cc3xx_rsa_impl

platform/ext/target/arm/drivers/cc3xx/common/cc3xx_error.h

@@ -46,6 +46,8 @@ enum cc3xx_error {
     CC3XX_ERR_DRBG_INVALID_ID,
     CC3XX_ERR_DCU_LOCKED,
     CC3XX_ERR_DCU_MASK_MISMATCH,
+    CC3XX_ERR_RSA_ENCODE_MSG_TOO_LONG, 
+    CC3XX_ERR_INVALID_ALGORITHM,
     CC3XX_ERR_MAX_VALUE = UINT32_MAX
 };
 

platform/ext/target/arm/drivers/cc3xx/low_level_driver/CMakeLists.txt

@@ -13,8 +13,8 @@ endif()
 
 target_sources(${CC3XX_TARGET_NAME}
     PRIVATE
-        src/cc3xx_lcs.c
-        src/cc3xx_otp.c
+    #        src/cc3xx_lcs.c
+    #   src/cc3xx_otp.c
         src/cc3xx_rng.c
         src/cc3xx_hash.c
         src/cc3xx_aes.c
@@ -37,18 +37,10 @@ target_sources(${CC3XX_TARGET_NAME}
         src/cc3xx_ec_projective_point.c
         src/cc3xx_ecdh.c
         src/cc3xx_dcu.c
+        src/cc3xx_rsa.c
         ../common/cc3xx_stdlib.c
 )
 
-# This file is the performance-limit for ECDSA, so should be compiled with the
-# highest possible optimizations for speed, even when we are optimizing for
-# code size.
-string(TOLOWER "${CMAKE_BUILD_TYPE}" BUILD_TYPE_LOWER)
-if (${BUILD_TYPE_LOWER} STREQUAL "release" OR ${BUILD_TYPE_LOWER} STREQUAL "minsizerel")
-    set_source_files_properties(src/cc3xx_pka.c
-        PROPERTIES COMPILE_FLAGS -Ofast
-    )
-endif()
 
 target_include_directories(${CC3XX_TARGET_NAME}
     PUBLIC

platform/ext/target/arm/drivers/cc3xx/low_level_driver/include/cc3xx_pka.h

@@ -95,7 +95,7 @@ void cc3xx_lowlevel_pka_write_reg_swap_endian(cc3xx_pka_reg_id_t reg_id, const u
 /**
  * @brief                        Read data from a PKA register.
  *
- * @param[in]  id                The register ID to write data into.
+ * @param[in]  id                The register ID to write data into.  TYPO???? TO READ DATA FROM MAYBE? 
  * @param[out] data              Buffer the data will be written into.
  * @param[in]  len               The size in bytes of the data to be read. Must
  *                               be a multiple of sizeof(uint32_t). The buffer

platform/ext/target/arm/drivers/cc3xx/low_level_driver/include/cc3xx_rsa.h

@@ -0,0 +1,36 @@
+// #ifdef USE_PSA_CRYPTOCELL
+// #include "psa/crypto.h"
+// #include "psa_crypto_driver_wrappers.h"
+// #endif
+
+
+#include <stdint.h>
+#include <stddef.h>
+#include <cc3xx_pka.h>
+
+/*Should I just throw an error or ignore this? If this is not defined
+bigger problems probably exists*/
+#ifndef PSA_MAX_RSA_KEY_BITS
+    #define PSA_MAX_RSA_KEY_BITS 2048
+#endif
+
+/*There has to exist macro for this "8" --can use "#define PKA_WORD_SIZE  8"
+but that's defined in a cc3xx_pka.c file? Should I move it to header file?*/
+#define PSA_MAX_RSA_KEY_BYTES PSA_MAX_RSA_KEY_BITS/8
+#define PSA_MAX_RSA_KEY_WORDS PSA_MAX_RSA_KEY_BYTES/sizeof(uint32_t)
+
+cc3xx_err_t  cc3xx_lowlevel_rsa_pkcs1v15_encode(
+    const uint8_t *input, /* Message   */
+    size_t input_size, /* Lenght of the message to encode inn octets */
+    uint32_t  encoded_msg_length, /* Intended length of the encoded msg*/
+    psa_algorithm_t hash_alg, /*The hash alh used*/
+    uint8_t *output_buf /* Pointer to the output buffer */
+
+);
+
+cc3xx_err_t  cc3xx_lowlevel_rsa_sign(
+    const uint8_t *key,  /* Priv key id */
+    const uint8_t *input, /* DataIn to encrypt */
+    size_t input_size,
+    uint32_t *signature /* Buffer for data out */
+    );