RSA公钥格式PKCS#1,PKCS#8互转（微信获取RSA加密公钥）

最新推荐文章于 2025-07-30 16:15:32 发布

流风回雪1988

最新推荐文章于 2025-07-30 16:15:32 发布

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本文详细介绍了如何使用Java代码和OpenSSL命令将RSA公钥在PKCS#1和PKCS#8格式之间进行转换。通过具体示例展示了不同格式的公钥，并提供了一段Python脚本来批量处理密钥文件。

/把RSA公钥格式PKCS#1转换成PKCS#8
        org.bouncycastle.asn1.pkcs.RSAPublicKey rsaPublicKey =  org.bouncycastle.asn1.pkcs.RSAPublicKey.getInstance(

org.bouncycastle.util.encoders.Base64.decode(publicKeyString));


        java.security.spec.RSAPublicKeySpec publicKeySpec = new java.security.spec.RSAPublicKeySpec(rsaPublicKey.getModulus(), rsaPublicKey.getPublicExponent());

        java.security.KeyFactory keyFactory = java.security.KeyFactory.getInstance("RSA");

        java.security.PublicKey publicKey = keyFactory.generatePublic(publicKeySpec);

复制代码

RSA公钥格式PKCS#1,PKCS#8互转说明（命令的方式）

PKCS#1 转 PKCS#8:

openssl rsa -RSAPublicKey_in -in <filename> -pubout

PKCS#8 转 PKCS#1:

openssl rsa -pubin -in <filename> -RSAPublicKey_out

PKCS#1 格式密钥：

PKCS#8 格式密钥：

#!/usr/bin/env python
# coding: utf8
#***************************************************************************************************

import argparse
import sys, glob, os
import xml.etree.ElementTree as xmltree

#***************************************************************************************************
class dsn(object):
class AccessDSNFileError(Exception):
pass

class InvalidDSNFileFormat(SyntaxError):
pass

def __init__(self, **kwargs):
if 'file' in kwargs:
self.dsn = None
self.pubkey = None
try:
xml = xmltree.parse (kwargs['file'])
if xml:
f_device = xml.getroot ()
if f_device.tag == 'f-device':
for child in f_device:
if child.tag == 'dsn':
self.dsn = child.text
elif child.tag == 'public-key':
self.pubkey = child.text

if self.dsn is None or self.pubkey is None:
raise SyntaxError

except SyntaxError:
raise dsn.InvalidDSNFileFormat
except:
raise dsn.AccessDSNFileError

elif 'dsn' in kwargs and 'pubkey' in kwargs:
self.dsn = kwargs['dsn']
self.pubkey = kwargs['pubkey']

#***************************************************************************************************
# main
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('dsn_file', help='DSN file')
args = parser.parse_args()

for file in glob.glob (args.dsn_file):
try:
info = dsn (file=file)
BEGIN = '-----BEGIN PUBLIC KEY-----'
END = '-----END PUBLIC KEY-----'
with os.popen ('openssl rsa -pubin -RSAPublicKey_in << END\n' + info.pubkey + '\nEND\n') as f:
pubkey = f.read ()
i1 = pubkey.find (BEGIN)
i2 = pubkey.find (END)
if i1 >= 0 and i2 > i1:
pubkey = pubkey[i1+len (BEGIN):i2]
pubkey = pubkey.replace ('\n', '')

print
print 'id dev_id {}'.format (info.dsn)
print 'file start 0'
s = pubkey
len = 80
while s:
print 'file add {}'.format (s[:len])
s = s[len:]
print 'conf save'
except:
import traceback
traceback.print_exc ()

#***************************************************************************************************

微信企业付款到银行卡(包含获取微信端的RSA公钥)参考文章：

https://www.jianshu.com/p/efb1dcce6e4a