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/*
* Copyright 2016-2018 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 occured * 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 transfered 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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