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(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_secretstream_xchacha20poly1305_init_push — 初始化用于加密的 secretstream 上下文
sodium_crypto_secretstream_xchacha20poly1305_init_push(string $key): array
初始化用于加密的 secretstream 上下文。
key
加密密鑰。見sodium_crypto_secretstream_xchacha20poly1305_keygen())。
具有兩個(gè)字符串值的數(shù)組:
示例 #1 sodium_crypto_secretstream_xchacha20poly1305_init_push() example
<?php
function encrypt_file(string $inputFilePath, string $outputFilePath, string $key): void
{
[$state, $header] = sodium_crypto_secretstream_xchacha20poly1305_init_push($key);
$inputFile = fopen($inputFilePath, 'rb');
$outputFile = fopen($outputFilePath, 'wb');
// Write the header:
fwrite($outputFile, $header);
$inputFileSize = fstat($inputFile)['size'];
// Encrypt the file and write its contents to the output file:
for ($i = 0; $i < $inputFileSize; $i += 8175) {
$ptxt_chunk = fread($inputFile, 8175);
$ctxt_chunk = sodium_crypto_secretstream_xchacha20poly1305_push($state, $ptxt_chunk);
fwrite($outputFile, $ctxt_chunk);
}
sodium_memzero($state);
fclose($inputFile);
fclose($outputFile);
}
// sodium_crypto_secretstream_xchacha20poly1305_keygen()
$key = sodium_base642bin('MS0lzb7HC+thY6jY01pkTE/cwsQxnRq0/2L1eL4Hxn8=', SODIUM_BASE64_VARIANT_ORIGINAL);
file_put_contents('hello.txt', 'Hello world!');
encrypt_file('hello.txt', 'hello.txt.encrypted', $key);
var_dump(sodium_bin2hex(file_get_contents('hello.txt.encrypted')));
?>
以上示例的輸出類似于:
string(106) "971e33b255f0990ef3931caf761c59136efa77b434832f28ec719e3ff73f5aec38b3bba1574ab5b70a8844d8da36a668e802cfea2c"
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