esp_rom: Add initial ESP32-C3 support

From internal commit 7761d6e8

components/esp_rom/include/esp32c3/rom/sha.h

@@ -0,0 +1,61 @@
+// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#ifndef _ROM_SHA_H_
+#define _ROM_SHA_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "ets_sys.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    SHA1 = 0,
+    SHA2_224,
+    SHA2_256,
+    SHA_TYPE_MAX
+} SHA_TYPE;
+
+typedef struct SHAContext {
+    bool start;
+    bool in_hardware;               // Is this context currently in peripheral? Needs to be manually cleared if multiple SHAs are interleaved
+    SHA_TYPE type;
+    uint32_t state[16];             // For SHA1/SHA224/SHA256, used 8, other used 16
+    unsigned char buffer[128];      // For SHA1/SHA224/SHA256, used 64, other used 128
+    uint32_t total_bits[4];
+} SHA_CTX;
+
+void ets_sha_enable(void);
+
+void ets_sha_disable(void);
+
+ets_status_t ets_sha_init(SHA_CTX *ctx, SHA_TYPE type);
+
+ets_status_t ets_sha_starts(SHA_CTX *ctx, uint16_t sha512_t);
+
+void ets_sha_get_state(SHA_CTX *ctx);
+
+void ets_sha_process(SHA_CTX *ctx, const unsigned char *input);
+
+void ets_sha_update(SHA_CTX *ctx, const unsigned char *input, uint32_t input_bytes, bool update_ctx);
+
+ets_status_t ets_sha_finish(SHA_CTX *ctx, unsigned char *output);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ROM_SHA_H_ */