mirror of
https://github.com/openssl/openssl.git
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407 lines
12 KiB
C
407 lines
12 KiB
C
/*
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* Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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*
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* Licensed under the Apache License 2.0 (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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#include <string.h>
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#include <openssl/err.h>
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#include <openssl/cryptoerr.h>
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#include <openssl/params.h>
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#include <openssl/types.h>
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#include <openssl/safestack.h>
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#include "internal/param_build_set.h"
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/*
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* Special internal param type to indicate the end of an allocate OSSL_PARAM
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* array.
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*/
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typedef struct {
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const char *key;
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int type;
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int secure;
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size_t size;
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size_t alloc_blocks;
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const BIGNUM *bn;
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const void *string;
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union {
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/*
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* These fields are never directly addressed, but their sizes are
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* imporant so that all native types can be copied here without overrun.
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*/
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ossl_intmax_t i;
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ossl_uintmax_t u;
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double d;
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} num;
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} OSSL_PARAM_BLD_DEF;
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DEFINE_STACK_OF(OSSL_PARAM_BLD_DEF)
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struct ossl_param_bld_st {
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size_t total_blocks;
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size_t secure_blocks;
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STACK_OF(OSSL_PARAM_BLD_DEF) *params;
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};
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static OSSL_PARAM_BLD_DEF *param_push(OSSL_PARAM_BLD *bld, const char *key,
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int size, size_t alloc, int type,
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int secure)
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{
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OSSL_PARAM_BLD_DEF *pd = OPENSSL_zalloc(sizeof(*pd));
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if (pd == NULL) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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pd->key = key;
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pd->type = type;
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pd->size = size;
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pd->alloc_blocks = ossl_param_bytes_to_blocks(alloc);
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if ((pd->secure = secure) != 0)
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bld->secure_blocks += pd->alloc_blocks;
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else
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bld->total_blocks += pd->alloc_blocks;
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if (sk_OSSL_PARAM_BLD_DEF_push(bld->params, pd) <= 0) {
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OPENSSL_free(pd);
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pd = NULL;
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}
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return pd;
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}
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static int param_push_num(OSSL_PARAM_BLD *bld, const char *key,
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void *num, size_t size, int type)
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{
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OSSL_PARAM_BLD_DEF *pd = param_push(bld, key, size, size, type, 0);
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if (pd == NULL) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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if (size > sizeof(pd->num)) {
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ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_MANY_BYTES);
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return 0;
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}
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memcpy(&pd->num, num, size);
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return 1;
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}
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OSSL_PARAM_BLD *OSSL_PARAM_BLD_new(void)
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{
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OSSL_PARAM_BLD *r = OPENSSL_zalloc(sizeof(OSSL_PARAM_BLD));
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if (r != NULL) {
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r->params = sk_OSSL_PARAM_BLD_DEF_new_null();
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if (r->params == NULL) {
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OPENSSL_free(r);
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r = NULL;
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}
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}
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return r;
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}
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static void free_all_params(OSSL_PARAM_BLD *bld)
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{
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int i, n = sk_OSSL_PARAM_BLD_DEF_num(bld->params);
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for (i = 0; i < n; i++)
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OPENSSL_free(sk_OSSL_PARAM_BLD_DEF_pop(bld->params));
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}
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void OSSL_PARAM_BLD_free(OSSL_PARAM_BLD *bld)
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{
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if (bld == NULL)
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return;
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free_all_params(bld);
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sk_OSSL_PARAM_BLD_DEF_free(bld->params);
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OPENSSL_free(bld);
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}
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int OSSL_PARAM_BLD_push_int(OSSL_PARAM_BLD *bld, const char *key, int num)
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{
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return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
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}
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int OSSL_PARAM_BLD_push_uint(OSSL_PARAM_BLD *bld, const char *key,
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unsigned int num)
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{
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return param_push_num(bld, key, &num, sizeof(num),
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OSSL_PARAM_UNSIGNED_INTEGER);
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}
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int OSSL_PARAM_BLD_push_long(OSSL_PARAM_BLD *bld, const char *key,
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long int num)
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{
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return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
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}
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int OSSL_PARAM_BLD_push_ulong(OSSL_PARAM_BLD *bld, const char *key,
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unsigned long int num)
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{
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return param_push_num(bld, key, &num, sizeof(num),
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OSSL_PARAM_UNSIGNED_INTEGER);
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}
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int OSSL_PARAM_BLD_push_int32(OSSL_PARAM_BLD *bld, const char *key,
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int32_t num)
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{
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return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
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}
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int OSSL_PARAM_BLD_push_uint32(OSSL_PARAM_BLD *bld, const char *key,
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uint32_t num)
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{
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return param_push_num(bld, key, &num, sizeof(num),
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OSSL_PARAM_UNSIGNED_INTEGER);
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}
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int OSSL_PARAM_BLD_push_int64(OSSL_PARAM_BLD *bld, const char *key,
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int64_t num)
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{
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return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
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}
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int OSSL_PARAM_BLD_push_uint64(OSSL_PARAM_BLD *bld, const char *key,
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uint64_t num)
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{
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return param_push_num(bld, key, &num, sizeof(num),
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OSSL_PARAM_UNSIGNED_INTEGER);
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}
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int OSSL_PARAM_BLD_push_size_t(OSSL_PARAM_BLD *bld, const char *key,
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size_t num)
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{
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return param_push_num(bld, key, &num, sizeof(num),
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OSSL_PARAM_UNSIGNED_INTEGER);
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}
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int OSSL_PARAM_BLD_push_time_t(OSSL_PARAM_BLD *bld, const char *key,
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time_t num)
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{
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return param_push_num(bld, key, &num, sizeof(num),
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OSSL_PARAM_INTEGER);
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}
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int OSSL_PARAM_BLD_push_double(OSSL_PARAM_BLD *bld, const char *key,
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double num)
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{
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return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_REAL);
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}
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static int push_BN(OSSL_PARAM_BLD *bld, const char *key,
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const BIGNUM *bn, size_t sz, int type)
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{
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int n, secure = 0;
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OSSL_PARAM_BLD_DEF *pd;
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if (!ossl_assert(type == OSSL_PARAM_UNSIGNED_INTEGER
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|| type == OSSL_PARAM_INTEGER))
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return 0;
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if (bn != NULL) {
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if (type == OSSL_PARAM_UNSIGNED_INTEGER && BN_is_negative(bn)) {
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ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_UNSUPPORTED,
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"Negative big numbers are unsupported for OSSL_PARAM_UNSIGNED_INTEGER");
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return 0;
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}
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n = BN_num_bytes(bn);
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if (n < 0) {
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ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_ZERO_LENGTH_NUMBER);
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return 0;
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}
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if (sz < (size_t)n) {
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ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER);
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return 0;
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}
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if (BN_get_flags(bn, BN_FLG_SECURE) == BN_FLG_SECURE)
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secure = 1;
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}
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pd = param_push(bld, key, sz, sz, type, secure);
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if (pd == NULL)
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return 0;
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pd->bn = bn;
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return 1;
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}
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int OSSL_PARAM_BLD_push_BN(OSSL_PARAM_BLD *bld, const char *key,
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const BIGNUM *bn)
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{
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if (BN_is_negative(bn))
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return push_BN(bld, key, bn, bn == NULL ? 0 : BN_num_bytes(bn) + 1,
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OSSL_PARAM_INTEGER);
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return push_BN(bld, key, bn, bn == NULL ? 0 : BN_num_bytes(bn),
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OSSL_PARAM_UNSIGNED_INTEGER);
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}
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int OSSL_PARAM_BLD_push_BN_pad(OSSL_PARAM_BLD *bld, const char *key,
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const BIGNUM *bn, size_t sz)
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{
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if (BN_is_negative(bn))
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return push_BN(bld, key, bn, bn == NULL ? 0 : BN_num_bytes(bn),
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OSSL_PARAM_INTEGER);
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return push_BN(bld, key, bn, sz, OSSL_PARAM_UNSIGNED_INTEGER);
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}
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int OSSL_PARAM_BLD_push_utf8_string(OSSL_PARAM_BLD *bld, const char *key,
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const char *buf, size_t bsize)
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{
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OSSL_PARAM_BLD_DEF *pd;
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int secure;
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if (bsize == 0) {
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bsize = strlen(buf);
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} else if (bsize > INT_MAX) {
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ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_STRING_TOO_LONG);
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return 0;
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}
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secure = CRYPTO_secure_allocated(buf);
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pd = param_push(bld, key, bsize, bsize + 1, OSSL_PARAM_UTF8_STRING, secure);
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if (pd == NULL)
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return 0;
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pd->string = buf;
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return 1;
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}
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int OSSL_PARAM_BLD_push_utf8_ptr(OSSL_PARAM_BLD *bld, const char *key,
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char *buf, size_t bsize)
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{
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OSSL_PARAM_BLD_DEF *pd;
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if (bsize == 0) {
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bsize = strlen(buf);
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} else if (bsize > INT_MAX) {
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ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_STRING_TOO_LONG);
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return 0;
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}
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pd = param_push(bld, key, bsize, sizeof(buf), OSSL_PARAM_UTF8_PTR, 0);
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if (pd == NULL)
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return 0;
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pd->string = buf;
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return 1;
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}
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int OSSL_PARAM_BLD_push_octet_string(OSSL_PARAM_BLD *bld, const char *key,
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const void *buf, size_t bsize)
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{
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OSSL_PARAM_BLD_DEF *pd;
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int secure;
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if (bsize > INT_MAX) {
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ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_STRING_TOO_LONG);
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return 0;
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}
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secure = CRYPTO_secure_allocated(buf);
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pd = param_push(bld, key, bsize, bsize, OSSL_PARAM_OCTET_STRING, secure);
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if (pd == NULL)
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return 0;
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pd->string = buf;
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return 1;
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}
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int OSSL_PARAM_BLD_push_octet_ptr(OSSL_PARAM_BLD *bld, const char *key,
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void *buf, size_t bsize)
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{
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OSSL_PARAM_BLD_DEF *pd;
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if (bsize > INT_MAX) {
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ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_STRING_TOO_LONG);
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return 0;
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}
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pd = param_push(bld, key, bsize, sizeof(buf), OSSL_PARAM_OCTET_PTR, 0);
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if (pd == NULL)
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return 0;
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pd->string = buf;
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return 1;
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}
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static OSSL_PARAM *param_bld_convert(OSSL_PARAM_BLD *bld, OSSL_PARAM *param,
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OSSL_PARAM_ALIGNED_BLOCK *blk,
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OSSL_PARAM_ALIGNED_BLOCK *secure)
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{
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int i, num = sk_OSSL_PARAM_BLD_DEF_num(bld->params);
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OSSL_PARAM_BLD_DEF *pd;
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void *p;
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for (i = 0; i < num; i++) {
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pd = sk_OSSL_PARAM_BLD_DEF_value(bld->params, i);
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param[i].key = pd->key;
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param[i].data_type = pd->type;
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param[i].data_size = pd->size;
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param[i].return_size = OSSL_PARAM_UNMODIFIED;
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if (pd->secure) {
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p = secure;
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secure += pd->alloc_blocks;
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} else {
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p = blk;
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blk += pd->alloc_blocks;
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}
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param[i].data = p;
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if (pd->bn != NULL) {
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/* BIGNUM */
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if (pd->type == OSSL_PARAM_UNSIGNED_INTEGER)
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BN_bn2nativepad(pd->bn, (unsigned char *)p, pd->size);
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else
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BN_signed_bn2native(pd->bn, (unsigned char *)p, pd->size);
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} else if (pd->type == OSSL_PARAM_OCTET_PTR
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|| pd->type == OSSL_PARAM_UTF8_PTR) {
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/* PTR */
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*(const void **)p = pd->string;
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} else if (pd->type == OSSL_PARAM_OCTET_STRING
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|| pd->type == OSSL_PARAM_UTF8_STRING) {
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if (pd->string != NULL)
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memcpy(p, pd->string, pd->size);
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else
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memset(p, 0, pd->size);
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if (pd->type == OSSL_PARAM_UTF8_STRING)
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((char *)p)[pd->size] = '\0';
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} else {
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/* Number, but could also be a NULL BIGNUM */
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if (pd->size > sizeof(pd->num))
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memset(p, 0, pd->size);
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else if (pd->size > 0)
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memcpy(p, &pd->num, pd->size);
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}
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}
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param[i] = OSSL_PARAM_construct_end();
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return param + i;
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}
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OSSL_PARAM *OSSL_PARAM_BLD_to_param(OSSL_PARAM_BLD *bld)
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{
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OSSL_PARAM_ALIGNED_BLOCK *blk, *s = NULL;
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OSSL_PARAM *params, *last;
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const int num = sk_OSSL_PARAM_BLD_DEF_num(bld->params);
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const size_t p_blks = ossl_param_bytes_to_blocks((1 + num) * sizeof(*params));
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const size_t total = OSSL_PARAM_ALIGN_SIZE * (p_blks + bld->total_blocks);
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const size_t ss = OSSL_PARAM_ALIGN_SIZE * bld->secure_blocks;
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if (ss > 0) {
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s = OPENSSL_secure_malloc(ss);
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if (s == NULL) {
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ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_SECURE_MALLOC_FAILURE);
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return NULL;
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}
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}
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params = OPENSSL_malloc(total);
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if (params == NULL) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
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OPENSSL_secure_free(s);
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return NULL;
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}
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blk = p_blks + (OSSL_PARAM_ALIGNED_BLOCK *)(params);
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last = param_bld_convert(bld, params, blk, s);
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ossl_param_set_secure_block(last, s, ss);
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/* Reset builder for reuse */
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bld->total_blocks = 0;
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bld->secure_blocks = 0;
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free_all_params(bld);
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return params;
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}
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