Some ASN1 objects stored on some smartcards (for instance the
IASECC/CPX ones) do not comply strictly with the rules
8.6.2.3 and 8.6.2.3 from the ITU.
Since these rules are not some strict ones, let's have a loose
decoding option that can be displayed by the command:
opensc-explorer
asn1 7001 # for instance
Fix: issue #2224
ASN1 tags are represented in two many ways within OpenSC.
This is a trivial change to simplify one aspect of this.
It also makes the code more readable.
SC_ASN1_CLASS_MASK, SC_ASN1_APP, SC_ASN1_CTX, SC_ASN1_PRV,
SC_ASN1_CONS are changed, and SC_ASN1_CLASS_MASK is added.
These then align with the bits defined by SC_ASN1_TAG_CLASS,
SC_ASN1_TAG_APPLICATION, SC_ASN1_TAG_CONTEXT, SC_ASN1_TAG_PRIVATE,
and SC_ASN1_TAG_CONSTRUCTED.
(SC_ASN1_UNI and SC_ASN1_TAG_UNIVERSAL are both 0x00 thus no change
is needed).
(No sign of a right shift of SC_ASN1_CTX or SC_ASN1_PRV causeing
problems has been seen in the code.) If found, can be solved.)
Close examination of the OpenSC code base shows all uses of tags
used by routines and sc_asn1_entry use the defines.
This could allows 26 lines of code in sc_asn1_skip_tag used to test
the 3 CLASS and CONSTRUCTED bits to be replaced by:
if (((cla << 24) | tag) != tag_in)
return NULL;
The 26 lines still work as will any other code in OpenSC
that tests the bits using the defines. It also allows new code
to be simplified.
Problem identified while looking at better way to check response
on GET_DATA (0xCB) that returns TLV as used in card-piv.c
Changes tested using pkcs11-tool --test --login with PIV, SC_HSM
and OpenPGP cards.
3 bytes is the size of SC_ASN1_TAG_MASK used when composing
the asn1 templates with 'struct sc_asn1_entry'.
With this limitation maximal supported ASN.1 tag number is 2^^14-1 .
Fixed 'dead-code' coverity-scan issue.
Close#707
Enhance sc_asn1_put_tag to support larger tag names and larger tags.
Prior to this, sc_asn1_put_tag did only support tags with a length of at most 127 bytes and tag names of one byte.
- enhanced support for encoding/decoding of CHOICE
- moved encoding/decoding of AlgorithmIdentifier to separate file,
and added encoding/decoding of algorithm parameters
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@526 c6295689-39f2-0310-b995-f0e70906c6a9
- Changed call convention for reader finish()
- CT-API driver now frees its resources correctly
- Added year 2002 to some of the copyright statements
- sc_pkcs15_decipher() and sc_pkcs15_compute_signature()
now select only the parent DF of the private key file
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@463 c6295689-39f2-0310-b995-f0e70906c6a9
Currently fails to compile, unless you symlink
all the necessary headers to src/include/opensc
by yourself.
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@459 c6295689-39f2-0310-b995-f0e70906c6a9
- Implemented a generic ATR matching helper function
- Made signing much smarter (should even work now)
- Added info about supported crypto algorithms to struct sc_card
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@276 c6295689-39f2-0310-b995-f0e70906c6a9
- modified ASN.1 decoding to make it easier to
port decoder structures to the encoder
- fixed a recently introduced bug in card driver handling
- opensc-explorer will now allow only DF's to be cd'd into
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@156 c6295689-39f2-0310-b995-f0e70906c6a9
- moved some functions from sc.c to sc-iso7816-4.c
- added fancy colors to log output =)
- removed global sc_debug variable, moved it to sc_context
- fixed new ASN.1 code (possibly still unstable)
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@83 c6295689-39f2-0310-b995-f0e70906c6a9
- added sc_asn1_put_tag() and sc_restore_security_env() functions
- preliminary support for CREATE FILE and DELETE FILE commands
git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@42 c6295689-39f2-0310-b995-f0e70906c6a9
Vincent JARDIN
Doug Engert
Jakub Jelen
Frank Morgner
Viktor Tarasov
Philip Wendland
Andreas Schwier
vtarasov
viktor.tarasov
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nils
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jey