Package io.minio

Class Checksum

java.lang.Object

io.minio.Checksum

public class Checksum
extends Object

Collection of checksum algorithms.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	Checksum.Algorithm	Checksum algorithm.
static class	Checksum.CRC32	CRC32 Checksum.Hasher.
static class	Checksum.CRC32C	CRC32C Checksum.Hasher.
static class	Checksum.CRC64NVME	CRC64NVME Checksum.Hasher copied from https://github.com/minio/crc64nvme.
static interface	Checksum.Hasher	Checksum hasher.
static class	Checksum.MD5	MD5 Checksum.Hasher.
static class	Checksum.SHA1	SHA1 Checksum.Hasher.
static class	Checksum.SHA256	SHA256 Checksum.Hasher.
static enum	Checksum.Type	Algorithm type.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	UNSIGNED_PAYLOAD
static final String	ZERO_MD5_HASH	MD5 hash of zero length byte array.
static final String	ZERO_SHA256_HASH	SHA-256 hash of zero length byte array.

Method Summary

Modifier and Type	Method	Description
static String	base64String(byte[] sum)	Encodes the specified bytes to Base64 string.
static byte[]	base64StringToSum(String sum)	Decodes the specified base64 encoded string to bytes.
static String	hexString(byte[] sum)	Encodes the specified bytes to Base16 string.
static byte[]	hexStringToSum(String sum)	Decodes the specified Base16 encoded string to bytes.
static Http.Headers	makeHeaders(Map<Checksum.Algorithm,Checksum.Hasher> hashers, boolean addContentSha256, boolean addSha256Checksum)	Makes checksum headers for given hashers.
static Map<Checksum.Algorithm,Checksum.Hasher>	newHasherMap(Checksum.Algorithm[] algorithms)	Creates hasher map for the specified algorithms.
static void	update(Map<Checksum.Algorithm,Checksum.Hasher> hashers, byte[] data, int length)	Updates each hasher using the specified array of bytes, ending at the specified length.
static void	update(Map<Checksum.Algorithm,Checksum.Hasher> hashers, ByteBuffer buffer)	Updates each hasher using the specified byte buffer.
static void	update(Map<Checksum.Algorithm,Checksum.Hasher> hashers, RandomAccessFile file, long size)	Updates each hasher using the specified file, ending at the specified size.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

ZERO_MD5_HASH

public static final String ZERO_MD5_HASH

MD5 hash of zero length byte array.

See Also:

• Constant Field Values

ZERO_SHA256_HASH

public static final String ZERO_SHA256_HASH

SHA-256 hash of zero length byte array.

See Also:

• Constant Field Values

UNSIGNED_PAYLOAD

public static final String UNSIGNED_PAYLOAD

See Also:

• Constant Field Values

Method Details

base64String

public static String base64String(byte[] sum)

Encodes the specified bytes to Base64 string.

base64StringToSum

public static byte[] base64StringToSum(String sum)

Decodes the specified base64 encoded string to bytes.

hexString

public static String hexString(byte[] sum)

Encodes the specified bytes to Base16 string.

hexStringToSum

public static byte[] hexStringToSum(String sum)

Decodes the specified Base16 encoded string to bytes.

newHasherMap

public static Map<Checksum.Algorithm,Checksum.Hasher> newHasherMap(Checksum.Algorithm[] algorithms)
                                                            throws MinioException

Creates hasher map for the specified algorithms.

Throws:

MinioException

update

public static void update(Map<Checksum.Algorithm,Checksum.Hasher> hashers,
 byte[] data,
 int length)

Updates each hasher using the specified array of bytes, ending at the specified length.

update

public static void update(Map<Checksum.Algorithm,Checksum.Hasher> hashers,
 RandomAccessFile file,
 long size)
                   throws MinioException

Updates each hasher using the specified file, ending at the specified size.

Throws:

MinioException

update

public static void update(Map<Checksum.Algorithm,Checksum.Hasher> hashers,
 ByteBuffer buffer)
                   throws MinioException

Updates each hasher using the specified byte buffer.

Throws:

MinioException

makeHeaders

public static Http.Headers makeHeaders(Map<Checksum.Algorithm,Checksum.Hasher> hashers,
 boolean addContentSha256,
 boolean addSha256Checksum)

Makes checksum headers for given hashers.