1 files changed, 96 insertions, 0 deletions
diff --git a/src/lib/crypto/krb/yarrow/ycipher.c b/src/lib/crypto/krb/yarrow/ycipher.c
new file mode 100644
index 0000000..2af4104
--- /dev/null
+++ b/src/lib/crypto/krb/yarrow/ycipher.c
@@ -0,0 +1,96 @@
+/*
+ * lib/crypto/yarrow/ycipher.c
+ *
+ * Copyright (C) 2001, 2007 by the Massachusetts Institute of Technology.
+ * 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 M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ * 
+ * 
+ *
+ *  Routines  to implement krb5 cipher operations.
+ */
+#include "k5-int.h"
+#include "yarrow.h"
+#include "ycipher.h"
+#include "enc_provider.h"
+#include "assert.h"
+
+int
+krb5int_yarrow_cipher_init
+(CIPHER_CTX *ctx,
+ unsigned const char * key)
+{
+  size_t keybytes, keylength;
+  const struct krb5_enc_provider *enc = &yarrow_enc_provider;
+  krb5_error_code ret;
+  krb5_data randombits;
+  keybytes = enc->keybytes;
+  keylength = enc->keylength;
+  assert (keybytes == CIPHER_KEY_SIZE);
+  if (ctx->key.contents) {
+    memset (ctx->key.contents, 0, ctx->key.length);
+    free (ctx->key.contents);
+  }
+  ctx->key.contents = (void *) malloc  (keylength);
+  ctx->key.length = keylength;
+  if (ctx->key.contents == NULL)
+    return (YARROW_NOMEM);
+  randombits.data = (char *) key;
+  randombits.length = keybytes;
+  ret = enc->make_key (&randombits, &ctx->key);
+  if (ret) {
+    memset (ctx->key.contents, 0, ctx->key.length);
+    free(ctx->key.contents);
+    ctx->key.contents = NULL;
+    return (YARROW_FAIL);
+  }
+  return (YARROW_OK);
+}
+
+int krb5int_yarrow_cipher_encrypt_block
+(CIPHER_CTX *ctx, const unsigned char *in,
+ unsigned char *out)
+{
+  krb5_error_code ret;
+  krb5_data ind, outd;
+  const struct krb5_enc_provider *enc = &yarrow_enc_provider;
+  ind.data = (char *) in;
+  ind.length = CIPHER_BLOCK_SIZE;
+  outd.data = (char *) out;
+  outd.length = CIPHER_BLOCK_SIZE;
+  ret = enc->encrypt (&ctx->key, 0, &ind, &outd);
+  if (ret)
+    return YARROW_FAIL;
+  return YARROW_OK;
+}
+
+void
+krb5int_yarrow_cipher_final
+(CIPHER_CTX *ctx)
+
+{
+ if (ctx->key.contents) {
+    memset (ctx->key.contents, 0, ctx->key.length);
+    free (ctx->key.contents);
+  }
+  ctx->key.contents = 0;
+  ctx->key.length = 0;
+}