易霖博CTF-easyRSA

rsa解密

给了flag.en和rsa_private_key.pem私钥，直接用openssl解密，得到flag{We1c0meCtf3r_elab}

也可用python解密:

import rsa
def decrypt(crypt_text):  # 用私钥解密
    with open('rsa_private_key.pem', 'rb') as privatefile:
        p = privatefile.read()
    privkey = rsa.PrivateKey.load_pkcs1(p)
    lase_text = rsa.decrypt(crypt_text, privkey).decode()
    print(lase_text)
if __name__ == '__main__':
    with open('flag.en', 'rb') as publickfile:
        p = publickfile.read()
    lase_text =  decrypt(p)