-
Notifications
You must be signed in to change notification settings - Fork 597
/
hash.scala
65 lines (55 loc) · 2.41 KB
/
hash.scala
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
/*
* Copyright (c) 2013 Functional Streams for Scala
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package fs2
import java.security.MessageDigest
/** Provides various cryptographic hashes as pipes. */
object hash {
/** Computes an MD2 digest. */
def md2[F[_]]: Pipe[F, Byte, Byte] = digest(MessageDigest.getInstance("MD2"))
/** Computes an MD5 digest. */
def md5[F[_]]: Pipe[F, Byte, Byte] = digest(MessageDigest.getInstance("MD5"))
/** Computes a SHA-1 digest. */
def sha1[F[_]]: Pipe[F, Byte, Byte] =
digest(MessageDigest.getInstance("SHA-1"))
/** Computes a SHA-256 digest. */
def sha256[F[_]]: Pipe[F, Byte, Byte] =
digest(MessageDigest.getInstance("SHA-256"))
/** Computes a SHA-384 digest. */
def sha384[F[_]]: Pipe[F, Byte, Byte] =
digest(MessageDigest.getInstance("SHA-384"))
/** Computes a SHA-512 digest. */
def sha512[F[_]]: Pipe[F, Byte, Byte] =
digest(MessageDigest.getInstance("SHA-512"))
/** Computes the digest of the source stream, emitting the digest as a chunk
* after completion of the source stream.
*/
def digest[F[_]](digest: => MessageDigest): Pipe[F, Byte, Byte] =
in =>
Stream.suspend {
in.chunks
.fold(digest) { (d, c) =>
val bytes = c.toArraySlice
d.update(bytes.values, bytes.offset, bytes.size)
d
}
.flatMap(d => Stream.chunk(Chunk.array(d.digest())))
}
}