AnonPrimitive::ANON_RESULT AnonHashSha1::anonymize (void* buf, unsigned int len)
{
Sha1::SHA1_Init (&sha);
Sha1::SHA1_Update (&sha, (unsigned char*) buf, len);
Sha1::SHA1_Final ((unsigned char*) &digest, &sha);
unsigned int remaining = len;
unsigned int pos = 0;
while (remaining != 0) {
if (remaining >= SHA1_DIGLEN) {
memcpy((unsigned char*) buf + pos, digest, SHA1_DIGLEN);
remaining -= SHA1_DIGLEN;
pos += SHA1_DIGLEN;
} else {
memcpy((unsigned char*) buf + pos, digest, remaining);
remaining = 0;
pos += remaining;
}
} // while (remaining != 0)
return ANON_RESULT (len);
}
AnonPrimitive::ANON_RESULT AnonHashHmacSha1::anonymize (void* buf, unsigned int len)
{
HmacSha1::sha1_hmac ((uint8_t*)&digest, key, keylen, (uint8_t*)buf, len);
unsigned int remaining = len;
unsigned int pos = 0;
while (remaining != 0) {
if (remaining >= SHA1_DIGLEN) {
memcpy ((unsigned char*) buf + pos, digest, SHA1_DIGLEN);
remaining -= SHA1_DIGLEN;
pos += SHA1_DIGLEN;
} else {
memcpy ((unsigned char*) buf + pos, digest, remaining);
remaining = 0;
pos += remaining;
}
} // while (remaining != 0)
return ANON_RESULT (len);
}
AnonPrimitive::ANON_RESULT AnonShuffle::anonymize_chain ( void* buf, unsigned int len ) const
{
unsigned char* buf1 = reinterpret_cast<unsigned char*> ( buf );
std::random_shuffle ( buf1, buf1+len );
return ANON_RESULT ( len );
}
AnonPrimitive::ANON_RESULT AnonShuffle::anonymize_internal ( const void*const src_buff, void* dst_buff, unsigned int len ) const
{
memcpy ( dst_buff, src_buff, len );
unsigned char* buff = reinterpret_cast<unsigned char*> ( dst_buff );
std::random_shuffle ( buff, buff+len );
return ANON_RESULT ( len );
}
