diff options
Diffstat (limited to 'bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA1Digest.java')
-rw-r--r-- | bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA1Digest.java | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA1Digest.java b/bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA1Digest.java index 21b1024..450dda4 100644 --- a/bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA1Digest.java +++ b/bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA1Digest.java @@ -1,7 +1,7 @@ package org.bouncycastle.crypto.digests; -import org.bouncycastle.crypto.util.Pack; import org.bouncycastle.util.Memoable; +import org.bouncycastle.util.Pack; /** * implementation of SHA-1 as outlined in "Handbook of Applied Cryptography", pages 346 - 349. @@ -11,6 +11,7 @@ import org.bouncycastle.util.Memoable; */ public class SHA1Digest extends GeneralDigest + implements EncodableDigest { private static final int DIGEST_LENGTH = 20; @@ -38,6 +39,23 @@ public class SHA1Digest copyIn(t); } + public SHA1Digest(byte[] encodedState) + { + super(encodedState); + + H1 = Pack.bigEndianToInt(encodedState, 16); + H2 = Pack.bigEndianToInt(encodedState, 20); + H3 = Pack.bigEndianToInt(encodedState, 24); + H4 = Pack.bigEndianToInt(encodedState, 28); + H5 = Pack.bigEndianToInt(encodedState, 32); + + xOff = Pack.bigEndianToInt(encodedState, 36); + for (int i = 0; i != xOff; i++) + { + X[i] = Pack.bigEndianToInt(encodedState, 40 + (i * 4)); + } + } + private void copyIn(SHA1Digest t) { H1 = t.H1; @@ -302,6 +320,27 @@ public class SHA1Digest super.copyIn(d); copyIn(d); } + + public byte[] getEncodedState() + { + byte[] state = new byte[40 + xOff * 4]; + + super.populateState(state); + + Pack.intToBigEndian(H1, state, 16); + Pack.intToBigEndian(H2, state, 20); + Pack.intToBigEndian(H3, state, 24); + Pack.intToBigEndian(H4, state, 28); + Pack.intToBigEndian(H5, state, 32); + Pack.intToBigEndian(xOff, state, 36); + + for (int i = 0; i != xOff; i++) + { + Pack.intToBigEndian(X[i], state, 40 + (i * 4)); + } + + return state; + } } |