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uacme.c
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uacme.c
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/*
* Copyright (C) 2019-2024 Nicola Di Lieto <[email protected]>
*
* This file is part of uacme.
*
* uacme is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* uacme is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <libgen.h>
#include <locale.h>
#include <regex.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include "base64.h"
#include "curlwrap.h"
#include "crypto.h"
#include "json.h"
#include "msg.h"
#define PRODUCTION_URL "https://acme-v02.api.letsencrypt.org/directory"
#define STAGING_URL "https://acme-staging-v02.api.letsencrypt.org/directory"
#define DEFAULT_CONFDIR SYSCONFDIR "/ssl/uacme"
typedef struct acme {
privkey_t key;
json_value_t *json;
json_value_t *account;
json_value_t *dir;
json_value_t *order;
char *nonce;
char *kid;
char *headers;
char *body;
char *type;
unsigned char alt_fp[32];
size_t alt_fp_len;
size_t alt_n;
const char *eab_keyid;
const char *eab_key;
const char *directory;
const char *hook;
const char *email;
char *keyprefix;
char *certprefix;
} acme_t;
#if !HAVE_STRCASESTR
char *strcasestr(const char *haystack, const char *needle)
{
char *ret = NULL;
char *_haystack = strdup(haystack);
char *_needle = strdup(needle);
if (!_haystack || !_needle)
warn("strcasestr: strdup failed");
else {
char *p;
for (p = _haystack; *p; p++)
*p = tolower(*p);
for (p = _needle; *p; p++)
*p = tolower(*p);
ret = strstr(_haystack, _needle);
if (ret)
ret = (char *)haystack + (ret - _haystack);
}
free(_haystack);
free(_needle);
return ret;
}
#endif
char *find_header(const char *headers, const char *name)
{
char *regex = NULL;
if (asprintf(®ex, "^%s:[ \t]*(.*)\r\n", name) < 0) {
warnx("find_header: asprintf failed");
return NULL;
}
char *ret = NULL;
regex_t reg;
if (regcomp(®, regex, REG_EXTENDED | REG_ICASE | REG_NEWLINE)) {
warnx("find_header: regcomp failed");
} else {
regmatch_t m[2];
if (regexec(®, headers, 2, m, 0) == 0) {
ret = strndup(headers + m[1].rm_so, m[1].rm_eo - m[1].rm_so);
if (!ret)
warn("find_header: strndup failed");
}
}
free(regex);
regfree(®);
return ret;
}
int acme_get(acme_t *a, const char *url)
{
int ret = 0;
json_free(a->json);
a->json = NULL;
free(a->headers);
a->headers = NULL;
free(a->body);
a->body = NULL;
free(a->type);
a->type = NULL;
if (!url) {
warnx("acme_get: invalid URL");
goto out;
}
if (g_loglevel > 1)
warnx("acme_get: url=%s", url);
curldata_t *c = curl_get(url);
if (!c) {
warnx("acme_get: curl_get failed");
goto out;
}
free(a->nonce);
a->nonce = find_header(c->headers, "Replay-Nonce");
a->type = find_header(c->headers, "Content-Type");
if (a->type && strcasestr(a->type, "json"))
a->json = json_parse(c->body, c->body_len);
a->headers = c->headers;
c->headers = NULL;
a->body = c->body;
c->body = NULL;
ret = c->code;
curldata_free(c);
out:
if (g_loglevel > 2) {
if (a->headers)
warnx("acme_get: HTTP headers\n%s", a->headers);
if (a->body)
warnx("acme_get: HTTP body\n%s", a->body);
}
if (g_loglevel > 1) {
if (a->json) {
warnx("acme_get: return code %d, json=", ret);
json_dump(stderr, a->json);
} else
warnx("acme_get: return code %d", ret);
}
if (!a->headers)
a->headers = strdup("");
if (!a->body)
a->body = strdup("");
if (!a->type)
a->type = strdup("");
return ret;
}
bool acme_error(acme_t *a)
{
if (!a->json) return false;
if (a->type && strcasestr(a->type, "application/problem+json")) {
warnx("the server reported the following error:");
json_dump(stderr, a->json);
return true;
}
const json_value_t *e = json_find(a->json, "error");
if (e && e->type == JSON_OBJECT) {
warnx("the server reported the following error:");
json_dump(stderr, e);
return true;
}
return false;
}
bool acme_nonce(acme_t *a)
{
const char *url = json_find_string(a->dir, "newNonce");
if (!url)
{
warnx("failed to find newNonce URL in directory");
return false;
}
msg(2, "fetching new nonce at %s", url);
if (acme_get(a, url) != 204) {
warnx("failed to fetch new nonce at %s", url);
acme_error(a);
return false;
} else if (acme_error(a))
return false;
else if (!a->nonce) {
warnx("failed to find nonce in newNonce resource");
return false;
}
return true;
}
int acme_post(acme_t *a, const char *url, const char *format, ...)
{
int ret = 0;
char *payload = NULL;
char *protected = NULL;
char *jws = NULL;
if (!url) {
warnx("acme_post: invalid URL");
return 0;
}
if (!a->nonce && !acme_nonce(a)) {
warnx("acme_post: no nonce available");
return 0;
}
va_list ap;
va_start(ap, format);
if (vasprintf(&payload, format, ap) < 0)
payload = NULL;
va_end(ap);
if (!payload) {
warnx("acme_post: vasprintf failed");
return 0;
}
for (int retry = 0; a->nonce && retry < 3; retry++) {
if (retry > 0)
msg(1, "acme_post: server rejected nonce, retrying");
json_free(a->json);
a->json = NULL;
free(a->headers);
a->headers = NULL;
free(a->body);
a->body = NULL;
free(a->type);
a->type = NULL;
protected = (a->kid && *a->kid) ?
jws_protected_kid(a->nonce, url, a->kid, a->key) :
jws_protected_jwk(a->nonce, url, a->key);
if (!protected) {
warnx("acme_post: jws_protected_xxx failed");
goto out;
}
jws = jws_encode(protected, payload, a->key);
if (!jws) {
warnx("acme_post: jws_encode failed");
goto out;
}
if (g_loglevel > 2)
warnx("acme_post: url=%s payload=%s protected=%s jws=%s",
url, payload, protected, jws);
else if (g_loglevel > 1)
warnx("acme_post: url=%s payload=%s", url, payload);
curldata_t *c = curl_post(url, jws, strlen(jws),
"Content-Type: application/jose+json", NULL);
if (!c) {
warnx("acme_post: curl_post failed");
goto out;
}
free(a->nonce);
a->nonce = find_header(c->headers, "Replay-Nonce");
a->type = find_header(c->headers, "Content-Type");
if (a->type && strcasestr(a->type, "json"))
a->json = json_parse(c->body, c->body_len);
a->headers = c->headers;
c->headers = NULL;
a->body = c->body;
c->body = NULL;
ret = c->code;
curldata_free(c);
if (g_loglevel > 2) {
if (a->headers)
warnx("acme_post: HTTP headers:\n%s", a->headers);
if (a->body)
warnx("acme_post: HTTP body:\n%s", a->body);
}
if (g_loglevel > 1) {
if (a->json) {
warnx("acme_post: return code %d, json=", ret);
json_dump(stderr, a->json);
} else
warnx("acme_post: return code %d", ret);
}
if (ret != 400 || !a->type || !a->nonce || !a->json ||
!strcasestr(a->type, "application/problem+json") ||
json_compare_string(a->json, "type",
"urn:ietf:params:acme:error:badNonce") != 0)
break;
}
out:
free(payload);
free(protected);
free(jws);
if (!a->headers)
a->headers = strdup("");
if (!a->body)
a->body = strdup("");
if (!a->type)
a->type = strdup("");
return ret;
}
int hook_run(const char *prog, const char *method, const char *type,
const char *ident, const char *token, const char *auth)
{
int ret = -1;
pid_t pid = fork();
if (pid < 0)
warn("hook_run: fork failed");
else if (pid > 0) { // parent
int status;
if (waitpid(pid, &status, 0) < 0)
warn("hook_run: waitpid failed");
else if (WIFEXITED(status))
ret = WEXITSTATUS(status);
else
warnx("hook_run: %s terminated abnormally", prog);
} else { // child
if (execl(prog, prog, method, type, ident, token, auth,
(char *)NULL) < 0) {
warn("hook_run: failed to execute %s", prog);
abort();
}
}
return ret;
}
bool check_or_mkdir(bool allow_create, const char *dir, mode_t mode)
{
bool ret = false;
char *tmp = strdup(dir);
if (!tmp) {
warnx("check_or_mkdir: strdup failed");
goto out;
}
for (size_t i = strlen(tmp); i > 1; i--) {
if (tmp[i - 1] != '/')
break;
tmp[i - 1] = 0;
}
if (access(dir, F_OK) < 0) {
if (!allow_create) {
warnx("failed to access %s", dir);
goto out;
}
if (mkdir(dir, mode) < 0) {
warn("failed to create %s", dir);
goto out;
}
msg(1, "created directory %s", dir);
}
struct stat st;
if (stat(dir, &st) != 0) {
warn("failed to stat %s", dir);
goto out;
}
if (!S_ISDIR(st.st_mode)) {
warnx("%s is not a directory", dir);
goto out;
}
ret = true;
out:
free(tmp);
return ret;
}
char *identifiers(char * const *names)
{
char *ids = NULL;
char *tmp = NULL;
if (asprintf(&tmp, "{\"identifiers\":[") < 0) {
warnx("identifiers: asprintf failed");
return NULL;
}
while (names && *names) {
if (asprintf(&ids, "%s{\"type\":\"%s\",\"value\":\"%s\"},", tmp,
is_ip(*names, NULL, NULL) ? "ip" : "dns", *names) < 0) {
warnx("identifiers: asprintf failed");
free(tmp);
return NULL;
}
free(tmp);
tmp = ids;
ids = NULL;
names++;
}
tmp[strlen(tmp)-1] = 0;
if (asprintf(&ids, "%s]}", tmp) < 0) {
warnx("identifiers: asprintf failed");
ids = NULL;
}
free(tmp);
return ids;
}
bool acme_bootstrap(acme_t *a)
{
msg(1, "fetching directory at %s", a->directory);
if (acme_get(a, a->directory) != 200) {
warnx("failed to fetch directory at %s", a->directory);
acme_error(a);
return false;
} else if (acme_error(a))
return false;
a->dir = a->json;
a->json = NULL;
return true;
}
char *eab_encode(acme_t *a, const char *url)
{
char *protected = NULL;
char *payload = NULL;
char *jws = NULL;
protected = jws_protected_eab(256, a->eab_keyid, url);
if (!protected) {
warnx("eab_encode: jws_protected_eab failed");
goto out;
}
payload = jws_jwk(a->key, NULL, NULL);
if (!payload) {
warnx("eab_encode: jws_jwk failed");
goto out;
}
jws = jws_encode_hmac(protected, payload, 256, a->eab_key);
if (!jws) {
warnx("eab_encode: jws_encode_hmac failed");
goto out;
}
if (g_loglevel > 2)
warnx("eab_encode: payload=%s protected=%s jws=%s",
payload, protected, jws);
out:
free(protected);
free(payload);
return jws;
}
bool account_new(acme_t *a, bool yes)
{
const char *url = json_find_string(a->dir, "newAccount");
if (!url) {
warnx("failed to find newAccount URL in directory");
return false;
}
msg(1, "creating new account at %s", url);
switch (acme_post(a, url, "{\"onlyReturnExisting\":true}")) {
case 200:
if (!(a->kid = find_header(a->headers, "Location")))
{
warnx("account exists but location not found");
return false;
}
warnx("Account already exists at %s", a->kid);
return false;
case 400:
if (a->json && a->type &&
strcasestr(a->type, "application/problem+json") &&
json_compare_string(a->json, "type",
"urn:ietf:params:acme:error:accountDoesNotExist") == 0) {
const json_value_t *meta = json_find(a->dir, "meta");
const char *ext = json_find_value(meta,
"externalAccountRequired");
if (ext && strcasecmp(ext, "true") == 0 && !a->eab_key) {
msg(0, "this ACME server requires external credentials, "
"please supply them with -e KEYID:KEY");
return false;
}
const char *terms = json_find_string(meta, "termsOfService");
if (terms) {
if (yes)
msg(0, "terms at %s autoaccepted (-y)", terms);
else {
char c = 0;
msg(0, "type 'y' to accept the terms at %s", terms);
if (scanf(" %c", &c) != 1 || tolower(c) != 'y') {
warnx("terms not agreed to, aborted");
return false;
}
}
}
char *payload = strdup("\"termsOfServiceAgreed\":true");
if (!payload) {
warn("account_new: strdup failed");
return false;
}
if (a->email && strlen(a->email)) {
char *tmp = NULL;
if (asprintf(&tmp, "%s,\"contact\": [\"mailto:%s\"]",
payload, a->email) < 0) {
warnx("account_new: asprintf failed");
free(tmp);
free(payload);
return false;
}
free(payload);
payload = tmp;
}
if (a->eab_key) {
char *tmp = NULL;
char *eab = eab_encode(a, url);
if (!eab) {
warnx("account_new: eab_encode failed");
free(payload);
return false;
}
if (asprintf(&tmp, "%s,\"externalAccountBinding\": %s",
payload, eab) < 0) {
warnx("account_new: asprintf failed");
free(tmp);
free(eab);
free(payload);
return false;
}
free(eab);
free(payload);
payload = tmp;
}
int r = acme_post(a, url, "{%s}", payload);
free(payload);
if (r == 201) {
if (acme_error(a))
return false;
if (json_compare_string(a->json, "status", "valid")) {
const char *st = json_find_string(a->json, "status");
warnx("account created but status is not valid (%s)",
st ? st : "unknown");
return false;
}
if (!(a->kid = find_header(a->headers, "Location"))) {
warnx("account created but location not found");
return false;
}
msg(1, "account created at %s", a->kid);
return true;
}
}
// intentional fallthrough
default:
warnx("failed to create account at %s", url);
acme_error(a);
return false;
}
}
bool account_retrieve(acme_t *a)
{
const char *url = json_find_string(a->dir, "newAccount");
if (!url) {
warnx("failed to find newAccount URL in directory");
return false;
}
msg(1, "retrieving account at %s", url);
switch (acme_post(a, url, "{\"onlyReturnExisting\":true}")) {
case 200:
if (acme_error(a))
return false;
break;
case 400:
if (a->json && a->type &&
strcasestr(a->type, "application/problem+json") &&
json_compare_string(a->json, "type",
"urn:ietf:params:acme:error:accountDoesNotExist") == 0) {
warnx("no account associated with %s/key.pem found at %s. "
"Consider trying 'new'", a->keyprefix, url);
return false;
}
// intentional fallthrough
default:
warnx("failed to retrieve account at %s", url);
acme_error(a);
return false;
}
const char *status = json_find_string(a->json, "status");
if (status && strcmp(status, "valid")) {
warnx("invalid account status (%s)", status);
return false;
}
if (!(a->kid = find_header(a->headers, "Location"))) {
warnx("account location not found");
return false;
}
msg(1, "account location: %s", a->kid);
a->account = a->json;
a->json = NULL;
return true;
}
bool account_update(acme_t *a)
{
bool email_update = false;
const json_value_t *contacts = json_find(a->account, "contact");
if (contacts && contacts->type != JSON_ARRAY) {
warnx("failed to parse account contacts");
return false;
}
if (a->email && strlen(a->email) > 0) {
if (!contacts || contacts->v.array.size == 0)
email_update = true;
else for (size_t i=0; i<contacts->v.array.size; i++) {
if (contacts->v.array.values[i].type != JSON_STRING ||
strcasestr(contacts->v.array.values[i].v.value,
"mailto:") != contacts->v.array.values[i].v.value) {
warnx("failed to parse account contacts");
return false;
}
if (strcasecmp(contacts->v.array.values[i].v.value
+ strlen("mailto:"), a->email))
email_update = true;
}
}
else if (contacts && contacts->v.array.size > 0)
email_update = true;
if (email_update) {
int ret = 0;
if (a->email && strlen(a->email) > 0) {
msg(1, "updating account email to %s at %s", a->email, a->kid);
ret = acme_post(a, a->kid, "{\"contact\": [\"mailto:%s\"]}",
a->email);
} else {
msg(1, "removing account email at %s", a->kid);
ret = acme_post(a, a->kid, "{\"contact\": []}");
}
if (ret != 200) {
warnx("failed to update account email at %s", a->kid);
acme_error(a);
return false;
} else if (acme_error(a))
return false;
msg(1, "account at %s updated", a->kid);
}
else
msg(1, "email is already up to date for account at %s", a->kid);
return true;
}
bool account_keychange(acme_t *a, bool never, keytype_t type, int bits)
{
bool success = false;
privkey_t newkey = NULL;
char *newkeyfile = NULL;
char *keyfile = NULL;
char *bakfile = NULL;
char *protected = NULL;
char *payload = NULL;
char *jwk = NULL;
char *jws = NULL;
const char *url = json_find_string(a->dir, "keyChange");
if (!url) {
warnx("account_keychange: failed to find keyChange URL in directory");
goto out;
}
if (asprintf(&keyfile, "%s/key.pem", a->keyprefix) < 0) {
warnx("account_keychange: asprintf failed");
keyfile = NULL;
goto out;
}
if (asprintf(&bakfile, "%s/key-%llu.pem", a->keyprefix,
(unsigned long long)time(NULL)) < 0) {
warnx("account_keychange: asprintf failed");
bakfile = NULL;
goto out;
}
if (asprintf(&newkeyfile, "%s/newkey.pem", a->keyprefix) < 0) {
warnx("account_keychange: asprintf failed");
newkeyfile = NULL;
goto out;
}
newkey = key_load(never ? PK_NONE : type, bits, newkeyfile);
if (!newkey)
goto out;
protected = jws_protected_jwk(NULL, url, newkey);
if (!protected) {
warnx("account_keychange: jws_protected_jwk failed");
goto out;
}
jwk = jws_jwk(a->key, NULL, NULL);
if (!jwk) {
warnx("account_keychange: jws_jwk failed");
goto out;
}
if (asprintf(&payload, "{\"account\":\"%s\",\"oldKey\":%s}",
a->kid, jwk) < 0) {
warnx("account_keychange: asprintf failed");
payload = NULL;
goto out;
}
jws = jws_encode(protected, payload, newkey);
if (!jws) {
warnx("account_keychange: jws_encode failed");
goto out;
}
if (g_loglevel > 2)
warnx("account_keychange: url=%s payload=%s protected=%s jws=%s",
url, payload, protected, jws);
else if (g_loglevel > 1)
warnx("account_keychange: url=%s payload=%s", url, payload);
msg(1, "changing account key at %s", url);
if (acme_post(a, url, jws) != 200) {
warnx("failed to change account key at %s", url);
acme_error(a);
goto out;
} else if (acme_error(a))
goto out;
msg(1, "backing up %s as %s", keyfile, bakfile);
if (link(keyfile, bakfile) < 0)
warn("failed to link %s to %s", bakfile, keyfile);
else {
msg(1, "renaming %s to %s", newkeyfile, keyfile);
if (rename(newkeyfile, keyfile) < 0) {
warn("failed to rename %s to %s", newkeyfile, keyfile);
unlink(bakfile);
} else {
msg(1, "account key changed");
success = true;
}
}
if (!success) {
warnx("WARNING: account key changed but %s NOT replaced by %s",
keyfile, newkeyfile);
goto out;
}
out:
if (newkey)
privkey_deinit(newkey);
free(newkeyfile);
free(keyfile);
free(bakfile);
free(protected);
free(payload);
free(jwk);
free(jws);
return success;
}
bool account_deactivate(acme_t *a)
{
msg(1, "deactivating account at %s", a->kid);
if (acme_post(a, a->kid, "{\"status\": \"deactivated\"}") != 200) {
warnx("failed to deactivate account at %s", a->kid);
acme_error(a);
return false;
} else if (acme_error(a))
return false;
msg(1, "account at %s deactivated", a->kid);
return true;
}
bool authorize(acme_t *a)
{
bool success = false;
char *thumbprint = NULL;
json_value_t *auth = NULL;
const json_value_t *auths = json_find(a->order, "authorizations");
if (!auths || auths->type != JSON_ARRAY) {
warnx("failed to parse authorizations URL");
goto out;
}
thumbprint = jws_thumbprint(a->key);
if (!thumbprint)
goto out;
for (size_t i=0; i<auths->v.array.size; i++) {
if (auths->v.array.values[i].type != JSON_STRING) {
warnx("failed to parse authorizations URL");
goto out;
}
msg(1, "retrieving authorization at %s",
auths->v.array.values[i].v.value);
if (acme_post(a, auths->v.array.values[i].v.value, "") != 200) {
warnx("failed to retrieve auth %s",
auths->v.array.values[i].v.value);
acme_error(a);
goto out;
}
const char *status = json_find_string(a->json, "status");
if (status && strcmp(status, "valid") == 0)
continue;
if (!status || strcmp(status, "pending") != 0) {
warnx("unexpected auth status (%s) at %s",
status ? status : "unknown",
auths->v.array.values[i].v.value);
acme_error(a);
goto out;
}
const json_value_t *ident = json_find(a->json, "identifier");
const char *ident_type = json_find_string(ident, "type");
if (!ident_type || (strcmp(ident_type, "dns") != 0 &&
strcmp(ident_type, "ip") != 0)) {
warnx("no valid identifier in auth %s",
auths->v.array.values[i].v.value);
goto out;
}
const char *ident_value = json_find_string(ident, "value");
if (!ident_value || strlen(ident_value) <= 0) {
warnx("no valid identifier in auth %s",
auths->v.array.values[i].v.value);
goto out;
}
const json_value_t *chlgs = json_find(a->json, "challenges");
if (!chlgs || chlgs->type != JSON_ARRAY) {
warnx("no challenges in auth %s",
auths->v.array.values[i].v.value);
goto out;
}
json_free(auth);
auth = a->json;
a->json = NULL;
bool chlg_done = false;
for (size_t j=0; j<chlgs->v.array.size && !chlg_done; j++) {
const char *status = json_find_string(
chlgs->v.array.values+j, "status");
if (status && (strcmp(status, "pending") == 0
|| strcmp(status, "processing") == 0)) {
const char *url = json_find_string(
chlgs->v.array.values+j, "url");
const char *type = json_find_string(
chlgs->v.array.values+j, "type");
const char *token = json_find_string(
chlgs->v.array.values+j, "token");
char *key_auth = NULL;
if (!type || !url || !token) {
warnx("failed to parse challenge");
goto out;
}
for (const char *t = token; *t; t++)
if (!isalnum(*t) && *t != '-' && *t != '_') {
warnx("failed to validate token");
goto out;
}
if (strcmp(type, "dns-01") == 0 ||
strcmp(type, "tls-alpn-01") == 0)
key_auth = sha2_base64url(256, "%s.%s", token, thumbprint);
else if (asprintf(&key_auth, "%s.%s", token, thumbprint) < 0)
key_auth = NULL;
if (!key_auth) {
warnx("failed to generate authorization key");
goto out;
}
if (a->hook && strlen(a->hook) > 0) {
msg(2, "type=%s", type);
msg(2, "ident=%s", ident_value);
msg(2, "token=%s", token);
msg(2, "key_auth=%s", key_auth);
msg(1, "running %s %s %s %s %s %s", a->hook, "begin",
type, ident_value, token, key_auth);
int r = hook_run(a->hook, "begin", type, ident_value, token,
key_auth);
msg(2, "hook returned %d", r);
if (r < 0) {
free(key_auth);
goto out;
} else if (r > 0) {
msg(1, "challenge %s declined", type);
free(key_auth);
continue;
}
} else {
char c = 0;
msg(0, "challenge=%s ident=%s token=%s key_auth=%s",
type, ident_value, token, key_auth);
msg(0, "type 'y' followed by a newline to accept challenge"
", anything else to skip");
if (scanf(" %c", &c) != 1 || tolower(c) != 'y') {
free(key_auth);
continue;
}
}
msg(1, "starting challenge at %s", url);
if (acme_post(a, url, "{}") != 200) {
warnx("failed to start challenge at %s", url);
acme_error(a);
} else for (unsigned u = 5; !chlg_done; u *= 2) {
msg(1, "polling challenge status at %s", url);
if (acme_post(a, url, "") != 200) {
warnx("failed to poll challenge status at %s", url);
acme_error(a);
break;
}
const char *status = json_find_string(a->json, "status");
if (status && strcmp(status, "valid") == 0)
chlg_done = true;
else if (!status || (strcmp(status, "processing") != 0 &&
strcmp(status, "pending") != 0)) {
warnx("challenge %s failed with status %s",
url, status ? status : "unknown");
acme_error(a);
break;
} else if (u < 5*512) {
msg(u > 40 ? 1 : 2, "%s, waiting %u seconds",
status, u);
sleep(u);
} else {
warnx("timeout while polling challenge status at %s, "
"giving up", url);
break;
}
}
if (a->hook && strlen(a->hook) > 0) {
const char *method = chlg_done ? "done" : "failed";
msg(1, "running %s %s %s %s %s %s", a->hook, method,
type, ident_value, token, key_auth);
hook_run(a->hook, method, type, ident_value, token,
key_auth);
}
free(key_auth);
if (!chlg_done)
goto out;
}
}
if (!chlg_done) {
warnx("no challenge completed");
goto out;
}
}
success = true;
out:
json_free(auth);
free(thumbprint);
return success;
}
bool cert_issue(acme_t *a, char * const *names, const char *csr)
{
bool success = false;
char *orderurl = NULL;
char *certfile = NULL;
char *bakfile = NULL;
char *tmpfile = NULL;
char *cert = NULL;
time_t t = time(NULL);
int fd = -1;
char *ids = identifiers(names);
if (!ids) {
warnx("failed to process alternate names");
goto out;
}
const char *url = json_find_string(a->dir, "newOrder");
if (!url) {
warnx("failed to find newOrder URL in directory");
goto out;
}
msg(1, "creating new order at %s", url);
if (acme_post(a, url, ids) != 201)