[thirdparty/openssl.git] / apps / provider.c

/*
 * Copyright 2019 The OpenSSL Project Authors. 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 <openssl/opensslconf.h>

#include "apps.h"
#include "app_params.h"
#include "progs.h"
#include "names.h"
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/safestack.h>
#include <openssl/provider.h>
#include <openssl/core.h>
#include <openssl/core_numbers.h>

typedef enum OPTION_choice {
    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
    OPT_V = 100, OPT_VV, OPT_VVV
} OPTION_CHOICE;

const OPTIONS provider_options[] = {
    {OPT_HELP_STR, 1, '-', "Usage: %s [options] provider...\n"},
    {OPT_HELP_STR, 1, '-', "  provider... Providers to load\n"},
    {"help", OPT_HELP, '-', "Display this summary"},
    {"v", OPT_V, '-', "List the algorithm names of specified provider"},
    {"vv", OPT_VV, '-', "List the algorithm names of specified providers,"},
    {OPT_MORE_STR, 0, '-', "categorised by operation type"},
    {"vvv", OPT_VVV, '-', "List the algorithm names of specified provider"},
    {OPT_MORE_STR, 0, '-', "one at a time, and list all known parameters"},
    {NULL}
};

typedef struct info_st INFO;
typedef struct meta_st META;

struct info_st {
    void (*collect_names_fn)(void *method, STACK_OF(OPENSSL_CSTRING) *names);
    void *method;
    const OSSL_PARAM *gettable_params;
    const OSSL_PARAM *gettable_ctx_params;
    const OSSL_PARAM *settable_ctx_params;
};

struct meta_st {
    int first;                   /* For prints */
    int total;
    int indent;
    int subindent;
    int verbose;
    const char *label;
    OSSL_PROVIDER *prov;
    void (*fn)(META *meta, INFO *info);
};

static void collect_cipher_names(void *method,
                                 STACK_OF(OPENSSL_CSTRING) *names)
{
    EVP_CIPHER_names_do_all(method, collect_names, names);
}

static void collect_digest_names(void *method,
                                 STACK_OF(OPENSSL_CSTRING) *names)
{
    EVP_MD_names_do_all(method, collect_names, names);
}

static void collect_mac_names(void *method,
                              STACK_OF(OPENSSL_CSTRING) *names)
{
    EVP_MAC_names_do_all(method, collect_names, names);
}

static void collect_keymgmt_names(void *method,
                                  STACK_OF(OPENSSL_CSTRING) *names)
{
    EVP_KEYMGMT_names_do_all(method, collect_names, names);
}

static void collect_keyexch_names(void *method,
                                  STACK_OF(OPENSSL_CSTRING) *names)
{
    EVP_KEYEXCH_names_do_all(method, collect_names, names);
}

static void collect_signature_names(void *method,
                                  STACK_OF(OPENSSL_CSTRING) *names)
{
    EVP_SIGNATURE_names_do_all(method, collect_names, names);
}

static void print_method_names(BIO *out, INFO *info)
{
    STACK_OF(OPENSSL_CSTRING) *names = sk_OPENSSL_CSTRING_new(name_cmp);

    info->collect_names_fn(info->method, names);
    print_names(out, names);
    sk_OPENSSL_CSTRING_free(names);
}

static void print_caps(META *meta, INFO *info)
{
    switch (meta->verbose) {
    case 1:
        if (!meta->first)
            BIO_printf(bio_out, "; ");
        print_method_names(bio_out, info);
        break;
    case 2:
        if (meta->first) {
            if (meta->total > 0)
                BIO_printf(bio_out, "\n");
            BIO_printf(bio_out, "%*s%ss:", meta->indent, "", meta->label);
        }
        BIO_printf(bio_out, " ");
        print_method_names(bio_out, info);
        break;
    case 3:
    default:
        BIO_printf(bio_out, "%*s%s ", meta->indent, "", meta->label);
        print_method_names(bio_out, info);
        BIO_printf(bio_out, "\n");
        print_param_types("retrievable algorithm parameters",
                          info->gettable_params, meta->subindent);
        print_param_types("retrievable operation parameters",
                          info->gettable_ctx_params, meta->subindent);
        print_param_types("settable operation parameters",
                          info->settable_ctx_params, meta->subindent);
        break;
    }
    meta->first = 0;
}

static void do_method(void *method,
                      void (*collect_names_fn)(void *method,
                                               STACK_OF(OPENSSL_CSTRING) *names),
                      const OSSL_PARAM *gettable_params,
                      const OSSL_PARAM *gettable_ctx_params,
                      const OSSL_PARAM *settable_ctx_params,
                      META *meta)
{
    INFO info;

    info.collect_names_fn = collect_names_fn;
    info.method = method;
    info.gettable_params = gettable_params;
    info.gettable_ctx_params = gettable_ctx_params;
    info.settable_ctx_params = settable_ctx_params;
    meta->fn(meta, &info);
    meta->total++;
}

static void do_cipher(EVP_CIPHER *cipher, void *meta)
{
    do_method(cipher, collect_cipher_names,
              EVP_CIPHER_gettable_params(cipher),
              EVP_CIPHER_gettable_ctx_params(cipher),
              EVP_CIPHER_settable_ctx_params(cipher),
              meta);
}

static void do_digest(EVP_MD *digest, void *meta)
{
    do_method(digest, collect_digest_names,
              EVP_MD_gettable_params(digest),
              EVP_MD_gettable_ctx_params(digest),
              EVP_MD_settable_ctx_params(digest),
              meta);
}

static void do_mac(EVP_MAC *mac, void *meta)
{
    do_method(mac, collect_mac_names,
              EVP_MAC_gettable_params(mac),
              EVP_MAC_gettable_ctx_params(mac),
              EVP_MAC_settable_ctx_params(mac),
              meta);
}

static void do_keymgmt(EVP_KEYMGMT *keymgmt, void *meta)
{
    do_method(keymgmt, collect_keymgmt_names,
/*
 * TODO(3.0) Enable when KEYMGMT and KEYEXCH have gettables and settables
 */
#if 0
              EVP_KEYMGMT_gettable_params(keymgmt),
              EVP_KEYMGMT_gettable_ctx_params(keymgmt),
              EVP_KEYMGMT_settable_ctx_params(keymgmt),
#else
              NULL, NULL, NULL,
#endif
              meta);
}

static void do_keyexch(EVP_KEYEXCH *keyexch, void *meta)
{
    do_method(keyexch, collect_keyexch_names,
/*
 * TODO(3.0) Enable when KEYMGMT and KEYEXCH have gettables and settables
 */
#if 0
              EVP_KEYEXCH_gettable_params(keyexch),
              EVP_KEYEXCH_gettable_ctx_params(keyexch),
              EVP_KEYEXCH_settable_ctx_params(keyexch),
#else
              NULL, NULL, NULL,
#endif
              meta);
}

static void do_signature(EVP_SIGNATURE *signature, void *meta)
{
    do_method(signature, collect_signature_names,
/*
 * TODO(3.0) Enable when KEYMGMT and SIGNATURE have gettables and settables
 */
#if 0
              EVP_SIGNATURE_gettable_params(signature),
              EVP_SIGNATURE_gettable_ctx_params(signature),
              EVP_SIGNATURE_settable_ctx_params(signature),
#else
              NULL, NULL, NULL,
#endif
              meta);
}

int provider_main(int argc, char **argv)
{
    int ret = 1, i;
    int verbose = 0;
    STACK_OF(OPENSSL_CSTRING) *providers = sk_OPENSSL_CSTRING_new_null();
    OPTION_CHOICE o;
    char *prog;

    prog = opt_init(argc, argv, provider_options);
    while ((o = opt_next()) != OPT_EOF) {
        switch (o) {
        default: /* Catching OPT_ERR & covering OPT_EOF which isn't possible */
            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
            goto end;
        case OPT_HELP:
            opt_help(provider_options);
            ret = 0;
            goto end;
        case OPT_VVV:
        case OPT_VV:
        case OPT_V:
            /* Convert to an integer from one to four. */
            i = (int)(o - OPT_V) + 1;
            if (verbose < i)
                verbose = i;
            break;
        }
    }

    /* Allow any trailing parameters as provider names. */
    argc = opt_num_rest();
    argv = opt_rest();
    for ( ; *argv; argv++) {
        if (**argv == '-') {
            BIO_printf(bio_err, "%s: Cannot mix flags and provider names.\n",
                       prog);
            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
            goto end;
        }
        sk_OPENSSL_CSTRING_push(providers, *argv);
    }

    ret = 0;
    for (i = 0; i < sk_OPENSSL_CSTRING_num(providers); i++) {
        const char *name = sk_OPENSSL_CSTRING_value(providers, i);
        OSSL_PROVIDER *prov = OSSL_PROVIDER_load(NULL, name);

        if (prov != NULL) {
            BIO_printf(bio_out, verbose == 0 ? "%s\n" :  "[ %s ]\n", name);

            if (verbose > 0) {
                META data;

                data.total = 0;
                data.first = 1;
                data.verbose = verbose;
                data.prov = prov;
                data.fn = print_caps;

                switch (verbose) {
                case 1:
                    BIO_printf(bio_out, "    ");
                    break;
                case 2:
                    data.indent = 4;
                    break;
                case 3:
                default:
                    data.indent = 4;
                    data.subindent = 10;
                    break;
                }

                if (verbose > 1) {
                    data.first = 1;
                    data.label = "Cipher";
                }
                EVP_CIPHER_do_all_provided(NULL, do_cipher, &data);
                if (verbose > 1) {
                    data.first = 1;
                    data.label = "Digest";
                }
                EVP_MD_do_all_provided(NULL, do_digest, &data);
                if (verbose > 1) {
                    data.first = 1;
                    data.label = "MAC";
                }
                EVP_MAC_do_all_provided(NULL, do_mac, &data);

                if (verbose > 1) {
                    data.first = 1;
                    data.label = "Key manager";
                }
                EVP_KEYMGMT_do_all_provided(NULL, do_keymgmt, &data);
                if (verbose > 1) {
                    data.first = 1;
                    data.label = "Key exchange";
                }
                EVP_KEYEXCH_do_all_provided(NULL, do_keyexch, &data);
                if (verbose > 1) {
                    data.first = 1;
                    data.label = "Signature";
                }
                EVP_SIGNATURE_do_all_provided(NULL, do_signature, &data);

                switch (verbose) {
                default:
                    break;
                case 2:
                case 1:
                    BIO_printf(bio_out, "\n");
                    break;
                }
            }
            OSSL_PROVIDER_unload(prov);
        } else {
            ERR_print_errors(bio_err);
            ret = 1;
            /*
             * Just because one provider module failed, there's no reason to
             * stop, if there are more to try.
             */
        }
    }

 end:

    ERR_print_errors(bio_err);
    sk_OPENSSL_CSTRING_free(providers);
    return ret;
}
Commit	Line	Data
18d307e9 RL	1	/*
	2	* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
	3	*
	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
	8	*/
	9
	10	#include <openssl/opensslconf.h>
	11
	12	#include "apps.h"
	13	#include "app_params.h"
	14	#include "progs.h"
031873fe	15	#include "names.h"
18d307e9 RL	16	#include <openssl/err.h>
	17	#include <openssl/evp.h>
	18	#include <openssl/safestack.h>
	19	#include <openssl/provider.h>
	20	#include <openssl/core.h>
	21	#include <openssl/core_numbers.h>
	22
	23	typedef enum OPTION_choice {
	24	OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
	25	OPT_V = 100, OPT_VV, OPT_VVV
	26	} OPTION_CHOICE;
	27
	28	const OPTIONS provider_options[] = {
	29	{OPT_HELP_STR, 1, '-', "Usage: %s [options] provider...\n"},
	30	{OPT_HELP_STR, 1, '-', " provider... Providers to load\n"},
	31	{"help", OPT_HELP, '-', "Display this summary"},
	32	{"v", OPT_V, '-', "List the algorithm names of specified provider"},
	33	{"vv", OPT_VV, '-', "List the algorithm names of specified providers,"},
	34	{OPT_MORE_STR, 0, '-', "categorised by operation type"},
	35	{"vvv", OPT_VVV, '-', "List the algorithm names of specified provider"},
	36	{OPT_MORE_STR, 0, '-', "one at a time, and list all known parameters"},
	37	{NULL}
	38	};
	39
	40	typedef struct info_st INFO;
	41	typedef struct meta_st META;
	42
	43	struct info_st {
031873fe	44	void (collect_names_fn)(void method, STACK_OF(OPENSSL_CSTRING) *names);
18d307e9 RL	45	void *method;
	46	const OSSL_PARAM *gettable_params;
	47	const OSSL_PARAM *gettable_ctx_params;
	48	const OSSL_PARAM *settable_ctx_params;
	49	};
	50
	51	struct meta_st {
	52	int first; /* For prints */
	53	int total;
	54	int indent;
	55	int subindent;
	56	int verbose;
	57	const char *label;
	58	OSSL_PROVIDER *prov;
	59	void (fn)(META meta, INFO *info);
	60	};
	61
031873fe RL	62	static void collect_cipher_names(void *method,
	63	STACK_OF(OPENSSL_CSTRING) *names)
	64	{
	65	EVP_CIPHER_names_do_all(method, collect_names, names);
	66	}
	67
	68	static void collect_digest_names(void *method,
	69	STACK_OF(OPENSSL_CSTRING) *names)
	70	{
	71	EVP_MD_names_do_all(method, collect_names, names);
	72	}
	73
	74	static void collect_mac_names(void *method,
	75	STACK_OF(OPENSSL_CSTRING) *names)
	76	{
	77	EVP_MAC_names_do_all(method, collect_names, names);
	78	}
	79
	80	static void collect_keymgmt_names(void *method,
	81	STACK_OF(OPENSSL_CSTRING) *names)
	82	{
	83	EVP_KEYMGMT_names_do_all(method, collect_names, names);
	84	}
	85
	86	static void collect_keyexch_names(void *method,
	87	STACK_OF(OPENSSL_CSTRING) *names)
	88	{
	89	EVP_KEYEXCH_names_do_all(method, collect_names, names);
	90	}
	91
	92	static void collect_signature_names(void *method,
	93	STACK_OF(OPENSSL_CSTRING) *names)
	94	{
	95	EVP_SIGNATURE_names_do_all(method, collect_names, names);
	96	}
	97
	98	static void print_method_names(BIO out, INFO info)
	99	{
	100	STACK_OF(OPENSSL_CSTRING) *names = sk_OPENSSL_CSTRING_new(name_cmp);
	101
	102	info->collect_names_fn(info->method, names);
	103	print_names(out, names);
	104	sk_OPENSSL_CSTRING_free(names);
	105	}
	106
18d307e9 RL	107	static void print_caps(META meta, INFO info)
	108	{
	109	switch (meta->verbose) {
	110	case 1:
031873fe RL	111	if (!meta->first)
	112	BIO_printf(bio_out, "; ");
	113	print_method_names(bio_out, info);
18d307e9 RL	114	break;
	115	case 2:
	116	if (meta->first) {
	117	if (meta->total > 0)
	118	BIO_printf(bio_out, "\n");
c92d0c5c	119	BIO_printf(bio_out, "%*s%ss:", meta->indent, "", meta->label);
18d307e9	120	}
031873fe RL	121	BIO_printf(bio_out, " ");
031873fe RL	122	print_method_names(bio_out, info);
18d307e9 RL	123	break;
	124	case 3:
	125	default:
031873fe RL	126	BIO_printf(bio_out, "%*s%s ", meta->indent, "", meta->label);
	127	print_method_names(bio_out, info);
	128	BIO_printf(bio_out, "\n");
18d307e9 RL	129	print_param_types("retrievable algorithm parameters",
	130	info->gettable_params, meta->subindent);
	131	print_param_types("retrievable operation parameters",
	132	info->gettable_ctx_params, meta->subindent);
	133	print_param_types("settable operation parameters",
	134	info->settable_ctx_params, meta->subindent);
	135	break;
	136	}
	137	meta->first = 0;
	138	}
	139
031873fe RL	140	static void do_method(void *method,
	141	void (collect_names_fn)(void method,
	142	STACK_OF(OPENSSL_CSTRING) *names),
18d307e9 RL	143	const OSSL_PARAM *gettable_params,
	144	const OSSL_PARAM *gettable_ctx_params,
	145	const OSSL_PARAM *settable_ctx_params,
	146	META *meta)
	147	{
	148	INFO info;
	149
031873fe	150	info.collect_names_fn = collect_names_fn;
18d307e9 RL	151	info.method = method;
	152	info.gettable_params = gettable_params;
	153	info.gettable_ctx_params = gettable_ctx_params;
	154	info.settable_ctx_params = settable_ctx_params;
	155	meta->fn(meta, &info);
	156	meta->total++;
	157	}
	158
	159	static void do_cipher(EVP_CIPHER cipher, void meta)
	160	{
031873fe	161	do_method(cipher, collect_cipher_names,
18d307e9	162	EVP_CIPHER_gettable_params(cipher),
41f7ecf3 P	163	EVP_CIPHER_gettable_ctx_params(cipher),
41f7ecf3 P	164	EVP_CIPHER_settable_ctx_params(cipher),
18d307e9 RL	165	meta);
	166	}
	167
	168	static void do_digest(EVP_MD digest, void meta)
	169	{
031873fe	170	do_method(digest, collect_digest_names,
18d307e9	171	EVP_MD_gettable_params(digest),
e6879a31 MC	172	EVP_MD_gettable_ctx_params(digest),
e6879a31 MC	173	EVP_MD_settable_ctx_params(digest),
18d307e9 RL	174	meta);
	175	}
	176
	177	static void do_mac(EVP_MAC mac, void meta)
	178	{
031873fe	179	do_method(mac, collect_mac_names,
18d307e9	180	EVP_MAC_gettable_params(mac),
41f7ecf3 P	181	EVP_MAC_gettable_ctx_params(mac),
41f7ecf3 P	182	EVP_MAC_settable_ctx_params(mac),
18d307e9 RL	183	meta);
	184	}
	185
031873fe RL	186	static void do_keymgmt(EVP_KEYMGMT keymgmt, void meta)
	187	{
	188	do_method(keymgmt, collect_keymgmt_names,
18d307e9 RL	189	/*
	190	* TODO(3.0) Enable when KEYMGMT and KEYEXCH have gettables and settables
	191	*/
	192	#if 0
18d307e9 RL	193	EVP_KEYMGMT_gettable_params(keymgmt),
	194	EVP_KEYMGMT_gettable_ctx_params(keymgmt),
	195	EVP_KEYMGMT_settable_ctx_params(keymgmt),
031873fe RL	196	#else
	197	NULL, NULL, NULL,
	198	#endif
18d307e9 RL	199	meta);
	200	}
	201
	202	static void do_keyexch(EVP_KEYEXCH keyexch, void meta)
	203	{
031873fe RL	204	do_method(keyexch, collect_keyexch_names,
	205	/*
	206	* TODO(3.0) Enable when KEYMGMT and KEYEXCH have gettables and settables
	207	*/
	208	#if 0
18d307e9 RL	209	EVP_KEYEXCH_gettable_params(keyexch),
	210	EVP_KEYEXCH_gettable_ctx_params(keyexch),
	211	EVP_KEYEXCH_settable_ctx_params(keyexch),
031873fe RL	212	#else
	213	NULL, NULL, NULL,
	214	#endif
18d307e9 RL	215	meta);
18d307e9 RL	216	}
031873fe RL	217
	218	static void do_signature(EVP_SIGNATURE signature, void meta)
	219	{
	220	do_method(signature, collect_signature_names,
	221	/*
	222	* TODO(3.0) Enable when KEYMGMT and SIGNATURE have gettables and settables
	223	*/
	224	#if 0
	225	EVP_SIGNATURE_gettable_params(signature),
	226	EVP_SIGNATURE_gettable_ctx_params(signature),
	227	EVP_SIGNATURE_settable_ctx_params(signature),
	228	#else
	229	NULL, NULL, NULL,
18d307e9	230	#endif
031873fe RL	231	meta);
031873fe RL	232	}
18d307e9 RL	233
	234	int provider_main(int argc, char **argv)
	235	{
	236	int ret = 1, i;
	237	int verbose = 0;
	238	STACK_OF(OPENSSL_CSTRING) *providers = sk_OPENSSL_CSTRING_new_null();
	239	OPTION_CHOICE o;
	240	char *prog;
	241
	242	prog = opt_init(argc, argv, provider_options);
	243	while ((o = opt_next()) != OPT_EOF) {
	244	switch (o) {
7964e370	245	default: /* Catching OPT_ERR & covering OPT_EOF which isn't possible */
18d307e9 RL	246	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	247	goto end;
	248	case OPT_HELP:
	249	opt_help(provider_options);
	250	ret = 0;
	251	goto end;
	252	case OPT_VVV:
	253	case OPT_VV:
	254	case OPT_V:
	255	/* Convert to an integer from one to four. */
	256	i = (int)(o - OPT_V) + 1;
	257	if (verbose < i)
	258	verbose = i;
	259	break;
	260	}
	261	}
	262
	263	/* Allow any trailing parameters as provider names. */
	264	argc = opt_num_rest();
	265	argv = opt_rest();
	266	for ( ; *argv; argv++) {
	267	if (**argv == '-') {
	268	BIO_printf(bio_err, "%s: Cannot mix flags and provider names.\n",
	269	prog);
	270	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	271	goto end;
	272	}
	273	sk_OPENSSL_CSTRING_push(providers, *argv);
	274	}
	275
	276	ret = 0;
	277	for (i = 0; i < sk_OPENSSL_CSTRING_num(providers); i++) {
	278	const char *name = sk_OPENSSL_CSTRING_value(providers, i);
	279	OSSL_PROVIDER *prov = OSSL_PROVIDER_load(NULL, name);
	280
	281	if (prov != NULL) {
	282	BIO_printf(bio_out, verbose == 0 ? "%s\n" : "[ %s ]\n", name);
	283
	284	if (verbose > 0) {
	285	META data;
	286
	287	data.total = 0;
	288	data.first = 1;
	289	data.verbose = verbose;
	290	data.prov = prov;
	291	data.fn = print_caps;
	292
	293	switch (verbose) {
	294	case 1:
	295	BIO_printf(bio_out, " ");
	296	break;
	297	case 2:
	298	data.indent = 4;
	299	break;
	300	case 3:
	301	default:
	302	data.indent = 4;
	303	data.subindent = 10;
	304	break;
	305	}
	306
	307	if (verbose > 1) {
	308	data.first = 1;
	309	data.label = "Cipher";
310	}
031873fe	311	EVP_CIPHER_do_all_provided(NULL, do_cipher, &data);
18d307e9 RL	312	if (verbose > 1) {
	313	data.first = 1;
	314	data.label = "Digest";
	315	}
031873fe	316	EVP_MD_do_all_provided(NULL, do_digest, &data);
18d307e9 RL	317	if (verbose > 1) {
	318	data.first = 1;
	319	data.label = "MAC";
	320	}
031873fe	321	EVP_MAC_do_all_provided(NULL, do_mac, &data);
18d307e9	322
18d307e9 RL	323	if (verbose > 1) {
	324	data.first = 1;
	325	data.label = "Key manager";
	326	}
031873fe	327	EVP_KEYMGMT_do_all_provided(NULL, do_keymgmt, &data);
18d307e9 RL	328	if (verbose > 1) {
	329	data.first = 1;
	330	data.label = "Key exchange";
	331	}
031873fe RL	332	EVP_KEYEXCH_do_all_provided(NULL, do_keyexch, &data);
	333	if (verbose > 1) {
	334	data.first = 1;
	335	data.label = "Signature";
	336	}
	337	EVP_SIGNATURE_do_all_provided(NULL, do_signature, &data);
18d307e9 RL	338
	339	switch (verbose) {
	340	default:
	341	break;
	342	case 2:
	343	case 1:
	344	BIO_printf(bio_out, "\n");
	345	break;
	346	}
	347	}
	348	OSSL_PROVIDER_unload(prov);
	349	} else {
	350	ERR_print_errors(bio_err);
	351	ret = 1;
	352	/*
	353	* Just because one provider module failed, there's no reason to
	354	* stop, if there are more to try.
	355	*/
	356	}
	357	}
	358
	359	end:
	360
	361	ERR_print_errors(bio_err);
	362	sk_OPENSSL_CSTRING_free(providers);
	363	return ret;
	364	}