Enable SCTP in libjingle.

third_party/usrsctp/overrides/usrsctplib/netinet/sctp_sha1.h

+/*-
+ * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
+ * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * a) Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * b) Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the distribution.
+ *
+ * c) Neither the name of Cisco Systems, Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef __FreeBSD__
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+#endif
+
+
+#ifndef __SCTP_SLA1_h__
+#define __SCTP_SLA1_h__
+
+#include <sys/types.h>
+
+struct sha1_context {

[Ryan Sleevi, 2013/06/05 00:00:31]

We really shouldn't be rolling in yet-another-SHA1 implementation.

It seems if you're going the overrides/ path (entirely reasonable), then we
should be treating sha1_context as entirely opaque, and under the hood treating
it as an NSS type whose allocation is handled in _Init() and deallocation
handled in _Final().

[Mallinath (Gone from Chromium), 2013/06/06 14:55:51]

Done.

+        unsigned int A;
+        unsigned int B;
+        unsigned int C;
+        unsigned int D;
+        unsigned int E;
+        unsigned int H0;
+        unsigned int H1;
+        unsigned int H2;
+        unsigned int H3;
+        unsigned int H4;
+        unsigned int words[80];
+        unsigned int TEMP;
+        /* block I am collecting to process */
+        char sha_block[64];
+        /* collected so far */
+        int how_many_in_block;
+        unsigned int running_total;
+};
+typedef struct sha1_context SHA1_CTX;
+
+#define F1(B,C,D) (((B & C) | ((~B) & D)))      /* 0  <= t <= 19 */
+#define F2(B,C,D) (B ^ C ^ D)   /* 20 <= t <= 39 */
+#define F3(B,C,D) ((B & C) | (B & D) | (C & D)) /* 40 <= t <= 59 */
+#define F4(B,C,D) (B ^ C ^ D)   /* 600 <= t <= 79 */
+
+/* circular shift */
+#define CSHIFT(A,B) ((B << A) | (B >> (32-A)))
+
+#define K1 0x5a827999           /* 0  <= t <= 19 */
+#define K2 0x6ed9eba1           /* 20 <= t <= 39 */
+#define K3 0x8f1bbcdc           /* 40 <= t <= 59 */
+#define K4 0xca62c1d6           /* 60 <= t <= 79 */
+
+#define H0INIT 0x67452301
+#define H1INIT 0xefcdab89
+#define H2INIT 0x98badcfe
+#define H3INIT 0x10325476
+#define H4INIT 0xc3d2e1f0
+
+
+#if (defined(__APPLE__) && defined(KERNEL))
+#ifndef _KERNEL
+#define _KERNEL
+#endif
+#endif
+
+#if defined(_KERNEL) || defined(__Userspace__)
+#define SHA1_Init SCTP_SHA1_Init
+#define SHA1_Update SCTP_SHA1_Update
+#define SHA1_Final SCTP_SHA1_Final
+void SCTP_SHA1_Init(struct sha1_context *);
+void SCTP_SHA1_Update(struct sha1_context *, const unsigned char *, int);
+void SCTP_SHA1_Final(unsigned char *, struct sha1_context *);
+
+#endif                          /* _KERNEL */
+#endif