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From f3ba6614adc715b658fa7ba8de380c5890665de5 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
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Date: Wed, 5 Jun 2013 09:08:42 +0200
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Subject: [PATCH] crypt(3) can return NULL
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crypt(3) can fail and return NULL since glibc-2.17. This patch
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prevents from crashing CVS in that case.
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Patch ported from upstream report
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<https://savannah.nongnu.org/bugs/index.php?39040> developed by
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<mancha1@hush.com>.
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---
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src/server.c | 14 +++++++++-----
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1 file changed, 9 insertions(+), 5 deletions(-)
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diff --git a/src/server.c b/src/server.c
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index bc6f0d0..348338c 100644
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--- a/src/server.c
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+++ b/src/server.c
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@@ -5647,9 +5647,11 @@ check_repository_password (username, password, repository, host_user_ptr)
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host_user_tmp = username;
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/* Verify blank passwords directly, otherwise use crypt(). */
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+ char *crypt_passwd = found_password ? crypt (password, found_password): NULL;
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if ((found_password == NULL)
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- || ((strcmp (found_password, crypt (password, found_password))
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- == 0)))
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+ || (crypt_passwd != NULL
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+ && (strcmp (found_password, crypt_passwd)
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+ == 0)))
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{
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/* Give host_user_ptr permanent storage. */
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*host_user_ptr = xstrdup (host_user_tmp);
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@@ -5660,7 +5662,7 @@ check_repository_password (username, password, repository, host_user_ptr)
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#ifdef LOG_AUTHPRIV
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syslog (LOG_AUTHPRIV | LOG_NOTICE,
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"password mismatch for %s in %s: %s vs. %s", username,
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- repository, crypt(password, found_password), found_password);
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+ repository, crypt_passwd, found_password);
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#endif
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*host_user_ptr = NULL;
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retval = 2;
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@@ -5869,7 +5871,9 @@ error %s getnameinfo failed\n", strerror (errno));
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pamh = NULL;
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}
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#else
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- if (strcmp (found_passwd, crypt (password, found_passwd)) == 0)
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+ char *crypt_passwd = crypt (password, found_passwd);
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+ if ((crypt_passwd != NULL) &&
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+ (strcmp (found_passwd, crypt_passwd) == 0))
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{
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host_user = xstrdup (username);
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}
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@@ -5879,7 +5883,7 @@ error %s getnameinfo failed\n", strerror (errno));
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#ifdef LOG_AUTHPRIV
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syslog (LOG_AUTHPRIV | LOG_NOTICE,
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"password mismatch for %s: %s vs. %s", username,
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- crypt(password, found_passwd), found_passwd);
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+ crypt_passwd, found_passwd);
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#endif
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}
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#endif
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--
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1.8.1.4
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