Initial support for STM32MP13 HAL

This adds support for the STM32MP13 HAL, tested on the STM32MP135F MPU.

Using the HAL this modifies our previous RNG, AES-CBC, AES-GCM, HASH,
ECDSA and DES3 ST HAL acceleration to work with the MPU. It also works
around bugs found in the AES-GCM code of the HAL.

The HAL does not appear to have support for MD5 HASH at the moment, so
this has been given a flag to disable it on this MPU.

Author: LinuxJedi

.wolfssl_known_macro_extras

@@ -869,6 +869,7 @@ __ARCH_STRNCPY_NO_REDIRECT
 __ARCH_STRSTR_NO_REDIRECT
 __ARM_ARCH_7M__
 __ARM_FEATURE_CRYPTO
+__ASSEMBLER__
 __ATOMIC_RELAXED
 __AVR__
 __BCPLUSPLUS__

wolfcrypt/src/aes.c

@@ -8161,8 +8161,18 @@ static WARN_UNUSED_RESULT int wc_AesGcmEncrypt_STM32(
 
     /* Authentication buffer - must be 4-byte multiple zero padded */
     authPadSz = authInSz % sizeof(word32);
+#ifdef WOLFSSL_STM32MP13
+    /* STM32MP13 HAL at least v1.2 and lower has a bug with which it needs a
+     * minimum of 16 bytes for the auth
+     */
+    if ((authInSz > 0) && (authInSz < 16)) {
+        authPadSz = 16 - authInSz;
+    }
+#endif
     if (authPadSz != 0) {
-        authPadSz = authInSz + sizeof(word32) - authPadSz;
+        if (authPadSz < authInSz + sizeof(word32)) {
+            authPadSz = authInSz + sizeof(word32) - authPadSz;
+        }
         if (authPadSz <= sizeof(authhdr)) {
             authInPadded = (byte*)authhdr;
         }
@@ -8185,11 +8195,12 @@ static WARN_UNUSED_RESULT int wc_AesGcmEncrypt_STM32(
     /* for cases where hardware cannot be used for authTag calculate it */
     /* if IV is not 12 calculate GHASH using software */
     if (ivSz != GCM_NONCE_MID_SZ
-    #ifndef CRYP_HEADERWIDTHUNIT_BYTE
+    #if !defined(CRYP_HEADERWIDTHUNIT_BYTE) || defined(WOLFSSL_STM32MP13)
         /* or hardware that does not support partial block */
         || sz == 0 || partial != 0
     #endif
-    #if !defined(CRYP_HEADERWIDTHUNIT_BYTE) && !defined(STM32_AESGCM_PARTIAL)
+    #if (!defined(CRYP_HEADERWIDTHUNIT_BYTE) || defined(WOLFSSL_STM32MP13)) \
+        && !defined(STM32_AESGCM_PARTIAL)
         /* or authIn is not a multiple of 4  */
         || authPadSz != authInSz
     #endif
@@ -8204,13 +8215,14 @@ static WARN_UNUSED_RESULT int wc_AesGcmEncrypt_STM32(
     if (ret != 0) {
         return ret;
     }
+
 #ifdef WOLFSSL_STM32_CUBEMX
     hcryp.Init.pInitVect = (STM_CRYPT_TYPE*)ctr;
     hcryp.Init.Header = (STM_CRYPT_TYPE*)authInPadded;
 
 #if defined(STM32_HAL_V2)
     hcryp.Init.Algorithm = CRYP_AES_GCM;
-    #ifdef CRYP_HEADERWIDTHUNIT_BYTE
+    #if defined(CRYP_HEADERWIDTHUNIT_BYTE) && !defined(WOLFSSL_STM32MP13)
     /* V2 with CRYP_HEADERWIDTHUNIT_BYTE uses byte size for header */
     hcryp.Init.HeaderSize = authInSz;
     #else
@@ -8693,14 +8705,24 @@ static WARN_UNUSED_RESULT int wc_AesGcmDecrypt_STM32(
         authPadSz = authInSz;
     }
 
+#ifdef WOLFSSL_STM32MP13
+    /* STM32MP13 HAL at least v1.2 and lower has a bug with which it needs a
+     * minimum of 16 bytes for the auth
+     */
+    if ((authInSz > 0) && (authInSz < 16)) {
+        authPadSz = 16 - authInSz;
+    }
+#endif
+
     /* for cases where hardware cannot be used for authTag calculate it */
     /* if IV is not 12 calculate GHASH using software */
     if (ivSz != GCM_NONCE_MID_SZ
-    #ifndef CRYP_HEADERWIDTHUNIT_BYTE
+    #if !defined(CRYP_HEADERWIDTHUNIT_BYTE) || defined(WOLFSSL_STM32MP13)
         /* or hardware that does not support partial block */
         || sz == 0 || partial != 0
     #endif
-    #if !defined(CRYP_HEADERWIDTHUNIT_BYTE) && !defined(STM32_AESGCM_PARTIAL)
+    #if (!defined(CRYP_HEADERWIDTHUNIT_BYTE) || defined(WOLFSSL_STM32MP13)) \
+        && !defined(STM32_AESGCM_PARTIAL)
         /* or authIn is not a multiple of 4  */
         || authPadSz != authInSz
     #endif
@@ -8746,7 +8768,7 @@ static WARN_UNUSED_RESULT int wc_AesGcmDecrypt_STM32(
 
 #if defined(STM32_HAL_V2)
     hcryp.Init.Algorithm = CRYP_AES_GCM;
-    #ifdef CRYP_HEADERWIDTHUNIT_BYTE
+    #if defined(CRYP_HEADERWIDTHUNIT_BYTE) && !defined(WOLFSSL_STM32MP13)
     /* V2 with CRYP_HEADERWIDTHUNIT_BYTE uses byte size for header */
     hcryp.Init.HeaderSize = authInSz;
     #else

wolfcrypt/src/des3.c

@@ -163,8 +163,13 @@
                 STM32_HAL_TIMEOUT);
         }
         /* save off IV */
-        des->reg[0] = hcryp.Instance->IV0LR;
-        des->reg[1] = hcryp.Instance->IV0RR;
+        #ifdef WOLFSSL_STM32MP13
+            des->reg[0] = ((CRYP_TypeDef *)(hcryp.Instance))->IV0LR;
+            des->reg[1] = ((CRYP_TypeDef *)(hcryp.Instance))->IV0RR;
+        #else
+            des->reg[0] = hcryp.Instance->IV0LR;
+            des->reg[1] = hcryp.Instance->IV0RR;
+        #endif
     #else
         while (sz > 0) {
             /* if input and output same will overwrite input iv */
@@ -324,8 +329,13 @@
                     STM32_HAL_TIMEOUT);
             }
             /* save off IV */
-            des->reg[0] = hcryp.Instance->IV0LR;
-            des->reg[1] = hcryp.Instance->IV0RR;
+            #ifdef WOLFSSL_STM32MP13
+                des->reg[0] = ((CRYP_TypeDef *)(hcryp.Instance))->IV0LR;
+                des->reg[1] = ((CRYP_TypeDef *)(hcryp.Instance))->IV0RR;
+            #else
+                des->reg[0] = hcryp.Instance->IV0LR;
+                des->reg[1] = hcryp.Instance->IV0RR;
+            #endif
         #else
             while (sz > 0) {
                 if (dir == DES_ENCRYPTION) {

wolfcrypt/src/include.am

@@ -103,6 +103,7 @@ EXTRA_DIST += wolfcrypt/src/port/ti/ti-aes.c \
               wolfcrypt/src/port/st/stm32.c \
               wolfcrypt/src/port/st/stsafe.c \
               wolfcrypt/src/port/st/README.md \
+              wolfcrypt/src/port/st/STM32MP13.md \
               wolfcrypt/src/port/af_alg/afalg_aes.c \
               wolfcrypt/src/port/af_alg/afalg_hash.c \
               wolfcrypt/src/port/kcapi/kcapi_aes.c \

wolfcrypt/src/md5.c

@@ -48,7 +48,7 @@
 
 
 /* Hardware Acceleration */
-#if defined(STM32_HASH)
+#if defined(STM32_HASH) && !defined(STM32_NOMD5)
 
 /* Supports CubeMX HAL or Standard Peripheral Library */
 #define HAVE_MD5_CUST_API

wolfcrypt/src/port/st/README.md

@@ -1,10 +1,12 @@
 # ST Ports
 
-Support for the STM32 L4, F1, F2, F4 and F7 on-board crypto hardware acceleration:
+Support for the STM32 L4, F1, F2, F4, F7 and MP13 on-board crypto hardware
+acceleration:
  - symmetric AES (ECB/CBC/CTR/GCM)
- - MD5/SHA1/SHA224/SHA256
+ - MD5/SHA1/SHA224/SHA256 (MP13 does not have MD5 acceleration)
 
-Support for the STM32 PKA on WB55, H7 and other devices with on-board public-key acceleration:
+Support for the STM32 PKA on WB55, H7, MP13 and other devices with on-board
+public-key acceleration:
  - ECC192/ECC224/ECC256/ECC384
 
 Support for the STSAFE-A100 crypto hardware accelerator co-processor via I2C for ECC supporting NIST or Brainpool 256-bit and 384-bit curves. It requires the ST-Safe SDK including wolf stsafe_interface.c/.h files. Please contact ST for these.