http://www.bouncycastle.org/java.html: The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
  • The Legion of the Bouncy Castle Inc. 
class org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator implements org.bouncycastle.operator.DigestCalculator
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator
  super_class: java.lang.Object
{
  private java.io.ByteArrayOutputStream bOut;
    descriptor: Ljava/io/ByteArrayOutputStream;
    flags: (0x0002) ACC_PRIVATE

  private java.security.MessageDigest digest;
    descriptor: Ljava/security/MessageDigest;
    flags: (0x0002) ACC_PRIVATE

  public void <init>(java.security.MessageDigest);
    descriptor: (Ljava/security/MessageDigest;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator this
        start local 1 // java.security.MessageDigest digest
         0: .line 200
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 197
            aload 0 /* this */
            new java.io.ByteArrayOutputStream
            dup
            invokespecial java.io.ByteArrayOutputStream.<init>:()V
            putfield org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator.bOut:Ljava/io/ByteArrayOutputStream;
         2: .line 202
            aload 0 /* this */
            aload 1 /* digest */
            putfield org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator.digest:Ljava/security/MessageDigest;
         3: .line 203
            return
        end local 1 // java.security.MessageDigest digest
        end local 0 // org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lorg/bouncycastle/cert/jcajce/JcaX509ExtensionUtils$SHA1DigestCalculator;
            0    4     1  digest  Ljava/security/MessageDigest;
    MethodParameters:
        Name  Flags
      digest  

  public org.bouncycastle.asn1.x509.AlgorithmIdentifier getAlgorithmIdentifier();
    descriptor: ()Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator this
         0: .line 207
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            getstatic org.bouncycastle.asn1.oiw.OIWObjectIdentifiers.idSHA1:Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;)V
            areturn
        end local 0 // org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cert/jcajce/JcaX509ExtensionUtils$SHA1DigestCalculator;

  public java.io.OutputStream getOutputStream();
    descriptor: ()Ljava/io/OutputStream;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator this
         0: .line 212
            aload 0 /* this */
            getfield org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator.bOut:Ljava/io/ByteArrayOutputStream;
            areturn
        end local 0 // org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cert/jcajce/JcaX509ExtensionUtils$SHA1DigestCalculator;

  public byte[] getDigest();
    descriptor: ()[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator this
         0: .line 217
            aload 0 /* this */
            getfield org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator.digest:Ljava/security/MessageDigest;
            aload 0 /* this */
            getfield org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator.bOut:Ljava/io/ByteArrayOutputStream;
            invokevirtual java.io.ByteArrayOutputStream.toByteArray:()[B
            invokevirtual java.security.MessageDigest.digest:([B)[B
            astore 1 /* bytes */
        start local 1 // byte[] bytes
         1: .line 219
            aload 0 /* this */
            getfield org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator.bOut:Ljava/io/ByteArrayOutputStream;
            invokevirtual java.io.ByteArrayOutputStream.reset:()V
         2: .line 221
            aload 1 /* bytes */
            areturn
        end local 1 // byte[] bytes
        end local 0 // org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lorg/bouncycastle/cert/jcajce/JcaX509ExtensionUtils$SHA1DigestCalculator;
            1    3     1  bytes  [B
}
SourceFile: "JcaX509ExtensionUtils.java"
NestHost: org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils
InnerClasses:
  private SHA1DigestCalculator = org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils$SHA1DigestCalculator of org.bouncycastle.cert.jcajce.JcaX509ExtensionUtils