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| -rw-r--r-- | modules/md/md_acme.h | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/modules/md/md_acme.h b/modules/md/md_acme.h new file mode 100644 index 0000000..f28f2b6 --- /dev/null +++ b/modules/md/md_acme.h @@ -0,0 +1,317 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef mod_md_md_acme_h +#define mod_md_md_acme_h + +struct apr_array_header_t; +struct apr_bucket_brigade; +struct md_http_response_t; +struct apr_hash_t; +struct md_http_t; +struct md_json_t; +struct md_pkey_t; +struct md_t; +struct md_acme_acct_t; +struct md_acmev2_acct_t; +struct md_store_t; +struct md_result_t; + +#define MD_PROTO_ACME "ACME" + +#define MD_AUTHZ_CHA_HTTP_01 "http-01" +#define MD_AUTHZ_CHA_SNI_01 "tls-sni-01" + +#define MD_ACME_VERSION_UNKNOWN 0x0 +#define MD_ACME_VERSION_1 0x010000 +#define MD_ACME_VERSION_2 0x020000 + +#define MD_ACME_VERSION_MAJOR(i) (((i)&0xFF0000) >> 16) + +typedef enum { + MD_ACME_S_UNKNOWN, /* MD has not been analysed yet */ + MD_ACME_S_REGISTERED, /* MD is registered at CA, but not more */ + MD_ACME_S_TOS_ACCEPTED, /* Terms of Service were accepted by account holder */ + MD_ACME_S_CHALLENGED, /* MD challenge information for all domains is known */ + MD_ACME_S_VALIDATED, /* MD domains have been validated */ + MD_ACME_S_CERTIFIED, /* MD has valid certificate */ + MD_ACME_S_DENIED, /* MD domains (at least one) have been denied by CA */ +} md_acme_state_t; + +typedef struct md_acme_t md_acme_t; + +typedef struct md_acme_req_t md_acme_req_t; +/** + * Request callback on a successful HTTP response (status 2xx). + */ +typedef apr_status_t md_acme_req_res_cb(md_acme_t *acme, + const struct md_http_response_t *res, void *baton); + +/** + * Request callback to initialize before sending. May be invoked more than once in + * case of retries. + */ +typedef apr_status_t md_acme_req_init_cb(md_acme_req_t *req, void *baton); + +/** + * Request callback on a successful response (HTTP response code 2xx) and content + * type matching application/.*json. + */ +typedef apr_status_t md_acme_req_json_cb(md_acme_t *acme, apr_pool_t *p, + const apr_table_t *headers, + struct md_json_t *jbody, void *baton); + +/** + * Request callback on detected errors. + */ +typedef apr_status_t md_acme_req_err_cb(md_acme_req_t *req, + const struct md_result_t *result, void *baton); + + +typedef apr_status_t md_acme_new_nonce_fn(md_acme_t *acme); +typedef apr_status_t md_acme_req_init_fn(md_acme_req_t *req, struct md_json_t *jpayload); + +typedef apr_status_t md_acme_post_fn(md_acme_t *acme, + md_acme_req_init_cb *on_init, + md_acme_req_json_cb *on_json, + md_acme_req_res_cb *on_res, + md_acme_req_err_cb *on_err, + void *baton); + +struct md_acme_t { + const char *url; /* directory url of the ACME service */ + const char *sname; /* short name for the service, not necessarily unique */ + apr_pool_t *p; + const char *user_agent; + const char *proxy_url; + const char *ca_file; + + const char *acct_id; /* local storage id account was loaded from or NULL */ + struct md_acme_acct_t *acct; /* account at ACME server to use for requests */ + struct md_pkey_t *acct_key; /* private RSA key belonging to account */ + + int version; /* as detected from the server */ + union { + struct { /* obsolete */ + const char *new_authz; + const char *new_cert; + const char *new_reg; + const char *revoke_cert; + + } v1; + struct { + const char *new_account; + const char *new_order; + const char *key_change; + const char *revoke_cert; + const char *new_nonce; + } v2; + } api; + const char *ca_agreement; + const char *acct_name; + int eab_required; + + md_acme_new_nonce_fn *new_nonce_fn; + md_acme_req_init_fn *req_init_fn; + md_acme_post_fn *post_new_account_fn; + + struct md_http_t *http; + + const char *nonce; + int max_retries; + struct md_result_t *last; /* result of last request */ +}; + +/** + * Global init, call once at start up. + */ +apr_status_t md_acme_init(apr_pool_t *pool, const char *base_version, int init_ssl); + +/** + * Create a new ACME server instance. If path is not NULL, will use that directory + * for persisting information. Will load any information persisted in earlier session. + * url needs only be specified for instances where this has never been persisted before. + * + * @param pacme will hold the ACME server instance on success + * @param p pool to used + * @param url url of the server, optional if known at path + * @param proxy_url optional url of a HTTP(S) proxy to use + */ +apr_status_t md_acme_create(md_acme_t **pacme, apr_pool_t *p, const char *url, + const char *proxy_url, const char *ca_file); + +/** + * Contact the ACME server and retrieve its directory information. + * + * @param acme the ACME server to contact + */ +apr_status_t md_acme_setup(md_acme_t *acme, struct md_result_t *result); + +void md_acme_report_result(md_acme_t *acme, apr_status_t rv, struct md_result_t *result); + +/**************************************************************************************************/ +/* account handling */ + +/** + * Clear any existing account data from acme instance. + */ +void md_acme_clear_acct(md_acme_t *acme); + +apr_status_t md_acme_POST_new_account(md_acme_t *acme, + md_acme_req_init_cb *on_init, + md_acme_req_json_cb *on_json, + md_acme_req_res_cb *on_res, + md_acme_req_err_cb *on_err, + void *baton); + +/** + * Get the local name of the account currently used by the acme instance. + * Will be NULL if no account has been setup successfully. + */ +const char *md_acme_acct_id_get(md_acme_t *acme); +const char *md_acme_acct_url_get(md_acme_t *acme); + +/** + * Specify the account to use by name in local store. On success, the account + * is the "current" one used by the acme instance. + * @param acme the acme instance to set the account for + * @param store the store to load accounts from + * @param p pool for allocations + * @param acct_id name of the account to load + */ +apr_status_t md_acme_use_acct(md_acme_t *acme, struct md_store_t *store, + apr_pool_t *p, const char *acct_id); + +/** + * Specify the account to use for a specific MD by name in local store. + * On success, the account is the "current" one used by the acme instance. + * @param acme the acme instance to set the account for + * @param store the store to load accounts from + * @param p pool for allocations + * @param acct_id name of the account to load + * @param md the MD the account shall be used for + */ +apr_status_t md_acme_use_acct_for_md(md_acme_t *acme, struct md_store_t *store, + apr_pool_t *p, const char *acct_id, + const md_t *md); + +/** + * Get the local name of the account currently used by the acme instance. + * Will be NULL if no account has been setup successfully. + */ +const char *md_acme_acct_id_get(md_acme_t *acme); + +/** + * Agree to the given Terms-of-Service url for the current account. + */ +apr_status_t md_acme_agree(md_acme_t *acme, apr_pool_t *p, const char *tos); + +/** + * Confirm with the server that the current account agrees to the Terms-of-Service + * given in the agreement url. + * If the known agreement is equal to this, nothing is done. + * If it differs, the account is re-validated in the hope that the server + * announces the Tos URL it wants. If this is equal to the agreement specified, + * the server is notified of this. If the server requires a ToS that the account + * thinks it has already given, it is resend. + * + * If an agreement is required, different from the current one, APR_INCOMPLETE is + * returned and the agreement url is returned in the parameter. + */ +apr_status_t md_acme_check_agreement(md_acme_t *acme, apr_pool_t *p, + const char *agreement, const char **prequired); + +apr_status_t md_acme_save_acct(md_acme_t *acme, apr_pool_t *p, struct md_store_t *store); + +/** + * Deactivate the current account at the ACME server.. + */ +apr_status_t md_acme_acct_deactivate(md_acme_t *acme, apr_pool_t *p); + +/**************************************************************************************************/ +/* request handling */ + +struct md_acme_req_t { + md_acme_t *acme; /* the ACME server to talk to */ + apr_pool_t *p; /* pool for the request duration */ + + const char *url; /* url to POST the request to */ + const char *method; /* HTTP method to use */ + struct md_json_t *prot_fields; /* JWS protected fields */ + struct md_json_t *req_json; /* JSON to be POSTed in request body */ + + apr_table_t *resp_hdrs; /* HTTP response headers */ + struct md_json_t *resp_json; /* JSON response body received */ + + apr_status_t rv; /* status of request */ + + md_acme_req_init_cb *on_init; /* callback to initialize the request before submit */ + md_acme_req_json_cb *on_json; /* callback on successful JSON response */ + md_acme_req_res_cb *on_res; /* callback on generic HTTP response */ + md_acme_req_err_cb *on_err; /* callback on encountered error */ + int max_retries; /* how often this might be retried */ + void *baton; /* userdata for callbacks */ + struct md_result_t *result; /* result of this request */ +}; + +apr_status_t md_acme_req_body_init(md_acme_req_t *req, struct md_json_t *payload); + +apr_status_t md_acme_GET(md_acme_t *acme, const char *url, + md_acme_req_init_cb *on_init, + md_acme_req_json_cb *on_json, + md_acme_req_res_cb *on_res, + md_acme_req_err_cb *on_err, + void *baton); +/** + * Perform a POST against the ACME url. If a on_json callback is given and + * the HTTP response is JSON, only this callback is invoked. Otherwise, on HTTP status + * 2xx, the on_res callback is invoked. If no on_res is given, it is considered a + * response error, since only JSON was expected. + * At least one callback needs to be non-NULL. + * + * @param acme the ACME server to talk to + * @param url the url to send the request to + * @param on_init callback to initialize the request data + * @param on_json callback on successful JSON response + * @param on_res callback on successful HTTP response + * @param baton userdata for callbacks + */ +apr_status_t md_acme_POST(md_acme_t *acme, const char *url, + md_acme_req_init_cb *on_init, + md_acme_req_json_cb *on_json, + md_acme_req_res_cb *on_res, + md_acme_req_err_cb *on_err, + void *baton); + +/** + * Retrieve a JSON resource from the ACME server + */ +apr_status_t md_acme_get_json(struct md_json_t **pjson, md_acme_t *acme, + const char *url, apr_pool_t *p); + + +apr_status_t md_acme_req_body_init(md_acme_req_t *req, struct md_json_t *jpayload); + +apr_status_t md_acme_protos_add(struct apr_hash_t *protos, apr_pool_t *p); + +/** + * Return != 0 iff the given problem identifier is an ACME error string + * indicating something is wrong with the input values, e.g. from our + * configuration. + */ +int md_acme_problem_is_input_related(const char *problem); + +#endif /* md_acme_h */ |