PHP 创建 ECDSA 签名并使用 Golang 验证

我尝试使用 PHP 制作应用程序，为某些文档创建 ECDSA 签名，并使用 Golang 应用程序验证该签名。

我使用由 openssl 工具生成的私钥。它是 prime256v1 曲线 key 。使用命令创建:

openssl ecparam -name prime256v1 -genkey -noout -out prime256v1-key.pem

在 PHP 中，我使用 openssl_sign 函数创建签名。

我用 Golang 验证签名的所有尝试都失败了。在 Golang 中使用 crypto/ecdsa、crypto/elliptic 包。

这是我的代码。

PHP

<?php

$stringtosign = "my test string to sign";

// Privcate key was geerated with openssl tool with the command
// openssl ecparam -name prime256v1 -genkey -noout -out prime256v1-key.pem
$cert = file_get_contents('prime256v1-key.pem');

$prkey = openssl_pkey_get_private($cert);

// we sign only hashes, because Golang lib can wok with hashes only
$stringtosign = md5($stringtosign);

// we generate 64 length signature (r and s 32 bytes length)
while(1) {

    openssl_sign($stringtosign, $signature, $prkey, OPENSSL_ALGO_SHA256);

    $rlen = ord(substr($signature,3,1));

    $slen = ord(substr($signature,5+$rlen,1));

    if ($slen != 32 || $rlen != 32) {
        // try other signature if length is not 32 for both parts
        continue;
    }
    $r = substr($signature,4,$rlen);
    $s = substr($signature,6+$rlen,$slen);

    $signature = $r.$s;

    break;
}
openssl_free_key($prkey);

$signature = bin2hex($signature);

echo $signature."\n";

语言

package main

import (
    "crypto/ecdsa"
    "crypto/elliptic"
    "crypto/md5"
    "encoding/hex"
    "fmt"
    "io"
    "io/ioutil"
    "math/big"

    "crypto/x509"

    "encoding/pem"
)

func main() {
    stringtosign := "my test string to sign"

    // This is outpur of PHP app. Signature generated by PHP openssl_sign
    signature := "18d5c1d044a4a752ad91bc06499c72a590b2842b3d3b4c4b1086bfd0eea3e7eb5c06b77e15542e5ba944f3a1a613c24eabaefa4e2b2251bd8c9355bba4d14640"

    // NOTE . Error verificaion is skipped here

    // Privcate key was geerated with openssl tool with the command
    // openssl ecparam -name prime256v1 -genkey -noout -out prime256v1-key.pem
    prikeybytes, _ := ioutil.ReadFile("prime256v1-key.pem")

    p, _ := pem.Decode(prikeybytes)

    prikey, _ := x509.ParseECPrivateKey(p.Bytes)

    signatureBytes, _ := hex.DecodeString(signature)

    // make MD5 hash
    h := md5.New()
    io.WriteString(h, stringtosign)
    data := h.Sum(nil)

    // build key and verify data
    r := big.Int{}
    s := big.Int{}
    // make signature numbers
    sigLen := len(signatureBytes)
    r.SetBytes(signatureBytes[:(sigLen / 2)])
    s.SetBytes(signatureBytes[(sigLen / 2):])

    curve := elliptic.P256()

    // make public key from private key
    x := big.Int{}
    y := big.Int{}
    x.SetBytes(prikey.PublicKey.X.Bytes())
    y.SetBytes(prikey.PublicKey.Y.Bytes())
    rawPubKey := ecdsa.PublicKey{Curve: curve, X: &x, Y: &y}

    v := ecdsa.Verify(&rawPubKey, data, &r, &s)

    if v {
        fmt.Println("Success verify!")
        return
    }

    fmt.Println(fmt.Sprintf("Signatire doed not match"))

}

我做错了什么？任何人都可以向我展示 Golang 验证用 PHP 创建的签名的工作示例吗？

我尝试在 openssl_sign 中使用不同版本而不是 OPENSSL_ALGO_SHA256 。试过 OPENSSL_ALGO_SHA1、OPENSSL_ALGO_SHA512