cipher.cpp

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#include "cipher.h"
 
 
void  setkey_byBase64(Buffer key)
{
    Buffer tmpkey, deskey; 
 
    tmpkey = decode_base64_Buffer(key);
    deskey = to_bin64(tmpkey); 
 
    setkey((const char*)deskey.buf);
    free_Buffer(&tmpkey);
    free_Buffer(&deskey);
    return;
}
 
 
void  setkey_byBuffer(Buffer key)
{
    Buffer deskey; 
 
    deskey = to_bin64(key); 
    setkey((const char*)deskey.buf);
    free_Buffer(&deskey);
 
    return;
}
 
 
Buffer  encrypt_Buffer(Buffer buf, int mode)
{
    Buffer  str, cry;
 
    str = to_bin64(buf);
    encrypt((char*)str.buf, mode);
    cry = from_bin64(str);
    free_Buffer(&str);
    return  cry;
}
 
 
Buffer  encrypt_Base64(Buffer buf, int mode)
{
    Buffer dec, str, enc;
 
    dec = decode_base64_Buffer(buf);
    str = encrypt_Buffer(dec, mode);
    free_Buffer(&dec);
 
    enc = encode_base64_Buffer(str);
    free_Buffer(&str);
    return enc;
}
 
 
Buffer  to_bin64(Buffer str)
{
    int    i, mi;
    Buffer ret;
 
    ret = make_Buffer(64);
    if (ret.buf==NULL) return ret;
 
    mi = Min(64, str.vldsz*8);
    for (i=0; i<mi; i++) ret.buf[i] = (uByte)getBit(str.buf, i);
    ret.vldsz = mi;
    return ret;
}
 
 
Buffer  from_bin64(Buffer str)
{
    int    i;
    Buffer ret;
    
    ret = init_Buffer();
    if (str.vldsz!=64) return ret;
 
    ret = make_Buffer(8);
    if (ret.buf==NULL) return ret;
 
    for (i=0; i<64; i++) setBit(ret.buf, i, (int)str.buf[i]);
    ret.vldsz = 8;
    return  ret;
}
 
 
void  dump_bin64(char* format, Buffer str)
{
    int  i;
 
    fprintf(stderr, format);
    for (i=0; i<str.vldsz; i++) fprintf(stderr, "%1d", str.buf[i]);
    fprintf(stderr, "\n");
}