Autofix c casts to c++ casts

4 files changed, 126 insertions, 126 deletions

diff --git a/src/core/tsi/fake_transport_security.cc b/src/core/tsi/fake_transport_security.cc
index 7d5aaa7305..c7eb750a5b 100644
--- a/src/core/tsi/fake_transport_security.cc
+++ b/src/core/tsi/fake_transport_security.cc
@@ -102,7 +102,7 @@ static tsi_result tsi_fake_handshake_message_from_string(
   for (int i = 0; i < TSI_FAKE_HANDSHAKE_MESSAGE_MAX; i++) {
     if (strncmp(msg_string, tsi_fake_handshake_message_strings[i],
                 strlen(tsi_fake_handshake_message_strings[i])) == 0) {
-      *msg = (tsi_fake_handshake_message)i;
+      *msg = static_cast<tsi_fake_handshake_message>(i);
       return TSI_OK;
     }
   }
@@ -111,15 +111,15 @@ static tsi_result tsi_fake_handshake_message_from_string(
 }
 
 static uint32_t load32_little_endian(const unsigned char* buf) {
-  return ((uint32_t)(buf[0]) | (uint32_t)(buf[1] << 8) |
-          (uint32_t)(buf[2] << 16) | (uint32_t)(buf[3] << 24));
+  return (static_cast<uint32_t>(buf[0]) | static_cast<uint32_t>(buf[1] << 8) |
+          static_cast<uint32_t>(buf[2] << 16) | static_cast<uint32_t>(buf[3] << 24));
 }
 
 static void store32_little_endian(uint32_t value, unsigned char* buf) {
-  buf[3] = (unsigned char)((value >> 24) & 0xFF);
-  buf[2] = (unsigned char)((value >> 16) & 0xFF);
-  buf[1] = (unsigned char)((value >> 8) & 0xFF);
-  buf[0] = (unsigned char)((value)&0xFF);
+  buf[3] = static_cast<unsigned char>((value >> 24) & 0xFF);
+  buf[2] = static_cast<unsigned char>((value >> 16) & 0xFF);
+  buf[1] = static_cast<unsigned char>((value >> 8) & 0xFF);
+  buf[0] = static_cast<unsigned char>((value)&0xFF);
 }
 
 static uint32_t read_frame_size(const grpc_slice_buffer* sb) {
@@ -155,10 +155,10 @@ static void tsi_fake_frame_reset(tsi_fake_frame* frame, int needs_draining) {
 static void tsi_fake_frame_ensure_size(tsi_fake_frame* frame) {
   if (frame->data == nullptr) {
     frame->allocated_size = frame->size;
-    frame->data = (unsigned char*)gpr_malloc(frame->allocated_size);
+    frame->data = static_cast<unsigned char*>(gpr_malloc(frame->allocated_size));
   } else if (frame->size > frame->allocated_size) {
     unsigned char* new_data =
-        (unsigned char*)gpr_realloc(frame->data, frame->size);
+        static_cast<unsigned char*>(gpr_realloc(frame->data, frame->size));
     frame->data = new_data;
     frame->allocated_size = frame->size;
   }
@@ -177,7 +177,7 @@ static tsi_result tsi_fake_frame_decode(const unsigned char* incoming_bytes,
   if (frame->needs_draining) return TSI_INTERNAL_ERROR;
   if (frame->data == nullptr) {
     frame->allocated_size = TSI_FAKE_FRAME_INITIAL_ALLOCATED_SIZE;
-    frame->data = (unsigned char*)gpr_malloc(frame->allocated_size);
+    frame->data = static_cast<unsigned char*>(gpr_malloc(frame->allocated_size));
   }
 
   if (frame->offset < TSI_FAKE_FRAME_HEADER_SIZE) {
@@ -187,7 +187,7 @@ static tsi_result tsi_fake_frame_decode(const unsigned char* incoming_bytes,
       memcpy(frame->data + frame->offset, bytes_cursor, available_size);
       bytes_cursor += available_size;
       frame->offset += available_size;
-      *incoming_bytes_size = (size_t)(bytes_cursor - incoming_bytes);
+      *incoming_bytes_size = static_cast<size_t>(bytes_cursor - incoming_bytes);
       return TSI_INCOMPLETE_DATA;
     }
     memcpy(frame->data + frame->offset, bytes_cursor, to_read_size);
@@ -203,12 +203,12 @@ static tsi_result tsi_fake_frame_decode(const unsigned char* incoming_bytes,
     memcpy(frame->data + frame->offset, bytes_cursor, available_size);
     frame->offset += available_size;
     bytes_cursor += available_size;
-    *incoming_bytes_size = (size_t)(bytes_cursor - incoming_bytes);
+    *incoming_bytes_size = static_cast<size_t>(bytes_cursor - incoming_bytes);
     return TSI_INCOMPLETE_DATA;
   }
   memcpy(frame->data + frame->offset, bytes_cursor, to_read_size);
   bytes_cursor += to_read_size;
-  *incoming_bytes_size = (size_t)(bytes_cursor - incoming_bytes);
+  *incoming_bytes_size = static_cast<size_t>(bytes_cursor - incoming_bytes);
   tsi_fake_frame_reset(frame, 1 /* needs_draining */);
   return TSI_OK;
 }
@@ -239,7 +239,7 @@ static tsi_result tsi_fake_frame_set_data(unsigned char* data, size_t data_size,
   frame->offset = 0;
   frame->size = data_size + TSI_FAKE_FRAME_HEADER_SIZE;
   tsi_fake_frame_ensure_size(frame);
-  store32_little_endian((uint32_t)frame->size, frame->data);
+  store32_little_endian(static_cast<uint32_t>(frame->size), frame->data);
   memcpy(frame->data + TSI_FAKE_FRAME_HEADER_SIZE, data, data_size);
   tsi_fake_frame_reset(frame, 1 /* needs draining */);
   return TSI_OK;
@@ -258,7 +258,7 @@ static tsi_result fake_protector_protect(tsi_frame_protector* self,
                                          unsigned char* protected_output_frames,
                                          size_t* protected_output_frames_size) {
   tsi_result result = TSI_OK;
-  tsi_fake_frame_protector* impl = (tsi_fake_frame_protector*)self;
+  tsi_fake_frame_protector* impl = reinterpret_cast<tsi_fake_frame_protector*>(self);
   unsigned char frame_header[TSI_FAKE_FRAME_HEADER_SIZE];
   tsi_fake_frame* frame = &impl->protect_frame;
   size_t saved_output_size = *protected_output_frames_size;
@@ -287,7 +287,7 @@ static tsi_result fake_protector_protect(tsi_frame_protector* self,
   if (frame->size == 0) {
     /* New frame, create a header. */
     size_t written_in_frame_size = 0;
-    store32_little_endian((uint32_t)impl->max_frame_size, frame_header);
+    store32_little_endian(static_cast<uint32_t>(impl->max_frame_size), frame_header);
     written_in_frame_size = TSI_FAKE_FRAME_HEADER_SIZE;
     result = tsi_fake_frame_decode(frame_header, &written_in_frame_size, frame);
     if (result != TSI_INCOMPLETE_DATA) {
@@ -317,14 +317,14 @@ static tsi_result fake_protector_protect_flush(
     tsi_frame_protector* self, unsigned char* protected_output_frames,
     size_t* protected_output_frames_size, size_t* still_pending_size) {
   tsi_result result = TSI_OK;
-  tsi_fake_frame_protector* impl = (tsi_fake_frame_protector*)self;
+  tsi_fake_frame_protector* impl = reinterpret_cast<tsi_fake_frame_protector*>(self);
   tsi_fake_frame* frame = &impl->protect_frame;
   if (!frame->needs_draining) {
     /* Create a short frame. */
     frame->size = frame->offset;
     frame->offset = 0;
     frame->needs_draining = 1;
-    store32_little_endian((uint32_t)frame->size,
+    store32_little_endian(static_cast<uint32_t>(frame->size),
                           frame->data); /* Overwrite header. */
   }
   result = tsi_fake_frame_encode(protected_output_frames,
@@ -339,7 +339,7 @@ static tsi_result fake_protector_unprotect(
     size_t* protected_frames_bytes_size, unsigned char* unprotected_bytes,
     size_t* unprotected_bytes_size) {
   tsi_result result = TSI_OK;
-  tsi_fake_frame_protector* impl = (tsi_fake_frame_protector*)self;
+  tsi_fake_frame_protector* impl = reinterpret_cast<tsi_fake_frame_protector*>(self);
   tsi_fake_frame* frame = &impl->unprotect_frame;
   size_t saved_output_size = *unprotected_bytes_size;
   size_t drained_size = 0;
@@ -384,7 +384,7 @@ static tsi_result fake_protector_unprotect(
 }
 
 static void fake_protector_destroy(tsi_frame_protector* self) {
-  tsi_fake_frame_protector* impl = (tsi_fake_frame_protector*)self;
+  tsi_fake_frame_protector* impl = reinterpret_cast<tsi_fake_frame_protector*>(self);
   tsi_fake_frame_destruct(&impl->protect_frame);
   tsi_fake_frame_destruct(&impl->unprotect_frame);
   gpr_free(self);
@@ -407,14 +407,14 @@ static tsi_result fake_zero_copy_grpc_protector_protect(
     return TSI_INVALID_ARGUMENT;
   }
   tsi_fake_zero_copy_grpc_protector* impl =
-      (tsi_fake_zero_copy_grpc_protector*)self;
+      reinterpret_cast<tsi_fake_zero_copy_grpc_protector*>(self);
   /* Protects each frame. */
   while (unprotected_slices->length > 0) {
     size_t frame_length =
         GPR_MIN(impl->max_frame_size,
                 unprotected_slices->length + TSI_FAKE_FRAME_HEADER_SIZE);
     grpc_slice slice = GRPC_SLICE_MALLOC(TSI_FAKE_FRAME_HEADER_SIZE);
-    store32_little_endian((uint32_t)frame_length, GRPC_SLICE_START_PTR(slice));
+    store32_little_endian(static_cast<uint32_t>(frame_length), GRPC_SLICE_START_PTR(slice));
     grpc_slice_buffer_add(protected_slices, slice);
     size_t data_length = frame_length - TSI_FAKE_FRAME_HEADER_SIZE;
     grpc_slice_buffer_move_first(unprotected_slices, data_length,
@@ -431,7 +431,7 @@ static tsi_result fake_zero_copy_grpc_protector_unprotect(
     return TSI_INVALID_ARGUMENT;
   }
   tsi_fake_zero_copy_grpc_protector* impl =
-      (tsi_fake_zero_copy_grpc_protector*)self;
+      reinterpret_cast<tsi_fake_zero_copy_grpc_protector*>(self);
   grpc_slice_buffer_move_into(protected_slices, &impl->protected_sb);
   /* Unprotect each frame, if we get a full frame. */
   while (impl->protected_sb.length >= TSI_FAKE_FRAME_HEADER_SIZE) {
@@ -462,7 +462,7 @@ static void fake_zero_copy_grpc_protector_destroy(
     tsi_zero_copy_grpc_protector* self) {
   if (self == nullptr) return;
   tsi_fake_zero_copy_grpc_protector* impl =
-      (tsi_fake_zero_copy_grpc_protector*)self;
+      reinterpret_cast<tsi_fake_zero_copy_grpc_protector*>(self);
   grpc_slice_buffer_destroy_internal(&impl->header_sb);
   grpc_slice_buffer_destroy_internal(&impl->protected_sb);
   gpr_free(impl);
@@ -520,7 +520,7 @@ static tsi_result fake_handshaker_result_get_unused_bytes(
 }
 
 static void fake_handshaker_result_destroy(tsi_handshaker_result* self) {
-  fake_handshaker_result* result = (fake_handshaker_result*)self;
+  fake_handshaker_result* result = reinterpret_cast<fake_handshaker_result*>(self);
   gpr_free(result->unused_bytes);
   gpr_free(self);
 }
@@ -541,10 +541,10 @@ static tsi_result fake_handshaker_result_create(
     return TSI_INVALID_ARGUMENT;
   }
   fake_handshaker_result* result =
-      (fake_handshaker_result*)gpr_zalloc(sizeof(*result));
+      static_cast<fake_handshaker_result*>(gpr_zalloc(sizeof(*result)));
   result->base.vtable = &handshaker_result_vtable;
   if (unused_bytes_size > 0) {
-    result->unused_bytes = (unsigned char*)gpr_malloc(unused_bytes_size);
+    result->unused_bytes = static_cast<unsigned char*>(gpr_malloc(unused_bytes_size));
     memcpy(result->unused_bytes, unused_bytes, unused_bytes_size);
   }
   result->unused_bytes_size = unused_bytes_size;
@@ -556,7 +556,7 @@ static tsi_result fake_handshaker_result_create(
 
 static tsi_result fake_handshaker_get_bytes_to_send_to_peer(
     tsi_handshaker* self, unsigned char* bytes, size_t* bytes_size) {
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* impl = reinterpret_cast<tsi_fake_handshaker*>(self);
   tsi_result result = TSI_OK;
   if (impl->needs_incoming_message || impl->result == TSI_OK) {
     *bytes_size = 0;
@@ -564,7 +564,7 @@ static tsi_result fake_handshaker_get_bytes_to_send_to_peer(
   }
   if (!impl->outgoing_frame.needs_draining) {
     tsi_fake_handshake_message next_message_to_send =
-        (tsi_fake_handshake_message)(impl->next_message_to_send + 2);
+        static_cast<tsi_fake_handshake_message>(impl->next_message_to_send + 2);
     const char* msg_string =
         tsi_fake_handshake_message_to_string(impl->next_message_to_send);
     result = tsi_fake_frame_set_data((unsigned char*)msg_string,
@@ -598,9 +598,9 @@ static tsi_result fake_handshaker_get_bytes_to_send_to_peer(
 static tsi_result fake_handshaker_process_bytes_from_peer(
     tsi_handshaker* self, const unsigned char* bytes, size_t* bytes_size) {
   tsi_result result = TSI_OK;
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* impl = reinterpret_cast<tsi_fake_handshaker*>(self);
   tsi_fake_handshake_message expected_msg =
-      (tsi_fake_handshake_message)(impl->next_message_to_send - 1);
+      static_cast<tsi_fake_handshake_message>(impl->next_message_to_send - 1);
   tsi_fake_handshake_message received_msg;
 
   if (!impl->needs_incoming_message || impl->result == TSI_OK) {
@@ -612,7 +612,7 @@ static tsi_result fake_handshaker_process_bytes_from_peer(
 
   /* We now have a complete frame. */
   result = tsi_fake_handshake_message_from_string(
-      (const char*)impl->incoming_frame.data + TSI_FAKE_FRAME_HEADER_SIZE,
+      reinterpret_cast<const char*>(impl->incoming_frame.data) + TSI_FAKE_FRAME_HEADER_SIZE,
       &received_msg);
   if (result != TSI_OK) {
     impl->result = result;
@@ -640,12 +640,12 @@ static tsi_result fake_handshaker_process_bytes_from_peer(
 }
 
 static tsi_result fake_handshaker_get_result(tsi_handshaker* self) {
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* impl = reinterpret_cast<tsi_fake_handshaker*>(self);
   return impl->result;
 }
 
 static void fake_handshaker_destroy(tsi_handshaker* self) {
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* impl = reinterpret_cast<tsi_fake_handshaker*>(self);
   tsi_fake_frame_destruct(&impl->incoming_frame);
   tsi_fake_frame_destruct(&impl->outgoing_frame);
   gpr_free(impl->outgoing_bytes_buffer);
@@ -663,7 +663,7 @@ static tsi_result fake_handshaker_next(
       handshaker_result == nullptr) {
     return TSI_INVALID_ARGUMENT;
   }
-  tsi_fake_handshaker* handshaker = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* handshaker = reinterpret_cast<tsi_fake_handshaker*>(self);
   tsi_result result = TSI_OK;
 
   /* Decode and process a handshake frame from the peer. */
@@ -685,8 +685,8 @@ static tsi_result fake_handshaker_next(
     if (result == TSI_INCOMPLETE_DATA) {
       handshaker->outgoing_bytes_buffer_size *= 2;
       handshaker->outgoing_bytes_buffer =
-          (unsigned char*)gpr_realloc(handshaker->outgoing_bytes_buffer,
-                                      handshaker->outgoing_bytes_buffer_size);
+          static_cast<unsigned char*>(gpr_realloc(handshaker->outgoing_bytes_buffer,
+                                      handshaker->outgoing_bytes_buffer_size));
     }
   } while (result == TSI_INCOMPLETE_DATA);
   if (result != TSI_OK) return result;
@@ -727,14 +727,14 @@ static const tsi_handshaker_vtable handshaker_vtable = {
 };
 
 tsi_handshaker* tsi_create_fake_handshaker(int is_client) {
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)gpr_zalloc(sizeof(*impl));
+  tsi_fake_handshaker* impl = static_cast<tsi_fake_handshaker*>(gpr_zalloc(sizeof(*impl)));
   impl->base.vtable = &handshaker_vtable;
   impl->is_client = is_client;
   impl->result = TSI_HANDSHAKE_IN_PROGRESS;
   impl->outgoing_bytes_buffer_size =
       TSI_FAKE_HANDSHAKER_OUTGOING_BUFFER_INITIAL_SIZE;
   impl->outgoing_bytes_buffer =
-      (unsigned char*)gpr_malloc(impl->outgoing_bytes_buffer_size);
+      static_cast<unsigned char*>(gpr_malloc(impl->outgoing_bytes_buffer_size));
   if (is_client) {
     impl->needs_incoming_message = 0;
     impl->next_message_to_send = TSI_FAKE_CLIENT_INIT;
@@ -748,7 +748,7 @@ tsi_handshaker* tsi_create_fake_handshaker(int is_client) {
 tsi_frame_protector* tsi_create_fake_frame_protector(
     size_t* max_protected_frame_size) {
   tsi_fake_frame_protector* impl =
-      (tsi_fake_frame_protector*)gpr_zalloc(sizeof(*impl));
+      static_cast<tsi_fake_frame_protector*>(gpr_zalloc(sizeof(*impl)));
   impl->max_frame_size = (max_protected_frame_size == nullptr)
                              ? TSI_FAKE_DEFAULT_FRAME_SIZE
                              : *max_protected_frame_size;
@@ -759,7 +759,7 @@ tsi_frame_protector* tsi_create_fake_frame_protector(
 tsi_zero_copy_grpc_protector* tsi_create_fake_zero_copy_grpc_protector(
     size_t* max_protected_frame_size) {
   tsi_fake_zero_copy_grpc_protector* impl =
-      (tsi_fake_zero_copy_grpc_protector*)gpr_zalloc(sizeof(*impl));
+      static_cast<tsi_fake_zero_copy_grpc_protector*>(gpr_zalloc(sizeof(*impl)));
   grpc_slice_buffer_init(&impl->header_sb);
   grpc_slice_buffer_init(&impl->protected_sb);
   impl->max_frame_size = (max_protected_frame_size == nullptr)
diff --git a/src/core/tsi/ssl_transport_security.cc b/src/core/tsi/ssl_transport_security.cc
index 6de02d4952..b32649a8b9 100644
--- a/src/core/tsi/ssl_transport_security.cc
+++ b/src/core/tsi/ssl_transport_security.cc
@@ -126,7 +126,7 @@ static void openssl_locking_cb(int mode, int type, const char* file, int line) {
 }
 
 static unsigned long openssl_thread_id_cb(void) {
-  return (unsigned long)gpr_thd_currentid();
+  return static_cast<unsigned long>(gpr_thd_currentid());
 }
 
 static void init_openssl(void) {
@@ -137,7 +137,7 @@ static void init_openssl(void) {
   OpenSSL_add_all_algorithms();
   num_locks = CRYPTO_num_locks();
   GPR_ASSERT(num_locks > 0);
-  openssl_mutexes = (gpr_mu*)gpr_malloc((size_t)num_locks * sizeof(gpr_mu));
+  openssl_mutexes = static_cast<gpr_mu*>(gpr_malloc(static_cast<size_t>(num_locks) * sizeof(gpr_mu)));
   for (i = 0; i < CRYPTO_num_locks(); i++) {
     gpr_mu_init(&openssl_mutexes[i]);
   }
@@ -254,7 +254,7 @@ static tsi_result ssl_get_x509_common_name(X509* cert, unsigned char** utf8,
     gpr_log(GPR_ERROR, "Could not extract utf8 from asn1 string.");
     return TSI_OUT_OF_RESOURCES;
   }
-  *utf8_size = (size_t)utf8_returned_size;
+  *utf8_size = static_cast<size_t>(utf8_returned_size);
   return TSI_OK;
 }
 
@@ -275,7 +275,7 @@ static tsi_result peer_property_from_x509_common_name(
   }
   result = tsi_construct_string_peer_property(
       TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY,
-      common_name == nullptr ? "" : (const char*)common_name, common_name_size,
+      common_name == nullptr ? "" : reinterpret_cast<const char*>(common_name), common_name_size,
       property);
   OPENSSL_free(common_name);
   return result;
@@ -295,7 +295,7 @@ static tsi_result add_pem_certificate(X509* cert, tsi_peer_property* property) {
     return TSI_INTERNAL_ERROR;
   }
   tsi_result result = tsi_construct_string_peer_property(
-      TSI_X509_PEM_CERT_PROPERTY, (const char*)contents, (size_t)len, property);
+      TSI_X509_PEM_CERT_PROPERTY, (const char*)contents, static_cast<size_t>(len), property);
   BIO_free(bio);
   return result;
 }
@@ -324,8 +324,8 @@ static tsi_result add_subject_alt_names_properties_to_peer(
         break;
       }
       result = tsi_construct_string_peer_property(
-          TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, (const char*)name,
-          (size_t)name_size, &peer->properties[peer->property_count++]);
+          TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, reinterpret_cast<const char*>(name),
+          static_cast<size_t>(name_size), &peer->properties[peer->property_count++]);
       OPENSSL_free(name);
     } else if (subject_alt_name->type == GEN_IPADD) {
       char ntop_buf[INET6_ADDRSTRLEN];
@@ -361,17 +361,17 @@ static tsi_result add_subject_alt_names_properties_to_peer(
 static tsi_result peer_from_x509(X509* cert, int include_certificate_type,
                                  tsi_peer* peer) {
   /* TODO(jboeuf): Maybe add more properties. */
-  GENERAL_NAMES* subject_alt_names = (GENERAL_NAMES*)X509_get_ext_d2i(
-      cert, NID_subject_alt_name, nullptr, nullptr);
+  GENERAL_NAMES* subject_alt_names = static_cast<GENERAL_NAMES*>(X509_get_ext_d2i(
+      cert, NID_subject_alt_name, nullptr, nullptr));
   int subject_alt_name_count = (subject_alt_names != nullptr)
-                                   ? (int)sk_GENERAL_NAME_num(subject_alt_names)
+                                   ? static_cast<int>(sk_GENERAL_NAME_num(subject_alt_names))
                                    : 0;
   size_t property_count;
   tsi_result result;
   GPR_ASSERT(subject_alt_name_count >= 0);
-  property_count = (include_certificate_type ? (size_t)1 : 0) +
+  property_count = (include_certificate_type ? static_cast<size_t>(1) : 0) +
                    2 /* common name, certificate */ +
-                   (size_t)subject_alt_name_count;
+                   static_cast<size_t>(subject_alt_name_count);
   result = tsi_construct_peer(property_count, peer);
   if (result != TSI_OK) return result;
   do {
@@ -391,7 +391,7 @@ static tsi_result peer_from_x509(X509* cert, int include_certificate_type,
 
     if (subject_alt_name_count != 0) {
       result = add_subject_alt_names_properties_to_peer(
-          peer, subject_alt_names, (size_t)subject_alt_name_count);
+          peer, subject_alt_names, static_cast<size_t>(subject_alt_name_count));
       if (result != TSI_OK) break;
     }
   } while (0);
@@ -408,7 +408,7 @@ static void log_ssl_error_stack(void) {
   unsigned long err;
   while ((err = ERR_get_error()) != 0) {
     char details[256];
-    ERR_error_string_n((uint32_t)err, details, sizeof(details));
+    ERR_error_string_n(static_cast<uint32_t>(err), details, sizeof(details));
     gpr_log(GPR_ERROR, "%s", details);
   }
 }
@@ -419,7 +419,7 @@ static tsi_result do_ssl_read(SSL* ssl, unsigned char* unprotected_bytes,
   int read_from_ssl;
   GPR_ASSERT(*unprotected_bytes_size <= INT_MAX);
   read_from_ssl =
-      SSL_read(ssl, unprotected_bytes, (int)*unprotected_bytes_size);
+      SSL_read(ssl, unprotected_bytes, static_cast<int>(*unprotected_bytes_size));
   if (read_from_ssl <= 0) {
     read_from_ssl = SSL_get_error(ssl, read_from_ssl);
     switch (read_from_ssl) {
@@ -442,7 +442,7 @@ static tsi_result do_ssl_read(SSL* ssl, unsigned char* unprotected_bytes,
         return TSI_PROTOCOL_FAILURE;
     }
   }
-  *unprotected_bytes_size = (size_t)read_from_ssl;
+  *unprotected_bytes_size = static_cast<size_t>(read_from_ssl);
   return TSI_OK;
 }
 
@@ -452,7 +452,7 @@ static tsi_result do_ssl_write(SSL* ssl, unsigned char* unprotected_bytes,
   int ssl_write_result;
   GPR_ASSERT(unprotected_bytes_size <= INT_MAX);
   ssl_write_result =
-      SSL_write(ssl, unprotected_bytes, (int)unprotected_bytes_size);
+      SSL_write(ssl, unprotected_bytes, static_cast<int>(unprotected_bytes_size));
   if (ssl_write_result < 0) {
     ssl_write_result = SSL_get_error(ssl, ssl_write_result);
     if (ssl_write_result == SSL_ERROR_WANT_READ) {
@@ -476,7 +476,7 @@ static tsi_result ssl_ctx_use_certificate_chain(SSL_CTX* context,
   X509* certificate = nullptr;
   BIO* pem;
   GPR_ASSERT(pem_cert_chain_size <= INT_MAX);
-  pem = BIO_new_mem_buf((void*)pem_cert_chain, (int)pem_cert_chain_size);
+  pem = BIO_new_mem_buf((void*)pem_cert_chain, static_cast<int>(pem_cert_chain_size));
   if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
 
   do {
@@ -519,7 +519,7 @@ static tsi_result ssl_ctx_use_private_key(SSL_CTX* context, const char* pem_key,
   EVP_PKEY* private_key = nullptr;
   BIO* pem;
   GPR_ASSERT(pem_key_size <= INT_MAX);
-  pem = BIO_new_mem_buf((void*)pem_key, (int)pem_key_size);
+  pem = BIO_new_mem_buf((void*)pem_key, static_cast<int>(pem_key_size));
   if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
   do {
     private_key = PEM_read_bio_PrivateKey(pem, nullptr, nullptr, (void*)"");
@@ -551,7 +551,7 @@ static tsi_result ssl_ctx_load_verification_certs(SSL_CTX* context,
   BIO* pem;
   X509_STORE* root_store;
   GPR_ASSERT(pem_roots_size <= INT_MAX);
-  pem = BIO_new_mem_buf((void*)pem_roots, (int)pem_roots_size);
+  pem = BIO_new_mem_buf((void*)pem_roots, static_cast<int>(pem_roots_size));
   root_store = SSL_CTX_get_cert_store(context);
   if (root_store == nullptr) return TSI_INVALID_ARGUMENT;
   if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
@@ -655,7 +655,7 @@ static tsi_result extract_x509_subject_names_from_pem_cert(const char* pem_cert,
   tsi_result result = TSI_OK;
   X509* cert = nullptr;
   BIO* pem;
-  pem = BIO_new_mem_buf((void*)pem_cert, (int)strlen(pem_cert));
+  pem = BIO_new_mem_buf((void*)pem_cert, static_cast<int>(strlen(pem_cert)));
   if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
 
   cert = PEM_read_bio_X509(pem, nullptr, nullptr, (void*)"");
@@ -683,23 +683,23 @@ static tsi_result build_alpn_protocol_name_list(
     size_t length =
         alpn_protocols[i] == nullptr ? 0 : strlen(alpn_protocols[i]);
     if (length == 0 || length > 255) {
-      gpr_log(GPR_ERROR, "Invalid protocol name length: %d.", (int)length);
+      gpr_log(GPR_ERROR, "Invalid protocol name length: %d.", static_cast<int>(length));
       return TSI_INVALID_ARGUMENT;
     }
     *protocol_name_list_length += length + 1;
   }
-  *protocol_name_list = (unsigned char*)gpr_malloc(*protocol_name_list_length);
+  *protocol_name_list = static_cast<unsigned char*>(gpr_malloc(*protocol_name_list_length));
   if (*protocol_name_list == nullptr) return TSI_OUT_OF_RESOURCES;
   current = *protocol_name_list;
   for (i = 0; i < num_alpn_protocols; i++) {
     size_t length = strlen(alpn_protocols[i]);
-    *(current++) = (uint8_t)length; /* max checked above. */
+    *(current++) = static_cast<uint8_t>(length); /* max checked above. */
     memcpy(current, alpn_protocols[i], length);
     current += length;
   }
   /* Safety check. */
   if ((current < *protocol_name_list) ||
-      ((uintptr_t)(current - *protocol_name_list) !=
+      (static_cast<uintptr_t>(current - *protocol_name_list) !=
        *protocol_name_list_length)) {
     return TSI_INTERNAL_ERROR;
   }
@@ -721,24 +721,24 @@ static tsi_result ssl_protector_protect(tsi_frame_protector* self,
                                         size_t* unprotected_bytes_size,
                                         unsigned char* protected_output_frames,
                                         size_t* protected_output_frames_size) {
-  tsi_ssl_frame_protector* impl = (tsi_ssl_frame_protector*)self;
+  tsi_ssl_frame_protector* impl = reinterpret_cast<tsi_ssl_frame_protector*>(self);
   int read_from_ssl;
   size_t available;
   tsi_result result = TSI_OK;
 
   /* First see if we have some pending data in the SSL BIO. */
-  int pending_in_ssl = (int)BIO_pending(impl->network_io);
+  int pending_in_ssl = static_cast<int>(BIO_pending(impl->network_io));
   if (pending_in_ssl > 0) {
     *unprotected_bytes_size = 0;
     GPR_ASSERT(*protected_output_frames_size <= INT_MAX);
     read_from_ssl = BIO_read(impl->network_io, protected_output_frames,
-                             (int)*protected_output_frames_size);
+                             static_cast<int>(*protected_output_frames_size));
     if (read_from_ssl < 0) {
       gpr_log(GPR_ERROR,
               "Could not read from BIO even though some data is pending");
       return TSI_INTERNAL_ERROR;
     }
-    *protected_output_frames_size = (size_t)read_from_ssl;
+    *protected_output_frames_size = static_cast<size_t>(read_from_ssl);
     return TSI_OK;
   }
 
@@ -760,12 +760,12 @@ static tsi_result ssl_protector_protect(tsi_frame_protector* self,
 
   GPR_ASSERT(*protected_output_frames_size <= INT_MAX);
   read_from_ssl = BIO_read(impl->network_io, protected_output_frames,
-                           (int)*protected_output_frames_size);
+                           static_cast<int>(*protected_output_frames_size));
   if (read_from_ssl < 0) {
     gpr_log(GPR_ERROR, "Could not read from BIO after SSL_write.");
     return TSI_INTERNAL_ERROR;
   }
-  *protected_output_frames_size = (size_t)read_from_ssl;
+  *protected_output_frames_size = static_cast<size_t>(read_from_ssl);
   *unprotected_bytes_size = available;
   impl->buffer_offset = 0;
   return TSI_OK;
@@ -775,7 +775,7 @@ static tsi_result ssl_protector_protect_flush(
     tsi_frame_protector* self, unsigned char* protected_output_frames,
     size_t* protected_output_frames_size, size_t* still_pending_size) {
   tsi_result result = TSI_OK;
-  tsi_ssl_frame_protector* impl = (tsi_ssl_frame_protector*)self;
+  tsi_ssl_frame_protector* impl = reinterpret_cast<tsi_ssl_frame_protector*>(self);
   int read_from_ssl = 0;
   int pending;
 
@@ -785,22 +785,22 @@ static tsi_result ssl_protector_protect_flush(
     impl->buffer_offset = 0;
   }
 
-  pending = (int)BIO_pending(impl->network_io);
+  pending = static_cast<int>(BIO_pending(impl->network_io));
   GPR_ASSERT(pending >= 0);
-  *still_pending_size = (size_t)pending;
+  *still_pending_size = static_cast<size_t>(pending);
   if (*still_pending_size == 0) return TSI_OK;
 
   GPR_ASSERT(*protected_output_frames_size <= INT_MAX);
   read_from_ssl = BIO_read(impl->network_io, protected_output_frames,
-                           (int)*protected_output_frames_size);
+                           static_cast<int>(*protected_output_frames_size));
   if (read_from_ssl <= 0) {
     gpr_log(GPR_ERROR, "Could not read from BIO after SSL_write.");
     return TSI_INTERNAL_ERROR;
   }
-  *protected_output_frames_size = (size_t)read_from_ssl;
-  pending = (int)BIO_pending(impl->network_io);
+  *protected_output_frames_size = static_cast<size_t>(read_from_ssl);
+  pending = static_cast<int>(BIO_pending(impl->network_io));
   GPR_ASSERT(pending >= 0);
-  *still_pending_size = (size_t)pending;
+  *still_pending_size = static_cast<size_t>(pending);
   return TSI_OK;
 }
 
@@ -812,7 +812,7 @@ static tsi_result ssl_protector_unprotect(
   int written_into_ssl = 0;
   size_t output_bytes_size = *unprotected_bytes_size;
   size_t output_bytes_offset = 0;
-  tsi_ssl_frame_protector* impl = (tsi_ssl_frame_protector*)self;
+  tsi_ssl_frame_protector* impl = reinterpret_cast<tsi_ssl_frame_protector*>(self);
 
   /* First, try to read remaining data from ssl. */
   result = do_ssl_read(impl->ssl, unprotected_bytes, unprotected_bytes_size);
@@ -829,13 +829,13 @@ static tsi_result ssl_protector_unprotect(
   /* Then, try to write some data to ssl. */
   GPR_ASSERT(*protected_frames_bytes_size <= INT_MAX);
   written_into_ssl = BIO_write(impl->network_io, protected_frames_bytes,
-                               (int)*protected_frames_bytes_size);
+                               static_cast<int>(*protected_frames_bytes_size));
   if (written_into_ssl < 0) {
     gpr_log(GPR_ERROR, "Sending protected frame to ssl failed with %d",
             written_into_ssl);
     return TSI_INTERNAL_ERROR;
   }
-  *protected_frames_bytes_size = (size_t)written_into_ssl;
+  *protected_frames_bytes_size = static_cast<size_t>(written_into_ssl);
 
   /* Now try to read some data again. */
   result = do_ssl_read(impl->ssl, unprotected_bytes, unprotected_bytes_size);
@@ -847,7 +847,7 @@ static tsi_result ssl_protector_unprotect(
 }
 
 static void ssl_protector_destroy(tsi_frame_protector* self) {
-  tsi_ssl_frame_protector* impl = (tsi_ssl_frame_protector*)self;
+  tsi_ssl_frame_protector* impl = reinterpret_cast<tsi_ssl_frame_protector*>(self);
   if (impl->buffer != nullptr) gpr_free(impl->buffer);
   if (impl->ssl != nullptr) SSL_free(impl->ssl);
   if (impl->network_io != nullptr) BIO_free(impl->network_io);
@@ -907,14 +907,14 @@ static void tsi_ssl_handshaker_factory_init(
 static tsi_result ssl_handshaker_get_bytes_to_send_to_peer(tsi_handshaker* self,
                                                            unsigned char* bytes,
                                                            size_t* bytes_size) {
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   int bytes_read_from_ssl = 0;
   if (bytes == nullptr || bytes_size == nullptr || *bytes_size == 0 ||
       *bytes_size > INT_MAX) {
     return TSI_INVALID_ARGUMENT;
   }
   GPR_ASSERT(*bytes_size <= INT_MAX);
-  bytes_read_from_ssl = BIO_read(impl->network_io, bytes, (int)*bytes_size);
+  bytes_read_from_ssl = BIO_read(impl->network_io, bytes, static_cast<int>(*bytes_size));
   if (bytes_read_from_ssl < 0) {
     *bytes_size = 0;
     if (!BIO_should_retry(impl->network_io)) {
@@ -924,12 +924,12 @@ static tsi_result ssl_handshaker_get_bytes_to_send_to_peer(tsi_handshaker* self,
       return TSI_OK;
     }
   }
-  *bytes_size = (size_t)bytes_read_from_ssl;
+  *bytes_size = static_cast<size_t>(bytes_read_from_ssl);
   return BIO_pending(impl->network_io) == 0 ? TSI_OK : TSI_INCOMPLETE_DATA;
 }
 
 static tsi_result ssl_handshaker_get_result(tsi_handshaker* self) {
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   if ((impl->result == TSI_HANDSHAKE_IN_PROGRESS) &&
       SSL_is_init_finished(impl->ssl)) {
     impl->result = TSI_OK;
@@ -939,20 +939,20 @@ static tsi_result ssl_handshaker_get_result(tsi_handshaker* self) {
 
 static tsi_result ssl_handshaker_process_bytes_from_peer(
     tsi_handshaker* self, const unsigned char* bytes, size_t* bytes_size) {
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   int bytes_written_into_ssl_size = 0;
   if (bytes == nullptr || bytes_size == nullptr || *bytes_size > INT_MAX) {
     return TSI_INVALID_ARGUMENT;
   }
   GPR_ASSERT(*bytes_size <= INT_MAX);
   bytes_written_into_ssl_size =
-      BIO_write(impl->network_io, bytes, (int)*bytes_size);
+      BIO_write(impl->network_io, bytes, static_cast<int>(*bytes_size));
   if (bytes_written_into_ssl_size < 0) {
     gpr_log(GPR_ERROR, "Could not write to memory BIO.");
     impl->result = TSI_INTERNAL_ERROR;
     return impl->result;
   }
-  *bytes_size = (size_t)bytes_written_into_ssl_size;
+  *bytes_size = static_cast<size_t>(bytes_written_into_ssl_size);
 
   if (!tsi_handshaker_is_in_progress(self)) {
     impl->result = TSI_OK;
@@ -988,7 +988,7 @@ static tsi_result ssl_handshaker_extract_peer(tsi_handshaker* self,
   tsi_result result = TSI_OK;
   const unsigned char* alpn_selected = nullptr;
   unsigned int alpn_selected_len;
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   X509* peer_cert = SSL_get_peer_certificate(impl->ssl);
   if (peer_cert != nullptr) {
     result = peer_from_x509(peer_cert, 1, peer);
@@ -1005,13 +1005,13 @@ static tsi_result ssl_handshaker_extract_peer(tsi_handshaker* self,
   }
   if (alpn_selected != nullptr) {
     size_t i;
-    tsi_peer_property* new_properties = (tsi_peer_property*)gpr_zalloc(
-        sizeof(*new_properties) * (peer->property_count + 1));
+    tsi_peer_property* new_properties = static_cast<tsi_peer_property*>(gpr_zalloc(
+        sizeof(*new_properties) * (peer->property_count + 1)));
     for (i = 0; i < peer->property_count; i++) {
       new_properties[i] = peer->properties[i];
     }
     result = tsi_construct_string_peer_property(
-        TSI_SSL_ALPN_SELECTED_PROTOCOL, (const char*)alpn_selected,
+        TSI_SSL_ALPN_SELECTED_PROTOCOL, reinterpret_cast<const char*>(alpn_selected),
         alpn_selected_len, &new_properties[peer->property_count]);
     if (result != TSI_OK) {
       gpr_free(new_properties);
@@ -1029,9 +1029,9 @@ static tsi_result ssl_handshaker_create_frame_protector(
     tsi_frame_protector** protector) {
   size_t actual_max_output_protected_frame_size =
       TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND;
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   tsi_ssl_frame_protector* protector_impl =
-      (tsi_ssl_frame_protector*)gpr_zalloc(sizeof(*protector_impl));
+      static_cast<tsi_ssl_frame_protector*>(gpr_zalloc(sizeof(*protector_impl)));
 
   if (max_output_protected_frame_size != nullptr) {
     if (*max_output_protected_frame_size >
@@ -1048,7 +1048,7 @@ static tsi_result ssl_handshaker_create_frame_protector(
   protector_impl->buffer_size =
       actual_max_output_protected_frame_size - TSI_SSL_MAX_PROTECTION_OVERHEAD;
   protector_impl->buffer =
-      (unsigned char*)gpr_malloc(protector_impl->buffer_size);
+      static_cast<unsigned char*>(gpr_malloc(protector_impl->buffer_size));
   if (protector_impl->buffer == nullptr) {
     gpr_log(GPR_ERROR,
             "Could not allocated buffer for tsi_ssl_frame_protector.");
@@ -1070,7 +1070,7 @@ static tsi_result ssl_handshaker_create_frame_protector(
 }
 
 static void ssl_handshaker_destroy(tsi_handshaker* self) {
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   SSL_free(impl->ssl);
   BIO_free(impl->network_io);
   tsi_ssl_handshaker_factory_unref(impl->factory_ref);
@@ -1139,7 +1139,7 @@ static tsi_result create_tsi_ssl_handshaker(SSL_CTX* ctx, int is_client,
     SSL_set_accept_state(ssl);
   }
 
-  impl = (tsi_ssl_handshaker*)gpr_zalloc(sizeof(*impl));
+  impl = static_cast<tsi_ssl_handshaker*>(gpr_zalloc(sizeof(*impl)));
   impl->ssl = ssl;
   impl->network_io = network_io;
   impl->result = TSI_HANDSHAKE_IN_PROGRESS;
@@ -1157,11 +1157,11 @@ static int select_protocol_list(const unsigned char** out,
                                 const unsigned char* server_list,
                                 size_t server_list_len) {
   const unsigned char* client_current = client_list;
-  while ((unsigned int)(client_current - client_list) < client_list_len) {
+  while (static_cast<unsigned int>(client_current - client_list) < client_list_len) {
     unsigned char client_current_len = *(client_current++);
     const unsigned char* server_current = server_list;
     while ((server_current >= server_list) &&
-           (uintptr_t)(server_current - server_list) < server_list_len) {
+           static_cast<uintptr_t>(server_current - server_list) < server_list_len) {
       unsigned char server_current_len = *(server_current++);
       if ((client_current_len == server_current_len) &&
           !memcmp(client_current, server_current, server_current_len)) {
@@ -1195,7 +1195,7 @@ static void tsi_ssl_client_handshaker_factory_destroy(
     tsi_ssl_handshaker_factory* factory) {
   if (factory == nullptr) return;
   tsi_ssl_client_handshaker_factory* self =
-      (tsi_ssl_client_handshaker_factory*)factory;
+      reinterpret_cast<tsi_ssl_client_handshaker_factory*>(factory);
   if (self->ssl_context != nullptr) SSL_CTX_free(self->ssl_context);
   if (self->alpn_protocol_list != nullptr) gpr_free(self->alpn_protocol_list);
   gpr_free(self);
@@ -1207,7 +1207,7 @@ static int client_handshaker_factory_npn_callback(SSL* ssl, unsigned char** out,
                                                   unsigned int inlen,
                                                   void* arg) {
   tsi_ssl_client_handshaker_factory* factory =
-      (tsi_ssl_client_handshaker_factory*)arg;
+      static_cast<tsi_ssl_client_handshaker_factory*>(arg);
   return select_protocol_list((const unsigned char**)out, outlen,
                               factory->alpn_protocol_list,
                               factory->alpn_protocol_list_length, in, inlen);
@@ -1234,7 +1234,7 @@ static void tsi_ssl_server_handshaker_factory_destroy(
     tsi_ssl_handshaker_factory* factory) {
   if (factory == nullptr) return;
   tsi_ssl_server_handshaker_factory* self =
-      (tsi_ssl_server_handshaker_factory*)factory;
+      reinterpret_cast<tsi_ssl_server_handshaker_factory*>(factory);
   size_t i;
   for (i = 0; i < self->ssl_context_count; i++) {
     if (self->ssl_contexts[i] != nullptr) {
@@ -1301,7 +1301,7 @@ static int does_entry_match_name(const char* entry, size_t entry_length,
 static int ssl_server_handshaker_factory_servername_callback(SSL* ssl, int* ap,
                                                              void* arg) {
   tsi_ssl_server_handshaker_factory* impl =
-      (tsi_ssl_server_handshaker_factory*)arg;
+      static_cast<tsi_ssl_server_handshaker_factory*>(arg);
   size_t i = 0;
   const char* servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
   if (servername == nullptr || strlen(servername) == 0) {
@@ -1324,7 +1324,7 @@ static int server_handshaker_factory_alpn_callback(
     SSL* ssl, const unsigned char** out, unsigned char* outlen,
     const unsigned char* in, unsigned int inlen, void* arg) {
   tsi_ssl_server_handshaker_factory* factory =
-      (tsi_ssl_server_handshaker_factory*)arg;
+      static_cast<tsi_ssl_server_handshaker_factory*>(arg);
   return select_protocol_list(out, outlen, in, inlen,
                               factory->alpn_protocol_list,
                               factory->alpn_protocol_list_length);
@@ -1334,10 +1334,10 @@ static int server_handshaker_factory_alpn_callback(
 static int server_handshaker_factory_npn_advertised_callback(
     SSL* ssl, const unsigned char** out, unsigned int* outlen, void* arg) {
   tsi_ssl_server_handshaker_factory* factory =
-      (tsi_ssl_server_handshaker_factory*)arg;
+      static_cast<tsi_ssl_server_handshaker_factory*>(arg);
   *out = factory->alpn_protocol_list;
   GPR_ASSERT(factory->alpn_protocol_list_length <= UINT_MAX);
-  *outlen = (unsigned int)factory->alpn_protocol_list_length;
+  *outlen = static_cast<unsigned int>(factory->alpn_protocol_list_length);
   return SSL_TLSEXT_ERR_OK;
 }
 
@@ -1367,7 +1367,7 @@ tsi_result tsi_create_ssl_client_handshaker_factory(
     return TSI_INVALID_ARGUMENT;
   }
 
-  impl = (tsi_ssl_client_handshaker_factory*)gpr_zalloc(sizeof(*impl));
+  impl = static_cast<tsi_ssl_client_handshaker_factory*>(gpr_zalloc(sizeof(*impl)));
   tsi_ssl_handshaker_factory_init(&impl->base);
   impl->base.vtable = &client_handshaker_factory_vtable;
 
@@ -1397,7 +1397,7 @@ tsi_result tsi_create_ssl_client_handshaker_factory(
       GPR_ASSERT(impl->alpn_protocol_list_length < UINT_MAX);
       if (SSL_CTX_set_alpn_protos(
               ssl_context, impl->alpn_protocol_list,
-              (unsigned int)impl->alpn_protocol_list_length)) {
+              static_cast<unsigned int>(impl->alpn_protocol_list_length))) {
         gpr_log(GPR_ERROR, "Could not set alpn protocol list to context.");
         result = TSI_INVALID_ARGUMENT;
         break;
@@ -1452,14 +1452,14 @@ tsi_result tsi_create_ssl_server_handshaker_factory_ex(
     return TSI_INVALID_ARGUMENT;
   }
 
-  impl = (tsi_ssl_server_handshaker_factory*)gpr_zalloc(sizeof(*impl));
+  impl = static_cast<tsi_ssl_server_handshaker_factory*>(gpr_zalloc(sizeof(*impl)));
   tsi_ssl_handshaker_factory_init(&impl->base);
   impl->base.vtable = &server_handshaker_factory_vtable;
 
   impl->ssl_contexts =
-      (SSL_CTX**)gpr_zalloc(num_key_cert_pairs * sizeof(SSL_CTX*));
+      static_cast<SSL_CTX**>(gpr_zalloc(num_key_cert_pairs * sizeof(SSL_CTX*)));
   impl->ssl_context_x509_subject_names =
-      (tsi_peer*)gpr_zalloc(num_key_cert_pairs * sizeof(tsi_peer));
+      static_cast<tsi_peer*>(gpr_zalloc(num_key_cert_pairs * sizeof(tsi_peer)));
   if (impl->ssl_contexts == nullptr ||
       impl->ssl_context_x509_subject_names == nullptr) {
     tsi_ssl_handshaker_factory_unref(&impl->base);
diff --git a/src/core/tsi/transport_security.cc b/src/core/tsi/transport_security.cc
index 5abd2f0f68..5cfdf6fc32 100644
--- a/src/core/tsi/transport_security.cc
+++ b/src/core/tsi/transport_security.cc
@@ -288,7 +288,7 @@ tsi_result tsi_construct_allocated_string_peer_property(
   *property = tsi_init_peer_property();
   if (name != nullptr) property->name = gpr_strdup(name);
   if (value_length > 0) {
-    property->value.data = (char*)gpr_zalloc(value_length);
+    property->value.data = static_cast<char*>(gpr_zalloc(value_length));
     property->value.length = value_length;
   }
   return TSI_OK;
@@ -316,8 +316,8 @@ tsi_result tsi_construct_string_peer_property(const char* name,
 tsi_result tsi_construct_peer(size_t property_count, tsi_peer* peer) {
   memset(peer, 0, sizeof(tsi_peer));
   if (property_count > 0) {
-    peer->properties = (tsi_peer_property*)gpr_zalloc(
-        property_count * sizeof(tsi_peer_property));
+    peer->properties = static_cast<tsi_peer_property*>(gpr_zalloc(
+        property_count * sizeof(tsi_peer_property)));
     peer->property_count = property_count;
   }
   return TSI_OK;
diff --git a/src/core/tsi/transport_security_adapter.cc b/src/core/tsi/transport_security_adapter.cc
index 56dec55494..e57a42ad6c 100644
--- a/src/core/tsi/transport_security_adapter.cc
+++ b/src/core/tsi/transport_security_adapter.cc
@@ -59,7 +59,7 @@ static tsi_result adapter_result_get_unused_bytes(
 }
 
 static void adapter_result_destroy(tsi_handshaker_result* self) {
-  tsi_adapter_handshaker_result* impl = (tsi_adapter_handshaker_result*)self;
+  tsi_adapter_handshaker_result* impl = reinterpret_cast<tsi_adapter_handshaker_result*>(self);
   tsi_handshaker_destroy(impl->wrapped);
   gpr_free(impl->unused_bytes);
   gpr_free(self);
@@ -82,12 +82,12 @@ static tsi_result tsi_adapter_create_handshaker_result(
     return TSI_INVALID_ARGUMENT;
   }
   tsi_adapter_handshaker_result* impl =
-      (tsi_adapter_handshaker_result*)gpr_zalloc(sizeof(*impl));
+      static_cast<tsi_adapter_handshaker_result*>(gpr_zalloc(sizeof(*impl)));
   impl->base.vtable = &result_vtable;
   impl->wrapped = wrapped;
   impl->unused_bytes_size = unused_bytes_size;
   if (unused_bytes_size > 0) {
-    impl->unused_bytes = (unsigned char*)gpr_malloc(unused_bytes_size);
+    impl->unused_bytes = static_cast<unsigned char*>(gpr_malloc(unused_bytes_size));
     memcpy(impl->unused_bytes, unused_bytes, unused_bytes_size);
   } else {
     impl->unused_bytes = nullptr;
@@ -137,7 +137,7 @@ static tsi_result adapter_create_frame_protector(
 }
 
 static void adapter_destroy(tsi_handshaker* self) {
-  tsi_adapter_handshaker* impl = (tsi_adapter_handshaker*)self;
+  tsi_adapter_handshaker* impl = reinterpret_cast<tsi_adapter_handshaker*>(self);
   tsi_handshaker_destroy(impl->wrapped);
   gpr_free(impl->adapter_buffer);
   gpr_free(self);
@@ -156,7 +156,7 @@ static tsi_result adapter_next(
   }
 
   /* If there are received bytes, process them first.  */
-  tsi_adapter_handshaker* impl = (tsi_adapter_handshaker*)self;
+  tsi_adapter_handshaker* impl = reinterpret_cast<tsi_adapter_handshaker*>(self);
   tsi_result status = TSI_OK;
   size_t bytes_consumed = received_bytes_size;
   if (received_bytes_size > 0) {
@@ -174,8 +174,8 @@ static tsi_result adapter_next(
     offset += to_send_size;
     if (status == TSI_INCOMPLETE_DATA) {
       impl->adapter_buffer_size *= 2;
-      impl->adapter_buffer = (unsigned char*)gpr_realloc(
-          impl->adapter_buffer, impl->adapter_buffer_size);
+      impl->adapter_buffer = static_cast<unsigned char*>(gpr_realloc(
+          impl->adapter_buffer, impl->adapter_buffer_size));
     }
   } while (status == TSI_INCOMPLETE_DATA);
   if (status != TSI_OK) return status;
@@ -212,16 +212,16 @@ static const tsi_handshaker_vtable handshaker_vtable = {
 tsi_handshaker* tsi_create_adapter_handshaker(tsi_handshaker* wrapped) {
   GPR_ASSERT(wrapped != nullptr);
   tsi_adapter_handshaker* impl =
-      (tsi_adapter_handshaker*)gpr_zalloc(sizeof(*impl));
+      static_cast<tsi_adapter_handshaker*>(gpr_zalloc(sizeof(*impl)));
   impl->base.vtable = &handshaker_vtable;
   impl->wrapped = wrapped;
   impl->adapter_buffer_size = TSI_ADAPTER_INITIAL_BUFFER_SIZE;
-  impl->adapter_buffer = (unsigned char*)gpr_malloc(impl->adapter_buffer_size);
+  impl->adapter_buffer = static_cast<unsigned char*>(gpr_malloc(impl->adapter_buffer_size));
   return &impl->base;
 }
 
 tsi_handshaker* tsi_adapter_handshaker_get_wrapped(tsi_handshaker* adapter) {
   if (adapter == nullptr) return nullptr;
-  tsi_adapter_handshaker* impl = (tsi_adapter_handshaker*)adapter;
+  tsi_adapter_handshaker* impl = reinterpret_cast<tsi_adapter_handshaker*>(adapter);
   return impl->wrapped;
 }