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git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@1608 dc483132-0cff-0310-8789-dd5450dbe970

diff --git a/src/lib/crypto/md4/md4crypto.c b/src/lib/crypto/md4/md4crypto.c
new file mode 100644 (file)
index 0000000..e8ef135
--- /dev/null
+++ b/src/lib/crypto/md4/md4crypto.c
@@ -0,0 +1,87 @@
+/*
+ * $Source$
+ * $Author$
+ *
+ * Copyright 1991 by the Massachusetts Institute of Technology.
+ *
+ * For copying and distribution information, please see the file
+ * <krb5/copyright.h>.
+ *
+ * Kerberos glue for MD4 sample implementation.
+ */
+
+#if !defined(lint) && !defined(SABER)
+static char rcsid_md4crypto_c[] =
+"$Id$";
+#endif /* !lint & !SABER */
+
+#include <krb5/copyright.h>
+#include <krb5/krb5.h>
+#include <krb5/rsa-md4.h>
+
+#include "../des/des_int.h"    /* we cheat a bit and call it directly... */
+
+static krb5_error_code
+md4_crypto_sum_func(in, in_length, seed, seed_length, outcksum)
+krb5_pointer in;
+size_t in_length;
+krb5_pointer seed;
+size_t seed_length;
+krb5_checksum *outcksum;
+{
+    krb5_octet *output, outtmp[RSA_MD4_DES_CKSUM_LENGTH];
+    krb5_octet *input = (krb5_octet *)in;
+    krb5_encrypt_block eblock;
+    krb5_keyblock keyblock;
+    krb5_error_code retval;
+
+    register int i, j;
+    MDstruct working;
+
+    MDbegin(&working);
+
+    for (i = in_length; i >= 64; i -= 64, input += 64)
+       /* MD4 works in 512 bit chunks (64 bytes) */
+       MDupdate(&working, input, 512);
+    /* now close out remaining stuff.  Even if i == 0, we want to
+       "close out" the MD4 algorithm */
+    MDupdate(&working, input, i*8);
+
+    outcksum->checksum_type = CKSUMTYPE_RSA_MD4_DES;
+    outcksum->length = RSA_MD4_DES_CKSUM_LENGTH;
+
+    /* the output code here is adapted from MDprint;
+       it needs to assemble it into proper byte order. */
+
+    output = &outtmp[0];
+    for (i = 0; i < 4; i++)
+       for (j = 0; j < 32; j += 8)
+           *output++ = (working.buffer[i] >> j) & 0xFF;
+
+    keyblock.length = seed_length;
+    keyblock.contents = seed;
+    keyblock.keytype = KEYTYPE_DES;
+
+    if (retval = mit_des_process_key(&eblock, &keyblock))
+       return retval;
+    /* now encrypt it */
+    retval = mit_des_cbc_encrypt(output,
+                                outcksum->contents,
+                                RSA_MD4_DES_CKSUM_LENGTH,
+                                (struct mit_des_ks_struct *)eblock.priv,
+                                keyblock.contents,
+                                MIT_DES_ENCRYPT);
+    if (retval) {
+       (void) mit_des_finish_key(&eblock);
+       return retval;
+    }
+    return mit_des_finish_key(&eblock);
+}
+
+
+krb5_checksum_entry md4_crypto_cksumtable_entry = {
+    md4_crypto_sum_func,
+    RSA_MD4_CKSUM_LENGTH, /* CRC-32 is 4 octets */
+    1,                                 /* is collision proof */
+    1,                                 /* uses key */
+};