[mirror_edk2.git] / CryptoPkg / Library / BaseCryptLib / Pk / CryptRsaExt.c

/** @file\r
  RSA Asymmetric Cipher Wrapper Implementation over OpenSSL.\r
\r
  This file implements following APIs which provide more capabilities for RSA:\r
  1) RsaGetKey\r
  2) RsaGenerateKey\r
  3) RsaCheckKey\r
  4) RsaPkcs1Sign\r
\r
Copyright (c) 2009 - 2013, 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 "InternalCryptLib.h"\r
\r
#include <openssl/rsa.h>\r
#include <openssl/err.h>\r
#include <openssl/objects.h>\r
\r
/**\r
  Gets the tag-designated RSA key component from the established RSA context.\r
\r
  This function retrieves the tag-designated RSA key component from the\r
  established RSA context as a non-negative integer (octet string format\r
  represented in RSA PKCS#1).\r
  If specified key component has not been set or has been cleared, then returned\r
  BnSize is set to 0.\r
  If the BigNumber buffer is too small to hold the contents of the key, FALSE\r
  is returned and BnSize is set to the required buffer size to obtain the key.\r
\r
  If RsaContext is NULL, then return FALSE.\r
  If BnSize is NULL, then return FALSE.\r
  If BnSize is large enough but BigNumber 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[out]      BigNumber   Pointer to octet integer buffer.\r
  @param[in, out]  BnSize      On input, the size of big number buffer in bytes.\r
                               On output, the size of data returned in big number buffer in bytes.\r
\r
  @retval  TRUE   RSA key component was retrieved successfully.\r
  @retval  FALSE  Invalid RSA key component tag.\r
  @retval  FALSE  BnSize is too small.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
RsaGetKey (\r
  IN OUT  VOID         *RsaContext,\r
  IN      RSA_KEY_TAG  KeyTag,\r
  OUT     UINT8        *BigNumber,\r
  IN OUT  UINTN        *BnSize\r
  )\r
{\r
  RSA    *RsaKey;\r
  BIGNUM *BnKey;\r
  UINTN  Size;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if (RsaContext == NULL || BnSize == NULL) {\r
    return FALSE;\r
  }\r
\r
  RsaKey  = (RSA *) RsaContext;\r
  Size    = *BnSize;\r
  *BnSize = 0;\r
\r
  switch (KeyTag) {\r
\r
  //\r
  // RSA Public Modulus (N)\r
  //\r
  case RsaKeyN:\r
    if (RsaKey->n == NULL) {\r
      return TRUE;\r
    }\r
    BnKey = RsaKey->n;\r
    break;\r
\r
  //\r
  // RSA Public Exponent (e)\r
  //\r
  case RsaKeyE:\r
    if (RsaKey->e == NULL) {\r
      return TRUE;\r
    }\r
    BnKey = RsaKey->e;\r
    break;\r
\r
  //\r
  // RSA Private Exponent (d)\r
  //\r
  case RsaKeyD:\r
    if (RsaKey->d == NULL) {\r
      return TRUE;\r
    }\r
    BnKey = RsaKey->d;\r
    break;\r
\r
  //\r
  // RSA Secret Prime Factor of Modulus (p)\r
  //\r
  case RsaKeyP:\r
    if (RsaKey->p == NULL) {\r
      return TRUE;\r
    }\r
    BnKey = RsaKey->p;\r
    break;\r
\r
  //\r
  // RSA Secret Prime Factor of Modules (q)\r
  //\r
  case RsaKeyQ:\r
    if (RsaKey->q == NULL) {\r
      return TRUE;\r
    }\r
    BnKey = RsaKey->q;\r
    break;\r
\r
  //\r
  // p's CRT Exponent (== d mod (p - 1))\r
  //\r
  case RsaKeyDp:\r
    if (RsaKey->dmp1 == NULL) {\r
      return TRUE;\r
    }\r
    BnKey = RsaKey->dmp1;\r
    break;\r
\r
  //\r
  // q's CRT Exponent (== d mod (q - 1))\r
  //\r
  case RsaKeyDq:\r
    if (RsaKey->dmq1 == NULL) {\r
      return TRUE;\r
    }\r
    BnKey = RsaKey->dmq1;\r
    break;\r
\r
  //\r
  // The CRT Coefficient (== 1/q mod p)\r
  //\r
  case RsaKeyQInv:\r
    if (RsaKey->iqmp == NULL) {\r
      return TRUE;\r
    }\r
    BnKey = RsaKey->iqmp;\r
    break;\r
\r
  default:\r
    return FALSE;\r
  }\r
\r
  *BnSize = Size;\r
  Size    = BN_num_bytes (BnKey);\r
\r
  if (*BnSize < Size) {\r
    *BnSize = Size;\r
    return FALSE;\r
  }\r
\r
  if (BigNumber == NULL) {\r
    return FALSE;\r
  }\r
  *BnSize = BN_bn2bin (BnKey, BigNumber) ;\r
  \r
  return TRUE;\r
}\r
\r
/**\r
  Generates RSA key components.\r
\r
  This function generates RSA key components. It takes RSA public exponent E and\r
  length in bits of RSA modulus N as input, and generates all key components.\r
  If PublicExponent is NULL, the default RSA public exponent (0x10001) will be used.\r
\r
  Before this function can be invoked, pseudorandom number generator must be correctly\r
  initialized by RandomSeed().\r
\r
  If RsaContext is NULL, then return FALSE.\r
\r
  @param[in, out]  RsaContext           Pointer to RSA context being set.\r
  @param[in]       ModulusLength        Length of RSA modulus N in bits.\r
  @param[in]       PublicExponent       Pointer to RSA public exponent.\r
  @param[in]       PublicExponentSize   Size of RSA public exponent buffer in bytes. \r
\r
  @retval  TRUE   RSA key component was generated successfully.\r
  @retval  FALSE  Invalid RSA key component tag.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
RsaGenerateKey (\r
  IN OUT  VOID         *RsaContext,\r
  IN      UINTN        ModulusLength,\r
  IN      CONST UINT8  *PublicExponent,\r
  IN      UINTN        PublicExponentSize\r
  )\r
{\r
  BIGNUM   *KeyE;\r
  BOOLEAN  RetVal;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if (RsaContext == NULL || ModulusLength > INT_MAX || PublicExponentSize > INT_MAX) {\r
    return FALSE;\r
  }\r
  \r
  KeyE = BN_new ();\r
  if (KeyE == NULL) {\r
    return FALSE;\r
  }\r
\r
  RetVal = FALSE;\r
  \r
  if (PublicExponent == NULL) {\r
    if (BN_set_word (KeyE, 0x10001) == 0) {\r
      goto _Exit;\r
    }\r
  } else {\r
    if (BN_bin2bn (PublicExponent, (UINT32) PublicExponentSize, KeyE) == NULL) {\r
      goto _Exit;\r
    }\r
  }\r
\r
  if (RSA_generate_key_ex ((RSA *) RsaContext, (UINT32) ModulusLength, KeyE, NULL) == 1) {\r
   RetVal = TRUE;\r
  }\r
\r
_Exit:\r
  BN_free (KeyE);\r
  return RetVal;\r
}\r
\r
/**\r
  Validates key components of RSA context.\r
\r
  This function validates key compoents of RSA context in following aspects:\r
  - Whether p is a prime\r
  - Whether q is a prime\r
  - Whether n = p * q\r
  - Whether d*e = 1  mod lcm(p-1,q-1)\r
\r
  If RsaContext is NULL, then return FALSE.\r
\r
  @param[in]  RsaContext  Pointer to RSA context to check.\r
\r
  @retval  TRUE   RSA key components are valid.\r
  @retval  FALSE  RSA key components are not valid.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
RsaCheckKey (\r
  IN  VOID  *RsaContext\r
  )\r
{\r
  UINTN  Reason;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if (RsaContext == NULL) {\r
    return FALSE;\r
  }\r
  \r
  if  (RSA_check_key ((RSA *) RsaContext) != 1) {\r
    Reason = ERR_GET_REASON (ERR_peek_last_error ());\r
    if (Reason == RSA_R_P_NOT_PRIME ||\r
        Reason == RSA_R_Q_NOT_PRIME ||\r
        Reason == RSA_R_N_DOES_NOT_EQUAL_P_Q ||\r
        Reason == RSA_R_D_E_NOT_CONGRUENT_TO_1) {\r
      return FALSE;\r
    }\r
  }\r
\r
  return TRUE;\r
}\r
\r
/**\r
  Carries out the RSA-SSA signature generation with EMSA-PKCS1-v1_5 encoding scheme.\r
\r
  This function carries out the RSA-SSA signature generation with EMSA-PKCS1-v1_5 encoding scheme defined in\r
  RSA PKCS#1.\r
  If the Signature buffer is too small to hold the contents of signature, FALSE\r
  is returned and SigSize is set to the required buffer size to obtain the signature.\r
\r
  If RsaContext is NULL, then return FALSE.\r
  If MessageHash 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
  If SigSize is large enough but Signature is NULL, then return FALSE.\r
\r
  @param[in]       RsaContext   Pointer to RSA context for signature generation.\r
  @param[in]       MessageHash  Pointer to octet message hash to be signed.\r
  @param[in]       HashSize     Size of the message hash in bytes.\r
  @param[out]      Signature    Pointer to buffer to receive RSA PKCS1-v1_5 signature.\r
  @param[in, out]  SigSize      On input, the size of Signature buffer in bytes.\r
                                On output, the size of data returned in Signature buffer in bytes.\r
\r
  @retval  TRUE   Signature successfully generated in PKCS1-v1_5.\r
  @retval  FALSE  Signature generation failed.\r
  @retval  FALSE  SigSize is too small.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
RsaPkcs1Sign (\r
  IN      VOID         *RsaContext,\r
  IN      CONST UINT8  *MessageHash,\r
  IN      UINTN        HashSize,\r
  OUT     UINT8        *Signature,\r
  IN OUT  UINTN        *SigSize\r
  )\r
{\r
  RSA      *Rsa;\r
  UINTN    Size;\r
  INT32    DigestType;\r
\r
  //\r
  // Check input parameters.\r
  //\r
  if (RsaContext == NULL || MessageHash == NULL) {\r
    return FALSE;\r
  }\r
\r
  Rsa = (RSA *) RsaContext;\r
  Size = BN_num_bytes (Rsa->n);\r
\r
  if (*SigSize < Size) {\r
    *SigSize = Size;\r
    return FALSE;\r
  }\r
  \r
  if (Signature == NULL) {\r
    return FALSE;\r
  }\r
  \r
  //\r
  // Determine the message digest algorithm according to digest size.\r
  //   Only MD5, SHA-1 or SHA-256 algorithm is supported. \r
  //\r
  switch (HashSize) {\r
  case MD5_DIGEST_SIZE:\r
    DigestType = NID_md5;\r
    break;\r
    \r
  case SHA1_DIGEST_SIZE:\r
    DigestType = NID_sha1;\r
    break;\r
    \r
  case SHA256_DIGEST_SIZE:\r
    DigestType = NID_sha256;\r
    break;\r
\r
  default:\r
    return FALSE;\r
  }  \r
\r
  return (BOOLEAN) RSA_sign (\r
                     DigestType,\r
                     MessageHash,\r
                     (UINT32) HashSize,\r
                     Signature,\r
                     (UINT32 *) SigSize,\r
                     (RSA *) RsaContext\r
                     );\r
}\r
Commit	Line	Data
532616bb	1	/** @file\r
	2	RSA Asymmetric Cipher Wrapper Implementation over OpenSSL.\r
	3	\r
	4	This file implements following APIs which provide more capabilities for RSA:\r
	5	1) RsaGetKey\r
	6	2) RsaGenerateKey\r
	7	3) RsaCheckKey\r
	8	4) RsaPkcs1Sign\r
	9	\r
86b5c3ee	10	Copyright (c) 2009 - 2013, Intel Corporation. All rights reserved.<BR>\r
532616bb	11	This program and the accompanying materials\r
	12	are licensed and made available under the terms and conditions of the BSD License\r
	13	which accompanies this distribution. The full text of the license may be found at\r
	14	http://opensource.org/licenses/bsd-license.php\r
	15	\r
	16	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	17	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	18	\r
	19	**/\r
	20	\r
	21	#include "InternalCryptLib.h"\r
	22	\r
	23	#include <openssl/rsa.h>\r
	24	#include <openssl/err.h>\r
86b5c3ee	25	#include <openssl/objects.h>\r
532616bb	26	\r
	27	/**\r
	28	Gets the tag-designated RSA key component from the established RSA context.\r
	29	\r
	30	This function retrieves the tag-designated RSA key component from the\r
	31	established RSA context as a non-negative integer (octet string format\r
	32	represented in RSA PKCS#1).\r
	33	If specified key component has not been set or has been cleared, then returned\r
	34	BnSize is set to 0.\r
	35	If the BigNumber buffer is too small to hold the contents of the key, FALSE\r
	36	is returned and BnSize is set to the required buffer size to obtain the key.\r
	37	\r
	38	If RsaContext is NULL, then return FALSE.\r
	39	If BnSize is NULL, then return FALSE.\r
	40	If BnSize is large enough but BigNumber is NULL, then return FALSE.\r
	41	\r
	42	@param[in, out] RsaContext Pointer to RSA context being set.\r
	43	@param[in] KeyTag Tag of RSA key component being set.\r
	44	@param[out] BigNumber Pointer to octet integer buffer.\r
	45	@param[in, out] BnSize On input, the size of big number buffer in bytes.\r
	46	On output, the size of data returned in big number buffer in bytes.\r
	47	\r
	48	@retval TRUE RSA key component was retrieved successfully.\r
	49	@retval FALSE Invalid RSA key component tag.\r
	50	@retval FALSE BnSize is too small.\r
	51	\r
	52	**/\r
	53	BOOLEAN\r
	54	EFIAPI\r
	55	RsaGetKey (\r
	56	IN OUT VOID *RsaContext,\r
	57	IN RSA_KEY_TAG KeyTag,\r
	58	OUT UINT8 *BigNumber,\r
	59	IN OUT UINTN *BnSize\r
	60	)\r
	61	{\r
	62	RSA *RsaKey;\r
	63	BIGNUM *BnKey;\r
	64	UINTN Size;\r
	65	\r
	66	//\r
	67	// Check input parameters.\r
	68	//\r
	69	if (RsaContext == NULL \|\| BnSize == NULL) {\r
	70	return FALSE;\r
	71	}\r
	72	\r
	73	RsaKey = (RSA *) RsaContext;\r
	74	Size = *BnSize;\r
	75	*BnSize = 0;\r
	76	\r
	77	switch (KeyTag) {\r
	78	\r
	79	//\r
	80	// RSA Public Modulus (N)\r
	81	//\r
	82	case RsaKeyN:\r
	83	if (RsaKey->n == NULL) {\r
	84	return TRUE;\r
	85	}\r
	86	BnKey = RsaKey->n;\r
	87	break;\r
	88	\r
	89	//\r
90	// RSA Public Exponent (e)\r
91	//\r
92	case RsaKeyE:\r
93	if (RsaKey->e == NULL) {\r
94	return TRUE;\r
95	}\r
96	BnKey = RsaKey->e;\r
97	break;\r
98	\r
99	//\r
100	// RSA Private Exponent (d)\r
101	//\r
102	case RsaKeyD:\r
103	if (RsaKey->d == NULL) {\r
104	return TRUE;\r
105	}\r
106	BnKey = RsaKey->d;\r
107	break;\r
108	\r
109	//\r
110	// RSA Secret Prime Factor of Modulus (p)\r
111	//\r
112	case RsaKeyP:\r
113	if (RsaKey->p == NULL) {\r
114	return TRUE;\r
115	}\r
116	BnKey = RsaKey->p;\r
117	break;\r
118	\r
119	//\r
120	// RSA Secret Prime Factor of Modules (q)\r
121	//\r
122	case RsaKeyQ:\r
123	if (RsaKey->q == NULL) {\r
124	return TRUE;\r
125	}\r
126	BnKey = RsaKey->q;\r
127	break;\r
128	\r
129	//\r
130	// p's CRT Exponent (== d mod (p - 1))\r
131	//\r
132	case RsaKeyDp:\r
133	if (RsaKey->dmp1 == NULL) {\r
134	return TRUE;\r
135	}\r
136	BnKey = RsaKey->dmp1;\r
137	break;\r
138	\r
139	//\r
140	// q's CRT Exponent (== d mod (q - 1))\r
141	//\r
142	case RsaKeyDq:\r
143	if (RsaKey->dmq1 == NULL) {\r
144	return TRUE;\r
145	}\r
146	BnKey = RsaKey->dmq1;\r
147	break;\r
148	\r
149	//\r
150	// The CRT Coefficient (== 1/q mod p)\r
151	//\r
152	case RsaKeyQInv:\r
153	if (RsaKey->iqmp == NULL) {\r
154	return TRUE;\r
155	}\r
156	BnKey = RsaKey->iqmp;\r
157	break;\r
158	\r
159	default:\r
160	return FALSE;\r
161	}\r
162	\r
163	*BnSize = Size;\r
164	Size = BN_num_bytes (BnKey);\r
165	\r
166	if (*BnSize < Size) {\r
167	*BnSize = Size;\r
168	return FALSE;\r
169	}\r
170	\r
171	if (BigNumber == NULL) {\r
172	return FALSE;\r
173	}\r
174	*BnSize = BN_bn2bin (BnKey, BigNumber) ;\r
175	\r
176	return TRUE;\r
177	}\r
178	\r
179	/**\r
180	Generates RSA key components.\r
181	\r
182	This function generates RSA key components. It takes RSA public exponent E and\r
183	length in bits of RSA modulus N as input, and generates all key components.\r
184	If PublicExponent is NULL, the default RSA public exponent (0x10001) will be used.\r
185	\r
186	Before this function can be invoked, pseudorandom number generator must be correctly\r
187	initialized by RandomSeed().\r
188	\r
189	If RsaContext is NULL, then return FALSE.\r
190	\r
191	@param[in, out] RsaContext Pointer to RSA context being set.\r
192	@param[in] ModulusLength Length of RSA modulus N in bits.\r
193	@param[in] PublicExponent Pointer to RSA public exponent.\r
194	@param[in] PublicExponentSize Size of RSA public exponent buffer in bytes. \r
195	\r
196	@retval TRUE RSA key component was generated successfully.\r
197	@retval FALSE Invalid RSA key component tag.\r
198	\r
199	**/\r
200	BOOLEAN\r
201	EFIAPI\r
202	RsaGenerateKey (\r
203	IN OUT VOID *RsaContext,\r
204	IN UINTN ModulusLength,\r
205	IN CONST UINT8 *PublicExponent,\r
206	IN UINTN PublicExponentSize\r
207	)\r
208	{\r
209	BIGNUM *KeyE;\r
210	BOOLEAN RetVal;\r
211	\r
212	//\r
213	// Check input parameters.\r
214	//\r
dda39f3a	215	if (RsaContext == NULL \|\| ModulusLength > INT_MAX \|\| PublicExponentSize > INT_MAX) {\r
532616bb	216	return FALSE;\r
	217	}\r
	218	\r
	219	KeyE = BN_new ();\r
dda39f3a	220	if (KeyE == NULL) {\r
	221	return FALSE;\r
	222	}\r
	223	\r
	224	RetVal = FALSE;\r
	225	\r
532616bb	226	if (PublicExponent == NULL) {\r
dda39f3a	227	if (BN_set_word (KeyE, 0x10001) == 0) {\r
	228	goto _Exit;\r
	229	}\r
532616bb	230	} else {\r
dda39f3a	231	if (BN_bin2bn (PublicExponent, (UINT32) PublicExponentSize, KeyE) == NULL) {\r
	232	goto _Exit;\r
	233	}\r
532616bb	234	}\r
532616bb	235	\r
532616bb	236	if (RSA_generate_key_ex ((RSA *) RsaContext, (UINT32) ModulusLength, KeyE, NULL) == 1) {\r
	237	RetVal = TRUE;\r
	238	}\r
	239	\r
dda39f3a	240	_Exit:\r
532616bb	241	BN_free (KeyE);\r
	242	return RetVal;\r
	243	}\r
	244	\r
	245	/**\r
	246	Validates key components of RSA context.\r
	247	\r
	248	This function validates key compoents of RSA context in following aspects:\r
	249	- Whether p is a prime\r
	250	- Whether q is a prime\r
	251	- Whether n = p * q\r
	252	- Whether d*e = 1 mod lcm(p-1,q-1)\r
	253	\r
	254	If RsaContext is NULL, then return FALSE.\r
	255	\r
	256	@param[in] RsaContext Pointer to RSA context to check.\r
	257	\r
	258	@retval TRUE RSA key components are valid.\r
	259	@retval FALSE RSA key components are not valid.\r
	260	\r
	261	**/\r
	262	BOOLEAN\r
	263	EFIAPI\r
	264	RsaCheckKey (\r
	265	IN VOID *RsaContext\r
	266	)\r
	267	{\r
	268	UINTN Reason;\r
	269	\r
	270	//\r
	271	// Check input parameters.\r
	272	//\r
	273	if (RsaContext == NULL) {\r
	274	return FALSE;\r
	275	}\r
	276	\r
	277	if (RSA_check_key ((RSA *) RsaContext) != 1) {\r
	278	Reason = ERR_GET_REASON (ERR_peek_last_error ());\r
	279	if (Reason == RSA_R_P_NOT_PRIME \|\|\r
	280	Reason == RSA_R_Q_NOT_PRIME \|\|\r
	281	Reason == RSA_R_N_DOES_NOT_EQUAL_P_Q \|\|\r
	282	Reason == RSA_R_D_E_NOT_CONGRUENT_TO_1) {\r
	283	return FALSE;\r
	284	}\r
	285	}\r
	286	\r
	287	return TRUE;\r
	288	}\r
	289	\r
532616bb	290	/**\r
	291	Carries out the RSA-SSA signature generation with EMSA-PKCS1-v1_5 encoding scheme.\r
	292	\r
	293	This function carries out the RSA-SSA signature generation with EMSA-PKCS1-v1_5 encoding scheme defined in\r
	294	RSA PKCS#1.\r
	295	If the Signature buffer is too small to hold the contents of signature, FALSE\r
	296	is returned and SigSize is set to the required buffer size to obtain the signature.\r
	297	\r
	298	If RsaContext is NULL, then return FALSE.\r
	299	If MessageHash is NULL, then return FALSE.\r
	300	If HashSize is not equal to the size of MD5, SHA-1 or SHA-256 digest, then return FALSE.\r
	301	If SigSize is large enough but Signature is NULL, then return FALSE.\r
	302	\r
	303	@param[in] RsaContext Pointer to RSA context for signature generation.\r
	304	@param[in] MessageHash Pointer to octet message hash to be signed.\r
	305	@param[in] HashSize Size of the message hash in bytes.\r
	306	@param[out] Signature Pointer to buffer to receive RSA PKCS1-v1_5 signature.\r
	307	@param[in, out] SigSize On input, the size of Signature buffer in bytes.\r
	308	On output, the size of data returned in Signature buffer in bytes.\r
	309	\r
	310	@retval TRUE Signature successfully generated in PKCS1-v1_5.\r
	311	@retval FALSE Signature generation failed.\r
	312	@retval FALSE SigSize is too small.\r
	313	\r
	314	**/\r
	315	BOOLEAN\r
	316	EFIAPI\r
	317	RsaPkcs1Sign (\r
	318	IN VOID *RsaContext,\r
	319	IN CONST UINT8 *MessageHash,\r
	320	IN UINTN HashSize,\r
	321	OUT UINT8 *Signature,\r
	322	IN OUT UINTN *SigSize\r
	323	)\r
	324	{\r
	325	RSA *Rsa;\r
	326	UINTN Size;\r
86b5c3ee	327	INT32 DigestType;\r
532616bb	328	\r
	329	//\r
	330	// Check input parameters.\r
	331	//\r
86b5c3ee	332	if (RsaContext == NULL \|\| MessageHash == NULL) {\r
532616bb	333	return FALSE;\r
	334	}\r
	335	\r
	336	Rsa = (RSA *) RsaContext;\r
	337	Size = BN_num_bytes (Rsa->n);\r
	338	\r
	339	if (*SigSize < Size) {\r
	340	*SigSize = Size;\r
	341	return FALSE;\r
	342	}\r
86b5c3ee	343	\r
532616bb	344	if (Signature == NULL) {\r
	345	return FALSE;\r
	346	}\r
86b5c3ee	347	\r
	348	//\r
	349	// Determine the message digest algorithm according to digest size.\r
	350	// Only MD5, SHA-1 or SHA-256 algorithm is supported. \r
	351	//\r
	352	switch (HashSize) {\r
	353	case MD5_DIGEST_SIZE:\r
	354	DigestType = NID_md5;\r
	355	break;\r
	356	\r
	357	case SHA1_DIGEST_SIZE:\r
	358	DigestType = NID_sha1;\r
	359	break;\r
	360	\r
	361	case SHA256_DIGEST_SIZE:\r
	362	DigestType = NID_sha256;\r
	363	break;\r
532616bb	364	\r
86b5c3ee	365	default:\r
532616bb	366	return FALSE;\r
86b5c3ee	367	} \r
	368	\r
	369	return (BOOLEAN) RSA_sign (\r
	370	DigestType,\r
	371	MessageHash,\r
	372	(UINT32) HashSize,\r
	373	Signature,\r
	374	(UINT32 *) SigSize,\r
	375	(RSA *) RsaContext\r
	376	);\r
532616bb	377	}\r