Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / cinelerra / sha1.h

diff --git a/cinelerra-5.1/cinelerra/sha1.h b/cinelerra-5.1/cinelerra/sha1.h
new file mode 100644 (file)
index 0000000..b5885f0
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+++ b/cinelerra-5.1/cinelerra/sha1.h
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+/*
+*Copyright (C) 2011 Google 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 Google 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.
+ */
+
+// A straightforward SHA-1 implementation based on RFC 3174.
+// http://www.ietf.org/rfc/rfc3174.txt
+// The names of functions and variables (such as "a", "b", and "f")
+// follow notations in RFC 3174.
+
+#ifndef __SHA1_H__
+#define __SHA1_H__
+
+#include<stdio.h>
+#include<stdint.h>
+#include<stdlib.h>
+#include<unistd.h>
+#include<string.h>
+
+class SHA1 {
+       void finalize();
+       void processBlock();
+       void reset();
+
+       uint8_t m_buffer[64];
+       size_t m_cursor;
+       uint64_t m_totalBytes;
+       uint32_t m_hash[5];
+       static inline uint32_t f(int t, uint32_t b, uint32_t c, uint32_t d) {
+               if (t < 20) return (b & c) | ((~b) & d);
+               if (t < 40) return b ^ c ^ d;
+               if (t < 60) return (b & c) | (b & d) | (c & d);
+               return b ^ c ^ d;
+       }
+       static inline uint32_t k(int t) {
+               if (t < 20) return 0x5a827999;
+               if (t < 40) return 0x6ed9eba1;
+               if (t < 60) return 0x8f1bbcdc;
+               return 0xca62c1d6;
+       }
+       static inline uint32_t rotateLeft(int n, uint32_t x) {
+               return (x << n) | (x >> (32-n));
+       }
+public:
+       SHA1() { reset(); }
+       void addBytes(const uint8_t* input, size_t length);
+       void computeHash(uint8_t *digest);
+
+};
+
+#endif