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使用PHP/Python验证ECDSA签名

boringssl php-openssl python android php

1

ThanhLam112358 · 技术社区 · 8 年前

我编写了使用spongycastle库在Android上生成ECDSA签名的代码。然后我将符号字符串和公钥发送到服务器(Ubuntu 16.04),并尝试使用php和python来验证这个符号。

我在我的android应用程序上进行了测试验证。它运行良好。

我不知道,我哪里错了。

为什么ECDSA验证失败?

生成签名(android):

ECNamedCurveParameterSpec spec = ECNamedCurveTable.getParameterSpec("prime256v1");
try {
    KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA","SC");
    g.initialize(spec, new SecureRandom());
    KeyPair keyPair = g.generateKeyPair();
    privateKey = keyPair.getPrivate();
    publicKey = keyPair.getPublic();
    ///write public key to pem file
    ......
    FileOutputStream fileOutputStream1 = new FileOutputStream(file1);
    StringWriter writer1 = new StringWriter();
    PemWriter pemWriter1 = new PemWriter(writer1);
    pemWriter1.writeObject(new PemObject("PUBLIC KEY",publicKey.getEncoded()));
    pemWriter1.flush();
    pemWriter1.close();
    String publickeyPem = writer1.toString();
    fileOutputStream1.write(publickeyPem.getBytes());
    fileOutputStream1.close();
    } catch (Exception e) {
        e.printStackTrace();}
    ......
    //Sign and veryfied
     String chuoi = txtChuoi.getText().toString();
     byte[] chuoiInput = chuoi.getBytes("UTF-8");
     Signature sig = Signature.getInstance("NONEwithECDSA","SC");
     sig.initSign(privateKey);
     sig.update(chuoiInput);
     ///SIGN
     byte[] signatureBytes = sig.sign()
     txtMaHoa.setText(Base64.encodeToString(signatureBytes,Base64.DEFAULT));
     sig.initVerify(publicKey);
     sig.update(chuoiInput);
     ///VERIFIED
     txtGiaiMa.setText(sig.verify(signatureBytes)+"");
     ///Write string sign in txtMahoa to file
     .......

(Signature string) MEYCIQC7Hz631IFGsUOogcRLeN99uM9hWgLr+LGzuJvR/6nBrgIhAMXgZcvXyMRCAELXlNNS1a9j iAT1x0q2C5Mdu+2aZKtN

(公钥)

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEj07XEM+ulPyrdsfAf9prN2L2dNUd /Yy0rABcFdueAwYUf86f8Cc93Ws6sxzIvf2iKOapFby7EjHewjhLM/z7Qg==
 -----END PUBLIC KEY-----

使用PHP验证:

$pubkeyid = openssl_pkey_get_public("/var/www/html/ca.pem");

$data = "nguyen tran thanh Lam";

 $signature =
  "MEYCIQC7Hz631IFGsUOogcRLeN99uM9hWgLr+LGzuJvR/6nBrgIhAMXgZcvXyMRCAELXlNNS1a9jiAT1x0q2C5Mdu+2aZKtN";
$ok = openssl_verify($data, $signature, $pubkeyid);
if ($ok == 1) {
echo "good";
} elseif ($ok == 0) {
   echo "bad";
} else {
echo "ugly, error checking signature";
}
?>

1 回复 | 直到 8 年前

1

2

stovfl 8 年前

如果 crypto.verify(...
使用错误的证书、签名或数据进行验证

议论 :您对add base64.B64解码有何看法。。。因为在android代码中我有这个 linetxtMaHoa.setText(Base64.encodeToString(signatureBytes,Baââse64.DEFAULT));

PEM base64 .setText(Base64... 可以省略。现在,我已经用更新了下面的代码 base64.b64decode .

问题 :示例----b“sha256”?“b”是二进制(内置函数,或者我必须将字符串sha256转换为二进制?)

仅作为字符串对我有效( digest-names

import pem, base64
from OpenSSL import crypto

signature  = b"MEYCIQC7Hz631IFGsUOogcRLeN99uM9hWgLr+LGzuJvR/6nBrgIhAMXgZcvXyMRCAELXlNNS1a9jiAT1x0q2C5Mdu+2aZKtN"

# As Creator of the Signatur do additional base64 encoding!
signature = base64.b64decode(signature)

data = "nguyen tran thanh Lam"

certificate = pem.parse_file('Android.pem')[0]
cert = crypto.load_certificate(crypto.FILETYPE_PEM, certificate.as_bytes())

try:
    crypto.verify(cert=cert, signature=signature, data=data, digest='sha256')
except crypto.Error as exp:
    print('crypto.Error:{}'.format(exp.args))

>>>crypto.Error:([('', 'ECDSA_do_verify', 'bad signature')],)

笔记 :抛出 crypto.Error 因为没有使用 certificate signature .

OpenSSL.crypto.verify(certificate, signature, data, digest)

验证数据字符串的签名。
证书是一个X509实例,对应于生成签名的私钥。
签名是给出签名本身的str实例。

digest is a str instance naming the message digest type of the signature, for example b"sha256" .

版本0.11中新增。