https://spring.io/spring-security: spring-security-crypto (spring.io)
  • Rob Winch
  • Joe Grandja 
public class org.springframework.security.crypto.argon2.Argon2PasswordEncoder implements org.springframework.security.crypto.password.PasswordEncoder
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.springframework.security.crypto.argon2.Argon2PasswordEncoder
  super_class: java.lang.Object
{
  private static final int DEFAULT_SALT_LENGTH;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 16

  private static final int DEFAULT_HASH_LENGTH;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 32

  private static final int DEFAULT_PARALLELISM;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private static final int DEFAULT_MEMORY;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 4096

  private static final int DEFAULT_ITERATIONS;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 3

  private final org.apache.commons.logging.Log logger;
    descriptor: Lorg/apache/commons/logging/Log;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

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

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

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

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

  private final org.springframework.security.crypto.keygen.BytesKeyGenerator saltGenerator;
    descriptor: Lorg/springframework/security/crypto/keygen/BytesKeyGenerator;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=1, args_size=1
        start local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
         0: .line 72
            aload 0 /* this */
            bipush 16
            bipush 32
            iconst_1
            sipush 4096
            iconst_3
            invokespecial org.springframework.security.crypto.argon2.Argon2PasswordEncoder.<init>:(IIIII)V
         1: .line 73
            return
        end local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/springframework/security/crypto/argon2/Argon2PasswordEncoder;

  public void <init>(int, int, int, int, int);
    descriptor: (IIIII)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=6, args_size=6
        start local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
        start local 1 // int saltLength
        start local 2 // int hashLength
        start local 3 // int parallelism
        start local 4 // int memory
        start local 5 // int iterations
         0: .line 75
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 59
            aload 0 /* this */
            aload 0 /* this */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokestatic org.apache.commons.logging.LogFactory.getLog:(Ljava/lang/Class;)Lorg/apache/commons/logging/Log;
            putfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.logger:Lorg/apache/commons/logging/Log;
         2: .line 76
            aload 0 /* this */
            iload 2 /* hashLength */
            putfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.hashLength:I
         3: .line 77
            aload 0 /* this */
            iload 3 /* parallelism */
            putfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.parallelism:I
         4: .line 78
            aload 0 /* this */
            iload 4 /* memory */
            putfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.memory:I
         5: .line 79
            aload 0 /* this */
            iload 5 /* iterations */
            putfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.iterations:I
         6: .line 80
            aload 0 /* this */
            iload 1 /* saltLength */
            invokestatic org.springframework.security.crypto.keygen.KeyGenerators.secureRandom:(I)Lorg/springframework/security/crypto/keygen/BytesKeyGenerator;
            putfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.saltGenerator:Lorg/springframework/security/crypto/keygen/BytesKeyGenerator;
         7: .line 81
            return
        end local 5 // int iterations
        end local 4 // int memory
        end local 3 // int parallelism
        end local 2 // int hashLength
        end local 1 // int saltLength
        end local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    8     0         this  Lorg/springframework/security/crypto/argon2/Argon2PasswordEncoder;
            0    8     1   saltLength  I
            0    8     2   hashLength  I
            0    8     3  parallelism  I
            0    8     4       memory  I
            0    8     5   iterations  I
    MethodParameters:
             Name  Flags
      saltLength   
      hashLength   
      parallelism  
      memory       
      iterations   

  public java.lang.String encode(java.lang.CharSequence);
    descriptor: (Ljava/lang/CharSequence;)Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=6, args_size=2
        start local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
        start local 1 // java.lang.CharSequence rawPassword
         0: .line 85
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.saltGenerator:Lorg/springframework/security/crypto/keygen/BytesKeyGenerator;
            invokeinterface org.springframework.security.crypto.keygen.BytesKeyGenerator.generateKey:()[B
            astore 2 /* salt */
        start local 2 // byte[] salt
         1: .line 86
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.hashLength:I
            newarray 8
            astore 3 /* hash */
        start local 3 // byte[] hash
         2: .line 88
            new org.bouncycastle.crypto.params.Argon2Parameters$Builder
            dup
         3: .line 89
            iconst_2
         4: .line 88
            invokespecial org.bouncycastle.crypto.params.Argon2Parameters$Builder.<init>:(I)V
         5: .line 90
            aload 2 /* salt */
            invokevirtual org.bouncycastle.crypto.params.Argon2Parameters$Builder.withSalt:([B)Lorg/bouncycastle/crypto/params/Argon2Parameters$Builder;
         6: .line 91
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.parallelism:I
            invokevirtual org.bouncycastle.crypto.params.Argon2Parameters$Builder.withParallelism:(I)Lorg/bouncycastle/crypto/params/Argon2Parameters$Builder;
         7: .line 92
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.memory:I
            invokevirtual org.bouncycastle.crypto.params.Argon2Parameters$Builder.withMemoryAsKB:(I)Lorg/bouncycastle/crypto/params/Argon2Parameters$Builder;
         8: .line 93
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.iterations:I
            invokevirtual org.bouncycastle.crypto.params.Argon2Parameters$Builder.withIterations:(I)Lorg/bouncycastle/crypto/params/Argon2Parameters$Builder;
         9: .line 94
            invokevirtual org.bouncycastle.crypto.params.Argon2Parameters$Builder.build:()Lorg/bouncycastle/crypto/params/Argon2Parameters;
        10: .line 88
            astore 4 /* params */
        start local 4 // org.bouncycastle.crypto.params.Argon2Parameters params
        11: .line 96
            new org.bouncycastle.crypto.generators.Argon2BytesGenerator
            dup
            invokespecial org.bouncycastle.crypto.generators.Argon2BytesGenerator.<init>:()V
            astore 5 /* generator */
        start local 5 // org.bouncycastle.crypto.generators.Argon2BytesGenerator generator
        12: .line 97
            aload 5 /* generator */
            aload 4 /* params */
            invokevirtual org.bouncycastle.crypto.generators.Argon2BytesGenerator.init:(Lorg/bouncycastle/crypto/params/Argon2Parameters;)V
        13: .line 98
            aload 5 /* generator */
            aload 1 /* rawPassword */
            invokeinterface java.lang.CharSequence.toString:()Ljava/lang/String;
            invokevirtual java.lang.String.toCharArray:()[C
            aload 3 /* hash */
            invokevirtual org.bouncycastle.crypto.generators.Argon2BytesGenerator.generateBytes:([C[B)I
            pop
        14: .line 99
            aload 3 /* hash */
            aload 4 /* params */
            invokestatic org.springframework.security.crypto.argon2.Argon2EncodingUtils.encode:([BLorg/bouncycastle/crypto/params/Argon2Parameters;)Ljava/lang/String;
            areturn
        end local 5 // org.bouncycastle.crypto.generators.Argon2BytesGenerator generator
        end local 4 // org.bouncycastle.crypto.params.Argon2Parameters params
        end local 3 // byte[] hash
        end local 2 // byte[] salt
        end local 1 // java.lang.CharSequence rawPassword
        end local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0   15     0         this  Lorg/springframework/security/crypto/argon2/Argon2PasswordEncoder;
            0   15     1  rawPassword  Ljava/lang/CharSequence;
            1   15     2         salt  [B
            2   15     3         hash  [B
           11   15     4       params  Lorg/bouncycastle/crypto/params/Argon2Parameters;
           12   15     5    generator  Lorg/bouncycastle/crypto/generators/Argon2BytesGenerator;
    MethodParameters:
             Name  Flags
      rawPassword  

  public boolean matches(java.lang.CharSequence, java.lang.String);
    descriptor: (Ljava/lang/CharSequence;Ljava/lang/String;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=6, args_size=3
        start local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
        start local 1 // java.lang.CharSequence rawPassword
        start local 2 // java.lang.String encodedPassword
         0: .line 104
            aload 2 /* encodedPassword */
            ifnonnull 3
         1: .line 105
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.logger:Lorg/apache/commons/logging/Log;
            ldc "password hash is null"
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
         2: .line 106
            iconst_0
            ireturn
         3: .line 110
      StackMap locals:
      StackMap stack:
            aload 2 /* encodedPassword */
            invokestatic org.springframework.security.crypto.argon2.Argon2EncodingUtils.decode:(Ljava/lang/String;)Lorg/springframework/security/crypto/argon2/Argon2EncodingUtils$Argon2Hash;
            astore 3 /* decoded */
        start local 3 // org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash decoded
         4: .line 111
            goto 8
        end local 3 // org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash decoded
         5: .line 112
      StackMap locals:
      StackMap stack: java.lang.IllegalArgumentException
            astore 4 /* ex */
        start local 4 // java.lang.IllegalArgumentException ex
         6: .line 113
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.logger:Lorg/apache/commons/logging/Log;
            ldc "Malformed password hash"
            aload 4 /* ex */
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;Ljava/lang/Throwable;)V
         7: .line 114
            iconst_0
            ireturn
        end local 4 // java.lang.IllegalArgumentException ex
        start local 3 // org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash decoded
         8: .line 116
      StackMap locals: org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash
      StackMap stack:
            aload 3 /* decoded */
            invokevirtual org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash.getHash:()[B
            arraylength
            newarray 8
            astore 4 /* hashBytes */
        start local 4 // byte[] hashBytes
         9: .line 117
            new org.bouncycastle.crypto.generators.Argon2BytesGenerator
            dup
            invokespecial org.bouncycastle.crypto.generators.Argon2BytesGenerator.<init>:()V
            astore 5 /* generator */
        start local 5 // org.bouncycastle.crypto.generators.Argon2BytesGenerator generator
        10: .line 118
            aload 5 /* generator */
            aload 3 /* decoded */
            invokevirtual org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash.getParameters:()Lorg/bouncycastle/crypto/params/Argon2Parameters;
            invokevirtual org.bouncycastle.crypto.generators.Argon2BytesGenerator.init:(Lorg/bouncycastle/crypto/params/Argon2Parameters;)V
        11: .line 119
            aload 5 /* generator */
            aload 1 /* rawPassword */
            invokeinterface java.lang.CharSequence.toString:()Ljava/lang/String;
            invokevirtual java.lang.String.toCharArray:()[C
            aload 4 /* hashBytes */
            invokevirtual org.bouncycastle.crypto.generators.Argon2BytesGenerator.generateBytes:([C[B)I
            pop
        12: .line 120
            aload 3 /* decoded */
            invokevirtual org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash.getHash:()[B
            aload 4 /* hashBytes */
            invokestatic org.springframework.security.crypto.argon2.Argon2PasswordEncoder.constantTimeArrayEquals:([B[B)Z
            ireturn
        end local 5 // org.bouncycastle.crypto.generators.Argon2BytesGenerator generator
        end local 4 // byte[] hashBytes
        end local 3 // org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash decoded
        end local 2 // java.lang.String encodedPassword
        end local 1 // java.lang.CharSequence rawPassword
        end local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0   13     0             this  Lorg/springframework/security/crypto/argon2/Argon2PasswordEncoder;
            0   13     1      rawPassword  Ljava/lang/CharSequence;
            0   13     2  encodedPassword  Ljava/lang/String;
            4    5     3          decoded  Lorg/springframework/security/crypto/argon2/Argon2EncodingUtils$Argon2Hash;
            8   13     3          decoded  Lorg/springframework/security/crypto/argon2/Argon2EncodingUtils$Argon2Hash;
            6    8     4               ex  Ljava/lang/IllegalArgumentException;
            9   13     4        hashBytes  [B
           10   13     5        generator  Lorg/bouncycastle/crypto/generators/Argon2BytesGenerator;
      Exception table:
        from    to  target  type
           3     4       5  Class java.lang.IllegalArgumentException
    MethodParameters:
                 Name  Flags
      rawPassword      
      encodedPassword  

  public boolean upgradeEncoding(java.lang.String);
    descriptor: (Ljava/lang/String;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
        start local 1 // java.lang.String encodedPassword
         0: .line 125
            aload 1 /* encodedPassword */
            ifnull 1
            aload 1 /* encodedPassword */
            invokevirtual java.lang.String.length:()I
            ifne 3
         1: .line 126
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.logger:Lorg/apache/commons/logging/Log;
            ldc "password hash is null"
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
         2: .line 127
            iconst_0
            ireturn
         3: .line 129
      StackMap locals:
      StackMap stack:
            aload 1 /* encodedPassword */
            invokestatic org.springframework.security.crypto.argon2.Argon2EncodingUtils.decode:(Ljava/lang/String;)Lorg/springframework/security/crypto/argon2/Argon2EncodingUtils$Argon2Hash;
            invokevirtual org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash.getParameters:()Lorg/bouncycastle/crypto/params/Argon2Parameters;
            astore 2 /* parameters */
        start local 2 // org.bouncycastle.crypto.params.Argon2Parameters parameters
         4: .line 130
            aload 2 /* parameters */
            invokevirtual org.bouncycastle.crypto.params.Argon2Parameters.getMemory:()I
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.memory:I
            if_icmplt 5
            aload 2 /* parameters */
            invokevirtual org.bouncycastle.crypto.params.Argon2Parameters.getIterations:()I
            aload 0 /* this */
            getfield org.springframework.security.crypto.argon2.Argon2PasswordEncoder.iterations:I
            if_icmplt 5
            iconst_0
            ireturn
      StackMap locals: org.bouncycastle.crypto.params.Argon2Parameters
      StackMap stack:
         5: iconst_1
            ireturn
        end local 2 // org.bouncycastle.crypto.params.Argon2Parameters parameters
        end local 1 // java.lang.String encodedPassword
        end local 0 // org.springframework.security.crypto.argon2.Argon2PasswordEncoder this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    6     0             this  Lorg/springframework/security/crypto/argon2/Argon2PasswordEncoder;
            0    6     1  encodedPassword  Ljava/lang/String;
            4    6     2       parameters  Lorg/bouncycastle/crypto/params/Argon2Parameters;
    MethodParameters:
                 Name  Flags
      encodedPassword  

  private static boolean constantTimeArrayEquals(byte[], byte[]);
    descriptor: ([B[B)Z
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=4, locals=4, args_size=2
        start local 0 // byte[] expected
        start local 1 // byte[] actual
         0: .line 134
            aload 0 /* expected */
            arraylength
            aload 1 /* actual */
            arraylength
            if_icmpeq 2
         1: .line 135
            iconst_0
            ireturn
         2: .line 137
      StackMap locals:
      StackMap stack:
            iconst_0
            istore 2 /* result */
        start local 2 // int result
         3: .line 138
            iconst_0
            istore 3 /* i */
        start local 3 // int i
         4: goto 7
         5: .line 139
      StackMap locals: int int
      StackMap stack:
            iload 2 /* result */
            aload 0 /* expected */
            iload 3 /* i */
            baload
            aload 1 /* actual */
            iload 3 /* i */
            baload
            ixor
            ior
            istore 2 /* result */
         6: .line 138
            iinc 3 /* i */ 1
      StackMap locals:
      StackMap stack:
         7: iload 3 /* i */
            aload 0 /* expected */
            arraylength
            if_icmplt 5
        end local 3 // int i
         8: .line 141
            iload 2 /* result */
            ifne 9
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         9: iconst_0
            ireturn
        end local 2 // int result
        end local 1 // byte[] actual
        end local 0 // byte[] expected
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   10     0  expected  [B
            0   10     1    actual  [B
            3   10     2    result  I
            4    8     3         i  I
    MethodParameters:
          Name  Flags
      expected  
      actual    
}
SourceFile: "Argon2PasswordEncoder.java"
InnerClasses:
  public Builder = org.bouncycastle.crypto.params.Argon2Parameters$Builder of org.bouncycastle.crypto.params.Argon2Parameters
  public Argon2Hash = org.springframework.security.crypto.argon2.Argon2EncodingUtils$Argon2Hash of org.springframework.security.crypto.argon2.Argon2EncodingUtils