mirror of
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e077455e9e
Since OPENSSL_malloc() and friends report ERR_R_MALLOC_FAILURE, and
at least handle the file name and line number they are called from,
there's no need to report ERR_R_MALLOC_FAILURE where they are called
directly, or when SSLfatal() and RLAYERfatal() is used, the reason
`ERR_R_MALLOC_FAILURE` is changed to `ERR_R_CRYPTO_LIB`.
There were a number of places where `ERR_R_MALLOC_FAILURE` was reported
even though it was a function from a different sub-system that was
called. Those places are changed to report ERR_R_{lib}_LIB, where
{lib} is the name of that sub-system.
Some of them are tricky to get right, as we have a lot of functions
that belong in the ASN1 sub-system, and all the `sk_` calls or from
the CRYPTO sub-system.
Some extra adaptation was necessary where there were custom OPENSSL_malloc()
wrappers, and some bugs are fixed alongside these changes.
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19301)
347 lines
11 KiB
C
347 lines
11 KiB
C
/*
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* Copyright 2020-2022 The OpenSSL Project Authors. 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 <openssl/err.h>
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#include <openssl/ui.h>
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#include <openssl/core_names.h>
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#include "internal/cryptlib.h"
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#include "internal/passphrase.h"
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void ossl_pw_clear_passphrase_data(struct ossl_passphrase_data_st *data)
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{
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if (data != NULL) {
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if (data->type == is_expl_passphrase)
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OPENSSL_clear_free(data->_.expl_passphrase.passphrase_copy,
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data->_.expl_passphrase.passphrase_len);
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ossl_pw_clear_passphrase_cache(data);
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memset(data, 0, sizeof(*data));
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}
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}
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void ossl_pw_clear_passphrase_cache(struct ossl_passphrase_data_st *data)
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{
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OPENSSL_clear_free(data->cached_passphrase, data->cached_passphrase_len);
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data->cached_passphrase = NULL;
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}
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int ossl_pw_set_passphrase(struct ossl_passphrase_data_st *data,
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const unsigned char *passphrase,
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size_t passphrase_len)
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{
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if (!ossl_assert(data != NULL && passphrase != 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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ossl_pw_clear_passphrase_data(data);
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data->type = is_expl_passphrase;
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data->_.expl_passphrase.passphrase_copy =
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passphrase_len != 0 ? OPENSSL_memdup(passphrase, passphrase_len)
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: OPENSSL_malloc(1);
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if (data->_.expl_passphrase.passphrase_copy == NULL)
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return 0;
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data->_.expl_passphrase.passphrase_len = passphrase_len;
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return 1;
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}
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int ossl_pw_set_pem_password_cb(struct ossl_passphrase_data_st *data,
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pem_password_cb *cb, void *cbarg)
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{
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if (!ossl_assert(data != NULL && cb != 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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ossl_pw_clear_passphrase_data(data);
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data->type = is_pem_password;
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data->_.pem_password.password_cb = cb;
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data->_.pem_password.password_cbarg = cbarg;
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return 1;
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}
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int ossl_pw_set_ossl_passphrase_cb(struct ossl_passphrase_data_st *data,
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OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
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{
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if (!ossl_assert(data != NULL && cb != 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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ossl_pw_clear_passphrase_data(data);
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data->type = is_ossl_passphrase;
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data->_.ossl_passphrase.passphrase_cb = cb;
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data->_.ossl_passphrase.passphrase_cbarg = cbarg;
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return 1;
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}
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int ossl_pw_set_ui_method(struct ossl_passphrase_data_st *data,
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const UI_METHOD *ui_method, void *ui_data)
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{
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if (!ossl_assert(data != NULL && ui_method != 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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ossl_pw_clear_passphrase_data(data);
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data->type = is_ui_method;
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data->_.ui_method.ui_method = ui_method;
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data->_.ui_method.ui_method_data = ui_data;
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return 1;
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}
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int ossl_pw_enable_passphrase_caching(struct ossl_passphrase_data_st *data)
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{
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data->flag_cache_passphrase = 1;
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return 1;
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}
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int ossl_pw_disable_passphrase_caching(struct ossl_passphrase_data_st *data)
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{
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data->flag_cache_passphrase = 0;
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return 1;
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}
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/*-
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* UI_METHOD processor. It differs from UI_UTIL_read_pw() like this:
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*
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* 1. It constructs a prompt on its own, based on |prompt_info|.
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* 2. It allocates a buffer for password and verification on its own
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* to compensate for NUL terminator in UI password strings.
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* 3. It raises errors.
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* 4. It reports back the length of the prompted pass phrase.
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*/
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static int do_ui_passphrase(char *pass, size_t pass_size, size_t *pass_len,
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const char *prompt_info, int verify,
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const UI_METHOD *ui_method, void *ui_data)
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{
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char *prompt = NULL, *ipass = NULL, *vpass = NULL;
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int prompt_idx = -1, verify_idx = -1, res;
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UI *ui = NULL;
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int ret = 0;
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if (!ossl_assert(pass != NULL && pass_size != 0 && pass_len != 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 ((ui = UI_new()) == NULL) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
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return 0;
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}
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if (ui_method != NULL) {
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UI_set_method(ui, ui_method);
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if (ui_data != NULL)
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UI_add_user_data(ui, ui_data);
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}
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/* Get an application constructed prompt */
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prompt = UI_construct_prompt(ui, "pass phrase", prompt_info);
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if (prompt == NULL) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
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goto end;
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}
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/* Get a buffer for verification prompt */
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ipass = OPENSSL_zalloc(pass_size + 1);
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if (ipass == NULL)
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goto end;
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prompt_idx = UI_add_input_string(ui, prompt,
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UI_INPUT_FLAG_DEFAULT_PWD,
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ipass, 0, pass_size) - 1;
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if (prompt_idx < 0) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
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goto end;
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}
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if (verify) {
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/* Get a buffer for verification prompt */
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vpass = OPENSSL_zalloc(pass_size + 1);
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if (vpass == NULL)
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goto end;
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verify_idx = UI_add_verify_string(ui, prompt,
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UI_INPUT_FLAG_DEFAULT_PWD,
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vpass, 0, pass_size,
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ipass) - 1;
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if (verify_idx < 0) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
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goto end;
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}
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}
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switch (UI_process(ui)) {
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case -2:
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERRUPTED_OR_CANCELLED);
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break;
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case -1:
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
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break;
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default:
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res = UI_get_result_length(ui, prompt_idx);
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if (res < 0) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
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break;
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}
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*pass_len = (size_t)res;
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memcpy(pass, ipass, *pass_len);
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ret = 1;
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break;
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}
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end:
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OPENSSL_clear_free(vpass, pass_size + 1);
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OPENSSL_clear_free(ipass, pass_size + 1);
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OPENSSL_free(prompt);
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UI_free(ui);
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return ret;
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}
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/* Central pw prompting dispatcher */
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int ossl_pw_get_passphrase(char *pass, size_t pass_size, size_t *pass_len,
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const OSSL_PARAM params[], int verify,
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struct ossl_passphrase_data_st *data)
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{
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const char *source = NULL;
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size_t source_len = 0;
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const char *prompt_info = NULL;
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const UI_METHOD *ui_method = NULL;
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UI_METHOD *allocated_ui_method = NULL;
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void *ui_data = NULL;
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const OSSL_PARAM *p = NULL;
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int ret;
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/* Handle explicit and cached passphrases */
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if (data->type == is_expl_passphrase) {
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source = data->_.expl_passphrase.passphrase_copy;
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source_len = data->_.expl_passphrase.passphrase_len;
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} else if (data->flag_cache_passphrase && data->cached_passphrase != NULL) {
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source = data->cached_passphrase;
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source_len = data->cached_passphrase_len;
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}
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if (source != NULL) {
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if (source_len > pass_size)
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source_len = pass_size;
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memcpy(pass, source, source_len);
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*pass_len = source_len;
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return 1;
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}
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/* Handle the is_ossl_passphrase case... that's pretty direct */
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if (data->type == is_ossl_passphrase) {
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OSSL_PASSPHRASE_CALLBACK *cb = data->_.ossl_passphrase.passphrase_cb;
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void *cbarg = data->_.ossl_passphrase.passphrase_cbarg;
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ret = cb(pass, pass_size, pass_len, params, cbarg);
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goto do_cache;
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}
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/* Handle the is_pem_password and is_ui_method cases */
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if ((p = OSSL_PARAM_locate_const(params,
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OSSL_PASSPHRASE_PARAM_INFO)) != NULL) {
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if (p->data_type != OSSL_PARAM_UTF8_STRING) {
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ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_PASSED_INVALID_ARGUMENT,
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"Prompt info data type incorrect");
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return 0;
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}
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prompt_info = p->data;
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}
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if (data->type == is_pem_password) {
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/* We use a UI wrapper for PEM */
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pem_password_cb *cb = data->_.pem_password.password_cb;
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ui_method = allocated_ui_method =
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UI_UTIL_wrap_read_pem_callback(cb, verify);
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ui_data = data->_.pem_password.password_cbarg;
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if (ui_method == NULL) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_UI_LIB);
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return 0;
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}
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} else if (data->type == is_ui_method) {
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ui_method = data->_.ui_method.ui_method;
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ui_data = data->_.ui_method.ui_method_data;
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}
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if (ui_method == NULL) {
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ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_PASSED_INVALID_ARGUMENT,
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"No password method specified");
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return 0;
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}
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ret = do_ui_passphrase(pass, pass_size, pass_len, prompt_info, verify,
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ui_method, ui_data);
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UI_destroy_method(allocated_ui_method);
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do_cache:
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if (ret && data->flag_cache_passphrase) {
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if (data->cached_passphrase == NULL
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|| *pass_len > data->cached_passphrase_len) {
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void *new_cache =
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OPENSSL_clear_realloc(data->cached_passphrase,
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data->cached_passphrase_len,
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*pass_len + 1);
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if (new_cache == NULL) {
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OPENSSL_cleanse(pass, *pass_len);
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return 0;
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}
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data->cached_passphrase = new_cache;
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}
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memcpy(data->cached_passphrase, pass, *pass_len);
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data->cached_passphrase[*pass_len] = '\0';
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data->cached_passphrase_len = *pass_len;
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}
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return ret;
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}
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static int ossl_pw_get_password(char *buf, int size, int rwflag,
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void *userdata, const char *info)
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{
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size_t password_len = 0;
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OSSL_PARAM params[] = {
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OSSL_PARAM_utf8_string(OSSL_PASSPHRASE_PARAM_INFO, NULL, 0),
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OSSL_PARAM_END
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};
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params[0].data = (void *)info;
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if (ossl_pw_get_passphrase(buf, (size_t)size, &password_len, params,
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rwflag, userdata))
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return (int)password_len;
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return -1;
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}
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int ossl_pw_pem_password(char *buf, int size, int rwflag, void *userdata)
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{
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return ossl_pw_get_password(buf, size, rwflag, userdata, "PEM");
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}
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int ossl_pw_pvk_password(char *buf, int size, int rwflag, void *userdata)
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{
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return ossl_pw_get_password(buf, size, rwflag, userdata, "PVK");
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}
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int ossl_pw_passphrase_callback_enc(char *pass, size_t pass_size,
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size_t *pass_len,
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const OSSL_PARAM params[], void *arg)
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{
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return ossl_pw_get_passphrase(pass, pass_size, pass_len, params, 1, arg);
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}
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int ossl_pw_passphrase_callback_dec(char *pass, size_t pass_size,
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size_t *pass_len,
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const OSSL_PARAM params[], void *arg)
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{
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return ossl_pw_get_passphrase(pass, pass_size, pass_len, params, 0, arg);
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}
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