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Diffstat (limited to 'include/openssl/ui.h.in')
| -rw-r--r-- | include/openssl/ui.h.in | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/include/openssl/ui.h.in b/include/openssl/ui.h.in new file mode 100644 index 00000000..eb9a580f --- /dev/null +++ b/include/openssl/ui.h.in @@ -0,0 +1,384 @@ +/* + * {- join("\n * ", @autowarntext) -} + * + * Copyright 2001-2020 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 + */ + +{- +use OpenSSL::stackhash qw(generate_stack_macros); +-} + +#ifndef OPENSSL_UI_H +# define OPENSSL_UI_H +# pragma once + +# include <openssl/macros.h> +# ifndef OPENSSL_NO_DEPRECATED_3_0 +# define HEADER_UI_H +# endif + +# include <openssl/opensslconf.h> + +# ifndef OPENSSL_NO_DEPRECATED_1_1_0 +# include <openssl/crypto.h> +# endif +# include <openssl/safestack.h> +# include <openssl/pem.h> +# include <openssl/types.h> +# include <openssl/uierr.h> + +/* For compatibility reasons, the macro OPENSSL_NO_UI is currently retained */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +# ifdef OPENSSL_NO_UI_CONSOLE +# define OPENSSL_NO_UI +# endif +# endif + +# ifdef __cplusplus +extern "C" { +# endif + +/* + * All the following functions return -1 or NULL on error and in some cases + * (UI_process()) -2 if interrupted or in some other way cancelled. When + * everything is fine, they return 0, a positive value or a non-NULL pointer, + * all depending on their purpose. + */ + +/* Creators and destructor. */ +UI *UI_new(void); +UI *UI_new_method(const UI_METHOD *method); +void UI_free(UI *ui); + +/*- + The following functions are used to add strings to be printed and prompt + strings to prompt for data. The names are UI_{add,dup}_<function>_string + and UI_{add,dup}_input_boolean. + + UI_{add,dup}_<function>_string have the following meanings: + add add a text or prompt string. The pointers given to these + functions are used verbatim, no copying is done. + dup make a copy of the text or prompt string, then add the copy + to the collection of strings in the user interface. + <function> + The function is a name for the functionality that the given + string shall be used for. It can be one of: + input use the string as data prompt. + verify use the string as verification prompt. This + is used to verify a previous input. + info use the string for informational output. + error use the string for error output. + Honestly, there's currently no difference between info and error for the + moment. + + UI_{add,dup}_input_boolean have the same semantics for "add" and "dup", + and are typically used when one wants to prompt for a yes/no response. + + All of the functions in this group take a UI and a prompt string. + The string input and verify addition functions also take a flag argument, + a buffer for the result to end up with, a minimum input size and a maximum + input size (the result buffer MUST be large enough to be able to contain + the maximum number of characters). Additionally, the verify addition + functions takes another buffer to compare the result against. + The boolean input functions take an action description string (which should + be safe to ignore if the expected user action is obvious, for example with + a dialog box with an OK button and a Cancel button), a string of acceptable + characters to mean OK and to mean Cancel. The two last strings are checked + to make sure they don't have common characters. Additionally, the same + flag argument as for the string input is taken, as well as a result buffer. + The result buffer is required to be at least one byte long. Depending on + the answer, the first character from the OK or the Cancel character strings + will be stored in the first byte of the result buffer. No NUL will be + added, so the result is *not* a string. + + On success, the all return an index of the added information. That index + is useful when retrieving results with UI_get0_result(). */ +int UI_add_input_string(UI *ui, const char *prompt, int flags, + char *result_buf, int minsize, int maxsize); +int UI_dup_input_string(UI *ui, const char *prompt, int flags, + char *result_buf, int minsize, int maxsize); +int UI_add_verify_string(UI *ui, const char *prompt, int flags, + char *result_buf, int minsize, int maxsize, + const char *test_buf); +int UI_dup_verify_string(UI *ui, const char *prompt, int flags, + char *result_buf, int minsize, int maxsize, + const char *test_buf); +int UI_add_input_boolean(UI *ui, const char *prompt, const char *action_desc, + const char *ok_chars, const char *cancel_chars, + int flags, char *result_buf); +int UI_dup_input_boolean(UI *ui, const char *prompt, const char *action_desc, + const char *ok_chars, const char *cancel_chars, + int flags, char *result_buf); +int UI_add_info_string(UI *ui, const char *text); +int UI_dup_info_string(UI *ui, const char *text); +int UI_add_error_string(UI *ui, const char *text); +int UI_dup_error_string(UI *ui, const char *text); + +/* These are the possible flags. They can be or'ed together. */ +/* Use to have echoing of input */ +# define UI_INPUT_FLAG_ECHO 0x01 +/* + * Use a default password. Where that password is found is completely up to + * the application, it might for example be in the user data set with + * UI_add_user_data(). It is not recommended to have more than one input in + * each UI being marked with this flag, or the application might get + * confused. + */ +# define UI_INPUT_FLAG_DEFAULT_PWD 0x02 + +/*- + * The user of these routines may want to define flags of their own. The core + * UI won't look at those, but will pass them on to the method routines. They + * must use higher bits so they don't get confused with the UI bits above. + * UI_INPUT_FLAG_USER_BASE tells which is the lowest bit to use. A good + * example of use is this: + * + * #define MY_UI_FLAG1 (0x01 << UI_INPUT_FLAG_USER_BASE) + * +*/ +# define UI_INPUT_FLAG_USER_BASE 16 + +/*- + * The following function helps construct a prompt. + * phrase_desc is a textual short description of the phrase to enter, + * for example "pass phrase", and + * object_name is the name of the object + * (which might be a card name or a file name) or NULL. + * The returned string shall always be allocated on the heap with + * OPENSSL_malloc(), and need to be free'd with OPENSSL_free(). + * + * If the ui_method doesn't contain a pointer to a user-defined prompt + * constructor, a default string is built, looking like this: + * + * "Enter {phrase_desc} for {object_name}:" + * + * So, if phrase_desc has the value "pass phrase" and object_name has + * the value "foo.key", the resulting string is: + * + * "Enter pass phrase for foo.key:" +*/ +char *UI_construct_prompt(UI *ui_method, + const char *phrase_desc, const char *object_name); + +/* + * The following function is used to store a pointer to user-specific data. + * Any previous such pointer will be returned and replaced. + * + * For callback purposes, this function makes a lot more sense than using + * ex_data, since the latter requires that different parts of OpenSSL or + * applications share the same ex_data index. + * + * Note that the UI_OpenSSL() method completely ignores the user data. Other + * methods may not, however. + */ +void *UI_add_user_data(UI *ui, void *user_data); +/* + * Alternatively, this function is used to duplicate the user data. + * This uses the duplicator method function. The destroy function will + * be used to free the user data in this case. + */ +int UI_dup_user_data(UI *ui, void *user_data); +/* We need a user data retrieving function as well. */ +void *UI_get0_user_data(UI *ui); + +/* Return the result associated with a prompt given with the index i. */ +const char *UI_get0_result(UI *ui, int i); +int UI_get_result_length(UI *ui, int i); + +/* When all strings have been added, process the whole thing. */ +int UI_process(UI *ui); + +/* + * Give a user interface parameterised control commands. This can be used to + * send down an integer, a data pointer or a function pointer, as well as be + * used to get information from a UI. + */ +int UI_ctrl(UI *ui, int cmd, long i, void *p, void (*f) (void)); + +/* The commands */ +/* + * Use UI_CONTROL_PRINT_ERRORS with the value 1 to have UI_process print the + * OpenSSL error stack before printing any info or added error messages and + * before any prompting. + */ +# define UI_CTRL_PRINT_ERRORS 1 +/* + * Check if a UI_process() is possible to do again with the same instance of + * a user interface. This makes UI_ctrl() return 1 if it is redoable, and 0 + * if not. + */ +# define UI_CTRL_IS_REDOABLE 2 + +/* Some methods may use extra data */ +# define UI_set_app_data(s,arg) UI_set_ex_data(s,0,arg) +# define UI_get_app_data(s) UI_get_ex_data(s,0) + +# define UI_get_ex_new_index(l, p, newf, dupf, freef) \ + CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_UI, l, p, newf, dupf, freef) +int UI_set_ex_data(UI *r, int idx, void *arg); +void *UI_get_ex_data(const UI *r, int idx); + +/* Use specific methods instead of the built-in one */ +void UI_set_default_method(const UI_METHOD *meth); +const UI_METHOD *UI_get_default_method(void); +const UI_METHOD *UI_get_method(UI *ui); +const UI_METHOD *UI_set_method(UI *ui, const UI_METHOD *meth); + +# ifndef OPENSSL_NO_UI_CONSOLE + +/* The method with all the built-in thingies */ +UI_METHOD *UI_OpenSSL(void); + +# endif + +/* + * NULL method. Literally does nothing, but may serve as a placeholder + * to avoid internal default. + */ +const UI_METHOD *UI_null(void); + +/* ---------- For method writers ---------- */ +/*- + A method contains a number of functions that implement the low level + of the User Interface. The functions are: + + an opener This function starts a session, maybe by opening + a channel to a tty, or by opening a window. + a writer This function is called to write a given string, + maybe to the tty, maybe as a field label in a + window. + a flusher This function is called to flush everything that + has been output so far. It can be used to actually + display a dialog box after it has been built. + a reader This function is called to read a given prompt, + maybe from the tty, maybe from a field in a + window. Note that it's called with all string + structures, not only the prompt ones, so it must + check such things itself. + a closer This function closes the session, maybe by closing + the channel to the tty, or closing the window. + + All these functions are expected to return: + + 0 on error. + 1 on success. + -1 on out-of-band events, for example if some prompting has + been canceled (by pressing Ctrl-C, for example). This is + only checked when returned by the flusher or the reader. + + The way this is used, the opener is first called, then the writer for all + strings, then the flusher, then the reader for all strings and finally the + closer. Note that if you want to prompt from a terminal or other command + line interface, the best is to have the reader also write the prompts + instead of having the writer do it. If you want to prompt from a dialog + box, the writer can be used to build up the contents of the box, and the + flusher to actually display the box and run the event loop until all data + has been given, after which the reader only grabs the given data and puts + them back into the UI strings. + + All method functions take a UI as argument. Additionally, the writer and + the reader take a UI_STRING. +*/ + +/* + * The UI_STRING type is the data structure that contains all the needed info + * about a string or a prompt, including test data for a verification prompt. + */ +typedef struct ui_string_st UI_STRING; + +{- + generate_stack_macros("UI_STRING"); +-} + +/* + * The different types of strings that are currently supported. This is only + * needed by method authors. + */ +enum UI_string_types { + UIT_NONE = 0, + UIT_PROMPT, /* Prompt for a string */ + UIT_VERIFY, /* Prompt for a string and verify */ + UIT_BOOLEAN, /* Prompt for a yes/no response */ + UIT_INFO, /* Send info to the user */ + UIT_ERROR /* Send an error message to the user */ +}; + +/* Create and manipulate methods */ +UI_METHOD *UI_create_method(const char *name); +void UI_destroy_method(UI_METHOD *ui_method); +int UI_method_set_opener(UI_METHOD *method, int (*opener) (UI *ui)); +int UI_method_set_writer(UI_METHOD *method, + int (*writer) (UI *ui, UI_STRING *uis)); +int UI_method_set_flusher(UI_METHOD *method, int (*flusher) (UI *ui)); +int UI_method_set_reader(UI_METHOD *method, + int (*reader) (UI *ui, UI_STRING *uis)); +int UI_method_set_closer(UI_METHOD *method, int (*closer) (UI *ui)); +int UI_method_set_data_duplicator(UI_METHOD *method, + void *(*duplicator) (UI *ui, void *ui_data), + void (*destructor)(UI *ui, void *ui_data)); +int UI_method_set_prompt_constructor(UI_METHOD *method, + char *(*prompt_constructor) (UI *ui, + const char + *phrase_desc, + const char + *object_name)); +int UI_method_set_ex_data(UI_METHOD *method, int idx, void *data); +int (*UI_method_get_opener(const UI_METHOD *method)) (UI *); +int (*UI_method_get_writer(const UI_METHOD *method)) (UI *, UI_STRING *); +int (*UI_method_get_flusher(const UI_METHOD *method)) (UI *); +int (*UI_method_get_reader(const UI_METHOD *method)) (UI *, UI_STRING *); +int (*UI_method_get_closer(const UI_METHOD *method)) (UI *); +char *(*UI_method_get_prompt_constructor(const UI_METHOD *method)) + (UI *, const char *, const char *); +void *(*UI_method_get_data_duplicator(const UI_METHOD *method)) (UI *, void *); +void (*UI_method_get_data_destructor(const UI_METHOD *method)) (UI *, void *); +const void *UI_method_get_ex_data(const UI_METHOD *method, int idx); + +/* + * The following functions are helpers for method writers to access relevant + * data from a UI_STRING. + */ + +/* Return type of the UI_STRING */ +enum UI_string_types UI_get_string_type(UI_STRING *uis); +/* Return input flags of the UI_STRING */ +int UI_get_input_flags(UI_STRING *uis); +/* Return the actual string to output (the prompt, info or error) */ +const char *UI_get0_output_string(UI_STRING *uis); +/* + * Return the optional action string to output (the boolean prompt + * instruction) + */ +const char *UI_get0_action_string(UI_STRING *uis); +/* Return the result of a prompt */ +const char *UI_get0_result_string(UI_STRING *uis); +int UI_get_result_string_length(UI_STRING *uis); +/* + * Return the string to test the result against. Only useful with verifies. + */ +const char *UI_get0_test_string(UI_STRING *uis); +/* Return the required minimum size of the result */ +int UI_get_result_minsize(UI_STRING *uis); +/* Return the required maximum size of the result */ +int UI_get_result_maxsize(UI_STRING *uis); +/* Set the result of a UI_STRING. */ +int UI_set_result(UI *ui, UI_STRING *uis, const char *result); +int UI_set_result_ex(UI *ui, UI_STRING *uis, const char *result, int len); + +/* A couple of popular utility functions */ +int UI_UTIL_read_pw_string(char *buf, int length, const char *prompt, + int verify); +int UI_UTIL_read_pw(char *buf, char *buff, int size, const char *prompt, + int verify); +UI_METHOD *UI_UTIL_wrap_read_pem_callback(pem_password_cb *cb, int rwflag); + + +# ifdef __cplusplus +} +# endif +#endif |