PEM格式RSA密钥解析（二）

RSA密钥参数解析

上一部分讲解了将Base64编码的密钥数据转换成hex格式数据，本章将介绍如何获从转码后的数据中获取RSA密钥的相关参数。

根据 RSA 密钥语法中的结构对私钥解析结果如下：

上一节转码后的私钥为：

3082025B0201000281807538085EB2BEA6F95818707187EF87FA37369C1C48995C7E3D2721978

A1CB62F24E220CE457A7884CBA1B9756D771DED6BEF4B301F4571E8B333AA614ED487DDD82A

BA9D3BD32B9B1DDE1B4C9E6361AD5D45B4B8D30594052C730CC4E6C268253E90C116B4FFBFC

0AA540166122C0434ACFF0EF55EAB5AA3C2E0EBFC313AC7A10203010001028180651CD47B7B8C61D42C5DC880E65584E21DC6899B0C34DE4836D00E75FDB90E9E541E8B55E330E5CD072A962

3E92D1B2FB62F50984E214545096FC3C4F48EF832FB7ADB7A5BEC1F3041D4F2AECA729E692EF0

D906D634C2E8FBF99C1371D08BAD028E0AC7899EE44BE2C6BF33ADB08066EE88FAAD8FD893D

101A921C519C4D891024100E2E38FA005D7E086F6475F91ABB1644C398636EE19BFB284E16B9C

1804210733C45F3A51BDB033357B7DA3BAAD17CE1D78DDA9C69613158DB962B3541E0281E30

2410084423A45814E139CF1B6A10CD108A4399C0CB11BF78363C439692E5B465892BFAC3EE808

4F8CA33A3CC13C87583C4E2F30DED2780AB32B8E8A58010E4194F7AB024062DE22A1EAA9ED6F

22366BD0C06E667448C4D17EE3BD82FF207391EB6D312F40419BF57FD516C8D9CF5C2A529846

BD4C5E74C91C7E1D06D1612D3F53B258095D02404F83A596EDF36BD53A78EB005298186BCE46

CF201A41B2F460F3BC7C01A1F4B029B53438F2E281ABDCA4EC680E834B1A120E9488B91E18FCB

C6DC64CB4DF03BB024100B3FEB058F79C80A6D24B1FBE3E5C36819EB5366E053B5094EE00ED8

7431559DCA7ECAFF5987095AEA451E143F843DE104AC0E654AB22C4861770B604076E9CF5

结合上面的私钥，解析后如下：

n: 7538085EB2BEA6F95818707187EF87FA37369C1C48995C7E3D2721978A1CB62F24E220CE457A7

884CBA1B9756D771DED6BEF4B301F4571E8B333AA614ED487DDD82ABA9D3BD32B9B1DDE1B4

C9E6361AD5D45B4B8D30594052C730CC4E6C268253E90C116B4FFBFC0AA540166122C0434ACF

F0EF55EAB5AA3C2E0EBFC313AC7A1

e: 010001

d:651CD47B7B8C61D42C5DC880E65584E21DC6899B0C34DE4836D00E75FDB90E9E541E8B55E330

E5CD072A9623E92D1B2FB62F50984E214545096FC3C4F48EF832FB7ADB7A5BEC1F3041D4F2AEC

A729E692EF0D906D634C2E8FBF99C1371D08BAD028E0AC7899EE44BE2C6BF33ADB08066EE88F

AAD8FD893D101A921C519C4D891

P: （参数前多一个字节 00）00E2E38FA005D7E086F6475F91ABB1644C398636EE19BFB284E16B9C1804210733C45F3A51BDB

033357B7DA3BAAD17CE1D78DDA9C69613158DB962B3541E0281E3

q:（参数前多一个字节 00） 0084423A45814E139CF1B6A10CD108A4399C0CB11BF78363C439692E5B465892BFAC3EE8084F8

CA33A3CC13C87583C4E2F30DED2780AB32B8E8A58010E4194F7AB

dp: 62DE22A1EAA9ED6F22366BD0C06E667448C4D17EE3BD82FF207391EB6D312F40419BF57FD516

C8D9CF5C2A529846BD4C5E74C91C7E1D06D1612D3F53B258095D

dq: 4F83A596EDF36BD53A78EB005298186BCE46CF201A41B2F460F3BC7C01A1F4B029B53438F2E28

1ABDCA4EC680E834B1A120E9488B91E18FCBC6DC64CB4DF03BB

Qinv: （参数前多一个字节 00）

00B3FEB058F79C80A6D24B1FBE3E5C36819EB5366E053B5094EE00ED87431559DCA7ECAFF5987

095AEA451E143F843DE104AC0E654AB22C4861770B604076E9CF5

上一节转码后的公钥为：

30819E 300D06092A864886F70D0101010500 03818C 00308188 0281807538085EB2BEA6F95

818707187EF87FA37369C1C48995C7E3D2721978A1CB62F24E220CE457A7884CBA1B9756D771

DED6BEF4B301F4571E8B333AA614ED487DDD82ABA9D3BD32B9B1DDE1B4C9E6361AD5D45B4B

8D30594052C730CC4E6C268253E90C116B4FFBFC0AA540166122C0434ACFF0EF55EAB5AA3C2E0

EBFC313AC7A10203010001

根据 RSA 密钥语法中的结构对公钥解析结果如下：

n: 7538085EB2BEA6F95818707187EF87FA37369C1C48995C7E3D2721978A1CB62F24E220CE457A7

884CBA1B9756D771DED6BEF4B301F4571E8B333AA614ED487DDD82ABA9D3BD32B9B1DDE1B4

C9E6361AD5D45B4B8D30594052C730CC4E6C268253E90C116B4FFBFC0AA540166122C0434ACF

F0EF55EAB5AA3C2E0EBFC313AC7A1

e: 010001

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