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diff --git a/security/nss/doc/rst/legacy/pkcs11_functions/index.rst b/security/nss/doc/rst/legacy/pkcs11_functions/index.rst new file mode 100644 index 0000000000..13b9301c08 --- /dev/null +++ b/security/nss/doc/rst/legacy/pkcs11_functions/index.rst @@ -0,0 +1,554 @@ +.. _mozilla_projects_nss_pkcs11_functions: + +NSS PKCS11 Functions +==================== + +.. _pkcs_.2311_functions: + +`PKCS #11 Functions <#pkcs_.2311_functions>`__ +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +.. container:: + + This chapter describes the core PKCS #11 functions that an application needs for communicating + with cryptographic modules. In particular, these functions are used for obtaining certificates, + keys, and passwords. This was converted from `"Chapter 7: PKCS #11 + Functions" <https://www.mozilla.org/projects/security/pki/nss/ref/ssl/pkfnc.html>`__. + + - :ref:`mozilla_projects_nss_reference` + - `SECMOD_LoadUserModule <#secmod_loadusermodule>`__ + - `SECMOD_UnloadUserModule <#secmod_unloadusermodule>`__ + - `SECMOD_OpenUserDB <#secmod_openuserdb>`__ + - `SECMOD_CloseUserDB <#secmod_closeuserdb>`__ + - `PK11_FindCertFromNickname <#pk11_findcertfromnickname>`__ + - `PK11_FindKeyByAnyCert <#pk11_findkeybyanycert>`__ + - `PK11_GetSlotName <#pk11_getslotname>`__ + - `PK11_GetTokenName <#pk11_gettokenname>`__ + - `PK11_IsHW <#pk11_ishw>`__ + - `PK11_IsPresent <#pk11_ispresent>`__ + - `PK11_IsReadOnly <#pk11_isreadonly>`__ + - `PK11_SetPasswordFunc <#pk11_setpasswordfunc>`__ + + .. rubric:: SECMOD_LoadUserModule + :name: secmod_loadusermodule + + Load a new PKCS #11 module based on a moduleSpec. + + .. rubric:: Syntax + :name: syntax + + .. code:: + + #include "secmod.h" + + extern SECMODModule *SECMOD_LoadUserModule(char *moduleSpec, SECMODModule *parent, PRBool recurse); + + .. rubric:: Parameters + :name: parameters + + This function has the following parameters: + + *moduleSpec* is a pkcs #11 moduleSpec. *parent* is the moduleDB that presented this module spec. + For applications this value should be NULL. *recurse* is a boolean indicates whether or not the + module should also launch additional pkcs #11 modules. This is only applicable if the loaded + module is actually a moduleDB rather than a PKCS #11 module (see + :ref:`mozilla_projects_nss_pkcs11_module_specs`). + + .. rubric:: Returns + :name: returns + + The function returns one of these values: + + - If successful, a pointer to a SECMODModule. Caller owns the reference + - If unsuccessful, NULL. + + .. rubric:: Description + :name: description + + SECMOD_LoadUserModule loads a new PKCS #11 module into NSS and connects it to the current NSS + trust infrastructure. Once the module has been successfully loaded, other NSS calls will use it + in the normal course of searching. + + *modulespec* specifies how the module should be loaded. More information about module spec is + available at :ref:`mozilla_projects_nss_pkcs11_module_specs`. NSS parameters may be specified in + module specs used by SECMOD_LoadUserModule. + + Module will continue to function in the NSS infrastructure until unloaded with + SECMOD_UnloadUserModule. + + .. rubric:: SECMOD_UnloadUserModule + :name: secmod_unloadusermodule + + Unload a PKCS #11 module. + + .. rubric:: Syntax + :name: syntax_2 + + .. code:: + + #include "secmod.h" + + extern SECStatus SECMOD_UnloadUserModule(SECMODModule *module); + + .. rubric:: Parameters + :name: parameters_2 + + This function has the following parameters: + + *module* is the module to be unloaded. + + .. rubric:: Returns + :name: returns_2 + + The function returns one of these values: + + - If successful, SECSuccess. + - If unsuccessful, SECFailure. + + .. rubric:: Description + :name: description_2 + + SECMOD_UnloadUserModule detaches a module from the nss trust domain and unloads it. The module + should have previously been loaded by SECMOD_LoadUserModule. + + .. rubric:: SECMOD_CloseUserDB + :name: secmod_closeuserdb + + Close an already opened user database. NOTE: the database must be in the internal token, and must + be one created with SECMOD_OpenUserDB(). Once the database is closed, the slot will remain as an + empty slot until it's used again with SECMOD_OpenUserDB(). + + .. rubric:: Syntax + :name: syntax_3 + + .. code:: + + #include <pk11pub.h> + + SECStatus SECMOD_CloseUserDB(PK11SlotInfo *slot) + + .. rubric:: Parameters + :name: parameters_3 + + This function has the following parameter: + + *slot* A pointer to a slot info structure. This slot must a slot created by SECMOD_OpenUserDB() + at some point in the past. + + .. rubric:: Returns + :name: returns_3 + + The function returns one of these values: + + - If successful, SECSuccess). + - If unsuccessful, SECFailure. + + .. rubric:: SECMOD_OpenUserDB + :name: secmod_openuserdb + + Open a new database using the softoken. + + .. rubric:: Syntax + :name: syntax_4 + + .. code:: + + #include "pk11pub.h" + + PK11SlotInfo *SECMOD_OpenUserDB(const char *moduleSpec) + + .. rubric:: Parameters + :name: parameters_4 + + This function has the following parameters: + + *moduleSpec* is the same data that you would pass to softoken at initialization time under the + 'tokens' options. + + .. rubric:: Returns + :name: returns_4 + + The function returns one of these values: + + - If successful, a pointer to a slot. + - If unsuccessful, NULL. + + .. rubric:: Description + :name: description_3 + + Open a new database using the softoken. The caller is responsible for making sure the module spec + is correct and usable. The caller should ask for one new database per call if the caller wants to + get meaningful information about the new database. + + moduleSpec is the same data that you would pass to softoken at initialization time under the + 'tokens' options. For example, if you would normally specify *tokens=<0x4=[configdir='./mybackup' + tokenDescription='Backup']>* to softoken if you at init time, then you could specify + "*configdir='./mybackup' tokenDescription='Backup'*" as your module spec here to open the + database ./mybackup on the fly. The slot ID will be calculated for you by SECMOD_OpenUserDB(). + + Typical parameters here are configdir, tokenDescription and flags. a Full list is below: + + *configDir* The location of the databases for this token. If configDir is not specified, and + noCertDB and noKeyDB is not specified, the load will fail. + + *certPrefix* Cert prefix for this token. + + *keyPrefix* Prefix for the key database for this token. (if not specified, certPrefix will be + used). + + *tokenDescription* The label value for this token returned in the CK_TOKEN_INFO structure with an + internationalize string (UTF8). This value will be truncated at 32 bytes (no NULL, partial UTF8 + characters dropped). You should specify a user friendly name here as this is the value the token + will be referred to in most application UI's. You should make sure tokenDescription is unique. + + *slotDescription* The slotDescription value for this token returned in the CK_SLOT_INFO structure + with an internationalize string (UTF8). This value will be truncated at 64 bytes (no NULL, + partialUTF8 characters dropped). This name will not change after thedatabase is closed. It should + have some number to make this unique. + + *minPWLen* Then minimum password length for this token. + + | *flags* A comma separated list of flag values, parsed case-insensitive. + | Valid flags are: + + - *readOnly* - Databases should be opened read only. + - *noCertDB* - Don't try to open a certificate database. + - *noKeyDB* - Don't try to open a key database. + - *forceOpen* - Don't fail to initialize the token if thedatabases could not be opened. + - *passwordRequired* - zero length passwords are not acceptable(valid only if there is a keyDB). + - *optimizeSpace* - allocate smaller hash tables and lock tables.When this flag is not + specified, Softoken will allocatelarge tables to prevent lock contention. + + For more info on module strings see :ref:`mozilla_projects_nss_pkcs11_module_specs`. + + This function will return a reference to a slot. The caller is responsible for freeing the slot + reference when it is through. Freeing the slot reference will not unload the slot. That happens + with the corresponding SECMOD_CloseUserDB() function. Until the SECMOD_CloseUserDB function is + called, the newly opened database will be visible to any NSS calls search for keys or certs. + + .. rubric:: PK11_FindCertFromNickname + :name: pk11_findcertfromnickname + + Finds a certificate from its nickname. + + .. rubric:: Syntax + :name: syntax_5 + + .. code:: + + #include <pk11pub.h> + #include <certt.h> + + CERTCertificate *PK11_FindCertFromNickname( + char *nickname, + void *passwordArg); + + .. rubric:: Parameters + :name: parameters_5 + + This function has the following parameters: + + *nickname* A pointer to the nickname in the certificate database or to the nickname in the token. + + *passwordArg* A pointer to application data for the password callback function. This pointer is + set with SSL_SetPKCS11PinArg during SSL configuration. To retrieve its current value, use + SSL_RevealPinArg. + + .. rubric:: Returns + :name: returns_5 + + The function returns one of these values: + + - If successful, a pointer to a certificate structure. + - If unsuccessful, NULL. + + .. rubric:: Description + :name: description_4 + + When you are finished with the certificate structure returned by PK11_FindCertFromNickname, you + must free it by calling CERT_DestroyCertificate. + + The PK11_FindCertFromNickname function calls the password callback function set with + PK11_SetPasswordFunc and passes it the pointer specified by the wincx parameter. + + .. rubric:: PK11_FindKeyByAnyCert + :name: pk11_findkeybyanycert + + Finds the private key associated with a specified certificate in any available slot. + + .. rubric:: Syntax + :name: syntax_6 + + .. code:: + + #include <pk11pub.h> + #include <certt.h> + #include <keyt.h> + + SECKEYPrivateKey *PK11_FindKeyByAnyCert( + CERTCertificate *cert, + void *passwordArg); + + .. rubric:: Parameters + :name: parameters_6 + + This function has the following parameters: + + *cert* A pointer to a certificate structure in the certificate database. + + *passwordArg* A pointer to application data for the password callback function. This pointer is + set with SSL_SetPKCS11PinArg during SSL configuration. To retrieve its current value, use + SSL_RevealPinArg. + + .. rubric:: Returns + :name: returns_6 + + The function returns one of these values: + + - If successful, a pointer to a private key structure. + - If unsuccessful, NULL. + + .. rubric:: Description + :name: description_5 + + When you are finished with the private key structure returned by PK11_FindKeyByAnyCert, you must + free it by calling SECKEY_DestroyPrivateKey. + + The PK11_FindKeyByAnyCert function calls the password callback function set with + PK11_SetPasswordFunc and passes it the pointer specified by the wincx parameter. + + .. rubric:: PK11_GetSlotName + :name: pk11_getslotname + + Gets the name of a slot. + + .. rubric:: Syntax + :name: syntax_7 + + .. code:: + + #include <pk11pub.h> + + char *PK11_GetSlotName(PK11SlotInfo *slot); + + .. rubric:: Parameters + :name: parameters_7 + + This function has the following parameter: + + *slot* A pointer to a slot info structure. + + .. rubric:: Returns + :name: returns_7 + + The function returns one of these values: + + - If successful, a pointer to the name of the slot (a string). + - If unsuccessful, NULL. + + .. rubric:: Description + :name: description_6 + + If the slot is freed, the string with the slot name may also be freed. If you want to preserve + it, copy the string before freeing the slot. Do not try to free the string yourself. + + .. rubric:: PK11_GetTokenName + :name: pk11_gettokenname + + Gets the name of the token. + + .. rubric:: Syntax + :name: syntax_8 + + .. code:: + + #include <pk11pub.h> + + char *PK11_GetTokenName(PK11SlotInfo *slot); + + .. rubric:: Parameters + :name: parameters_8 + + This function has the following parameter: + + *slot* A pointer to a slot info structure. + + .. rubric:: Returns + :name: returns_8 + + The function returns one of these values: + + - If successful, a pointer to the name of the token (a string). + - If unsuccessful, NULL. + + .. rubric:: Description + :name: description_7 + + If the slot is freed, the string with the token name may also be freed. If you want to preserve + it, copy the string before freeing the slot. Do not try to free the string yourself. + + .. rubric:: PK11_IsHW + :name: pk11_ishw + + Finds out whether a slot is implemented in hardware or software. + + .. rubric:: Syntax + :name: syntax_9 + + .. code:: + + #include <pk11pub.h> + #include <prtypes.h> + + PRBool PK11_IsHW(PK11SlotInfo *slot); + + .. rubric:: Parameters + :name: parameters_9 + + This function has the following parameter: + + *slot* A pointer to a slot info structure. + + .. rubric:: Returns + :name: returns_9 + + The function returns one of these values: + + - If the slot is implemented in hardware, PR_TRUE. + - If the slot is implemented in software, PR_FALSE. + + .. rubric:: PK11_IsPresent + :name: pk11_ispresent + + Finds out whether the token for a slot is available. + + .. rubric:: Syntax + :name: syntax_10 + + .. code:: + + #include <pk11pub.h> + #include <prtypes.h> + + PRBool PK11_IsPresent(PK11SlotInfo *slot); + + .. rubric:: Parameters + :name: parameters_10 + + This function has the following parameter: + + *slot* A pointer to a slot info structure. + + .. rubric:: Returns + :name: returns_10 + + The function returns one of these values: + + - If token is available, PR_TRUE. + - If token is disabled or missing, PR_FALSE. + + .. rubric:: PK11_IsReadOnly + :name: pk11_isreadonly + + Finds out whether a slot is read-only. + + .. rubric:: Syntax + :name: syntax_11 + + .. code:: + + #include <pk11pub.h> + #include <prtypes.h> + + PRBool PK11_IsReadOnly(PK11SlotInfo *slot); + + .. rubric:: Parameters + :name: parameters_11 + + This function has the following parameter: + + *slot* A pointer to a slot info structure. + + .. rubric:: Returns + :name: returns_11 + + The function returns one of these values: + + - If slot is read-only, PR_TRUE. + - Otherwise, PR_FALSE. + + .. rubric:: PK11_SetPasswordFunc + :name: pk11_setpasswordfunc + + Defines a callback function used by the NSS libraries whenever information protected by a + password needs to be retrieved from the key or certificate databases. + + .. rubric:: Syntax + :name: syntax_12 + + .. code:: + + #include <pk11pub.h> + #include <prtypes.h> + + void PK11_SetPasswordFunc(PK11PasswordFunc func); + + .. rubric:: Parameter + :name: parameter + + This function has the following parameter: + + *func* A pointer to the callback function to set. + + .. rubric:: Description + :name: description_8 + + During the course of an SSL operation, it may be necessary for the user to log in to a PKCS #11 + token (either a smart card or soft token) to access protected information, such as a private key. + Such information is protected with a password that can be retrieved by calling an + application-supplied callback function. The callback function is identified in a call to + PK11_SetPasswordFunc that takes place during NSS initialization. + + The callback function set up by PK11_SetPasswordFunc has the following prototype: + + .. code:: + + typedef char *(*PK11PasswordFunc)( + PK11SlotInfo *slot, + PRBool retry, + void *arg); + + This callback function has the following parameters: + + *slot* A pointer to a slot info structure. + + *retry* Set to PR_TRUE if this is a retry. This implies that the callback has previously returned + the wrong password. + + *arg* A pointer supplied by the application that can be used to pass state information. Can be + NULL. + + This callback function returns one of these values: + + - If successful, a pointer to the password. This memory must have been allocated with PR_Malloc + or PL_strdup. + - If unsuccessful, returns NULL. + + Many tokens keep track of the number of attempts to enter a password and do not allow further + attempts after a certain point. Therefore, if the retry argument is PR_TRUE, indicating that the + password was tried and is wrong, the callback function should return NULL to indicate that it is + unsuccessful, rather than attempting to return the same password again. Failing to terminate when + the retry argument is PR_TRUE can result in an endless loop. + + Several functions in the NSS libraries use the password callback function to obtain the password + before performing operations that involve the protected information. The third parameter to the + password callback function is application-defined and can be used for any purpose. For example, + Mozilla uses the parameter to pass information about which window is associated with the modal + dialog box requesting the password from the user. When NSS SSL libraries call the password + callback function, the value they pass in the third parameter is determined by + SSL_SetPKCS11PinArg. + + .. rubric:: See Also + :name: see_also + + For examples of password callback functions, see the samples in the Samples directory.
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