| Line 261... |
Line 261... |
int i,j,k;
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int i,j,k;
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int bit[64];
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int bit[64];
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int newbit[64];
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int newbit[64];
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int kb[9][8];
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int kb[9][8];
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DEBUG_OUTPUT_ARR(CK,8);
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|
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/* 56 steps */
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/* 56 steps */
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/* 56 key bytes kk(56)..kk(1) by key schedule from CK */
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/* 56 key bytes kk(56)..kk(1) by key schedule from CK */
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/* kb(7,1) .. kb(7,8) = CK(1) .. CK(8) */
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/* kb(7,1) .. kb(7,8) = CK(1) .. CK(8) */
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kb[7][1] = CK[0];
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kb[7][1] = CK[0];
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| Line 290... |
Line 292... |
for(k=0; k<8; k++) {
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for(k=0; k<8; k++) {
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kb[6-i][1+j] |= newbit[j*8+k] << (7-k);
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kb[6-i][1+j] |= newbit[j*8+k] << (7-k);
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}
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}
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}
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}
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}
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}
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DEBUG_OUTPUT_ARR(kb[0],9);
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DEBUG_OUTPUT_ARR(kb[1],9);
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DEBUG_OUTPUT_ARR(kb[2],9);
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DEBUG_OUTPUT_ARR(kb[3],9);
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DEBUG_OUTPUT_ARR(kb[4],9);
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DEBUG_OUTPUT_ARR(kb[5],9);
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DEBUG_OUTPUT_ARR(kb[6],9);
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DEBUG_OUTPUT_ARR(kb[7],9);
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DEBUG_OUTPUT_ARR(kb[8],9);
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DEBUG_OUTPUT_ARR(kb[9],9);
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/* xor to give kk */
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/* xor to give kk */
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for(i=0; i<7; i++) {
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for(i=0; i<7; i++) {
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for(j=0; j<8; j++) {
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for(j=0; j<8; j++) {
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kk[1+i*8+j] = kb[1+i][1+j] ^ i;
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kk[1+i*8+j] = kb[1+i][1+j] ^ i;
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}
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}
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}
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}
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DEBUG_OUTPUT_ARR(&kk[1],56);
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}
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}
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void block_decypher(int *kk, unsigned char *ib, unsigned char *bd) {
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void block_decypher(int *kk, unsigned char *ib, unsigned char *bd) {
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int i;
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int i;
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int sbox_in;
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int sbox_in;
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| Line 350... |
Line 363... |
void set_cws(unsigned char *cws, struct key *key) {
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void set_cws(unsigned char *cws, struct key *key) {
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memcpy(key->odd_ck,cws+8,8);
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memcpy(key->odd_ck,cws+8,8);
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memcpy(key->even_ck,cws,8);
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memcpy(key->even_ck,cws,8);
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key_schedule(key->odd_ck,key->odd_kk);
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key_schedule(key->odd_ck,key->odd_kk);
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key_schedule(key->even_ck,key->even_kk);
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key_schedule(key->even_ck,key->even_kk);
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DEBUG_OUTPUT_ARR(key->even_kk,57);
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DEBUG_OUTPUT_ARR(key->odd_kk,57);
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}
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}
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|
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void decrypt(struct key *key, unsigned char *encrypted, unsigned char *decrypted) {
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void decrypt(struct key *key, unsigned char *encrypted, unsigned char *decrypted) {
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int i,j,offset=4,N;
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int i,j,offset=4,N;
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int *kk=key->even_kk;
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int *kk=key->even_kk;
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| Line 378... |
Line 393... |
N = (188 - offset) / 8;
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N = (188 - offset) / 8;
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residue = (188 - offset) % 8;
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residue = (188 - offset) % 8;
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|
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/* 1st 8 bytes of initialisation */
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/* 1st 8 bytes of initialisation */
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stream_cypher(1, ck, &encrypted[offset], ib);
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stream_cypher(1, ck, &encrypted[offset], ib);
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DEBUG_OUTPUT_ARR(ib,8);
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|
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for(j=1; j<(N+1); j++) {
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for(j=1; j<(N+1); j++) {
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block_decypher(kk, ib, block);
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block_decypher(kk, ib, block);
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|
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if (j != N) {
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if (j != N) {
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| Line 398... |
Line 412... |
}
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}
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|
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/* xor ib x block */
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/* xor ib x block */
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for(i=0; i<8; i++)
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for(i=0; i<8; i++)
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decrypted[offset+8*(j-1)+i] = ib[i] ^ block[i];
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decrypted[offset+8*(j-1)+i] = ib[i] ^ block[i];
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DEBUG_OUTPUT_ARR(ib,8);
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DEBUG_OUTPUT_ARR(block,8);
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DEBUG_OUTPUT_ARR(&decrypted[offset+8*(j-1)+0],8);
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} /* for(j=1; j<(N+1); j++) */
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} /* for(j=1; j<(N+1); j++) */
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|
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if (residue) {
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if (residue) {
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stream_cypher(0, ck, NULL, stream);
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stream_cypher(0, ck, NULL, stream);
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for (i=0;i<residue;i++)
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for (i=0;i<residue;i++)
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