Make the crc32 hash provider correctly chain multiple input buffers,

so that it returns the same result if you pass it one big buffer or
many small buffers containing the same data.  To do this, change the
contract of mit_crc32 so that the cksum parameter is in-out.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@23386 dc483132-0cff-0310-8789-dd5450dbe970

1 files changed, 3 insertions, 5 deletions

diff --git a/src/lib/crypto/openssl/hash_provider/hash_crc32.c b/src/lib/crypto/openssl/hash_provider/hash_crc32.c
index e748c98cf..58efffe4f 100644
--- a/src/lib/crypto/openssl/hash_provider/hash_crc32.c
+++ b/src/lib/crypto/openssl/hash_provider/hash_crc32.c
@@ -33,17 +33,15 @@ static krb5_error_code
 k5_crc32_hash(unsigned int icount, const krb5_data *input,
               krb5_data *output)
 {
-    unsigned long c, cn;
+    unsigned long c;
     unsigned int i;
 
     if (output->length != CRC32_CKSUM_LENGTH)
         return(KRB5_CRYPTO_INTERNAL);
 
     c = 0;
-    for (i=0; i<icount; i++) {
-        mit_crc32(input[i].data, input[i].length, &cn);
-        c ^= cn;
-    }
+    for (i=0; i<icount; i++)
+        mit_crc32(input[i].data, input[i].length, &c);
 
     store_32_le(c, output->data);
     return(0);