[mirror_edk2.git] / CryptoPkg / Library / BaseCryptLibRuntimeCryptProtocol / RuntimeDxeIpfCryptLib.c

/** @file\r
  Implementation of The runtime cryptographic library instance (for IPF).\r
\r
Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <Uefi.h>\r
\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiRuntimeLib.h>\r
\r
#include <Protocol/RuntimeCrypt.h>\r
\r
#include <Guid/EventGroup.h>\r
\r
EFI_RUNTIME_CRYPT_PROTOCOL  *mCryptProtocol = NULL;\r
EFI_EVENT                   mIpfCryptLibVirtualNotifyEvent;\r
\r
/**\r
  Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE, which converts\r
  pointer to new virtual address.\r
\r
  @param  Event        Event whose notification function is being invoked.\r
  @param  Context      Pointer to the notification function's context\r
\r
**/\r
VOID\r
EFIAPI\r
IpfCryptLibAddressChangeEvent (\r
  IN  EFI_EVENT        Event,\r
  IN  VOID             *Context\r
  )\r
{\r
  //\r
  // Convert Address of Runtime Crypto Protocol.\r
  //\r
  EfiConvertPointer (0x0, (VOID **) &mCryptProtocol);\r
}\r
\r
/**\r
  Constructor of IPF Crypto Library Instance.\r
  This function locates the Runtime Crypt Protocol and register notification\r
  function for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
\r
  @param  ImageHandle   The firmware allocated handle for the EFI image.\r
  @param  SystemTable   A pointer to the EFI System Table.\r
\r
  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
RuntimeDxeIpfCryptLibConstructor (\r
  IN      EFI_HANDLE                ImageHandle,\r
  IN      EFI_SYSTEM_TABLE          *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status;\r
\r
  //\r
  // Locate Runtime Crypt Protocol Instance\r
  //\r
  Status = gBS->LocateProtocol (\r
                  &gEfiRuntimeCryptProtocolGuid,\r
                  NULL,\r
                  (VOID**) &mCryptProtocol\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
  ASSERT (mCryptProtocol != NULL);\r
\r
  //\r
  // Register SetVirtualAddressMap () notify function\r
  //\r
  Status = gBS->CreateEventEx (\r
                  EVT_NOTIFY_SIGNAL,\r
                  TPL_NOTIFY,\r
                  IpfCryptLibAddressChangeEvent,\r
                  NULL,\r
                  &gEfiEventVirtualAddressChangeGuid,\r
                  &mIpfCryptLibVirtualNotifyEvent\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  return Status;\r
}\r
\r
/**\r
  Destructor of IPF Crypto Library Instance.\r
\r
  @param  ImageHandle   The firmware allocated handle for the EFI image.\r
  @param  SystemTable   A pointer to the EFI System Table.\r
\r
  @retval EFI_SUCCESS   The destructor completed successfully.\r
  @retval Other value   The destructor did not complete successfully.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
RuntimeDxeIpfCryptLibDestructor (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status;\r
\r
  //\r
  // Close the Set Virtual Address Map event\r
  //\r
  Status = gBS->CloseEvent (mIpfCryptLibVirtualNotifyEvent);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  return Status;\r
}\r
\r
/**\r
  Check whether crypto service provided by Runtime Crypt protocol is ready to use.\r
\r
  Crypto service is available if the call is in physical mode prior to\r
  SetVirtualAddressMap() or virtual mode after SetVirtualAddressMap(). If either\r
  of these two conditions are met, this routine will return TRUE; if neither of\r
  these conditions are met, this routine will return FALSE.\r
\r
  @retval TRUE   The Crypto service is ready to use.\r
  @retval FALSE  The Crypto service is not available.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
InternalIsCryptServiveAvailable (\r
  VOID\r
  )\r
{\r
  INT64    CpuMode;\r
  BOOLEAN  GoneVirtual;\r
\r
  CpuMode = AsmCpuVirtual();\r
  if (CpuMode < 0) {\r
    //\r
    // CPU is in mixed mode, return failing the operation gracefully.\r
    //\r
    return FALSE;\r
  }\r
\r
  GoneVirtual = EfiGoneVirtual();\r
\r
  if ((CpuMode > 0) && !GoneVirtual) {\r
    //\r
    // CPU is in virtual mode, but SetVirtualAddressMap() has not been called,\r
    // so return failing the operation gracefully.\r
    //\r
    return FALSE;\r
  }\r
\r
  if ((CpuMode == 0) && GoneVirtual) {\r
    //\r
    // CPU is in physical mode, but SetVirtualAddressMap() has been called,\r
    // so return failing the operation gracefully.\r
    //\r
    return FALSE;\r
  }\r
\r
  return TRUE;\r
}\r
\r
/**\r
  Retrieves the size, in bytes, of the context buffer required for SHA-256 operations.\r
\r
  @return  The size, in bytes, of the context buffer required for SHA-256 operations.\r
\r
**/\r
UINTN\r
EFIAPI\r
Sha256GetContextSize (\r
  VOID\r
  )\r
{\r
  if (!InternalIsCryptServiveAvailable ()) {\r
    return 0;\r
  }\r
\r
  return mCryptProtocol->Sha256GetContextSize ();\r
}\r
\r
/**\r
  Initializes user-supplied memory pointed by Sha256Context as SHA-256 hash context for\r
  subsequent use.\r
\r
  If Sha256Context is NULL, then return FALSE.\r
\r
  @param[in, out]  Sha256Context  Pointer to SHA-256 Context being initialized.\r
\r
  @retval TRUE   SHA-256 context initialization succeeded.\r
  @retval FALSE  SHA-256 context initialization failed.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
Sha256Init (\r
  IN OUT  VOID  *Sha256Context\r
  )\r
{\r
  if (!InternalIsCryptServiveAvailable ()) {\r
    return FALSE;\r
  }\r
\r
  return mCryptProtocol->Sha256Init (Sha256Context);\r
}\r
\r
\r
/**\r
  Makes a copy of an existing SHA-256 context.\r
\r
  Return FALSE to indicate this interface is not supported.\r
\r
  @param[in]  Sha256Context     Pointer to SHA-256 context being copied.\r
  @param[out] NewSha256Context  Pointer to new SHA-256 context.\r
\r
  @retval FALSE  This interface is not supported.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
Sha256Duplicate (\r
  IN   CONST VOID  *Sha256Context,\r
  OUT  VOID        *NewSha256Context\r
  )\r
{\r
  ASSERT (FALSE);\r
  return FALSE;\r
}\r
\r
\r
/**\r
  Performs SHA-256 digest on a data buffer of the specified length. This function can\r
  be called multiple times to compute the digest of long or discontinuous data streams.\r
\r
  If Sha256Context is NULL, then return FALSE.\r
\r
  @param[in, out]  Sha256Context  Pointer to the SHA-256 context.\r
  @param[in]       Data           Pointer to the buffer containing the data to be hashed.\r
  @param[in]       DataLength     Length of Data buffer in bytes.\r
\r
  @retval TRUE   SHA-256 data digest succeeded.\r
  @retval FALSE  Invalid SHA-256 context. After Sha256Final function has been called, the\r
                 SHA-256 context cannot be reused.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
Sha256Update (\r
  IN OUT  VOID        *Sha256Context,\r
  IN      CONST VOID  *Data,\r
  IN      UINTN       DataLength\r
  )\r
{\r
  if (!InternalIsCryptServiveAvailable ()) {\r
    return FALSE;\r
  }\r
\r
  return mCryptProtocol->Sha256Update (Sha256Context, Data, DataLength);\r
}\r
\r
/**\r
  Completes SHA-256 hash computation and retrieves the digest value into the specified\r
  memory. After this function has been called, the SHA-256 context cannot be used again.\r
\r
  If Sha256Context is NULL, then return FALSE.\r
  If HashValue is NULL, then return FALSE.\r
\r
  @param[in, out]  Sha256Context  Pointer to SHA-256 context\r
  @param[out]      HashValue      Pointer to a buffer that receives the SHA-256 digest\r
                                  value (32 bytes).\r
\r
  @retval TRUE   SHA-256 digest computation succeeded.\r
  @retval FALSE  SHA-256 digest computation failed.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
Sha256Final (\r
  IN OUT  VOID   *Sha256Context,\r
  OUT     UINT8  *HashValue\r
  )\r
{\r
  if (!InternalIsCryptServiveAvailable ()) {\r
    return FALSE;\r
  }\r
\r
  return mCryptProtocol->Sha256Final (Sha256Context, HashValue);\r
}\r
\r
/**\r
  Allocates and initializes one RSA context for subsequent use.\r
\r
  @return  Pointer to the RSA context that has been initialized.\r
           If the allocations fails, RsaNew() returns NULL.\r
\r
**/\r
VOID *\r
EFIAPI\r
RsaNew (\r
  VOID\r
  )\r
{\r
  if (!InternalIsCryptServiveAvailable ()) {\r
    return FALSE;\r
  }\r
\r
  return mCryptProtocol->RsaNew ();\r
}\r
\r
/**\r
  Release the specified RSA context.\r
\r
  @param[in]  RsaContext  Pointer to the RSA context to be released.\r
\r
**/\r
VOID\r
EFIAPI\r
RsaFree (\r
  IN  VOID  *RsaContext\r
  )\r
{\r
  if (!InternalIsCryptServiveAvailable ()) {\r
    return;\r
  }\r
\r
  mCryptProtocol->RsaFree (RsaContext);\r
}\r
\r
/**\r
  Sets the tag-designated key component into the established RSA context.\r
\r
  This function sets the tag-designated RSA key component into the established\r
  RSA context from the user-specified non-negative integer (octet string format\r
  represented in RSA PKCS#1).\r
  If BigNumber is NULL, then the specified key componenet in RSA context is cleared.\r
\r
  If RsaContext is NULL, then return FALSE.\r
\r
  @param[in, out]  RsaContext  Pointer to RSA context being set.\r
  @param[in]       KeyTag      Tag of RSA key component being set.\r
  @param[in]       BigNumber   Pointer to octet integer buffer.\r
                               If NULL, then the specified key componenet in RSA\r
                               context is cleared.\r
  @param[in]       BnSize      Size of big number buffer in bytes.\r
                               If BigNumber is NULL, then it is ignored.\r
\r
  @retval  TRUE   RSA key component was set successfully.\r
  @retval  FALSE  Invalid RSA key component tag.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
RsaSetKey (\r
  IN OUT  VOID         *RsaContext,\r
  IN      RSA_KEY_TAG  KeyTag,\r
  IN      CONST UINT8  *BigNumber,\r
  IN      UINTN        BnSize\r
  )\r
{\r
  if (!InternalIsCryptServiveAvailable ()) {\r
    return FALSE;\r
  }\r
\r
  return mCryptProtocol->RsaSetKey (RsaContext, KeyTag, BigNumber, BnSize);\r
}\r
\r
/**\r
  Verifies the RSA-SSA signature with EMSA-PKCS1-v1_5 encoding scheme defined in\r
  RSA PKCS#1.\r
\r
  If RsaContext is NULL, then return FALSE.\r
  If MessageHash is NULL, then return FALSE.\r
  If Signature is NULL, then return FALSE.\r
  If HashSize is not equal to the size of MD5, SHA-1 or SHA-256 digest, then return FALSE.\r
\r
  @param[in]  RsaContext   Pointer to RSA context for signature verification.\r
  @param[in]  MessageHash  Pointer to octet message hash to be checked.\r
  @param[in]  HashSize     Size of the message hash in bytes.\r
  @param[in]  Signature    Pointer to RSA PKCS1-v1_5 signature to be verified.\r
  @param[in]  SigSize      Size of signature in bytes.\r
\r
  @retval  TRUE   Valid signature encoded in PKCS1-v1_5.\r
  @retval  FALSE  Invalid signature or invalid RSA context.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
RsaPkcs1Verify (\r
  IN  VOID         *RsaContext,\r
  IN  CONST UINT8  *MessageHash,\r
  IN  UINTN        HashSize,\r
  IN  UINT8        *Signature,\r
  IN  UINTN        SigSize\r
  )\r
{\r
  if (!InternalIsCryptServiveAvailable ()) {\r
    return FALSE;\r
  }\r
\r
  return mCryptProtocol->RsaPkcs1Verify (\r
                           RsaContext,\r
                           MessageHash,\r
                           HashSize,\r
                           Signature,\r
                           SigSize\r
                           );\r
}\r
Commit	Line	Data
97f98500 HT	1	/** @file\r
	2	Implementation of The runtime cryptographic library instance (for IPF).\r
	3	\r
16d2c32c	4	Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>\r
97f98500 HT	5	This program and the accompanying materials\r
	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
	13	**/\r
	14	\r
	15	#include <Uefi.h>\r
	16	\r
	17	#include <Library/BaseLib.h>\r
	18	#include <Library/DebugLib.h>\r
	19	#include <Library/UefiBootServicesTableLib.h>\r
	20	#include <Library/UefiRuntimeLib.h>\r
	21	\r
	22	#include <Protocol/RuntimeCrypt.h>\r
	23	\r
	24	#include <Guid/EventGroup.h>\r
	25	\r
	26	EFI_RUNTIME_CRYPT_PROTOCOL *mCryptProtocol = NULL;\r
	27	EFI_EVENT mIpfCryptLibVirtualNotifyEvent;\r
	28	\r
	29	/**\r
	30	Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE, which converts\r
	31	pointer to new virtual address.\r
	32	\r
	33	@param Event Event whose notification function is being invoked.\r
	34	@param Context Pointer to the notification function's context\r
	35	\r
	36	**/\r
	37	VOID\r
	38	EFIAPI\r
	39	IpfCryptLibAddressChangeEvent (\r
	40	IN EFI_EVENT Event,\r
	41	IN VOID *Context\r
	42	)\r
	43	{\r
	44	//\r
	45	// Convert Address of Runtime Crypto Protocol.\r
	46	//\r
	47	EfiConvertPointer (0x0, (VOID **) &mCryptProtocol);\r
	48	}\r
	49	\r
	50	/**\r
	51	Constructor of IPF Crypto Library Instance.\r
	52	This function locates the Runtime Crypt Protocol and register notification\r
	53	function for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
	54	\r
	55	@param ImageHandle The firmware allocated handle for the EFI image.\r
	56	@param SystemTable A pointer to the EFI System Table.\r
	57	\r
	58	@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r
	59	\r
	60	**/\r
	61	EFI_STATUS\r
	62	EFIAPI\r
	63	RuntimeDxeIpfCryptLibConstructor (\r
	64	IN EFI_HANDLE ImageHandle,\r
	65	IN EFI_SYSTEM_TABLE *SystemTable\r
	66	)\r
	67	{\r
	68	EFI_STATUS Status;\r
69	\r
70	//\r
71	// Locate Runtime Crypt Protocol Instance\r
72	//\r
73	Status = gBS->LocateProtocol (\r
74	&gEfiRuntimeCryptProtocolGuid,\r
75	NULL,\r
76	(VOID**) &mCryptProtocol\r
77	);\r
78	ASSERT_EFI_ERROR (Status);\r
79	ASSERT (mCryptProtocol != NULL);\r
80	\r
81	//\r
82	// Register SetVirtualAddressMap () notify function\r
83	//\r
84	Status = gBS->CreateEventEx (\r
85	EVT_NOTIFY_SIGNAL,\r
86	TPL_NOTIFY,\r
87	IpfCryptLibAddressChangeEvent,\r
88	NULL,\r
89	&gEfiEventVirtualAddressChangeGuid,\r
90	&mIpfCryptLibVirtualNotifyEvent\r
91	);\r
92	ASSERT_EFI_ERROR (Status);\r
93	\r
94	return Status;\r
95	}\r
96	\r
97	/**\r
98	Destructor of IPF Crypto Library Instance.\r
99	\r
100	@param ImageHandle The firmware allocated handle for the EFI image.\r
101	@param SystemTable A pointer to the EFI System Table.\r
102	\r
103	@retval EFI_SUCCESS The destructor completed successfully.\r
104	@retval Other value The destructor did not complete successfully.\r
105	\r
106	**/\r
107	EFI_STATUS\r
108	EFIAPI\r
109	RuntimeDxeIpfCryptLibDestructor (\r
110	IN EFI_HANDLE ImageHandle,\r
111	IN EFI_SYSTEM_TABLE *SystemTable\r
112	)\r
113	{\r
114	EFI_STATUS Status;\r
115	\r
116	//\r
117	// Close the Set Virtual Address Map event\r
118	//\r
119	Status = gBS->CloseEvent (mIpfCryptLibVirtualNotifyEvent);\r
120	ASSERT_EFI_ERROR (Status);\r
121	\r
122	return Status;\r
123	}\r
124	\r
125	/**\r
126	Check whether crypto service provided by Runtime Crypt protocol is ready to use.\r
127	\r
128	Crypto service is available if the call is in physical mode prior to\r
129	SetVirtualAddressMap() or virtual mode after SetVirtualAddressMap(). If either\r
130	of these two conditions are met, this routine will return TRUE; if neither of\r
131	these conditions are met, this routine will return FALSE.\r
132	\r
133	@retval TRUE The Crypto service is ready to use.\r
134	@retval FALSE The Crypto service is not available.\r
135	\r
136	**/\r
137	BOOLEAN\r
138	EFIAPI\r
139	InternalIsCryptServiveAvailable (\r
140	VOID\r
141	)\r
142	{\r
143	INT64 CpuMode;\r
144	BOOLEAN GoneVirtual;\r
145	\r
146	CpuMode = AsmCpuVirtual();\r
147	if (CpuMode < 0) {\r
148	//\r
149	// CPU is in mixed mode, return failing the operation gracefully.\r
150	//\r
151	return FALSE;\r
152	}\r
153	\r
154	GoneVirtual = EfiGoneVirtual();\r
155	\r
156	if ((CpuMode > 0) && !GoneVirtual) {\r
157	//\r
158	// CPU is in virtual mode, but SetVirtualAddressMap() has not been called,\r
159	// so return failing the operation gracefully.\r
160	//\r
161	return FALSE;\r
162	}\r
163	\r
164	if ((CpuMode == 0) && GoneVirtual) {\r
165	//\r
166	// CPU is in physical mode, but SetVirtualAddressMap() has been called,\r
167	// so return failing the operation gracefully.\r
168	//\r
169	return FALSE;\r
170	}\r
171	\r
172	return TRUE;\r
173	}\r
174	\r
175	/**\r
176	Retrieves the size, in bytes, of the context buffer required for SHA-256 operations.\r
177	\r
178	@return The size, in bytes, of the context buffer required for SHA-256 operations.\r
179	\r
180	**/\r
181	UINTN\r
182	EFIAPI\r
183	Sha256GetContextSize (\r
184	VOID\r
185	)\r
186	{\r
187	if (!InternalIsCryptServiveAvailable ()) {\r
188	return 0;\r
189	}\r
190	\r
191	return mCryptProtocol->Sha256GetContextSize ();\r
192	}\r
193	\r
194	/**\r
195	Initializes user-supplied memory pointed by Sha256Context as SHA-256 hash context for\r
196	subsequent use.\r
197	\r
16d2c32c	198	If Sha256Context is NULL, then return FALSE.\r
97f98500 HT	199	\r
	200	@param[in, out] Sha256Context Pointer to SHA-256 Context being initialized.\r
	201	\r
	202	@retval TRUE SHA-256 context initialization succeeded.\r
	203	@retval FALSE SHA-256 context initialization failed.\r
	204	\r
	205	**/\r
	206	BOOLEAN\r
	207	EFIAPI\r
	208	Sha256Init (\r
	209	IN OUT VOID *Sha256Context\r
	210	)\r
	211	{\r
	212	if (!InternalIsCryptServiveAvailable ()) {\r
	213	return FALSE;\r
	214	}\r
	215	\r
	216	return mCryptProtocol->Sha256Init (Sha256Context);\r
	217	}\r
	218	\r
	219	\r
532616bb	220	/**\r
	221	Makes a copy of an existing SHA-256 context.\r
	222	\r
	223	Return FALSE to indicate this interface is not supported.\r
	224	\r
	225	@param[in] Sha256Context Pointer to SHA-256 context being copied.\r
	226	@param[out] NewSha256Context Pointer to new SHA-256 context.\r
	227	\r
	228	@retval FALSE This interface is not supported.\r
	229	\r
	230	**/\r
	231	BOOLEAN\r
	232	EFIAPI\r
	233	Sha256Duplicate (\r
	234	IN CONST VOID *Sha256Context,\r
	235	OUT VOID *NewSha256Context\r
	236	)\r
	237	{\r
	238	ASSERT (FALSE);\r
	239	return FALSE;\r
	240	}\r
	241	\r
	242	\r
97f98500 HT	243	/**\r
	244	Performs SHA-256 digest on a data buffer of the specified length. This function can\r
	245	be called multiple times to compute the digest of long or discontinuous data streams.\r
	246	\r
16d2c32c	247	If Sha256Context is NULL, then return FALSE.\r
97f98500 HT	248	\r
	249	@param[in, out] Sha256Context Pointer to the SHA-256 context.\r
	250	@param[in] Data Pointer to the buffer containing the data to be hashed.\r
	251	@param[in] DataLength Length of Data buffer in bytes.\r
	252	\r
	253	@retval TRUE SHA-256 data digest succeeded.\r
	254	@retval FALSE Invalid SHA-256 context. After Sha256Final function has been called, the\r
	255	SHA-256 context cannot be reused.\r
	256	\r
	257	**/\r
	258	BOOLEAN\r
	259	EFIAPI\r
	260	Sha256Update (\r
	261	IN OUT VOID *Sha256Context,\r
	262	IN CONST VOID *Data,\r
	263	IN UINTN DataLength\r
	264	)\r
	265	{\r
	266	if (!InternalIsCryptServiveAvailable ()) {\r
	267	return FALSE;\r
	268	}\r
	269	\r
	270	return mCryptProtocol->Sha256Update (Sha256Context, Data, DataLength);\r
	271	}\r
	272	\r
	273	/**\r
	274	Completes SHA-256 hash computation and retrieves the digest value into the specified\r
	275	memory. After this function has been called, the SHA-256 context cannot be used again.\r
	276	\r
16d2c32c	277	If Sha256Context is NULL, then return FALSE.\r
16d2c32c	278	If HashValue is NULL, then return FALSE.\r
97f98500 HT	279	\r
	280	@param[in, out] Sha256Context Pointer to SHA-256 context\r
	281	@param[out] HashValue Pointer to a buffer that receives the SHA-256 digest\r
	282	value (32 bytes).\r
	283	\r
	284	@retval TRUE SHA-256 digest computation succeeded.\r
	285	@retval FALSE SHA-256 digest computation failed.\r
	286	\r
	287	**/\r
	288	BOOLEAN\r
	289	EFIAPI\r
	290	Sha256Final (\r
	291	IN OUT VOID *Sha256Context,\r
	292	OUT UINT8 *HashValue\r
	293	)\r
	294	{\r
	295	if (!InternalIsCryptServiveAvailable ()) {\r
	296	return FALSE;\r
	297	}\r
	298	\r
	299	return mCryptProtocol->Sha256Final (Sha256Context, HashValue);\r
	300	}\r
	301	\r
	302	/**\r
532616bb	303	Allocates and initializes one RSA context for subsequent use.\r
97f98500	304	\r
532616bb	305	@return Pointer to the RSA context that has been initialized.\r
97f98500 HT	306	If the allocations fails, RsaNew() returns NULL.\r
	307	\r
	308	**/\r
	309	VOID *\r
	310	EFIAPI\r
	311	RsaNew (\r
	312	VOID\r
	313	)\r
	314	{\r
	315	if (!InternalIsCryptServiveAvailable ()) {\r
	316	return FALSE;\r
	317	}\r
	318	\r
	319	return mCryptProtocol->RsaNew ();\r
	320	}\r
	321	\r
	322	/**\r
532616bb	323	Release the specified RSA context.\r
97f98500 HT	324	\r
	325	@param[in] RsaContext Pointer to the RSA context to be released.\r
	326	\r
	327	**/\r
	328	VOID\r
	329	EFIAPI\r
	330	RsaFree (\r
	331	IN VOID *RsaContext\r
	332	)\r
	333	{\r
	334	if (!InternalIsCryptServiveAvailable ()) {\r
	335	return;\r
	336	}\r
	337	\r
	338	mCryptProtocol->RsaFree (RsaContext);\r
	339	}\r
	340	\r
	341	/**\r
532616bb	342	Sets the tag-designated key component into the established RSA context.\r
	343	\r
	344	This function sets the tag-designated RSA key component into the established\r
	345	RSA context from the user-specified non-negative integer (octet string format\r
	346	represented in RSA PKCS#1).\r
	347	If BigNumber is NULL, then the specified key componenet in RSA context is cleared.\r
97f98500	348	\r
16d2c32c	349	If RsaContext is NULL, then return FALSE.\r
97f98500 HT	350	\r
	351	@param[in, out] RsaContext Pointer to RSA context being set.\r
	352	@param[in] KeyTag Tag of RSA key component being set.\r
	353	@param[in] BigNumber Pointer to octet integer buffer.\r
532616bb	354	If NULL, then the specified key componenet in RSA\r
	355	context is cleared.\r
	356	@param[in] BnSize Size of big number buffer in bytes.\r
	357	If BigNumber is NULL, then it is ignored.\r
97f98500	358	\r
532616bb	359	@retval TRUE RSA key component was set successfully.\r
532616bb	360	@retval FALSE Invalid RSA key component tag.\r
97f98500 HT	361	\r
	362	**/\r
	363	BOOLEAN\r
	364	EFIAPI\r
	365	RsaSetKey (\r
532616bb	366	IN OUT VOID *RsaContext,\r
	367	IN RSA_KEY_TAG KeyTag,\r
	368	IN CONST UINT8 *BigNumber,\r
	369	IN UINTN BnSize\r
97f98500 HT	370	)\r
	371	{\r
	372	if (!InternalIsCryptServiveAvailable ()) {\r
	373	return FALSE;\r
	374	}\r
	375	\r
532616bb	376	return mCryptProtocol->RsaSetKey (RsaContext, KeyTag, BigNumber, BnSize);\r
97f98500 HT	377	}\r
	378	\r
	379	/**\r
	380	Verifies the RSA-SSA signature with EMSA-PKCS1-v1_5 encoding scheme defined in\r
	381	RSA PKCS#1.\r
	382	\r
16d2c32c	383	If RsaContext is NULL, then return FALSE.\r
	384	If MessageHash is NULL, then return FALSE.\r
	385	If Signature is NULL, then return FALSE.\r
532616bb	386	If HashSize is not equal to the size of MD5, SHA-1 or SHA-256 digest, then return FALSE.\r
97f98500 HT	387	\r
	388	@param[in] RsaContext Pointer to RSA context for signature verification.\r
	389	@param[in] MessageHash Pointer to octet message hash to be checked.\r
532616bb	390	@param[in] HashSize Size of the message hash in bytes.\r
97f98500	391	@param[in] Signature Pointer to RSA PKCS1-v1_5 signature to be verified.\r
532616bb	392	@param[in] SigSize Size of signature in bytes.\r
97f98500	393	\r
532616bb	394	@retval TRUE Valid signature encoded in PKCS1-v1_5.\r
532616bb	395	@retval FALSE Invalid signature or invalid RSA context.\r
97f98500 HT	396	\r
	397	**/\r
	398	BOOLEAN\r
	399	EFIAPI\r
	400	RsaPkcs1Verify (\r
	401	IN VOID *RsaContext,\r
	402	IN CONST UINT8 *MessageHash,\r
532616bb	403	IN UINTN HashSize,\r
97f98500	404	IN UINT8 *Signature,\r
532616bb	405	IN UINTN SigSize\r
97f98500 HT	406	)\r
	407	{\r
	408	if (!InternalIsCryptServiveAvailable ()) {\r
	409	return FALSE;\r
	410	}\r
	411	\r
	412	return mCryptProtocol->RsaPkcs1Verify (\r
	413	RsaContext,\r
	414	MessageHash,\r
532616bb	415	HashSize,\r
97f98500	416	Signature,\r
532616bb	417	SigSize\r
97f98500 HT	418	);\r
97f98500 HT	419	}\r