Binary compatibility report for the libdkim library between 1.0.17 and 1.0.19 versions on x86

Test Info

Library Name	libdkim
Version #1	1.0.17
Version #2	1.0.19
CPU Type	x86
GCC Version	4.6.1

Test Results

Total Header Files	7
Total Shared Libraries	1
Total Symbols / Types	75 / 146
Verdict	Incompatible (47.3%)

Problem Summary

	Severity	Count
Added Symbols	-	4
Removed Symbols	High	4
Problems with Data Types	High	2
	Medium	4
	Low	2
Problems with Symbols	High	4
	Medium	0
	Low	0
Problems with Constants	Low	0

Added Symbols (4)

dkimbase.h, libdkim.so
CDKIMBase::Process ( char* szBuffer, int nBufLength, bool bEOF )
CDKIMBase::ProcessBody ( char* szBuffer, int nBufLength, bool bEOF )

dkimsign.h, libdkim.so
CDKIMSign::ProcessBody ( char* szBuffer, int nBufLength, bool bEOF )

dkimverify.h, libdkim.so
CDKIMVerify::ProcessBody ( char* szBuffer, int nBufLength, bool bEOF )

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Removed Symbols (4)

dkimbase.h, libdkim.so
CDKIMBase::Process ( char* szBuffer, int nBufLength )
CDKIMBase::ProcessBody ( char* szBuffer, int nBufLength )

dkimsign.h, libdkim.so
CDKIMSign::ProcessBody ( char* szBuffer, int nBufLength )

dkimverify.h, libdkim.so
CDKIMVerify::ProcessBody ( char* szBuffer, int nBufLength )

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Problems with Data Types, High Severity (2)

	Change	Effect
1	Field m_EmptyLineCount has been removed from the middle position of this structural type.	1) Previous accesses of applications to the removed field will be incorrect. 2) Layout of structure fields has been changed and therefore fields at higher positions of the structure definition may be incorrectly accessed by applications.

	Change	Effect
1	Size of this class has been increased from 136 bytes to 140 bytes.	1) An object of this class can be allocated by the applications and old size will be hardcoded at the compile time. Call of any exported constructor will break the memory of neighbouring objects on the stack or heap. 2) The memory layout and size of subclasses will be changed.

dkimbase.h
[+] class CDKIMBase (1)

dkimverify.h
[+] class SignatureInfo (1)

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Problems with Symbols, High Severity (4)

	Change	Effect
1	Parameters list has been changed.	The name of the appropriate symbol for this function on binary level has been changed from _ZN9CDKIMBase7ProcessEPci to _ZN9CDKIMBase7ProcessEPcib. This may cause "undefined reference" linker error in old client applications.

	Change	Effect
1	Parameters list has been changed.	The name of the appropriate symbol for this function on binary level has been changed from _ZN9CDKIMBase11ProcessBodyEPci to _ZN9CDKIMBase11ProcessBodyEPcib. This may cause "undefined reference" linker error in old client applications.

	Change	Effect
1	Parameters list has been changed.	The name of the appropriate symbol for this function on binary level has been changed from _ZN9CDKIMSign11ProcessBodyEPci to _ZN9CDKIMSign11ProcessBodyEPcib. This may cause "undefined reference" linker error in old client applications.

	Change	Effect
1	Parameters list has been changed.	The name of the appropriate symbol for this function on binary level has been changed from _ZN11CDKIMVerify11ProcessBodyEPci to _ZN11CDKIMVerify11ProcessBodyEPcib. This may cause "undefined reference" linker error in old client applications.

dkimbase.h, libdkim.so
[+] CDKIMBase::Process ( char* szBuffer, int nBufLength ) (1)
[+] CDKIMBase::ProcessBody ( char* szBuffer, int nBufLength ) (1)

dkimsign.h, libdkim.so
[+] CDKIMSign::ProcessBody ( char* szBuffer, int nBufLength ) (1)

dkimverify.h, libdkim.so
[+] CDKIMVerify::ProcessBody ( char* szBuffer, int nBufLength ) (1)

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Problems with Data Types, Medium Severity (4)

	Change	Effect
1	Size of this class has been decreased from 52 bytes to 48 bytes.	Previous accesses of applications to public fields of this class or its subclasses may be incorrect.
2	Virtual method CDKIMBase::ProcessBody ( char, int, bool ) has been added to this class instead of CDKIMBase::ProcessBody ( char, int ).	Applications will pass parameters of older replaced method to newly added virtual method. This may result in crash or incorrect behavior of applications.

Offset	Virtual Table (Old) - 4 entries	Virtual Table (New) - 4 entries
0	(int (*)(...))0	(int (*)(...))0
4	(int (*)(...))(& typeinfo)	(int (*)(...))(& typeinfo)
8	CDKIMBase::ProcessHeaders	CDKIMBase::ProcessHeaders
12	CDKIMBase::ProcessBody	CDKIMBase::ProcessBody

	Change	Effect
1	Field m_EmptyLineCount has been added at the middle position of this structural type.	Layout of structure fields has been changed and therefore fields at higher positions of the structure definition may be incorrectly accessed by applications.

	Change	Effect
1	Field EmptyLineCount has been added at the middle position of this structural type.	1) Size of the inclusive type has been changed. 2) Layout of structure fields has been changed and therefore fields at higher positions of the structure definition may be incorrectly accessed by applications.

dkimbase.h
[+] class CDKIMBase (2)

dkimsign.h
[+] class CDKIMSign (1)

dkimverify.h
[+] class SignatureInfo (1)

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Problems with Data Types, Low Severity (2)

	Change	Effect
1	Size of this type has been changed from 52 bytes to 48 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

	Change	Effect
1	Size of this type has been changed from 96 bytes to 92 bytes.	The fields or parameters of such data type may be incorrectly initialized or accessed by old client applications.

dkimbase.h
[+] class CDKIMBase (1)

dkimverify.h
[+] class CDKIMVerify (1)

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Header Files (7)

dkim.h
dkimbase.h
dkimsign.h
dkimverify.h
dns.h
dnsresolv.h
resource.h

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Shared Libraries (1)

libdkim.so

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