无法使用AES-256-CBC中的pgcrypto进行解密，但AES-128-CBC是可以的

我有问题解密pgcrypto中以前在PHP应用程序中加密的数据 .

I tried 3 types of encryption: 1）mcrypt - RIJNDAEL 128 CBC
2）mcrypt - RIJNDAEL 256 CBC
3）openssl_encrypt - aes-256-cbc

所有内容都在PHP中加密解密，但是在pgcrypto中我可以使用相同的密钥解密而且只有1）mcrypt - RIJNDAEL 128 CBC

这是PHP部分的示例代码：

<?php
function d ($data, $key, $mode) {
    $data = @base64_decode($data);
    $pad = $mode == MCRYPT_RIJNDAEL_256 ? 32 : 16;
    $iv = mb_substr($data, 0, $pad, "8bit");
    $data = mb_substr($data, $pad, mb_strlen($data, "8bit"), "8bit");

    if ($data === null || $data === "") {
        return $data;
    }

    if ($mode == MCRYPT_RIJNDAEL_128 OR $mode == MCRYPT_RIJNDAEL_256) {
        $data = mcrypt_decrypt($mode, $key, $data, MCRYPT_MODE_CBC, $iv);
    } else {
        $data = openssl_decrypt($data, "aes-256-cbc", $key, 0, $iv);
    }

    if ($data === false) {
        throw new Exception("Unable to decrypt data");
    }

    $padding = ord($data[mb_strlen($data, "8bit") - 1]);
    $data = mb_substr($data, 0, mb_strlen($data, "8bit") - $padding, "8bit");

    return $data;
}
function e ($data, $key, $mode) {
    $pad = $mode == MCRYPT_RIJNDAEL_256 ? 32 : 16;
    $iv = openssl_random_pseudo_bytes($pad);

    $padding = 16 - (strlen($data) % $pad);
    $data .= str_repeat(chr($padding), $padding);

    if ($mode == MCRYPT_RIJNDAEL_128 OR $mode == MCRYPT_RIJNDAEL_256) {
        $data = mcrypt_encrypt($mode, $key, $data, MCRYPT_MODE_CBC, $iv);
    } else {
        $data = openssl_encrypt($data, "aes-256-cbc", $key, 0, $iv );
    }

    if ($data === false) {
        throw new Exception("Unable to encrypt data");
    }

    return base64_encode($iv . $data);
}

$mode1 = MCRYPT_RIJNDAEL_128;
$key1 = "67pma7BQL01cqb6Nlil2T1436lLXv8Ln";

$key2 = "85f2669023b98a62d1312af75994ddf1";
$mode2 = MCRYPT_RIJNDAEL_256;

$key3 = "85f2669023b98a62d1312af75994ddf1";
$mode3 = "aes-256-cbc";

$data = "test";

$e1 = e($data, $key1, $mode1);
$e2 = e($data, $key2, $mode2);
$e3 = e($data, $key3, $mode3);

$d1 = d($e1, $key1, $mode1); //
$d2 = d($e2, $key2, $mode2); //
$d3 = d($e3, $key3, $mode3); //

//for ($i=1; $i < 4; $i++) {
//   ${"e" . $i} = e($data, ${"key" . $i}, ${"mode" . $i});
//
//    ${"d" . $i} = d(${"e" . $i}, ${"key" . $i}, ${"mode" . $i});
//}

Results and data used to code:

1) mcrypt - RIJNDAEL 128 CBC

• key = "67pma7BQL01cqb6Nlil2T1436lLXv8Ln"

• init vector base64 = "q5gXIfW6maT4zx4tgJQImg=="

• 加密字符串base64 = "q5gXIfW6maT4zx4tgJQImtwJgEVK66mTcRPdilkEiHY="

• 解密字符串base64 = "dGVzdA=="

2) mcrypt - RIJNDAEL 256 CBC

• key = "85f2669023b98a62d1312af75994ddf1"

• init vector base64 = "2EmtyH++cQA5X5mmtY+vpl5FkVwELS9ExrYnFjGGco0="

• 加密字符串base64 = "2EmtyH++cQA5X5mmtY+vpl5FkVwELS9ExrYnFjGGco3B29CC5DpfWs1YAfh8WuY9f0/6OPC1B4sidSV5TojJ1g=="

• 解密字符串base64 = "dGVzdAwMDAwMDAwMDAwMDAAAAAAAAAAAAAAAAAAAAAA="

3) openssl_encrypt - aes-256-cbc

• key = "85f2669023b98a62d1312af75994ddf1"

• init vector base64 = "tOi+xXZf6MyPDpQzPZAI6Q=="

• 加密字符串base64 = "tOi+xXZf6MyPDpQzPZAI6XJQYmwyNUVzKzdaVnNickc5dEg5MUd1anpBYlpLeW9SQjhpZ29yQzRpWFk9"

• 解密字符串base64 = "dGVzdA=="

这里我是如何尝试使用相同的密钥和IV在Postgres中解密此数据 .

SELECT
  -- mcrypt aes 128
  decrypt_iv(
      decode('q5gXIfW6maT4zx4tgJQImtwJgEVK66mTcRPdilkEiHY=', 'base64'),
      '67pma7BQL01cqb6Nlil2T1436lLXv8Ln',
      decode('q5gXIfW6maT4zx4tgJQImg==', 'base64'),
      'aes-cbc'
  ),

  -- mcrypt aes 256
  decrypt_iv(
      decode('2EmtyH++cQA5X5mmtY+vpl5FkVwELS9ExrYnFjGGco3B29CC5DpfWs1YAfh8WuY9f0/6OPC1B4sidSV5TojJ1g==', 'base64'),
      '85f2669023b98a62d1312af75994ddf1',
      decode('2EmtyH++cQA5X5mmtY+vpl5FkVwELS9ExrYnFjGGco0=', 'base64'),
      'aes-cbc'
  ),
--     -- openssl aes 256
-- decrypt_iv(
--   decode('tOi+xXZf6MyPDpQzPZAI6XJQYmwyNUVzKzdaVnNickc5dEg5MUd1anpBYlpLeW9SQjhpZ29yQzRpWFk9', 'base64'),
--   '85f2669023b98a62d1312af75994ddf1',
--   decode('tOi+xXZf6MyPDpQzPZAI6Q==', 'base64'),
--   'aes-cbc'
-- ),
    -- pgcrypto same values as mcrypt aes 128 encrypt then decrypt
  decrypt_iv(
    encrypt_iv(
        'test',
        '67pma7BQL01cqb6Nlil2T1436lLXv8Ln',
        decode('q5gXIfW6maT4zx4tgJQImg==', 'base64'),
        'aes-cbc'),
    '67pma7BQL01cqb6Nlil2T1436lLXv8Ln',
    decode('q5gXIfW6maT4zx4tgJQImg==', 'base64'),
    'aes-cbc'
    )

As you see all 3 decrypted OK in PHP. In Postgres only first (mcrypt aes128cbc) decrypted OK - 前16个字节仍然是IV，但我可以删除它们并转换为文本 . 另外两个（mcrypte AES256CBC和openssl256cbc）甚至看起来都没有被解密 . 我用openssl256cbc评论了块，因为它给了我"[39000] ERROR: decrypt_iv error: Data not a multiple of block size"错误 .

任何帮助将不胜感激 .