crc.c: ensure the cksum length is sufficient

crc-test.c: set the cksum length field

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@8022 dc483132-0cff-0310-8789-dd5450dbe970

1 files changed, 7 insertions, 4 deletions

diff --git a/src/lib/crypto/crc32/crc.c b/src/lib/crypto/crc32/crc.c
index 48564b50c..9f055200a 100644
--- a/src/lib/crypto/crc32/crc.c
+++ b/src/lib/crypto/crc32/crc.c
@@ -145,15 +145,15 @@ static u_long const crc_table[256] = {
 
 /* Windows needs to these prototypes for crc32_cksumtable_entry below */
 
-krb5_error_code
+static krb5_error_code
 crc32_sum_func PROTOTYPE((krb5_pointer in, size_t in_length,
     krb5_pointer seed, size_t seed_length, krb5_checksum *outcksum));
 
-krb5_error_code
+static krb5_error_code
 crc32_verify_func PROTOTYPE((krb5_checksum FAR *cksum, krb5_pointer in,
 	size_t in_length, krb5_pointer seed, size_t seed_length));
 
-krb5_error_code
+static krb5_error_code
 crc32_sum_func(in, in_length, seed, seed_length, outcksum)
 krb5_pointer in;
 size_t in_length;
@@ -166,6 +166,9 @@ krb5_checksum FAR *outcksum;
     register int idx;
     size_t i;
 
+    if (outcksum->length < CRC32_CKSUM_LENGTH)
+	return KRB5_BAD_MSIZE;
+    
     data = (u_char *)in;
     for (i = 0; i < in_length; i++) {
 	idx = (int) (data[i] ^ c);
@@ -183,7 +186,7 @@ krb5_checksum FAR *outcksum;
     return 0;
 }
 
-krb5_error_code
+static krb5_error_code
 crc32_verify_func(cksum, in, in_length, seed, seed_length)
 krb5_checksum FAR *cksum;
 krb5_pointer in;