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SASC
DVBSoftCAM
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SASC
DVBSoftCAM
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Go to the source code of this file.
Classes | |
| struct | idea_key_st |
Defines | |
| #define | IDEA_INT unsigned int |
| #define | IDEA_ENCRYPT 1 |
| #define | IDEA_DECRYPT 0 |
| #define | IDEA_BLOCK 8 |
| #define | IDEA_KEY_LENGTH 16 |
Typedefs | |
| typedef struct idea_key_st | IDEA_KEY_SCHEDULE |
Functions | |
| const char * | idea_options (void) |
| void | idea_ecb_encrypt (const unsigned char *in, unsigned char *out, IDEA_KEY_SCHEDULE *ks) |
| void | idea_set_encrypt_key (const unsigned char *key, IDEA_KEY_SCHEDULE *ks) |
| void | idea_set_decrypt_key (IDEA_KEY_SCHEDULE *ek, IDEA_KEY_SCHEDULE *dk) |
| void | idea_cbc_encrypt (const unsigned char *in, unsigned char *out, long length, IDEA_KEY_SCHEDULE *ks, unsigned char *iv, int enc) |
| void | idea_cfb64_encrypt (const unsigned char *in, unsigned char *out, long length, IDEA_KEY_SCHEDULE *ks, unsigned char *iv, int *num, int enc) |
| void | idea_ofb64_encrypt (const unsigned char *in, unsigned char *out, long length, IDEA_KEY_SCHEDULE *ks, unsigned char *iv, int *num) |
| void | idea_encrypt (unsigned long *in, IDEA_KEY_SCHEDULE *ks) |
| typedef struct idea_key_st IDEA_KEY_SCHEDULE |
| void idea_cbc_encrypt | ( | const unsigned char * | in, |
| unsigned char * | out, | ||
| long | length, | ||
| IDEA_KEY_SCHEDULE * | ks, | ||
| unsigned char * | iv, | ||
| int | enc | ||
| ) |
Definition at line 62 of file i_cbc.c.
References idea_encrypt(), l2n, l2nn, n2l, and n2ln.
Referenced by cIDEA::Decrypt(), and cIDEA::Encrypt().
{
register unsigned long tin0,tin1;
register unsigned long tout0,tout1,xor0,xor1;
register long l=length;
unsigned long tin[2];
if (encrypt)
{
n2l(iv,tout0);
n2l(iv,tout1);
iv-=8;
for (l-=8; l>=0; l-=8)
{
n2l(in,tin0);
n2l(in,tin1);
tin0^=tout0;
tin1^=tout1;
tin[0]=tin0;
tin[1]=tin1;
idea_encrypt(tin,ks);
tout0=tin[0]; l2n(tout0,out);
tout1=tin[1]; l2n(tout1,out);
}
if (l != -8)
{
n2ln(in,tin0,tin1,l+8);
tin0^=tout0;
tin1^=tout1;
tin[0]=tin0;
tin[1]=tin1;
idea_encrypt(tin,ks);
tout0=tin[0]; l2n(tout0,out);
tout1=tin[1]; l2n(tout1,out);
}
l2n(tout0,iv);
l2n(tout1,iv);
}
else
{
n2l(iv,xor0);
n2l(iv,xor1);
iv-=8;
for (l-=8; l>=0; l-=8)
{
n2l(in,tin0); tin[0]=tin0;
n2l(in,tin1); tin[1]=tin1;
idea_encrypt(tin,ks);
tout0=tin[0]^xor0;
tout1=tin[1]^xor1;
l2n(tout0,out);
l2n(tout1,out);
xor0=tin0;
xor1=tin1;
}
if (l != -8)
{
n2l(in,tin0); tin[0]=tin0;
n2l(in,tin1); tin[1]=tin1;
idea_encrypt(tin,ks);
tout0=tin[0]^xor0;
tout1=tin[1]^xor1;
l2nn(tout0,tout1,out,l+8);
xor0=tin0;
xor1=tin1;
}
l2n(xor0,iv);
l2n(xor1,iv);
}
tin0=tin1=tout0=tout1=xor0=xor1=0;
tin[0]=tin[1]=0;
}
| void idea_cfb64_encrypt | ( | const unsigned char * | in, |
| unsigned char * | out, | ||
| long | length, | ||
| IDEA_KEY_SCHEDULE * | ks, | ||
| unsigned char * | iv, | ||
| int * | num, | ||
| int | enc | ||
| ) |
| void idea_ecb_encrypt | ( | const unsigned char * | in, |
| unsigned char * | out, | ||
| IDEA_KEY_SCHEDULE * | ks | ||
| ) |
Definition at line 62 of file i_ecb.c.
References idea_encrypt(), l2n, and n2l.
Referenced by cIDEA::EcbEncrypt().
{
unsigned long l0,l1,d[2];
n2l(in,l0); d[0]=l0;
n2l(in,l1); d[1]=l1;
idea_encrypt(d,ks);
l0=d[0]; l2n(l0,out);
l1=d[1]; l2n(l1,out);
l0=l1=d[0]=d[1]=0;
}
| void idea_encrypt | ( | unsigned long * | in, |
| IDEA_KEY_SCHEDULE * | ks | ||
| ) |
Definition at line 136 of file i_cbc.c.
References idea_key_st::data, E_IDEA, IDEA_INT, and idea_mul.
Referenced by idea_cbc_encrypt(), and idea_ecb_encrypt().
{
register IDEA_INT *p;
register unsigned long x1,x2,x3,x4,t0,t1,ul;
x2=d[0];
x1=(x2>>16);
x4=d[1];
x3=(x4>>16);
p= &(key->data[0][0]);
E_IDEA(0);
E_IDEA(1);
E_IDEA(2);
E_IDEA(3);
E_IDEA(4);
E_IDEA(5);
E_IDEA(6);
E_IDEA(7);
x1&=0xffff;
idea_mul(x1,x1,*p,ul); p++;
t0= x3+ *(p++);
t1= x2+ *(p++);
x4&=0xffff;
idea_mul(x4,x4,*p,ul);
d[0]=(t0&0xffff)|((x1&0xffff)<<16);
d[1]=(x4&0xffff)|((t1&0xffff)<<16);
}
| void idea_ofb64_encrypt | ( | const unsigned char * | in, |
| unsigned char * | out, | ||
| long | length, | ||
| IDEA_KEY_SCHEDULE * | ks, | ||
| unsigned char * | iv, | ||
| int * | num | ||
| ) |
| const char* idea_options | ( | void | ) |
| void idea_set_decrypt_key | ( | IDEA_KEY_SCHEDULE * | ek, |
| IDEA_KEY_SCHEDULE * | dk | ||
| ) |
Definition at line 97 of file i_skey.c.
References idea_key_st::data, IDEA_INT, and inverse().
Referenced by cIDEA::SetDecKey().
{
int r;
register IDEA_INT *fp,*tp,t;
tp= &(dk->data[0][0]);
fp= &(ek->data[8][0]);
for (r=0; r<9; r++)
{
*(tp++)=inverse(fp[0]);
*(tp++)=((int)(0x10000L-fp[2])&0xffff);
*(tp++)=((int)(0x10000L-fp[1])&0xffff);
*(tp++)=inverse(fp[3]);
if (r == 8) break;
fp-=6;
*(tp++)=fp[4];
*(tp++)=fp[5];
}
tp= &(dk->data[0][0]);
t=tp[1];
tp[1]=tp[2];
tp[2]=t;
t=tp[49];
tp[49]=tp[50];
tp[50]=t;
}
| void idea_set_encrypt_key | ( | const unsigned char * | key, |
| IDEA_KEY_SCHEDULE * | ks | ||
| ) |
Definition at line 63 of file i_skey.c.
References idea_key_st::data, i, IDEA_INT, and n2s.
Referenced by cIDEA::Decrypt(), cIDEA::Encrypt(), cIDEA::SetDecKey(), and cIDEA::SetEncKey().
{
int i;
register IDEA_INT *kt,*kf,r0,r1,r2;
kt= &(ks->data[0][0]);
n2s(key,kt[0]); n2s(key,kt[1]); n2s(key,kt[2]); n2s(key,kt[3]);
n2s(key,kt[4]); n2s(key,kt[5]); n2s(key,kt[6]); n2s(key,kt[7]);
kf=kt;
kt+=8;
for (i=0; i<6; i++)
{
r2= kf[1];
r1= kf[2];
*(kt++)= ((r2<<9) | (r1>>7))&0xffff;
r0= kf[3];
*(kt++)= ((r1<<9) | (r0>>7))&0xffff;
r1= kf[4];
*(kt++)= ((r0<<9) | (r1>>7))&0xffff;
r0= kf[5];
*(kt++)= ((r1<<9) | (r0>>7))&0xffff;
r1= kf[6];
*(kt++)= ((r0<<9) | (r1>>7))&0xffff;
r0= kf[7];
*(kt++)= ((r1<<9) | (r0>>7))&0xffff;
r1= kf[0];
if (i >= 5) break;
*(kt++)= ((r0<<9) | (r1>>7))&0xffff;
*(kt++)= ((r1<<9) | (r2>>7))&0xffff;
kf+=8;
}
}
1.7.3