/** @file\r
SHA-256 Digest Wrapper Implementation over OpenSSL.\r
\r
-Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2009 - 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
\r
**/\r
\r
-#include <Library/BaseLib.h>\r
-#include <Library/DebugLib.h>\r
-\r
-#include <Library/BaseCryptLib.h>\r
+#include "InternalCryptLib.h"\r
#include <openssl/sha.h>\r
\r
-\r
/**\r
- Retrieves the size, in bytes, of the context buffer required for SHA-256 operations.\r
+ Retrieves the size, in bytes, of the context buffer required for SHA-256 hash operations.\r
\r
- @return The size, in bytes, of the context buffer required for SHA-256 operations.\r
+ @return The size, in bytes, of the context buffer required for SHA-256 hash operations.\r
\r
**/\r
UINTN\r
//\r
// Retrieves OpenSSL SHA-256 Context Size\r
//\r
- return (UINTN)(sizeof (SHA256_CTX));\r
+ return (UINTN) (sizeof (SHA256_CTX));\r
}\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 ASSERT().\r
+ If Sha256Context is NULL, then return FALSE.\r
\r
- @param[in, out] Sha256Context Pointer to SHA-256 Context being initialized.\r
+ @param[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
BOOLEAN\r
EFIAPI\r
Sha256Init (\r
- IN OUT VOID *Sha256Context\r
+ OUT VOID *Sha256Context\r
)\r
{\r
//\r
- // ASSERT if Sha256Context is NULL\r
+ // Check input parameters.\r
//\r
- ASSERT (Sha256Context != NULL);\r
+ if (Sha256Context == NULL) {\r
+ return FALSE;\r
+ }\r
\r
//\r
// OpenSSL SHA-256 Context Initialization\r
//\r
- return (BOOLEAN) (SHA256_Init ((SHA256_CTX *)Sha256Context));\r
+ return (BOOLEAN) (SHA256_Init ((SHA256_CTX *) Sha256Context));\r
}\r
\r
+/**\r
+ Makes a copy of an existing SHA-256 context.\r
+\r
+ If Sha256Context is NULL, then return FALSE.\r
+ If NewSha256Context is NULL, then return FALSE.\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 TRUE SHA-256 context copy succeeded.\r
+ @retval FALSE SHA-256 context copy failed.\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+Sha256Duplicate (\r
+ IN CONST VOID *Sha256Context,\r
+ OUT VOID *NewSha256Context\r
+ )\r
+{\r
+ //\r
+ // Check input parameters.\r
+ //\r
+ if (Sha256Context == NULL || NewSha256Context == NULL) {\r
+ return FALSE;\r
+ }\r
+\r
+ CopyMem (NewSha256Context, Sha256Context, sizeof (SHA256_CTX));\r
+\r
+ return TRUE;\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
+ Digests the input data and updates SHA-256 context.\r
\r
- If Sha256Context is NULL, then ASSERT().\r
+ This function performs SHA-256 digest on a data buffer of the specified size.\r
+ It can be called multiple times to compute the digest of long or discontinuous data streams.\r
+ SHA-256 context should be already correctly intialized by Sha256Init(), and should not be finalized\r
+ by Sha256Final(). Behavior with invalid context is undefined.\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
+ @param[in] DataSize Size 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
+ @retval FALSE SHA-256 data digest failed.\r
\r
**/\r
BOOLEAN\r
Sha256Update (\r
IN OUT VOID *Sha256Context,\r
IN CONST VOID *Data,\r
- IN UINTN DataLength\r
+ IN UINTN DataSize\r
)\r
{\r
//\r
- // ASSERT if Sha256Context is NULL\r
+ // Check input parameters.\r
//\r
- ASSERT (Sha256Context != NULL);\r
+ if (Sha256Context == NULL) {\r
+ return FALSE;\r
+ }\r
\r
//\r
- // ASSERT if invalid parameters, in case that only DataLength was checked in OpenSSL\r
+ // Check invalid parameters, in case that only DataLength was checked in OpenSSL\r
//\r
- if (Data == NULL) {\r
- ASSERT (DataLength == 0);\r
+ if (Data == NULL && DataSize != 0) {\r
+ return FALSE;\r
}\r
\r
//\r
// OpenSSL SHA-256 Hash Update\r
//\r
- return (BOOLEAN) (SHA256_Update ((SHA256_CTX *)Sha256Context, Data, DataLength));\r
+ return (BOOLEAN) (SHA256_Update ((SHA256_CTX *) Sha256Context, Data, DataSize));\r
}\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
+ Completes computation of the SHA-256 digest value.\r
\r
- If Sha256Context is NULL, then ASSERT().\r
- If HashValue is NULL, then ASSERT().\r
+ This function completes SHA-256 hash computation and retrieves the digest value into\r
+ the specified memory. After this function has been called, the SHA-256 context cannot\r
+ be used again.\r
+ SHA-256 context should be already correctly intialized by Sha256Init(), and should not be\r
+ finalized by Sha256Final(). Behavior with invalid SHA-256 context is undefined.\r
\r
- @param[in, out] Sha256Context Pointer to SHA-256 context\r
+ If Sha256Context is NULL, then return FALSE.\r
+ If HashValue is NULL, then return FALSE.\r
+\r
+ @param[in, out] Sha256Context Pointer to the SHA-256 context.\r
@param[out] HashValue Pointer to a buffer that receives the SHA-256 digest\r
value (32 bytes).\r
\r
)\r
{\r
//\r
- // ASSERT if Sha256Context is NULL or HashValue is NULL\r
+ // Check input parameters.\r
//\r
- ASSERT (Sha256Context != NULL);\r
- ASSERT (HashValue != NULL);\r
+ if (Sha256Context == NULL || HashValue == NULL) {\r
+ return FALSE;\r
+ }\r
\r
//\r
// OpenSSL SHA-256 Hash Finalization\r
//\r
- return (BOOLEAN) (SHA256_Final (HashValue, (SHA256_CTX *)Sha256Context));\r
+ return (BOOLEAN) (SHA256_Final (HashValue, (SHA256_CTX *) Sha256Context));\r
}\r
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