haproxy/src/acme.c
William Lallemand ae0bc88f91 MINOR: acme: get the challenges object from the Auth URL
This patch implements the retrieval of the challenges objects on the
authorizations URLs. The challenges object contains a token and a
challenge url that need to be called once the challenge is setup.

Each authorization URLs contain multiple challenge objects, usually one
per challenge type (HTTP-01, DNS-01, ALPN-01... We only need to keep the
one that is relevent to our configuration.
2025-04-12 01:29:27 +02:00

1339 lines
35 KiB
C

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Implements the ACMEv2 RFC 8555 protocol
*/
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <import/ebsttree.h>
#include <import/mjson.h>
#include <haproxy/acme-t.h>
#include <haproxy/cli.h>
#include <haproxy/cfgparse.h>
#include <haproxy/errors.h>
#include <haproxy/jws.h>
#include <haproxy/base64.h>
#include <haproxy/cfgparse.h>
#include <haproxy/cli.h>
#include <haproxy/errors.h>
#include <haproxy/http_client.h>
#include <haproxy/jws.h>
#include <haproxy/list.h>
#include <haproxy/ssl_ckch.h>
#include <haproxy/ssl_sock.h>
#include <haproxy/ssl_utils.h>
#include <haproxy/tools.h>
static struct acme_cfg *acme_cfgs = NULL;
static struct acme_cfg *cur_acme = NULL;
/* Return an existing acme_cfg section */
struct acme_cfg *get_acme_cfg(const char *name)
{
struct acme_cfg *tmp_acme = acme_cfgs;
/* first check if the ID was already used */
while (tmp_acme) {
if (strcmp(tmp_acme->name, name) == 0)
return tmp_acme;
tmp_acme = tmp_acme->next;
}
return NULL;
}
/* Return an existing section section OR create one and return it */
struct acme_cfg *new_acme_cfg(const char *name)
{
struct acme_cfg *ret = NULL;
/* first check if the ID was already used. return it if that's the case */
if ((ret = get_acme_cfg(name)) != NULL)
goto out;
/* If there wasn't any section with this name, just create one */
ret = calloc(1, sizeof(*ret));
if (!ret)
return NULL;
ret->name = strdup(name);
/* 0 on the linenum just mean it was not initialized yet */
ret->linenum = 0;
ret->challenge = strdup("HTTP-01"); /* default value */
/* The default generated keys are EC-384 */
ret->key.type = EVP_PKEY_EC;
ret->key.curves = NID_secp384r1;
/* default to 4096 bits when using RSA */
ret->key.bits = 4096;
ret->next = acme_cfgs;
acme_cfgs = ret;
out:
return ret;
}
/*
* ckch_conf acme parser
*/
int ckch_conf_acme_init(void *value, char *buf, struct ckch_data *d, int cli, const char *filename, int linenum, char **err)
{
int err_code = 0;
struct acme_cfg *cfg;
cfg = new_acme_cfg(value);
if (!cfg) {
memprintf(err, "out of memory.\n");
err_code |= ERR_FATAL| ERR_ALERT;
goto error;
}
if (cfg->linenum == 0) {
cfg->filename = strdup(filename);
/* store the linenum as a negative value because is the one of
* the crt-store, not the one of the section. It will be replace
* by the one of the section once initialized
*/
cfg->linenum = -linenum;
}
error:
return err_code;
}
/* acme section parser
* Fill the acme_cfgs linked list
*/
static int cfg_parse_acme(const char *file, int linenum, char **args, int kwm)
{
struct cfg_kw_list *kwl;
const char *best;
int index;
int rc = 0;
int err_code = 0;
char *errmsg = NULL;
if (!experimental_directives_allowed) {
ha_alert("parsing [%s:%d]: section '%s' is experimental, must be allowed via a global 'expose-experimental-directives'\n", file, linenum, cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (strcmp(args[0], "acme") == 0) {
struct acme_cfg *tmp_acme = acme_cfgs;
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (!*args[1]) {
err_code |= ERR_ALERT | ERR_FATAL;
ha_alert("parsing [%s:%d]: section '%s' requires an ID argument.\n", file, linenum, cursection);
goto out;
}
cur_acme = new_acme_cfg(args[1]);
if (!cur_acme) {
err_code |= ERR_ALERT | ERR_FATAL;
ha_alert("parsing [%s:%d]: out of memory.\n", file, linenum);
goto out;
}
/* first check if the ID was already used */
if (cur_acme->linenum > 0) {
/* an unitialized section is created when parsing the "acme" keyword in a crt-store, with a
* linenum <= 0, however, when the linenum > 0, it means we already created a section with this
* name */
err_code |= ERR_ALERT | ERR_FATAL;
ha_alert("parsing [%s:%d]: acme section '%s' already exists (%s:%d).\n",
file, linenum, args[1], tmp_acme->filename, tmp_acme->linenum);
goto out;
}
cur_acme->filename = (char *)file;
cur_acme->linenum = linenum;
goto out;
}
list_for_each_entry(kwl, &cfg_keywords.list, list) {
for (index = 0; kwl->kw[index].kw != NULL; index++) {
if (kwl->kw[index].section != CFG_ACME)
continue;
if (strcmp(kwl->kw[index].kw, args[0]) == 0) {
if (check_kw_experimental(&kwl->kw[index], file, linenum, &errmsg)) {
ha_alert("%s\n", errmsg);
err_code |= ERR_ALERT | ERR_FATAL | ERR_ABORT;
goto out;
}
/* prepare error message just in case */
rc = kwl->kw[index].parse(args, CFG_ACME, NULL, NULL, file, linenum, &errmsg);
if (rc & ERR_ALERT) {
ha_alert("parsing [%s:%d] : %s\n", file, linenum, errmsg);
err_code |= rc;
goto out;
}
else if (rc & ERR_WARN) {
ha_warning("parsing [%s:%d] : %s\n", file, linenum, errmsg);
err_code |= rc;
goto out;
}
goto out;
}
}
}
best = cfg_find_best_match(args[0], &cfg_keywords.list, CFG_ACME, NULL);
if (best)
ha_alert("parsing [%s:%d] : unknown keyword '%s' in '%s' section; did you mean '%s' maybe ?\n", file, linenum, args[0], cursection, best);
else
ha_alert("parsing [%s:%d] : unknown keyword '%s' in '%s' section\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
out:
if (err_code & ERR_FATAL)
err_code |= ERR_ABORT;
free(errmsg);
return err_code;
}
static int cfg_parse_acme_kws(char **args, int section_type, struct proxy *curpx, const struct proxy *defpx,
const char *file, int linenum, char **err)
{
int err_code = 0;
char *errmsg = NULL;
if (strcmp(args[0], "uri") == 0) {
if (!*args[1]) {
ha_alert("parsing [%s:%d]: keyword '%s' in '%s' section requires an argument\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
cur_acme->uri = strdup(args[1]);
if (!cur_acme->uri) {
err_code |= ERR_ALERT | ERR_FATAL;
ha_alert("parsing [%s:%d]: out of memory.\n", file, linenum);
goto out;
}
} else if (strcmp(args[0], "contact") == 0) {
/* save the contact email */
if (!*args[1]) {
ha_alert("parsing [%s:%d]: keyword '%s' in '%s' section requires an argument\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
cur_acme->account.contact = strdup(args[1]);
if (!cur_acme->account.contact) {
err_code |= ERR_ALERT | ERR_FATAL;
ha_alert("parsing [%s:%d]: out of memory.\n", file, linenum);
goto out;
}
} else if (strcmp(args[0], "account") == 0) {
/* save the filename of the account key */
if (!*args[1]) {
ha_alert("parsing [%s:%d]: keyword '%s' in '%s' section requires a filename argument\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(2, file, linenum, args, &err_code))
goto out;
cur_acme->account.file = strdup(args[1]);
if (!cur_acme->account.file) {
err_code |= ERR_ALERT | ERR_FATAL;
ha_alert("parsing [%s:%d]: out of memory.\n", file, linenum);
goto out;
}
} else if (strcmp(args[0], "challenge") == 0) {
if ((!*args[1]) || (strcmp("HTTP-01", args[1]) != 0 && (strcmp("DNS-01", args[1]) != 0))) {
ha_alert("parsing [%s:%d]: keyword '%s' in '%s' section requires a challenge type: HTTP-01 or DNS-01\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(2, file, linenum, args, &err_code))
goto out;
cur_acme->challenge = strdup(args[1]);
if (!cur_acme->challenge) {
err_code |= ERR_ALERT | ERR_FATAL;
ha_alert("parsing [%s:%d]: out of memory.\n", file, linenum);
goto out;
}
} else if (*args[0] != 0) {
ha_alert("parsing [%s:%d]: unknown keyword '%s' in '%s' section\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
out:
free(errmsg);
return err_code;
}
static int cfg_parse_acme_cfg_key(char **args, int section_type, struct proxy *curpx, const struct proxy *defpx,
const char *file, int linenum, char **err)
{
int err_code = 0;
char *errmsg = NULL;
if (strcmp(args[0], "keytype") == 0) {
if (!*args[1]) {
ha_alert("parsing [%s:%d]: keyword '%s' in '%s' section requires an argument\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (strcmp(args[1], "RSA") == 0) {
cur_acme->key.type = EVP_PKEY_RSA;
} else if (strcmp(args[1], "ECDSA") == 0) {
cur_acme->key.type = EVP_PKEY_EC;
} else {
ha_alert("parsing [%s:%d]: keyword '%s' in '%s' section requires either 'RSA' or 'ECDSA' argument\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
} else if (strcmp(args[0], "bits") == 0) {
char *stop;
if (!*args[1]) {
ha_alert("parsing [%s:%d]: keyword '%s' in '%s' section requires an argument\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
cur_acme->key.bits = strtol(args[1], &stop, 10);
if (*stop != '\0') {
err_code |= ERR_ALERT | ERR_FATAL;
ha_alert("parsing [%s:%d] : cannot parse '%s' value '%s', an integer is expected.\n", file, linenum, args[0], args[1]);
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
} else if (strcmp(args[0], "curves") == 0) {
if (!*args[1]) {
ha_alert("parsing [%s:%d]: keyword '%s' in '%s' section requires an argument\n", file, linenum, args[0], cursection);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if ((cur_acme->key.curves = curves2nid(args[1])) == -1) {
ha_alert("parsing [%s:%d]: unsupported curves '%s'\n", file, linenum, args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
out:
free(errmsg);
return err_code;
}
/* Initialize stuff once the section is parsed */
static int cfg_postsection_acme()
{
struct acme_cfg *cur_acme = acme_cfgs;
struct ckch_store *store;
int err_code = 0;
char *errmsg = NULL;
char *path;
struct stat st;
/* TODO: generate a key at startup and dumps on the filesystem
* TODO: use the standard ckch loading for the account key (need a store with only a key)
*/
/* if account key filename is unspecified, choose a filename for it */
if (!cur_acme->account.file) {
if (!memprintf(&cur_acme->account.file, "%s.account.key", cur_acme->name)) {
err_code |= ERR_ALERT | ERR_FATAL | ERR_ABORT;
ha_alert("acme: out of memory.\n");
goto out;
}
}
path = cur_acme->account.file;
store = ckch_store_new(path);
if (!store) {
ha_alert("acme: out of memory.\n");
err_code |= ERR_ALERT | ERR_FATAL | ERR_ABORT;
goto out;
}
/* tries to open the account key */
if (stat(path, &st) == 0) {
if (ssl_sock_load_key_into_ckch(path, NULL, store->data, &errmsg)) {
memprintf(&errmsg, "%s'%s' is present but cannot be read or parsed.\n", errmsg && *errmsg ? errmsg : NULL, path);
if (errmsg && *errmsg)
indent_msg(&errmsg, 8);
err_code |= ERR_ALERT | ERR_FATAL | ERR_ABORT;
ha_alert("acme: %s\n", errmsg);
goto out;
}
/* ha_notice("acme: reading account key '%s' for id '%s'.\n", path, cur_acme->name); */
} else {
ha_alert("%s '%s' is not present and can't be generated, please provide an account file.\n", errmsg, path);
err_code |= ERR_ALERT | ERR_FATAL | ERR_ABORT;
goto out;
}
if (store->data->key == NULL) {
ha_alert("acme: No Private Key found in '%s'.\n", path);
err_code |= ERR_ALERT | ERR_FATAL | ERR_ABORT;
goto out;
}
cur_acme->account.pkey = store->data->key;
trash.data = jws_thumbprint(cur_acme->account.pkey, trash.area, trash.size);
cur_acme->account.thumbprint = strndup(trash.area, trash.data);
if (!cur_acme->account.thumbprint) {
ha_alert("acme: out of memory.\n");
err_code |= ERR_ALERT | ERR_FATAL | ERR_ABORT;
goto out;
}
/* insert into the ckchs tree */
ebst_insert(&ckchs_tree, &store->node);
out:
ha_free(&errmsg);
return err_code;
}
/* postparser function checks if the ACME section was declared */
static int cfg_postparser_acme()
{
struct acme_cfg *tmp_acme = acme_cfgs;
int ret = 0;
/* first check if the ID was already used */
while (tmp_acme) {
/* if the linenum is not > 0, it means the acme keyword was used without declaring a section, and the
* linenum of the crt-store is stored negatively */
if (tmp_acme->linenum <= 0) {
ret++;
ha_alert("acme '%s' was used on a crt line [%s:%d], but no '%s' section exists!\n",
tmp_acme->name, tmp_acme->filename, -tmp_acme->linenum, tmp_acme->name);
}
tmp_acme = tmp_acme->next;
}
return ret;
}
REGISTER_CONFIG_POSTPARSER("acme", cfg_postparser_acme);
void deinit_acme()
{
struct acme_cfg *next = NULL;
while (acme_cfgs) {
next = acme_cfgs->next;
ha_free(&acme_cfgs->name);
ha_free(&acme_cfgs->uri);
ha_free(&acme_cfgs->account.contact);
ha_free(&acme_cfgs->account.file);
ha_free(&acme_cfgs->account.thumbprint);
free(acme_cfgs);
acme_cfgs = next;
}
}
static struct cfg_kw_list cfg_kws_acme = {ILH, {
{ CFG_ACME, "uri", cfg_parse_acme_kws },
{ CFG_ACME, "contact", cfg_parse_acme_kws },
{ CFG_ACME, "account", cfg_parse_acme_kws },
{ CFG_ACME, "challenge", cfg_parse_acme_kws },
{ CFG_ACME, "keytype", cfg_parse_acme_cfg_key },
{ CFG_ACME, "bits", cfg_parse_acme_cfg_key },
{ CFG_ACME, "curves", cfg_parse_acme_cfg_key },
{ 0, NULL, NULL },
}};
INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws_acme);
REGISTER_CONFIG_SECTION("acme", cfg_parse_acme, cfg_postsection_acme);
static void acme_httpclient_end(struct httpclient *hc)
{
struct task *task = hc->caller;
struct acme_ctx *ctx = task->context;
if (!task)
return;
if (ctx->http_state == ACME_HTTP_REQ)
ctx->http_state = ACME_HTTP_RES;
task_wakeup(task, TASK_WOKEN_MSG);
}
int acme_http_req(struct task *task, struct acme_ctx *ctx, struct ist url, enum http_meth_t meth, const struct http_hdr *hdrs, struct ist payload)
{
struct httpclient *hc;
hc = httpclient_new(task, meth, url);
if (!hc)
goto error;
if (httpclient_req_gen(hc, hc->req.url, hc->req.meth, hdrs, payload) != ERR_NONE)
goto error;
hc->ops.res_end = acme_httpclient_end;
ctx->hc = hc;
if (!httpclient_start(hc))
goto error;
return 0;
error:
httpclient_destroy(hc);
ctx->hc = NULL;
return 1;
}
int acme_jws_payload(struct buffer *req, struct ist nonce, struct ist url, EVP_PKEY *pkey, struct ist kid, struct buffer *output, char **errmsg)
{
struct buffer *b64payload = NULL;
struct buffer *b64prot = NULL;
struct buffer *b64sign = NULL;
struct buffer *jwk = NULL;
enum jwt_alg alg = JWS_ALG_NONE;
int ret = 1;
b64payload = alloc_trash_chunk();
b64prot = alloc_trash_chunk();
jwk = alloc_trash_chunk();
b64sign = alloc_trash_chunk();
if (!b64payload || !b64prot || !jwk || !b64sign || !output) {
memprintf(errmsg, "out of memory");
goto error;
}
if (!isttest(kid))
jwk->data = EVP_PKEY_to_pub_jwk(pkey, jwk->area, jwk->size);
alg = EVP_PKEY_to_jws_alg(pkey);
if (alg == JWS_ALG_NONE) {
memprintf(errmsg, "couldn't chose a JWK algorithm");
goto error;
}
b64payload->data = jws_b64_payload(req->area, b64payload->area, b64payload->size);
b64prot->data = jws_b64_protected(alg, kid.ptr, jwk->area, nonce.ptr, url.ptr, b64prot->area, b64prot->size);
b64sign->data = jws_b64_signature(pkey, alg, b64prot->area, b64payload->area, b64sign->area, b64sign->size);
output->data = jws_flattened(b64prot->area, b64payload->area, b64sign->area, output->area, output->size);
if (output->data == 0)
goto error;
ret = 0;
error:
free_trash_chunk(b64sign);
free_trash_chunk(jwk);
free_trash_chunk(b64prot);
free_trash_chunk(b64payload);
return ret;
}
/*
* Get an Auth URL
*/
int acme_req_auth(struct task *task, struct acme_ctx *ctx, struct acme_auth *auth, char **errmsg)
{
struct buffer *req_in = NULL;
struct buffer *req_out = NULL;
const struct http_hdr hdrs[] = {
{ IST("Content-Type"), IST("application/jose+json") },
{ IST_NULL, IST_NULL }
};
int ret = 1;
if ((req_in = alloc_trash_chunk()) == NULL)
goto error;
if ((req_out = alloc_trash_chunk()) == NULL)
goto error;
/* empty payload */
if (acme_jws_payload(req_in, ctx->nonce, auth->auth, ctx->cfg->account.pkey, ctx->kid, req_out, errmsg) != 0)
goto error;
if (acme_http_req(task, ctx, auth->auth, HTTP_METH_POST, hdrs, ist2(req_out->area, req_out->data)))
goto error;
ret = 0;
error:
memprintf(errmsg, "couldn't generate the Authorizations request");
free_trash_chunk(req_in);
free_trash_chunk(req_out);
return ret;
}
int acme_res_auth(struct task *task, struct acme_ctx *ctx, struct acme_auth *auth, char **errmsg)
{
struct httpclient *hc;
struct http_hdr *hdrs, *hdr;
struct buffer *t1 = NULL, *t2 = NULL;
int ret = 1;
int i;
hc = ctx->hc;
if (!hc)
goto error;
if ((t1 = alloc_trash_chunk()) == NULL)
goto error;
if ((t2 = alloc_trash_chunk()) == NULL)
goto error;
hdrs = hc->res.hdrs;
for (hdr = hdrs; isttest(hdr->v); hdr++) {
if (isteqi(hdr->n, ist("Replay-Nonce"))) {
istfree(&ctx->nonce);
ctx->nonce = istdup(hdr->v);
}
}
if (hc->res.status < 200 || hc->res.status >= 300) {
/* XXX: need a generic URN error parser */
if ((ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, "$.detail", t1->area, t1->size)) > -1)
t1->data = ret;
if ((ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, "$.type", t2->area, t2->size)) > -1)
t2->data = ret;
if (t2->data && t1->data)
memprintf(errmsg, "invalid HTTP status code %d when getting Authorization URL: \"%.*s\" (%.*s)", hc->res.status, (int)t1->data, t1->area, (int)t2->data, t2->area);
else
memprintf(errmsg, "invalid HTTP status code %d when getting Authorization URL", hc->res.status);
goto error;
}
/* get the multiple challenges and select the one from the configuration */
for (i = 0; ; i++) {
int ret;
char chall[] = "$.challenges[XXX]";
const char *tokptr;
int toklen;
if (snprintf(chall, sizeof(chall), "$.challenges[%d]", i) >= sizeof(chall))
goto error;
/* break the loop at the end of the challenges objects list */
if (mjson_find(hc->res.buf.area, hc->res.buf.data, chall, &tokptr, &toklen) == MJSON_TOK_INVALID)
break;
ret = mjson_get_string(tokptr, toklen, "$.type", trash.area, trash.size);
if (ret == -1) {
memprintf(errmsg, "couldn't get a challenge type in challenges[%d] from Authorization URL \"%s\"", i, auth->auth.ptr);
goto error;
}
trash.data = ret;
/* skip until this is the challenge we need */
if (strncasecmp(ctx->cfg->challenge, trash.area, trash.data) != 0)
continue;
ret = mjson_get_string(tokptr, toklen, "$.url", trash.area, trash.size);
if (ret == -1) {
memprintf(errmsg, "couldn't get a challenge URL in challenges[%d] from Authorization URL \"%s\"", i, auth->auth.ptr);
goto error;
}
trash.data = ret;
auth->chall = istdup(ist2(trash.area, trash.data));
if (!isttest(auth->chall)) {
memprintf(errmsg, "out of memory");
goto error;
}
ret = mjson_get_string(tokptr, toklen, "$.token", trash.area, trash.size);
if (ret == -1) {
memprintf(errmsg, "couldn't get a token in challenges[%d] from Authorization URL \"%s\"", i, auth->auth.ptr);
goto error;
}
trash.data = ret;
auth->token = istdup(ist2(trash.area, trash.data));
if (!isttest(auth->token)) {
memprintf(errmsg, "out of memory");
goto error;
}
/* we only need one challenge, and iteration is only used to found the right one */
break;
}
out:
ret = 0;
error:
free_trash_chunk(t1);
free_trash_chunk(t2);
httpclient_destroy(hc);
ctx->hc = NULL;
return ret;
}
int acme_req_neworder(struct task *task, struct acme_ctx *ctx, char **errmsg)
{
struct buffer *req_in = NULL;
struct buffer *req_out = NULL;
const struct http_hdr hdrs[] = {
{ IST("Content-Type"), IST("application/jose+json") },
{ IST_NULL, IST_NULL }
};
int ret = 1;
char **san = ctx->store->conf.acme.domains;
if ((req_in = alloc_trash_chunk()) == NULL)
goto error;
if ((req_out = alloc_trash_chunk()) == NULL)
goto error;
chunk_printf(req_in, "{ \"identifiers\": [ ");
if (!san)
goto error;
for (; san && *san; san++) {
// fprintf(stderr, "%s:%d %s\n", __FUNCTION__, __LINE__, *san);
chunk_appendf(req_in, "%s{ \"type\": \"dns\", \"value\": \"%s\" }", (*san == *ctx->store->conf.acme.domains) ? "" : ",", *san);
}
chunk_appendf(req_in, " ] }");
if (acme_jws_payload(req_in, ctx->nonce, ctx->ressources.newOrder, ctx->cfg->account.pkey, ctx->kid, req_out, errmsg) != 0)
goto error;
if (acme_http_req(task, ctx, ctx->ressources.newOrder, HTTP_METH_POST, hdrs, ist2(req_out->area, req_out->data)))
goto error;
ret = 0;
error:
memprintf(errmsg, "couldn't generate the newOrder request");
free_trash_chunk(req_in);
free_trash_chunk(req_out);
return ret;
}
int acme_res_neworder(struct task *task, struct acme_ctx *ctx, char **errmsg)
{
struct httpclient *hc;
struct http_hdr *hdrs, *hdr;
struct buffer *t1 = NULL, *t2 = NULL;
int ret = 1;
int i;
hc = ctx->hc;
if (!hc)
goto error;
if ((t1 = alloc_trash_chunk()) == NULL)
goto error;
if ((t2 = alloc_trash_chunk()) == NULL)
goto error;
hdrs = hc->res.hdrs;
for (hdr = hdrs; isttest(hdr->v); hdr++) {
if (isteqi(hdr->n, ist("Replay-Nonce"))) {
istfree(&ctx->nonce);
ctx->nonce = istdup(hdr->v);
}
/* get the order URL */
if (isteqi(hdr->n, ist("Location"))) {
istfree(&ctx->order);
ctx->order = istdup(hdr->v);
}
}
if (hc->res.status < 200 || hc->res.status >= 300) {
if ((ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, "$.detail", t1->area, t1->size)) > -1)
t1->data = ret;
if ((ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, "$.type", t2->area, t2->size)) > -1)
t2->data = ret;
if (t2->data && t1->data)
memprintf(errmsg, "invalid HTTP status code %d when getting newOrder URL: \"%.*s\" (%.*s)", hc->res.status, (int)t1->data, t1->area, (int)t2->data, t2->area);
else
memprintf(errmsg, "invalid HTTP status code %d when getting newOrder URL", hc->res.status);
goto error;
}
if (!isttest(ctx->order)) {
memprintf(errmsg, "couldn't get an order Location during newOrder");
goto error;
}
/* get the multiple authorizations URL and tokens */
for (i = 0; ; i++) {
struct acme_auth *auth;
char url[] = "$.authorizations[XXX]";
if (snprintf(url, sizeof(url), "$.authorizations[%d]", i) >= sizeof(url)) {
memprintf(errmsg, "couldn't loop on authorizations during newOrder");
goto error;
}
ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, url, trash.area, trash.size);
if (ret == -1) /* end of the authorizations array */
break;
trash.data = ret;
if ((auth = calloc(1, sizeof(*auth))) == NULL) {
memprintf(errmsg, "out of memory");
goto error;
}
auth->auth = istdup(ist2(trash.area, trash.data));
if (!isttest(auth->auth)) {
memprintf(errmsg, "out of memory");
goto error;
}
auth->next = ctx->auths;
ctx->auths = auth;
ctx->next_auth = auth;
}
out:
ret = 0;
error:
free_trash_chunk(t1);
free_trash_chunk(t2);
httpclient_destroy(hc);
ctx->hc = NULL;
return ret;
}
int acme_req_account(struct task *task, struct acme_ctx *ctx, int newaccount, char **errmsg)
{
struct buffer *req_in = NULL;
struct buffer *req_out = NULL;
const struct http_hdr hdrs[] = {
{ IST("Content-Type"), IST("application/jose+json") },
{ IST_NULL, IST_NULL }
};
char *accountreq = "{\n"
" \"termsOfServiceAgreed\": true,\n"
" \"onlyReturnExisting\": true\n"
"}\n";
char *newaccountreq = "{\n"
" \"termsOfServiceAgreed\": true,\n"
" \"contact\": [\n"
" \"mailto:%s\"\n"
" ]\n"
"}\n";
int ret = 1;
if ((req_in = alloc_trash_chunk()) == NULL)
goto error;
if ((req_out = alloc_trash_chunk()) == NULL)
goto error;
if (newaccount)
chunk_printf(req_in, newaccountreq, ctx->cfg->account.contact);
else
chunk_printf(req_in, "%s", accountreq);
if (acme_jws_payload(req_in, ctx->nonce, ctx->ressources.newAccount, ctx->cfg->account.pkey, ctx->kid, req_out, errmsg) != 0)
goto error;
if (acme_http_req(task, ctx, ctx->ressources.newAccount, HTTP_METH_POST, hdrs, ist2(req_out->area, req_out->data)))
goto error;
ret = 0;
error:
memprintf(errmsg, "couldn't generate the newAccount request");
free_trash_chunk(req_in);
free_trash_chunk(req_out);
return ret;
}
int acme_res_account(struct task *task, struct acme_ctx *ctx, int newaccount, char **errmsg)
{
struct httpclient *hc;
struct http_hdr *hdrs, *hdr;
struct buffer *t1 = NULL, *t2 = NULL;
int ret = 1;
hc = ctx->hc;
if (!hc)
goto error;
if ((t1 = alloc_trash_chunk()) == NULL)
goto error;
if ((t2 = alloc_trash_chunk()) == NULL)
goto error;
hdrs = hc->res.hdrs;
for (hdr = hdrs; isttest(hdr->v); hdr++) {
if (isteqi(hdr->n, ist("Location"))) {
istfree(&ctx->kid);
ctx->kid = istdup(hdr->v);
}
if (isteqi(hdr->n, ist("Replay-Nonce"))) {
istfree(&ctx->nonce);
ctx->nonce = istdup(hdr->v);
}
}
if (hc->res.status < 200 || hc->res.status >= 300) {
if ((ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, "$.detail", t1->area, t1->size)) > -1)
t1->data = ret;
if ((ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, "$.type", t2->area, t2->size)) > -1)
t2->data = ret;
if (!newaccount) {
/* not an error, we only need to create a new account */
if (strcmp("urn:ietf:params:acme:error:accountDoesNotExist", t2->area) == 0)
goto out;
}
if (t2->data && t1->data)
memprintf(errmsg, "invalid HTTP status code %d when getting Account URL: \"%.*s\" (%.*s)", hc->res.status, (int)t1->data, t1->area, (int)t2->data, t2->area);
else
memprintf(errmsg, "invalid HTTP status code %d when getting Account URL", hc->res.status);
goto error;
}
out:
ret = 0;
error:
free_trash_chunk(t1);
free_trash_chunk(t2);
httpclient_destroy(hc);
ctx->hc = NULL;
return ret;
}
int acme_nonce(struct task *task, struct acme_ctx *ctx, char **errmsg)
{
struct httpclient *hc;
struct http_hdr *hdrs, *hdr;
hc = ctx->hc;
if (!hc)
goto error;
if (hc->res.status < 200 || hc->res.status >= 300) {
memprintf(errmsg, "invalid HTTP status code %d when getting Nonce URL", hc->res.status);
goto error;
}
hdrs = hc->res.hdrs;
for (hdr = hdrs; isttest(hdr->v); hdr++) {
if (isteqi(hdr->n, ist("Replay-Nonce"))) {
istfree(&ctx->nonce);
ctx->nonce = istdup(hdr->v);
// fprintf(stderr, "Replay-Nonce: %.*s\n", (int)hdr->v.len, hdr->v.ptr);
}
}
httpclient_destroy(hc);
ctx->hc = NULL;
return 0;
error:
httpclient_destroy(hc);
ctx->hc = NULL;
return 1;
}
int acme_directory(struct task *task, struct acme_ctx *ctx, char **errmsg)
{
struct httpclient *hc;
int ret = 0;
hc = ctx->hc;
if (!hc)
goto error;
if (hc->res.status != 200) {
memprintf(errmsg, "invalid HTTP status code %d when getting directory URL", hc->res.status);
goto error;
}
if ((ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, "$.newNonce", trash.area, trash.size)) <= 0) {
memprintf(errmsg, "couldn't get newNonce URL from the directory URL");
goto error;
}
ctx->ressources.newNonce = istdup(ist2(trash.area, ret));
if (!isttest(ctx->ressources.newNonce)) {
memprintf(errmsg, "couldn't get newNonce URL from the directory URL");
goto error;
}
if ((ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, "$.newAccount", trash.area, trash.size)) <= 0) {
memprintf(errmsg, "couldn't get newAccount URL from the directory URL");
goto error;
}
ctx->ressources.newAccount = istdup(ist2(trash.area, ret));
if (!isttest(ctx->ressources.newAccount)) {
memprintf(errmsg, "couldn't get newAccount URL from the directory URL");
goto error;
}
if ((ret = mjson_get_string(hc->res.buf.area, hc->res.buf.data, "$.newOrder", trash.area, trash.size)) <= 0) {
memprintf(errmsg, "couldn't get newOrder URL from the directory URL");
goto error;
}
ctx->ressources.newOrder = istdup(ist2(trash.area, ret));
if (!isttest(ctx->ressources.newOrder)) {
memprintf(errmsg, "couldn't get newOrder URL from the directory URL");
goto error;
}
httpclient_destroy(hc);
ctx->hc = NULL;
// fprintf(stderr, "newNonce: %s\nnewAccount: %s\nnewOrder: %s\n",
// ctx->ressources.newNonce.ptr, ctx->ressources.newAccount.ptr, ctx->ressources.newOrder.ptr);
return 0;
error:
httpclient_destroy(hc);
ctx->hc = NULL;
istfree(&ctx->ressources.newNonce);
istfree(&ctx->ressources.newAccount);
istfree(&ctx->ressources.newOrder);
return 1;
}
/*
* Task for ACME processing:
* - when retrying after a failure, the task must be waked up
* - when calling a get function, the httpclient is waking up the task again
* once the data are ready or upon failure
*/
struct task *acme_process(struct task *task, void *context, unsigned int state)
{
struct acme_ctx *ctx = task->context;
enum acme_st st = ctx->state;
enum http_st http_st = ctx->http_state;
char *errmsg = NULL;
switch (st) {
case ACME_RESSOURCES:
if (http_st == ACME_HTTP_REQ) {
if (acme_http_req(task, ctx, ist(ctx->cfg->uri), HTTP_METH_GET, NULL, IST_NULL) != 0)
goto retry;
}
if (http_st == ACME_HTTP_RES) {
if (acme_directory(task, ctx, &errmsg) != 0) {
http_st = ACME_HTTP_REQ;
goto retry;
}
st = ACME_NEWNONCE;
http_st = ACME_HTTP_REQ;
task_wakeup(task, TASK_WOKEN_MSG);
}
break;
case ACME_NEWNONCE:
if (http_st == ACME_HTTP_REQ) {
if (acme_http_req(task, ctx, ctx->ressources.newNonce, HTTP_METH_HEAD, NULL, IST_NULL) != 0)
goto retry;
}
if (http_st == ACME_HTTP_RES) {
if (acme_nonce(task, ctx, &errmsg) != 0) {
http_st = ACME_HTTP_REQ;
goto retry;
}
st = ACME_CHKACCOUNT;
http_st = ACME_HTTP_REQ;
task_wakeup(task, TASK_WOKEN_MSG);
}
break;
case ACME_CHKACCOUNT:
if (http_st == ACME_HTTP_REQ) {
if (acme_req_account(task, ctx, 0, &errmsg) != 0)
goto retry;
}
if (http_st == ACME_HTTP_RES) {
if (acme_res_account(task, ctx, 0, &errmsg) != 0) {
http_st = ACME_HTTP_REQ;
goto retry;
}
if (!isttest(ctx->kid))
st = ACME_NEWACCOUNT;
else
st = ACME_NEWORDER;
http_st = ACME_HTTP_REQ;
task_wakeup(task, TASK_WOKEN_MSG);
}
break;
case ACME_NEWACCOUNT:
if (http_st == ACME_HTTP_REQ) {
if (acme_req_account(task, ctx, 1, &errmsg) != 0)
goto retry;
}
if (http_st == ACME_HTTP_RES) {
if (acme_res_account(task, ctx, 1, &errmsg) != 0) {
http_st = ACME_HTTP_REQ;
goto retry;
}
st = ACME_NEWORDER;
http_st = ACME_HTTP_REQ;
task_wakeup(task, TASK_WOKEN_MSG);
goto end;
}
break;
case ACME_NEWORDER:
if (http_st == ACME_HTTP_REQ) {
if (acme_req_neworder(task, ctx, &errmsg) != 0)
goto retry;
}
if (http_st == ACME_HTTP_RES) {
if (acme_res_neworder(task, ctx, &errmsg) != 0) {
http_st = ACME_HTTP_REQ;
goto retry;
}
st = ACME_AUTH;
http_st = ACME_HTTP_REQ;
task_wakeup(task, TASK_WOKEN_MSG);
}
break;
case ACME_AUTH:
if (http_st == ACME_HTTP_REQ) {
if (acme_req_auth(task, ctx, ctx->next_auth, &errmsg) != 0)
goto retry;
}
if (http_st == ACME_HTTP_RES) {
if (acme_res_auth(task, ctx, ctx->next_auth, &errmsg) != 0) {
http_st = ACME_HTTP_REQ;
goto retry;
}
if ((ctx->next_auth = ctx->next_auth->next) == NULL)
goto end;
http_st = ACME_HTTP_REQ;
task_wakeup(task, TASK_WOKEN_MSG);
}
break;
default:
break;
}
ctx->http_state = http_st;
ctx->state = st;
return task;
retry:
ctx->http_state = http_st;
ctx->state = st;
ctx->retries--;
if (ctx->retries > 0) {
ha_notice("acme: %s, retrying (%d/%d)...\n", errmsg ? errmsg : "", ACME_RETRY-ctx->retries, ACME_RETRY);
task_wakeup(task, TASK_WOKEN_MSG);
} else {
ha_notice("acme: %s, aborting. (%d/%d)\n", errmsg ? errmsg : "", ACME_RETRY-ctx->retries, ACME_RETRY);
goto end;
}
ha_free(&errmsg);
return task;
end:
task_destroy(task);
task = NULL;
return task;
}
static int cli_acme_renew_parse(char **args, char *payload, struct appctx *appctx, void *private)
{
char *err = NULL;
struct acme_cfg *cfg;
struct task *task;
struct acme_ctx *ctx = NULL;
struct ckch_store *store = NULL, *newstore = NULL;
EVP_PKEY_CTX *pkey_ctx = NULL;
EVP_PKEY *pkey = NULL;
if (!*args[1]) {
memprintf(&err, ": not enough parameters\n");
goto err;
}
if (HA_SPIN_TRYLOCK(CKCH_LOCK, &ckch_lock))
return cli_err(appctx, "Can't update: operations on certificates are currently locked!\n");
if ((store = ckchs_lookup(args[2])) == NULL) {
memprintf(&err, "Can't find the certificate '%s'.\n", args[1]);
goto err;
}
if (store->conf.acme.id == NULL) {
memprintf(&err, "No ACME configuration defined for file '%s'.\n", args[1]);
goto err;
}
cfg = get_acme_cfg(store->conf.acme.id);
if (!cfg) {
memprintf(&err, "No ACME configuration found for file '%s'.\n", args[1]);
goto err;
}
newstore = ckch_store_new(store->path);
if (!newstore) {
memprintf(&err, "Out of memory.\n");
goto err;
}
HA_SPIN_UNLOCK(CKCH_LOCK, &ckch_lock);
ctx = calloc(1, sizeof *ctx);
if (!ctx) {
memprintf(&err, "Out of memory.\n");
goto err;
}
/* set the number of remaining retries when facing an error */
ctx->retries = ACME_RETRY;
if ((pkey_ctx = EVP_PKEY_CTX_new_id(cfg->key.type, NULL)) == NULL) {
memprintf(&err, "%sCan't generate a private key.\n", err ? err : "");
goto err;
}
if (EVP_PKEY_keygen_init(pkey_ctx) <= 0) {
memprintf(&err, "%sCan't generate a private key.\n", err ? err : "");
goto err;
}
if (cfg->key.type == EVP_PKEY_EC) {
if (EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pkey_ctx, cfg->key.curves) <= 0) {
memprintf(&err, "%sCan't set the curves on the new private key.\n", err ? err : "");
goto err;
}
} else if (cfg->key.type == EVP_PKEY_RSA) {
if (EVP_PKEY_CTX_set_rsa_keygen_bits(pkey_ctx, cfg->key.bits) <= 0) {
memprintf(&err, "%sCan't set the bits on the new private key.\n", err ? err : "");
goto err;
}
}
if (EVP_PKEY_keygen(pkey_ctx, &pkey) <= 0) {
memprintf(&err, "%sCan't generate a private key.\n", err ? err : "");
goto err;
}
EVP_PKEY_CTX_free(pkey_ctx);
newstore->data->key = pkey;
/* XXX: must implement a real copy */
newstore->conf = store->conf;
ctx->store = newstore;
ctx->cfg = cfg;
task = task_new_anywhere();
if (!task)
goto err;
task->nice = 0;
task->process = acme_process;
task->context = ctx;
task_wakeup(task, TASK_WOKEN_INIT);
return 0;
err:
HA_SPIN_UNLOCK(CKCH_LOCK, &ckch_lock);
ckch_store_free(newstore);
EVP_PKEY_CTX_free(pkey_ctx);
free(ctx);
memprintf(&err, "%sCan't start the ACME client.\n", err ? err : "");
return cli_dynerr(appctx, err);
}
static struct cli_kw_list cli_kws = {{ },{
{ { "acme", "renew", NULL }, NULL, cli_acme_renew_parse, NULL, NULL, NULL, 0 },
{ { NULL }, NULL, NULL, NULL }
}};
INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws);
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/