include/openssl/store.h

   1 /*
   2  * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #ifndef OPENSSL_STORE_H
  11 # define OPENSSL_STORE_H
  12 # pragma once
  13
  14 # include <openssl/macros.h>
  15 # ifndef OPENSSL_NO_DEPRECATED_3_0
  16 #  define HEADER_OSSL_STORE_H
  17 # endif
  18
  19 # include <stdarg.h>
  20 # include <openssl/types.h>
  21 # include <openssl/pem.h>
  22 # include <openssl/storeerr.h>
  23
  24 # ifdef  __cplusplus
  25 extern "C" {
  26 # endif
  27
  28 /*-
  29  *  The main OSSL_STORE functions.
  30  *  ------------------------------
  31  *
  32  *  These allow applications to open a channel to a resource with supported
  33  *  data (keys, certs, crls, ...), read the data a piece at a time and decide
  34  *  what to do with it, and finally close.
  35  */
  36
  37 typedef struct ossl_store_ctx_st OSSL_STORE_CTX;
  38
  39 /*
  40  * Typedef for the OSSL_STORE_INFO post processing callback.  This can be used
  41  * to massage the given OSSL_STORE_INFO, or to drop it entirely (by returning
  42  * NULL).
  43  */
  44 typedef OSSL_STORE_INFO *(*OSSL_STORE_post_process_info_fn)(OSSL_STORE_INFO *,
  45                                                             void *);
  46
  47 /*
  48  * Open a channel given a URI.  The given UI method will be used any time the
  49  * loader needs extra input, for example when a password or pin is needed, and
  50  * will be passed the same user data every time it's needed in this context.
  51  *
  52  * Returns a context reference which represents the channel to communicate
  53  * through.
  54  */
  55 OSSL_STORE_CTX *
  56 OSSL_STORE_open(const char *uri, const UI_METHOD *ui_method, void *ui_data,
  57                 OSSL_STORE_post_process_info_fn post_process,
  58                 void *post_process_data);
  59 OSSL_STORE_CTX *
  60 OSSL_STORE_open_ex(const char *uri, OSSL_LIB_CTX *libctx, const char *propq,
  61                    const UI_METHOD *ui_method, void *ui_data,
  62                    OSSL_STORE_post_process_info_fn post_process,
  63                    void *post_process_data);
  64
  65 /*
  66  * Control / fine tune the OSSL_STORE channel.  |cmd| determines what is to be
  67  * done, and depends on the underlying loader (use OSSL_STORE_get0_scheme to
  68  * determine which loader is used), except for common commands (see below).
  69  * Each command takes different arguments.
  70  */
  71 # ifndef OPENSSL_NO_DEPRECATED_3_0
  72 OSSL_DEPRECATEDIN_3_0 int OSSL_STORE_ctrl(OSSL_STORE_CTX *ctx, int cmd,
  73                                           ... /* args */);
  74 OSSL_DEPRECATEDIN_3_0 int OSSL_STORE_vctrl(OSSL_STORE_CTX *ctx, int cmd,
  75                                            va_list args);
  76 # endif
  77
  78 # ifndef OPENSSL_NO_DEPRECATED_3_0
  79
  80 /*
  81  * Common ctrl commands that different loaders may choose to support.
  82  */
  83 /* int on = 0 or 1; STORE_ctrl(ctx, STORE_C_USE_SECMEM, &on); */
  84 # define OSSL_STORE_C_USE_SECMEM      1
  85 /* Where custom commands start */
  86 # define OSSL_STORE_C_CUSTOM_START    100
  87
  88 # endif
  89
  90 /*
  91  * Read one data item (a key, a cert, a CRL) that is supported by the OSSL_STORE
  92  * functionality, given a context.
  93  * Returns a OSSL_STORE_INFO pointer, from which OpenSSL typed data can be
  94  * extracted with OSSL_STORE_INFO_get0_PKEY(), OSSL_STORE_INFO_get0_CERT(), ...
  95  * NULL is returned on error, which may include that the data found at the URI
  96  * can't be figured out for certain or is ambiguous.
  97  */
  98 OSSL_STORE_INFO *OSSL_STORE_load(OSSL_STORE_CTX *ctx);
  99
 100 /*
 101  * Check if end of data (end of file) is reached
 102  * Returns 1 on end, 0 otherwise.
 103  */
 104 int OSSL_STORE_eof(OSSL_STORE_CTX *ctx);
 105
 106 /*
 107  * Check if an error occurred
 108  * Returns 1 if it did, 0 otherwise.
 109  */
 110 int OSSL_STORE_error(OSSL_STORE_CTX *ctx);
 111
 112 /*
 113  * Close the channel
 114  * Returns 1 on success, 0 on error.
 115  */
 116 int OSSL_STORE_close(OSSL_STORE_CTX *ctx);
 117
 118 /*
 119  * Attach to a BIO.  This works like OSSL_STORE_open() except it takes a
 120  * BIO instead of a uri, along with a scheme to use when reading.
 121  * The given UI method will be used any time the loader needs extra input,
 122  * for example when a password or pin is needed, and will be passed the
 123  * same user data every time it's needed in this context.
 124  *
 125  * Returns a context reference which represents the channel to communicate
 126  * through.
 127  *
 128  * Note that this function is considered unsafe, all depending on what the
 129  * BIO actually reads.
 130  */
 131 OSSL_STORE_CTX *OSSL_STORE_attach(BIO *bio, const char *scheme,
 132                                   OSSL_LIB_CTX *libctx, const char *propq,
 133                                   const UI_METHOD *ui_method, void *ui_data,
 134                                   OSSL_STORE_post_process_info_fn post_process,
 135                                   void *post_process_data);
 136
 137 /*-
 138  *  Extracting OpenSSL types from and creating new OSSL_STORE_INFOs
 139  *  ---------------------------------------------------------------
 140  */
 141
 142 /*
 143  * Types of data that can be ossl_stored in a OSSL_STORE_INFO.
 144  * OSSL_STORE_INFO_NAME is typically found when getting a listing of
 145  * available "files" / "tokens" / what have you.
 146  */
 147 # define OSSL_STORE_INFO_NAME           1   /* char * */
 148 # define OSSL_STORE_INFO_PARAMS         2   /* EVP_PKEY * */
 149 # define OSSL_STORE_INFO_PUBKEY         3   /* EVP_PKEY * */
 150 # define OSSL_STORE_INFO_PKEY           4   /* EVP_PKEY * */
 151 # define OSSL_STORE_INFO_CERT           5   /* X509 * */
 152 # define OSSL_STORE_INFO_CRL            6   /* X509_CRL * */
 153
 154 /*
 155  * Functions to generate OSSL_STORE_INFOs, one function for each type we
 156  * support having in them, as well as a generic constructor.
 157  *
 158  * In all cases, ownership of the object is transferred to the OSSL_STORE_INFO
 159  * and will therefore be freed when the OSSL_STORE_INFO is freed.
 160  */
 161 OSSL_STORE_INFO *OSSL_STORE_INFO_new(int type, void *data);
 162 OSSL_STORE_INFO *OSSL_STORE_INFO_new_NAME(char *name);
 163 int OSSL_STORE_INFO_set0_NAME_description(OSSL_STORE_INFO *info, char *desc);
 164 OSSL_STORE_INFO *OSSL_STORE_INFO_new_PARAMS(EVP_PKEY *params);
 165 OSSL_STORE_INFO *OSSL_STORE_INFO_new_PUBKEY(EVP_PKEY *pubkey);
 166 OSSL_STORE_INFO *OSSL_STORE_INFO_new_PKEY(EVP_PKEY *pkey);
 167 OSSL_STORE_INFO *OSSL_STORE_INFO_new_CERT(X509 *x509);
 168 OSSL_STORE_INFO *OSSL_STORE_INFO_new_CRL(X509_CRL *crl);
 169
 170 /*
 171  * Functions to try to extract data from a OSSL_STORE_INFO.
 172  */
 173 int OSSL_STORE_INFO_get_type(const OSSL_STORE_INFO *info);
 174 void *OSSL_STORE_INFO_get0_data(int type, const OSSL_STORE_INFO *info);
 175 const char *OSSL_STORE_INFO_get0_NAME(const OSSL_STORE_INFO *info);
 176 char *OSSL_STORE_INFO_get1_NAME(const OSSL_STORE_INFO *info);
 177 const char *OSSL_STORE_INFO_get0_NAME_description(const OSSL_STORE_INFO *info);
 178 char *OSSL_STORE_INFO_get1_NAME_description(const OSSL_STORE_INFO *info);
 179 EVP_PKEY *OSSL_STORE_INFO_get0_PARAMS(const OSSL_STORE_INFO *info);
 180 EVP_PKEY *OSSL_STORE_INFO_get1_PARAMS(const OSSL_STORE_INFO *info);
 181 EVP_PKEY *OSSL_STORE_INFO_get0_PUBKEY(const OSSL_STORE_INFO *info);
 182 EVP_PKEY *OSSL_STORE_INFO_get1_PUBKEY(const OSSL_STORE_INFO *info);
 183 EVP_PKEY *OSSL_STORE_INFO_get0_PKEY(const OSSL_STORE_INFO *info);
 184 EVP_PKEY *OSSL_STORE_INFO_get1_PKEY(const OSSL_STORE_INFO *info);
 185 X509 *OSSL_STORE_INFO_get0_CERT(const OSSL_STORE_INFO *info);
 186 X509 *OSSL_STORE_INFO_get1_CERT(const OSSL_STORE_INFO *info);
 187 X509_CRL *OSSL_STORE_INFO_get0_CRL(const OSSL_STORE_INFO *info);
 188 X509_CRL *OSSL_STORE_INFO_get1_CRL(const OSSL_STORE_INFO *info);
 189
 190 const char *OSSL_STORE_INFO_type_string(int type);
 191
 192 /*
 193  * Free the OSSL_STORE_INFO
 194  */
 195 void OSSL_STORE_INFO_free(OSSL_STORE_INFO *info);
 196
 197
 198 /*-
 199  *  Functions to construct a search URI from a base URI and search criteria
 200  *  -----------------------------------------------------------------------
 201  */
 202
 203 /* OSSL_STORE search types */
 204 # define OSSL_STORE_SEARCH_BY_NAME              1 /* subject in certs, issuer in CRLs */
 205 # define OSSL_STORE_SEARCH_BY_ISSUER_SERIAL     2
 206 # define OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT   3
 207 # define OSSL_STORE_SEARCH_BY_ALIAS             4
 208
 209 /* To check what search types the scheme handler supports */
 210 int OSSL_STORE_supports_search(OSSL_STORE_CTX *ctx, int search_type);
 211
 212 /* Search term constructors */
 213 /*
 214  * The input is considered to be owned by the caller, and must therefore
 215  * remain present throughout the lifetime of the returned OSSL_STORE_SEARCH
 216  */
 217 OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_name(X509_NAME *name);
 218 OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_issuer_serial(X509_NAME *name,
 219                                                       const ASN1_INTEGER
 220                                                       *serial);
 221 OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_key_fingerprint(const EVP_MD *digest,
 222                                                         const unsigned char
 223                                                         *bytes, size_t len);
 224 OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_alias(const char *alias);
 225
 226 /* Search term destructor */
 227 void OSSL_STORE_SEARCH_free(OSSL_STORE_SEARCH *search);
 228
 229 /* Search term accessors */
 230 int OSSL_STORE_SEARCH_get_type(const OSSL_STORE_SEARCH *criterion);
 231 X509_NAME *OSSL_STORE_SEARCH_get0_name(const OSSL_STORE_SEARCH *criterion);
 232 const ASN1_INTEGER *OSSL_STORE_SEARCH_get0_serial(const OSSL_STORE_SEARCH
 233                                                   *criterion);
 234 const unsigned char *OSSL_STORE_SEARCH_get0_bytes(const OSSL_STORE_SEARCH
 235                                                   *criterion, size_t *length);
 236 const char *OSSL_STORE_SEARCH_get0_string(const OSSL_STORE_SEARCH *criterion);
 237 const EVP_MD *OSSL_STORE_SEARCH_get0_digest(const OSSL_STORE_SEARCH *criterion);
 238
 239 /*
 240  * Add search criterion and expected return type (which can be unspecified)
 241  * to the loading channel.  This MUST happen before the first OSSL_STORE_load().
 242  */
 243 int OSSL_STORE_expect(OSSL_STORE_CTX *ctx, int expected_type);
 244 int OSSL_STORE_find(OSSL_STORE_CTX *ctx, const OSSL_STORE_SEARCH *search);
 245
 246
 247 /*-
 248  *  Function to fetch a loader and extract data from it
 249  *  ---------------------------------------------------
 250  */
 251
 252 typedef struct ossl_store_loader_st OSSL_STORE_LOADER;
 253
 254 OSSL_STORE_LOADER *OSSL_STORE_LOADER_fetch(const char *scheme,
 255                                            OSSL_LIB_CTX *libctx,
 256                                            const char *properties);
 257 int OSSL_STORE_LOADER_up_ref(OSSL_STORE_LOADER *loader);
 258 void OSSL_STORE_LOADER_free(OSSL_STORE_LOADER *loader);
 259 const OSSL_PROVIDER *OSSL_STORE_LOADER_provider(const OSSL_STORE_LOADER *
 260                                                 loader);
 261 const char *OSSL_STORE_LOADER_properties(const OSSL_STORE_LOADER *loader);
 262 int OSSL_STORE_LOADER_number(const OSSL_STORE_LOADER *loader);
 263 int OSSL_STORE_LOADER_is_a(const OSSL_STORE_LOADER *loader,
 264                            const char *scheme);
 265 void OSSL_STORE_LOADER_do_all_provided(OSSL_LIB_CTX *libctx,
 266                                        void (*fn)(OSSL_STORE_LOADER *loader,
 267                                                   void *arg),
 268                                        void *arg);
 269 int OSSL_STORE_LOADER_names_do_all(const OSSL_STORE_LOADER *loader,
 270                                    void (*fn)(const char *name, void *data),
 271                                    void *data);
 272
 273 /*-
 274  *  Function to register a loader for the given URI scheme.
 275  *  -------------------------------------------------------
 276  *
 277  *  The loader receives all the main components of an URI except for the
 278  *  scheme.
 279  */
 280
 281 # ifndef OPENSSL_NO_DEPRECATED_3_0
 282
 283 /* struct ossl_store_loader_ctx_st is defined differently by each loader */
 284 typedef struct ossl_store_loader_ctx_st OSSL_STORE_LOADER_CTX;
 285 typedef OSSL_STORE_LOADER_CTX *(*OSSL_STORE_open_fn)
 286     (const OSSL_STORE_LOADER *loader, const char *uri,
 287      const UI_METHOD *ui_method, void *ui_data);
 288 typedef OSSL_STORE_LOADER_CTX *(*OSSL_STORE_open_ex_fn)
 289     (const OSSL_STORE_LOADER *loader,
 290      const char *uri, OSSL_LIB_CTX *libctx, const char *propq,
 291      const UI_METHOD *ui_method, void *ui_data);
 292
 293 typedef OSSL_STORE_LOADER_CTX *(*OSSL_STORE_attach_fn)
 294     (const OSSL_STORE_LOADER *loader, BIO *bio,
 295      OSSL_LIB_CTX *libctx, const char *propq,
 296      const UI_METHOD *ui_method, void *ui_data);
 297 typedef int (*OSSL_STORE_ctrl_fn)
 298     (OSSL_STORE_LOADER_CTX *ctx, int cmd, va_list args);
 299 typedef int (*OSSL_STORE_expect_fn)
 300     (OSSL_STORE_LOADER_CTX *ctx, int expected);
 301 typedef int (*OSSL_STORE_find_fn)
 302     (OSSL_STORE_LOADER_CTX *ctx, const OSSL_STORE_SEARCH *criteria);
 303 typedef OSSL_STORE_INFO *(*OSSL_STORE_load_fn)
 304     (OSSL_STORE_LOADER_CTX *ctx, const UI_METHOD *ui_method, void *ui_data);
 305 typedef int (*OSSL_STORE_eof_fn)(OSSL_STORE_LOADER_CTX *ctx);
 306 typedef int (*OSSL_STORE_error_fn)(OSSL_STORE_LOADER_CTX *ctx);
 307 typedef int (*OSSL_STORE_close_fn)(OSSL_STORE_LOADER_CTX *ctx);
 308
 309 # endif
 310 # ifndef OPENSSL_NO_DEPRECATED_3_0
 311 OSSL_DEPRECATEDIN_3_0
 312 OSSL_STORE_LOADER *OSSL_STORE_LOADER_new(ENGINE *e, const char *scheme);
 313 OSSL_DEPRECATEDIN_3_0
 314 int OSSL_STORE_LOADER_set_open(OSSL_STORE_LOADER *loader,
 315                                OSSL_STORE_open_fn open_function);
 316 OSSL_DEPRECATEDIN_3_0
 317 int OSSL_STORE_LOADER_set_open_ex(OSSL_STORE_LOADER *loader,
 318                                   OSSL_STORE_open_ex_fn open_ex_function);
 319 OSSL_DEPRECATEDIN_3_0
 320 int OSSL_STORE_LOADER_set_attach(OSSL_STORE_LOADER *loader,
 321                                  OSSL_STORE_attach_fn attach_function);
 322 OSSL_DEPRECATEDIN_3_0
 323 int OSSL_STORE_LOADER_set_ctrl(OSSL_STORE_LOADER *loader,
 324                                OSSL_STORE_ctrl_fn ctrl_function);
 325 OSSL_DEPRECATEDIN_3_0
 326 int OSSL_STORE_LOADER_set_expect(OSSL_STORE_LOADER *loader,
 327                                  OSSL_STORE_expect_fn expect_function);
 328 OSSL_DEPRECATEDIN_3_0
 329 int OSSL_STORE_LOADER_set_find(OSSL_STORE_LOADER *loader,
 330                                OSSL_STORE_find_fn find_function);
 331 OSSL_DEPRECATEDIN_3_0
 332 int OSSL_STORE_LOADER_set_load(OSSL_STORE_LOADER *loader,
 333                                OSSL_STORE_load_fn load_function);
 334 OSSL_DEPRECATEDIN_3_0
 335 int OSSL_STORE_LOADER_set_eof(OSSL_STORE_LOADER *loader,
 336                               OSSL_STORE_eof_fn eof_function);
 337 OSSL_DEPRECATEDIN_3_0
 338 int OSSL_STORE_LOADER_set_error(OSSL_STORE_LOADER *loader,
 339                                 OSSL_STORE_error_fn error_function);
 340 OSSL_DEPRECATEDIN_3_0
 341 int OSSL_STORE_LOADER_set_close(OSSL_STORE_LOADER *loader,
 342                                 OSSL_STORE_close_fn close_function);
 343 OSSL_DEPRECATEDIN_3_0
 344 const ENGINE *OSSL_STORE_LOADER_get0_engine(const OSSL_STORE_LOADER *loader);
 345 OSSL_DEPRECATEDIN_3_0
 346 const char * OSSL_STORE_LOADER_get0_scheme(const OSSL_STORE_LOADER *loader);
 347 OSSL_DEPRECATEDIN_3_0
 348 int OSSL_STORE_register_loader(OSSL_STORE_LOADER *loader);
 349 OSSL_DEPRECATEDIN_3_0
 350 OSSL_STORE_LOADER *OSSL_STORE_unregister_loader(const char *scheme);
 351 # endif
 352
 353 /*-
 354  *  Functions to list STORE loaders
 355  *  -------------------------------
 356  */
 357 # ifndef OPENSSL_NO_DEPRECATED_3_0
 358 OSSL_DEPRECATEDIN_3_0
 359 int OSSL_STORE_do_all_loaders(void (*do_function)(const OSSL_STORE_LOADER *loader,
 360                                                   void *do_arg),
 361                               void *do_arg);
 362 # endif
 363
 364 # ifdef  __cplusplus
 365 }
 366 # endif
 367 #endif