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