final class sun.security.ssl.HKDF
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: sun.security.ssl.HKDF
  super_class: java.lang.Object
{
  private final java.lang.String hmacAlg;
    descriptor: Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final javax.crypto.Mac hmacObj;
    descriptor: Ljavax/crypto/Mac;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final int hmacLen;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0000) 
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // sun.security.ssl.HKDF this
        start local 1 // java.lang.String hashAlg
         0: .line 61
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 62
            aload 1 /* hashAlg */
         2: .line 63
            ldc "Must provide underlying HKDF Digest algorithm."
         3: .line 62
            invokestatic java.util.Objects.requireNonNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            pop
         4: .line 64
            aload 0 /* this */
            new java.lang.StringBuilder
            dup
            ldc "Hmac"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 1 /* hashAlg */
            ldc "-"
            ldc ""
            invokevirtual java.lang.String.replace:(Ljava/lang/CharSequence;Ljava/lang/CharSequence;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            putfield sun.security.ssl.HKDF.hmacAlg:Ljava/lang/String;
         5: .line 65
            aload 0 /* this */
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacAlg:Ljava/lang/String;
            invokestatic javax.crypto.Mac.getInstance:(Ljava/lang/String;)Ljavax/crypto/Mac;
            putfield sun.security.ssl.HKDF.hmacObj:Ljavax/crypto/Mac;
         6: .line 66
            aload 0 /* this */
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacObj:Ljavax/crypto/Mac;
            invokevirtual javax.crypto.Mac.getMacLength:()I
            putfield sun.security.ssl.HKDF.hmacLen:I
         7: .line 67
            return
        end local 1 // java.lang.String hashAlg
        end local 0 // sun.security.ssl.HKDF this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    8     0     this  Lsun/security/ssl/HKDF;
            0    8     1  hashAlg  Ljava/lang/String;
    Exceptions:
      throws java.security.NoSuchAlgorithmException
    MethodParameters:
         Name  Flags
      hashAlg  

  javax.crypto.SecretKey extract(javax.crypto.SecretKey, javax.crypto.SecretKey, java.lang.String);
    descriptor: (Ljavax/crypto/SecretKey;Ljavax/crypto/SecretKey;Ljava/lang/String;)Ljavax/crypto/SecretKey;
    flags: (0x0000) 
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // sun.security.ssl.HKDF this
        start local 1 // javax.crypto.SecretKey salt
        start local 2 // javax.crypto.SecretKey inputKey
        start local 3 // java.lang.String keyAlg
         0: .line 88
            aload 1 /* salt */
            ifnonnull 2
         1: .line 89
            new javax.crypto.spec.SecretKeySpec
            dup
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacLen:I
            newarray 8
            ldc "HKDF-Salt"
            invokespecial javax.crypto.spec.SecretKeySpec.<init>:([BLjava/lang/String;)V
            astore 1 /* salt */
         2: .line 91
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacObj:Ljavax/crypto/Mac;
            aload 1 /* salt */
            invokevirtual javax.crypto.Mac.init:(Ljava/security/Key;)V
         3: .line 93
            new javax.crypto.spec.SecretKeySpec
            dup
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacObj:Ljavax/crypto/Mac;
            aload 2 /* inputKey */
            invokeinterface javax.crypto.SecretKey.getEncoded:()[B
            invokevirtual javax.crypto.Mac.doFinal:([B)[B
         4: .line 94
            aload 3 /* keyAlg */
         5: .line 93
            invokespecial javax.crypto.spec.SecretKeySpec.<init>:([BLjava/lang/String;)V
            areturn
        end local 3 // java.lang.String keyAlg
        end local 2 // javax.crypto.SecretKey inputKey
        end local 1 // javax.crypto.SecretKey salt
        end local 0 // sun.security.ssl.HKDF this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    6     0      this  Lsun/security/ssl/HKDF;
            0    6     1      salt  Ljavax/crypto/SecretKey;
            0    6     2  inputKey  Ljavax/crypto/SecretKey;
            0    6     3    keyAlg  Ljava/lang/String;
    Exceptions:
      throws java.security.InvalidKeyException
    MethodParameters:
          Name  Flags
      salt      
      inputKey  
      keyAlg    

  javax.crypto.SecretKey extract(byte[], javax.crypto.SecretKey, java.lang.String);
    descriptor: ([BLjavax/crypto/SecretKey;Ljava/lang/String;)Ljavax/crypto/SecretKey;
    flags: (0x0000) 
    Code:
      stack=5, locals=4, args_size=4
        start local 0 // sun.security.ssl.HKDF this
        start local 1 // byte[] salt
        start local 2 // javax.crypto.SecretKey inputKey
        start local 3 // java.lang.String keyAlg
         0: .line 116
            aload 1 /* salt */
            ifnonnull 2
         1: .line 117
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacLen:I
            newarray 8
            astore 1 /* salt */
         2: .line 119
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            new javax.crypto.spec.SecretKeySpec
            dup
            aload 1 /* salt */
            ldc "HKDF-Salt"
            invokespecial javax.crypto.spec.SecretKeySpec.<init>:([BLjava/lang/String;)V
            aload 2 /* inputKey */
            aload 3 /* keyAlg */
            invokevirtual sun.security.ssl.HKDF.extract:(Ljavax/crypto/SecretKey;Ljavax/crypto/SecretKey;Ljava/lang/String;)Ljavax/crypto/SecretKey;
            areturn
        end local 3 // java.lang.String keyAlg
        end local 2 // javax.crypto.SecretKey inputKey
        end local 1 // byte[] salt
        end local 0 // sun.security.ssl.HKDF this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lsun/security/ssl/HKDF;
            0    3     1      salt  [B
            0    3     2  inputKey  Ljavax/crypto/SecretKey;
            0    3     3    keyAlg  Ljava/lang/String;
    Exceptions:
      throws java.security.InvalidKeyException
    MethodParameters:
          Name  Flags
      salt      
      inputKey  
      keyAlg    

  javax.crypto.SecretKey expand(javax.crypto.SecretKey, byte[], int, java.lang.String);
    descriptor: (Ljavax/crypto/SecretKey;[BILjava/lang/String;)Ljavax/crypto/SecretKey;
    flags: (0x0000) 
    Code:
      stack=6, locals=11, args_size=5
        start local 0 // sun.security.ssl.HKDF this
        start local 1 // javax.crypto.SecretKey pseudoRandKey
        start local 2 // byte[] info
        start local 3 // int outLen
        start local 4 // java.lang.String keyAlg
         0: .line 143
            aload 1 /* pseudoRandKey */
            ldc "A null PRK is not allowed."
            invokestatic java.util.Objects.requireNonNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            pop
         1: .line 146
            iload 3 /* outLen */
            sipush 255
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacLen:I
            imul
            if_icmple 3
         2: .line 147
            new java.lang.IllegalArgumentException
            dup
            ldc "Requested output length exceeds maximum length allowed for HKDF expansion"
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         3: .line 150
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacObj:Ljavax/crypto/Mac;
            aload 1 /* pseudoRandKey */
            invokevirtual javax.crypto.Mac.init:(Ljava/security/Key;)V
         4: .line 151
            aload 2 /* info */
            ifnonnull 6
         5: .line 152
            iconst_0
            newarray 8
            astore 2 /* info */
         6: .line 154
      StackMap locals:
      StackMap stack:
            iload 3 /* outLen */
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacLen:I
            iadd
            iconst_1
            isub
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacLen:I
            idiv
            istore 6 /* rounds */
        start local 6 // int rounds
         7: .line 155
            iload 6 /* rounds */
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacLen:I
            imul
            newarray 8
            astore 5 /* kdfOutput */
        start local 5 // byte[] kdfOutput
         8: .line 156
            iconst_0
            istore 7 /* offset */
        start local 7 // int offset
         9: .line 157
            iconst_0
            istore 8 /* tLength */
        start local 8 // int tLength
        10: .line 159
            iconst_0
            istore 9 /* i */
        start local 9 // int i
        11: goto 24
        12: .line 167
      StackMap locals: sun.security.ssl.HKDF javax.crypto.SecretKey byte[] int java.lang.String byte[] int int int int
      StackMap stack:
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacObj:Ljavax/crypto/Mac;
            aload 5 /* kdfOutput */
        13: .line 168
            iconst_0
            iload 7 /* offset */
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacLen:I
            isub
            invokestatic java.lang.Math.max:(II)I
            iload 8 /* tLength */
        14: .line 167
            invokevirtual javax.crypto.Mac.update:([BII)V
        15: .line 169
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacObj:Ljavax/crypto/Mac;
            aload 2 /* info */
            invokevirtual javax.crypto.Mac.update:([B)V
        16: .line 170
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacObj:Ljavax/crypto/Mac;
            iload 9 /* i */
            iconst_1
            iadd
            i2b
            invokevirtual javax.crypto.Mac.update:(B)V
        17: .line 171
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacObj:Ljavax/crypto/Mac;
            aload 5 /* kdfOutput */
            iload 7 /* offset */
            invokevirtual javax.crypto.Mac.doFinal:([BI)V
        18: .line 173
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacLen:I
            istore 8 /* tLength */
        19: .line 174
            iload 7 /* offset */
            aload 0 /* this */
            getfield sun.security.ssl.HKDF.hmacLen:I
            iadd
            istore 7 /* offset */
        20: .line 175
            goto 23
      StackMap locals:
      StackMap stack: javax.crypto.ShortBufferException
        21: astore 10 /* sbe */
        start local 10 // javax.crypto.ShortBufferException sbe
        22: .line 179
            new java.lang.RuntimeException
            dup
            aload 10 /* sbe */
            invokespecial java.lang.RuntimeException.<init>:(Ljava/lang/Throwable;)V
            athrow
        end local 10 // javax.crypto.ShortBufferException sbe
        23: .line 159
      StackMap locals:
      StackMap stack:
            iinc 9 /* i */ 1
      StackMap locals:
      StackMap stack:
        24: iload 9 /* i */
            iload 6 /* rounds */
            if_icmplt 12
        end local 9 // int i
        25: .line 183
            new javax.crypto.spec.SecretKeySpec
            dup
            aload 5 /* kdfOutput */
            iconst_0
            iload 3 /* outLen */
            aload 4 /* keyAlg */
            invokespecial javax.crypto.spec.SecretKeySpec.<init>:([BIILjava/lang/String;)V
            areturn
        end local 8 // int tLength
        end local 7 // int offset
        end local 6 // int rounds
        end local 5 // byte[] kdfOutput
        end local 4 // java.lang.String keyAlg
        end local 3 // int outLen
        end local 2 // byte[] info
        end local 1 // javax.crypto.SecretKey pseudoRandKey
        end local 0 // sun.security.ssl.HKDF this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   26     0           this  Lsun/security/ssl/HKDF;
            0   26     1  pseudoRandKey  Ljavax/crypto/SecretKey;
            0   26     2           info  [B
            0   26     3         outLen  I
            0   26     4         keyAlg  Ljava/lang/String;
            8   26     5      kdfOutput  [B
            7   26     6         rounds  I
            9   26     7         offset  I
           10   26     8        tLength  I
           11   25     9              i  I
           22   23    10            sbe  Ljavax/crypto/ShortBufferException;
      Exception table:
        from    to  target  type
          12    20      21  Class javax.crypto.ShortBufferException
    Exceptions:
      throws java.security.InvalidKeyException
    MethodParameters:
               Name  Flags
      pseudoRandKey  
      info           
      outLen         
      keyAlg         
}
SourceFile: "HKDF.java"