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version 2.104.0

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std.digest.Digest/digest - multiple declarations

Function digest

This is a convenience function to calculate a hash using the template API. Every digest passing the isDigest test can be used with this function.

DigestType!Hash digest(Hash, Range) (
  auto ref Range range
)
if (!isArray!Range && isDigestibleRange!Range);

Parameters

NameDescription
range an InputRange with ElementType ubyte, ubyte[] or ubyte[num]

Example

import std.digest.md;
import std.range : repeat;
auto testRange = repeat!ubyte(cast(ubyte)'a', 100);
auto md5 = digest!MD5(testRange);

Function digest

This overload of the digest function handles arrays.

DigestType!Hash digest(Hash, T...) (
  scope const T data
)
if (allSatisfy!(isArray, typeof(data)));

Parameters

NameDescription
data one or more arrays of any type

Example

import std.digest.crc, std.digest.md, std.digest.sha;
auto md5   = digest!MD5(  "The quick brown fox jumps over the lazy dog");
auto sha1  = digest!SHA1( "The quick brown fox jumps over the lazy dog");
auto crc32 = digest!CRC32("The quick brown fox jumps over the lazy dog");
writeln(toHexString(crc32)); // "39A34F41"

Example

import std.digest.crc;
auto crc32 = digest!CRC32("The quick ", "brown ", "fox jumps over the lazy dog");
writeln(toHexString(crc32)); // "39A34F41"

Interface Digest

This describes the OOP API. To understand when to use the template API and when to use the OOP API, see the module documentation at the top of this page.

interface Digest ;

The Digest interface is the base interface which is implemented by all digests.

Properties

NameTypeDescription
length[get] ulongThis is the length in bytes of the hash value which is returned by finish. It's also the required size of a buffer passed to finish.

Methods

NameDescription
digest (data) This is a convenience function to calculate the hash of a value using the OOP API.
finish () The finish function returns the hash value. It takes an optional buffer to copy the data into. If a buffer is passed, it must be at least length bytes big.
put (data) Use this to feed the digest with data. Also implements the isOutputRange interface for ubyte and const(ubyte)[].
reset () Resets the internal state of the digest.

Note

A Digest implementation is always an OutputRange

Example

//Using the OutputRange feature
import std.algorithm.mutation : copy;
import std.digest.md;
import std.range : repeat;

auto oneMillionRange = repeat!ubyte(cast(ubyte)'a', 1000000);
auto ctx = new MD5Digest();
copy(oneMillionRange, ctx);
writeln(ctx.finish().toHexString()); // "7707D6AE4E027C70EEA2A935C2296F21"

Example

import std.digest.crc, std.digest.md, std.digest.sha;
ubyte[] md5   = (new MD5Digest()).digest("The quick brown fox jumps over the lazy dog");
ubyte[] sha1  = (new SHA1Digest()).digest("The quick brown fox jumps over the lazy dog");
ubyte[] crc32 = (new CRC32Digest()).digest("The quick brown fox jumps over the lazy dog");
writeln(crcHexString(crc32)); // "414FA339"

Example

import std.digest.crc;
ubyte[] crc32 = (new CRC32Digest()).digest("The quick ", "brown ", "fox jumps over the lazy dog");
writeln(crcHexString(crc32)); // "414FA339"

Example

void test(Digest dig)
{
    dig.put(cast(ubyte) 0); //single ubyte
    dig.put(cast(ubyte) 0, cast(ubyte) 0); //variadic
    ubyte[10] buf;
    dig.put(buf); //buffer
}

Authors

Johannes Pfau

License

Boost License 1.0.