/usr/include/wvstreams/wvdigest.h is in libwvstreams-dev 4.6.1-7.
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 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | /* -*- Mode: C++ -*-
* Worldvisions Tunnel Vision Software:
* Copyright (C) 1997-2002 Net Integration Technologies, Inc.
*
* MD5, SHA-1 and HMAC digest abstractions.
*/
#ifndef __WVDIGEST_H
#define __WVDIGEST_H
#include "wvencoder.h"
#include <stdint.h>
struct env_md_st;
struct env_md_ctx_st;
struct hmac_ctx_st;
/**
* Superclass for all message digests.
*
* All message digest encoders have the following semantics:
*
* - On encode() or flush(), data from the input buffer is
* consumed and a message digest function is applied to
* incrementally update the internal digest state.
* No output is ever generated.
* - On finish(), the message digest is finalized and its value
* is written to the output buffer. Afterwards, no new data
* can be processed unless reset() is called.
* - On reset(), the current digest state is discarded allowing
* a new stream of data to be processed.
*
*/
class WvDigest : public WvEncoder
{
public:
/** Returns the number of bytes in the message digest. */
virtual size_t digestsize() const = 0;
};
/**
* @internal
* Base class for all digests constructed using the OpenSSL EVP API.
*/
class WvEVPMDDigest : public WvDigest
{
friend class WvHMACDigest;
const env_md_st *evpmd;
env_md_ctx_st *evpctx;
bool active;
public:
virtual ~WvEVPMDDigest();
virtual size_t digestsize() const;
protected:
WvEVPMDDigest(const env_md_st *_evpmd);
virtual bool _encode(WvBuf &inbuf, WvBuf &outbuf,
bool flush); // consumes input
virtual bool _finish(WvBuf &outbuf); // outputs digest
virtual bool _reset(); // supported: resets digest value
const env_md_st *getevpmd()
{ return evpmd; }
private:
void cleanup();
};
/**
* MD5 Digest.
* Has a digest length of 128 bits.
*/
class WvMD5Digest : public WvEVPMDDigest
{
public:
/** Creates an MD5 digest encoder. */
WvMD5Digest();
virtual ~WvMD5Digest() { }
};
/**
* SHA-1 Digest.
* Has a digest length of 160 bits.
*/
class WvSHA1Digest : public WvEVPMDDigest
{
public:
/** Creates an SHA1 digest encoder. */
WvSHA1Digest();
virtual ~WvSHA1Digest() { }
};
/**
* HMAC Message Authentication Code.
* Has a digest length that equals that of its underlying
* message digest encoder.
*/
class WvHMACDigest : public WvDigest
{
WvEVPMDDigest *digest;
unsigned char *key;
size_t keysize;
hmac_ctx_st *hmacctx;
bool active;
public:
/**
* Creates an HMAC digest encoder.
*
* "digest" is the message digest encoder to use as a
* hash function
* "key" is the authentication key
* "keysize" is the key size in bytes
*/
WvHMACDigest(WvEVPMDDigest *_digest, const void *_key,
size_t _keysize);
virtual ~WvHMACDigest();
virtual size_t digestsize() const;
protected:
virtual bool _encode(WvBuf &inbuf, WvBuf &outbuf,
bool flush); // consumes input
virtual bool _finish(WvBuf &outbuf); // outputs digest
virtual bool _reset(); // supported: resets digest value
private:
void cleanup();
};
/**
* CRC32 checksum
* Digest length of 4 bytes.
*/
class WvCrc32Digest : public WvDigest
{
uint32_t crc;
public:
WvCrc32Digest();
virtual ~WvCrc32Digest() { }
virtual size_t digestsize() const;
virtual bool _encode(WvBuf &inbuf, WvBuf &outbuf,
bool flush); // consumes input
virtual bool _finish(WvBuf &outbuf); // outputs digest
virtual bool _reset(); // supported: resets digest value
};
/**
* Adler32 checksum
* Digest length of 4 bytes.
*/
class WvAdler32Digest : public WvDigest
{
uint32_t crc;
public:
WvAdler32Digest();
virtual ~WvAdler32Digest() { }
virtual size_t digestsize() const;
virtual bool _encode(WvBuf &inbuf, WvBuf &outbuf,
bool flush); // consumes input
virtual bool _finish(WvBuf &outbuf); // outputs digest
virtual bool _reset(); // supported: resets digest value
};
#endif // __WVDIGEST_H
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