krb5 commit: Remove tautological comparisons

https://github.com/krb5/krb5/commit/1a8b805fc18c9b3865d472e765e19420d60348b6
commit 1a8b805fc18c9b3865d472e765e19420d60348b6
Author: Robbie Harwood <[email protected]>
Date:   Thu Feb 16 17:20:38 2017 -0500

    Remove tautological comparisons

 src/kadmin/server/schpw.c            |    2 +-
 src/lib/crypto/builtin/des/destest.c |    3 ++-
 src/lib/kdb/kdb_convert.c            |    4 ++--
 src/util/support/threads.c           |    6 ------
 4 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/src/kadmin/server/schpw.c b/src/kadmin/server/schpw.c
index 900adf7..2823057 100644
--- a/src/kadmin/server/schpw.c
+++ b/src/kadmin/server/schpw.c
@@ -366,7 +366,7 @@ chpwfail:
            to mk_error do. */
         krberror.error = ret;
         krberror.error -= ERROR_TABLE_BASE_krb5;
-        if (krberror.error < 0 || krberror.error > KRB_ERR_MAX)
+        if (krberror.error > KRB_ERR_MAX)
             krberror.error = KRB_ERR_GENERIC;
 
         krberror.client = NULL;
diff --git a/src/lib/crypto/builtin/des/destest.c b/src/lib/crypto/builtin/des/destest.c
index 6eeb070..dd2f68e 100644
--- a/src/lib/crypto/builtin/des/destest.c
+++ b/src/lib/crypto/builtin/des/destest.c
@@ -52,6 +52,7 @@
 /* Test a DES implementation against known inputs & outputs. */
 
 #include "des_int.h"
+#include <ctype.h>
 #include <stdio.h>
 
 void convert (char *, unsigned char []);
@@ -160,7 +161,7 @@ convert(text, cblock)
 {
     register int i;
     for (i = 0; i < 8; i++) {
-        if (text[i*2] < 0 || text[i*2] >= 128)
+        if (!isascii((unsigned char)text[i * 2]))
             abort ();
         if (value[(int) text[i*2]] == -1 || value[(int) text[i*2+1]] == -1) {
             printf("Bad value byte %d in %s\n", i, text);
diff --git a/src/lib/kdb/kdb_convert.c b/src/lib/kdb/kdb_convert.c
index 8172e9d..691635e 100644
--- a/src/lib/kdb/kdb_convert.c
+++ b/src/lib/kdb/kdb_convert.c
@@ -228,7 +228,7 @@ conv_princ_2ulog(krb5_principal princ, kdb_incr_update_t *upd,
 static void
 set_from_utf8str(krb5_data *d, utf8str_t u)
 {
-    if (u.utf8str_t_len > INT_MAX-1 || u.utf8str_t_len >= SIZE_MAX-1) {
+    if (u.utf8str_t_len > INT_MAX - 1) {
         d->data = NULL;
         return;
     }
@@ -419,7 +419,7 @@ ulog_conv_2logentry(krb5_context context, krb5_db_entry *entry,
             break;
 
         case AT_FAIL_AUTH_COUNT:
-            if (!exclude_nra && entry->fail_auth_count >= (krb5_kvno)0) {
+            if (!exclude_nra) {
                 ULOG_ENTRY_TYPE(update, ++final).av_type =
                     AT_FAIL_AUTH_COUNT;
                 ULOG_ENTRY(update, final).av_fail_auth_count =
diff --git a/src/util/support/threads.c b/src/util/support/threads.c
index bb8e287..be7e4c2 100644
--- a/src/util/support/threads.c
+++ b/src/util/support/threads.c
@@ -237,7 +237,6 @@ void *k5_getspecific (k5_key_t keynum)
     if (err)
         return NULL;
 
-    assert(keynum >= 0 && keynum < K5_KEY_MAX);
     assert(destructors_set[keynum] == 1);
 
 #ifndef ENABLE_THREADS
@@ -271,7 +270,6 @@ int k5_setspecific (k5_key_t keynum, void *value)
     if (err)
         return err;
 
-    assert(keynum >= 0 && keynum < K5_KEY_MAX);
     assert(destructors_set[keynum] == 1);
 
 #ifndef ENABLE_THREADS
@@ -334,8 +332,6 @@ int k5_key_register (k5_key_t keynum, void (*destructor)(void *))
     if (err)
         return err;
 
-    assert(keynum >= 0 && keynum < K5_KEY_MAX);
-
 #ifndef ENABLE_THREADS
 
     assert(destructors_set[keynum] == 0);
@@ -365,8 +361,6 @@ int k5_key_register (k5_key_t keynum, void (*destructor)(void *))
 
 int k5_key_delete (k5_key_t keynum)
 {
-    assert(keynum >= 0 && keynum < K5_KEY_MAX);
-
 #ifndef ENABLE_THREADS
 
     assert(destructors_set[keynum] == 1);