author | wenzelm |
Fri, 01 Apr 2022 17:06:10 +0200 | |
changeset 75393 | 87ebf5a50283 |
parent 75382 | 81673c441ce3 |
child 75394 | 42267c650205 |
permissions | -rw-r--r-- |
38473 | 1 |
/* Title: Pure/General/sha1.scala |
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Author: Makarius |
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SHA-1 message digest according to RFC 3174. |
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*/ |
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package isabelle |
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import java.io.{File => JFile, FileInputStream} |
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import java.security.MessageDigest |
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import isabelle.setup.{Build => Setup_Build} |
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object SHA1 { |
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final class Digest private[SHA1](rep: String) { |
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override def toString: String = rep |
55802
f7ceebe2f1b5
prefer abstract datatype -- in accordance to ML version;
wenzelm
parents:
54440
diff
changeset
|
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override def hashCode: Int = rep.hashCode |
f7ceebe2f1b5
prefer abstract datatype -- in accordance to ML version;
wenzelm
parents:
54440
diff
changeset
|
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override def equals(that: Any): Boolean = |
f7ceebe2f1b5
prefer abstract datatype -- in accordance to ML version;
wenzelm
parents:
54440
diff
changeset
|
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that match { |
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case other: Digest => rep == other.toString |
55802
f7ceebe2f1b5
prefer abstract datatype -- in accordance to ML version;
wenzelm
parents:
54440
diff
changeset
|
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case _ => false |
f7ceebe2f1b5
prefer abstract datatype -- in accordance to ML version;
wenzelm
parents:
54440
diff
changeset
|
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} |
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def shasum(name: String): String = rep + " " + name |
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} |
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def fake_digest(rep: String): Digest = new Digest(rep) |
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def make_digest(body: MessageDigest => Unit): Digest = { |
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val digest_body = new Setup_Build.Digest_Body { def apply(sha: MessageDigest): Unit = body(sha)} |
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new Digest(Setup_Build.make_digest(digest_body)) |
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} |
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def digest(file: JFile): Digest = |
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make_digest(sha => using(new FileInputStream(file))(stream => { |
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val buf = new Array[Byte](65536) |
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var m = 0 |
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75382
81673c441ce3
tuned: eliminted do-while for the sake of scala3;
wenzelm
parents:
75348
diff
changeset
|
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var cont = true |
81673c441ce3
tuned: eliminted do-while for the sake of scala3;
wenzelm
parents:
75348
diff
changeset
|
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while (cont) { |
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m = stream.read(buf, 0, buf.length) |
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if (m != -1) sha.update(buf, 0, m) |
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75382
81673c441ce3
tuned: eliminted do-while for the sake of scala3;
wenzelm
parents:
75348
diff
changeset
|
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cont = (m != -1) |
81673c441ce3
tuned: eliminted do-while for the sake of scala3;
wenzelm
parents:
75348
diff
changeset
|
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} |
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})) |
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62704
478b49f0d726
proper SHA1 digest as annex to heap file: Poly/ML reads precise segment length;
wenzelm
parents:
62702
diff
changeset
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def digest(path: Path): Digest = digest(path.file) |
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def digest(bytes: Array[Byte]): Digest = make_digest(_.update(bytes)) |
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def digest(bytes: Bytes): Digest = bytes.sha1_digest |
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def digest(string: String): Digest = digest(Bytes(string)) |
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def digest_set(digests: List[Digest]): Digest = |
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digest(cat_lines(digests.map(_.toString).sorted)) |
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57638
ed58e740a699
less authentic SHA1.digest: trust Scala side on blobs and avoid re-calculation via Foreign Language Interface, which might be a cause of problems;
wenzelm
parents:
55802
diff
changeset
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val digest_length: Int = digest("").toString.length |
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} |