/* crypto/ui/ui.h -*- mode:C; c-file-style: "eay" -*- */
-/* Written by Richard Levitte (levitte@stacken.kth.se) for the OpenSSL
- * project 2000.
+/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
+ * project 2001.
*/
/* ====================================================================
- * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 2001 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#ifndef HEADER_UI_H
#define HEADER_UI_H
+#ifndef OPENSSL_NO_DEPRECATED
#include <openssl/crypto.h>
+#endif
#include <openssl/safestack.h>
+#include <openssl/ossl_typ.h>
#ifdef __cplusplus
extern "C" {
#endif
-/* The UI type is a holder for a specific user interface session. It can
- contain an illimited number of informational or error strings as well
- as things to prompt for, both passwords (noecho mode) and others (echo
- mode), and verification of the same. All of these are called strings,
- and are further described below. */
-typedef struct ui_st UI;
-
-/* All instances of UI have a reference to a method structure, which is a
- ordered vector of functions that implement the lower level things to do.
- There is an instruction on the implementation further down, in the section
- for method implementors. */
-typedef struct ui_method_st UI_METHOD;
+/* Declared already in ossl_typ.h */
+/* typedef struct ui_st UI; */
+/* typedef struct ui_method_st UI_METHOD; */
-/* All the following functions return -1 or NULL on error. When everything is
- fine, they return 0, a positive value or a non-NULL pointer, all depending
- on their purpose. */
+/* 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,
- with the following meanings:
+/*-
+ 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
Honestly, there's currently no difference between info and error for the
moment.
- All of the functions in this group take a UI and a string. The input and
- verify addition functions also take an echo flag, 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.
+ 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 usefull when retrieving results with UI_get0_result(). */
-int UI_add_input_string(UI *ui, const char *prompt, int echo_p,
+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 echo_p,
+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 echo_p,
+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 echo_p,
+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. object_desc is a
+ * textual short description of the object, for example "pass phrase",
+ * and object_name is the name of the object (might be a card name or
+ * a file name.
+ * 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 {object_desc} for {object_name}:"
+ *
+ * So, if object_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 *object_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.
/* When all strings have been added, process the whole thing. */
int UI_process(UI *ui);
+/* Give a user interface parametrised 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)
/* ---------- For method writers ---------- */
-/* A method contains a number of functions that implement the low level
+/*-
+ 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 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 wth all string
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 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.
+ 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 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.
*/
-DECLARE_STACK_OF(UI_STRING)
typedef struct ui_string_st UI_STRING;
+DECLARE_STACK_OF(UI_STRING)
/* The different types of strings that are currently supported.
This is only needed by method authors. */
enum UI_string_types
{
- UI_NONE=0,
- UI_STRING_ECHO, /* Prompt for a string */
- UI_STRING_NOECHO, /* Prompt for a hidden string */
- UI_VERIFY_ECHO, /* Prompt for a string and verify */
- UI_VERIFY_NOECHO, /* Prompt for a hidden string and verify */
- UI_INFO, /* Send info to the user */
- UI_ERROR /* Send an error message to the user */
+ 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(void);
+UI_METHOD *UI_create_method(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_prompt_constructor(UI_METHOD *method, char *(*prompt_constructor)(UI* ui, const char* object_desc, const char* object_name));
int (*UI_method_get_opener(UI_METHOD *method))(UI*);
int (*UI_method_get_writer(UI_METHOD *method))(UI*,UI_STRING*);
+int (*UI_method_get_flusher(UI_METHOD *method))(UI*);
int (*UI_method_get_reader(UI_METHOD *method))(UI*,UI_STRING*);
int (*UI_method_get_closer(UI_METHOD *method))(UI*);
+char * (*UI_method_get_prompt_constructor(UI_METHOD *method))(UI*, const char*, const char*);
/* The following functions are helpers for method writers to access relevant
data from a UI_STRING. */
-/* Return type type of the 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 promtp 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);
/* Return the string to test the result against. Only useful with verifies. */
/* 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_STRING *uis, char *result);
+int UI_set_result(UI *ui, UI_STRING *uis, const char *result);
+
+
+/* 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);
/* BEGIN ERROR CODES */
/* Error codes for the UI functions. */
/* Function codes. */
+#define UI_F_GENERAL_ALLOCATE_BOOLEAN 108
+#define UI_F_GENERAL_ALLOCATE_PROMPT 109
#define UI_F_GENERAL_ALLOCATE_STRING 100
+#define UI_F_UI_CTRL 111
#define UI_F_UI_DUP_ERROR_STRING 101
#define UI_F_UI_DUP_INFO_STRING 102
+#define UI_F_UI_DUP_INPUT_BOOLEAN 110
#define UI_F_UI_DUP_INPUT_STRING 103
#define UI_F_UI_DUP_VERIFY_STRING 106
#define UI_F_UI_GET0_RESULT 107
#define UI_F_UI_SET_RESULT 105
/* Reason codes. */
+#define UI_R_COMMON_OK_AND_CANCEL_CHARACTERS 104
#define UI_R_INDEX_TOO_LARGE 102
#define UI_R_INDEX_TOO_SMALL 103
+#define UI_R_NO_RESULT_BUFFER 105
#define UI_R_RESULT_TOO_LARGE 100
#define UI_R_RESULT_TOO_SMALL 101
+#define UI_R_UNKNOWN_CONTROL_COMMAND 106
#ifdef __cplusplus
}
projects / openssl.git / blobdiff