kmdcodec.cpp

来自「将konqueror浏览器移植到ARM9 2410中」· C++ 代码 · 共 1,213 行 · 第 1/3 页

}

void KMD5::update( const QByteArray& in )
{
    update( reinterpret_cast<Q_UINT8 *>(in.data()), in.size() );
}

void KMD5::update( Q_UINT8 *in, int len )
{
    if ( len == -1 )
        len = qstrlen( reinterpret_cast<char *>(in) );

    Q_UINT32 in_index;
    Q_UINT32 buffer_index;
    Q_UINT32 buffer_space;
    Q_UINT32 in_length = static_cast<Q_UINT32>( len );

    if (m_finalized)
    {
        m_error = ERR_ALREADY_FINALIZED;
        return;
    }

    buffer_index = static_cast<Q_UINT32>((m_count[0] >> 3) & 0x3F);

    if (  (m_count[0] += (in_length << 3))<(in_length << 3) )
        m_count[1]++;

    m_count[1] += (in_length >> 29);
    buffer_space = 64 - buffer_index;

    if (in_length >= buffer_space)
    {
        memcpy (m_buffer + buffer_index, in, buffer_space);
        transform (m_buffer);

        for (in_index = buffer_space; in_index + 63 < in_length;
             in_index += 64)
            transform (in+in_index);

        buffer_index = 0;
    }
    else
        in_index=0;

    memcpy(m_buffer+buffer_index, in+in_index, in_length-in_index);
}

void KMD5::update( FILE *file, bool closeFile )
{
    Q_UINT8 buffer[1024];
    int len;

    while ((len=fread(buffer, 1, 1024, file)))
        update(buffer, len);

    // Check if we got to this point because
    // we reached EOF or an error.
    if ( !feof( file ) )
    {
        m_error = ERR_CANNOT_READ_FILE;
        return;
    }

    // Close the file iff the flag is set.
    if ( closeFile && fclose (file) )
        m_error = ERR_CANNOT_CLOSE_FILE;
}

void KMD5::finalize ()
{
    Q_UINT8 bits[8];
    Q_UINT32 index, padLen;
    static Q_UINT8 PADDING[64]=
    {
        0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
    };

    if (m_finalized)
    {
        m_error = ERR_ALREADY_FINALIZED;
        return;
    }

    //encode (bits, m_count, 8);
    memcpy( bits, m_count, 8 );

    // Pad out to 56 mod 64.
    index = static_cast<Q_UINT32>((m_count[0] >> 3) & 0x3f);
    padLen = (index < 56) ? (56 - index) : (120 - index);
    update (PADDING, padLen);

    // Append length (before padding)
    update (bits, 8);

    // Store state in digest
    //encode (m_digest, m_state, 16);
    memcpy( m_digest, m_state, 16 );

    // Fill sensitive information with zero's
    memset ( (void *)m_buffer, 0, sizeof(*m_buffer));

    m_finalized = true;
}

void KMD5::reset()
{
    init();
}

bool KMD5::verify( const char * msg_digest, DigestType type )
{
    if ( !m_finalized || !m_digest || m_error != ERR_NONE )
      return false;
    return isDigestMatch( msg_digest,  type );
}

bool KMD5::verify( FILE* f, const char * msg_digest, DigestType type )
{
    init();
    update( f );
    finalize();
    return isDigestMatch( msg_digest,  type );
}

bool KMD5::verify( const QCString& in, const char * msg_digest,
                   DigestType type )
{
    init();
    update( in );
    finalize();
    return isDigestMatch( msg_digest,  type );
}

bool KMD5::verify( const QString& in, const char * msg_digest,
                   DigestType type )
{
    init();
    update( in );
    finalize();
    return isDigestMatch( msg_digest,  type );
}

Q_UINT8* KMD5::rawDigest()
{
    Q_UINT8* s = new Q_UINT8[16];
    rawDigest( reinterpret_cast<char *>(s) );
    if ( m_error == ERR_NONE )
        return s;
    else
        return '\0';
}

void KMD5::rawDigest( HASH bin )
{
    if (!m_finalized)
    {
        m_error = ERR_NOT_YET_FINALIZED;
        return;
    }
    memcpy( bin, m_digest, 16 );
}

char * KMD5::hexDigest()
{
    char *s = new char[33];
    hexDigest( s );
    if ( m_error == ERR_NONE )
        return s;
    else
        return 0;
}

void KMD5::hexDigest( HASHHEX hex )
{
    if (!m_finalized)
    {
        m_error = ERR_NOT_YET_FINALIZED;
        return;
    }

    for (int i=0; i<16; i++)
        sprintf(hex+i*2, "%02x", m_digest[i]);
    hex[32]='\0';
}

void KMD5::init()
{
    m_finalized = false;
    m_error = ERR_NONE;

    m_count[0] = 0;
    m_count[1] = 0;

    m_state[0] = 0x67452301;
    m_state[1] = 0xefcdab89;
    m_state[2] = 0x98badcfe;
    m_state[3] = 0x10325476;

    memset ( static_cast<void *>(m_buffer), 0, sizeof(*m_buffer));
    memset ( static_cast<void *>(m_digest), 0, sizeof(*m_digest));
}

bool KMD5::isDigestMatch( const char * msg_digest, DigestType type )
{
    bool result = false;

    switch (type)
    {
        case HEX:
            if ( strcmp( hexDigest(), msg_digest ) == 0 )
                result = true;
            break;
        case BIN:
            if ( strcmp( reinterpret_cast<char *>(rawDigest()), msg_digest ) == 0 )
                result = true;
            break;
        default:
            break;
    }
    return result;
}

void KMD5::transform( Q_UINT8 block[64] )
{

    Q_UINT32 a = m_state[0], b = m_state[1], c = m_state[2], d = m_state[3], x[16];

    decode (x, block, 64);
    //memcpy( x, block, 64 );
    ASSERT(!m_finalized);  // not just a user error, since the method is private

    /* Round 1 */
    FF (a, b, c, d, x[ 0], KMD5_S11, 0xd76aa478); /* 1 */
    FF (d, a, b, c, x[ 1], KMD5_S12, 0xe8c7b756); /* 2 */
    FF (c, d, a, b, x[ 2], KMD5_S13, 0x242070db); /* 3 */
    FF (b, c, d, a, x[ 3], KMD5_S14, 0xc1bdceee); /* 4 */
    FF (a, b, c, d, x[ 4], KMD5_S11, 0xf57c0faf); /* 5 */
    FF (d, a, b, c, x[ 5], KMD5_S12, 0x4787c62a); /* 6 */
    FF (c, d, a, b, x[ 6], KMD5_S13, 0xa8304613); /* 7 */
    FF (b, c, d, a, x[ 7], KMD5_S14, 0xfd469501); /* 8 */
    FF (a, b, c, d, x[ 8], KMD5_S11, 0x698098d8); /* 9 */
    FF (d, a, b, c, x[ 9], KMD5_S12, 0x8b44f7af); /* 10 */
    FF (c, d, a, b, x[10], KMD5_S13, 0xffff5bb1); /* 11 */
    FF (b, c, d, a, x[11], KMD5_S14, 0x895cd7be); /* 12 */
    FF (a, b, c, d, x[12], KMD5_S11, 0x6b901122); /* 13 */
    FF (d, a, b, c, x[13], KMD5_S12, 0xfd987193); /* 14 */
    FF (c, d, a, b, x[14], KMD5_S13, 0xa679438e); /* 15 */
    FF (b, c, d, a, x[15], KMD5_S14, 0x49b40821); /* 16 */

    /* Round 2 */
    GG (a, b, c, d, x[ 1], KMD5_S21, 0xf61e2562); /* 17 */
    GG (d, a, b, c, x[ 6], KMD5_S22, 0xc040b340); /* 18 */
    GG (c, d, a, b, x[11], KMD5_S23, 0x265e5a51); /* 19 */
    GG (b, c, d, a, x[ 0], KMD5_S24, 0xe9b6c7aa); /* 20 */
    GG (a, b, c, d, x[ 5], KMD5_S21, 0xd62f105d); /* 21 */
    GG (d, a, b, c, x[10], KMD5_S22,  0x2441453); /* 22 */
    GG (c, d, a, b, x[15], KMD5_S23, 0xd8a1e681); /* 23 */
    GG (b, c, d, a, x[ 4], KMD5_S24, 0xe7d3fbc8); /* 24 */
    GG (a, b, c, d, x[ 9], KMD5_S21, 0x21e1cde6); /* 25 */
    GG (d, a, b, c, x[14], KMD5_S22, 0xc33707d6); /* 26 */
    GG (c, d, a, b, x[ 3], KMD5_S23, 0xf4d50d87); /* 27 */
    GG (b, c, d, a, x[ 8], KMD5_S24, 0x455a14ed); /* 28 */
    GG (a, b, c, d, x[13], KMD5_S21, 0xa9e3e905); /* 29 */
    GG (d, a, b, c, x[ 2], KMD5_S22, 0xfcefa3f8); /* 30 */
    GG (c, d, a, b, x[ 7], KMD5_S23, 0x676f02d9); /* 31 */
    GG (b, c, d, a, x[12], KMD5_S24, 0x8d2a4c8a); /* 32 */

    /* Round 3 */
    HH (a, b, c, d, x[ 5], KMD5_S31, 0xfffa3942); /* 33 */
    HH (d, a, b, c, x[ 8], KMD5_S32, 0x8771f681); /* 34 */
    HH (c, d, a, b, x[11], KMD5_S33, 0x6d9d6122); /* 35 */
    HH (b, c, d, a, x[14], KMD5_S34, 0xfde5380c); /* 36 */
    HH (a, b, c, d, x[ 1], KMD5_S31, 0xa4beea44); /* 37 */
    HH (d, a, b, c, x[ 4], KMD5_S32, 0x4bdecfa9); /* 38 */
    HH (c, d, a, b, x[ 7], KMD5_S33, 0xf6bb4b60); /* 39 */
    HH (b, c, d, a, x[10], KMD5_S34, 0xbebfbc70); /* 40 */
    HH (a, b, c, d, x[13], KMD5_S31, 0x289b7ec6); /* 41 */
    HH (d, a, b, c, x[ 0], KMD5_S32, 0xeaa127fa); /* 42 */
    HH (c, d, a, b, x[ 3], KMD5_S33, 0xd4ef3085); /* 43 */
    HH (b, c, d, a, x[ 6], KMD5_S34,  0x4881d05); /* 44 */
    HH (a, b, c, d, x[ 9], KMD5_S31, 0xd9d4d039); /* 45 */
    HH (d, a, b, c, x[12], KMD5_S32, 0xe6db99e5); /* 46 */
    HH (c, d, a, b, x[15], KMD5_S33, 0x1fa27cf8); /* 47 */
    HH (b, c, d, a, x[ 2], KMD5_S34, 0xc4ac5665); /* 48 */

    /* Round 4 */
    II (a, b, c, d, x[ 0], KMD5_S41, 0xf4292244); /* 49 */
    II (d, a, b, c, x[ 7], KMD5_S42, 0x432aff97); /* 50 */
    II (c, d, a, b, x[14], KMD5_S43, 0xab9423a7); /* 51 */
    II (b, c, d, a, x[ 5], KMD5_S44, 0xfc93a039); /* 52 */
    II (a, b, c, d, x[12], KMD5_S41, 0x655b59c3); /* 53 */
    II (d, a, b, c, x[ 3], KMD5_S42, 0x8f0ccc92); /* 54 */
    II (c, d, a, b, x[10], KMD5_S43, 0xffeff47d); /* 55 */
    II (b, c, d, a, x[ 1], KMD5_S44, 0x85845dd1); /* 56 */
    II (a, b, c, d, x[ 8], KMD5_S41, 0x6fa87e4f); /* 57 */
    II (d, a, b, c, x[15], KMD5_S42, 0xfe2ce6e0); /* 58 */
    II (c, d, a, b, x[ 6], KMD5_S43, 0xa3014314); /* 59 */
    II (b, c, d, a, x[13], KMD5_S44, 0x4e0811a1); /* 60 */
    II (a, b, c, d, x[ 4], KMD5_S41, 0xf7537e82); /* 61 */
    II (d, a, b, c, x[11], KMD5_S42, 0xbd3af235); /* 62 */
    II (c, d, a, b, x[ 2], KMD5_S43, 0x2ad7d2bb); /* 63 */
    II (b, c, d, a, x[ 9], KMD5_S44, 0xeb86d391); /* 64 */

    m_state[0] += a;
    m_state[1] += b;
    m_state[2] += c;
    m_state[3] += d;

    memset ( static_cast<void *>(x), 0, sizeof(x) );
}

inline Q_UINT32 KMD5::rotate_left (Q_UINT32 x, Q_UINT32 n)
{
    return (x << n) | (x >> (32-n))  ;
}

inline Q_UINT32 KMD5::F (Q_UINT32 x, Q_UINT32 y, Q_UINT32 z)
{
    return (x & y) | (~x & z);
}

inline Q_UINT32 KMD5::G (Q_UINT32 x, Q_UINT32 y, Q_UINT32 z)
{
    return (x & z) | (y & ~z);
}

inline Q_UINT32 KMD5::H (Q_UINT32 x, Q_UINT32 y, Q_UINT32 z)
{
    return x ^ y ^ z;
}

inline Q_UINT32 KMD5::I (Q_UINT32 x, Q_UINT32 y, Q_UINT32 z)
{
    return y ^ (x | ~z);
}

void KMD5::FF ( Q_UINT32& a, Q_UINT32 b, Q_UINT32 c, Q_UINT32 d,
                       Q_UINT32 x, Q_UINT32  s, Q_UINT32 ac )
{
    a += F(b, c, d) + x + ac;
    a = rotate_left (a, s) +b;
}

void KMD5::GG ( Q_UINT32& a, Q_UINT32 b, Q_UINT32 c, Q_UINT32 d,
                 Q_UINT32 x, Q_UINT32 s, Q_UINT32 ac)
{
    a += G(b, c, d) + x + ac;
    a = rotate_left (a, s) +b;
}

void KMD5::HH ( Q_UINT32& a, Q_UINT32 b, Q_UINT32 c, Q_UINT32 d,
                 Q_UINT32 x, Q_UINT32 s, Q_UINT32 ac )
{
    a += H(b, c, d) + x + ac;
    a = rotate_left (a, s) +b;
}

void KMD5::II ( Q_UINT32& a, Q_UINT32 b, Q_UINT32 c, Q_UINT32 d,
                 Q_UINT32 x, Q_UINT32 s, Q_UINT32 ac )
{
    a += I(b, c, d) + x + ac;
    a = rotate_left (a, s) +b;
}


void KMD5::encode ( Q_UINT8 *output, Q_UINT32 *in, Q_UINT32 len )
{
#if !defined(WORDS_BIGENDIAN)
    memcpy(output, in, len);

#else
    Q_UINT32 i, j;
    for (i = 0, j = 0; j < len; i++, j += 4)
    {
        output[j]   = static_cast<Q_UINT8>((in[i] & 0xff));
        output[j+1] = static_cast<Q_UINT8>(((in[i] >> 8) & 0xff));
        output[j+2] = static_cast<Q_UINT8>(((in[i] >> 16) & 0xff));
        output[j+3] = static_cast<Q_UINT8>(((in[i] >> 24) & 0xff));
    }
#endif
}

// Decodes in (Q_UINT8) into output (Q_UINT32). Assumes len is a
// multiple of 4.
void KMD5::decode (Q_UINT32 *output, Q_UINT8 *in, Q_UINT32 len)
{
#if !defined(WORDS_BIGENDIAN)
    memcpy(output, in, len);

#else
    Q_UINT32 i, j;
    for (i = 0, j = 0; j < len; i++, j += 4)
        output[i] = static_cast<Q_UINT32>(in[j]) |
                    (static_cast<Q_UINT32>(in[j+1]) << 8)  |
                    (static_cast<Q_UINT32>(in[j+2]) << 16) |
                    (static_cast<Q_UINT32>(in[j+3]) << 24);
#endif
}