在PHP中从公钥哈希到比特币地址

发布时间：2020-12-13 22:05:48 所属栏目：PHP教程来源：网络整理

导读：我试图遵循使用 PHP将65字节公钥转换为比特币地址所需的指令.说明非常明确.任何人都可以帮助我在PHP中实现这一点的实用性？说明是 1 – 获取用它生成的相应公钥(65字节,1字节0x04,32坐标对应X坐标,32字节对应Y坐标) 0450863AD64A87AE8A2FE83C1AF1A8403CB53F

我试图遵循使用 PHP将65字节公钥转换为比特币地址所需的指令.说明非常明确.任何人都可以帮助我在PHP中实现这一点的实用性？

说明是

1 – 获取用它生成的相应公钥(65字节,1字节0x04,32坐标对应X坐标,32字节对应Y坐标)

0450863AD64A87AE8A2FE83C1AF1A8403CB53F53E486D8511DAD8A04887E5B23522CD470243453A299FA9E77237716103ABC11A1DF38855ED6F2EE187E9C582BA6

2 – 对公钥执行SHA-256哈希处理

600FFE422B4E00731A59557A5CCA46CC183944191006324A447BDB2D98D4B408

3 – 对SHA-256的结果执行RIPEMD-160散列

010966776006953D5567439E5E39F86A0D273BEE

4 – 在RIPEMD-160散列前添加版本字节(主网络为0x00)

00010966776006953D5567439E5E39F86A0D273BEE

5 – 对扩展的RIPEMD-160结果执行SHA-256哈希

445C7A8007A93D8733188288BB320A8FE2DEBD2AE1B47F0F50BC10BAE845C094

6 – 对先前SHA-256哈希的结果执行SHA-256哈希

D61967F63C7DD183914A4AE452C9F6AD5D462CE3D277798075B107615C1A8A30

7 – 获取第二个SHA-256哈希的前4个字节.这是地址校验和

D61967F6

8 – 在点4的扩展RIPEMD-160哈希结尾处从点7添加4个校验和字节.这是25字节的二进制比特币地址.

00010966776006953D5567439E5E39F86A0D273BEED61967F6

9 – 使用Base58Check编码将结果从字节字符串转换为base58字符串.这是最常用的比特币地址格式

16UwLL9Risc3QfPqBUvKofHmBQ7wMtjvM

我的第一次尝试是

// step 1

$publickey='0450863AD64A87AE8A2FE83C1AF1A8403CB53F53E486D8511DAD8A04887E5B23522CD470243453A299FA9E77237716103ABC11A1DF38855ED6F2EE187E9C582BA6';
$step1=$publickey;

echo "step1 ".$publickey."<br>";

// step 2

$step2=hash("sha256",$step1);
echo "step2 ".$step2."<br>";

// step 3

$step3=hash('ripemd160',$step2);
echo "step3 ".$step3."<br>";

// step 4

$step4="00".$step3;
echo "step4 ".$step4."<br>";

// step 5

$step5=hash("sha256",$step4);
echo "step5 ".$step5."<br>";

// step 6

$step6=hash("sha256",$step5);
echo "step6 ".$step6."<br>";

// step 7

$checksum=substr($step6,8);
echo "step7 ".$checksum."<br>";

// step 8

$step8=$step4.$checksum;
echo "step8 ".$step8."<br>";

//step 9

$step9=base58_encode($step8);
echo "step9 ".$step9."<br><br>";

这在第一步失败了.任何帮助赞赏.

这是输出

step1 0450863AD64A87AE8A2FE83C1AF1A8403CB53F53E486D8511DAD8A04887E5B23522CD470243453A299FA9E77237716103ABC11A1DF38855ED6F2EE187E9C582BA6
step2 32511e82d56dcea68eb774094e25bab0f8bdd9bc1eca1ceeda38c7a43aceddce
step3 7528c664cdc34c5ce809778eb688d32f89a538c0
step4 007528c664cdc34c5ce809778eb688d32f89a538c0
step5 86e76f4ff0bf0387339ac70a552e0fed615f7def34cc4809df1429e243f6c1fa
step6 b885b7225b370e7ff27ee0afb4f89b52b8675d5dc342d63de3abe7535f86cadb
step7 b885b722
step8 007528c664cdc34c5ce809778eb688d32f89a538c0b885b722
step9 1

Base58的功能是

function base58_encode($input)
{
    $alphabet =     '123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ';
    $base_count = strval(strlen($alphabet));
    $encoded = '';
    while (floatval($input) >= floatval($base_count))
    {
        $div = bcdiv($input,$base_count);
        $mod = bcmod($input,$base_count);
        $encoded = substr($alphabet,intval($mod),1) . $encoded;
        $input = $div;
    }
    if (floatval($input) > 0)
    {
        $encoded = substr($alphabet,intval($input),1) . $encoded;
    }
    return($encoded);
}

解决方法

感谢Sammitch发现语法并提供基本转换,下面的解决方案.

<?php

// step 1

$publickey='0450863AD64A87AE8A2FE83C1AF1A8403CB53F53E486D8511DAD8A04887E5B23522CD470243453A299FA9E77237716103ABC11A1DF38855ED6F2EE187E9C582BA6';

$step1=hexStringToByteString($publickey);

echo "step1 ".$publickey."<br>";

// step 2

$step2=hash("sha256",hexStringToByteString($step2));
echo "step3 ".$step3."<br>";

// step 4

$step4="00".$step3;
echo "step4 ".$step4."<br>";

// step 5

$step5=hash("sha256",hexStringToByteString($step4));
echo "step5 ".$step5."<br>";

// step 6

$step6=hash("sha256",hexStringToByteString($step5));
echo "step6 ".$step6."<br>";

// step 7

$checksum=substr($step6,8);
echo "step7 ".$checksum."<br>";

// step 8

$step8=$step4.$checksum;
echo "step8 ".$step8."<br>";

// step 9
// base conversion is from hex to base58 via decimal. 
// Leading hex zero converts to 1 in base58 but it is dropped
// in the intermediate decimal stage.  Simply added back manually.

$step9="1".bc_base58_encode(bc_hexdec($step8));
echo "step9 ".$step9."<br><br>";

?>

hash需要字节字符串而不是十六进制字符串. hexStringToByteString是

function hexStringToByteString($hexString){
    $len=strlen($hexString);

    $byteString="";
    for ($i=0;$i<$len;$i=$i+2){
        $charnum=hexdec(substr($hexString,$i,2));
        $byteString.=chr($charnum);
    }

return $byteString;
}

基本转换(感谢Sammitch – 修改为使用比特币base58)

// BCmath version for huge numbers
function bc_arb_encode($num,$basestr) {
    if( ! function_exists('bcadd') ) {
        Throw new Exception('You need the BCmath extension.');
    }

    $base = strlen($basestr);
    $rep = '';

    while( true ){
        if( strlen($num) < 2 ) {
            if( intval($num) <= 0 ) {
                break;
            }
        }
        $rem = bcmod($num,$base);
        $rep = $basestr[intval($rem)] . $rep;
        $num = bcdiv(bcsub($num,$rem),$base);
    }
    return $rep;
}

function bc_arb_decode($num,$basestr) {
    if( ! function_exists('bcadd') ) {
        Throw new Exception('You need the BCmath extension.');
    }

    $base = strlen($basestr);
    $dec = '0';

    $num_arr = str_split((string)$num);
    $cnt = strlen($num);
    for($i=0; $i < $cnt; $i++) {
        $pos = strpos($basestr,$num_arr[$i]);
        if( $pos === false ) {
            Throw new Exception(sprintf('Unknown character %s at offset %d',$num_arr[$i],$i));
        }
        $dec = bcadd(bcmul($dec,$base),$pos);
    }
    return $dec;
}


// base 58 alias
function bc_base58_encode($num) {   
    return bc_arb_encode($num,'123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz');
}
function bc_base58_decode($num) {
    return bc_arb_decode($num,'123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz');
}

//hexdec with BCmath
function bc_hexdec($num) {
    return bc_arb_decode(strtolower($num),'0123456789abcdef');
}
function bc_dechex($num) {
    return bc_arb_encode($num,'0123456789abcdef');
}

最终输出

step1 0450863AD64A87AE8A2FE83C1AF1A8403CB53F53E486D8511DAD8A04887E5B23522CD470243453A299FA9E77237716103ABC11A1DF38855ED6F2EE187E9C582BA6
step2 600ffe422b4e00731a59557a5cca46cc183944191006324a447bdb2d98d4b408
step3 010966776006953d5567439e5e39f86a0d273bee
step4 00010966776006953d5567439e5e39f86a0d273bee
step5 445c7a8007a93d8733188288bb320a8fe2debd2ae1b47f0f50bc10bae845c094
step6 d61967f63c7dd183914a4ae452c9f6ad5d462ce3d277798075b107615c1a8a30
step7 d61967f6
step8 00010966776006953d5567439e5e39f86a0d273beed61967f6
step9 16UwLL9Risc3QfPqBUvKofHmBQ7wMtjvM

（编辑：李大同）

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