34 lines
641 B
C
34 lines
641 B
C
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#pragma once
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#include <vector>
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#include <cstdint>
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#include <string>
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// Encode for IP and Port.
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// provided by ChatGPT.
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class StreamCipher {
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private:
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uint32_t state;
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// <20><EFBFBD><F2B5A5B7><EFBFBD><EFBFBD><EFBFBD>α<EFBFBD><CEB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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uint8_t prngNext() {
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// <20><><EFBFBD>ӣ<EFBFBD>xorshift32<33><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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state ^= (state << 13);
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state ^= (state >> 17);
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state ^= (state << 5);
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// <20>ٻ<EFBFBD><D9BB><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ķ<F2B5A5B5><C4B7><EFBFBD><EFBFBD>Ա任
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uint8_t out = (state & 0xFF) ^ ((state >> 8) & 0xFF);
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return out;
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}
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public:
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StreamCipher(uint32_t key) : state(key) {}
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// <20><><EFBFBD>ܽ<EFBFBD><DCBD>ܣ<EFBFBD><DCA3>Գƣ<D4B3><C6A3><EFBFBD><EFBFBD>Ȳ<EFBFBD><C8B2>䣩
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void process(uint8_t* data, size_t len) {
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for (size_t i = 0; i < len; ++i) {
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data[i] ^= prngNext();
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}
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}
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};
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