crypto/passphrase.c - third_party/openssl - Git at Google

 /*
  * Copyright 2020-2022 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/err.h>
 #include <openssl/ui.h>
 #include <openssl/core_names.h>
 #include "internal/cryptlib.h"
 #include "internal/passphrase.h"

 void ossl_pw_clear_passphrase_data(struct ossl_passphrase_data_st *data)
 {
     if (data != NULL) {
         if (data->type == is_expl_passphrase)
             OPENSSL_clear_free(data->_.expl_passphrase.passphrase_copy,
                                data->_.expl_passphrase.passphrase_len);
         ossl_pw_clear_passphrase_cache(data);
         memset(data, 0, sizeof(*data));
     }
 }

 void ossl_pw_clear_passphrase_cache(struct ossl_passphrase_data_st *data)
 {
     OPENSSL_clear_free(data->cached_passphrase, data->cached_passphrase_len);
     data->cached_passphrase = NULL;
 }

 int ossl_pw_set_passphrase(struct ossl_passphrase_data_st *data,
                            const unsigned char *passphrase,
                            size_t passphrase_len)
 {
     if (!ossl_assert(data != NULL && passphrase != NULL)) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
         return 0;
     }
     ossl_pw_clear_passphrase_data(data);
     data->type = is_expl_passphrase;
     data->_.expl_passphrase.passphrase_copy =
         passphrase_len != 0 ? OPENSSL_memdup(passphrase, passphrase_len)
                             : OPENSSL_malloc(1);
     if (data->_.expl_passphrase.passphrase_copy == NULL) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
         return 0;
     }
     data->_.expl_passphrase.passphrase_len = passphrase_len;
     return 1;
 }

 int ossl_pw_set_pem_password_cb(struct ossl_passphrase_data_st *data,
                                 pem_password_cb *cb, void *cbarg)
 {
     if (!ossl_assert(data != NULL && cb != NULL)) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
         return 0;
     }
     ossl_pw_clear_passphrase_data(data);
     data->type = is_pem_password;
     data->_.pem_password.password_cb = cb;
     data->_.pem_password.password_cbarg = cbarg;
     return 1;
 }

 int ossl_pw_set_ossl_passphrase_cb(struct ossl_passphrase_data_st *data,
                                    OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 {
     if (!ossl_assert(data != NULL && cb != NULL)) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
         return 0;
     }
     ossl_pw_clear_passphrase_data(data);
     data->type = is_ossl_passphrase;
     data->_.ossl_passphrase.passphrase_cb = cb;
     data->_.ossl_passphrase.passphrase_cbarg = cbarg;
     return 1;
 }

 int ossl_pw_set_ui_method(struct ossl_passphrase_data_st *data,
                           const UI_METHOD *ui_method, void *ui_data)
 {
     if (!ossl_assert(data != NULL && ui_method != NULL)) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
         return 0;
     }
     ossl_pw_clear_passphrase_data(data);
     data->type = is_ui_method;
     data->_.ui_method.ui_method = ui_method;
     data->_.ui_method.ui_method_data = ui_data;
     return 1;
 }

 int ossl_pw_enable_passphrase_caching(struct ossl_passphrase_data_st *data)
 {
     data->flag_cache_passphrase = 1;
     return 1;
 }

 int ossl_pw_disable_passphrase_caching(struct ossl_passphrase_data_st *data)
 {
     data->flag_cache_passphrase = 0;
     return 1;
 }


 /*-
  * UI_METHOD processor.  It differs from UI_UTIL_read_pw() like this:
  *
  * 1.  It constructs a prompt on its own, based on |prompt_info|.
  * 2.  It allocates a buffer for password and verification on its own
  *     to compensate for NUL terminator in UI password strings.
  * 3.  It raises errors.
  * 4.  It reports back the length of the prompted pass phrase.
  */
 static int do_ui_passphrase(char *pass, size_t pass_size, size_t *pass_len,
                             const char *prompt_info, int verify,
                             const UI_METHOD *ui_method, void *ui_data)
 {
     char *prompt = NULL, *ipass = NULL, *vpass = NULL;
     int prompt_idx = -1, verify_idx = -1, res;
     UI *ui = NULL;
     int ret = 0;

     if (!ossl_assert(pass != NULL && pass_size != 0 && pass_len != NULL)) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
         return 0;
     }

     if ((ui = UI_new()) == NULL) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
         return 0;
     }

     if (ui_method != NULL) {
         UI_set_method(ui, ui_method);
         if (ui_data != NULL)
             UI_add_user_data(ui, ui_data);
     }

     /* Get an application constructed prompt */
     prompt = UI_construct_prompt(ui, "pass phrase", prompt_info);
     if (prompt == NULL) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
         goto end;
     }

     /* Get a buffer for verification prompt */
     ipass = OPENSSL_zalloc(pass_size + 1);
     if (ipass == NULL) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
         goto end;
     }

     prompt_idx = UI_add_input_string(ui, prompt,
                                      UI_INPUT_FLAG_DEFAULT_PWD,
                                      ipass, 0, pass_size) - 1;
     if (prompt_idx < 0) {
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
         goto end;
     }

     if (verify) {
         /* Get a buffer for verification prompt */
         vpass = OPENSSL_zalloc(pass_size + 1);
         if (vpass == NULL) {
             ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
             goto end;
         }
         verify_idx = UI_add_verify_string(ui, prompt,
                                           UI_INPUT_FLAG_DEFAULT_PWD,
                                           vpass, 0, pass_size,
                                           ipass) - 1;
         if (verify_idx < 0) {
             ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
             goto end;
         }
     }

     switch (UI_process(ui)) {
     case -2:
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERRUPTED_OR_CANCELLED);
         break;
     case -1:
         ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
         break;
     default:
         res = UI_get_result_length(ui, prompt_idx);
         if (res < 0) {
             ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
             break;
         }
         *pass_len = (size_t)res;
         memcpy(pass, ipass, *pass_len);
         ret = 1;
         break;
     }

  end:
     OPENSSL_clear_free(vpass, pass_size + 1);
     OPENSSL_clear_free(ipass, pass_size + 1);
     OPENSSL_free(prompt);
     UI_free(ui);
     return ret;
 }

 /* Central pw prompting dispatcher */
 int ossl_pw_get_passphrase(char *pass, size_t pass_size, size_t *pass_len,
                            const OSSL_PARAM params[], int verify,
                            struct ossl_passphrase_data_st *data)
 {
     const char *source = NULL;
     size_t source_len = 0;
     const char *prompt_info = NULL;
     const UI_METHOD *ui_method = NULL;
     UI_METHOD *allocated_ui_method = NULL;
     void *ui_data = NULL;
     const OSSL_PARAM *p = NULL;
     int ret;

     /* Handle explicit and cached passphrases */

     if (data->type == is_expl_passphrase) {
         source = data->_.expl_passphrase.passphrase_copy;
         source_len = data->_.expl_passphrase.passphrase_len;
     } else if (data->flag_cache_passphrase && data->cached_passphrase != NULL) {
         source = data->cached_passphrase;
         source_len = data->cached_passphrase_len;
     }

     if (source != NULL) {
         if (source_len > pass_size)
             source_len = pass_size;
         memcpy(pass, source, source_len);
         *pass_len = source_len;
         return 1;
     }

     /* Handle the is_ossl_passphrase case...  that's pretty direct */

     if (data->type == is_ossl_passphrase) {
         OSSL_PASSPHRASE_CALLBACK *cb = data->_.ossl_passphrase.passphrase_cb;
         void *cbarg = data->_.ossl_passphrase.passphrase_cbarg;

         ret = cb(pass, pass_size, pass_len, params, cbarg);
         goto do_cache;
     }

     /* Handle the is_pem_password and is_ui_method cases */

     if ((p = OSSL_PARAM_locate_const(params,
                                      OSSL_PASSPHRASE_PARAM_INFO)) != NULL) {
         if (p->data_type != OSSL_PARAM_UTF8_STRING) {
             ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_PASSED_INVALID_ARGUMENT,
                            "Prompt info data type incorrect");
             return 0;
         }
         prompt_info = p->data;
     }

     if (data->type == is_pem_password) {
         /* We use a UI wrapper for PEM */
         pem_password_cb *cb = data->_.pem_password.password_cb;

         ui_method = allocated_ui_method =
             UI_UTIL_wrap_read_pem_callback(cb, verify);
         ui_data = data->_.pem_password.password_cbarg;

         if (ui_method == NULL) {
             ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
             return 0;
         }
     } else if (data->type == is_ui_method) {
         ui_method = data->_.ui_method.ui_method;
         ui_data = data->_.ui_method.ui_method_data;
     }

     if (ui_method == NULL) {
         ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_PASSED_INVALID_ARGUMENT,
                        "No password method specified");
         return 0;
     }

     ret = do_ui_passphrase(pass, pass_size, pass_len, prompt_info, verify,
                            ui_method, ui_data);

     UI_destroy_method(allocated_ui_method);

  do_cache:
     if (ret && data->flag_cache_passphrase) {
         if (data->cached_passphrase == NULL
             || *pass_len > data->cached_passphrase_len) {
             void *new_cache =
                 OPENSSL_clear_realloc(data->cached_passphrase,
                                       data->cached_passphrase_len,
                                       *pass_len + 1);

             if (new_cache == NULL) {
                 OPENSSL_cleanse(pass, *pass_len);
                 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
                 return 0;
             }
             data->cached_passphrase = new_cache;
         }
         memcpy(data->cached_passphrase, pass, *pass_len);
         data->cached_passphrase[*pass_len] = '\0';
         data->cached_passphrase_len = *pass_len;
     }

     return ret;
 }

 static int ossl_pw_get_password(char *buf, int size, int rwflag,
                                 void *userdata, const char *info)
 {
     size_t password_len = 0;
     OSSL_PARAM params[] = {
         OSSL_PARAM_utf8_string(OSSL_PASSPHRASE_PARAM_INFO, NULL, 0),
         OSSL_PARAM_END
     };

     params[0].data = (void *)info;
     if (ossl_pw_get_passphrase(buf, (size_t)size, &password_len, params,
                                rwflag, userdata))
         return (int)password_len;
     return -1;
 }

 int ossl_pw_pem_password(char *buf, int size, int rwflag, void *userdata)
 {
     return ossl_pw_get_password(buf, size, rwflag, userdata, "PEM");
 }

 int ossl_pw_pvk_password(char *buf, int size, int rwflag, void *userdata)
 {
     return ossl_pw_get_password(buf, size, rwflag, userdata, "PVK");
 }

 int ossl_pw_passphrase_callback_enc(char *pass, size_t pass_size,
                                     size_t *pass_len,
                                     const OSSL_PARAM params[], void *arg)
 {
     return ossl_pw_get_passphrase(pass, pass_size, pass_len, params, 1, arg);
 }

 int ossl_pw_passphrase_callback_dec(char *pass, size_t pass_size,
                                     size_t *pass_len,
                                     const OSSL_PARAM params[], void *arg)
 {
     return ossl_pw_get_passphrase(pass, pass_size, pass_len, params, 0, arg);
 }
	/*
	* Copyright 2020-2022 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/err.h>
	#include <openssl/ui.h>
	#include <openssl/core_names.h>
	#include "internal/cryptlib.h"
	#include "internal/passphrase.h"

	void ossl_pw_clear_passphrase_data(struct ossl_passphrase_data_st *data)
	{
	if (data != NULL) {
	if (data->type == is_expl_passphrase)
	OPENSSL_clear_free(data->_.expl_passphrase.passphrase_copy,
	data->_.expl_passphrase.passphrase_len);
	ossl_pw_clear_passphrase_cache(data);
	memset(data, 0, sizeof(*data));
	}
	}

	void ossl_pw_clear_passphrase_cache(struct ossl_passphrase_data_st *data)
	{
	OPENSSL_clear_free(data->cached_passphrase, data->cached_passphrase_len);
	data->cached_passphrase = NULL;
	}

	int ossl_pw_set_passphrase(struct ossl_passphrase_data_st *data,
	const unsigned char *passphrase,
	size_t passphrase_len)
	{
	if (!ossl_assert(data != NULL && passphrase != NULL)) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
	return 0;
	}
	ossl_pw_clear_passphrase_data(data);
	data->type = is_expl_passphrase;
	data->_.expl_passphrase.passphrase_copy =
	passphrase_len != 0 ? OPENSSL_memdup(passphrase, passphrase_len)
	: OPENSSL_malloc(1);
	if (data->_.expl_passphrase.passphrase_copy == NULL) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
	return 0;
	}
	data->_.expl_passphrase.passphrase_len = passphrase_len;
	return 1;
	}

	int ossl_pw_set_pem_password_cb(struct ossl_passphrase_data_st *data,
	pem_password_cb cb, void cbarg)
	{
	if (!ossl_assert(data != NULL && cb != NULL)) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
	return 0;
	}
	ossl_pw_clear_passphrase_data(data);
	data->type = is_pem_password;
	data->_.pem_password.password_cb = cb;
	data->_.pem_password.password_cbarg = cbarg;
	return 1;
	}

	int ossl_pw_set_ossl_passphrase_cb(struct ossl_passphrase_data_st *data,
	OSSL_PASSPHRASE_CALLBACK cb, void cbarg)
	{
	if (!ossl_assert(data != NULL && cb != NULL)) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
	return 0;
	}
	ossl_pw_clear_passphrase_data(data);
	data->type = is_ossl_passphrase;
	data->_.ossl_passphrase.passphrase_cb = cb;
	data->_.ossl_passphrase.passphrase_cbarg = cbarg;
	return 1;
	}

	int ossl_pw_set_ui_method(struct ossl_passphrase_data_st *data,
	const UI_METHOD ui_method, void ui_data)
	{
	if (!ossl_assert(data != NULL && ui_method != NULL)) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
	return 0;
	}
	ossl_pw_clear_passphrase_data(data);
	data->type = is_ui_method;
	data->_.ui_method.ui_method = ui_method;
	data->_.ui_method.ui_method_data = ui_data;
	return 1;
	}

	int ossl_pw_enable_passphrase_caching(struct ossl_passphrase_data_st *data)
	{
	data->flag_cache_passphrase = 1;
	return 1;
	}

	int ossl_pw_disable_passphrase_caching(struct ossl_passphrase_data_st *data)
	{
	data->flag_cache_passphrase = 0;
	return 1;
	}


	/*-
	* UI_METHOD processor. It differs from UI_UTIL_read_pw() like this:
	*
	* 1. It constructs a prompt on its own, based on \|prompt_info\|.
	* 2. It allocates a buffer for password and verification on its own
	* to compensate for NUL terminator in UI password strings.
	* 3. It raises errors.
	* 4. It reports back the length of the prompted pass phrase.
	*/
	static int do_ui_passphrase(char pass, size_t pass_size, size_t pass_len,
	const char *prompt_info, int verify,
	const UI_METHOD ui_method, void ui_data)
	{
	char prompt = NULL, ipass = NULL, *vpass = NULL;
	int prompt_idx = -1, verify_idx = -1, res;
	UI *ui = NULL;
	int ret = 0;

	if (!ossl_assert(pass != NULL && pass_size != 0 && pass_len != NULL)) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
	return 0;
	}

	if ((ui = UI_new()) == NULL) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
	return 0;
	}

	if (ui_method != NULL) {
	UI_set_method(ui, ui_method);
	if (ui_data != NULL)
	UI_add_user_data(ui, ui_data);
	}

	/* Get an application constructed prompt */
	prompt = UI_construct_prompt(ui, "pass phrase", prompt_info);
	if (prompt == NULL) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
	goto end;
	}

	/* Get a buffer for verification prompt */
	ipass = OPENSSL_zalloc(pass_size + 1);
	if (ipass == NULL) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
	goto end;
	}

	prompt_idx = UI_add_input_string(ui, prompt,
	UI_INPUT_FLAG_DEFAULT_PWD,
	ipass, 0, pass_size) - 1;
	if (prompt_idx < 0) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
	goto end;
	}

	if (verify) {
	/* Get a buffer for verification prompt */
	vpass = OPENSSL_zalloc(pass_size + 1);
	if (vpass == NULL) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
	goto end;
	}
	verify_idx = UI_add_verify_string(ui, prompt,
	UI_INPUT_FLAG_DEFAULT_PWD,
	vpass, 0, pass_size,
	ipass) - 1;
	if (verify_idx < 0) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
	goto end;
	}
	}

	switch (UI_process(ui)) {
	case -2:
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERRUPTED_OR_CANCELLED);
	break;
	case -1:
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
	break;
	default:
	res = UI_get_result_length(ui, prompt_idx);
	if (res < 0) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
	break;
	}
	*pass_len = (size_t)res;
	memcpy(pass, ipass, *pass_len);
	ret = 1;
	break;
	}

	end:
	OPENSSL_clear_free(vpass, pass_size + 1);
	OPENSSL_clear_free(ipass, pass_size + 1);
	OPENSSL_free(prompt);
	UI_free(ui);
	return ret;
	}

	/* Central pw prompting dispatcher */
	int ossl_pw_get_passphrase(char pass, size_t pass_size, size_t pass_len,
	const OSSL_PARAM params[], int verify,
	struct ossl_passphrase_data_st *data)
	{
	const char *source = NULL;
	size_t source_len = 0;
	const char *prompt_info = NULL;
	const UI_METHOD *ui_method = NULL;
	UI_METHOD *allocated_ui_method = NULL;
	void *ui_data = NULL;
	const OSSL_PARAM *p = NULL;
	int ret;

	/* Handle explicit and cached passphrases */

	if (data->type == is_expl_passphrase) {
	source = data->_.expl_passphrase.passphrase_copy;
	source_len = data->_.expl_passphrase.passphrase_len;
	} else if (data->flag_cache_passphrase && data->cached_passphrase != NULL) {
	source = data->cached_passphrase;
	source_len = data->cached_passphrase_len;
	}

	if (source != NULL) {
	if (source_len > pass_size)
	source_len = pass_size;
	memcpy(pass, source, source_len);
	*pass_len = source_len;
	return 1;
	}

	/* Handle the is_ossl_passphrase case... that's pretty direct */

	if (data->type == is_ossl_passphrase) {
	OSSL_PASSPHRASE_CALLBACK *cb = data->_.ossl_passphrase.passphrase_cb;
	void *cbarg = data->_.ossl_passphrase.passphrase_cbarg;

	ret = cb(pass, pass_size, pass_len, params, cbarg);
	goto do_cache;
	}

	/* Handle the is_pem_password and is_ui_method cases */

	if ((p = OSSL_PARAM_locate_const(params,
	OSSL_PASSPHRASE_PARAM_INFO)) != NULL) {
	if (p->data_type != OSSL_PARAM_UTF8_STRING) {
	ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_PASSED_INVALID_ARGUMENT,
	"Prompt info data type incorrect");
	return 0;
	}
	prompt_info = p->data;
	}

	if (data->type == is_pem_password) {
	/* We use a UI wrapper for PEM */
	pem_password_cb *cb = data->_.pem_password.password_cb;

	ui_method = allocated_ui_method =
	UI_UTIL_wrap_read_pem_callback(cb, verify);
	ui_data = data->_.pem_password.password_cbarg;

	if (ui_method == NULL) {
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
	return 0;
	}
	} else if (data->type == is_ui_method) {
	ui_method = data->_.ui_method.ui_method;
	ui_data = data->_.ui_method.ui_method_data;
	}

	if (ui_method == NULL) {
	ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_PASSED_INVALID_ARGUMENT,
	"No password method specified");
	return 0;
	}

	ret = do_ui_passphrase(pass, pass_size, pass_len, prompt_info, verify,
	ui_method, ui_data);

	UI_destroy_method(allocated_ui_method);

	do_cache:
	if (ret && data->flag_cache_passphrase) {
	if (data->cached_passphrase == NULL
	\|\| *pass_len > data->cached_passphrase_len) {
	void *new_cache =
	OPENSSL_clear_realloc(data->cached_passphrase,
	data->cached_passphrase_len,
	*pass_len + 1);

	if (new_cache == NULL) {
	OPENSSL_cleanse(pass, *pass_len);
	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
	return 0;
	}
	data->cached_passphrase = new_cache;
	}
	memcpy(data->cached_passphrase, pass, *pass_len);
	data->cached_passphrase[*pass_len] = '\0';
	data->cached_passphrase_len = *pass_len;
	}

	return ret;
	}

	static int ossl_pw_get_password(char *buf, int size, int rwflag,
	void userdata, const char info)
	{
	size_t password_len = 0;
	OSSL_PARAM params[] = {
	OSSL_PARAM_utf8_string(OSSL_PASSPHRASE_PARAM_INFO, NULL, 0),
	OSSL_PARAM_END
	};

	params[0].data = (void *)info;
	if (ossl_pw_get_passphrase(buf, (size_t)size, &password_len, params,
	rwflag, userdata))
	return (int)password_len;
	return -1;
	}

	int ossl_pw_pem_password(char buf, int size, int rwflag, void userdata)
	{
	return ossl_pw_get_password(buf, size, rwflag, userdata, "PEM");
	}

	int ossl_pw_pvk_password(char buf, int size, int rwflag, void userdata)
	{
	return ossl_pw_get_password(buf, size, rwflag, userdata, "PVK");
	}

	int ossl_pw_passphrase_callback_enc(char *pass, size_t pass_size,
	size_t *pass_len,
	const OSSL_PARAM params[], void *arg)
	{
	return ossl_pw_get_passphrase(pass, pass_size, pass_len, params, 1, arg);
	}

	int ossl_pw_passphrase_callback_dec(char *pass, size_t pass_size,
	size_t *pass_len,
	const OSSL_PARAM params[], void *arg)
	{
	return ossl_pw_get_passphrase(pass, pass_size, pass_len, params, 0, arg);
	}