OpenJDK 12 、PHP 7.3 测试交叉验证都通过。

// 原文

$data = '二〇二〇年四月四日 01:43:37';

// 私钥

$private = <<

-----BEGIN RSA PRIVATE KEY-----

MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCow6pxwoAIFXWs

ZY3QMoUmB4uAYk0cAROITeCLROpzwRDtcXRDJ3TP/LrwgviTlmPD/VAtxa01eW7+

xmCUCY7IuaG9UmRAF7q8RXQ+T74ce8zSF6KIWRbWv+DOq860zCmaa9zr5DBHgf5X

mwC6/SqBhQlE7WxrecNOJC7Qx5o1V/LhZ5hAP5nxg6zpoSvTMZitiQSRVuenqotP

t0iD8b4TRcX7siNGIE2mo7xoCnjJ7Vv3iuLi6kczfpH5WoB/k54hZncZPc/wN4m4

SWY4f1uoDr2XtkCDNAODuhu7LMz1Yvk7yRsyX7NwopmLHzhtjdSOSPnJszTQUkNa

+8DCSxJhAgMBAAECggEAbxJgUoDdfPSKvw0Tmcw2P8JFeRi5gU3gChyfRWn1GHwf

5PZ/u1bzlZPTgUnhylj3jl1g8M8iYYhrmfj8RVJJDCjIn27jlh9IAnN/vycCi4Kb

Wka97RkdY/djQQJoiCu60exduU80y0tuF0Bn6amH2Tiy0g+lBNNdzEcaHMTR5HrN

PS7wRCnU0i3aIZbGSfFT6EHQES5FE2q3hTrySrv4cqR2Jnk+UJPYMyl7/cgc/X7K

1cHCVpHmahhgxzXK2KBoOs2fmLcpHvlxu8roJm2OWxUDAoZFKtP5W6j0lbIl3afb

OJFjpH1SLOP55lAMGAU65Ili68yVWWQuJi+h23dDcQKBgQDR4ZKK8AvsWHSHIcuh

6/bBkKSXCLatZhqXE5sjaQy1syzXtLQ1JDYilDgorpvmqOfwClScF/eQLTYO+qM5

zQEfZpMjciLiywAvRCRFKlUSOE4jivfsMZLsZ617QSUMrxXRKlUXNMOEDP/wE5p+

LiaxORGWMuKJYavfabnmeEnH3QKBgQDN2SblEQok5+Q6kx5twrIJUhKeexLwtDHV

ybObO95iYMTCjbfxxA48w7jmJl1cPADqNINeDPOHNIl16RQ4UHH6MO32FVoHlei9

AtVqKxCpBiJvl7T7vg0n8Zr3uCANVmexdsSnq6DbqTrXCPufo9vmfkScGjK3lmgA

xqyJUkouVQKBgGteobBQQ1lCm0JySJFqfI7jpz/Y5lNo05uMHSaNXEIsCnnDaRly

j/s6pkwxn3Ht4NHNByHfpPduGaSqFgzA0p00xXsxraUmQs7rZj63/FNY2KiYNGLx

rX8hPv+6APEvNNMPe/5mMMuCNwCjlrqMc6DgWB3lpDyx6dJebQr5aI1FAoGAJLrw

s8L8mmU+Vi1WKqOo/PzGEb1IPecJVWpuP+7I2akGsuhywBMJr1IFNhv2YLTcPO4t

2qRY9/Ep7f4u+3VvQQNmEpjwvZXEN6W/yvfwOxi7IEpjot/gnRYBXt5d6cNXMVVN

9dUsGMXzl9ckfvHQFSrGt0v9bMDLwgexVbd3QRkCgYEAzTVg+3hY9lt1cdrwklOs

Yfw3K33lq+Ip8RZ7WjeuO6W2Fuvh/MHEBxnwcPEZSKIhOpOV2VdYQo80uqinE4il

4IQqhf2qFOshGHrOspDbJUgtuVH5JkmQDeh5yT5+Upd3FXj8sOVjzbH2sz//o9sU

jOYUhzLO1jeLIc6l0wnzRfE=

-----END RSA PRIVATE KEY-----

PRI;

// 公钥

$public = <<

-----BEGIN PUBLIC KEY-----

MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqMOqccKACBV1rGWN0DKF

JgeLgGJNHAETiE3gi0Tqc8EQ7XF0Qyd0z/y68IL4k5Zjw/1QLcWtNXlu/sZglAmO

yLmhvVJkQBe6vEV0Pk++HHvM0heiiFkW1r/gzqvOtMwpmmvc6+QwR4H+V5sAuv0q

gYUJRO1sa3nDTiQu0MeaNVfy4WeYQD+Z8YOs6aEr0zGYrYkEkVbnp6qLT7dIg/G+

E0XF+7IjRiBNpqO8aAp4ye1b94ri4upHM36R+VqAf5OeIWZ3GT3P8DeJuElmOH9b

qA69l7ZAgzQDg7obuyzM9WL5O8kbMl+zcKKZix84bY3Ujkj5ybM00FJDWvvAwksS

YQIDAQAB

-----END PUBLIC KEY-----

PUB;

// JAVA 生成的签名

// 验证

//$encrypt = 'flCNTyn6pydpBy7zPuJ6zaIpVMz47RdhmqsFsdRgHZF79H78R9Hhkw5sf3T86f6ESDSCD+3Fj/JSHZE9+hXyUt4i6NH41MKBVLr8pgZBpkwExPcBXa13vSa2dFniDbu2ZHiKRJGZWtGTmQPOHAxOqfnNxEv0StP8Hit8Plva/ug7tdGCi4j6sjhTWpB2vUFI2tzSnbeOQWJ+dfa6zrwbIC8EHBYltUiRmMry3H7YYNI+rt16HvS7TrbVWPi90ClMdj64CEahlS9TLpzErMUuJcyubs12QLUhHKL9IMvqNMa8SF8eztp3ZmWTtC1YxFfSHhQBUiLV/bA+iJ7CYROwIw==';

//$verify = openssl_verify($data, base64_decode($encrypt), $public, OPENSSL_ALGO_SHA256);

//var_dump($verify);

//die;

//

生成签名去JAVA验证

//$isOK = openssl_sign($data, $sign, $private, OPENSSL_ALGO_SHA256);

//if ($isOK) {

// echo base64_encode($sign);

//}

package com.company;

import java.nio.charset.StandardCharsets;

import java.security.*;

import java.security.spec.InvalidKeySpecException;

import java.security.spec.PKCS8EncodedKeySpec;

import java.security.spec.X509EncodedKeySpec;

import java.util.Base64;

public class Main {

public static void main(String[] args) throws Exception {

String origin = "二〇二〇年四月四日 01:43:37";

String encrypt = "flCNTyn6pydpBy7zPuJ6zaIpVMz47RdhmqsFsdRgHZF79H78R9Hhkw5sf3T86f6ESDSCD+3Fj/JSHZE9+hXyUt4i6NH41MKBVLr8pgZBpkwExPcBXa13vSa2dFniDbu2ZHiKRJGZWtGTmQPOHAxOqfnNxEv0StP8Hit8Plva/ug7tdGCi4j6sjhTWpB2vUFI2tzSnbeOQWJ+dfa6zrwbIC8EHBYltUiRmMry3H7YYNI+rt16HvS7TrbVWPi90ClMdj64CEahlS9TLpzErMUuJcyubs12QLUhHKL9IMvqNMa8SF8eztp3ZmWTtC1YxFfSHhQBUiLV/bA+iJ7CYROwIw==";

if (verify(getPublic(), origin, encrypt)) {

System.out.println("验证通过!");

}

//

// System.out.println(signSHA256RSA(origin, getPrivate()));

}

private static String signSHA256RSA(String input, String strPk) throws Exception {

byte[] b1 = Base64.getDecoder().decode(strPk);

PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(b1);

KeyFactory kf = KeyFactory.getInstance("RSA");

Signature privateSignature = Signature.getInstance("SHA256withRSA");

privateSignature.initSign(kf.generatePrivate(spec));

privateSignature.update(input.getBytes(StandardCharsets.UTF_8));

byte[] s = privateSignature.sign();

return Base64.getEncoder().encodeToString(s);

}

private static boolean verify(String publicKeyStr, String originStr, String encrypted) throws NoSuchAlgorithmException, InvalidKeySpecException, InvalidKeyException, SignatureException {

byte[] decode = Base64.getDecoder().decode(encrypted);

byte[] data = originStr.getBytes();

X509EncodedKeySpec keySpec = new X509EncodedKeySpec(Base64.getDecoder().decode(publicKeyStr));

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

PublicKey publicKey = keyFactory.generatePublic(keySpec);

Signature sha256withRSA = Signature.getInstance("SHA256withRSA");

sha256withRSA.initVerify(publicKey);

sha256withRSA.update(data);

return sha256withRSA.verify(decode);

}

public static String getPrivate() {

return "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";

}

public static String getPublic() {

return "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqMOqccKACBV1rGWN0DKFJgeLgGJNHAETiE3gi0Tqc8EQ7XF0Qyd0z/y68IL4k5Zjw/1QLcWtNXlu/sZglAmOyLmhvVJkQBe6vEV0Pk++HHvM0heiiFkW1r/gzqvOtMwpmmvc6+QwR4H+V5sAuv0qgYUJRO1sa3nDTiQu0MeaNVfy4WeYQD+Z8YOs6aEr0zGYrYkEkVbnp6qLT7dIg/G+E0XF+7IjRiBNpqO8aAp4ye1b94ri4upHM36R+VqAf5OeIWZ3GT3P8DeJuElmOH9bqA69l7ZAgzQDg7obuyzM9WL5O8kbMl+zcKKZix84bY3Ujkj5ybM00FJDWvvAwksSYQIDAQAB";

}

}