使用openssl dgst验证文件签名

问题描述

我在一些Java代码中签名数据包，我想验证C服务器上的签名。我想fork openssl为此目的（总是可以使用库函数后...当我知道openssl可以验证签名）;但是，它没有这样做：

I am signing packets in some Java code and I want to verify the signatures on a C server. I want to fork openssl for this purpose (can always use library functions later... when I know openssl can verify the signatures); however, it's failing to do so:

openssl dgst -verify cert.pem -signature file.sha1 file.data

• 所有内容都是 无法加载密钥文件
  

  证书说明：

  openssl verify cert.pem
  
  cert.pem: /C=....
  error 20 at 0 depth lookup:unable to get local issuer certificate
  

  但是，我特别不在乎验证证书，我只想验证签名给定文件！

  However, I specifically don't care about verifying the certificate, I want only to verify the signature for a given file!

  openssl x509 -in cert.pem -noout -text 的输出是： p>
  
  

  The output of openssl x509 -in cert.pem -noout -text is:

  Certificate:
      Data:
          Version: 1 (0x0)
          Serial Number:
              ...
          Signature Algorithm: sha1WithRSAEncryption
          Issuer: C=...
          Validity
              Not Before: Feb  1 15:22:44 2010 GMT
              Not After : Jun 19 15:22:44 2037 GMT
          Subject: C=...
          Subject Public Key Info:
              Public Key Algorithm: rsaEncryption
              RSA Public Key: (2048 bit)
                  Modulus (2048 bit):
                      00:cc:cc:f9:c7:3a:00:0f:07:90:55:d9:fb:a9:fe:
                      ...
                      32:cc:ee:7f:f2:01:c7:35:d2:b5:9b:35:dd:69:76:
                      00:a9
                  Exponent: 65537 (0x10001)
      Signature Algorithm: sha1WithRSAEncryption
          39:d6:2c:6b:6a:00:74:b5:81:c2:b8:60:d6:6b:54:11:41:8d:
          ...
          8f:3e:3f:5d:b3:f8:dd:5e
  

  
  

  推荐答案

  openssl dgst -verify foo.pem 预期 foo.pem 包含PEM格式的原始公钥。原始格式是 SubjectPublicKeyInfo 结构的编码，可以在证书中找到;但 openssl dgst 无法一次处理完整的证书。

  openssl dgst -verify foo.pem expects that foo.pem contains the "raw" public key in PEM format. The raw format is an encoding of a SubjectPublicKeyInfo structure, which can be found within a certificate; but openssl dgst cannot process a complete certificate in one go.

  您必须先从证书中提取公钥：

  You must first extract the public key from the certificate:

  openssl x509 -pubkey -noout -in cert.pem > pubkey.pem
  

  然后使用键验证签名：

  openssl dgst -verify pubkey.pem -signature sigfile datafile
  

  这篇关于使用openssl dgst验证文件签名的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！