JavaTM 2 Platform
Standard Ed. 5.0

java.security
Ŭ·¡½º MessageDigestSpi

java.lang.Object 
  »óÀ§¸¦ È®Àå java.security.MessageDigestSpi
¾Ë·ÁÁø Á÷°è ¼­ºê Ŭ·¡½º:
MessageDigest

public abstract class MessageDigestSpi
extends Object

MessageDigest Ŭ·¡½ºÀÇ Service Provider Interface (SPI)¸¦ Á¤ÀÇÇÕ´Ï´Ù. ÀÌ°ÍÀº MD5 ³ª SHA ¶ó°í ÇÏ´Â ¸Þ¼¼Áö ´ÙÀÌÁ¦½ºÆ® ¾Ë°í¸®ÁòÀÇ ±â´ÉÀ» Á¦°øÇÕ´Ï´Ù. ¸Þ¼¼Áö ´ÙÀÌÁ¦½ºÆ®´Â ÀÓÀÇ »çÀÌÁîÀÇ µ¥ÀÌÅ͸¦ ÃëµæÇØ °íÁ¤ÀåÀÇ ÇؽÃÄ¡¸¦ Ãâ·ÂÇÏ´Â ¾ÈÀüÇÑ ÇѹæÇâÀÇ Çؽà ±â´ÉÀÔ´Ï´Ù.

ÀÌ Å¬·¡½ºÀÇ ¸ðµç Ãß»ó ¸Þ¼­µå´Â ƯÁ¤ÀÇ ¸Þ¼¼Áö ´ÙÀÌÁ¦½ºÆ® ¾Ë°í¸®ÁòÀÇ ±¸ÇöÀ» °ø±ÞÇÏ·Á°í ÇÏ´Â ¾Ïȣȭ ¼­ºñ½º ÇÁ·Î¹ÙÀÌ´õ¿¡ ÀÇÇØ ±¸ÇöµÇÁö ¾ÊÀ¸¸é ¾ÈµË´Ï´Ù.

Cloneable ÀÎÅÍÆäÀ̽º´Â ÀÚÀ¯·Ó°Ô ±¸ÇöÇÒ ¼ö ÀÖ½À´Ï´Ù.

°ü·Ã Ç׸ñ:
MessageDigest

»ý¼ºÀÚ °³¿ä
MessageDigestSpi ()
           
 
¸Þ¼­µå °³¿ä
 Object clone ()
          ±¸ÇöÀÌ º¹Á¦ °¡´ÉÇÑ °æ¿ì´Â º¹Á¦¸¦ ¸®ÅÏÇÕ´Ï´Ù.
protected abstract  byte[] engineDigest ()
          ÆеùµîÀÇ ÃÖÁ¾ 󸮸¦ ÇàÇØ Çؽà °è»êÀ» ¿Ï·áÇÕ´Ï´Ù.
protected  int engineDigest (byte[] buf, int offset, int len)
          ÆеùµîÀÇ ÃÖÁ¾ 󸮸¦ ÇàÇØ Çؽà °è»êÀ» ¿Ï·áÇÕ´Ï´Ù.
protected  int engineGetDigestLength ()
          ¹ÙÀÌÆ® ´ÜÀ§ÀÇ ´ÙÀÌÁ¦½ºÆ®ÀåÀ» ¸®ÅÏÇÕ´Ï´Ù.
protected abstract  void engineReset ()
          ÀçÀÌ¿ëÀ» À§Çؼ­ ´ÙÀÌÁ¦½ºÆ®¸¦ ¸®¼Â ÇÕ´Ï´Ù.
protected abstract  void engineUpdate (byte input)
          ÁöÁ¤µÈ ¹ÙÀÌÆ® µ¥ÀÌÅ͸¦ »ç¿ëÇØ ´ÙÀÌÁ¦½ºÆ®¸¦ °»½ÅÇÕ´Ï´Ù.
protected abstract  void engineUpdate (byte[] input, int offset, int len)
          ÁöÁ¤µÈ ¹ÙÀÌÆ® µ¥ÀÌÅÍÀÇ ¹è¿­À» »ç¿ëÇØ, ÁöÁ¤µÈ ¿ÀÇÁ¼Â(offset)·ÎºÎÅÍ °³½ÃÇØ ´ÙÀÌÁ¦½ºÆ®¸¦ °»½ÅÇÕ´Ï´Ù.
protected  void engineUpdate (ByteBuffer  input)
          ÁöÁ¤µÈ ByteBuffer¸¦ »ç¿ëÇØ ´ÙÀÌÁ¦½ºÆ®¸¦ °»½ÅÇÕ´Ï´Ù.
 
Ŭ·¡½º java.lang. Object ·ÎºÎÅÍ »ó¼ÓµÈ ¸Þ¼­µå
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

»ý¼ºÀÚ »ó¼¼

MessageDigestSpi

public MessageDigestSpi()
¸Þ¼­µåÀÇ »ó¼¼

engineGetDigestLength

protected int engineGetDigestLength()
¹ÙÀÌÆ® ´ÜÀ§ÀÇ ´ÙÀÌÁ¦½ºÆ®ÀåÀ» ¸®ÅÏÇÕ´Ï´Ù.

ÀÌ ±¸»ó ¸Þ¼­µå´Â ÀÌ Á¤ÀÇ ³¡³­ Ãß»ó Ŭ·¡½º¿¡ Ãß°¡µÇ°í ÀÖ½À´Ï´Ù (ÇÏÀ§ ȣȯÀ̱⠶§¹®¿¡ Ãß»ó ¸Þ¼­µå·Î´Â µÉ ¼ö ¾ø´Ù).

µðÆúÆ® µ¿ÀÛÀº 0À» ¸®ÅÏÇÕ´Ï´Ù.

ÀÌ ¸Þ¼­µå´Â ÇÁ·Î¹ÙÀÌ´õ¿¡ ÀÇÇØ ¿À¹ö¶óÀ̵å(override) µÇ¸é, ´ÙÀÌÁ¦½ºÆ®ÀåÀ» ¸®ÅÏÇÕ´Ï´Ù.

¹Ýȯ°ª:
¹ÙÀÌÆ® ´ÜÀ§ÀÇ ´ÙÀÌÁ¦½ºÆ®Àå
µµÀÔµÈ ¹öÀü :
1.2

engineUpdate

protected abstract void engineUpdate(byte input)
ÁöÁ¤µÈ ¹ÙÀÌÆ® µ¥ÀÌÅ͸¦ »ç¿ëÇØ ´ÙÀÌÁ¦½ºÆ®¸¦ °»½ÅÇÕ´Ï´Ù.

ÆĶó¹ÌÅÍ:
input - °»½Å¿¡ »ç¿ëÇÏ´Â ¹ÙÀÌÆ®

engineUpdate

protected abstract void engineUpdate(byte[] input,
                                     int offset,
                                     int len)
ÁöÁ¤µÈ ¹ÙÀÌÆ® µ¥ÀÌÅÍÀÇ ¹è¿­À» »ç¿ëÇØ, ÁöÁ¤µÈ ¿ÀÇÁ¼Â(offset)·ÎºÎÅÍ °³½ÃÇØ ´ÙÀÌÁ¦½ºÆ®¸¦ °»½ÅÇÕ´Ï´Ù.

ÆĶó¹ÌÅÍ:
input - °»½Å¿¡ »ç¿ëÇÏ´Â ¹ÙÀÌÆ® µ¥ÀÌÅÍÀÇ ¹è¿­
offset - ¹ÙÀÌÆ®ÀÇ ¹è¿­¿¡¼­ÀÇ °³½Ã ¿ÀÇÁ¼Â(offset)
len - offset·Î ºÎÅÍ °³½ÃÇØ »ç¿ëµÇ´Â ¹ÙÀÌÆ®¼ö

engineUpdate

protected void engineUpdate(ByteBuffer  input)
ÁöÁ¤µÈ ByteBuffer¸¦ »ç¿ëÇØ ´ÙÀÌÁ¦½ºÆ®¸¦ °»½ÅÇÕ´Ï´Ù. ´ÙÀÌÁ¦½ºÆ®ÀÇ °»½Å½Ã¿¡´Â input.position() À§Ä¡·ÎºÎÅÍ ½ÃÀ۵Ǵ input.remaining() ¹ÙÀÌÆ®°¡ »ç¿ëµË´Ï´Ù. ¸®ÅϽÿ¡´Â ¹öÆÛÀÇ À§°ªÀÌ ¸®¹ÔÆ®¿Í µ¿ÀÏÇØÁý´Ï´Ù¸¸, ¸®¹ÔÆ®´Â º¯°æµÇÁö ¾Ê½À´Ï´Ù.

ÆĶó¹ÌÅÍ:
input - ByteBuffer
µµÀÔµÈ ¹öÀü :
1.5

engineDigest

protected abstract byte[] engineDigest()
ÆеùµîÀÇ ÃÖÁ¾ 󸮸¦ ÇàÇØ Çؽà °è»êÀ» ¿Ï·áÇÕ´Ï´Ù. engineDigest È£ÃâµÚ, ¿£ÁøÀº ¸®¼Â µË´Ï´Ù (engineReset¸¦ ÂüÁ¶). ¸®¼Â Á¶ÀÛÀº ¿£ÁøÀÇ ±¸ÇöÀÚ°¡ ´ã´çÇÕ´Ï´Ù.

¹Ýȯ°ª:
°è»êµÈ ÇؽÃÄ¡¿¡ ´ëÇÑ ¹ÙÀÌÆ® µ¥ÀÌÅÍÀÇ ¹è¿­

engineDigest

protected int engineDigest(byte[] buf,
                           int offset,
                           int len)
                    throws DigestException 
ÆеùµîÀÇ ÃÖÁ¾ 󸮸¦ ÇàÇØ Çؽà °è»êÀ» ¿Ï·áÇÕ´Ï´Ù. engineDigest È£ÃâµÚ, ¿£ÁøÀº ¸®¼Â µË´Ï´Ù (engineReset¸¦ ÂüÁ¶). ¸®¼Â Á¶ÀÛÀº ¿£ÁøÀÇ ±¸ÇöÀÚ°¡ ´ã´çÇÕ´Ï´Ù.ÀÌ ¸Þ¼­µå´Â Ãß»ó ¸Þ¼­µå°¡ ¾Æ´Ï¸é ¾ÈµË´Ï´Ù, binary level compatibility¸¦ À¯ÁöÇϱâ À§Çؼ­ ±¸»ó ¸Þ¼­µå´ë·ÎÀÇÇØ µÓ´Ï´Ù. ȣȯ¼ºÀ» ¹è·ÁÇÏ´Â ÇÁ·Î¹ÙÀÌ´õ´Â ÀÌ ¸Þ¼­µå¸¦ ¿À¹ö¶óÀ̵å(override)ÀÇÇØ ÁÖ¼¼¿ä.

ÆĶó¹ÌÅÍ:
buf - ´ÙÀÌÁ¦½ºÆ®¸¦ Æ÷ÇÔÇÏ´Â Ãâ·Â ¹öÆÛ
offset - Ãâ·Â ¹öÆÛÀÇ °³½Ã ¿ÀÇÁ¼Â(offset)
len - ´ÙÀÌÁ¦½ºÆ®¿¡ Ãæ´çµÇ´Â buf ³»ÀÇ ¹ÙÀÌÆ®Àå. ÀÌ µðÆúÆ® ±¸Çö°ú Sun ÇÁ·Î¹ÙÀÌ´õ´Â ¾î´ÀÂÊÀ̳ª ºÎºÐÀûÀÎ ´ÙÀÌÁ¦½ºÆ®¸¦ µ¹·ÁÁÖÁö ¾Ê´Â´Ù. ÀÌ ÆĶó¹ÌÅÍ´Â Java API¿¡ À־ÀÇ ÅëÀϼºÀ» À¯ÁöÇϱâ À§Çؼ­¸¸ Á¸ÀçÇÑ´Ù. ÀÌ ÆĶó¹ÌÅÍÀÇ °ªÀÌ ½ÇÁ¦ÀÇ ´ÙÀÌÁ¦½ºÆ®À庸´Ù ªÀº °æ¿ì, ¸Þ¼­µå´Â DigestExceptionÀ» Throw ÇÑ´Ù. ÀÌ ÆĶó¹ÌÅÍ´Â ±× °ªÀÌ ½ÇÁ¦ÀÇ ´ÙÀÌÁ¦½ºÆ®À庸´Ù ±äÁö, ȤÀº µ¿ÀÏÇÑ °æ¿ì´Â ¹«½ÃµÈ´Ù
¹Ýȯ°ª:
Ãâ·Â ¹öÆÛ¿¡ Æ÷ÇԵǴ ´ÙÀÌÁ¦½ºÆ®Àå
¿¹¿Ü:
DigestException - ¿¡·¯°¡ ¹ß»ýÇßÀ» °æ¿ì
µµÀÔµÈ ¹öÀü :
1.2

engineReset

protected abstract void engineReset()
ÀçÀÌ¿ëÀ» À§Çؼ­ ´ÙÀÌÁ¦½ºÆ®¸¦ ¸®¼Â ÇÕ´Ï´Ù.


clone

public Object  clone()
             throws CloneNotSupportedException 
±¸ÇöÀÌ º¹Á¦ °¡´ÉÇÑ °æ¿ì´Â º¹Á¦¸¦ ¸®ÅÏÇÕ´Ï´Ù.

¿À¹ö¶óÀ̵å(override):
Ŭ·¡½º Object ³»ÀÇ clone
¹Ýȯ°ª:
±¸ÇöÀÌ º¹Á¦ °¡´ÉÇÑ °æ¿ì´Â º¹Á¦
¿¹¿Ü:
CloneNotSupportedException - CloneableÀ» Áö¿ø ÇÏ°í ÀÖÁö ¾Ê´Â ±¸ÇöÀ¸·Î ºÒ·Á °¬À» °æ¿ì
°ü·Ã Ç׸ñ:
Cloneable

JavaTM 2 Platform
Standard Ed. 5.0

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