TSEC: Difference between revisions
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ckeyreg(c4); | ckeyreg(c4); | ||
// AES-128- | // AES-128-CBC decrypt | ||
if (mode == 0x00) | if (mode == 0x00) | ||
{ | { | ||
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cmov(c5, c3); // Move c3 into c5 | cmov(c5, c3); // Move c3 into c5 | ||
} | } | ||
else if (mode == 0x01) // AES-128- | else if (mode == 0x01) // AES-128-CBC encrypt | ||
{ | { | ||
// Create crypto script with 4 instructions | // Create crypto script with 4 instructions | ||
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cenc(c5, c5); // Encrypt from c5 into c5 | cenc(c5, c5); // Encrypt from c5 into c5 | ||
} | } | ||
else if (mode == 0x03) // AES-128-ECB decrypt | else if (mode == 0x03) // AES-128-ECB decrypt | ||
{ | { | ||
// Create crypto script with 3 instructions | // Create crypto script with 3 instructions | ||
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cxsout(c5); // Write 0x10 bytes into crypto stream from c5 | cxsout(c5); // Write 0x10 bytes into crypto stream from c5 | ||
} | } | ||
else if (mode == 0x04) // AES-128-ECB encrypt | else if (mode == 0x04) // AES-128-ECB encrypt | ||
{ | { | ||
// Create crypto script with 3 instructions | // Create crypto script with 3 instructions | ||
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<code>00000000: f5 3c XY e0 cchmod $cY $cX</code> - likely forces a change of permissions. | <code>00000000: f5 3c XY e0 cchmod $cY $cX</code> - likely forces a change of permissions. | ||
<code>00000000: f5 3c XY a8 | <code>00000000: f5 3c XY a8 c_unk0 $cY $cX</code> - unknown crypto operation. | ||
<code>00000000: f5 3c XY a9 c_unk1 $cY $cX</code> - unknown crypto operation. | |||
<code>00000000: f5 3c 0X 90 crng $cX</code> - seems to initialize a crypto register with random data. | <code>00000000: f5 3c 0X 90 crng $cX</code> - seems to initialize a crypto register with random data. | ||