p11-kit: URIs

URIs

URIs — Parsing and formatting PKCS#11 URIs

Functions

P11KitUri *	p11_kit_uri_new ()
CK_INFO_PTR	p11_kit_uri_get_module_info ()
int	p11_kit_uri_match_module_info ()
CK_TOKEN_INFO_PTR	p11_kit_uri_get_token_info ()
int	p11_kit_uri_match_token_info ()
CK_ATTRIBUTE_PTR	p11_kit_uri_get_attributes ()
int	p11_kit_uri_set_attributes ()
void	p11_kit_uri_clear_attributes ()
int	p11_kit_uri_match_attributes ()
CK_ATTRIBUTE_PTR	p11_kit_uri_get_attribute ()
int	p11_kit_uri_set_attribute ()
int	p11_kit_uri_clear_attribute ()
void	p11_kit_uri_set_unrecognized ()
int	p11_kit_uri_any_unrecognized ()
const char *	p11_kit_uri_get_pin_source ()
void	p11_kit_uri_set_pin_source ()
const char *	p11_kit_uri_get_pinfile ()
void	p11_kit_uri_set_pinfile ()
int	p11_kit_uri_format ()
int	p11_kit_uri_parse ()
void	p11_kit_uri_free ()
const char *	p11_kit_uri_message ()

Types and Values

#define	P11_KIT_URI_SCHEME
#define	P11_KIT_URI_SCHEME_LEN
enum	P11KitUriType
enum	P11KitUriResult
typedef	P11KitUri
typedef	p11_kit_uri
#define	P11_KIT_URI_NO_MEMORY

Description

PKCS#11 URIs can be used in configuration files or applications to represent PKCS#11 modules, tokens or objects. An example of a URI might be:



     pkcs11:token=The%20Software%20PKCS#11%20softtoken;

         manufacturer=Snake%20Oil,%20Inc.;serial=;object=my-certificate;

         model=1.0;type=cert;id=%69%95%3e%5c%f4%bd%ec%91

You can use p11_kit_uri_parse() to parse such a URI, and p11_kit_uri_format() to build one. URIs are represented by the P11KitUri structure. You can match a parsed URI against PKCS#11 tokens with p11_kit_uri_match_token_info() or attributes with p11_kit_uri_match_attributes().

Since URIs can represent different sorts of things, when parsing or formatting a URI a 'context' can be used to indicate which sort of URI is expected.

URIs have an unrecognized flag. This flag is set during parsing if any parts of the URI are not recognized. This may be because the part is from a newer version of the PKCS#11 spec or because that part was not valid inside of the desired context used when parsing.

Functions

p11_kit_uri_new ()

P11KitUri *
p11_kit_uri_new (void);

Create a new blank PKCS#11 URI.

The new URI is in the right state to parse a string into. All relevant fields are zeroed out. Formatting this URI will produce a valid but empty URI.

Returns

A newly allocated URI. This should be freed with p11_kit_uri_free().

p11_kit_uri_get_module_info ()

CK_INFO_PTR
p11_kit_uri_get_module_info (P11KitUri *uri);

Get the CK_INFO structure associated with this URI.

If this is a parsed URI, then the fields corresponding to library parts of the URI will be filled in. Any library URI parts that were missing will have their fields filled with zeros.

If the caller wishes to setup information for building a URI, then relevant fields should be filled in. Fields that should not appear as parts in the resulting URI should be filled with zeros.

Parameters

uri

the URI

Returns

A pointer to the CK_INFO structure.

p11_kit_uri_match_module_info ()

int
p11_kit_uri_match_module_info (P11KitUri *uri,
                               CK_INFO_PTR info);

Match a CK_INFO structure against the library parts of this URI.

Only the fields of the CK_INFO structure that are valid for use in a URI will be matched. A URI part that was not specified in the URI will match any value in the structure. If during the URI parsing any unrecognized parts were encountered then this match will fail.

Parameters

uri	the URI
info	the structure to match against the URI

Returns

1 if the URI matches, 0 if not.

p11_kit_uri_get_token_info ()

CK_TOKEN_INFO_PTR
p11_kit_uri_get_token_info (P11KitUri *uri);

Get the CK_TOKEN_INFO structure associated with this URI.

If this is a parsed URI, then the fields corresponding to token parts of the URI will be filled in. Any token URI parts that were missing will have their fields filled with zeros.

If the caller wishes to setup information for building a URI, then relevant fields should be filled in. Fields that should not appear as parts in the resulting URI should be filled with zeros.

Parameters

uri

the URI

Returns

A pointer to the CK_INFO structure.

p11_kit_uri_match_token_info ()

int
p11_kit_uri_match_token_info (P11KitUri *uri,
                              CK_TOKEN_INFO_PTR token_info);

Match a CK_TOKEN_INFO structure against the token parts of this URI.

Only the fields of the CK_TOKEN_INFO structure that are valid for use in a URI will be matched. A URI part that was not specified in the URI will match any value in the structure. If during the URI parsing any unrecognized parts were encountered then this match will fail.

Parameters

uri	the URI
token_info	the structure to match against the URI

Returns

1 if the URI matches, 0 if not.

p11_kit_uri_get_attributes ()

CK_ATTRIBUTE_PTR
p11_kit_uri_get_attributes (P11KitUri *uri,
                            CK_ULONG *n_attrs);

p11_kit_uri_set_attributes ()

int
p11_kit_uri_set_attributes (P11KitUri *uri,
                            CK_ATTRIBUTE_PTR attrs,
                            CK_ULONG n_attrs);

p11_kit_uri_clear_attributes ()

void
p11_kit_uri_clear_attributes (P11KitUri *uri);

p11_kit_uri_match_attributes ()

int
p11_kit_uri_match_attributes (P11KitUri *uri,
                              CK_ATTRIBUTE_PTR attrs,
                              CK_ULONG n_attrs);

Match a attributes against the object parts of this URI.

Only the attributes that are valid for use in a URI will be matched. A URI part that was not specified in the URI will match any attribute value. If during the URI parsing any unrecognized parts were encountered then this match will fail.

Parameters

uri	The URI
attrs	The attributes to match
n_attrs	The number of attributes

Returns

1 if the URI matches, 0 if not.

p11_kit_uri_get_attribute ()

CK_ATTRIBUTE_PTR
p11_kit_uri_get_attribute (P11KitUri *uri,
                           CK_ATTRIBUTE_TYPE attr_type);

Get a pointer to an attribute present in this URI.

Parameters

uri	The URI
attr_type	The attribute type

Returns

A pointer to the attribute, or NULL if not present. The attribute is owned by the URI and should not be freed.

p11_kit_uri_set_attribute ()

int
p11_kit_uri_set_attribute (P11KitUri *uri,
                           CK_ATTRIBUTE_PTR attr);

Set an attribute on the URI.

Only attributes that map to parts in a PKCS#11 URI will be accepted.

Parameters

uri	The URI
attr	The attribute to set

Returns

P11_KIT_URI_OK if the attribute was successfully set. P11_KIT_URI_NOT_FOUND if the attribute was not valid for a URI.

p11_kit_uri_clear_attribute ()

int
p11_kit_uri_clear_attribute (P11KitUri *uri,
                             CK_ATTRIBUTE_TYPE attr_type);

Clear an attribute on the URI.

Only attributes that map to parts in a PKCS#11 URI will be accepted.

Parameters

uri	The URI
attr_type	The type of the attribute to clear

Returns

P11_KIT_URI_OK if the attribute was successfully cleared. P11_KIT_URI_NOT_FOUND if the attribute was not valid for a URI.

p11_kit_uri_set_unrecognized ()

void
p11_kit_uri_set_unrecognized (P11KitUri *uri,
                              int unrecognized);

p11_kit_uri_set_unrecognized is deprecated and should not be used in newly-written code.

Set the unrecognized flag on this URI.

The unrecognized flag is automatically set to 1 when during parsing any part of the URI is unrecognized. If the unrecognized flag is set to 1, then matching against this URI will always fail.

Parameters

uri	The URI
unrecognized	The new unregognized flag value

p11_kit_uri_any_unrecognized ()

int
p11_kit_uri_any_unrecognized (P11KitUri *uri);

Get the unrecognized flag for this URI.

The unrecognized flag is automatically set to 1 when during parsing any part of the URI is unrecognized. If the unrecognized flag is set to 1, then matching against this URI will always fail.

Parameters

uri

The URI

Returns

1 if unrecognized flag is set, 0 otherwise.

p11_kit_uri_get_pin_source ()

const char *
p11_kit_uri_get_pin_source (P11KitUri *uri);

Get the 'pin-source' part of the URI. This is used by some applications to lookup a PIN for logging into a PKCS#11 token.

Parameters

uri

The URI

Returns

The pin-source or NULL if not present.

p11_kit_uri_set_pin_source ()

void
p11_kit_uri_set_pin_source (P11KitUri *uri,
                            const char *pin_source);

Set the 'pin-source' part of the URI. This is used by some applications to lookup a PIN for logging into a PKCS#11 token.

Parameters

uri	The URI
pin_source	The new pin-source

p11_kit_uri_get_pinfile ()

const char *
p11_kit_uri_get_pinfile (P11KitUri *uri);

p11_kit_uri_get_pinfile is deprecated and should not be used in newly-written code.

use p11_kit_uri_get_pin_source().

Parameters

uri

The URI

p11_kit_uri_set_pinfile ()

void
p11_kit_uri_set_pinfile (P11KitUri *uri,
                         const char *pinfile);

p11_kit_uri_set_pinfile is deprecated and should not be used in newly-written code.

use p11_kit_uri_set_pin_source().

Parameters

uri	The URI
pinfile	The pinfile

p11_kit_uri_format ()

int
p11_kit_uri_format (P11KitUri *uri,
                    P11KitUriType uri_type,
                    char **string);

Format a PKCS#11 URI into a string.

Fields which are zeroed out will not be included in the resulting string. Attributes which are not present will also not be included.

The uri_type of URI specified limits the different parts of the resulting URI. To format a URI containing all possible information use P11_KIT_URI_FOR_ANY

It's up to the caller to guarantee that the attributes set in uri are those appropriate for inclusion in a URI, specifically: CKA_ID, CKA_LABEL and CKA_CLASS. The class must be one of CKO_DATA, CKO_SECRET_KEY, CKO_CERTIFICATE, CKO_PUBLIC_KEY, CKO_PRIVATE_KEY.

The resulting string should be freed with free().

Parameters

uri	The URI.
uri_type	The type of URI that should be produced.
string	Location to store a newly allocated string.

Returns

P11_KIT_URI_OK if the URI was formatted successfully, P11_KIT_URI_UNEXPECTED if the data in uri is invalid for a URI.

p11_kit_uri_parse ()

int
p11_kit_uri_parse (const char *string,
                   P11KitUriType uri_type,
                   P11KitUri *uri);

Parse a PKCS#11 URI string.

PKCS#11 URIs can represent tokens, objects or modules. The uri_type argument allows the caller to specify what type of URI is expected and the sorts of things the URI should match. P11_KIT_URI_FOR_ANY can be used to parse a URI for any context. It's then up to the caller to make sense of the way that it is used.

If the PKCS#11 URI contains unrecognized URI parts or parts not applicable to the specified context, then the unrecognized flag will be set. This will prevent the URI from matching using the various match functions.

Parameters

string	The string to parse
uri_type	The type of URI that is expected
uri	The blank URI to parse the values into

Returns

P11_KIT_URI_OK if the URI was parsed successfully. P11_KIT_URI_BAD_SCHEME if this was not a PKCS#11 URI. P11_KIT_URI_BAD_SYNTAX if the URI syntax was bad. P11_KIT_URI_BAD_VERSION if a version number was bad. P11_KIT_URI_BAD_ENCODING if the URI encoding was invalid.

p11_kit_uri_free ()

void
p11_kit_uri_free (P11KitUri *uri);

Free a PKCS#11 URI.

Parameters

uri

The URI

p11_kit_uri_message ()

const char *
p11_kit_uri_message (int code);

Lookup a message for the uri error code. These codes are the P11_KIT_URI_XXX error codes that can be returned from p11_kit_uri_parse() or p11_kit_uri_format(). As a special case NULL, will be returned for P11_KIT_URI_OK.

Parameters

code

The error code

Returns

The message for the error code. This string is owned by the p11-kit library.

Types and Values

P11_KIT_URI_SCHEME

#define P11_KIT_URI_SCHEME "pkcs11"

String of URI scheme for PKCS#11 URIs.

P11_KIT_URI_SCHEME_LEN

#define P11_KIT_URI_SCHEME_LEN 6

Length of P11_KIT_URI_SCHEME.

enum P11KitUriType

A PKCS#11 URI can represent different kinds of things. This flag is used by p11_kit_uri_parse() to denote in what context the URI will be used.

The various types can be combined.

Members

P11_KIT_URI_FOR_OBJECT	The URI represents one or more objects
P11_KIT_URI_FOR_TOKEN	The URI represents one or more tokens
P11_KIT_URI_FOR_MODULE	The URI represents one or more modules
P11_KIT_URI_FOR_MODULE_WITH_VERSION	The URI represents a module with a specific version.
P11_KIT_URI_FOR_OBJECT_ON_TOKEN	The URI represents one or more objects that are present on a specific token.
P11_KIT_URI_FOR_OBJECT_ON_TOKEN_AND_MODULE	The URI represents one or more objects that are present on a specific token, being used with a certain module.
P11_KIT_URI_FOR_ANY	The URI can represent anything

enum P11KitUriResult

Error codes returned by various functions. The functions each clearly state which error codes they are capable of returning.

Members

P11_KIT_URI_OK	Success
P11_KIT_URI_UNEXPECTED	Unexpected or internal system error
P11_KIT_URI_BAD_SCHEME	The URI had a bad scheme
P11_KIT_URI_BAD_ENCODING	The URI had a bad encoding
P11_KIT_URI_BAD_SYNTAX	The URI had a bad syntax
P11_KIT_URI_BAD_VERSION	The URI contained a bad version number
P11_KIT_URI_NOT_FOUND	A requested part of the URI was not found

P11KitUri

typedef struct p11_kit_uri P11KitUri;

A structure representing a PKCS#11 URI. There are no public fields visible in this structure. Use the various accessor functions.

p11_kit_uri

typedef struct p11_kit_uri p11_kit_uri;

P11_KIT_URI_NO_MEMORY

#define P11_KIT_URI_NO_MEMORY P11_KIT_URI_UNEXPECTED

Unexpected memory allocation failure result. Same as P11_KIT_URI_UNEXPECTED.