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OpenSSLMessageDigest.java API Doc Android 1.5 API 3090 Wed May 06 22:41:06 BST 2009 org.apache.harmony.xnet.provider.jsse

OpenSSLMessageDigest

java.lang.Object

public class OpenSSLMessageDigest extends Object implements org.bouncycastle.crypto.ExtendedDigest

Implements the BouncyCastle Digest interface using OpenSSL's EVP API.

Fields Summary
private String
algorithm
Holds the name of the hashing algorithm, e.g. "SHA-1";
private int
ctx
Holds a pointer to the native message digest context.
private byte[]
singleByte
Holds a dummy buffer for writing single bytes to the digest.
Constructors Summary
private OpenSSLMessageDigest(String algorithm)
Creates a new OpenSSLMessageDigest instance for the given algorithm name.
param
algorithm The name of the algorithm, e.g. "SHA1".
this.algorithm = algorithm; ctx = NativeCrypto.EVP_new(); try { NativeCrypto.EVP_DigestInit(ctx, algorithm.replace("-", "").toLowerCase()); } catch (Exception ex) { throw new RuntimeException(ex.getMessage() + " (" + algorithm + ")"); }
Methods Summary
public int doFinal(byte[] out, int outOff)
int i = NativeCrypto.EVP_DigestFinal(ctx, out, outOff); reset(); return i;
protected void finalize()
super.finalize(); NativeCrypto.EVP_free(ctx);
public java.lang.String getAlgorithmName()
return algorithm;
public int getByteLength()
return NativeCrypto.EVP_DigestBlockSize(ctx);
public int getDigestSize()
return NativeCrypto.EVP_DigestSize(ctx);
public static org.apache.harmony.xnet.provider.jsse.OpenSSLMessageDigest getInstance(java.lang.String algorithm)
Creates a new OpenSSLMessageDigest instance for the given algorithm name.
param
algorithm The name of the algorithm, e.g. "SHA1".
return
The new OpenSSLMessageDigest instance.
throws
RuntimeException In case of problems.
return new OpenSSLMessageDigest(algorithm);
public void reset()
NativeCrypto.EVP_DigestInit(ctx, algorithm.replace("-", "").toLowerCase());
public void update(byte in)
singleByte[0] = in; NativeCrypto.EVP_DigestUpdate(ctx, singleByte, 0, 1);
public void update(byte[] in, int inOff, int len)
NativeCrypto.EVP_DigestUpdate(ctx, in, inOff, len);