13 thomas 
127 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_str(&(*conf)->signer_id, ibuf);
128 400c1baa 2022-10-13 thomas 	if (err)
129 400c1baa 2022-10-13 thomas 		goto done;
130 400c1baa 2022-10-13 thomas 
131 400c1baa 2022-10-13 thomas 	err = got_privsep_send_gotconfig_remotes_req(ibuf);
132 400c1baa 2022-10-13 thomas 	if (err)
133 400c1baa 2022-10-13 thomas 		goto done;
134 400c1baa 2022-10-13 thomas 
135 400c1baa 2022-10-13 thomas 	err = got_privsep_recv_gotconfig_remotes(&(*conf)->remotes,
136 400c1baa 2022-10-13 thomas 	    &(*conf)->nremotes, ibuf);
137 400c1baa 2022-10-13 thomas 	if (err)
138 400c1baa 2022-10-13 thomas 		goto done;
139 400c1baa 2022-10-13 thomas 
140 400c1baa 2022-10-13 thomas 	err = got_privsep_send_stop(imsg_fds[0]);
141 400c1baa 2022-10-13 thomas 	child_err = got_privsep_wait_for_child(pid);
142 400c1baa 2022-10-13 thomas 	if (child_err && err == NULL)
143 400c1baa 2022-10-13 thomas 		err = child_err;
144 400c1baa 2022-10-13 thomas done:
145 400c1baa 2022-10-13 thomas 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
146 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("close");
147 400c1baa 2022-10-13 thomas 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
148 400c1baa 2022-10-13 thomas 		err = got_error_from_errno("close");
149 400c1baa 2022-10-13 thomas 	if (fd != -1 && close(fd) == -1 && err == NULL)
150 400c1baa 2022-10-13 thomas 		err = got_error_from_errno2("close", gotconfig_path);
151 400c1baa 2022-10-13 thomas 	if (err) {
152 400c1baa 2022-10-13 thomas 		got_gotconfig_free(*conf);
153 400c1baa 2022-10-13 thomas 		*conf = NULL;
154 400c1baa 2022-10-13 thomas 	}
155 400c1baa 2022-10-13 thomas 	free(ibuf);
156 400c1baa 2022-10-13 thomas 	return err;
157 400c1baa 2022-10-13 thomas }