author | wenzelm |
Wed, 03 May 2017 23:04:25 +0200 | |
changeset 65703 | cead65c19f2e |
parent 64370 | 865b39487b5d |
child 69393 | ed0824ef337e |
permissions | -rw-r--r-- |
38473 | 1 |
/* Title: Pure/General/sha1.scala |
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Author: Makarius |
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Digest strings according to SHA-1 (see 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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object SHA1 |
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{ |
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55802
f7ceebe2f1b5
prefer abstract datatype -- in accordance to ML version;
wenzelm
parents:
54440
diff
changeset
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final class Digest private[SHA1](val rep: String) |
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{ |
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 { |
f7ceebe2f1b5
prefer abstract datatype -- in accordance to ML version;
wenzelm
parents:
54440
diff
changeset
|
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case other: Digest => rep == other.rep |
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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override def toString: String = rep |
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} |
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private def make_result(digest: MessageDigest): Digest = |
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{ |
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val result = new StringBuilder |
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for (b <- digest.digest()) { |
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val i = b.asInstanceOf[Int] & 0xFF |
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if (i < 16) result += '0' |
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result ++= Integer.toHexString(i) |
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} |
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55802
f7ceebe2f1b5
prefer abstract datatype -- in accordance to ML version;
wenzelm
parents:
54440
diff
changeset
|
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new Digest(result.toString) |
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} |
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def fake(rep: String): Digest = new Digest(rep) |
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def digest(file: JFile): Digest = |
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{ |
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val stream = new FileInputStream(file) |
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val digest = MessageDigest.getInstance("SHA") |
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val buf = new Array[Byte](65536) |
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var m = 0 |
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try { |
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do { |
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m = stream.read(buf, 0, buf.length) |
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if (m != -1) digest.update(buf, 0, m) |
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} while (m != -1) |
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} |
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finally { stream.close } |
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make_result(digest) |
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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) |
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(bytes: Array[Byte]): Digest = |
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{ |
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val digest = MessageDigest.getInstance("SHA") |
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digest.update(bytes) |
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make_result(digest) |
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} |
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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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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("").rep.length |
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} |