From 3c40c7f134b4e87baa43b0cacb435b6f96245e2f Mon Sep 17 00:00:00 2001
From: Zhanna Tsitkov <tsitkova@mit.edu>
Date: Mon, 3 Aug 2009 14:19:16 +0000
Subject: Crypto modularity proj: Separate files under crypto directory based
 on their functionality. Move  Kerberos specific files into krb subdir and MIT
 specific - into builtin subdir. Place all tests into crypto_tests subfolder.

bigredbutton: whitespace

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@22477 dc483132-0cff-0310-8789-dd5450dbe970
---
 src/lib/crypto/krb/make_checksum_iov.c | 82 ++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 src/lib/crypto/krb/make_checksum_iov.c

(limited to 'src/lib/crypto/krb/make_checksum_iov.c')

diff --git a/src/lib/crypto/krb/make_checksum_iov.c b/src/lib/crypto/krb/make_checksum_iov.c
new file mode 100644
index 0000000..3cf4af6
--- /dev/null
+++ b/src/lib/crypto/krb/make_checksum_iov.c
@@ -0,0 +1,82 @@
+/*
+ * lib/crypto/make_checksum_iov.c
+ *
+ * Copyright 2008 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.
+ */
+
+#include "k5-int.h"
+#include "cksumtypes.h"
+#include "aead.h"
+
+krb5_error_code KRB5_CALLCONV
+krb5_c_make_checksum_iov(krb5_context context,
+			 krb5_cksumtype cksumtype,
+			 const krb5_keyblock *key,
+			 krb5_keyusage usage,
+			 krb5_crypto_iov *data,
+			 size_t num_data)
+{
+    unsigned int i;
+    size_t cksumlen;
+    krb5_error_code ret;
+    krb5_data cksum_data;
+    krb5_crypto_iov *checksum;
+
+    for (i = 0; i < krb5_cksumtypes_length; i++) {
+	if (krb5_cksumtypes_list[i].ctype == cksumtype)
+	    break;
+    }
+
+    if (i == krb5_cksumtypes_length)
+	return(KRB5_BAD_ENCTYPE);
+
+    if (krb5_cksumtypes_list[i].keyhash != NULL)
+	cksum_data.length = krb5_cksumtypes_list[i].keyhash->hashsize;
+    else
+	cksum_data.length = krb5_cksumtypes_list[i].hash->hashsize;
+
+    if (krb5_cksumtypes_list[i].trunc_size != 0)
+	cksumlen = krb5_cksumtypes_list[i].trunc_size;
+    else
+	cksumlen = cksum_data.length;
+
+    checksum = krb5int_c_locate_iov(data, num_data, KRB5_CRYPTO_TYPE_CHECKSUM);
+    if (checksum == NULL || checksum->data.length < cksumlen)
+	return(KRB5_BAD_MSIZE);
+
+    cksum_data.data = malloc(cksum_data.length);
+    if (cksum_data.data == NULL)
+	return(ENOMEM);
+
+    ret = krb5int_c_make_checksum_iov(&krb5_cksumtypes_list[i],
+				      key, usage, data, num_data,
+				      &cksum_data);
+    if (ret == 0) {
+	memcpy(checksum->data.data, cksum_data.data, cksumlen);
+	checksum->data.length = cksumlen;
+    }
+
+    free(cksum_data.data);
+
+    return(ret);
+}
-- 
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