WebSocket: Add support for noTLS and TinyDTLS

Use SHA1 code from RFC3174 sections 7.1 and 7.2.

include/coap3/coap_internal.h

@@ -118,6 +118,7 @@ typedef struct oscore_ctx_t oscore_ctx_t;
 #include "coap_pdu_internal.h"
 #include "coap_resource_internal.h"
 #include "coap_session_internal.h"
+#include "coap_sha1_internal.h"
 #include "coap_subscribe_internal.h"
 #include "coap_tcp_internal.h"
 #include "coap_uri_internal.h"

include/coap3/coap_sha1_internal.h

@@ -0,0 +1,111 @@
+/*
+ *  coap_sha1_internal.h
+ *
+ *  Full Copyright Statement RFC3174
+ *
+ * =======================================================================
+ *
+ *  Copyright (C) The Internet Society (2001).  All Rights Reserved.
+ *
+ *  This document and translations of it may be copied and furnished to
+ *  others, and derivative works that comment on or otherwise explain it
+ *  or assist in its implementation may be prepared, copied, published
+ *  and distributed, in whole or in part, without restriction of any
+ *  kind, provided that the above copyright notice and this paragraph are
+ *  included on all such copies and derivative works.  However, this
+ *  document itself may not be modified in any way, such as by removing
+ *  the copyright notice or references to the Internet Society or other
+ *  Internet organizations, except as needed for the purpose of
+ *  developing Internet standards in which case the procedures for
+ *  copyrights defined in the Internet Standards process must be
+ *  followed, or as required to translate it into languages other than
+ *  English.
+ *
+ *  The limited permissions granted above are perpetual and will not be
+ *  revoked by the Internet Society or its successors or assigns.
+ *
+ *  This document and the information contained herein is provided on an
+ *  "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
+ *  TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
+ *  BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
+ *  HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * =======================================================================
+ *
+ *  Description:
+ *      This is the header file for code which implements the Secure
+ *      Hashing Algorithm 1 as defined in FIPS PUB 180-1 published
+ *      April 17, 1995.
+ *
+ *      Many of the variable names in this code, especially the
+ *      single character names, were used because those were the names
+ *      used in the publication.
+ *
+ *      Please read the file sha1.c for more information.
+ *
+ * Taken from https://datatracker.ietf.org/doc/html/rfc3174#section-7.1
+ * Reformatted as appropriate.
+ *
+ */
+
+#ifndef COAP_SHA1_INTERNAL_H_
+#define COAP_SHA1_INTERNAL_H_
+
+/**
+ * @file coap_sha1_internal.h
+ * @brief Provides SHA1 support for WebSockets
+ */
+
+#include <stdint.h>
+/*
+ * If you do not have the ISO standard stdint.h header file, then you
+ * must typdef the following:
+ *    name              meaning
+ *  uint32_t         unsigned 32 bit integer
+ *  uint8_t          unsigned 8 bit integer (i.e., unsigned char)
+ *  int_least16_t    integer of >= 16 bits
+ *
+ */
+
+#ifndef _SHA_enum_
+#define _SHA_enum_
+enum {
+  shaSuccess = 0,
+  shaNull,            /* Null pointer parameter */
+  shaInputTooLong,    /* input data too long */
+  shaStateError       /* called Input after Result */
+};
+#endif
+#define SHA1HashSize 20
+
+/*
+ *  This structure will hold context information for the SHA-1
+ *  hashing operation
+ */
+typedef struct SHA1Context {
+  uint32_t Intermediate_Hash[SHA1HashSize/4]; /* Message Digest  */
+
+  uint32_t Length_Low;            /* Message length in bits      */
+  uint32_t Length_High;           /* Message length in bits      */
+
+  /* Index into message block array   */
+  int_least16_t Message_Block_Index;
+  uint8_t Message_Block[64];      /* 512-bit message blocks      */
+
+  int Computed;               /* Is the digest computed?         */
+  int Corrupted;             /* Is the message digest corrupted? */
+} SHA1Context;
+
+/*
+ *  Function Prototypes
+ */
+
+int SHA1Reset(SHA1Context *);
+int SHA1Input(SHA1Context *,
+              const uint8_t *,
+              unsigned int);
+int SHA1Result(SHA1Context *,
+               uint8_t Message_Digest[SHA1HashSize]);
+
+#endif /* COAP_SHA1_INTERNAL_H_ */