Initial Esp32c3 Support (#5060)

tools/sdk/esp32c3/include/esp-tls/esp-tls-crypto/esp_tls_crypto.h

@@ -0,0 +1,68 @@
+// 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 _ESP_TLS_CRYPTO_H
+#define _ESP_TLS_CRYPTO_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Calculate sha1 sum
+ * esp-tls abstraction for crypto sha1 API, calculates the sha1 sum(digest) of
+ * the data provided in input which is of ilen size and returns
+ * a 20 char sha1 sum
+ * @param[in]   input   Input array
+ * @param[in]   ilen    Length of Input array
+ * @param[out]  output  calculated sha1 sum
+ *
+ * @return
+ * mbedtls stack:-
+ *              - MBEDTLS_ERR_SHA1_BAD_INPUT_DATA   on BAD INPUT.
+ *              -  0 on success.
+ * wolfssl stack:-
+ *              - -1    on failure.
+ *              -  0    on success.
+ */
+int esp_crypto_sha1(const unsigned char *input,
+                    size_t ilen,
+                    unsigned char output[20]);
+
+/**
+ * @brief Do Base64 encode of the src data
+ *
+ * @param[in]   dst   destination buffer
+ * @param[in]   dlen  length of destination buffer
+ * @param[out]  olen  number of bytes written
+ * @param[in]   src   src buffer to be encoded
+ * @param[in]   slen  src buffer len
+ *
+ * @return
+ * mbedtls stack:-
+ *               - MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL  if buffer is of insufficient size.
+ *               -  0   if successful.
+ * wolfssl stack:-
+ *               - <0   on failure.
+ *               -  0   if succcessful.
+ */
+int esp_crypto_base64_encode(unsigned char *dst, size_t dlen,
+                             size_t *olen, const unsigned char *src,
+                             size_t slen);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _ESP_TLS_CRYPTO_H */