1 files changed, 6 insertions, 4 deletions

diff --git a/src/lib/libcrypto/ui/ui_lib.c b/src/lib/libcrypto/ui/ui_lib.c
index cce9075ac1..33c86d76ef 100644
--- a/src/lib/libcrypto/ui/ui_lib.c
+++ b/src/lib/libcrypto/ui/ui_lib.c
@@ -62,6 +62,7 @@
 #include <openssl/ui.h>
 #include <openssl/err.h>
 #include "ui_locl.h"
+#include "cryptlib.h"
 
 IMPLEMENT_STACK_OF(UI_STRING_ST)
 
@@ -144,7 +145,8 @@ static UI_STRING *general_allocate_prompt(UI *ui, const char *prompt,
                 {
                 UIerr(UI_F_GENERAL_ALLOCATE_PROMPT,ERR_R_PASSED_NULL_PARAMETER);
                 }
-        else if (result_buf == NULL)
+        else if ((type == UIT_PROMPT || type == UIT_VERIFY
+                         || type == UIT_BOOLEAN) && result_buf == NULL)
                 {
                 UIerr(UI_F_GENERAL_ALLOCATE_PROMPT,UI_R_NO_RESULT_BUFFER);
                 }
@@ -235,7 +237,7 @@ static int general_allocate_boolean(UI *ui,
         return ret;
         }
 
-/* Returns the index to the place in the stack or 0 for error.  Uses a
+/* Returns the index to the place in the stack or -1 for error.  Uses a
    direct reference to the prompt.  */
 int UI_add_input_string(UI *ui, const char *prompt, int flags,
         char *result_buf, int minsize, int maxsize)
@@ -831,8 +833,8 @@ int UI_set_result(UI *ui, UI_STRING *uis, const char *result)
         case UIT_PROMPT:
         case UIT_VERIFY:
                 {
-                char number1[20];
-                char number2[20];
+                char number1[DECIMAL_SIZE(uis->_.string_data.result_minsize)+1];
+                char number2[DECIMAL_SIZE(uis->_.string_data.result_maxsize)+1];
 
                 BIO_snprintf(number1, sizeof(number1), "%d",
                         uis->_.string_data.result_minsize);