198 lines
6.4 KiB
C
198 lines
6.4 KiB
C
/* stm32.h
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*
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* Copyright (C) 2006-2023 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifndef _WOLFPORT_STM32_H_
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#define _WOLFPORT_STM32_H_
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/* Generic STM32 Hashing and Crypto Functions */
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/* Supports CubeMX HAL or Standard Peripheral Library */
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#include <wolfssl/wolfcrypt/settings.h>
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#include <wolfssl/wolfcrypt/types.h> /* for MATH_INT_T */
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#ifdef STM32_HASH
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#define WOLFSSL_NO_HASH_RAW
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#ifdef HASH_DIGEST
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/* The HASH_DIGEST register indicates SHA224/SHA256 support */
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#define STM32_HASH_SHA2
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#if defined(WOLFSSL_STM32H5)
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#define HASH_CR_SIZE 103
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#define HASH_MAX_DIGEST 64 /* Up to SHA512 */
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#else
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#define HASH_CR_SIZE 54
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#define HASH_MAX_DIGEST 32
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#endif
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#else
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#define HASH_CR_SIZE 50
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#define HASH_MAX_DIGEST 20
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#endif
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/* Handle hash differences between CubeMX and StdPeriLib */
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#if !defined(HASH_ALGOMODE_HASH) && defined(HASH_AlgoMode_HASH)
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#define HASH_ALGOMODE_HASH HASH_AlgoMode_HASH
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#endif
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#if !defined(HASH_DATATYPE_8B)
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#if defined(HASH_DataType_8b)
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#define HASH_DATATYPE_8B HASH_DataType_8b
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#elif defined(HASH_BYTE_SWAP)
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#define HASH_DATATYPE_8B HASH_BYTE_SWAP
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#endif
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#endif
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#ifndef HASH_STR_NBW
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#define HASH_STR_NBW HASH_STR_NBLW
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#endif
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#ifndef STM32_HASH_TIMEOUT
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#define STM32_HASH_TIMEOUT 0xFFFF
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#endif
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/* STM32 register size in bytes */
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#define STM32_HASH_REG_SIZE 4
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#define STM32_HASH_FIFO_SIZE 16 /* FIFO is 16 deep 32-bits wide */
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#if (defined(WOLFSSL_STM32U5) || defined(WOLFSSL_STM32H5) || \
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defined(WOLFSSL_STM32H7)) && !defined(NO_STM32_HASH_FIFO_WORKAROUND)
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/* workaround for hash FIFO to write one extra to finalize */
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/* RM: Message Data Feeding: Data are entered into the HASH
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* one 32-bit word at a time, by writing them into the HASH_DIN register.
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* The current contents of the HASH_DIN register are transferred to the
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* 16 words input FIFO each time the register is written with new data.
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* Hence HASH_DIN and the FIFO form a seventeen 32-bit words length FIFO. */
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#undef STM32_HASH_BUFFER_SIZE
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#define STM32_HASH_BUFFER_SIZE 17
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#undef STM32_HASH_FIFO_WORKAROUND
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#define STM32_HASH_FIFO_WORKAROUND
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#endif
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#ifndef STM32_HASH_BUFFER_SIZE
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#define STM32_HASH_BUFFER_SIZE STM32_HASH_FIFO_SIZE
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#endif
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/* STM32 Hash Context */
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typedef struct {
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/* Context switching registers */
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uint32_t HASH_IMR;
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uint32_t HASH_STR;
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uint32_t HASH_CR;
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uint32_t HASH_CSR[HASH_CR_SIZE];
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/* Hash state / buffers */
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word32 buffer[STM32_HASH_BUFFER_SIZE]; /* partial word buffer */
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word32 buffLen; /* partial word remain */
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word32 loLen; /* total update bytes
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(only lsb 6-bits is used for nbr valid bytes in last word) */
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#ifdef STM32_HASH_FIFO_WORKAROUND
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int fifoBytes; /* number of currently filled FIFO bytes */
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#endif
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} STM32_HASH_Context;
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/* API's */
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void wc_Stm32_Hash_Init(STM32_HASH_Context* stmCtx);
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int wc_Stm32_Hash_Update(STM32_HASH_Context* stmCtx, word32 algo,
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const byte* data, word32 len, word32 blockSize);
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int wc_Stm32_Hash_Final(STM32_HASH_Context* stmCtx, word32 algo,
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byte* hash, word32 digestSize);
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#endif /* STM32_HASH */
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#ifdef STM32_CRYPTO
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#ifndef NO_AES
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#if !defined(STM32_CRYPTO_AES_GCM) && (defined(WOLFSSL_STM32F4) || \
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defined(WOLFSSL_STM32F7) || defined(WOLFSSL_STM32L4) || \
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defined(WOLFSSL_STM32L5) || defined(WOLFSSL_STM32H7) || \
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defined(WOLFSSL_STM32U5))
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/* Hardware supports AES GCM acceleration */
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#define STM32_CRYPTO_AES_GCM
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#endif
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#if defined(WOLFSSL_STM32WB) || defined(WOLFSSL_STM32WL)
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#define STM32_CRYPTO_AES_ONLY /* crypto engine only supports AES */
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#ifdef WOLFSSL_STM32WB
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#define CRYP AES1
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#else
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#define CRYP AES
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#endif
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#define STM32_HAL_V2
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#endif
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#if defined(WOLFSSL_STM32L4) || defined(WOLFSSL_STM32L5) || \
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defined(WOLFSSL_STM32U5)
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#if defined(WOLFSSL_STM32L4) || defined(WOLFSSL_STM32U5)
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#define STM32_CRYPTO_AES_ONLY /* crypto engine only supports AES */
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#endif
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#define CRYP AES
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#ifndef CRYP_AES_GCM
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#define CRYP_AES_GCM CRYP_AES_GCM_GMAC
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#endif
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#endif
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/* Detect newer CubeMX crypto HAL (HAL_CRYP_Encrypt / HAL_CRYP_Decrypt) */
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#if !defined(STM32_HAL_V2) && defined(CRYP_AES_GCM) && \
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(defined(WOLFSSL_STM32F7) || defined(WOLFSSL_STM32L5) || \
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defined(WOLFSSL_STM32H7) || defined(WOLFSSL_STM32U5)) || \
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defined(WOLFSSL_STM32H5)
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#define STM32_HAL_V2
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#endif
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/* The datatype for STM32 CubeMX HAL Crypt calls */
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#ifdef STM32_HAL_V2
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#define STM_CRYPT_TYPE uint32_t
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#else
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#define STM_CRYPT_TYPE uint8_t
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#endif
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/* CRYPT_AES_GCM starts the IV with 2 */
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#define STM32_GCM_IV_START 2
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struct Aes;
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#ifdef WOLFSSL_STM32_CUBEMX
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int wc_Stm32_Aes_Init(struct Aes* aes, CRYP_HandleTypeDef* hcryp);
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void wc_Stm32_Aes_Cleanup(void);
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#else /* Standard Peripheral Library */
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int wc_Stm32_Aes_Init(struct Aes* aes, CRYP_InitTypeDef* cryptInit,
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CRYP_KeyInitTypeDef* keyInit);
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void wc_Stm32_Aes_Cleanup(void);
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#endif /* WOLFSSL_STM32_CUBEMX */
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#endif /* !NO_AES */
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#endif /* STM32_CRYPTO */
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#if defined(WOLFSSL_STM32_PKA) && defined(HAVE_ECC)
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struct ecc_key;
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struct WC_RNG;
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int stm32_ecc_verify_hash_ex(MATH_INT_T *r, MATH_INT_T *s, const byte* hash,
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word32 hashlen, int* res, struct ecc_key* key);
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int stm32_ecc_sign_hash_ex(const byte* hash, word32 hashlen, struct WC_RNG* rng,
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struct ecc_key* key, MATH_INT_T *r, MATH_INT_T *s);
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#endif /* WOLFSSL_STM32_PKA && HAVE_ECC */
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#endif /* _WOLFPORT_STM32_H_ */
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