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Hash函数 - 北京大学计算机科学技术研究所

Hash函数 - 北京大学计算机科学技术研究所

Hash函数 - 北京大学计算机科学技术研究所

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4.3.2 SHashŽ{SHA-1Ž{(µÑ\Ý|x| ≤ 2 64 − 1ÑÑÝ µ160'A¡•iöŠ§z‡i32'A"W¿Ž{µSHA-1-PAD(x)ržEx=z¤512êGy = x||1||0 d ||lÙ¥d ← (447 − |x|) mod 512,l ← |x|(|x|L«xÝ)?›L«§…Ý 64'A§XJˆØ64'AK3†>W¿0"¤¦^öŠµX ∧ Y XÚY Ü6/Ú0X ∨ Y XÚY Ü6/½0X ⊕ Y XÚY Ü6/ɽ0¬X XÜ6/Ö0X + Y 2 32 êÚ§u(X + Y ) ∧ (2 32 − 1)ROTL s (X) XÌ‚†£s‡ ˜(0 ≤ s ≤ 31)

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