锡兰的加密哈希 [英] Cryptographic hashing in Ceylon

问题描述

在锡兰中导入标准加密哈希（消息摘要）库（MD5，SHA1，SHA2，SHA256，SHA3等）的推荐方法是什么？

What is the recommended way to import the standard cryptographic hashing (message digest) libraries (MD5, SHA1, SHA2, SHA256, SHA3, etc.) in Ceylon?

推荐答案

SDK 。

有 Github上的Ceylon Crypto （以及3个单独的模块在畜群中 ），但它在自述文件中表示：

There is Ceylon Crypto on Github (and as 3 separate modules in Herd), but it says in the README:

请注意，IANAC（我不是密码学家），所以在某些情况下肯定存在缺陷

Note that IANAC (I am not a cryptologist), so this will surely be flawed in some security relevant way.

请勿在生产中使用，也不要以任何昂贵的方式依赖它！

如果您只想在JVM中使用它，我建议仅使用Java的加密API java.security（对于哈希函数应该足够）或javax.crypto（对于诸如密码之类的其他东西）中的s。

If you just want to use this in the JVM, I would suggest to use just Java's crypto APIs in java.security (that should be enough for the hash functions) or javax.crypto (for other stuff like ciphers).

这里是一个示例，计算SHA -256 of Hello World ：

Here is an example, calculating the SHA-256 of Hello World:

module.ceylon：

module.ceylon:

native("jvm")
module example "1.0.0" {
    import java.base "8";
}

run.ceylon：

run.ceylon:

import java.security {
    MessageDigest
}
import java.lang {
    JString=String,
    ByteArray
}

"Formats a single byte as a (two character) hexadecimal string."
String formatByte(Byte byte)
        => Integer.format(byte.unsigned, 16).padLeading(2, '0');

"Formats a Java byte array as a hexadecimal string."
String formatByteArray(ByteArray result)
        => String.sum(result.byteArray.map(formatByte));

"Calculates SHA-256('Hello World') and print it."
shared void run() {
    value message = "Hello World";
    value bytes = JString(message).getBytes("UTF-8");

    value dig = MessageDigest.getInstance("SHA-256");
    value result = dig.digest(bytes);

    value formatted = formatByteArray(result);
    print("Result: ``result.array```");
    print("Length: ``result.size``");
    print("Result in hex: ``formatted``");
}

此程序输出以下内容：

Result: { -91, -111, -90, -44, 11, -12, 32, 64, 74, 1, 23, 51, -49, -73, -79, -112, -42, 44, 101, -65, 11, -51, -93, 43, 87, -78, 119, -39, -83, -97, 20, 110 }`
Length: 32
Result in hex: A591A6D40BF420404A011733CFB7B190D62C65BF0BCDA32B57B277D9AD9F146E

我没有为此找到锡兰包装纸，但这会使它变得更好一些。

I didn't find a Ceylon wrapper for this which would make it a bit nicer, though.

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