X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fui%2Fui_lib.c;h=a3a0065279b6dbd55350f940d458a09cfbf65070;hp=1213892ad55474004b75ad499aba514ad9de3403;hb=55e0593c81f3c09218cb9e4d653bd51187fb186f;hpb=569d0646096e6c7e07b9b89b04204eef934c3b69

diff --git a/crypto/ui/ui_lib.c b/crypto/ui/ui_lib.c
index 1213892ad5..a3a0065279 100644
--- a/crypto/ui/ui_lib.c
+++ b/crypto/ui/ui_lib.c
@@ -1,7 +1,7 @@
 /*
- * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
- * Licensed under the OpenSSL license (the "License").  You may not use
+ * 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
@@ -15,11 +15,9 @@
 #include <openssl/err.h>
 #include "ui_locl.h"
 
-static const UI_METHOD *default_UI_meth = NULL;
-
 UI *UI_new(void)
 {
-    return (UI_new_method(NULL));
+    return UI_new_method(NULL);
 }
 
 UI *UI_new_method(const UI_METHOD *method)
@@ -39,9 +37,10 @@ UI *UI_new_method(const UI_METHOD *method)
     }
 
     if (method == NULL)
-        ret->meth = UI_get_default_method();
-    else
-        ret->meth = method;
+        method = UI_get_default_method();
+    if (method == NULL)
+        method = UI_null();
+    ret->meth = method;
 
     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_UI, ret, &ret->ex_data)) {
         OPENSSL_free(ret);
@@ -60,7 +59,11 @@ static void free_string(UI_STRING *uis)
             OPENSSL_free((char *)uis->_.boolean_data.ok_chars);
             OPENSSL_free((char *)uis->_.boolean_data.cancel_chars);
             break;
-        default:
+        case UIT_NONE:
+        case UIT_PROMPT:
+        case UIT_VERIFY:
+        case UIT_ERROR:
+        case UIT_INFO:
             break;
         }
     }
@@ -71,6 +74,9 @@ void UI_free(UI *ui)
 {
     if (ui == NULL)
         return;
+    if ((ui->flags & UI_FLAG_DUPL_DATA) != 0) {
+        ui->meth->ui_destroy_data(ui, ui->user_data);
+    }
     sk_UI_STRING_pop_free(ui->strings, free_string);
     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_UI, ui, &ui->ex_data);
     CRYPTO_THREAD_lock_free(ui->lock);
@@ -120,15 +126,17 @@ static int general_allocate_string(UI *ui, const char *prompt,
     UI_STRING *s = general_allocate_prompt(ui, prompt, prompt_freeable,
                                            type, input_flags, result_buf);
 
-    if (s) {
+    if (s != NULL) {
         if (allocate_string_stack(ui) >= 0) {
             s->_.string_data.result_minsize = minsize;
             s->_.string_data.result_maxsize = maxsize;
             s->_.string_data.test_buf = test_buf;
             ret = sk_UI_STRING_push(ui->strings, s);
             /* sk_push() returns 0 on error.  Let's adapt that */
-            if (ret <= 0)
+            if (ret <= 0) {
                 ret--;
+                free_string(s);
+            }
         } else
             free_string(s);
     }
@@ -153,8 +161,8 @@ static int general_allocate_boolean(UI *ui,
     } else if (cancel_chars == NULL) {
         UIerr(UI_F_GENERAL_ALLOCATE_BOOLEAN, ERR_R_PASSED_NULL_PARAMETER);
     } else {
-        for (p = ok_chars; *p; p++) {
-            if (strchr(cancel_chars, *p)) {
+        for (p = ok_chars; *p != '\0'; p++) {
+            if (strchr(cancel_chars, *p) != NULL) {
                 UIerr(UI_F_GENERAL_ALLOCATE_BOOLEAN,
                       UI_R_COMMON_OK_AND_CANCEL_CHARACTERS);
             }
@@ -163,7 +171,7 @@ static int general_allocate_boolean(UI *ui,
         s = general_allocate_prompt(ui, prompt, prompt_freeable,
                                     type, input_flags, result_buf);
 
-        if (s) {
+        if (s != NULL) {
             if (allocate_string_stack(ui) >= 0) {
                 s->_.boolean_data.action_desc = action_desc;
                 s->_.boolean_data.ok_chars = ok_chars;
@@ -172,8 +180,10 @@ static int general_allocate_boolean(UI *ui,
                 /*
                  * sk_push() returns 0 on error. Let's adapt that
                  */
-                if (ret <= 0)
+                if (ret <= 0) {
                     ret--;
+                    free_string(s);
+                }
             } else
                 free_string(s);
         }
@@ -199,7 +209,7 @@ int UI_dup_input_string(UI *ui, const char *prompt, int flags,
 {
     char *prompt_copy = NULL;
 
-    if (prompt) {
+    if (prompt != NULL) {
         prompt_copy = OPENSSL_strdup(prompt);
         if (prompt_copy == NULL) {
             UIerr(UI_F_UI_DUP_INPUT_STRING, ERR_R_MALLOC_FAILURE);
@@ -227,7 +237,7 @@ int UI_dup_verify_string(UI *ui, const char *prompt, int flags,
 {
     char *prompt_copy = NULL;
 
-    if (prompt) {
+    if (prompt != NULL) {
         prompt_copy = OPENSSL_strdup(prompt);
         if (prompt_copy == NULL) {
             UIerr(UI_F_UI_DUP_VERIFY_STRING, ERR_R_MALLOC_FAILURE);
@@ -258,7 +268,7 @@ int UI_dup_input_boolean(UI *ui, const char *prompt, const char *action_desc,
     char *ok_chars_copy = NULL;
     char *cancel_chars_copy = NULL;
 
-    if (prompt) {
+    if (prompt != NULL) {
         prompt_copy = OPENSSL_strdup(prompt);
         if (prompt_copy == NULL) {
             UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);
@@ -266,7 +276,7 @@ int UI_dup_input_boolean(UI *ui, const char *prompt, const char *action_desc,
         }
     }
 
-    if (action_desc) {
+    if (action_desc != NULL) {
         action_desc_copy = OPENSSL_strdup(action_desc);
         if (action_desc_copy == NULL) {
             UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);
@@ -274,7 +284,7 @@ int UI_dup_input_boolean(UI *ui, const char *prompt, const char *action_desc,
         }
     }
 
-    if (ok_chars) {
+    if (ok_chars != NULL) {
         ok_chars_copy = OPENSSL_strdup(ok_chars);
         if (ok_chars_copy == NULL) {
             UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);
@@ -282,7 +292,7 @@ int UI_dup_input_boolean(UI *ui, const char *prompt, const char *action_desc,
         }
     }
 
-    if (cancel_chars) {
+    if (cancel_chars != NULL) {
         cancel_chars_copy = OPENSSL_strdup(cancel_chars);
         if (cancel_chars_copy == NULL) {
             UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);
@@ -311,7 +321,7 @@ int UI_dup_info_string(UI *ui, const char *text)
 {
     char *text_copy = NULL;
 
-    if (text) {
+    if (text != NULL) {
         text_copy = OPENSSL_strdup(text);
         if (text_copy == NULL) {
             UIerr(UI_F_UI_DUP_INFO_STRING, ERR_R_MALLOC_FAILURE);
@@ -333,7 +343,7 @@ int UI_dup_error_string(UI *ui, const char *text)
 {
     char *text_copy = NULL;
 
-    if (text) {
+    if (text != NULL) {
         text_copy = OPENSSL_strdup(text);
         if (text_copy == NULL) {
             UIerr(UI_F_UI_DUP_ERROR_STRING, ERR_R_MALLOC_FAILURE);
@@ -349,7 +359,7 @@ char *UI_construct_prompt(UI *ui, const char *object_desc,
 {
     char *prompt = NULL;
 
-    if (ui->meth->ui_construct_prompt)
+    if (ui->meth->ui_construct_prompt != NULL)
         prompt = ui->meth->ui_construct_prompt(ui, object_desc, object_name);
     else {
         char prompt1[] = "Enter ";
@@ -360,16 +370,17 @@ char *UI_construct_prompt(UI *ui, const char *object_desc,
         if (object_desc == NULL)
             return NULL;
         len = sizeof(prompt1) - 1 + strlen(object_desc);
-        if (object_name)
+        if (object_name != NULL)
             len += sizeof(prompt2) - 1 + strlen(object_name);
         len += sizeof(prompt3) - 1;
 
-        prompt = OPENSSL_malloc(len + 1);
-        if (prompt == NULL)
+        if ((prompt = OPENSSL_malloc(len + 1)) == NULL) {
+            UIerr(UI_F_UI_CONSTRUCT_PROMPT, ERR_R_MALLOC_FAILURE);
             return NULL;
+        }
         OPENSSL_strlcpy(prompt, prompt1, len + 1);
         OPENSSL_strlcat(prompt, object_desc, len + 1);
-        if (object_name) {
+        if (object_name != NULL) {
             OPENSSL_strlcat(prompt, prompt2, len + 1);
             OPENSSL_strlcat(prompt, object_name, len + 1);
         }
@@ -381,10 +392,38 @@ char *UI_construct_prompt(UI *ui, const char *object_desc,
 void *UI_add_user_data(UI *ui, void *user_data)
 {
     void *old_data = ui->user_data;
+
+    if ((ui->flags & UI_FLAG_DUPL_DATA) != 0) {
+        ui->meth->ui_destroy_data(ui, old_data);
+        old_data = NULL;
+    }
     ui->user_data = user_data;
+    ui->flags &= ~UI_FLAG_DUPL_DATA;
     return old_data;
 }
 
+int UI_dup_user_data(UI *ui, void *user_data)
+{
+    void *duplicate = NULL;
+
+    if (ui->meth->ui_duplicate_data == NULL
+        || ui->meth->ui_destroy_data == NULL) {
+        UIerr(UI_F_UI_DUP_USER_DATA, UI_R_USER_DATA_DUPLICATION_UNSUPPORTED);
+        return -1;
+    }
+
+    duplicate = ui->meth->ui_duplicate_data(ui, user_data);
+    if (duplicate == NULL) {
+        UIerr(UI_F_UI_DUP_USER_DATA, ERR_R_MALLOC_FAILURE);
+        return -1;
+    }
+
+    (void)UI_add_user_data(ui, duplicate);
+    ui->flags |= UI_FLAG_DUPL_DATA;
+
+    return 0;
+}
+
 void *UI_get0_user_data(UI *ui)
 {
     return ui->user_data;
@@ -403,6 +442,19 @@ const char *UI_get0_result(UI *ui, int i)
     return UI_get0_result_string(sk_UI_STRING_value(ui->strings, i));
 }
 
+int UI_get_result_length(UI *ui, int i)
+{
+    if (i < 0) {
+        UIerr(UI_F_UI_GET_RESULT_LENGTH, UI_R_INDEX_TOO_SMALL);
+        return -1;
+    }
+    if (i >= sk_UI_STRING_num(ui->strings)) {
+        UIerr(UI_F_UI_GET_RESULT_LENGTH, UI_R_INDEX_TOO_LARGE);
+        return -1;
+    }
+    return UI_get_result_string_length(sk_UI_STRING_value(ui->strings, i));
+}
+
 static int print_error(const char *str, size_t len, UI *ui)
 {
     UI_STRING uis;
@@ -411,7 +463,8 @@ static int print_error(const char *str, size_t len, UI *ui)
     uis.type = UIT_ERROR;
     uis.out_string = str;
 
-    if (ui->meth->ui_write_string && !ui->meth->ui_write_string(ui, &uis))
+    if (ui->meth->ui_write_string != NULL
+        && ui->meth->ui_write_string(ui, &uis) <= 0)
         return -1;
     return 0;
 }
@@ -419,30 +472,38 @@ static int print_error(const char *str, size_t len, UI *ui)
 int UI_process(UI *ui)
 {
     int i, ok = 0;
+    const char *state = "processing";
 
-    if (ui->meth->ui_open_session && !ui->meth->ui_open_session(ui))
-        return -1;
+    if (ui->meth->ui_open_session != NULL
+        && ui->meth->ui_open_session(ui) <= 0) {
+        state = "opening session";
+        ok = -1;
+        goto err;
+    }
 
     if (ui->flags & UI_FLAG_PRINT_ERRORS)
         ERR_print_errors_cb((int (*)(const char *, size_t, void *))
                             print_error, (void *)ui);
 
     for (i = 0; i < sk_UI_STRING_num(ui->strings); i++) {
-        if (ui->meth->ui_write_string
-            && !ui->meth->ui_write_string(ui,
-                                          sk_UI_STRING_value(ui->strings, i)))
+        if (ui->meth->ui_write_string != NULL
+            && (ui->meth->ui_write_string(ui,
+                                          sk_UI_STRING_value(ui->strings, i))
+                <= 0))
         {
+            state = "writing strings";
             ok = -1;
             goto err;
         }
     }
 
-    if (ui->meth->ui_flush)
+    if (ui->meth->ui_flush != NULL)
         switch (ui->meth->ui_flush(ui)) {
         case -1:               /* Interrupt/Cancel/something... */
             ok = -2;
             goto err;
         case 0:                /* Errors */
+            state = "flushing";
             ok = -1;
             goto err;
         default:               /* Success */
@@ -451,7 +512,7 @@ int UI_process(UI *ui)
         }
 
     for (i = 0; i < sk_UI_STRING_num(ui->strings); i++) {
-        if (ui->meth->ui_read_string) {
+        if (ui->meth->ui_read_string != NULL) {
             switch (ui->meth->ui_read_string(ui,
                                              sk_UI_STRING_value(ui->strings,
                                                                 i))) {
@@ -459,6 +520,7 @@ int UI_process(UI *ui)
                 ok = -2;
                 goto err;
             case 0:            /* Errors */
+                state = "reading strings";
                 ok = -1;
                 goto err;
             default:           /* Success */
@@ -467,9 +529,20 @@ int UI_process(UI *ui)
             }
         }
     }
+
+    state = NULL;
  err:
-    if (ui->meth->ui_close_session && !ui->meth->ui_close_session(ui))
-        return -1;
+    if (ui->meth->ui_close_session != NULL
+        && ui->meth->ui_close_session(ui) <= 0) {
+        if (state == NULL)
+            state = "closing session";
+        ok = -1;
+    }
+
+    if (ok == -1) {
+        UIerr(UI_F_UI_PROCESS, UI_R_PROCESSING_ERROR);
+        ERR_add_error_data(2, "while ", state);
+    }
     return ok;
 }
 
@@ -500,25 +573,12 @@ int UI_ctrl(UI *ui, int cmd, long i, void *p, void (*f) (void))
 
 int UI_set_ex_data(UI *r, int idx, void *arg)
 {
-    return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
+    return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
 }
 
 void *UI_get_ex_data(UI *r, int idx)
 {
-    return (CRYPTO_get_ex_data(&r->ex_data, idx));
-}
-
-void UI_set_default_method(const UI_METHOD *meth)
-{
-    default_UI_meth = meth;
-}
-
-const UI_METHOD *UI_get_default_method(void)
-{
-    if (default_UI_meth == NULL) {
-        default_UI_meth = UI_OpenSSL();
-    }
-    return default_UI_meth;
+    return CRYPTO_get_ex_data(&r->ex_data, idx);
 }
 
 const UI_METHOD *UI_get_method(UI *ui)
@@ -532,17 +592,19 @@ const UI_METHOD *UI_set_method(UI *ui, const UI_METHOD *meth)
     return ui->meth;
 }
 
-UI_METHOD *UI_create_method(char *name)
+UI_METHOD *UI_create_method(const char *name)
 {
-    UI_METHOD *ui_method = OPENSSL_zalloc(sizeof(*ui_method));
+    UI_METHOD *ui_method = NULL;
 
-    if (ui_method != NULL) {
-        ui_method->name = OPENSSL_strdup(name);
-        if (ui_method->name == NULL) {
-            OPENSSL_free(ui_method);
-            UIerr(UI_F_UI_CREATE_METHOD, ERR_R_MALLOC_FAILURE);
-            return NULL;
-        }
+    if ((ui_method = OPENSSL_zalloc(sizeof(*ui_method))) == NULL
+        || (ui_method->name = OPENSSL_strdup(name)) == NULL
+        || !CRYPTO_new_ex_data(CRYPTO_EX_INDEX_UI_METHOD, ui_method,
+                               &ui_method->ex_data)) {
+        if (ui_method)
+            OPENSSL_free(ui_method->name);
+        OPENSSL_free(ui_method);
+        UIerr(UI_F_UI_CREATE_METHOD, ERR_R_MALLOC_FAILURE);
+        return NULL;
     }
     return ui_method;
 }
@@ -554,6 +616,10 @@ UI_METHOD *UI_create_method(char *name)
  */
 void UI_destroy_method(UI_METHOD *ui_method)
 {
+    if (ui_method == NULL)
+        return;
+    CRYPTO_free_ex_data(CRYPTO_EX_INDEX_UI_METHOD, ui_method,
+                        &ui_method->ex_data);
     OPENSSL_free(ui_method->name);
     ui_method->name = NULL;
     OPENSSL_free(ui_method);
@@ -561,49 +627,61 @@ void UI_destroy_method(UI_METHOD *ui_method)
 
 int UI_method_set_opener(UI_METHOD *method, int (*opener) (UI *ui))
 {
-    if (method) {
+    if (method != NULL) {
         method->ui_open_session = opener;
         return 0;
-    } else
-        return -1;
+    }
+    return -1;
 }
 
 int UI_method_set_writer(UI_METHOD *method,
                          int (*writer) (UI *ui, UI_STRING *uis))
 {
-    if (method) {
+    if (method != NULL) {
         method->ui_write_string = writer;
         return 0;
-    } else
-        return -1;
+    }
+    return -1;
 }
 
 int UI_method_set_flusher(UI_METHOD *method, int (*flusher) (UI *ui))
 {
-    if (method) {
+    if (method != NULL) {
         method->ui_flush = flusher;
         return 0;
-    } else
-        return -1;
+    }
+    return -1;
 }
 
 int UI_method_set_reader(UI_METHOD *method,
                          int (*reader) (UI *ui, UI_STRING *uis))
 {
-    if (method) {
+    if (method != NULL) {
         method->ui_read_string = reader;
         return 0;
-    } else
-        return -1;
+    }
+    return -1;
 }
 
 int UI_method_set_closer(UI_METHOD *method, int (*closer) (UI *ui))
 {
-    if (method) {
+    if (method != NULL) {
         method->ui_close_session = closer;
         return 0;
-    } else
-        return -1;
+    }
+    return -1;
+}
+
+int UI_method_set_data_duplicator(UI_METHOD *method,
+                                  void *(*duplicator) (UI *ui, void *ui_data),
+                                  void (*destructor)(UI *ui, void *ui_data))
+{
+    if (method != NULL) {
+        method->ui_duplicate_data = duplicator;
+        method->ui_destroy_data = destructor;
+        return 0;
+    }
+    return -1;
 }
 
 int UI_method_set_prompt_constructor(UI_METHOD *method,
@@ -613,150 +691,201 @@ int UI_method_set_prompt_constructor(UI_METHOD *method,
                                                                   const char
                                                                   *object_name))
 {
-    if (method) {
+    if (method != NULL) {
         method->ui_construct_prompt = prompt_constructor;
         return 0;
-    } else
-        return -1;
+    }
+    return -1;
 }
 
-int (*UI_method_get_opener(UI_METHOD *method)) (UI *) {
-    if (method)
+int UI_method_set_ex_data(UI_METHOD *method, int idx, void *data)
+{
+    return CRYPTO_set_ex_data(&method->ex_data, idx, data);
+}
+
+int (*UI_method_get_opener(const UI_METHOD *method)) (UI *)
+{
+    if (method != NULL)
         return method->ui_open_session;
-    else
-        return NULL;
+    return NULL;
 }
 
-int (*UI_method_get_writer(UI_METHOD *method)) (UI *, UI_STRING *) {
-    if (method)
+int (*UI_method_get_writer(const UI_METHOD *method)) (UI *, UI_STRING *)
+{
+    if (method != NULL)
         return method->ui_write_string;
-    else
-        return NULL;
+    return NULL;
 }
 
-int (*UI_method_get_flusher(UI_METHOD *method)) (UI *) {
-    if (method)
+int (*UI_method_get_flusher(const UI_METHOD *method)) (UI *)
+{
+    if (method != NULL)
         return method->ui_flush;
-    else
-        return NULL;
+    return NULL;
 }
 
-int (*UI_method_get_reader(UI_METHOD *method)) (UI *, UI_STRING *) {
-    if (method)
+int (*UI_method_get_reader(const UI_METHOD *method)) (UI *, UI_STRING *)
+{
+    if (method != NULL)
         return method->ui_read_string;
-    else
-        return NULL;
+    return NULL;
 }
 
-int (*UI_method_get_closer(UI_METHOD *method)) (UI *) {
-    if (method)
+int (*UI_method_get_closer(const UI_METHOD *method)) (UI *)
+{
+    if (method != NULL)
         return method->ui_close_session;
-    else
-        return NULL;
+    return NULL;
 }
 
-char *(*UI_method_get_prompt_constructor(UI_METHOD *method)) (UI *,
-                                                              const char *,
-                                                              const char *) {
-    if (method)
+char *(*UI_method_get_prompt_constructor(const UI_METHOD *method))
+    (UI *, const char *, const char *)
+{
+    if (method != NULL)
         return method->ui_construct_prompt;
-    else
-        return NULL;
+    return NULL;
+}
+
+void *(*UI_method_get_data_duplicator(const UI_METHOD *method)) (UI *, void *)
+{
+    if (method != NULL)
+        return method->ui_duplicate_data;
+    return NULL;
+}
+
+void (*UI_method_get_data_destructor(const UI_METHOD *method)) (UI *, void *)
+{
+    if (method != NULL)
+        return method->ui_destroy_data;
+    return NULL;
+}
+
+const void *UI_method_get_ex_data(const UI_METHOD *method, int idx)
+{
+    return CRYPTO_get_ex_data(&method->ex_data, idx);
 }
 
 enum UI_string_types UI_get_string_type(UI_STRING *uis)
 {
-    if (!uis)
-        return UIT_NONE;
     return uis->type;
 }
 
 int UI_get_input_flags(UI_STRING *uis)
 {
-    if (!uis)
-        return 0;
     return uis->input_flags;
 }
 
 const char *UI_get0_output_string(UI_STRING *uis)
 {
-    if (!uis)
-        return NULL;
     return uis->out_string;
 }
 
 const char *UI_get0_action_string(UI_STRING *uis)
 {
-    if (!uis)
-        return NULL;
     switch (uis->type) {
-    case UIT_PROMPT:
     case UIT_BOOLEAN:
         return uis->_.boolean_data.action_desc;
-    default:
-        return NULL;
+    case UIT_PROMPT:
+    case UIT_NONE:
+    case UIT_VERIFY:
+    case UIT_INFO:
+    case UIT_ERROR:
+        break;
     }
+    return NULL;
 }
 
 const char *UI_get0_result_string(UI_STRING *uis)
 {
-    if (!uis)
-        return NULL;
     switch (uis->type) {
     case UIT_PROMPT:
     case UIT_VERIFY:
         return uis->result_buf;
-    default:
-        return NULL;
+    case UIT_NONE:
+    case UIT_BOOLEAN:
+    case UIT_INFO:
+    case UIT_ERROR:
+        break;
+    }
+    return NULL;
+}
+
+int UI_get_result_string_length(UI_STRING *uis)
+{
+    switch (uis->type) {
+    case UIT_PROMPT:
+    case UIT_VERIFY:
+        return uis->result_len;
+    case UIT_NONE:
+    case UIT_BOOLEAN:
+    case UIT_INFO:
+    case UIT_ERROR:
+        break;
     }
+    return -1;
 }
 
 const char *UI_get0_test_string(UI_STRING *uis)
 {
-    if (!uis)
-        return NULL;
     switch (uis->type) {
     case UIT_VERIFY:
         return uis->_.string_data.test_buf;
-    default:
-        return NULL;
+    case UIT_NONE:
+    case UIT_BOOLEAN:
+    case UIT_INFO:
+    case UIT_ERROR:
+    case UIT_PROMPT:
+        break;
     }
+    return NULL;
 }
 
 int UI_get_result_minsize(UI_STRING *uis)
 {
-    if (!uis)
-        return -1;
     switch (uis->type) {
     case UIT_PROMPT:
     case UIT_VERIFY:
         return uis->_.string_data.result_minsize;
-    default:
-        return -1;
+    case UIT_NONE:
+    case UIT_INFO:
+    case UIT_ERROR:
+    case UIT_BOOLEAN:
+        break;
     }
+    return -1;
 }
 
 int UI_get_result_maxsize(UI_STRING *uis)
 {
-    if (!uis)
-        return -1;
     switch (uis->type) {
     case UIT_PROMPT:
     case UIT_VERIFY:
         return uis->_.string_data.result_maxsize;
-    default:
-        return -1;
+    case UIT_NONE:
+    case UIT_INFO:
+    case UIT_ERROR:
+    case UIT_BOOLEAN:
+        break;
     }
+    return -1;
 }
 
 int UI_set_result(UI *ui, UI_STRING *uis, const char *result)
 {
-    int l = strlen(result);
+#if 0
+    /*
+     * This is placed here solely to preserve UI_F_UI_SET_RESULT
+     * To be removed for OpenSSL 1.2.0
+     */
+    UIerr(UI_F_UI_SET_RESULT, ERR_R_DISABLED);
+#endif
+    return UI_set_result_ex(ui, uis, result, strlen(result));
+}
 
+int UI_set_result_ex(UI *ui, UI_STRING *uis, const char *result, int len)
+{
     ui->flags &= ~UI_FLAG_REDOABLE;
 
-    if (!uis)
-        return -1;
     switch (uis->type) {
     case UIT_PROMPT:
     case UIT_VERIFY:
@@ -769,36 +898,38 @@ int UI_set_result(UI *ui, UI_STRING *uis, const char *result)
             BIO_snprintf(number2, sizeof(number2), "%d",
                          uis->_.string_data.result_maxsize);
 
-            if (l < uis->_.string_data.result_minsize) {
+            if (len < uis->_.string_data.result_minsize) {
                 ui->flags |= UI_FLAG_REDOABLE;
-                UIerr(UI_F_UI_SET_RESULT, UI_R_RESULT_TOO_SMALL);
+                UIerr(UI_F_UI_SET_RESULT_EX, UI_R_RESULT_TOO_SMALL);
                 ERR_add_error_data(5, "You must type in ",
                                    number1, " to ", number2, " characters");
                 return -1;
             }
-            if (l > uis->_.string_data.result_maxsize) {
+            if (len > uis->_.string_data.result_maxsize) {
                 ui->flags |= UI_FLAG_REDOABLE;
-                UIerr(UI_F_UI_SET_RESULT, UI_R_RESULT_TOO_LARGE);
+                UIerr(UI_F_UI_SET_RESULT_EX, UI_R_RESULT_TOO_LARGE);
                 ERR_add_error_data(5, "You must type in ",
                                    number1, " to ", number2, " characters");
                 return -1;
             }
         }
 
-        if (!uis->result_buf) {
-            UIerr(UI_F_UI_SET_RESULT, UI_R_NO_RESULT_BUFFER);
+        if (uis->result_buf == NULL) {
+            UIerr(UI_F_UI_SET_RESULT_EX, UI_R_NO_RESULT_BUFFER);
             return -1;
         }
 
-        OPENSSL_strlcpy(uis->result_buf, result,
-                    uis->_.string_data.result_maxsize + 1);
+        memcpy(uis->result_buf, result, len);
+        if (len <= uis->_.string_data.result_maxsize)
+            uis->result_buf[len] = '\0';
+        uis->result_len = len;
         break;
     case UIT_BOOLEAN:
         {
             const char *p;
 
-            if (!uis->result_buf) {
-                UIerr(UI_F_UI_SET_RESULT, UI_R_NO_RESULT_BUFFER);
+            if (uis->result_buf == NULL) {
+                UIerr(UI_F_UI_SET_RESULT_EX, UI_R_NO_RESULT_BUFFER);
                 return -1;
             }
 
@@ -814,7 +945,9 @@ int UI_set_result(UI *ui, UI_STRING *uis, const char *result)
                 }
             }
         }
-    default:
+    case UIT_NONE:
+    case UIT_INFO:
+    case UIT_ERROR:
         break;
     }
     return 0;