1 files changed, 85 insertions, 0 deletions
diff --git a/security/nss/lib/ssl/ssl3encode.c b/security/nss/lib/ssl/ssl3encode.c
new file mode 100644
index 000000000..960208a0f
--- /dev/null
+++ b/security/nss/lib/ssl/ssl3encode.c
@@ -0,0 +1,85 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is PRIVATE to SSL.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "prnetdb.h"
+#include "seccomon.h"
+#include "secerr.h"
+#include "ssl3encode.h"
+
+SECStatus
+ssl3_AppendToItem(SECItem *item, const unsigned char *buf, PRUint32 bytes)
+{
+    if (bytes > item->len) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return SECFailure;
+    }
+
+    PORT_Memcpy(item->data, buf, bytes);
+    item->data += bytes;
+    item->len -= bytes;
+    return SECSuccess;
+}
+
+SECStatus
+ssl3_AppendNumberToItem(SECItem *item, PRUint32 num, PRInt32 lenSize)
+{
+    SECStatus rv;
+    PRUint8 b[4];
+
+    ssl_EncodeUintX(num, lenSize, b);
+    rv = ssl3_AppendToItem(item, &b[0], lenSize);
+    return rv;
+}
+
+SECStatus
+ssl3_ConsumeFromItem(SECItem *item, unsigned char **buf, PRUint32 bytes)
+{
+    if (bytes > item->len) {
+        PORT_SetError(SEC_ERROR_BAD_DATA);
+        return SECFailure;
+    }
+
+    *buf = item->data;
+    item->data += bytes;
+    item->len -= bytes;
+    return SECSuccess;
+}
+
+SECStatus
+ssl3_ConsumeNumberFromItem(SECItem *item, PRUint32 *num, PRUint32 bytes)
+{
+    int i;
+
+    if (bytes > item->len || bytes > sizeof(*num)) {
+        PORT_SetError(SEC_ERROR_BAD_DATA);
+        return SECFailure;
+    }
+
+    *num = 0;
+    for (i = 0; i < bytes; i++) {
+        *num = (*num << 8) + item->data[i];
+    }
+
+    item->data += bytes;
+    item->len -= bytes;
+
+    return SECSuccess;
+}
+
+/* Helper function to encode an unsigned integer into a buffer. */
+PRUint8 *
+ssl_EncodeUintX(PRUint64 value, unsigned int bytes, PRUint8 *to)
+{
+    PRUint64 encoded;
+
+    PORT_Assert(bytes > 0 && bytes <= sizeof(encoded));
+
+    encoded = PR_htonll(value);
+    memcpy(to, ((unsigned char *)(&encoded)) + (sizeof(encoded) - bytes), bytes);
+    return to + bytes;
+}