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| author | Giovanni Di Sirio <gdisirio@gmail.com> | 2017-10-22 13:07:41 +0000 |
|---|---|---|
| committer | Giovanni Di Sirio <gdisirio@gmail.com> | 2017-10-22 13:07:41 +0000 |
| commit | 9cbcbc183d7d620448a882ab66aa952a06452c22 (patch) | |
| tree | 69ef5078e4762fbe63e9b7759309436147659443 /os/hal/include | |
| parent | dddff7b1f5fd6a56081b8f2af105e6eb05df904f (diff) | |
| download | ChibiOS-9cbcbc183d7d620448a882ab66aa952a06452c22.tar.gz ChibiOS-9cbcbc183d7d620448a882ab66aa952a06452c22.tar.bz2 ChibiOS-9cbcbc183d7d620448a882ab66aa952a06452c22.zip | |
Added capability for a fall-back crypto implementation.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@10874 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/include')
| -rw-r--r-- | os/hal/include/hal_crypto.h | 67 |
1 files changed, 54 insertions, 13 deletions
diff --git a/os/hal/include/hal_crypto.h b/os/hal/include/hal_crypto.h index 091bc0829..cc2ca5fdf 100644 --- a/os/hal/include/hal_crypto.h +++ b/os/hal/include/hal_crypto.h @@ -31,14 +31,42 @@ /* Driver constants. */
/*===========================================================================*/
+/**
+ * #brief Maximum size of a key for all supported algorithms.
+ */
+#define HAL_CRY_MAX_KEY_SIZE 32
+
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
+/**
+ * @brief Enables the SW fall-back of the cryptographic driver.
+ * @details When enabled, this option, activates a fall-back software
+ * implementation for algorithms not supported by the underlying
+ * hardware.
+ * @note Fall-back implementations may not be present for all algorithms.
+ */
+#if !defined(HAL_CRY_USE_FALLBACK) || defined(__DOXYGEN__)
+#define HAL_CRY_USE_FALLBACK FALSE
+#endif
+
+/**
+ * @brief Makes the driver forcibly use the fall-back implementations.
+ */
+#if !defined(HAL_CRY_ENFORCE_FALLBACK) || defined(__DOXYGEN__)
+#define HAL_CRY_ENFORCE_FALLBACK FALSE
+#endif
+
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
+#if HAL_CRY_ENFORCE_FALLBACK == TRUE
+#undef HAL_CRY_USE_FALLBACK
+#define HAL_CRY_USE_FALLBACK TRUE
+#endif
+
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
@@ -74,7 +102,33 @@ typedef enum { cry_algo_tripledes
} cryalgorithm_t;
+#if HAL_CRY_ENFORCE_FALLBACK == FALSE
+/* Use the defined low level driver.*/
#include "hal_crypto_lld.h"
+#else
+/* No LLD at all, using the standalone mode.*/
+
+#define CRY_LLD_SUPPORTS_AES_ECB FALSE
+#define CRY_LLD_SUPPORTS_AES_CBC FALSE
+#define CRY_LLD_SUPPORTS_AES_CFB FALSE
+#define CRY_LLD_SUPPORTS_AES_CTR FALSE
+
+typedef uint_fast8_t crykey_t;
+
+typedef struct CRYDriver CRYDriver;
+
+typedef struct {
+ uint32_t dummy;
+} CRYConfig;
+
+struct CRYDriver {
+ crystate_t state;
+ const CRYConfig *config;
+ cryalgorithm_t key0_type;
+ size_t key0_size;
+ uint8_t key0_buffer[HAL_CRY_MAX_KEY_SIZE];
+};
+#endif
#if !defined(CRY_LLD_SUPPORTS_AES_ECB) || \
!defined(CRY_LLD_SUPPORTS_AES_CBC) || \
@@ -104,13 +158,10 @@ extern "C" { void cryObjectInit(CRYDriver *cryp);
void cryStart(CRYDriver *cryp, const CRYConfig *config);
void cryStop(CRYDriver *cryp);
-
cryerror_t cryLoadTransientKey(CRYDriver *cryp,
cryalgorithm_t algorithm,
size_t size,
const uint8_t *keyp);
-
-#if CRY_LLD_SUPPORTS_AES_ECB == TRUE
cryerror_t cryEncryptAES_ECB(CRYDriver *cryp,
crykey_t key_id,
size_t size,
@@ -121,9 +172,6 @@ extern "C" { size_t size,
const uint8_t *in,
uint8_t *out);
-#endif /* CRY_LLD_SUPPORTS_AES_ECB == TRUE */
-
-#if CRY_LLD_SUPPORTS_AES_CBC == TRUE
cryerror_t cryEncryptAES_CBC(CRYDriver *cryp,
crykey_t key_id,
size_t size,
@@ -136,9 +184,6 @@ extern "C" { const uint8_t *in,
uint8_t *out,
const uint8_t *iv);
-#endif /* CRY_LLD_SUPPORTS_AES_CBC == TRUE */
-
-#if CRY_LLD_SUPPORTS_AES_CFB == TRUE
cryerror_t cryEncryptAES_CFB(CRYDriver *cryp,
crykey_t key_id,
size_t size,
@@ -151,9 +196,6 @@ extern "C" { const uint8_t *in,
uint8_t *out,
const uint8_t *iv);
-#endif /* CRY_LLD_SUPPORTS_AES_CFB == TRUE */
-
-#if CRY_LLD_SUPPORTS_AES_CTR == TRUE
cryerror_t cryEncryptAES_CTR(CRYDriver *cryp,
crykey_t key_id,
size_t size,
@@ -168,7 +210,6 @@ extern "C" { uint8_t *out,
const uint8_t *nonce,
uint8_t *cnt);
-#endif /* CRY_LLD_SUPPORTS_AES_CTR == TRUE */
#ifdef __cplusplus
}
#endif
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