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authorErwin Nindl <nine@wirdorange.org>2007-06-22 13:59:20 +0000
committerErwin Nindl <nine@wirdorange.org>2007-06-22 13:59:20 +0000
commit0275479cb56c7f562f3513fef66c83fc44d1d8c9 (patch)
treef6fbb703cebf62d18b05e2a5e7591ac08c5b6702 /srtp/crypto/include/sha1.h
parentsatp internet draft 00 final ietf version (diff)
added libsrtp to svn
Diffstat (limited to 'srtp/crypto/include/sha1.h')
-rw-r--r--srtp/crypto/include/sha1.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/srtp/crypto/include/sha1.h b/srtp/crypto/include/sha1.h
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+/*
+ * 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) 2001-2006, 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
+
+#include "err.h"
+#include "datatypes.h"
+
+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 */
+} sha1_ctx_t;
+
+/*
+ * sha1(&ctx, msg, len, output) hashes the len octets starting at msg
+ * into the SHA1 context, then writes the result to the 20 octets at
+ * output
+ *
+ */
+
+void
+sha1(const uint8_t *message, int octets_in_msg, uint32_t output[5]);
+
+/*
+ * sha1_init(&ctx) initializes the SHA1 context ctx
+ *
+ * sha1_update(&ctx, msg, len) hashes the len octets starting at msg
+ * into the SHA1 context
+ *
+ * sha1_final(&ctx, output) performs the final processing of the SHA1
+ * context and writes the result to the 20 octets at output
+ *
+ */
+
+void
+sha1_init(sha1_ctx_t *ctx);
+
+void
+sha1_update(sha1_ctx_t *ctx, const uint8_t *M, int octets_in_msg);
+
+void
+sha1_final(sha1_ctx_t *ctx, uint32_t output[5]);
+
+/*
+ * The 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.
+ */
+
+/*
+ * 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
+sha1_core(const uint32_t M[16], uint32_t hash_value[5]);
+
+#endif /* SHA1_H */