Make sure that the signal storage is regarded as volatile.
[openssl.git] / crypto / ui / ui_openssl.c
index 63dc3713e45d778505470e5e5df54c91e2592718..f47ed31cb02476344f1bd000b6a4b12356fffc0a 100644 (file)
@@ -1,9 +1,9 @@
 /* crypto/ui/ui_openssl.c -*- mode:C; c-file-style: "eay" -*- */
-/* Written by Richard Levitte (levitte@stacken.kth.se) and others
- * for the OpenSSL project 2000/2001.
+/* Written by Richard Levitte (richard@levitte.org) and others
+ * 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
 #include <signal.h>
 #include <stdio.h>
 #include <string.h>
-#include <setjmp.h>
 #include <errno.h>
 
 #ifdef OPENSSL_SYS_VMS         /* prototypes for sys$whatever */
 # define SGTTY
 #endif
 
+#if defined(OPENSSL_SYS_VSWORKS)
+#undef TERMIOS
+#undef TERMIO
+#undef SGTTY
+#endif
+
 #ifdef TERMIOS
 # include <termios.h>
 # define TTY_STRUCT            struct termios
@@ -256,7 +261,6 @@ static struct sigaction savsig[NX509_SIG];
 #else
 static void (*savsig[NX509_SIG])(int );
 #endif
-static jmp_buf save;
 
 #ifdef OPENSSL_SYS_VMS
 static struct IOSB iosb;
@@ -265,7 +269,7 @@ static long tty_orig[3], tty_new[3]; /* XXX   Is there any guarantee that this w
 static long status;
 static unsigned short channel = 0;
 #else
-#ifndef OPENSSL_SYS_MSDOS
+#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
 static TTY_STRUCT tty_orig,tty_new;
 #endif
 #endif
@@ -280,9 +284,10 @@ static void popsig(void);
 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
 static int noecho_fgets(char *buf, int size, FILE *tty);
 #endif
-static int read_string_inner(UI *ui, UI_STRING *uis, int echo);
+static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
 
 static int read_string(UI *ui, UI_STRING *uis);
+static int write_string(UI *ui, UI_STRING *uis);
 
 static int open_console(UI *ui);
 static int echo_console(UI *ui);
@@ -293,9 +298,11 @@ static UI_METHOD ui_openssl =
        {
        "OpenSSL default user interface",
        open_console,
+       write_string,
+       NULL,                   /* No flusher is needed for command lines */
        read_string,
-       NULL,                   /* The reader function writes as well */
        close_console,
+       NULL
        };
 
 /* The method with all the built-in thingies */
@@ -304,30 +311,47 @@ UI_METHOD *UI_OpenSSL(void)
        return &ui_openssl;
        }
 
-static int read_string(UI *ui, UI_STRING *uis)
+/* The following function makes sure that info and error strings are printed
+   before any prompt. */
+static int write_string(UI *ui, UI_STRING *uis)
        {
        switch (UI_get_string_type(uis))
                {
-       case UI_VERIFY_NOECHO:
-               fprintf(tty_out,"Verifying - %s",
-                       UI_get0_output_string(uis));
+       case UIT_ERROR:
+       case UIT_INFO:
+               fputs(UI_get0_output_string(uis), tty_out);
                fflush(tty_out);
-               if (read_string_inner(ui, uis, 0) == 0)
-                       return 0;
-               if (strcmp(UI_get0_result_string(uis),
-                       UI_get0_test_string(uis)) != 0)
-                       {
-                       fprintf(tty_out,"Verify failure\n");
-                       fflush(tty_out);
-                       return 0;
-                       }
                break;
-       case UI_VERIFY_ECHO:
+       default:
+               break;
+               }
+       return 1;
+       }
+
+static int read_string(UI *ui, UI_STRING *uis)
+       {
+       int ok = 0;
+
+       switch (UI_get_string_type(uis))
+               {
+       case UIT_BOOLEAN:
+               fputs(UI_get0_output_string(uis), tty_out);
+               fputs(UI_get0_action_string(uis), tty_out);
+               fflush(tty_out);
+               return read_string_inner(ui, uis,
+                       UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);
+       case UIT_PROMPT:
+               fputs(UI_get0_output_string(uis), tty_out);
+               fflush(tty_out);
+               return read_string_inner(ui, uis,
+                       UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);
+       case UIT_VERIFY:
                fprintf(tty_out,"Verifying - %s",
                        UI_get0_output_string(uis));
                fflush(tty_out);
-               if (read_string_inner(ui, uis, 1) == 0)
-                       return 0;
+               if ((ok = read_string_inner(ui, uis,
+                       UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1)) <= 0)
+                       return ok;
                if (strcmp(UI_get0_result_string(uis),
                        UI_get0_test_string(uis)) != 0)
                        {
@@ -336,17 +360,7 @@ static int read_string(UI *ui, UI_STRING *uis)
                        return 0;
                        }
                break;
-       case UI_STRING_NOECHO:
-               fputs(UI_get0_output_string(uis), tty_out);
-               fflush(tty_out);
-               return read_string_inner(ui, uis, 0);
-       case UI_STRING_ECHO:
-               fputs(UI_get0_output_string(uis), tty_out);
-               fflush(tty_out);
-               return read_string_inner(ui, uis, 1);
        default:
-               fputs(UI_get0_output_string(uis), tty_out);
-               fflush(tty_out);
                break;
                }
        return 1;
@@ -364,64 +378,68 @@ static void read_till_nl(FILE *in)
                } while (strchr(buf,'\n') == NULL);
        }
 
-static int read_string_inner(UI *ui, UI_STRING *uis, int echo)
+static volatile sig_atomic_t intr_signal;
+
+static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
        {
        static int ps;
        int ok;
-       char *result = OPENSSL_malloc(BUFSIZ);
+       char result[BUFSIZ];
        int maxsize = BUFSIZ-1;
+       char *p;
 
 #ifndef OPENSSL_SYS_WIN16
-       if (setjmp(save))
-               {
-               ok=0;
-               goto error;
-               }
+       intr_signal=0;
        ok=0;
        ps=0;
 
        pushsig();
        ps=1;
 
-       if (!echo) noecho_console(ui);
+       if (!echo && !noecho_console(ui))
+               goto error;
        ps=2;
 
-       while (!ok)
-               {
-               char *p;
-
-               result[0]='\0';
+       result[0]='\0';
 #ifdef OPENSSL_SYS_MSDOS
-               if (!echo)
-                       noecho_fgets(result,maxsize,tty_in);
-               else
-                       fgets(result,maxsize,tty_in);
+       if (!echo)
+               {
+               noecho_fgets(result,maxsize,tty_in);
+               p=result; /* FIXME: noecho_fgets doesn't return errors */
+               }
+       else
+               p=fgets(result,maxsize,tty_in);
 #else
-               fgets(result,maxsize,tty_in);
+       p=fgets(result,maxsize,tty_in);
 #endif
-               if (feof(tty_in)) goto error;
-               if (ferror(tty_in)) goto error;
-               if ((p=(char *)strchr(result,'\n')) != NULL)
+       if(!p)
+               goto error;
+       if (feof(tty_in)) goto error;
+       if (ferror(tty_in)) goto error;
+       if ((p=(char *)strchr(result,'\n')) != NULL)
+               {
+               if (strip_nl)
                        *p='\0';
-               else
-                       read_till_nl(tty_in);
-               if (UI_set_result(uis, result) >= 0)
-                       ok=1;
                }
+       else
+               read_till_nl(tty_in);
+       if (UI_set_result(ui, uis, result) >= 0)
+               ok=1;
 
 error:
+       if (intr_signal == SIGINT)
+               ok=-1;
        if (!echo) fprintf(tty_out,"\n");
-       if (ps >= 2 && !echo)
-               echo_console(ui);
+       if (ps >= 2 && !echo && !echo_console(ui))
+               ok=0;
 
        if (ps >= 1)
                popsig();
 #else
-       memset(result,0,BUFSIZ);
        ok=1;
 #endif
 
-       OPENSSL_free(result);
+       memset(result,0,BUFSIZ);
        return ok;
        }
 
@@ -432,17 +450,22 @@ static int open_console(UI *ui)
        CRYPTO_w_lock(CRYPTO_LOCK_UI);
        is_a_tty = 1;
 
-#if defined(OPENSSL_SYS_MACINTOSH_CLASSIC)
+#if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(OPENSSL_SYS_VSWORKS)
        tty_in=stdin;
        tty_out=stderr;
 #else
-       if ((tty_in=fopen("/dev/tty","r")) == NULL)
+#  ifdef OPENSSL_SYS_MSDOS
+#    define DEV_TTY "con"
+#  else
+#    define DEV_TTY "/dev/tty"
+#  endif
+       if ((tty_in=fopen(DEV_TTY,"r")) == NULL)
                tty_in=stdin;
-       if ((tty_out=fopen("/dev/tty","w")) == NULL)
+       if ((tty_out=fopen(DEV_TTY,"w")) == NULL)
                tty_out=stderr;
 #endif
 
-#if defined(TTY_get) && !defined(VMS)
+#if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
        if (TTY_get(fileno(tty_in),&tty_orig) == -1)
                {
 #ifdef ENOTTY
@@ -589,13 +612,9 @@ static void popsig(void)
 
 static void recsig(int i)
        {
-       longjmp(save,1);
-#ifdef LINT
-       i=i;
-#endif
+       intr_signal=i;
        }
 
-
 /* Internal functions specific for Windows */
 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
 static int noecho_fgets(char *buf, int size, FILE *tty)