[eside-ghost] Re: Sylpheed password recovery (??)

[Cymo]

Venga a ver...

Me he bajado las fuentes del sylpheed para w32...

No me ha costado ni dos segundos encontrar estos ficheros:

common/passcrypt.h
common/passcrypt.c

Tenemos una función:

void passcrypt_decrypt(gchar *password, guint len)
{
	crypt_cfb_buf(PASSCRYPT_KEY, password, len, 1, 1 );
}

Y si buscamos lo que hace crypt_cfb_buf, vemos que usa DES...

En fin, con eso espero que no te cueste mucho recuperarla.

unsigned char crypt_cfb_iv[64];
int crypt_cfb_blocksize = 8;	/* 8 for DES */

void
crypt_cfb_buf(const char key[8], unsigned char *buf, unsigned len,
	      unsigned chunksize, int decrypt)
{
	unsigned char temp[64];

	memcpy(temp, key, 8);
	crypt_unpack(temp);
	setkey((const char *) temp);
	memset(temp, 0, sizeof(temp));

	memset(crypt_cfb_iv, 0, sizeof(crypt_cfb_iv));

	if (chunksize > crypt_cfb_blocksize)
		chunksize = crypt_cfb_blocksize;

	while (len) {
		memcpy(temp, crypt_cfb_iv, sizeof(temp));
		encrypt((char *) temp, 0);
		if (chunksize > len)
			chunksize = len;
		if (decrypt)
			crypt_cfb_shift(crypt_cfb_iv, buf, chunksize);
		crypt_cfb_xor((unsigned char *) buf, temp, chunksize);
		if (!decrypt)
			crypt_cfb_shift(crypt_cfb_iv, buf, chunksize);
		len -= chunksize;
#ifdef WIN32
		(char*)buf += chunksize;
#else
		buf += chunksize;
#endif
	}
}