/src/openssl/crypto/param_build.c

Source
/*
 * Copyright 2019-2025 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright (c) 2019, Oracle and/or its affiliates.  All rights reserved.
 *
 * Licensed under the Apache License 2.0 (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
 */

#include <string.h>
#include <openssl/err.h>
#include <openssl/cryptoerr.h>
#include <openssl/params.h>
#include <openssl/types.h>
#include <openssl/safestack.h>
#include "internal/param_build_set.h"

/*
 * Special internal param type to indicate the end of an allocate OSSL_PARAM
 * array.
 */

typedef struct {
    const char *key;
    int type;
    int secure;
    size_t size;
    size_t alloc_blocks;
    const BIGNUM *bn;
    const void *string;
    union {
        /*
         * These fields are never directly addressed, but their sizes are
         * important so that all native types can be copied here without overrun.
         */
        ossl_intmax_t i;
        ossl_uintmax_t u;
        double d;
    } num;
} OSSL_PARAM_BLD_DEF;

DEFINE_STACK_OF(OSSL_PARAM_BLD_DEF)

struct ossl_param_bld_st {
    size_t total_blocks;
    size_t secure_blocks;
    STACK_OF(OSSL_PARAM_BLD_DEF) *params;
};

static OSSL_PARAM_BLD_DEF *param_push(OSSL_PARAM_BLD *bld, const char *key,
                                      size_t size, size_t alloc, int type,
                                      int secure)
{
    OSSL_PARAM_BLD_DEF *pd = OPENSSL_zalloc(sizeof(*pd));

    if (pd == NULL)
        return NULL;
    pd->key = key;
    pd->type = type;
    pd->size = size;
    pd->alloc_blocks = ossl_param_bytes_to_blocks(alloc);
    if ((pd->secure = secure) != 0)
        bld->secure_blocks += pd->alloc_blocks;
    else
        bld->total_blocks += pd->alloc_blocks;
    if (sk_OSSL_PARAM_BLD_DEF_push(bld->params, pd) <= 0) {
        OPENSSL_free(pd);
        pd = NULL;
    }
    return pd;
}

static int param_push_num(OSSL_PARAM_BLD *bld, const char *key,
                          void *num, size_t size, int type)
{
    OSSL_PARAM_BLD_DEF *pd = param_push(bld, key, size, size, type, 0);

    if (pd == NULL) {
        ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
        return 0;
    }
    if (size > sizeof(pd->num)) {
        ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_MANY_BYTES);
        return 0;
    }
    memcpy(&pd->num, num, size);
    return 1;
}

OSSL_PARAM_BLD *OSSL_PARAM_BLD_new(void)
{
    OSSL_PARAM_BLD *r = OPENSSL_zalloc(sizeof(OSSL_PARAM_BLD));

    if (r != NULL) {
        r->params = sk_OSSL_PARAM_BLD_DEF_new_null();
        if (r->params == NULL) {
            OPENSSL_free(r);
            r = NULL;
        }
    }
    return r;
}

static void free_all_params(OSSL_PARAM_BLD *bld)
{
    int i, n = sk_OSSL_PARAM_BLD_DEF_num(bld->params);

    for (i = 0; i < n; i++)
        OPENSSL_free(sk_OSSL_PARAM_BLD_DEF_pop(bld->params));
}

void OSSL_PARAM_BLD_free(OSSL_PARAM_BLD *bld)
{
    if (bld == NULL)
        return;
    free_all_params(bld);
    sk_OSSL_PARAM_BLD_DEF_free(bld->params);
    OPENSSL_free(bld);
}

int OSSL_PARAM_BLD_push_int(OSSL_PARAM_BLD *bld, const char *key, int num)
{
    return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
}

int OSSL_PARAM_BLD_push_uint(OSSL_PARAM_BLD *bld, const char *key,
                             unsigned int num)
{
    return param_push_num(bld, key, &num, sizeof(num),
                          OSSL_PARAM_UNSIGNED_INTEGER);
}

int OSSL_PARAM_BLD_push_long(OSSL_PARAM_BLD *bld, const char *key,
                             long int num)
{
    return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
}

int OSSL_PARAM_BLD_push_ulong(OSSL_PARAM_BLD *bld, const char *key,
                              unsigned long int num)
{
    return param_push_num(bld, key, &num, sizeof(num),
                          OSSL_PARAM_UNSIGNED_INTEGER);
}

int OSSL_PARAM_BLD_push_int32(OSSL_PARAM_BLD *bld, const char *key,
                              int32_t num)
{
    return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
}

int OSSL_PARAM_BLD_push_uint32(OSSL_PARAM_BLD *bld, const char *key,
                               uint32_t num)
{
    return param_push_num(bld, key, &num, sizeof(num),
                          OSSL_PARAM_UNSIGNED_INTEGER);
}

int OSSL_PARAM_BLD_push_int64(OSSL_PARAM_BLD *bld, const char *key,
                              int64_t num)
{
    return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
}

int OSSL_PARAM_BLD_push_uint64(OSSL_PARAM_BLD *bld, const char *key,
                               uint64_t num)
{
    return param_push_num(bld, key, &num, sizeof(num),
                          OSSL_PARAM_UNSIGNED_INTEGER);
}

int OSSL_PARAM_BLD_push_size_t(OSSL_PARAM_BLD *bld, const char *key,
                               size_t num)
{
    return param_push_num(bld, key, &num, sizeof(num),
                          OSSL_PARAM_UNSIGNED_INTEGER);
}

int OSSL_PARAM_BLD_push_time_t(OSSL_PARAM_BLD *bld, const char *key,
                               time_t num)
{
    return param_push_num(bld, key, &num, sizeof(num),
                          OSSL_PARAM_INTEGER);
}

int OSSL_PARAM_BLD_push_double(OSSL_PARAM_BLD *bld, const char *key,
                               double num)
{
    return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_REAL);
}

static int push_BN(OSSL_PARAM_BLD *bld, const char *key,
                   const BIGNUM *bn, size_t sz, int type)
{
    int n, secure = 0;
    OSSL_PARAM_BLD_DEF *pd;

    if (!ossl_assert(type == OSSL_PARAM_UNSIGNED_INTEGER
                     || type == OSSL_PARAM_INTEGER))
        return 0;

    if (bn != NULL) {
        if (type == OSSL_PARAM_UNSIGNED_INTEGER && BN_is_negative(bn)) {
            ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_UNSUPPORTED,
                           "Negative big numbers are unsupported for OSSL_PARAM_UNSIGNED_INTEGER");
            return 0;
        }

        n = BN_num_bytes(bn);
        if (n < 0) {
            ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_ZERO_LENGTH_NUMBER);
            return 0;
        }
        if (sz < (size_t)n) {
            ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER);
            return 0;
        }
        if (BN_get_flags(bn, BN_FLG_SECURE) == BN_FLG_SECURE)
            secure = 1;

        /* The BIGNUM is zero, we must transfer at least one byte */
        if (sz == 0)
            sz++;
    }
    pd = param_push(bld, key, sz, sz, type, secure);
    if (pd == NULL)
        return 0;
    pd->bn = bn;
    return 1;
}

int OSSL_PARAM_BLD_push_BN(OSSL_PARAM_BLD *bld, const char *key,
                           const BIGNUM *bn)
{
    if (bn != NULL && BN_is_negative(bn))
        return push_BN(bld, key, bn, BN_num_bytes(bn) + 1,
                       OSSL_PARAM_INTEGER);
    return push_BN(bld, key, bn, bn == NULL ? 0 : BN_num_bytes(bn),
                   OSSL_PARAM_UNSIGNED_INTEGER);
}

int OSSL_PARAM_BLD_push_BN_pad(OSSL_PARAM_BLD *bld, const char *key,
                               const BIGNUM *bn, size_t sz)
{
    if (bn != NULL && BN_is_negative(bn))
        return push_BN(bld, key, bn, BN_num_bytes(bn),
                       OSSL_PARAM_INTEGER);
    return push_BN(bld, key, bn, sz, OSSL_PARAM_UNSIGNED_INTEGER);
}

int OSSL_PARAM_BLD_push_utf8_string(OSSL_PARAM_BLD *bld, const char *key,
                                    const char *buf, size_t bsize)
{
    OSSL_PARAM_BLD_DEF *pd;
    int secure;

    if (bsize == 0)
        bsize = strlen(buf);
    secure = CRYPTO_secure_allocated(buf);
    pd = param_push(bld, key, bsize, bsize + 1, OSSL_PARAM_UTF8_STRING, secure);
    if (pd == NULL)
        return 0;
    pd->string = buf;
    return 1;
}

int OSSL_PARAM_BLD_push_utf8_ptr(OSSL_PARAM_BLD *bld, const char *key,
                                 char *buf, size_t bsize)
{
    OSSL_PARAM_BLD_DEF *pd;

    if (bsize == 0)
        bsize = strlen(buf);
    pd = param_push(bld, key, bsize, sizeof(buf), OSSL_PARAM_UTF8_PTR, 0);
    if (pd == NULL)
        return 0;
    pd->string = buf;
    return 1;
}

int OSSL_PARAM_BLD_push_octet_string(OSSL_PARAM_BLD *bld, const char *key,
                                     const void *buf, size_t bsize)
{
    OSSL_PARAM_BLD_DEF *pd;
    int secure;

    secure = CRYPTO_secure_allocated(buf);
    pd = param_push(bld, key, bsize, bsize, OSSL_PARAM_OCTET_STRING, secure);
    if (pd == NULL)
        return 0;
    pd->string = buf;
    return 1;
}

int OSSL_PARAM_BLD_push_octet_ptr(OSSL_PARAM_BLD *bld, const char *key,
                                  void *buf, size_t bsize)
{
    OSSL_PARAM_BLD_DEF *pd;

    pd = param_push(bld, key, bsize, sizeof(buf), OSSL_PARAM_OCTET_PTR, 0);
    if (pd == NULL)
        return 0;
    pd->string = buf;
    return 1;
}

static OSSL_PARAM *param_bld_convert(OSSL_PARAM_BLD *bld, OSSL_PARAM *param,
                                     OSSL_PARAM_ALIGNED_BLOCK *blk,
                                     OSSL_PARAM_ALIGNED_BLOCK *secure)
{
    int i, num = sk_OSSL_PARAM_BLD_DEF_num(bld->params);
    OSSL_PARAM_BLD_DEF *pd;
    void *p;

    for (i = 0; i < num; i++) {
        pd = sk_OSSL_PARAM_BLD_DEF_value(bld->params, i);
        param[i].key = pd->key;
        param[i].data_type = pd->type;
        param[i].data_size = pd->size;
        param[i].return_size = OSSL_PARAM_UNMODIFIED;

        if (pd->secure) {
            p = secure;
            secure += pd->alloc_blocks;
        } else {
            p = blk;
            blk += pd->alloc_blocks;
        }
        param[i].data = p;
        if (pd->bn != NULL) {
            /* BIGNUM */
            if (pd->type == OSSL_PARAM_UNSIGNED_INTEGER)
                BN_bn2nativepad(pd->bn, (unsigned char *)p, (int)pd->size);
            else
                BN_signed_bn2native(pd->bn, (unsigned char *)p, (int)pd->size);
        } else if (pd->type == OSSL_PARAM_OCTET_PTR
                   || pd->type == OSSL_PARAM_UTF8_PTR) {
            /* PTR */
            *(const void **)p = pd->string;
        } else if (pd->type == OSSL_PARAM_OCTET_STRING
                   || pd->type == OSSL_PARAM_UTF8_STRING) {
            if (pd->string != NULL)
                memcpy(p, pd->string, pd->size);
            else
                memset(p, 0, pd->size);
            if (pd->type == OSSL_PARAM_UTF8_STRING)
                ((char *)p)[pd->size] = '\0';
        } else {
            /* Number, but could also be a NULL BIGNUM */
            if (pd->size > sizeof(pd->num))
                memset(p, 0, pd->size);
            else if (pd->size > 0)
                memcpy(p, &pd->num, pd->size);
        }
    }
    param[i] = OSSL_PARAM_construct_end();
    return param + i;
}

OSSL_PARAM *OSSL_PARAM_BLD_to_param(OSSL_PARAM_BLD *bld)
{
    OSSL_PARAM_ALIGNED_BLOCK *blk, *s = NULL;
    OSSL_PARAM *params, *last;
    const int num = sk_OSSL_PARAM_BLD_DEF_num(bld->params);
    const size_t p_blks = ossl_param_bytes_to_blocks((1 + num) * sizeof(*params));
    const size_t total = OSSL_PARAM_ALIGN_SIZE * (p_blks + bld->total_blocks);
    const size_t ss = OSSL_PARAM_ALIGN_SIZE * bld->secure_blocks;

    if (ss > 0) {
        s = OPENSSL_secure_malloc(ss);
        if (s == NULL) {
            ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_SECURE_MALLOC_FAILURE);
            return NULL;
        }
    }
    params = OPENSSL_malloc(total);
    if (params == NULL) {
        OPENSSL_secure_free(s);
        return NULL;
    }
    blk = p_blks + (OSSL_PARAM_ALIGNED_BLOCK *)(params);
    last = param_bld_convert(bld, params, blk, s);
    ossl_param_set_secure_block(last, s, ss);
    last->return_size = total;

    /* Reset builder for reuse */
    bld->total_blocks = 0;
    bld->secure_blocks = 0;
    free_all_params(bld);
    return params;
}

Coverage Report

Created: 2025-10-28 06:56

Line	Count	Source
1		/*
2		* Copyright 2019-2025 The OpenSSL Project Authors. All Rights Reserved.
3		* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
4		*
5		* Licensed under the Apache License 2.0 (the "License"). You may not use
6		* this file except in compliance with the License. You can obtain a copy
7		* in the file LICENSE in the source distribution or at
8		* https://www.openssl.org/source/license.html
9		*/
10
11		#include <string.h>
12		#include <openssl/err.h>
13		#include <openssl/cryptoerr.h>
14		#include <openssl/params.h>
15		#include <openssl/types.h>
16		#include <openssl/safestack.h>
17		#include "internal/param_build_set.h"
18
19		/*
20		* Special internal param type to indicate the end of an allocate OSSL_PARAM
21		* array.
22		*/
23
24		typedef struct {
25		const char *key;
26		int type;
27		int secure;
28		size_t size;
29		size_t alloc_blocks;
30		const BIGNUM *bn;
31		const void *string;
32		union {
33		/*
34		* These fields are never directly addressed, but their sizes are
35		* important so that all native types can be copied here without overrun.
36		*/
37		ossl_intmax_t i;
38		ossl_uintmax_t u;
39		double d;
40		} num;
41		} OSSL_PARAM_BLD_DEF;
42
43		DEFINE_STACK_OF(OSSL_PARAM_BLD_DEF)
44
45		struct ossl_param_bld_st {
46		size_t total_blocks;
47		size_t secure_blocks;
48		STACK_OF(OSSL_PARAM_BLD_DEF) *params;
49		};
50
51		static OSSL_PARAM_BLD_DEF param_push(OSSL_PARAM_BLD bld, const char *key,
52		size_t size, size_t alloc, int type,
53		int secure)
54	0	{
55	0	OSSL_PARAM_BLD_DEF pd = OPENSSL_zalloc(sizeof(pd));
56
57	0	if (pd == NULL)
58	0	return NULL;
59	0	pd->key = key;
60	0	pd->type = type;
61	0	pd->size = size;
62	0	pd->alloc_blocks = ossl_param_bytes_to_blocks(alloc);
63	0	if ((pd->secure = secure) != 0)
64	0	bld->secure_blocks += pd->alloc_blocks;
65	0	else
66	0	bld->total_blocks += pd->alloc_blocks;
67	0	if (sk_OSSL_PARAM_BLD_DEF_push(bld->params, pd) <= 0) {
68	0	OPENSSL_free(pd);
69	0	pd = NULL;
70	0	}
71	0	return pd;
72	0	}
73
74		static int param_push_num(OSSL_PARAM_BLD bld, const char key,
75		void *num, size_t size, int type)
76	0	{
77	0	OSSL_PARAM_BLD_DEF *pd = param_push(bld, key, size, size, type, 0);
78
79	0	if (pd == NULL) {
80	0	ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
81	0	return 0;
82	0	}
83	0	if (size > sizeof(pd->num)) {
84	0	ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_MANY_BYTES);
85	0	return 0;
86	0	}
87	0	memcpy(&pd->num, num, size);
88	0	return 1;
89	0	}
90
91		OSSL_PARAM_BLD *OSSL_PARAM_BLD_new(void)
92	0	{
93	0	OSSL_PARAM_BLD *r = OPENSSL_zalloc(sizeof(OSSL_PARAM_BLD));
94
95	0	if (r != NULL) {
96	0	r->params = sk_OSSL_PARAM_BLD_DEF_new_null();
97	0	if (r->params == NULL) {
98	0	OPENSSL_free(r);
99	0	r = NULL;
100	0	}
101	0	}
102	0	return r;
103	0	}
104
105		static void free_all_params(OSSL_PARAM_BLD *bld)
106	0	{
107	0	int i, n = sk_OSSL_PARAM_BLD_DEF_num(bld->params);
108
109	0	for (i = 0; i < n; i++)
110	0	OPENSSL_free(sk_OSSL_PARAM_BLD_DEF_pop(bld->params));
111	0	}
112
113		void OSSL_PARAM_BLD_free(OSSL_PARAM_BLD *bld)
114	0	{
115	0	if (bld == NULL)
116	0	return;
117	0	free_all_params(bld);
118	0	sk_OSSL_PARAM_BLD_DEF_free(bld->params);
119	0	OPENSSL_free(bld);
120	0	}
121
122		int OSSL_PARAM_BLD_push_int(OSSL_PARAM_BLD bld, const char key, int num)
123	0	{
124	0	return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
125	0	}
126
127		int OSSL_PARAM_BLD_push_uint(OSSL_PARAM_BLD bld, const char key,
128		unsigned int num)
129	0	{
130	0	return param_push_num(bld, key, &num, sizeof(num),
131	0	OSSL_PARAM_UNSIGNED_INTEGER);
132	0	}
133
134		int OSSL_PARAM_BLD_push_long(OSSL_PARAM_BLD bld, const char key,
135		long int num)
136	0	{
137	0	return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
138	0	}
139
140		int OSSL_PARAM_BLD_push_ulong(OSSL_PARAM_BLD bld, const char key,
141		unsigned long int num)
142	0	{
143	0	return param_push_num(bld, key, &num, sizeof(num),
144	0	OSSL_PARAM_UNSIGNED_INTEGER);
145	0	}
146
147		int OSSL_PARAM_BLD_push_int32(OSSL_PARAM_BLD bld, const char key,
148		int32_t num)
149	0	{
150	0	return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
151	0	}
152
153		int OSSL_PARAM_BLD_push_uint32(OSSL_PARAM_BLD bld, const char key,
154		uint32_t num)
155	0	{
156	0	return param_push_num(bld, key, &num, sizeof(num),
157	0	OSSL_PARAM_UNSIGNED_INTEGER);
158	0	}
159
160		int OSSL_PARAM_BLD_push_int64(OSSL_PARAM_BLD bld, const char key,
161		int64_t num)
162	0	{
163	0	return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_INTEGER);
164	0	}
165
166		int OSSL_PARAM_BLD_push_uint64(OSSL_PARAM_BLD bld, const char key,
167		uint64_t num)
168	0	{
169	0	return param_push_num(bld, key, &num, sizeof(num),
170	0	OSSL_PARAM_UNSIGNED_INTEGER);
171	0	}
172
173		int OSSL_PARAM_BLD_push_size_t(OSSL_PARAM_BLD bld, const char key,
174		size_t num)
175	0	{
176	0	return param_push_num(bld, key, &num, sizeof(num),
177	0	OSSL_PARAM_UNSIGNED_INTEGER);
178	0	}
179
180		int OSSL_PARAM_BLD_push_time_t(OSSL_PARAM_BLD bld, const char key,
181		time_t num)
182	0	{
183	0	return param_push_num(bld, key, &num, sizeof(num),
184	0	OSSL_PARAM_INTEGER);
185	0	}
186
187		int OSSL_PARAM_BLD_push_double(OSSL_PARAM_BLD bld, const char key,
188		double num)
189	0	{
190	0	return param_push_num(bld, key, &num, sizeof(num), OSSL_PARAM_REAL);
191	0	}
192
193		static int push_BN(OSSL_PARAM_BLD bld, const char key,
194		const BIGNUM *bn, size_t sz, int type)
195	0	{
196	0	int n, secure = 0;
197	0	OSSL_PARAM_BLD_DEF *pd;
198
199	0	if (!ossl_assert(type == OSSL_PARAM_UNSIGNED_INTEGER
200	0	\|\| type == OSSL_PARAM_INTEGER))
201	0	return 0;
202
203	0	if (bn != NULL) {
204	0	if (type == OSSL_PARAM_UNSIGNED_INTEGER && BN_is_negative(bn)) {
205	0	ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_UNSUPPORTED,
206	0	"Negative big numbers are unsupported for OSSL_PARAM_UNSIGNED_INTEGER");
207	0	return 0;
208	0	}
209
210	0	n = BN_num_bytes(bn);
211	0	if (n < 0) {
212	0	ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_ZERO_LENGTH_NUMBER);
213	0	return 0;
214	0	}
215	0	if (sz < (size_t)n) {
216	0	ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER);
217	0	return 0;
218	0	}
219	0	if (BN_get_flags(bn, BN_FLG_SECURE) == BN_FLG_SECURE)
220	0	secure = 1;
221
222		/* The BIGNUM is zero, we must transfer at least one byte */
223	0	if (sz == 0)
224	0	sz++;
225	0	}
226	0	pd = param_push(bld, key, sz, sz, type, secure);
227	0	if (pd == NULL)
228	0	return 0;
229	0	pd->bn = bn;
230	0	return 1;
231	0	}
232
233		int OSSL_PARAM_BLD_push_BN(OSSL_PARAM_BLD bld, const char key,
234		const BIGNUM *bn)
235	0	{
236	0	if (bn != NULL && BN_is_negative(bn))
237	0	return push_BN(bld, key, bn, BN_num_bytes(bn) + 1,
238	0	OSSL_PARAM_INTEGER);
239	0	return push_BN(bld, key, bn, bn == NULL ? 0 : BN_num_bytes(bn),
240	0	OSSL_PARAM_UNSIGNED_INTEGER);
241	0	}
242
243		int OSSL_PARAM_BLD_push_BN_pad(OSSL_PARAM_BLD bld, const char key,
244		const BIGNUM *bn, size_t sz)
245	0	{
246	0	if (bn != NULL && BN_is_negative(bn))
247	0	return push_BN(bld, key, bn, BN_num_bytes(bn),
248	0	OSSL_PARAM_INTEGER);
249	0	return push_BN(bld, key, bn, sz, OSSL_PARAM_UNSIGNED_INTEGER);
250	0	}
251
252		int OSSL_PARAM_BLD_push_utf8_string(OSSL_PARAM_BLD bld, const char key,
253		const char *buf, size_t bsize)
254	0	{
255	0	OSSL_PARAM_BLD_DEF *pd;
256	0	int secure;
257
258	0	if (bsize == 0)
259	0	bsize = strlen(buf);
260	0	secure = CRYPTO_secure_allocated(buf);
261	0	pd = param_push(bld, key, bsize, bsize + 1, OSSL_PARAM_UTF8_STRING, secure);
262	0	if (pd == NULL)
263	0	return 0;
264	0	pd->string = buf;
265	0	return 1;
266	0	}
267
268		int OSSL_PARAM_BLD_push_utf8_ptr(OSSL_PARAM_BLD bld, const char key,
269		char *buf, size_t bsize)
270	0	{
271	0	OSSL_PARAM_BLD_DEF *pd;
272
273	0	if (bsize == 0)
274	0	bsize = strlen(buf);
275	0	pd = param_push(bld, key, bsize, sizeof(buf), OSSL_PARAM_UTF8_PTR, 0);
276	0	if (pd == NULL)
277	0	return 0;
278	0	pd->string = buf;
279	0	return 1;
280	0	}
281
282		int OSSL_PARAM_BLD_push_octet_string(OSSL_PARAM_BLD bld, const char key,
283		const void *buf, size_t bsize)
284	0	{
285	0	OSSL_PARAM_BLD_DEF *pd;
286	0	int secure;
287
288	0	secure = CRYPTO_secure_allocated(buf);
289	0	pd = param_push(bld, key, bsize, bsize, OSSL_PARAM_OCTET_STRING, secure);
290	0	if (pd == NULL)
291	0	return 0;
292	0	pd->string = buf;
293	0	return 1;
294	0	}
295
296		int OSSL_PARAM_BLD_push_octet_ptr(OSSL_PARAM_BLD bld, const char key,
297		void *buf, size_t bsize)
298	0	{
299	0	OSSL_PARAM_BLD_DEF *pd;
300
301	0	pd = param_push(bld, key, bsize, sizeof(buf), OSSL_PARAM_OCTET_PTR, 0);
302	0	if (pd == NULL)
303	0	return 0;
304	0	pd->string = buf;
305	0	return 1;
306	0	}
307
308		static OSSL_PARAM param_bld_convert(OSSL_PARAM_BLD bld, OSSL_PARAM *param,
309		OSSL_PARAM_ALIGNED_BLOCK *blk,
310		OSSL_PARAM_ALIGNED_BLOCK *secure)
311	0	{
312	0	int i, num = sk_OSSL_PARAM_BLD_DEF_num(bld->params);
313	0	OSSL_PARAM_BLD_DEF *pd;
314	0	void *p;
315
316	0	for (i = 0; i < num; i++) {
317	0	pd = sk_OSSL_PARAM_BLD_DEF_value(bld->params, i);
318	0	param[i].key = pd->key;
319	0	param[i].data_type = pd->type;
320	0	param[i].data_size = pd->size;
321	0	param[i].return_size = OSSL_PARAM_UNMODIFIED;
322
323	0	if (pd->secure) {
324	0	p = secure;
325	0	secure += pd->alloc_blocks;
326	0	} else {
327	0	p = blk;
328	0	blk += pd->alloc_blocks;
329	0	}
330	0	param[i].data = p;
331	0	if (pd->bn != NULL) {
332		/* BIGNUM */
333	0	if (pd->type == OSSL_PARAM_UNSIGNED_INTEGER)
334	0	BN_bn2nativepad(pd->bn, (unsigned char *)p, (int)pd->size);
335	0	else
336	0	BN_signed_bn2native(pd->bn, (unsigned char *)p, (int)pd->size);
337	0	} else if (pd->type == OSSL_PARAM_OCTET_PTR
338	0	\|\| pd->type == OSSL_PARAM_UTF8_PTR) {
339		/* PTR */
340	0	(const void *)p = pd->string;
341	0	} else if (pd->type == OSSL_PARAM_OCTET_STRING
342	0	\|\| pd->type == OSSL_PARAM_UTF8_STRING) {
343	0	if (pd->string != NULL)
344	0	memcpy(p, pd->string, pd->size);
345	0	else
346	0	memset(p, 0, pd->size);
347	0	if (pd->type == OSSL_PARAM_UTF8_STRING)
348	0	((char *)p)[pd->size] = '\0';
349	0	} else {
350		/* Number, but could also be a NULL BIGNUM */
351	0	if (pd->size > sizeof(pd->num))
352	0	memset(p, 0, pd->size);
353	0	else if (pd->size > 0)
354	0	memcpy(p, &pd->num, pd->size);
355	0	}
356	0	}
357	0	param[i] = OSSL_PARAM_construct_end();
358	0	return param + i;
359	0	}
360
361		OSSL_PARAM OSSL_PARAM_BLD_to_param(OSSL_PARAM_BLD bld)
362	0	{
363	0	OSSL_PARAM_ALIGNED_BLOCK blk, s = NULL;
364	0	OSSL_PARAM params, last;
365	0	const int num = sk_OSSL_PARAM_BLD_DEF_num(bld->params);
366	0	const size_t p_blks = ossl_param_bytes_to_blocks((1 + num) * sizeof(*params));
367	0	const size_t total = OSSL_PARAM_ALIGN_SIZE * (p_blks + bld->total_blocks);
368	0	const size_t ss = OSSL_PARAM_ALIGN_SIZE * bld->secure_blocks;
369
370	0	if (ss > 0) {
371	0	s = OPENSSL_secure_malloc(ss);
372	0	if (s == NULL) {
373	0	ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_SECURE_MALLOC_FAILURE);
374	0	return NULL;
375	0	}
376	0	}
377	0	params = OPENSSL_malloc(total);
378	0	if (params == NULL) {
379	0	OPENSSL_secure_free(s);
380	0	return NULL;
381	0	}
382	0	blk = p_blks + (OSSL_PARAM_ALIGNED_BLOCK *)(params);
383	0	last = param_bld_convert(bld, params, blk, s);
384	0	ossl_param_set_secure_block(last, s, ss);
385	0	last->return_size = total;
386
387		/* Reset builder for reuse */
388	0	bld->total_blocks = 0;
389	0	bld->secure_blocks = 0;
390	0	free_all_params(bld);
391	0	return params;
392	0	}