From: Nick Mathewson <nickm@torproject.org>
Date: Thu, 24 May 2018 19:23:15 +0000 (-0400)
Subject: Improve the example getpass() implementation to show an error return
X-Git-Tag: OpenSSL_1_1_0i~73
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=50d06d1c7d2682b0042e921a76beb509d7ea68e1;p=oweals%2Fopenssl.git

Improve the example getpass() implementation to show an error return

Also, modernize the code, so that it isn't trying to store a size_t
into an int, and then check the int's sign. :/

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6271)

(cherry picked from commit c8c250333cd254ab3f4d709ebc5ed86a7c065721)
---

diff --git a/doc/crypto/PEM_read_bio_PrivateKey.pod b/doc/crypto/PEM_read_bio_PrivateKey.pod
index 43c48b560d..f8d1d1a80f 100644
--- a/doc/crypto/PEM_read_bio_PrivateKey.pod
+++ b/doc/crypto/PEM_read_bio_PrivateKey.pod
@@ -348,17 +348,16 @@ Skeleton pass phrase callback:
 
  int pass_cb(char *buf, int size, int rwflag, void *u)
  {
-     int len;
-     char *tmp;
 
      /* We'd probably do something else if 'rwflag' is 1 */
      printf("Enter pass phrase for \"%s\"\n", (char *)u);
 
      /* get pass phrase, length 'len' into 'tmp' */
-     tmp = "hello";
-     len = strlen(tmp);
-     if (len <= 0)
-         return 0;
+     char *tmp = "hello";
+     if (tmp == NULL) /* An error occurred */
+         return -1;
+
+     size_t len = strlen(tmp);
 
      if (len > size)
          len = size;