2 * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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
10 #include <openssl/err.h>
11 #include <openssl/ui.h>
12 #include <openssl/core_names.h>
13 #include "internal/cryptlib.h"
14 #include "internal/passphrase.h"
16 void ossl_pw_clear_passphrase_data(struct ossl_passphrase_data_st *data)
19 if (data->type == is_expl_passphrase)
20 OPENSSL_clear_free(data->_.expl_passphrase.passphrase_copy,
21 data->_.expl_passphrase.passphrase_len);
22 ossl_pw_clear_passphrase_cache(data);
23 memset(data, 0, sizeof(*data));
27 void ossl_pw_clear_passphrase_cache(struct ossl_passphrase_data_st *data)
29 OPENSSL_clear_free(data->cached_passphrase, data->cached_passphrase_len);
30 data->cached_passphrase = NULL;
33 int ossl_pw_set_passphrase(struct ossl_passphrase_data_st *data,
34 const unsigned char *passphrase,
35 size_t passphrase_len)
37 if (!ossl_assert(data != NULL && passphrase != NULL)) {
38 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
41 ossl_pw_clear_passphrase_data(data);
42 data->type = is_expl_passphrase;
43 data->_.expl_passphrase.passphrase_copy =
44 OPENSSL_memdup(passphrase, passphrase_len);
45 if (data->_.expl_passphrase.passphrase_copy == NULL) {
46 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
49 data->_.expl_passphrase.passphrase_len = passphrase_len;
53 int ossl_pw_set_pem_password_cb(struct ossl_passphrase_data_st *data,
54 pem_password_cb *cb, void *cbarg)
56 if (!ossl_assert(data != NULL && cb != NULL)) {
57 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
60 ossl_pw_clear_passphrase_data(data);
61 data->type = is_pem_password;
62 data->_.pem_password.password_cb = cb;
63 data->_.pem_password.password_cbarg = cbarg;
67 int ossl_pw_set_ossl_passphrase_cb(struct ossl_passphrase_data_st *data,
68 OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
70 if (!ossl_assert(data != NULL && cb != NULL)) {
71 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
74 ossl_pw_clear_passphrase_data(data);
75 data->type = is_ossl_passphrase;
76 data->_.ossl_passphrase.passphrase_cb = cb;
77 data->_.ossl_passphrase.passphrase_cbarg = cbarg;
81 int ossl_pw_set_ui_method(struct ossl_passphrase_data_st *data,
82 const UI_METHOD *ui_method, void *ui_data)
84 if (!ossl_assert(data != NULL && ui_method != NULL)) {
85 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
88 ossl_pw_clear_passphrase_data(data);
89 data->type = is_ui_method;
90 data->_.ui_method.ui_method = ui_method;
91 data->_.ui_method.ui_method_data = ui_data;
95 int ossl_pw_enable_passphrase_caching(struct ossl_passphrase_data_st *data)
97 data->flag_cache_passphrase = 1;
101 int ossl_pw_disable_passphrase_caching(struct ossl_passphrase_data_st *data)
103 data->flag_cache_passphrase = 0;
109 * UI_METHOD processor. It differs from UI_UTIL_read_pw() like this:
111 * 1. It constructs a prompt on its own, based on |prompt_info|.
112 * 2. It allocates a buffer for verification on its own.
113 * 3. It raises errors.
114 * 4. It reports back the length of the prompted pass phrase.
116 static int do_ui_passphrase(char *pass, size_t pass_size, size_t *pass_len,
117 const char *prompt_info, int verify,
118 const UI_METHOD *ui_method, void *ui_data)
120 char *prompt = NULL, *vpass = NULL;
121 int prompt_idx = -1, verify_idx = -1;
125 if (!ossl_assert(pass != NULL && pass_size != 0 && pass_len != NULL)) {
126 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
130 if ((ui = UI_new()) == NULL) {
131 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
135 if (ui_method != NULL) {
136 UI_set_method(ui, ui_method);
138 UI_add_user_data(ui, ui_data);
141 /* Get an application constructed prompt */
142 prompt = UI_construct_prompt(ui, "pass phrase", prompt_info);
143 if (prompt == NULL) {
144 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
148 prompt_idx = UI_add_input_string(ui, prompt,
149 UI_INPUT_FLAG_DEFAULT_PWD,
150 pass, 0, pass_size - 1) - 1;
151 if (prompt_idx < 0) {
152 ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
157 /* Get a buffer for verification prompt */
158 vpass = OPENSSL_zalloc(pass_size);
160 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
163 verify_idx = UI_add_verify_string(ui, prompt,
164 UI_INPUT_FLAG_DEFAULT_PWD,
165 vpass, 0, pass_size - 1,
167 if (verify_idx < 0) {
168 ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
173 switch (UI_process(ui)) {
175 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERRUPTED_OR_CANCELLED);
178 ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
181 *pass_len = (size_t)UI_get_result_length(ui, prompt_idx);
188 OPENSSL_free(prompt);
193 /* Central pw prompting dispatcher */
194 int ossl_pw_get_passphrase(char *pass, size_t pass_size, size_t *pass_len,
195 const OSSL_PARAM params[], int verify,
196 struct ossl_passphrase_data_st *data)
198 const char *source = NULL;
199 size_t source_len = 0;
200 const char *prompt_info = NULL;
201 const UI_METHOD *ui_method = NULL;
202 UI_METHOD *allocated_ui_method = NULL;
203 void *ui_data = NULL;
204 const OSSL_PARAM *p = NULL;
207 /* Handle explicit and cached passphrases */
209 if (data->type == is_expl_passphrase) {
210 source = data->_.expl_passphrase.passphrase_copy;
211 source_len = data->_.expl_passphrase.passphrase_len;
212 } else if (data->flag_cache_passphrase && data->cached_passphrase != NULL) {
213 source = data->cached_passphrase;
214 source_len = data->cached_passphrase_len;
217 if (source != NULL) {
218 if (source_len > pass_size)
219 source_len = pass_size;
220 memcpy(pass, source, source_len);
221 *pass_len = source_len;
225 /* Handle the is_ossl_passphrase case... that's pretty direct */
227 if (data->type == is_ossl_passphrase) {
228 OSSL_PASSPHRASE_CALLBACK *cb = data->_.ossl_passphrase.passphrase_cb;
229 void *cbarg = data->_.ossl_passphrase.passphrase_cbarg;
231 ret = cb(pass, pass_size, pass_len, params, cbarg);
235 /* Handle the is_pem_password and is_ui_method cases */
237 if ((p = OSSL_PARAM_locate_const(params,
238 OSSL_PASSPHRASE_PARAM_INFO)) != NULL) {
239 if (p->data_type != OSSL_PARAM_UTF8_STRING) {
240 ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_PASSED_INVALID_ARGUMENT,
241 "Prompt info data type incorrect");
244 prompt_info = p->data;
247 if (data->type == is_pem_password) {
248 /* We use a UI wrapper for PEM */
249 pem_password_cb *cb = data->_.pem_password.password_cb;
251 ui_method = allocated_ui_method =
252 UI_UTIL_wrap_read_pem_callback(cb, verify);
253 ui_data = data->_.pem_password.password_cbarg;
255 if (ui_method == NULL) {
256 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
259 } else if (data->type == is_ui_method) {
260 ui_method = data->_.ui_method.ui_method;
261 ui_data = data->_.ui_method.ui_method_data;
264 if (ui_method == NULL) {
265 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
269 ret = do_ui_passphrase(pass, pass_size, pass_len, prompt_info, verify,
272 UI_destroy_method(allocated_ui_method);
275 if (ret && data->flag_cache_passphrase) {
276 if (data->cached_passphrase == NULL
277 || *pass_len > data->cached_passphrase_len) {
279 OPENSSL_clear_realloc(data->cached_passphrase,
280 data->cached_passphrase_len,
283 if (new_cache == NULL) {
284 OPENSSL_cleanse(pass, *pass_len);
285 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
288 data->cached_passphrase = new_cache;
290 memcpy(data->cached_passphrase, pass, *pass_len);
291 data->cached_passphrase[*pass_len] = '\0';
292 data->cached_passphrase_len = *pass_len;
298 int ossl_pw_pem_password(char *buf, int size, int rwflag, void *userdata)
300 size_t password_len = 0;
301 OSSL_PARAM params[] = {
302 OSSL_PARAM_utf8_string(OSSL_PASSPHRASE_PARAM_INFO, NULL, 0),
306 params[0].data = "PEM";
307 if (ossl_pw_get_passphrase(buf, (size_t)size, &password_len, params,
309 return (int)password_len;
313 int ossl_pw_passphrase_callback_enc(char *pass, size_t pass_size,
315 const OSSL_PARAM params[], void *arg)
317 return ossl_pw_get_passphrase(pass, pass_size, pass_len, params, 1, arg);
320 int ossl_pw_passphrase_callback_dec(char *pass, size_t pass_size,
322 const OSSL_PARAM params[], void *arg)
324 return ossl_pw_get_passphrase(pass, pass_size, pass_len, params, 0, arg);