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[/] [csa/] [trunk/] [sw_sim/] [csa.c] - Diff between revs 20 and 22

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Rev 20	Rev 22
Line 291...	Line 291...
`kb[6-i][1+j] \|= newbit[j*8+k] << (7-k);`	`kb[6-i][1+j] \|= newbit[j*8+k] << (7-k);`
`}`	`}`
`}`	`}`
`}`	`}`

`#ifdef DEBUG`
`{`
`int i;`
`int p=(int)kb;`
`for(i=65*8-1;i>=8;i--)`
`{`
`if(p[i/8]&(1<<(i%8)))`
`printf("1");`
`else`
`printf("0");`
`}`
`printf("\n");`
`}`
`#endif`
`/* xor to give kk */`	`/* xor to give kk */`
`for(i=0; i<7; i++) {`	`for(i=0; i<7; i++) {`
`for(j=0; j<8; j++) {`	`for(j=0; j<8; j++) {`
`kk[1+i*8+j] = kb[1+i][1+j] ^ i;`	`kk[1+i*8+j] = kb[1+i][1+j] ^ i;`
`}`	`}`
`}`	`}`

`}`	`}`

`void block_decypher(int kk, unsigned char ib, unsigned char *bd) {`	`void block_decypher(int kk, unsigned char ib, unsigned char *bd) {`
`int i;`	`int i;`
`int sbox_in;`	`int sbox_in;`
Line 393...	Line 378...
`N = (188 - offset) / 8;`	`N = (188 - offset) / 8;`
`residue = (188 - offset) % 8;`	`residue = (188 - offset) % 8;`

`/* 1st 8 bytes of initialisation */`	`/* 1st 8 bytes of initialisation */`
`stream_cypher(1, ck, &encrypted[offset], ib);`	`stream_cypher(1, ck, &encrypted[offset], ib);`
	`DEBUG_OUTPUT_ARR(ib,8);`

`for(j=1; j<(N+1); j++) {`	`for(j=1; j<(N+1); j++) {`
`block_decypher(kk, ib, block);`	`block_decypher(kk, ib, block);`

`if (j != N) {`	`if (j != N) {`
Line 412...	Line 398...
`}`	`}`

`/* xor ib x block */`	`/* xor ib x block */`
`for(i=0; i<8; i++)`	`for(i=0; i<8; i++)`
`decrypted[offset+8*(j-1)+i] = ib[i] ^ block[i];`	`decrypted[offset+8*(j-1)+i] = ib[i] ^ block[i];`
	`DEBUG_OUTPUT_ARR(ib,8);`
	`DEBUG_OUTPUT_ARR(block,8);`
	`DEBUG_OUTPUT_ARR(&decrypted[offset+8*(j-1)+0],8);`
`} /* for(j=1; j<(N+1); j++) */`	`} /* for(j=1; j<(N+1); j++) */`

`if (residue) {`	`if (residue) {`
`stream_cypher(0, ck, NULL, stream);`	`stream_cypher(0, ck, NULL, stream);`
`for (i=0;i<residue;i++)`	`for (i=0;i<residue;i++)`

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[/] [csa/] [trunk/] [sw_sim/] [csa.c] - Diff between revs 20 and 22