使用openssl进行phpseclib RSA解密

Question

I used phpseclib for encryption, have some problem with openssl decrypt

//generate keys
extract($rsa->createKey(1024));
file_put_contents("public.pem",$publickey);
file_put_contents("private.pem",$privatekey);

encrypt text

    $rsa->loadKey($public_key); // public key
    $plaintext = '...';
    $ciphertext = $rsa->encrypt($plaintext);
    file_put_contents("ciphertext.txt",$ciphertext);

So in linux i'm decrypting :

xxd -p ciphertext.txt | tr -d '
' 

And finally like the following command

openssl rsautl -decrypt -inkey private.pem

get this error :

error:0407106B:rsa routines:RSA_padding_check_PKCS1_type_2:block type is not 02:rsa_pk1.c:190:
error:04065072:rsa routines:RSA_EAY_PRIVATE_DECRYPT:padding check failed:rsa_eay.c:674:

I am doing these settings for phpseclib :

define('CRYPT_RSA_PKCS15_COMPAT', true);

and now get this error on openssl:

error:04065084:rsa routines:RSA_EAY_PRIVATE_DECRYPT:data too large for modulus:rsa_eay.c:590:

public key :

-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDGCglgIcCG5a8xlZHEDRtQQTc4
kfxENNBtVN8bE4errA06mJ10WavP2Hg+k11NQip71IQPfIF9jlk1CsqT5ZHXOrOq
RmufHFLa3fiuPvFiMB1NjK4F28Gk4LwyZrfTWc2V6S0xpL5XkFeWRW6I69xckOXj
GqkC5dsWv/IlvPeVbwIDAQAB
-----END PUBLIC KEY-----

private key :

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

Answer 1

A Few Comments.

1. You may find this page helpful:

   http://phpseclib.sourceforge.net/interop.html#rsaencpkcs1,p1phpseclib,p2openssl

2. I had suggested in my earlier answer that you do $rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1);. Your latest edited post still does not have you doing that:

   $rsa->loadKey($public_key); // public key
   $plaintext = '...';
   $ciphertext = $rsa->encrypt($plaintext);
   file_put_contents("ciphertext.txt",$ciphertext);
   

   Doing define('CRYPT_RSA_PKCS15_COMPAT', true); only does anything if you're in PKCS1 mode and you're not.

3. You're post says you're doing openssl rsautl -decrypt -inkey private.pem. idk how the whole xxd command is supposed to work but normally, with OpenSSL, you need to specify an input file by doing -in ciphertext.txt, which you're not doing.

Working Code

Using your public and private key this worked for me:

<?php
include('Crypt/RSA.php');

$rsa = new Crypt_RSA();

$public_key = '-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDGCglgIcCG5a8xlZHEDRtQQTc4
kfxENNBtVN8bE4errA06mJ10WavP2Hg+k11NQip71IQPfIF9jlk1CsqT5ZHXOrOq
RmufHFLa3fiuPvFiMB1NjK4F28Gk4LwyZrfTWc2V6S0xpL5XkFeWRW6I69xckOXj
GqkC5dsWv/IlvPeVbwIDAQAB
-----END PUBLIC KEY-----';
$rsa->loadKey($public_key); // public key
$rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1);
$plaintext = '...';
$ciphertext = $rsa->encrypt($plaintext);
file_put_contents("ciphertext.txt",$ciphertext);

...and on the CLI:

openssl rsautl -decrypt -inkey private.pem -in ciphertext.txt

Here's the output I got:

...