JavaTM 2 Platform
Standard Ed. 5.0

javax.crypto
Ŭ·¡½º CipherInputStream

java.lang.Object 
  »óÀ§¸¦ È®Àå java.io.InputStream 
      »óÀ§¸¦ È®Àå java.io.FilterInputStream 
          »óÀ§¸¦ È®Àå javax.crypto.CipherInputStream
¸ðµç ±¸ÇöµÈ ÀÎÅÍÆäÀ̽º:
Closeable

public class CipherInputStream
extends FilterInputStream

CipherInputStream´Â InputStream¿Í Cipher ·Î ±¸¼ºµÇ¾î ÀÖÀ¸¹Ç·Î read() ¸Þ¼­µå´Â ±âº»ÀÌ µÇ´Â InputStream ·ÎºÎÅÍ ÀÐÈù µ¥ÀÌÅ͸¦ ¸®ÅÏÇÕ´Ï´Ù¸¸, Cipher¿¡ ÀÇÇØ Ãß°¡ÀÇ Ã³¸®¸¦ ÇÏ°í ÀÖ½À´Ï´Ù. Cipher´Â ¿ÏÀüÇÏ°Ô ÃʱâÈ­ÇÏÁö ¾ÊÀ¸¸é, CipherInputStream ·Î »ç¿ëÇÒ ¼ö ¾ø½À´Ï´Ù.

¿¹¸¦ µé¾î Cipher°¡ º¹È£È­¿ëÀ¸·Î ÃʱâÈ­µÇ°í ÀÖÀ¸¸é, CipherInputStream´Â º¹È£È­ µÈ µ¥ÀÌÅ͸¦ µ¹·ÁÁÖ±â Àü¿¡ µ¥ÀÌÅ͸¦ Àб⠺¹È£È­ ÇÏ·Á°í ÇÕ´Ï´Ù.

ÀÌ Å¬·¡½º´Â »óÀ§ Ŭ·¡½º java.io.FilterInputStream ¹× java.io.InputStream ½Ã¸àƽ½º, ƯÈ÷ ½ÇÆÐ ½Ã¸àƽ½º¿¡ ¾ö¹ÐÇÏ°Ô µû¸¨´Ï´Ù. ÀÌ Å¬·¡½º¿¡¼­´Â ±×·¯ÇÑ ¸Þ¼­µå´Â »óÀ§ Ŭ·¡½º¿¡¼­ ¾ö¹ÐÇÏ°Ô ÁöÁ¤µÇ°í ÀÖ¾î ¸ðµÎ ¿À¹ö¶óÀ̵å(override) µË´Ï´Ù. °Ô´Ù°¡ ÀÌ Å¬·¡½º´Â »óÀ§ Ŭ·¡½º¿¡¼­ Throw µÇÁö ¾Ê´Â ¸ðµç ¿¹¿Ü¸¦ ijġ ÇÕ´Ï´Ù. ƯÈ÷, skip ¸Þ¼­µå´Â ½ºÅµÀ» ½Ç½ÃÇØ, available ¸Þ¼­µå´Â ĸ½¶È­µÈ Cipher¿¡ ÀÇÇØ Ã³¸®µÈ µ¥ÀÌÅ͸¸À» Ä«¿îÆ® ÇÕ´Ï´Ù.

ÀÌ Å¬·¡½º¸¦ »ç¿ëÇÏ´Â ÇÁ·Î±×·¡¸Ó´Â ÀÌ Å¬·¡½º¿¡¼­ Á¤ÀǵǾî ÀÖÁö ¾ÊÀº ¸Þ¼­µå, ¶Ç´Â ¿À¹ö¶óÀ̵å(override)µÇ¾î ÀÖÁö ¾ÊÀº ¸Þ¼­µå (»õ·Î¿î ¸Þ¼­µå³ª, ³ªÁß¿¡ ½´ÆÛ Å¬·¡½ºÀÇ 1°³¿¡ Ãß°¡µÇ´Â »ý¼ºÀÚ µî)¸¦ Àý´ë·Î »ç¿ëÇÏÁö ¸»¾Æ ÁÖ¼¼¿ä. ±×·¯ÇÑ ¸Þ¼­µåÀÇ ¼³°è¿Í ±¸Çö¿¡¼­´Â CipherInputStream¿¡ °üÇÑ º¸¾È»óÀÇ ¿µÇâÀÌ °í·ÁµÇ¾î ÀÖÁö ¾ÊÀ» °¡´É¼ºÀÌ Àֱ⠶§¹®¿¡ÀÔ´Ï´Ù.

µµÀÔµÈ ¹öÀü :
1.4
°ü·Ã Ç׸ñ:
InputStream, FilterInputStream, Cipher, CipherOutputStream

ÇÊµå °³¿ä
 
Ŭ·¡½º java.io. FilterInputStream ·ÎºÎÅÍ »ó¼ÓµÈ Çʵå
in
 
»ý¼ºÀÚ °³¿ä
protected CipherInputStream (InputStream  is)
          InputStream ·ÎºÎÅÍ Cipher¸¦ ÁöÁ¤ÇÏÁö ¾Ê°í CipherInputStream¸¦ ±¸ÃàÇÕ´Ï´Ù.
  CipherInputStream (InputStream  is, Cipher  c)
          InputStream ¹× Cipher ·ÎºÎÅÍ CipherInputStream¸¦ ±¸ÃàÇÕ´Ï´Ù.
 
¸Þ¼­µå °³¿ä
 int available ()
          ºí·Ï ÇÏÁö ¾Ê°í ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ ÀоîµéÀÏ ¼ö ÀÖ´Â ¹ÙÀÌÆ®¼ö¸¦ ¸®ÅÏÇÕ´Ï´Ù.
 void close ()
          ÀÌ ÀÔ·Â ½ºÆ®¸²À» ´Ý¾Æ, ±× ½ºÆ®¸²¿¡ °ü·ÃµÈ ¸ðµç system resource¸¦ ÇعæÇÕ´Ï´Ù.
 boolean markSupported ()
          ÀÌ ÀÔ·Â ½ºÆ®¸²ÀÌ, mark ¸Þ¼­µå¿Í reset ¸Þ¼­µå¸¦ Áö¿ø ÇÏ°í ÀÖÀ»Áö ¾î¶³Áö¸¦ ÆÇÁ¤ÇÕ´Ï´Ù.
 int read ()
          ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ, µ¥ÀÌÅÍÀÇ ´ÙÀ½ÀÇ ¹ÙÀÌÆ®¸¦ ÀоîµéÀÔ´Ï´Ù.
 int read (byte[] b)
          ÃÖ´ë b.length ¹ÙÀÌÆ®±îÁöÀÇ µ¥ÀÌÅ͸¦, ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ ¹ÙÀÌÆ® ¹è¿­¿¡ ÀоîµéÀÔ´Ï´Ù.
 int read (byte[] b, int off, int len)
          ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ len ¹ÙÀÌÆ®±îÁöÀÇ µ¥ÀÌÅ͸¦ ¹ÙÀÌÆ®ÀÇ ¹è¿­¿¡ ÀоîµéÀÔ´Ï´Ù.
 long skip (long n)
          ºí·Ï ÇÏÁö ¾Ê°í ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ ÀоîµéÀÏ ¼ö ÀÖ´Â ¹ÙÀÌÆ®·ÎºÎÅÍ n ¹ÙÀÌÆ®ÀÇ ÀÔ·ÂÀ» ½ºÅµ ÇÕ´Ï´Ù.
 
Ŭ·¡½º java.io. FilterInputStream ·ÎºÎÅÍ »ó¼ÓµÈ ¸Þ¼­µå
mark, reset
 
Ŭ·¡½º java.lang. Object ·ÎºÎÅÍ »ó¼ÓµÈ ¸Þ¼­µå
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

»ý¼ºÀÚ »ó¼¼

CipherInputStream

public CipherInputStream(InputStream  is,
                         Cipher  c)
InputStream ¹× Cipher ·ÎºÎÅÍ CipherInputStream¸¦ ±¸ÃàÇÕ´Ï´Ù.
ÁÖ: ÁöÁ¤µÈ ÀÔ·Â ½ºÆ®¸² ¶Ç´Â ¾ÏÈ£°¡ nullÀÎ °æ¿ì, ³ªÁß¿¡ À̰͵éÀ» »ç¿ëÇÒ °æ¿ì¿¡ NullPointerException°¡ ¹ß»ýµÇ´Â ÀÏÀÌ ÀÖ½À´Ï´Ù.

ÆĶó¹ÌÅÍ:
is - 󸮵Ǵ ÀÔ·Â ½ºÆ®¸²
c - ÃʱâÈ­µÈ Cipher °´Ã¼

CipherInputStream

protected CipherInputStream(InputStream  is)
InputStream ·ÎºÎÅÍ Cipher¸¦ ÁöÁ¤ÇÏÁö ¾Ê°í CipherInputStream¸¦ ±¸ÃàÇÕ´Ï´Ù. ÀÌ°ÍÀº NullCipher¸¦ »ç¿ëÇØ CipherInputStream¸¦ ±¸ÃàÇÏ´Â È¿°ú¸¦ °¡Áý´Ï´Ù.
ÁÖ: ÁöÁ¤µÈ ÀÔ·Â ½ºÆ®¸²ÀÌ nullÀÎ °æ¿ì, ³ªÁß¿¡ ±×°ÍÀ» »ç¿ëÇÒ °æ¿ì¿¡ NullPointerException°¡ ¹ß»ýµÇ´Â ÀÏÀÌ ÀÖ½À´Ï´Ù.

ÆĶó¹ÌÅÍ:
is - 󸮵Ǵ ÀÔ·Â ½ºÆ®¸²
¸Þ¼­µåÀÇ »ó¼¼

read

public int read()
         throws IOException 
ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ, µ¥ÀÌÅÍÀÇ ´ÙÀ½ÀÇ ¹ÙÀÌÆ®¸¦ ÀоîµéÀÔ´Ï´Ù. ±× ¹ÙÀÌÆ®´Â 0 ~ 255 ¹üÀ§ÀÇ int·Î ¼­ ¸®Åϵ˴ϴ٠. ½ºÆ®¸²ÀÇ ¸¶Áö¸·¿¡ À̸£·¯ ¹ÙÀÌÆ®°¡ ¾ø´Â °æ¿ì´Â °ª -1 ÀÌ ¸®Åϵ˴ϴ٠. ÀÌ ¸Þ¼­µå´Â ÀÔ·Â µ¥ÀÌÅÍ°¡ ÀÐÈ÷°Ô µÇ´ÂÁö, ½ºÆ®¸²ÀÇ ¸¶Áö¸·ÀÌ °ËÃâµÇ´ÂÁö, ¶Ç´Â ¿¹¿Ü°¡ Throw µÉ ¶§±îÁö ºí·Ï ÇÕ´Ï´Ù.

¿À¹ö¶óÀ̵å(override):
Ŭ·¡½º FilterInputStream ³»ÀÇ read
¹Ýȯ°ª:
µ¥ÀÌÅÍÀÇ ´ÙÀ½ÀÇ ¹ÙÀÌÆ®. ½ºÆ®¸²ÀÇ ¸¶Áö¸·¿¡ À̸£·¶À» °æ¿ì´Â -1
¿¹¿Ü:
IOException - ÀÔÃâ·Â ¿¡·¯°¡ ¹ß»ýÇßÀ» °æ¿ì
µµÀÔµÈ ¹öÀü :
JCE1. 2
°ü·Ã Ç׸ñ:
FilterInputStream.in

read

public int read(byte[] b)
         throws IOException 
ÃÖ´ë b.length ¹ÙÀÌÆ®±îÁöÀÇ µ¥ÀÌÅ͸¦, ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ ¹ÙÀÌÆ® ¹è¿­¿¡ ÀоîµéÀÔ´Ï´Ù.

InputStream read ¸Þ¼­µå´Â Àμö b, 0 ¹× b.length¸¦ ÁöÁ¤ÇØ 3°³ÀÇ Àμö¸¦ ÃëÇÏ´Â read ¸Þ¼­µå¸¦ È£ÃâÇÕ´Ï´Ù.

¿À¹ö¶óÀ̵å(override):
Ŭ·¡½º FilterInputStream ³»ÀÇ read
ÆĶó¹ÌÅÍ:
b - µ¥ÀÌÅÍÀÇ readóÀÇ ¹öÆÛ
¹Ýȯ°ª:
¹öÆÛ¿¡ ÀÐÈù ¹ÙÀÌÆ®ÀÇ ÇÕ°è¼ö. ½ºÆ®¸²ÀÇ ¸¶Áö¸·¿¡ À̸£·¯ µ¥ÀÌÅÍ°¡ ¾ø´Â °æ¿ì´Â -1
¿¹¿Ü:
IOException - ÀÔÃâ·Â ¿¡·¯°¡ ¹ß»ýÇßÀ» °æ¿ì
µµÀÔµÈ ¹öÀü :
JCE1. 2
°ü·Ã Ç׸ñ:
InputStream.read(byte[], int, int)

read

public int read(byte[] b,
                int off,
                int len)
         throws IOException 
ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ len ¹ÙÀÌÆ®±îÁöÀÇ µ¥ÀÌÅ͸¦ ¹ÙÀÌÆ®ÀÇ ¹è¿­¿¡ ÀоîµéÀÔ´Ï´Ù. ÀÌ ¸Þ¼­µå´Â ÀϺÎÀÇ ÀÔ·Â µ¥ÀÌÅ͸¦ ¾òÀ» ¼ö ÀÖ°Ô µÉ ¶§±îÁö ºí·Ï ÇÕ´Ï´Ù. ÃÖÃÊÀÇ Àμö°¡ nullÀÎ °æ¿ì´Â len ±îÁöÀÇ ¹ÙÀÌÆ®°¡ ÀÐÈù µÚ Æó±âµË´Ï´Ù.

¿À¹ö¶óÀ̵å(override):
Ŭ·¡½º FilterInputStream ³»ÀÇ read
ÆĶó¹ÌÅÍ:
b - µ¥ÀÌÅÍÀÇ readóÀÇ ¹öÆÛ
off - µ¥ÀÌÅÍÀÇ °³½Ã ¿ÀÇÁ¼Â(offset)
len - ÀÐÈ÷´Â ÃÖ´ë ¹ÙÀÌÆ®¼ö
¹Ýȯ°ª:
¹öÆÛ¿¡ ÀÐÈù ¹ÙÀÌÆ®ÀÇ ÇÕ°è¼ö. ½ºÆ®¸²ÀÇ ¸¶Áö¸·¿¡ À̸£·¯ µ¥ÀÌÅÍ°¡ ¾ø´Â °æ¿ì´Â -1
¿¹¿Ü:
IOException - ÀÔÃâ·Â ¿¡·¯°¡ ¹ß»ýÇßÀ» °æ¿ì
µµÀÔµÈ ¹öÀü :
JCE1. 2
°ü·Ã Ç׸ñ:
InputStream.read()

skip

public long skip(long n)
          throws IOException 
ºí·Ï ÇÏÁö ¾Ê°í ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ ÀоîµéÀÏ ¼ö ÀÖ´Â ¹ÙÀÌÆ®·ÎºÎÅÍ n ¹ÙÀÌÆ®ÀÇ ÀÔ·ÂÀ» ½ºÅµ ÇÕ´Ï´Ù.

½ºÅµ µÇ´Â ¹ÙÀÌÆ®°¡ ¿ä±¸µÈ ¹ÙÀÌÆ®º¸´Ù ÀûÀº °æ¿ì°¡ ÀÖ½À´Ï´Ù. ½ÇÁ¦·Î ½ºÅµ µÈ ¹ÙÀÌÆ®¼ö´Â n ¶Ç´Â available¸¦ È£ÃâÇÑ °á°úÀÇ ÃÄ ÀÛÀº (ºÐ)ºôÆ®ÀδϴÙ. n°¡ Á¦·Îº¸´Ù ÀÛÀº °æ¿ì, ¹ÙÀÌÆ®´Â ½ºÅµ µÇÁö ¾Ê½À´Ï´Ù.

½ÇÁ¦·Î ½ºÅµ µÈ ¹ÙÀÌÆ®¼ö°¡ ¸®Åϵ˴ϴ٠.

¿À¹ö¶óÀ̵å(override):
Ŭ·¡½º FilterInputStream ³»ÀÇ skip
ÆĶó¹ÌÅÍ:
n - ½ºÅµ ÇÏ´Â ¹ÙÀÌÆ®¼ö
¹Ýȯ°ª:
½ÇÁ¦·Î ½ºÅµ µÈ ¹ÙÀÌÆ®¼ö
¿¹¿Ü:
IOException - ÀÔÃâ·Â ¿¡·¯°¡ ¹ß»ýÇßÀ» °æ¿ì
µµÀÔµÈ ¹öÀü :
JCE1. 2

available

public int available()
              throws IOException 
ºí·Ï ÇÏÁö ¾Ê°í ÀÌ ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ ÀоîµéÀÏ ¼ö ÀÖ´Â ¹ÙÀÌÆ®¼ö¸¦ ¸®ÅÏÇÕ´Ï´Ù. InputStream available ¸Þ¼­µå´Â 0À» ¸®ÅÏÇÕ´Ï´Ù. ÀÌ ¸Þ¼­µå´Â ¼­ºê Ŭ·¡½º¿¡¼­ ¿À¹ö¶óÀ̵å(override) ÇÒÇÊ¿ä°¡ ÀÖ½À´Ï´Ù.

¿À¹ö¶óÀ̵å(override):
Ŭ·¡½º FilterInputStream ³»ÀÇ available
¹Ýȯ°ª:
ºí·Ï ÇÏÁö ¾Ê°í ÀÔ·Â ½ºÆ®¸²·ÎºÎÅÍ ÀоîµéÀÏ ¼ö ÀÖ´Â ¹ÙÀÌÆ®¼ö
¿¹¿Ü:
IOException - ÀÔÃâ·Â ¿¡·¯°¡ ¹ß»ýÇßÀ» °æ¿ì
µµÀÔµÈ ¹öÀü :
JCE1. 2
°ü·Ã Ç׸ñ:
FilterInputStream.in

close

public void close()
           throws IOException 
ÀÌ ÀÔ·Â ½ºÆ®¸²À» ´Ý¾Æ, ±× ½ºÆ®¸²¿¡ °ü·ÃµÈ ¸ðµç system resource¸¦ ÇعæÇÕ´Ï´Ù.

CipherInputStream close ¸Þ¼­µå°¡ ±âº»ÀÌ µÇ´Â ÀÔ·Â ½ºÆ®¸²ÀÇ close ¸Þ¼­µå¸¦ È£ÃâÇÕ´Ï´Ù.

Á¤ÀÇ:
ÀÎÅÍÆäÀ̽º Closeable ³»ÀÇ close
¿À¹ö¶óÀ̵å(override):
Ŭ·¡½º FilterInputStream ³»ÀÇ close
¿¹¿Ü:
IOException - ÀÔÃâ·Â ¿¡·¯°¡ ¹ß»ýÇßÀ» °æ¿ì
µµÀÔµÈ ¹öÀü :
JCE1. 2
°ü·Ã Ç׸ñ:
FilterInputStream.in

markSupported

public boolean markSupported()
ÀÌ ÀÔ·Â ½ºÆ®¸²ÀÌ, mark ¸Þ¼­µå¿Í reset ¸Þ¼­µå¸¦ Áö¿ø ÇÏ°í ÀÖÀ»Áö ¾î¶³Áö¸¦ ÆÇÁ¤ÇÕ´Ï´Ù. ÀÌ·¯ÇÑ ¸Þ¼­µå´Â Áö¿ø µÇÁö ¾Ê½À´Ï´Ù.

¿À¹ö¶óÀ̵å(override):
Ŭ·¡½º FilterInputStream ³»ÀÇ markSupported
¹Ýȯ°ª:
ÀÌ Å¬·¡½º´Â mark ¸Þ¼­µå¿Í reset ¸Þ¼­µå¸¦ Áö¿ø ÇÏ°í ÀÖÁö ¾Ê¾Ò±â ¶§¹®¿¡ false
µµÀÔµÈ ¹öÀü :
JCE1. 2
°ü·Ã Ç׸ñ:
InputStream.mark(int), InputStream.reset()

JavaTM 2 Platform
Standard Ed. 5.0

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