office-gobmx/libxmlsec/readme.txt
Kurt Zenker 618a465336 CWS-TOOLING: integrate CWS jl135_nss
2009-10-01 15:20:03 +0200 jl  r276605 : #1004856# moved to xmlsec1-mingw32.patch 
2009-10-01 10:51:24 +0200 jl  r276580 : #1004856# build keymgr with mingw
2009-10-01 10:50:52 +0200 jl  r276579 : #1004856# build keymgr with mingw
2009-10-01 10:37:28 +0200 jl  r276578 : #1004856# do not build xmlsec1 app
2009-09-29 16:01:31 +0200 jl  r276532 : #1004856# Using libxml2 from solver if available
2009-09-26 16:31:32 +0200 jl  r276477 : #i104856# xmlsec1-mscrypto-1 is now xmlsec1-mscrypto
2009-09-25 17:05:26 +0200 jl  r276470 : CWS-TOOLING: rebase CWS jl135_nss to trunk@276429 (milestone: DEV300:m60)
2009-09-24 12:57:10 +0200 jl  r276419 : #i104856# libxmlsec update
2009-09-24 12:46:58 +0200 jl  r276418 : #i104856# fixing mac configure problem in configure.in and regenerating configure
2009-09-23 16:49:54 +0200 jl  r276405 : i#104856# configure failed on mac
2009-09-23 10:21:35 +0200 jl  r276369 : #i104856# adapting patches to apply cleanly and readme change
2009-09-21 13:45:47 +0200 jl  r276326 : #i104856 updating to 1.2.12, using changes patches from cmc made on xmlsec1_2_12
2009-09-21 11:27:46 +0200 jl  r276319 : #i105183# forget to uncomment PATCH_FILES
2009-09-18 17:41:20 +0200 jl  r276296 : #i105183# update of nss libs
2009-10-14 16:21:13 +00:00

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The XML Security library has been modified, so that there is NO verification of
the certificate during sign or verification operation. On Windows this was done
in the function xmlSecMSCryptoX509StoreVerify (file src/mscrypto/x509vfy.c) and
on UNIX in xmlSecNssX509StoreVerify (file src/nss/x509vfy.c).
The implementation creates certificates from all of the X509Data children, such
as X509IssuerSerial and X509Certificate and stores them in a certificate store
(see xmlsec/src/mscrypto/x509.c:xmlSecMSCryptoX509DataNodeRead). It must then
find the certificate containing the public key which is used for validation
within that store. This is done in xmlSecMSCryptoX509StoreVerify. This function
however only takes those certificates into account which can be validated. This
was changed by the patch xmlsec1-noverify.patch, which prevents this certificate
validation.
xmlSecMSCryptoX509StoreVerify iterates over all certificates contained or
referenced in the X509Data elements and selects one which is no issuer of any of
the other certificates. This certificate is not necessarily the one which was
used for signing but it must contain the proper validation key, which is
sufficient to validate the signature. See
http://www.w3.org/TR/xmldsig-core/#sec-X509Data
for details.
There is a flag XMLSEC_KEYINFO_FLAGS_X509DATA_DONT_VERIFY_CERTS that can be set
in a xmlSecKeyInfoCtx (see function xmlSecNssKeyDataX509XmlRead, in file
src/nss/x509.c), which indicates that one can turn of the validation. However,
setting it will cause that the validation key is not found. If the flag is set,
then the key is not extracted from the certificate store which contains all the
certificates of the X509Data elements. In other words, the certificates which
are delivered within the XML signature are not used when looking for suitable
validation key.