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我正在尝试在 PHP 中生成一个 SHA256 哈希值，该哈希值将存储在数据库中并用于 C++ 程序的身份验证。
在 php 中，散列看起来像这样:
$mail = strtoupper(utf8_decode('tester@tester.com'));
$password = strtoupper(utf8_decode('password'));
$email = hash_init('sha256');
hash_update($email, $mail);
$mail = strtoupper(hash_final($email)); // In C++ the output is uppercase
$sha = hash_init('sha256');
hash_update($sha, $mail);
hash_update($sha, ':');
hash_update($sha, $password);
$pass = hash_final($sha);
或者换一种写法:
$pass = hash('sha256', strtoupper(hash('sha256', $mail)).':'.$password);
在 C++ 中，过程如下所示:
Utf8ToUpperOnlyLatin(email);
Utf8ToUpperOnlyLatin(password);
SHA256Hash email;
email.UpdateData(name);
email.Finalize();
SHA256Hash sha;
sha.UpdateData(ByteArrayToHexStr(email.GetDigest(), email.GetLength()));
sha.UpdateData(":");
sha.UpdateData(password);
sha.Finalize();
return ByteArrayToHexStr(sha.GetDigest(), sha.GetLength(), true);
和方法:
std::string ByteArrayToHexStr(uint8 const* bytes, uint32 arrayLen, bool reverse /* = false */)
{
int32 init = 0;
int32 end = arrayLen;
int8 op = 1;
if (reverse)
{
init = arrayLen - 1;
end = -1;
op = -1;
}
std::ostringstream ss;
for (int32 i = init; i != end; i += op)
{
char buffer[4];
sprintf(buffer, "%02X", bytes[i]);
ss << buffer;
}
return ss.str();
}
bool Utf8ToUpperOnlyLatin(std::string& utf8String)
{
std::wstring wstr;
if (!Utf8toWStr(utf8String, wstr))
return false;
std::transform(wstr.begin(), wstr.end(), wstr.begin(), wcharToUpperOnlyLatin);
return WStrToUtf8(wstr, utf8String);
}
SHA256Hash::SHA256Hash()
{
SHA256_Init(&mC);
memset(mDigest, 0, SHA256_DIGEST_LENGTH * sizeof(uint8));
}
void SHA256Hash::UpdateData(const uint8 *dta, int len)
{
SHA256_Update(&mC, dta, len);
}
void SHA256Hash::UpdateData(const std::string &str)
{
UpdateData((uint8 const*)str.c_str(), str.length());
}
void SHA256Hash::Initialize()
{
SHA256_Init(&mC);
}
void SHA256Hash::Finalize(void)
{
SHA256_Final(mDigest, &mC);
}
使用这两种方法的输出是:
C++: 09FEBAB417CF2FA563AC89963519CCAC53D5F556F8BF20D7EEB818A0584A514E
PHP: 4e514a58a018b8eed720bff856f5d553accc19359689ac63a52fcf17b4bafe09
如果我要交换
$mail = strtoupper(hash_final($email)); // In C++ the output is uppercase
对于
$mail = hash_final($email);
PHP 输出将是
89ba15a964331258bcc763f44473c492854bf9c2694cc2306da64ccef8ffeab2
为什么我似乎无法让 PHP 和 C++ 产生相同的结果？
谢谢。