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I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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48 lines
1.2 KiB
48 lines
1.2 KiB
#include <stdlib.h> |
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#include "aes.h" |
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namespace i2p |
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{ |
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namespace crypto |
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{ |
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void CBCEncryption::Encrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out) |
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{ |
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for (int i = 0; i < numBlocks; i++) |
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{ |
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m_LastBlock.ll[0] ^= in[i].ll[0]; |
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m_LastBlock.ll[1] ^= in[i].ll[1]; |
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m_ECBEncryption.ProcessData (m_LastBlock.buf, m_LastBlock.buf, 16); |
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out[i] = m_LastBlock; |
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} |
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} |
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bool CBCEncryption::Encrypt (const uint8_t * in, std::size_t len, uint8_t * out) |
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{ |
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div_t d = div (len, 16); |
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if (d.rem) return false; // len is not multipple of 16 |
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Encrypt (d.quot, (const ChipherBlock *)in, (ChipherBlock *)out); |
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return true; |
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} |
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void CBCDecryption::Decrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out) |
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{ |
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for (int i = 0; i < numBlocks; i++) |
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{ |
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ChipherBlock tmp = in[i]; |
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m_ECBDecryption.ProcessData (out[i].buf, in[i].buf, 16); |
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out[i].ll[0] ^= m_IV.ll[0]; |
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out[i].ll[1] ^= m_IV.ll[1]; |
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m_IV = tmp; |
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} |
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} |
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bool CBCDecryption::Decrypt (const uint8_t * in, std::size_t len, uint8_t * out) |
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{ |
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div_t d = div (len, 16); |
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if (d.rem) return false; // len is not multipple of 16 |
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Decrypt (d.quot, (const ChipherBlock *)in, (ChipherBlock *)out); |
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return true; |
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} |
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} |
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} |
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