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https://opencores.org/ocsvn/csa/csa/trunk
[/] [csa/] [trunk/] [sw_sim/] [csa.c] - Diff between revs 41 and 42
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| Rev 41 |
Rev 42 |
| Line 382... |
Line 382... |
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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/* 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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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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DEBUG_OUTPUT_ARR(ib,8);
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DEBUG_OUTPUT_ARR(block,8);
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if (j != N) {
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if (j != N) {
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stream_cypher(0, ck, NULL, stream);
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stream_cypher(0, ck, NULL, stream);
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/* xor sb x stream */
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/* xor sb x stream */
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| Line 399... |
Line 400... |
else {
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else {
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/* last block - sb[N+1] = IV(initialisation vetor)(=0) */
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/* last block - sb[N+1] = IV(initialisation vetor)(=0) */
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for(i=0; i<8; i++) ib[i] = 0;
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for(i=0; i<8; i++) ib[i] = 0;
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}
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}
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#if 0
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fprintf(stderr,"output \n");
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DEBUG_OUTPUT_ARR(ib,8);
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DEBUG_OUTPUT_ARR(block,8);
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#endif
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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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} /* for(j=1; j<(N+1); j++) */
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} /* for(j=1; j<(N+1); j++) */
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