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store.h
/* * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #ifndef HEADER_OSSL_STORE_H # define HEADER_OSSL_STORE_H # include <stdarg.h> # include <openssl/ossl_typ.h> # include <openssl/pem.h> # include <openssl/storeerr.h> # ifdef __cplusplus extern "C" { # endif /*- * The main OSSL_STORE functions. * ------------------------------ * * These allow applications to open a channel to a resource with supported * data (keys, certs, crls, ...), read the data a piece at a time and decide * what to do with it, and finally close. */ typedef struct ossl_store_ctx_st OSSL_STORE_CTX; /* * Typedef for the OSSL_STORE_INFO post processing callback. This can be used * to massage the given OSSL_STORE_INFO, or to drop it entirely (by returning * NULL). */ typedef OSSL_STORE_INFO *(*OSSL_STORE_post_process_info_fn)(OSSL_STORE_INFO *, void *); /* * Open a channel given a URI. The given UI method will be used any time the * loader needs extra input, for example when a password or pin is needed, and * will be passed the same user data every time it's needed in this context. * * Returns a context reference which represents the channel to communicate * through. */ OSSL_STORE_CTX *OSSL_STORE_open(const char *uri, const UI_METHOD *ui_method, void *ui_data, OSSL_STORE_post_process_info_fn post_process, void *post_process_data); /* * Control / fine tune the OSSL_STORE channel. |cmd| determines what is to be * done, and depends on the underlying loader (use OSSL_STORE_get0_scheme to * determine which loader is used), except for common commands (see below). * Each command takes different arguments. */ int OSSL_STORE_ctrl(OSSL_STORE_CTX *ctx, int cmd, ... /* args */); int OSSL_STORE_vctrl(OSSL_STORE_CTX *ctx, int cmd, va_list args); /* * Common ctrl commands that different loaders may choose to support. */ /* int on = 0 or 1; STORE_ctrl(ctx, STORE_C_USE_SECMEM, &on); */ # define OSSL_STORE_C_USE_SECMEM 1 /* Where custom commands start */ # define OSSL_STORE_C_CUSTOM_START 100 /* * Read one data item (a key, a cert, a CRL) that is supported by the OSSL_STORE * functionality, given a context. * Returns a OSSL_STORE_INFO pointer, from which OpenSSL typed data can be * extracted with OSSL_STORE_INFO_get0_PKEY(), OSSL_STORE_INFO_get0_CERT(), ... * NULL is returned on error, which may include that the data found at the URI * can't be figured out for certain or is ambiguous. */ OSSL_STORE_INFO *OSSL_STORE_load(OSSL_STORE_CTX *ctx); /* * Check if end of data (end of file) is reached * Returns 1 on end, 0 otherwise. */ int OSSL_STORE_eof(OSSL_STORE_CTX *ctx); /* * Check if an error occurred * Returns 1 if it did, 0 otherwise. */ int OSSL_STORE_error(OSSL_STORE_CTX *ctx); /* * Close the channel * Returns 1 on success, 0 on error. */ int OSSL_STORE_close(OSSL_STORE_CTX *ctx); /*- * Extracting OpenSSL types from and creating new OSSL_STORE_INFOs * --------------------------------------------------------------- */ /* * Types of data that can be ossl_stored in a OSSL_STORE_INFO. * OSSL_STORE_INFO_NAME is typically found when getting a listing of * available "files" / "tokens" / what have you. */ # define OSSL_STORE_INFO_NAME 1 /* char * */ # define OSSL_STORE_INFO_PARAMS 2 /* EVP_PKEY * */ # define OSSL_STORE_INFO_PKEY 3 /* EVP_PKEY * */ # define OSSL_STORE_INFO_CERT 4 /* X509 * */ # define OSSL_STORE_INFO_CRL 5 /* X509_CRL * */ /* * Functions to generate OSSL_STORE_INFOs, one function for each type we * support having in them, as well as a generic constructor. * * In all cases, ownership of the object is transferred to the OSSL_STORE_INFO * and will therefore be freed when the OSSL_STORE_INFO is freed. */ OSSL_STORE_INFO *OSSL_STORE_INFO_new_NAME(char *name); int OSSL_STORE_INFO_set0_NAME_description(OSSL_STORE_INFO *info, char *desc); OSSL_STORE_INFO *OSSL_STORE_INFO_new_PARAMS(EVP_PKEY *params); OSSL_STORE_INFO *OSSL_STORE_INFO_new_PKEY(EVP_PKEY *pkey); OSSL_STORE_INFO *OSSL_STORE_INFO_new_CERT(X509 *x509); OSSL_STORE_INFO *OSSL_STORE_INFO_new_CRL(X509_CRL *crl); /* * Functions to try to extract data from a OSSL_STORE_INFO. */ int OSSL_STORE_INFO_get_type(const OSSL_STORE_INFO *info); const char *OSSL_STORE_INFO_get0_NAME(const OSSL_STORE_INFO *info); char *OSSL_STORE_INFO_get1_NAME(const OSSL_STORE_INFO *info); const char *OSSL_STORE_INFO_get0_NAME_description(const OSSL_STORE_INFO *info); char *OSSL_STORE_INFO_get1_NAME_description(const OSSL_STORE_INFO *info); EVP_PKEY *OSSL_STORE_INFO_get0_PARAMS(const OSSL_STORE_INFO *info); EVP_PKEY *OSSL_STORE_INFO_get1_PARAMS(const OSSL_STORE_INFO *info); EVP_PKEY *OSSL_STORE_INFO_get0_PKEY(const OSSL_STORE_INFO *info); EVP_PKEY *OSSL_STORE_INFO_get1_PKEY(const OSSL_STORE_INFO *info); X509 *OSSL_STORE_INFO_get0_CERT(const OSSL_STORE_INFO *info); X509 *OSSL_STORE_INFO_get1_CERT(const OSSL_STORE_INFO *info); X509_CRL *OSSL_STORE_INFO_get0_CRL(const OSSL_STORE_INFO *info); X509_CRL *OSSL_STORE_INFO_get1_CRL(const OSSL_STORE_INFO *info); const char *OSSL_STORE_INFO_type_string(int type); /* * Free the OSSL_STORE_INFO */ void OSSL_STORE_INFO_free(OSSL_STORE_INFO *info); /*- * Functions to construct a search URI from a base URI and search criteria * ----------------------------------------------------------------------- */ /* OSSL_STORE search types */ # define OSSL_STORE_SEARCH_BY_NAME 1 /* subject in certs, issuer in CRLs */ # define OSSL_STORE_SEARCH_BY_ISSUER_SERIAL 2 # define OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT 3 # define OSSL_STORE_SEARCH_BY_ALIAS 4 /* To check what search types the scheme handler supports */ int OSSL_STORE_supports_search(OSSL_STORE_CTX *ctx, int search_type); /* Search term constructors */ /* * The input is considered to be owned by the caller, and must therefore * remain present throughout the lifetime of the returned OSSL_STORE_SEARCH */ OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_name(X509_NAME *name); OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_issuer_serial(X509_NAME *name, const ASN1_INTEGER *serial); OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_key_fingerprint(const EVP_MD *digest, const unsigned char *bytes, size_t len); OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_alias(const char *alias); /* Search term destructor */ void OSSL_STORE_SEARCH_free(OSSL_STORE_SEARCH *search); /* Search term accessors */ int OSSL_STORE_SEARCH_get_type(const OSSL_STORE_SEARCH *criterion); X509_NAME *OSSL_STORE_SEARCH_get0_name(OSSL_STORE_SEARCH *criterion); const ASN1_INTEGER *OSSL_STORE_SEARCH_get0_serial(const OSSL_STORE_SEARCH *criterion); const unsigned char *OSSL_STORE_SEARCH_get0_bytes(const OSSL_STORE_SEARCH *criterion, size_t *length); const char *OSSL_STORE_SEARCH_get0_string(const OSSL_STORE_SEARCH *criterion); const EVP_MD *OSSL_STORE_SEARCH_get0_digest(const OSSL_STORE_SEARCH *criterion); /* * Add search criterion and expected return type (which can be unspecified) * to the loading channel. This MUST happen before the first OSSL_STORE_load(). */ int OSSL_STORE_expect(OSSL_STORE_CTX *ctx, int expected_type); int OSSL_STORE_find(OSSL_STORE_CTX *ctx, OSSL_STORE_SEARCH *search); /*- * Function to register a loader for the given URI scheme. * ------------------------------------------------------- * * The loader receives all the main components of an URI except for the * scheme. */ typedef struct ossl_store_loader_st OSSL_STORE_LOADER; OSSL_STORE_LOADER *OSSL_STORE_LOADER_new(ENGINE *e, const char *scheme); const ENGINE *OSSL_STORE_LOADER_get0_engine(const OSSL_STORE_LOADER *loader); const char *OSSL_STORE_LOADER_get0_scheme(const OSSL_STORE_LOADER *loader); /* struct ossl_store_loader_ctx_st is defined differently by each loader */ typedef struct ossl_store_loader_ctx_st OSSL_STORE_LOADER_CTX; typedef OSSL_STORE_LOADER_CTX *(*OSSL_STORE_open_fn)(const OSSL_STORE_LOADER *loader, const char *uri, const UI_METHOD *ui_method, void *ui_data); int OSSL_STORE_LOADER_set_open(OSSL_STORE_LOADER *loader, OSSL_STORE_open_fn open_function); typedef int (*OSSL_STORE_ctrl_fn)(OSSL_STORE_LOADER_CTX *ctx, int cmd, va_list args); int OSSL_STORE_LOADER_set_ctrl(OSSL_STORE_LOADER *loader, OSSL_STORE_ctrl_fn ctrl_function); typedef int (*OSSL_STORE_expect_fn)(OSSL_STORE_LOADER_CTX *ctx, int expected); int OSSL_STORE_LOADER_set_expect(OSSL_STORE_LOADER *loader, OSSL_STORE_expect_fn expect_function); typedef int (*OSSL_STORE_find_fn)(OSSL_STORE_LOADER_CTX *ctx, OSSL_STORE_SEARCH *criteria); int OSSL_STORE_LOADER_set_find(OSSL_STORE_LOADER *loader, OSSL_STORE_find_fn find_function); typedef OSSL_STORE_INFO *(*OSSL_STORE_load_fn)(OSSL_STORE_LOADER_CTX *ctx, const UI_METHOD *ui_method, void *ui_data); int OSSL_STORE_LOADER_set_load(OSSL_STORE_LOADER *loader, OSSL_STORE_load_fn load_function); typedef int (*OSSL_STORE_eof_fn)(OSSL_STORE_LOADER_CTX *ctx); int OSSL_STORE_LOADER_set_eof(OSSL_STORE_LOADER *loader, OSSL_STORE_eof_fn eof_function); typedef int (*OSSL_STORE_error_fn)(OSSL_STORE_LOADER_CTX *ctx); int OSSL_STORE_LOADER_set_error(OSSL_STORE_LOADER *loader, OSSL_STORE_error_fn error_function); typedef int (*OSSL_STORE_close_fn)(OSSL_STORE_LOADER_CTX *ctx); int OSSL_STORE_LOADER_set_close(OSSL_STORE_LOADER *loader, OSSL_STORE_close_fn close_function); void OSSL_STORE_LOADER_free(OSSL_STORE_LOADER *loader); int OSSL_STORE_register_loader(OSSL_STORE_LOADER *loader); OSSL_STORE_LOADER *OSSL_STORE_unregister_loader(const char *scheme); /*- * Functions to list STORE loaders * ------------------------------- */ int OSSL_STORE_do_all_loaders(void (*do_function) (const OSSL_STORE_LOADER *loader, void *do_arg), void *do_arg); # ifdef __cplusplus } # endif #endif
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