/usr/include/botan-2/botan/sha160.h is in libbotan-2-dev 2.4.0-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | /*
* SHA-160
* (C) 1999-2007,2016 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_SHA_160_H_
#define BOTAN_SHA_160_H_
#include <botan/mdx_hash.h>
namespace Botan {
/**
* NIST's SHA-160
*/
class BOTAN_PUBLIC_API(2,0) SHA_160 final : public MDx_HashFunction
   {
   public:
      std::string name() const override { return "SHA-160"; }
      size_t output_length() const override { return 20; }
      HashFunction* clone() const override { return new SHA_160; }
      std::unique_ptr<HashFunction> copy_state() const override;
      void clear() override;
      SHA_160() : MDx_HashFunction(64, true, true), m_digest(5)
         {
         clear();
         }
   private:
      void compress_n(const uint8_t[], size_t blocks) override;
#if defined(BOTAN_HAS_SHA1_ARMV8)
      static void sha1_armv8_compress_n(secure_vector<uint32_t>& digest,
                                        const uint8_t blocks[],
                                        size_t block_count);
#endif
#if defined(BOTAN_HAS_SHA1_SSE2)
      static void sse2_compress_n(secure_vector<uint32_t>& digest,
                                  const uint8_t blocks[],
                                  size_t block_count);
#endif
#if defined(BOTAN_HAS_SHA1_X86_SHA_NI)
      // Using x86 SHA instructions in Intel Goldmont and Cannonlake
      static void sha1_compress_x86(secure_vector<uint32_t>& digest,
                                    const uint8_t blocks[],
                                    size_t block_count);
#endif
      void copy_out(uint8_t[]) override;
      /**
      * The digest value
      */
      secure_vector<uint32_t> m_digest;
      /**
      * The message buffer
      */
      secure_vector<uint32_t> m_W;
   };
typedef SHA_160 SHA_1;
}
#endif
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