crypto: export crc32 from /dev/crypto

Signed-off-by: makejian <makejian@xiaomi.com>

crypto/cryptodev.c

@@ -255,6 +255,7 @@ static int cryptof_ioctl(FAR struct file *filep,
             case CRYPTO_SHA2_256:
             case CRYPTO_SHA2_384:
             case CRYPTO_SHA2_512:
+            case CRYPTO_CRC32:
               thash = true;
               break;
             default:

crypto/cryptosoft.c

@@ -835,6 +835,10 @@ int swcr_newsession(FAR uint32_t *sid, FAR struct cryptoini *cri)
             axf = &auth_hash_poly1305;
             goto auth4common;
 
+          case CRYPTO_CRC32:
+            axf = &auth_hash_crc32;
+            goto auth4common;
+
           case CRYPTO_CHACHA20_POLY1305_MAC:
             axf = &auth_hash_chacha20_poly1305;
 
@@ -956,6 +960,7 @@ int swcr_freesession(uint64_t tid)
           case CRYPTO_SHA2_256:
           case CRYPTO_SHA2_384:
           case CRYPTO_SHA2_512:
+          case CRYPTO_CRC32:
             axf = swd->sw_axf;
 
             if (swd->sw_ictx)
@@ -1090,6 +1095,7 @@ int swcr_process(struct cryptop *crp)
           case CRYPTO_SHA2_256:
           case CRYPTO_SHA2_384:
           case CRYPTO_SHA2_512:
+          case CRYPTO_CRC32:
             if ((crp->crp_etype = swcr_hash(crp, crd, sw,
                 crp->crp_buf)) != 0)
               {
@@ -1230,6 +1236,7 @@ void swcr_init(void)
   algs[CRYPTO_SHA2_256] = CRYPTO_ALG_FLAG_SUPPORTED;
   algs[CRYPTO_SHA2_384] = CRYPTO_ALG_FLAG_SUPPORTED;
   algs[CRYPTO_SHA2_512] = CRYPTO_ALG_FLAG_SUPPORTED;
+  algs[CRYPTO_CRC32] = CRYPTO_ALG_FLAG_SUPPORTED;
   algs[CRYPTO_ESN] = CRYPTO_ALG_FLAG_SUPPORTED;
 
   crypto_register(swcr_id, algs, swcr_newsession,

crypto/xform.c

@@ -72,9 +72,16 @@
 #include <crypto/gmac.h>
 #include <crypto/chachapoly.h>
 #include <crypto/poly1305.h>
+#include <nuttx/crc32.h>
 
 #include "des_locl.h"
 
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define CRC32_XOR_VALUE 0xFFFFFFFFUL
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -129,6 +136,9 @@ int sha224update_int(FAR void *, FAR const uint8_t *, size_t);
 int sha256update_int(FAR void *, FAR const uint8_t *, size_t);
 int sha384update_int(FAR void *, FAR const uint8_t *, size_t);
 int sha512update_int(FAR void *, FAR const uint8_t *, size_t);
+void crc32setkey(FAR void *, FAR const uint8_t *, uint16_t);
+int crc32update(FAR void *, FAR const uint8_t *, size_t);
+void crc32final(FAR uint8_t *, FAR void *);
 
 struct aes_ctr_ctx
 {
@@ -457,6 +467,13 @@ const struct auth_hash auth_hash_sha2_512 =
   (void (*)(FAR uint8_t *, FAR void *)) sha512final
 };
 
+const struct auth_hash auth_hash_crc32 =
+{
+  CRYPTO_CRC32, "CRC32",
+  0, 32, 0, sizeof(uint32_t), 1,
+  null_init, crc32setkey, NULL, crc32update, crc32final
+};
+
 /* Encryption wrapper routines. */
 
 void des3_encrypt(caddr_t key, FAR uint8_t *blk)
@@ -879,3 +896,24 @@ int sha512update_int(FAR void *ctx, FAR const uint8_t *buf, size_t len)
   sha512update(ctx, buf, len);
   return 0;
 }
+
+void crc32setkey(FAR void *ctx, FAR const uint8_t *key, uint16_t len)
+{
+  FAR uint32_t *val = (FAR uint32_t *)key;
+  uint32_t tmp = (*val) ^ CRC32_XOR_VALUE;
+  memcpy(ctx, &tmp, len);
+}
+
+int crc32update(FAR void *ctx, FAR const uint8_t *buf, size_t len)
+{
+  FAR uint32_t *startval = (FAR uint32_t *)ctx;
+  *startval = crc32part(buf, len, *startval);
+  return 0;
+}
+
+void crc32final(FAR uint8_t *digest, FAR void *ctx)
+{
+  FAR uint32_t *val = (FAR uint32_t *)ctx;
+  uint32_t result = (*val) ^ CRC32_XOR_VALUE;
+  memcpy(digest, &result, sizeof(uint32_t));
+}

include/crypto/cryptodev.h

@@ -124,8 +124,9 @@
 #define CRYPTO_SHA2_256         31
 #define CRYPTO_SHA2_384         32
 #define CRYPTO_SHA2_512         33
-#define CRYPTO_ESN              34 /* Support for Extended Sequence Numbers */
+#define CRYPTO_CRC32            34
-#define CRYPTO_ALGORITHM_MAX    34 /* Keep updated */
+#define CRYPTO_ESN              35 /* Support for Extended Sequence Numbers */
+#define CRYPTO_ALGORITHM_MAX    35 /* Keep updated */
 
 /* Algorithm flags */
 

include/crypto/xform.h

@@ -128,5 +128,6 @@ extern const struct auth_hash auth_hash_sha2_224;
 extern const struct auth_hash auth_hash_sha2_256;
 extern const struct auth_hash auth_hash_sha2_384;
 extern const struct auth_hash auth_hash_sha2_512;
+extern const struct auth_hash auth_hash_crc32;
 
 #endif /* __INCLUDE_CRYPTO_XFORM_H */