1 files changed, 94 insertions, 0 deletions
diff --git a/src/lib/crypto/krb/encrypt.c b/src/lib/crypto/krb/encrypt.c
new file mode 100644
index 0000000000000..d9d575a4dd467
--- /dev/null
+++ b/src/lib/crypto/krb/encrypt.c
@@ -0,0 +1,94 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+ * 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 "crypto_int.h"
+
+krb5_error_code KRB5_CALLCONV
+krb5_k_encrypt(krb5_context context, krb5_key key,
+               krb5_keyusage usage, const krb5_data *cipher_state,
+               const krb5_data *input, krb5_enc_data *output)
+{
+    const struct krb5_keytypes *ktp;
+    krb5_crypto_iov iov[4];
+    krb5_error_code ret;
+    unsigned int header_len, padding_len, trailer_len, total_len;
+
+    ktp = find_enctype(key->keyblock.enctype);
+    if (ktp == NULL)
+        return KRB5_BAD_ENCTYPE;
+
+    output->magic = KV5M_ENC_DATA;
+    output->kvno = 0;
+    output->enctype = key->keyblock.enctype;
+
+    /* Get the lengths of the token parts and compute the total. */
+    header_len = ktp->crypto_length(ktp, KRB5_CRYPTO_TYPE_HEADER);
+    padding_len = krb5int_c_padding_length(ktp, input->length);
+    trailer_len = ktp->crypto_length(ktp, KRB5_CRYPTO_TYPE_TRAILER);
+    total_len = header_len + input->length + padding_len + trailer_len;
+    if (output->ciphertext.length < total_len)
+        return KRB5_BAD_MSIZE;
+
+    /* Set up the iov structures for the token parts. */
+    iov[0].flags = KRB5_CRYPTO_TYPE_HEADER;
+    iov[0].data = make_data(output->ciphertext.data, header_len);
+
+    iov[1].flags = KRB5_CRYPTO_TYPE_DATA;
+    iov[1].data = make_data(output->ciphertext.data + header_len,
+                            input->length);
+    if (input->length > 0)
+        memcpy(iov[1].data.data, input->data, input->length);
+
+    iov[2].flags = KRB5_CRYPTO_TYPE_PADDING;
+    iov[2].data = make_data(iov[1].data.data + input->length, padding_len);
+
+    iov[3].flags = KRB5_CRYPTO_TYPE_TRAILER;
+    iov[3].data = make_data(iov[2].data.data + padding_len, trailer_len);
+
+    ret = ktp->encrypt(ktp, key, usage, cipher_state, iov, 4);
+    if (ret != 0)
+        zap(iov[1].data.data, iov[1].data.length);
+    else
+        output->ciphertext.length = total_len;
+    return ret;
+}
+
+krb5_error_code KRB5_CALLCONV
+krb5_c_encrypt(krb5_context context, const krb5_keyblock *keyblock,
+               krb5_keyusage usage, const krb5_data *cipher_state,
+               const krb5_data *input, krb5_enc_data *output)
+{
+    krb5_key key;
+    krb5_error_code ret;
+
+    ret = krb5_k_create_key(context, keyblock, &key);
+    if (ret != 0)
+        return ret;
+    ret = krb5_k_encrypt(context, key, usage, cipher_state, input, output);
+    krb5_k_free_key(context, key);
+    return ret;
+}