mirror of
https://github.com/openssl/openssl.git
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50e735f9e5
This should be a one off operation (subsequent invokation of the script should not move them) Reviewed-by: Tim Hudson <tjh@openssl.org>
503 lines
22 KiB
C
503 lines
22 KiB
C
/*-
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* ModExp / RSA (with/without KM) plugin API
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*
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* The application will load a dynamic library which
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* exports entrypoint(s) defined in this file.
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*
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* This set of entrypoints provides only a multithreaded,
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* synchronous-within-each-thread, facility.
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*
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*
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* This file is Copyright 1998-2000 nCipher Corporation Limited.
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*
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* Redistribution and use in source and binary forms, with opr without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the copyright notice,
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* this list of conditions, and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions, and the following
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* disclaimer, in the documentation and/or other materials provided
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* with the distribution
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*
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* IN NO EVENT SHALL NCIPHER CORPORATION LIMITED (`NCIPHER') AND/OR
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* ANY OTHER AUTHORS OR DISTRIBUTORS OF THIS FILE BE LIABLE for any
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* damages arising directly or indirectly from this file, its use or
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* this licence. Without prejudice to the generality of the
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* foregoing: all liability shall be excluded for direct, indirect,
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* special, incidental, consequential or other damages or any loss of
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* profits, business, revenue goodwill or anticipated savings;
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* liability shall be excluded even if nCipher or anyone else has been
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* advised of the possibility of damage. In any event, if the
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* exclusion of liability is not effective, the liability of nCipher
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* or any author or distributor shall be limited to the lesser of the
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* price paid and 1,000 pounds sterling. This licence only fails to
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* exclude or limit liability for death or personal injury arising out
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* of negligence, and only to the extent that such an exclusion or
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* limitation is not effective.
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*
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* NCIPHER AND THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ALL
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* AND ANY WARRANTIES (WHETHER EXPRESS OR IMPLIED), including, but not
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* limited to, any implied warranties of merchantability, fitness for
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* a particular purpose, satisfactory quality, and/or non-infringement
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* of any third party rights.
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*
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* US Government use: This software and documentation is Commercial
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* Computer Software and Computer Software Documentation, as defined in
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* sub-paragraphs (a)(1) and (a)(5) of DFAR 252.227-7014, "Rights in
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* Noncommercial Computer Software and Noncommercial Computer Software
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* Documentation." Use, duplication or disclosure by the Government is
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* subject to the terms and conditions specified here.
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*
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* By using or distributing this file you will be accepting these
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* terms and conditions, including the limitation of liability and
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* lack of warranty. If you do not wish to accept these terms and
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* conditions, DO NOT USE THE FILE.
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*
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*
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* The actual dynamically loadable plugin, and the library files for
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* static linking, which are also provided in some distributions, are
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* not covered by the licence described above. You should have
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* received a separate licence with terms and conditions for these
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* library files; if you received the library files without a licence,
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* please contact nCipher.
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*
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*
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* $Id: hwcryptohook.h,v 1.1 2002/10/11 17:10:59 levitte Exp $
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*/
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#ifndef HWCRYPTOHOOK_H
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# define HWCRYPTOHOOK_H
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# include <sys/types.h>
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# include <stdio.h>
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# ifndef HWCRYPTOHOOK_DECLARE_APPTYPES
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# define HWCRYPTOHOOK_DECLARE_APPTYPES 1
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# endif
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# define HWCRYPTOHOOK_ERROR_FAILED -1
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# define HWCRYPTOHOOK_ERROR_FALLBACK -2
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# define HWCRYPTOHOOK_ERROR_MPISIZE -3
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# if HWCRYPTOHOOK_DECLARE_APPTYPES
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/*-
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* These structs are defined by the application and opaque to the
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* crypto plugin. The application may define these as it sees fit.
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* Default declarations are provided here, but the application may
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* #define HWCRYPTOHOOK_DECLARE_APPTYPES 0
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* to prevent these declarations, and instead provide its own
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* declarations of these types. (Pointers to them must still be
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* ordinary pointers to structs or unions, or the resulting combined
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* program will have a type inconsistency.)
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*/
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typedef struct HWCryptoHook_MutexValue HWCryptoHook_Mutex;
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typedef struct HWCryptoHook_CondVarValue HWCryptoHook_CondVar;
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typedef struct HWCryptoHook_PassphraseContextValue
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HWCryptoHook_PassphraseContext;
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typedef struct HWCryptoHook_CallerContextValue HWCryptoHook_CallerContext;
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# endif /* HWCRYPTOHOOK_DECLARE_APPTYPES */
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/*-
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* These next two structs are opaque to the application. The crypto
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* plugin will return pointers to them; the caller simply manipulates
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* the pointers.
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*/
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typedef struct HWCryptoHook_Context *HWCryptoHook_ContextHandle;
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typedef struct HWCryptoHook_RSAKey *HWCryptoHook_RSAKeyHandle;
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typedef struct {
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char *buf;
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size_t size;
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} HWCryptoHook_ErrMsgBuf;
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/*-
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* Used for error reporting. When a HWCryptoHook function fails it
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* will return a sentinel value (0 for pointer-valued functions, or a
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* negative number, usually HWCRYPTOHOOK_ERROR_FAILED, for
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* integer-valued ones). It will, if an ErrMsgBuf is passed, also put
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* an error message there.
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*
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* size is the size of the buffer, and will not be modified. If you
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* pass 0 for size you must pass 0 for buf, and nothing will be
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* recorded (just as if you passed 0 for the struct pointer).
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* Messages written to the buffer will always be null-terminated, even
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* when truncated to fit within size bytes.
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*
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* The contents of the buffer are not defined if there is no error.
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*/
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typedef struct HWCryptoHook_MPIStruct {
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unsigned char *buf;
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size_t size;
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} HWCryptoHook_MPI;
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/*-
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* When one of these is returned, a pointer is passed to the function.
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* At call, size is the space available. Afterwards it is updated to
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* be set to the actual length (which may be more than the space available,
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* if there was not enough room and the result was truncated).
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* buf (the pointer) is not updated.
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*
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* size is in bytes and may be zero at call or return, but must be a
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* multiple of the limb size. Zero limbs at the MS end are not
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* permitted.
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*/
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# define HWCryptoHook_InitFlags_FallbackModExp 0x0002UL
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# define HWCryptoHook_InitFlags_FallbackRSAImmed 0x0004UL
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/*-
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* Enable requesting fallback to software in case of problems with the
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* hardware support. This indicates to the crypto provider that the
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* application is prepared to fall back to software operation if the
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* ModExp* or RSAImmed* functions return HWCRYPTOHOOK_ERROR_FALLBACK.
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* Without this flag those calls will never return
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* HWCRYPTOHOOK_ERROR_FALLBACK. The flag will also cause the crypto
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* provider to avoid repeatedly attempting to contact dead hardware
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* within a short interval, if appropriate.
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*/
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# define HWCryptoHook_InitFlags_SimpleForkCheck 0x0010UL
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/*-
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* Without _SimpleForkCheck the library is allowed to assume that the
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* application will not fork and call the library in the child(ren).
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*
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* When it is specified, this is allowed. However, after a fork
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* neither parent nor child may unload any loaded keys or call
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* _Finish. Instead, they should call exit (or die with a signal)
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* without calling _Finish. After all the children have died the
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* parent may unload keys or call _Finish.
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*
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* This flag only has any effect on UN*X platforms.
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*/
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typedef struct {
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unsigned long flags;
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void *logstream; /* usually a FILE*. See below. */
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size_t limbsize; /* bignum format - size of radix type, must
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* be power of 2 */
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int mslimbfirst; /* 0 or 1 */
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int msbytefirst; /* 0 or 1; -1 = native */
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/*-
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* All the callback functions should return 0 on success, or a
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* nonzero integer (whose value will be visible in the error message
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* put in the buffer passed to the call).
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*
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* If a callback is not available pass a null function pointer.
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*
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* The callbacks may not call down again into the crypto plugin.
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*/
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/*-
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* For thread-safety. Set everything to 0 if you promise only to be
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* singlethreaded. maxsimultaneous is the number of calls to
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* ModExp[Crt]/RSAImmed{Priv,Pub}/RSA. If you don't know what to
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* put there then say 0 and the hook library will use a default.
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*
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* maxmutexes is a small limit on the number of simultaneous mutexes
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* which will be requested by the library. If there is no small
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* limit, set it to 0. If the crypto plugin cannot create the
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* advertised number of mutexes the calls to its functions may fail.
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* If a low number of mutexes is advertised the plugin will try to
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* do the best it can. Making larger numbers of mutexes available
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* may improve performance and parallelism by reducing contention
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* over critical sections. Unavailability of any mutexes, implying
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* single-threaded operation, should be indicated by the setting
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* mutex_init et al to 0.
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*/
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int maxmutexes;
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int maxsimultaneous;
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size_t mutexsize;
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int (*mutex_init) (HWCryptoHook_Mutex *,
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HWCryptoHook_CallerContext * cactx);
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int (*mutex_acquire) (HWCryptoHook_Mutex *);
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void (*mutex_release) (HWCryptoHook_Mutex *);
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void (*mutex_destroy) (HWCryptoHook_Mutex *);
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/*-
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* For greater efficiency, can use condition vars internally for
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* synchronisation. In this case maxsimultaneous is ignored, but
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* the other mutex stuff must be available. In singlethreaded
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* programs, set everything to 0.
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*/
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size_t condvarsize;
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int (*condvar_init) (HWCryptoHook_CondVar *,
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HWCryptoHook_CallerContext * cactx);
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int (*condvar_wait) (HWCryptoHook_CondVar *, HWCryptoHook_Mutex *);
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void (*condvar_signal) (HWCryptoHook_CondVar *);
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void (*condvar_broadcast) (HWCryptoHook_CondVar *);
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void (*condvar_destroy) (HWCryptoHook_CondVar *);
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/*-
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* The semantics of acquiring and releasing mutexes and broadcasting
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* and waiting on condition variables are expected to be those from
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* POSIX threads (pthreads). The mutexes may be (in pthread-speak)
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* fast mutexes, recursive mutexes, or nonrecursive ones.
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*
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* The _release/_signal/_broadcast and _destroy functions must
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* always succeed when given a valid argument; if they are given an
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* invalid argument then the program (crypto plugin + application)
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* has an internal error, and they should abort the program.
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*/
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int (*getpassphrase) (const char *prompt_info,
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int *len_io, char *buf,
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HWCryptoHook_PassphraseContext * ppctx,
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HWCryptoHook_CallerContext * cactx);
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/*-
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* Passphrases and the prompt_info, if they contain high-bit-set
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* characters, are UTF-8. The prompt_info may be a null pointer if
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* no prompt information is available (it should not be an empty
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* string). It will not contain text like `enter passphrase';
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* instead it might say something like `Operator Card for John
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* Smith' or `SmartCard in nFast Module #1, Slot #1'.
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*
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* buf points to a buffer in which to return the passphrase; on
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* entry *len_io is the length of the buffer. It should be updated
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* by the callback. The returned passphrase should not be
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* null-terminated by the callback.
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*/
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int (*getphystoken) (const char *prompt_info,
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const char *wrong_info,
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HWCryptoHook_PassphraseContext * ppctx,
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HWCryptoHook_CallerContext * cactx);
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/*-
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* Requests that the human user physically insert a different
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* smartcard, DataKey, etc. The plugin should check whether the
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* currently inserted token(s) are appropriate, and if they are it
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* should not make this call.
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*
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* prompt_info is as before. wrong_info is a description of the
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* currently inserted token(s) so that the user is told what
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* something is. wrong_info, like prompt_info, may be null, but
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* should not be an empty string. Its contents should be
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* syntactically similar to that of prompt_info.
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*/
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/*-
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* Note that a single LoadKey operation might cause several calls to
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* getpassphrase and/or requestphystoken. If requestphystoken is
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* not provided (ie, a null pointer is passed) then the plugin may
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* not support loading keys for which authorisation by several cards
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* is required. If getpassphrase is not provided then cards with
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* passphrases may not be supported.
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*
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* getpassphrase and getphystoken do not need to check that the
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* passphrase has been entered correctly or the correct token
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* inserted; the crypto plugin will do that. If this is not the
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* case then the crypto plugin is responsible for calling these
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* routines again as appropriate until the correct token(s) and
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* passphrase(s) are supplied as required, or until any retry limits
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* implemented by the crypto plugin are reached.
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*
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* In either case, the application must allow the user to say `no'
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* or `cancel' to indicate that they do not know the passphrase or
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* have the appropriate token; this should cause the callback to
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* return nonzero indicating error.
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*/
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void (*logmessage) (void *logstream, const char *message);
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/*-
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* A log message will be generated at least every time something goes
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* wrong and an ErrMsgBuf is filled in (or would be if one was
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* provided). Other diagnostic information may be written there too,
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* including more detailed reasons for errors which are reported in an
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* ErrMsgBuf.
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*
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* When a log message is generated, this callback is called. It
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* should write a message to the relevant logging arrangements.
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*
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* The message string passed will be null-terminated and may be of arbitrary
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* length. It will not be prefixed by the time and date, nor by the
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* name of the library that is generating it - if this is required,
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* the logmessage callback must do it. The message will not have a
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* trailing newline (though it may contain internal newlines).
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*
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* If a null pointer is passed for logmessage a default function is
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* used. The default function treats logstream as a FILE* which has
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* been converted to a void*. If logstream is 0 it does nothing.
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* Otherwise it prepends the date and time and library name and
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* writes the message to logstream. Each line will be prefixed by a
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* descriptive string containing the date, time and identity of the
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* crypto plugin. Errors on the logstream are not reported
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* anywhere, and the default function doesn't flush the stream, so
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* the application must set the buffering how it wants it.
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*
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* The crypto plugin may also provide a facility to have copies of
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* log messages sent elsewhere, and or for adjusting the verbosity
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* of the log messages; any such facilities will be configured by
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* external means.
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*/
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} HWCryptoHook_InitInfo;
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typedef
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HWCryptoHook_ContextHandle HWCryptoHook_Init_t(const HWCryptoHook_InitInfo *
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initinfo, size_t initinfosize,
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const HWCryptoHook_ErrMsgBuf *
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errors,
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HWCryptoHook_CallerContext *
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cactx);
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extern HWCryptoHook_Init_t HWCryptoHook_Init;
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/*-
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* Caller should set initinfosize to the size of the HWCryptoHook struct,
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* so it can be extended later.
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*
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* On success, a message for display or logging by the server,
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* including the name and version number of the plugin, will be filled
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* in into *errors; on failure *errors is used for error handling, as
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* usual.
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*/
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/*-
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* All these functions return 0 on success, HWCRYPTOHOOK_ERROR_FAILED
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* on most failures. HWCRYPTOHOOK_ERROR_MPISIZE means at least one of
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* the output MPI buffer(s) was too small; the sizes of all have been
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* set to the desired size (and for those where the buffer was large
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* enough, the value may have been copied in), and no error message
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* has been recorded.
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*
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* You may pass 0 for the errors struct. In any case, unless you set
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* _NoStderr at init time then messages may be reported to stderr.
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*/
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/*-
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* The RSAImmed* functions (and key managed RSA) only work with
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* modules which have an RSA patent licence - currently that means KM
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* units; the ModExp* ones work with all modules, so you need a patent
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* licence in the software in the US. They are otherwise identical.
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*/
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typedef
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void HWCryptoHook_Finish_t(HWCryptoHook_ContextHandle hwctx);
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extern HWCryptoHook_Finish_t HWCryptoHook_Finish;
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/* You must not have any calls going or keys loaded when you call this. */
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typedef
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int HWCryptoHook_RandomBytes_t(HWCryptoHook_ContextHandle hwctx,
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unsigned char *buf, size_t len,
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const HWCryptoHook_ErrMsgBuf * errors);
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extern HWCryptoHook_RandomBytes_t HWCryptoHook_RandomBytes;
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typedef
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int HWCryptoHook_ModExp_t(HWCryptoHook_ContextHandle hwctx,
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HWCryptoHook_MPI a,
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HWCryptoHook_MPI p,
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HWCryptoHook_MPI n,
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HWCryptoHook_MPI * r,
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const HWCryptoHook_ErrMsgBuf * errors);
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extern HWCryptoHook_ModExp_t HWCryptoHook_ModExp;
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typedef
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int HWCryptoHook_RSAImmedPub_t(HWCryptoHook_ContextHandle hwctx,
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HWCryptoHook_MPI m,
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HWCryptoHook_MPI e,
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HWCryptoHook_MPI n,
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HWCryptoHook_MPI * r,
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const HWCryptoHook_ErrMsgBuf * errors);
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extern HWCryptoHook_RSAImmedPub_t HWCryptoHook_RSAImmedPub;
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typedef
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int HWCryptoHook_ModExpCRT_t(HWCryptoHook_ContextHandle hwctx,
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HWCryptoHook_MPI a,
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HWCryptoHook_MPI p,
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HWCryptoHook_MPI q,
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HWCryptoHook_MPI dmp1,
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HWCryptoHook_MPI dmq1,
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HWCryptoHook_MPI iqmp,
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HWCryptoHook_MPI * r,
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const HWCryptoHook_ErrMsgBuf * errors);
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extern HWCryptoHook_ModExpCRT_t HWCryptoHook_ModExpCRT;
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typedef
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int HWCryptoHook_RSAImmedPriv_t(HWCryptoHook_ContextHandle hwctx,
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HWCryptoHook_MPI m,
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HWCryptoHook_MPI p,
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HWCryptoHook_MPI q,
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HWCryptoHook_MPI dmp1,
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HWCryptoHook_MPI dmq1,
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HWCryptoHook_MPI iqmp,
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HWCryptoHook_MPI * r,
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const HWCryptoHook_ErrMsgBuf * errors);
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extern HWCryptoHook_RSAImmedPriv_t HWCryptoHook_RSAImmedPriv;
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/*-
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* The RSAImmed* and ModExp* functions may return E_FAILED or
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* E_FALLBACK for failure.
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*
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* E_FAILED means the failure is permanent and definite and there
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* should be no attempt to fall back to software. (Eg, for some
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* applications, which support only the acceleration-only
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* functions, the `key material' may actually be an encoded key
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* identifier, and doing the operation in software would give wrong
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* answers.)
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*
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* E_FALLBACK means that doing the computation in software would seem
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* reasonable. If an application pays attention to this and is
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* able to fall back, it should also set the Fallback init flags.
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*/
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typedef
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int HWCryptoHook_RSALoadKey_t(HWCryptoHook_ContextHandle hwctx,
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const char *key_ident,
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HWCryptoHook_RSAKeyHandle * keyhandle_r,
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const HWCryptoHook_ErrMsgBuf * errors,
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HWCryptoHook_PassphraseContext * ppctx);
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extern HWCryptoHook_RSALoadKey_t HWCryptoHook_RSALoadKey;
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/*-
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* The key_ident is a null-terminated string configured by the
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* user via the application's usual configuration mechanisms.
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* It is provided to the user by the crypto provider's key management
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* system. The user must be able to enter at least any string of between
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* 1 and 1023 characters inclusive, consisting of printable 7-bit
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* ASCII characters. The provider should avoid using
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* any characters except alphanumerics and the punctuation
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* characters _ - + . / @ ~ (the user is expected to be able
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* to enter these without quoting). The string may be case-sensitive.
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* The application may allow the user to enter other NULL-terminated strings,
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* and the provider must cope (returning an error if the string is not
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* valid).
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*
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* If the key does not exist, no error is recorded and 0 is returned;
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* keyhandle_r will be set to 0 instead of to a key handle.
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*/
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typedef
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int HWCryptoHook_RSAGetPublicKey_t(HWCryptoHook_RSAKeyHandle k,
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HWCryptoHook_MPI * n,
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HWCryptoHook_MPI * e,
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const HWCryptoHook_ErrMsgBuf * errors);
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extern HWCryptoHook_RSAGetPublicKey_t HWCryptoHook_RSAGetPublicKey;
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/*-
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* The crypto plugin will not store certificates.
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*
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* Although this function for acquiring the public key value is
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* provided, it is not the purpose of this API to deal fully with the
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* handling of the public key.
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*
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* It is expected that the crypto supplier's key generation program
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* will provide general facilities for producing X.509
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* self-certificates and certificate requests in PEM format. These
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* will be given to the user so that they can configure them in the
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* application, send them to CAs, or whatever.
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*
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* In case this kind of certificate handling is not appropriate, the
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* crypto supplier's key generation program should be able to be
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* configured not to generate such a self-certificate or certificate
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* request. Then the application will need to do all of this, and
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* will need to store and handle the public key and certificates
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* itself.
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*/
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typedef
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int HWCryptoHook_RSAUnloadKey_t(HWCryptoHook_RSAKeyHandle k,
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const HWCryptoHook_ErrMsgBuf * errors);
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extern HWCryptoHook_RSAUnloadKey_t HWCryptoHook_RSAUnloadKey;
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/* Might fail due to locking problems, or other serious internal problems. */
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typedef
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int HWCryptoHook_RSA_t(HWCryptoHook_MPI m,
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HWCryptoHook_RSAKeyHandle k,
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HWCryptoHook_MPI * r,
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const HWCryptoHook_ErrMsgBuf * errors);
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extern HWCryptoHook_RSA_t HWCryptoHook_RSA;
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/* RSA private key operation (sign or decrypt) - raw, unpadded. */
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#endif /* HWCRYPTOHOOK_H */
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