OpenSSL对称加密算法中怎么样添加新算法

for(i=0; i<8;>

iv[i] = in[i];

}

/*final block*/

if(l != -8)

{

decrypt(in, buf, key, &len);

for(i=0; i

out[i] = buf[i] ^ iv[i];

for(i=0; i<8;>

iv[i] = in[i];

}

}

l = 0;

i = 0;

}

void cfb64_encrypt(const unsigned char *in, unsigned char *out,

long length, const KEY *key, unsigned char *iv, int *num, int enc)

{/* 密码反馈模式 */

register long l = length;

unsigned char buf[8];

register int i, save = 0, n = *num;/*start from previously saved processing position*/

int len = 8;

/*restore from previously saved iv*/

for(i=n; i<8;>

buf[i] = iv[i];

if(enc)

{

while(l--)

{

if(n == 0)

{

encrypt(iv, buf, key, &len);

save = 1;

}

*(out++) = iv[n] = *(in++) ^ buf[n];

n = (n+1)&0x07;

}

}

else

{

while(l--)

{

if(n == 0)

{

encrypt(iv, buf, key, &len);

save = 1;

}

*(out++) = (iv[n]=*(in++)) ^ buf[n];

n = (n+1)&0x07;

}

}

if(save)/*store encrypted data into iv for next encryption*/

for(i=n; i<8;>

iv[i] = buf[i];

/* cfb加密输出得结果作为下次得IV, in与加密IV的结果作异或运算的结果作为cfb加密的输出 */

*num = n;/*store current processing position as entry of next encryption*/

save = i = n = 0;

}

void ofb64_encrypt(const unsigned char *in, unsigned char *out,

long length, const KEY *key, unsigned char *iv, int *num)

{/* 输出反馈模式 */

register long l = length;

register int i, n = *num;/*start from previously saved processing position*/

int len = 8;

unsigned char buf[8];

/*restore from previously saved iv*/