зеркало из https://github.com/mozilla/gecko-dev.git
bug 133216 - make multibyte decoder more robust for invalid octet sequence.
r=yokoyama, sr=alecf, a=asa
This commit is contained in:
jshin%mailaps.org
Родитель
f1e67b79cd
Коммит
e5d04772a8
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@ -450,12 +450,20 @@ PRIVATE PRBool uCheckAndScanAlways2ByteShiftGR(
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PRUint32* inscanlen
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)
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{
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/*
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*Both bytes should be in the range of [0xa1,0xfe] for 94x94 character sets
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* invoked on GR. No encoding implemented in Mozilla uses 96x96 char. sets.
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*/
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if(inbuflen < 2 || ! CHK_GR94_2Byte(in[1],in[0]))
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/*
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* Both bytes should be in the range of [0xa1,0xfe] for 94x94 character sets
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* invoked on GR. No encoding implemented in Mozilla uses 96x96 char. sets.
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* Only 2nd byte range needs to be checked because
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* 1st byte is checked before calling this in nsUnicodeDecoerHelper.cpp
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*/
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if(inbuflen < 2) /* will lead to NS_OK_UDEC_MOREINPUT */
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return PR_FALSE;
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else if (! CHK_GR94(in[1]))
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{
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*inscanlen = 2;
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*out = 0xFF; /* for 2-byte table, uMap() is guaranteed to fail for 0xFF. */
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return PR_TRUE;
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}
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else
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{
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*inscanlen = 2;
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@ -479,9 +487,17 @@ PRIVATE PRBool uCheckAndScanAlways2ByteGR128(
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* The first byte should be in [0xa1,0xfe]
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* and the second byte can take any value with MSB = 1.
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* Used by CP949 -> Unicode converter.
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* Only 2nd byte range needs to be checked because
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* 1st byte is checked before calling this in nsUnicodeDecoerHelper.cpp
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*/
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if(inbuflen < 2 || ! CHK_GR94(in[0]) || ! in[1] & 0x80 )
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if(inbuflen < 2) /* will lead to NS_OK_UDEC_MOREINPUT */
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return PR_FALSE;
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else if (! in[1] & 0x80) /* 2nd byte range check */
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{
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*inscanlen = 2;
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*out = 0xFF; /* for 2-byte table, uMap() is guaranteed to fail for 0xFF. */
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return PR_TRUE;
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}
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else
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{
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*inscanlen = 2;
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@ -532,8 +548,20 @@ PRIVATE PRBool uCheckAndScan2ByteGRPrefix8F(
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PRUint32* inscanlen
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)
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{
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if((inbuflen < 3) ||(in[0] != 0x8F) || ! CHK_GR94_2Byte(in[1],in[2]))
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if((inbuflen < 3) ||(in[0] != 0x8F))
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return PR_FALSE;
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else if (! CHK_GR94(in[1])) /* 2nd byte range check */
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{
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*inscanlen = 2;
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*out = 0xFF; /* for 2-byte table, uMap() is guaranteed to fail for 0xFF. */
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return PR_TRUE;
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}
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else if (! CHK_GR94(in[2])) /* 3rd byte range check */
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{
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*inscanlen = 3;
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*out = 0xFF; /* for 2-byte table, uMap() is guaranteed to fail for 0xFF. */
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return PR_TRUE;
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}
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else
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{
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*inscanlen = 3;
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@ -544,6 +572,38 @@ PRIVATE PRBool uCheckAndScan2ByteGRPrefix8F(
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/*=================================================================================
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=================================================================================*/
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/* Macro definition to use for uCheckAndScan2ByteGRPrefix8EAX()
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* where X is 2,3,4,5,6,7
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*/
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#define CNS_8EAX_4BYTE(PREFIX) \
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if((inbuflen < 4) || (in[0] != 0x8E)) \
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return PR_FALSE; \
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else if((in[1] != (PREFIX))) \
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{ \
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*inscanlen = 2; \
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*out = 0xFF; \
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return PR_TRUE; \
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} \
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else if(! CHK_GR94(in[2])) \
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{ \
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*inscanlen = 3; \
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*out = 0xFF; \
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return PR_TRUE; \
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} \
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else if(! CHK_GR94(in[3])) \
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{ \
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*inscanlen = 4; \
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*out = 0xFF; \
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return PR_TRUE; \
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} \
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else \
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{ \
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*inscanlen = 4; \
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*out = (((in[2] << 8) | ( in[3])) & 0x7F7F); \
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return PR_TRUE; \
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}
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PRIVATE PRBool uCheckAndScan2ByteGRPrefix8EA2(
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uShiftTable *shift,
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PRInt32* state,
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@ -553,14 +613,7 @@ PRIVATE PRBool uCheckAndScan2ByteGRPrefix8EA2(
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PRUint32* inscanlen
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)
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{
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if((inbuflen < 4) || (in[0] != 0x8E) || (in[1] != 0xA2) || ! CHK_GR94_2Byte(in[2],in[3]))
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return PR_FALSE;
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else
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{
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*inscanlen = 4;
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*out = (((in[2] << 8) | ( in[3])) & 0x7F7F);
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return PR_TRUE;
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}
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CNS_8EAX_4BYTE(0xA2)
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}
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/*=================================================================================
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@ -645,14 +698,7 @@ PRIVATE PRBool uCheckAndScan2ByteGRPrefix8EA3(
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PRUint32* inscanlen
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)
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{
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if((inbuflen < 4) || (in[0] != 0x8E) || (in[1] != 0xA3) || ! CHK_GR94_2Byte(in[2],in[3]))
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return PR_FALSE;
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else
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{
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*inscanlen = 4;
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*out = (((in[2] << 8) | ( in[3])) & 0x7F7F);
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return PR_TRUE;
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}
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CNS_8EAX_4BYTE(0xA3)
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}
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/*=================================================================================
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@ -666,14 +712,7 @@ PRIVATE PRBool uCheckAndScan2ByteGRPrefix8EA4(
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PRUint32* inscanlen
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)
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{
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if((inbuflen < 4) || (in[0] != 0x8E) || (in[1] != 0xA4) || ! CHK_GR94_2Byte(in[2],in[3]))
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return PR_FALSE;
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else
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{
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*inscanlen = 4;
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*out = (((in[2] << 8) | ( in[3])) & 0x7F7F);
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return PR_TRUE;
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}
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CNS_8EAX_4BYTE(0xA4)
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}
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/*=================================================================================
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@ -687,14 +726,7 @@ PRIVATE PRBool uCheckAndScan2ByteGRPrefix8EA5(
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PRUint32* inscanlen
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)
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{
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if((inbuflen < 4) || (in[0] != 0x8E) || (in[1] != 0xA5) || ! CHK_GR94_2Byte(in[2],in[3]))
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return PR_FALSE;
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else
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{
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*inscanlen = 4;
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*out = (((in[2] << 8) | ( in[3])) & 0x7F7F);
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return PR_TRUE;
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}
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CNS_8EAX_4BYTE(0xA5)
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}
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/*=================================================================================
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@ -708,14 +740,7 @@ PRIVATE PRBool uCheckAndScan2ByteGRPrefix8EA6(
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PRUint32* inscanlen
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)
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{
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if((inbuflen < 4) || (in[0] != 0x8E) || (in[1] != 0xA6) || ! CHK_GR94_2Byte(in[2],in[3]))
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return PR_FALSE;
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else
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{
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*inscanlen = 4;
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*out = (((in[2] << 8) | ( in[3])) & 0x7F7F);
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return PR_TRUE;
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}
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CNS_8EAX_4BYTE(0xA6)
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}
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/*=================================================================================
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@ -729,14 +754,7 @@ PRIVATE PRBool uCheckAndScan2ByteGRPrefix8EA7(
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PRUint32* inscanlen
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)
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{
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if((inbuflen < 4) || (in[0] != 0x8E) || (in[1] != 0xA7) || ! CHK_GR94_2Byte(in[2],in[3]))
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return PR_FALSE;
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else
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{
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*inscanlen = 4;
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*out = (((in[2] << 8) | ( in[3])) & 0x7F7F);
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return PR_TRUE;
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}
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CNS_8EAX_4BYTE(0xA7)
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}
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/*=================================================================================
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