1 files changed, 110 insertions, 0 deletions
diff --git a/src/lib/crypto/krb/old/old_encrypt.c b/src/lib/crypto/krb/old/old_encrypt.c
new file mode 100644
index 0000000..98bd109
--- /dev/null
+++ b/src/lib/crypto/krb/old/old_encrypt.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 1998 by the FundsXpress, INC.
+ * 
+ * All rights reserved.
+ * 
+ * Export of this software from the United States of America may require
+ * a specific license from the United States Government.  It is the
+ * responsibility of any person or organization contemplating export to
+ * obtain such a license before exporting.
+ * 
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of FundsXpress. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  FundsXpress makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ * 
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "k5-int.h"
+#include "old.h"
+
+void
+krb5_old_encrypt_length(const struct krb5_enc_provider *enc,
+			const struct krb5_hash_provider *hash,
+			size_t inputlen,
+			size_t *length)
+{
+    size_t blocksize, hashsize;
+
+    blocksize = enc->block_size;
+    hashsize = hash->hashsize;
+
+    *length = krb5_roundup(blocksize+hashsize+inputlen, blocksize);
+}
+
+krb5_error_code
+krb5_old_encrypt(const struct krb5_enc_provider *enc,
+		 const struct krb5_hash_provider *hash,
+		 const krb5_keyblock *key,
+		 krb5_keyusage usage,
+		 const krb5_data *ivec,
+		 const krb5_data *input,
+		 krb5_data *output)
+{
+    krb5_error_code ret;
+    size_t blocksize, hashsize, enclen;
+    krb5_data datain, crcivec;
+    int real_ivec;
+
+    blocksize = enc->block_size;
+    hashsize = hash->hashsize;
+
+    krb5_old_encrypt_length(enc, hash, input->length, &enclen);
+
+    if (output->length < enclen)
+	return(KRB5_BAD_MSIZE);
+
+    output->length = enclen;
+
+    /* fill in confounded, padded, plaintext buffer with zero checksum */
+
+    memset(output->data, 0, output->length);
+
+    datain.length = blocksize;
+    datain.data = output->data;
+
+    if ((ret = krb5_c_random_make_octets(/* XXX */ 0, &datain)))
+	return(ret);
+    memcpy(output->data+blocksize+hashsize, input->data, input->length);
+
+    /* compute the checksum */
+
+    datain.length = hashsize;
+    datain.data = output->data+blocksize;
+
+    if ((ret = ((*(hash->hash))(1, output, &datain))))
+	goto cleanup;
+
+    /* encrypt it */
+
+    /* XXX this is gross, but I don't have much choice */
+    if ((key->enctype == ENCTYPE_DES_CBC_CRC) && (ivec == 0)) {
+	crcivec.length = key->length;
+	crcivec.data = (char *) key->contents;
+	ivec = &crcivec;
+	real_ivec = 0;
+    } else
+	real_ivec = 1;
+
+    if ((ret = ((*(enc->encrypt))(key, ivec, output, output))))
+	goto cleanup;
+
+    /* update ivec */
+    if (real_ivec && ivec != NULL && ivec->length == blocksize)
+	memcpy(ivec->data, output->data + output->length - blocksize,
+	       blocksize);
+cleanup:
+    if (ret)
+	memset(output->data, 0, output->length);
+
+    return(ret);
+}