在 php 中验证来自 java 的 rsa 签名
几天以来,我遇到了一个我自己无法解决的问题:
在JavaCard上,我生成了一个RSA密钥对(长度:1024)和一个签名(模式:ALG_RSA_MD5_PKCS1)。 现在我必须验证 php.ini 中的签名。
从我的 JavaCard 中,我得到了十六进制的指数、模数和签名:
$mod = '951ADDA04637190B6202BB52787D3C19160A383C80C2E7242D0A7850FDD80C1CD1CCCF1395F8CA0B20270E3BC6C86F78232D65D148258BEFD0884563C60AB2C327506FB4FA0095CF0B1C527D942155731451F790EC0A227D38613C9EBFB2E04A657B3BA5456B35F71E92E14B7E1CB38DB6572559BFCA3B0AD8AA061D48F68931';
$exp = '010001';
$sign ='75867D42BDE6DF1066D4AF69418FCDD4B0F19173141128DFEBC64AF6C014CB92D38F4824E52BB064A610E07C7783AE57AE993A792F15208FB199CB1F45B64623AACB7FBA07AD89513C8DBA893C9FA6939857AA2CA53AAD99D9A9C1C32DF4E2769FCACB72E2C2C495727D368D953A911D32E79E230751202714DD15C0B6A34782';
$plaintext = '01020304';
Java 中的验证没有问题。但知道我必须验证 PHP 中的签名(我采用 phpseclib)。
在 PHP 中,我使用 CRYPT_RSA_PUBLIC_FORMAT_RAW 生成我的 public_key:
$rsa = new Crypt_RSA();
$pk = array(
'e' => new Math_BigInteger($exp, 16),
'n' => new Math_BigInteger($mod, 16)
);
$rsa->loadKey($pk, CRYPT_RSA_PUBLIC_FORMAT_RAW);
$rsa->setSignatureMode(CRYPT_RSA_SIGNATURE_PKCS1);
echo $rsa->verify($plaintext, $sign) ? 'verified' : 'unverified';
知道的问题是在函数 verify 中设置正确的值。 如果我只是将签名设置为十六进制,我会收到通知:
Invalid signature: length = 256, k = 128 in C:\xampp\php\PEAR\Crypt\RSA.php on line 2175
所以我必须自定义签名的长度:
$sign_bigInteger = new Math_BigInteger($sign, 16);
$sign_bytes = $sign_bigInteger->toBytes();
echo $rsa->verify($plaintext, $sign_bytes) ? 'verified' : 'unverified';
但验证是错误的。
我在 RSA.php (_rsassa_pkcs1_v1_5_verify) 中得到验证函数的输出,其中将明文与签名进行比较:
//sign
"ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ0 0*†H†÷ ÖÀZ!Q*y¡ßë*&/"
//plaintext
"ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ0!0 +•q£îê“O•äQ».åüÓSœÝ["
我不太明白 RSA.php 类中发生了什么。 谁能帮助我并说出我做错了什么?
编辑:
现在我尝试转换我的十六进制字符串。
$plaintext_bin = pack("H*", $plaintext);
$sign_bin = pack("H*", $sign);
我认为我的公钥是正确生成的,因此我只需更改验证的输入:
$rsa->verify($plaintext_bin, $sign_bin) ? 'verified' : 'unverified';
输出:
em: string(128) "ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ0 0*†H†÷ ÖÀZ!Q*y¡ßë*&/"
em2: string(128) "ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ0!0 +ÚÚÿMG‡ã31G ,;D>7o"
仍然不一样。
编辑:
我解决了我的问题。我忘记设置哈希值:
$rsa1->setHash('md5');
现在可以了!
谢谢格雷格。
Since a few days I've got a problem that I can't solve on my own:
On a JavaCard I generate a RSA KeyPair (length: 1024) and a signature (Mode:ALG_RSA_MD5_PKCS1).
Now I have to verify the signature in php.
From my JavaCard I get the exponent, modulus and the signature in hexadecimal:
$mod = '951ADDA04637190B6202BB52787D3C19160A383C80C2E7242D0A7850FDD80C1CD1CCCF1395F8CA0B20270E3BC6C86F78232D65D148258BEFD0884563C60AB2C327506FB4FA0095CF0B1C527D942155731451F790EC0A227D38613C9EBFB2E04A657B3BA5456B35F71E92E14B7E1CB38DB6572559BFCA3B0AD8AA061D48F68931';
$exp = '010001';
$sign ='75867D42BDE6DF1066D4AF69418FCDD4B0F19173141128DFEBC64AF6C014CB92D38F4824E52BB064A610E07C7783AE57AE993A792F15208FB199CB1F45B64623AACB7FBA07AD89513C8DBA893C9FA6939857AA2CA53AAD99D9A9C1C32DF4E2769FCACB72E2C2C495727D368D953A911D32E79E230751202714DD15C0B6A34782';
$plaintext = '01020304';
A Verification in Java is no problem. But know I have to verify the signature in PHP (I take phpseclib).
In PHP I generate my public_key with CRYPT_RSA_PUBLIC_FORMAT_RAW:
$rsa = new Crypt_RSA();
$pk = array(
'e' => new Math_BigInteger($exp, 16),
'n' => new Math_BigInteger($mod, 16)
);
$rsa->loadKey($pk, CRYPT_RSA_PUBLIC_FORMAT_RAW);
$rsa->setSignatureMode(CRYPT_RSA_SIGNATURE_PKCS1);
echo $rsa->verify($plaintext, $sign) ? 'verified' : 'unverified';
The problem know is to set the correct values in the function verify.
If I just set my signature in hexadecimal I get the notice:
Invalid signature: length = 256, k = 128 in C:\xampp\php\PEAR\Crypt\RSA.php on line 2175
So I have to customize the length of my signature:
$sign_bigInteger = new Math_BigInteger($sign, 16);
$sign_bytes = $sign_bigInteger->toBytes();
echo $rsa->verify($plaintext, $sign_bytes) ? 'verified' : 'unverified';
But the verification is false.
I get the output of the verification function in RSA.php (_rsassa_pkcs1_v1_5_verify) where plaintext is compared with the signature :
//sign
"ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ0 0*†H†÷ ÖÀZ!Q*y¡ßë*&/"
//plaintext
"ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ0!0 +•q£îê“O•äQ».åüÓSœÝ["
I don't really understand whats happening in the Class RSA.php.
Can anyone help me and say what I do wrong?
EDIT:
Now I tried to convert my hexString.
$plaintext_bin = pack("H*", $plaintext);
$sign_bin = pack("H*", $sign);
I think that my public key is correct generated, so I just change the input of my verify:
$rsa->verify($plaintext_bin, $sign_bin) ? 'verified' : 'unverified';
Output:
em: string(128) "ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ0 0*†H†÷ ÖÀZ!Q*y¡ßë*&/"
em2: string(128) "ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ0!0 +ÚÚÿMG‡ã31G ,;D>7o"
It's still not the same.
EDIT:
I fixed my problem. I forgot to set the Hash:
$rsa1->setHash('md5');
Now it works!
Thank you GregS.
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您的所有值都是十六进制字符串。只需使用
hex2bin()
或pack("H*", $hex_string);
转换它们All your values are hex strings. Just convert them using
hex2bin()
orpack("H*", $hex_string);