Upgrade libsrtp from 2.0.0 to 2.3.0, with source code. 4.0.79

trunk/3rdparty/libsrtp-2-fit/crypto/include/sha1.h

@@ -0,0 +1,184 @@
+/*
+ * sha1.h
+ *
+ * interface to the Secure Hash Algorithm v.1 (SHA-1), specified in
+ * FIPS 180-1
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ */
+
+/*
+ *
+ * Copyright (c) 2001-2017, Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ *   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.
+ *
+ *   Neither the name of the 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 HOLDERS 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.
+ *
+ */
+
+#ifndef SHA1_H
+#define SHA1_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "err.h"
+#ifdef OPENSSL
+#include <openssl/evp.h>
+#include <stdint.h>
+#else
+#include "datatypes.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef OPENSSL
+
+/*
+ * srtp_sha1_init(&ctx) initializes the SHA1 context ctx
+ *
+ * srtp_sha1_update(&ctx, msg, len) hashes the len octets starting at msg
+ * into the SHA1 context
+ *
+ * srtp_sha1_final(&ctx, output) performs the final processing of the SHA1
+ * context and writes the result to the 20 octets at output
+ *
+ * Return values are ignored on the EVP functions since all three
+ * of these functions return void.
+ *
+ */
+
+/* OpenSSL 1.1.0 made EVP_MD_CTX an opaque structure, which must be allocated
+   using EVP_MD_CTX_new. But this function doesn't exist in OpenSSL 1.0.x. */
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || LIBRESSL_VERSION_NUMBER
+
+typedef EVP_MD_CTX srtp_sha1_ctx_t;
+
+static inline void srtp_sha1_init(srtp_sha1_ctx_t *ctx)
+{
+    EVP_MD_CTX_init(ctx);
+    EVP_DigestInit(ctx, EVP_sha1());
+}
+
+static inline void srtp_sha1_update(srtp_sha1_ctx_t *ctx,
+                                    const uint8_t *M,
+                                    int octets_in_msg)
+{
+    EVP_DigestUpdate(ctx, M, octets_in_msg);
+}
+
+static inline void srtp_sha1_final(srtp_sha1_ctx_t *ctx, uint32_t *output)
+{
+    unsigned int len = 0;
+
+    EVP_DigestFinal(ctx, (unsigned char *)output, &len);
+    EVP_MD_CTX_cleanup(ctx);
+}
+
+#else
+
+typedef EVP_MD_CTX *srtp_sha1_ctx_t;
+
+static inline void srtp_sha1_init(srtp_sha1_ctx_t *ctx)
+{
+    *ctx = EVP_MD_CTX_new();
+    EVP_DigestInit(*ctx, EVP_sha1());
+}
+
+static inline void srtp_sha1_update(srtp_sha1_ctx_t *ctx,
+                                    const uint8_t *M,
+                                    int octets_in_msg)
+{
+    EVP_DigestUpdate(*ctx, M, octets_in_msg);
+}
+
+static inline void srtp_sha1_final(srtp_sha1_ctx_t *ctx, uint32_t *output)
+{
+    unsigned int len = 0;
+
+    EVP_DigestFinal(*ctx, (unsigned char *)output, &len);
+    EVP_MD_CTX_free(*ctx);
+}
+#endif
+
+#else
+
+typedef struct {
+    uint32_t H[5];            /* state vector                    */
+    uint32_t M[16];           /* message buffer                  */
+    int octets_in_buffer;     /* octets of message in buffer     */
+    uint32_t num_bits_in_msg; /* total number of bits in message */
+} srtp_sha1_ctx_t;
+
+/*
+ * srtp_sha1_init(&ctx) initializes the SHA1 context ctx
+ *
+ * srtp_sha1_update(&ctx, msg, len) hashes the len octets starting at msg
+ * into the SHA1 context
+ *
+ * srtp_sha1_final(&ctx, output) performs the final processing of the SHA1
+ * context and writes the result to the 20 octets at output
+ *
+ */
+void srtp_sha1_init(srtp_sha1_ctx_t *ctx);
+
+void srtp_sha1_update(srtp_sha1_ctx_t *ctx,
+                      const uint8_t *M,
+                      int octets_in_msg);
+
+void srtp_sha1_final(srtp_sha1_ctx_t *ctx, uint32_t output[5]);
+
+/*
+ * The srtp_sha1_core function is INTERNAL to SHA-1, but it is declared
+ * here because it is also used by the cipher SEAL 3.0 in its key
+ * setup algorithm.
+ */
+
+/*
+ *  srtp_sha1_core(M, H) computes the core sha1 compression function, where M is
+ *  the next part of the message and H is the intermediate state {H0,
+ *  H1, ...}
+ *
+ *  this function does not do any of the padding required in the
+ *  complete sha1 function
+ */
+void srtp_sha1_core(const uint32_t M[16], uint32_t hash_value[5]);
+
+#endif /* else OPENSSL */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SHA1_H */