diff options
Diffstat (limited to 'roms/edk2/CryptoPkg/Library/BaseCryptLib/Hash/CryptSha256.c')
| -rw-r--r-- | roms/edk2/CryptoPkg/Library/BaseCryptLib/Hash/CryptSha256.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/roms/edk2/CryptoPkg/Library/BaseCryptLib/Hash/CryptSha256.c b/roms/edk2/CryptoPkg/Library/BaseCryptLib/Hash/CryptSha256.c new file mode 100644 index 000000000..38b9b4d84 --- /dev/null +++ b/roms/edk2/CryptoPkg/Library/BaseCryptLib/Hash/CryptSha256.c @@ -0,0 +1,223 @@ +/** @file
+ SHA-256 Digest Wrapper Implementation over OpenSSL.
+
+Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "InternalCryptLib.h"
+#include <openssl/sha.h>
+
+/**
+ Retrieves the size, in bytes, of the context buffer required for SHA-256 hash operations.
+
+ @return The size, in bytes, of the context buffer required for SHA-256 hash operations.
+
+**/
+UINTN
+EFIAPI
+Sha256GetContextSize (
+ VOID
+ )
+{
+ //
+ // Retrieves OpenSSL SHA-256 Context Size
+ //
+ return (UINTN) (sizeof (SHA256_CTX));
+}
+
+/**
+ Initializes user-supplied memory pointed by Sha256Context as SHA-256 hash context for
+ subsequent use.
+
+ If Sha256Context is NULL, then return FALSE.
+
+ @param[out] Sha256Context Pointer to SHA-256 context being initialized.
+
+ @retval TRUE SHA-256 context initialization succeeded.
+ @retval FALSE SHA-256 context initialization failed.
+
+**/
+BOOLEAN
+EFIAPI
+Sha256Init (
+ OUT VOID *Sha256Context
+ )
+{
+ //
+ // Check input parameters.
+ //
+ if (Sha256Context == NULL) {
+ return FALSE;
+ }
+
+ //
+ // OpenSSL SHA-256 Context Initialization
+ //
+ return (BOOLEAN) (SHA256_Init ((SHA256_CTX *) Sha256Context));
+}
+
+/**
+ Makes a copy of an existing SHA-256 context.
+
+ If Sha256Context is NULL, then return FALSE.
+ If NewSha256Context is NULL, then return FALSE.
+
+ @param[in] Sha256Context Pointer to SHA-256 context being copied.
+ @param[out] NewSha256Context Pointer to new SHA-256 context.
+
+ @retval TRUE SHA-256 context copy succeeded.
+ @retval FALSE SHA-256 context copy failed.
+
+**/
+BOOLEAN
+EFIAPI
+Sha256Duplicate (
+ IN CONST VOID *Sha256Context,
+ OUT VOID *NewSha256Context
+ )
+{
+ //
+ // Check input parameters.
+ //
+ if (Sha256Context == NULL || NewSha256Context == NULL) {
+ return FALSE;
+ }
+
+ CopyMem (NewSha256Context, Sha256Context, sizeof (SHA256_CTX));
+
+ return TRUE;
+}
+
+/**
+ Digests the input data and updates SHA-256 context.
+
+ This function performs SHA-256 digest on a data buffer of the specified size.
+ It can be called multiple times to compute the digest of long or discontinuous data streams.
+ SHA-256 context should be already correctly initialized by Sha256Init(), and should not be finalized
+ by Sha256Final(). Behavior with invalid context is undefined.
+
+ If Sha256Context is NULL, then return FALSE.
+
+ @param[in, out] Sha256Context Pointer to the SHA-256 context.
+ @param[in] Data Pointer to the buffer containing the data to be hashed.
+ @param[in] DataSize Size of Data buffer in bytes.
+
+ @retval TRUE SHA-256 data digest succeeded.
+ @retval FALSE SHA-256 data digest failed.
+
+**/
+BOOLEAN
+EFIAPI
+Sha256Update (
+ IN OUT VOID *Sha256Context,
+ IN CONST VOID *Data,
+ IN UINTN DataSize
+ )
+{
+ //
+ // Check input parameters.
+ //
+ if (Sha256Context == NULL) {
+ return FALSE;
+ }
+
+ //
+ // Check invalid parameters, in case that only DataLength was checked in OpenSSL
+ //
+ if (Data == NULL && DataSize != 0) {
+ return FALSE;
+ }
+
+ //
+ // OpenSSL SHA-256 Hash Update
+ //
+ return (BOOLEAN) (SHA256_Update ((SHA256_CTX *) Sha256Context, Data, DataSize));
+}
+
+/**
+ Completes computation of the SHA-256 digest value.
+
+ This function completes SHA-256 hash computation and retrieves the digest value into
+ the specified memory. After this function has been called, the SHA-256 context cannot
+ be used again.
+ SHA-256 context should be already correctly initialized by Sha256Init(), and should not be
+ finalized by Sha256Final(). Behavior with invalid SHA-256 context is undefined.
+
+ If Sha256Context is NULL, then return FALSE.
+ If HashValue is NULL, then return FALSE.
+
+ @param[in, out] Sha256Context Pointer to the SHA-256 context.
+ @param[out] HashValue Pointer to a buffer that receives the SHA-256 digest
+ value (32 bytes).
+
+ @retval TRUE SHA-256 digest computation succeeded.
+ @retval FALSE SHA-256 digest computation failed.
+
+**/
+BOOLEAN
+EFIAPI
+Sha256Final (
+ IN OUT VOID *Sha256Context,
+ OUT UINT8 *HashValue
+ )
+{
+ //
+ // Check input parameters.
+ //
+ if (Sha256Context == NULL || HashValue == NULL) {
+ return FALSE;
+ }
+
+ //
+ // OpenSSL SHA-256 Hash Finalization
+ //
+ return (BOOLEAN) (SHA256_Final (HashValue, (SHA256_CTX *) Sha256Context));
+}
+
+/**
+ Computes the SHA-256 message digest of a input data buffer.
+
+ This function performs the SHA-256 message digest of a given data buffer, and places
+ the digest value into the specified memory.
+
+ If this interface is not supported, then return FALSE.
+
+ @param[in] Data Pointer to the buffer containing the data to be hashed.
+ @param[in] DataSize Size of Data buffer in bytes.
+ @param[out] HashValue Pointer to a buffer that receives the SHA-256 digest
+ value (32 bytes).
+
+ @retval TRUE SHA-256 digest computation succeeded.
+ @retval FALSE SHA-256 digest computation failed.
+ @retval FALSE This interface is not supported.
+
+**/
+BOOLEAN
+EFIAPI
+Sha256HashAll (
+ IN CONST VOID *Data,
+ IN UINTN DataSize,
+ OUT UINT8 *HashValue
+ )
+{
+ //
+ // Check input parameters.
+ //
+ if (HashValue == NULL) {
+ return FALSE;
+ }
+ if (Data == NULL && DataSize != 0) {
+ return FALSE;
+ }
+
+ //
+ // OpenSSL SHA-256 Hash Computation.
+ //
+ if (SHA256 (Data, DataSize, HashValue) == NULL) {
+ return FALSE;
+ } else {
+ return TRUE;
+ }
+}
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