Add base64 decoder
diff --git a/BUILD b/BUILD
index 1ca3578..42214c5 100644
--- a/BUILD
+++ b/BUILD
@@ -234,6 +234,7 @@
     "src/core/lib/transport/static_metadata.h",
     "src/core/lib/transport/transport.h",
     "src/core/lib/transport/transport_impl.h",
+    "src/core/ext/transport/chttp2/transport/bin_decoder.h",
     "src/core/ext/transport/chttp2/transport/bin_encoder.h",
     "src/core/ext/transport/chttp2/transport/chttp2_transport.h",
     "src/core/ext/transport/chttp2/transport/frame.h",
@@ -376,6 +377,7 @@
     "src/core/lib/transport/transport.c",
     "src/core/lib/transport/transport_op_string.c",
     "src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c",
+    "src/core/ext/transport/chttp2/transport/bin_decoder.c",
     "src/core/ext/transport/chttp2/transport/bin_encoder.c",
     "src/core/ext/transport/chttp2/transport/chttp2_plugin.c",
     "src/core/ext/transport/chttp2/transport/chttp2_transport.c",
@@ -580,6 +582,7 @@
     "src/core/lib/transport/static_metadata.h",
     "src/core/lib/transport/transport.h",
     "src/core/lib/transport/transport_impl.h",
+    "src/core/ext/transport/chttp2/transport/bin_decoder.h",
     "src/core/ext/transport/chttp2/transport/bin_encoder.h",
     "src/core/ext/transport/chttp2/transport/chttp2_transport.h",
     "src/core/ext/transport/chttp2/transport/frame.h",
@@ -709,6 +712,7 @@
     "src/core/lib/transport/transport.c",
     "src/core/lib/transport/transport_op_string.c",
     "src/core/ext/transport/chttp2/server/insecure/server_chttp2.c",
+    "src/core/ext/transport/chttp2/transport/bin_decoder.c",
     "src/core/ext/transport/chttp2/transport/bin_encoder.c",
     "src/core/ext/transport/chttp2/transport/chttp2_plugin.c",
     "src/core/ext/transport/chttp2/transport/chttp2_transport.c",
@@ -1401,6 +1405,7 @@
     "src/core/lib/transport/transport.c",
     "src/core/lib/transport/transport_op_string.c",
     "src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c",
+    "src/core/ext/transport/chttp2/transport/bin_decoder.c",
     "src/core/ext/transport/chttp2/transport/bin_encoder.c",
     "src/core/ext/transport/chttp2/transport/chttp2_plugin.c",
     "src/core/ext/transport/chttp2/transport/chttp2_transport.c",
@@ -1584,6 +1589,7 @@
     "src/core/lib/transport/static_metadata.h",
     "src/core/lib/transport/transport.h",
     "src/core/lib/transport/transport_impl.h",
+    "src/core/ext/transport/chttp2/transport/bin_decoder.h",
     "src/core/ext/transport/chttp2/transport/bin_encoder.h",
     "src/core/ext/transport/chttp2/transport/chttp2_transport.h",
     "src/core/ext/transport/chttp2/transport/frame.h",
diff --git a/Makefile b/Makefile
index f0a0ebd..ce243fc 100644
--- a/Makefile
+++ b/Makefile
@@ -889,6 +889,7 @@
 alloc_test: $(BINDIR)/$(CONFIG)/alloc_test
 alpn_test: $(BINDIR)/$(CONFIG)/alpn_test
 api_fuzzer: $(BINDIR)/$(CONFIG)/api_fuzzer
+bin_decoder_test: $(BINDIR)/$(CONFIG)/bin_decoder_test
 bin_encoder_test: $(BINDIR)/$(CONFIG)/bin_encoder_test
 census_context_test: $(BINDIR)/$(CONFIG)/census_context_test
 channel_create_test: $(BINDIR)/$(CONFIG)/channel_create_test
@@ -1227,6 +1228,7 @@
   $(BINDIR)/$(CONFIG)/algorithm_test \
   $(BINDIR)/$(CONFIG)/alloc_test \
   $(BINDIR)/$(CONFIG)/alpn_test \
+  $(BINDIR)/$(CONFIG)/bin_decoder_test \
   $(BINDIR)/$(CONFIG)/bin_encoder_test \
   $(BINDIR)/$(CONFIG)/census_context_test \
   $(BINDIR)/$(CONFIG)/channel_create_test \
@@ -1483,6 +1485,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/alloc_test || ( echo test alloc_test failed ; exit 1 )
 	$(E) "[RUN]     Testing alpn_test"
 	$(Q) $(BINDIR)/$(CONFIG)/alpn_test || ( echo test alpn_test failed ; exit 1 )
+	$(E) "[RUN]     Testing bin_decoder_test"
+	$(Q) $(BINDIR)/$(CONFIG)/bin_decoder_test || ( echo test bin_decoder_test failed ; exit 1 )
 	$(E) "[RUN]     Testing bin_encoder_test"
 	$(Q) $(BINDIR)/$(CONFIG)/bin_encoder_test || ( echo test bin_encoder_test failed ; exit 1 )
 	$(E) "[RUN]     Testing census_context_test"
@@ -2575,6 +2579,7 @@
     src/core/lib/transport/transport.c \
     src/core/lib/transport/transport_op_string.c \
     src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c \
+    src/core/ext/transport/chttp2/transport/bin_decoder.c \
     src/core/ext/transport/chttp2/transport/bin_encoder.c \
     src/core/ext/transport/chttp2/transport/chttp2_plugin.c \
     src/core/ext/transport/chttp2/transport/chttp2_transport.c \
@@ -2917,6 +2922,7 @@
     src/core/lib/transport/transport.c \
     src/core/lib/transport/transport_op_string.c \
     src/core/ext/transport/chttp2/server/insecure/server_chttp2.c \
+    src/core/ext/transport/chttp2/transport/bin_decoder.c \
     src/core/ext/transport/chttp2/transport/bin_encoder.c \
     src/core/ext/transport/chttp2/transport/chttp2_plugin.c \
     src/core/ext/transport/chttp2/transport/chttp2_transport.c \
@@ -6137,6 +6143,38 @@
 endif
 
 
+BIN_DECODER_TEST_SRC = \
+    test/core/transport/chttp2/bin_decoder_test.c \
+
+BIN_DECODER_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(BIN_DECODER_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/bin_decoder_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/bin_decoder_test: $(BIN_DECODER_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(BIN_DECODER_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/bin_decoder_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/transport/chttp2/bin_decoder_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a
+
+deps_bin_decoder_test: $(BIN_DECODER_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(BIN_DECODER_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 BIN_ENCODER_TEST_SRC = \
     test/core/transport/chttp2/bin_encoder_test.c \
 
diff --git a/binding.gyp b/binding.gyp
index 8bc2aee..df497ec 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -646,6 +646,7 @@
         'src/core/lib/transport/transport.c',
         'src/core/lib/transport/transport_op_string.c',
         'src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c',
+        'src/core/ext/transport/chttp2/transport/bin_decoder.c',
         'src/core/ext/transport/chttp2/transport/bin_encoder.c',
         'src/core/ext/transport/chttp2/transport/chttp2_plugin.c',
         'src/core/ext/transport/chttp2/transport/chttp2_transport.c',
diff --git a/build.yaml b/build.yaml
index 187eb9c..5ba8405 100644
--- a/build.yaml
+++ b/build.yaml
@@ -466,6 +466,7 @@
   - gpr_test_util
 - name: grpc_transport_chttp2
   headers:
+  - src/core/ext/transport/chttp2/transport/bin_decoder.h
   - src/core/ext/transport/chttp2/transport/bin_encoder.h
   - src/core/ext/transport/chttp2/transport/chttp2_transport.h
   - src/core/ext/transport/chttp2/transport/frame.h
@@ -487,6 +488,7 @@
   - src/core/ext/transport/chttp2/transport/timeout_encoding.h
   - src/core/ext/transport/chttp2/transport/varint.h
   src:
+  - src/core/ext/transport/chttp2/transport/bin_decoder.c
   - src/core/ext/transport/chttp2/transport/bin_encoder.c
   - src/core/ext/transport/chttp2/transport/chttp2_plugin.c
   - src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -1140,6 +1142,14 @@
   - test/core/end2end/fuzzers/api_fuzzer_corpus
   dict: test/core/end2end/fuzzers/api_fuzzer.dictionary
   maxlen: 2048
+- name: bin_decoder_test
+  build: test
+  language: c
+  src:
+  - test/core/transport/chttp2/bin_decoder_test.c
+  deps:
+  - grpc_test_util
+  - grpc
 - name: bin_encoder_test
   build: test
   language: c
diff --git a/config.m4 b/config.m4
index c8d2aae..2bdcd0e 100644
--- a/config.m4
+++ b/config.m4
@@ -165,6 +165,7 @@
     src/core/lib/transport/transport.c \
     src/core/lib/transport/transport_op_string.c \
     src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c \
+    src/core/ext/transport/chttp2/transport/bin_decoder.c \
     src/core/ext/transport/chttp2/transport/bin_encoder.c \
     src/core/ext/transport/chttp2/transport/chttp2_plugin.c \
     src/core/ext/transport/chttp2/transport/chttp2_transport.c \
diff --git a/gRPC.podspec b/gRPC.podspec
index 3937332..a3a97a1 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -237,6 +237,7 @@
                       'src/core/lib/transport/static_metadata.h',
                       'src/core/lib/transport/transport.h',
                       'src/core/lib/transport/transport_impl.h',
+                      'src/core/ext/transport/chttp2/transport/bin_decoder.h',
                       'src/core/ext/transport/chttp2/transport/bin_encoder.h',
                       'src/core/ext/transport/chttp2/transport/chttp2_transport.h',
                       'src/core/ext/transport/chttp2/transport/frame.h',
@@ -412,6 +413,7 @@
                       'src/core/lib/transport/transport.c',
                       'src/core/lib/transport/transport_op_string.c',
                       'src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c',
+                      'src/core/ext/transport/chttp2/transport/bin_decoder.c',
                       'src/core/ext/transport/chttp2/transport/bin_encoder.c',
                       'src/core/ext/transport/chttp2/transport/chttp2_plugin.c',
                       'src/core/ext/transport/chttp2/transport/chttp2_transport.c',
@@ -580,6 +582,7 @@
                               'src/core/lib/transport/static_metadata.h',
                               'src/core/lib/transport/transport.h',
                               'src/core/lib/transport/transport_impl.h',
+                              'src/core/ext/transport/chttp2/transport/bin_decoder.h',
                               'src/core/ext/transport/chttp2/transport/bin_encoder.h',
                               'src/core/ext/transport/chttp2/transport/chttp2_transport.h',
                               'src/core/ext/transport/chttp2/transport/frame.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 240ea1c..4a698f9 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -245,6 +245,7 @@
   s.files += %w( src/core/lib/transport/static_metadata.h )
   s.files += %w( src/core/lib/transport/transport.h )
   s.files += %w( src/core/lib/transport/transport_impl.h )
+  s.files += %w( src/core/ext/transport/chttp2/transport/bin_decoder.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/bin_encoder.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/chttp2_transport.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/frame.h )
@@ -391,6 +392,7 @@
   s.files += %w( src/core/lib/transport/transport.c )
   s.files += %w( src/core/lib/transport/transport_op_string.c )
   s.files += %w( src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c )
+  s.files += %w( src/core/ext/transport/chttp2/transport/bin_decoder.c )
   s.files += %w( src/core/ext/transport/chttp2/transport/bin_encoder.c )
   s.files += %w( src/core/ext/transport/chttp2/transport/chttp2_plugin.c )
   s.files += %w( src/core/ext/transport/chttp2/transport/chttp2_transport.c )
diff --git a/package.xml b/package.xml
index 4c159e6..d6a4f2e 100644
--- a/package.xml
+++ b/package.xml
@@ -252,6 +252,7 @@
     <file baseinstalldir="/" name="src/core/lib/transport/static_metadata.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/transport/transport.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/transport/transport_impl.h" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/transport/chttp2/transport/bin_decoder.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/transport/bin_encoder.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/transport/chttp2_transport.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/transport/frame.h" role="src" />
@@ -398,6 +399,7 @@
     <file baseinstalldir="/" name="src/core/lib/transport/transport.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/transport/transport_op_string.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/transport/chttp2/transport/bin_decoder.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/transport/bin_encoder.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/transport/chttp2_plugin.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/transport/chttp2_transport.c" role="src" />
diff --git a/src/core/ext/transport/chttp2/transport/bin_decoder.c b/src/core/ext/transport/chttp2/transport/bin_decoder.c
new file mode 100644
index 0000000..fe6c84b
--- /dev/null
+++ b/src/core/ext/transport/chttp2/transport/bin_decoder.c
@@ -0,0 +1,115 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/ext/transport/chttp2/transport/bin_decoder.h"
+#include <grpc/support/log.h>
+#include <stdio.h>
+
+static uint8_t decode_table[] = {
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  62, 0,  0,  0,  63, 52, 53, 54, 55, 56, 57, 58, 59, 60,
+    61, 0,  0,  0,  0,  0,  0,  0,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10,
+    11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0,  0,  0,  0,
+    0,  0,  26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
+    43, 44, 45, 46, 47, 48, 49, 50, 51, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,  0,  0,  0,  0,  0,  0};
+
+static const uint8_t tail_xtra[4] = {0, 0, 1, 2};
+
+gpr_slice grpc_chttp2_base64_decode(gpr_slice input) {
+  size_t input_length = GPR_SLICE_LENGTH(input);
+  GPR_ASSERT(input_length % 4 == 0);
+  size_t output_length = input_length / 4 * 3;
+
+  if (input_length > 0) {
+    uint8_t *input_end = GPR_SLICE_END_PTR(input);
+    if (*(--input_end) == '=') {
+      output_length--;
+      if (*(--input_end) == '=') {
+        output_length--;
+      }
+    }
+  }
+
+  gpr_log(GPR_ERROR, "input_length: %d, output_length: %d\n", input_length,
+          output_length);
+
+  return grpc_chttp2_base64_decode_with_length(input, output_length);
+}
+
+gpr_slice grpc_chttp2_base64_decode_with_length(gpr_slice input,
+                                                size_t output_length) {
+  size_t input_length = GPR_SLICE_LENGTH(input);
+  // The length of a base64 string cannot be 4 * n + 1
+  GPR_ASSERT(input_length % 4 != 1);
+  GPR_ASSERT(output_length <=
+             input_length / 4 * 3 + tail_xtra[input_length % 4]);
+  size_t output_triplets = output_length / 3;
+  size_t tail_case = output_length % 3;
+  gpr_slice output = gpr_slice_malloc(output_length);
+  uint8_t *in = GPR_SLICE_START_PTR(input);
+  uint8_t *out = GPR_SLICE_START_PTR(output);
+  size_t i;
+
+  for (i = 0; i < output_triplets; i++) {
+    out[0] = (uint8_t)((decode_table[in[0]] << 2) | (decode_table[in[1]] >> 4));
+    out[1] = (uint8_t)((decode_table[in[1]] << 4) | (decode_table[in[2]] >> 2));
+    out[2] = (uint8_t)((decode_table[in[2]] << 6) | decode_table[in[3]]);
+    out += 3;
+    in += 4;
+  }
+
+  if (tail_case > 0) {
+    switch (tail_case) {
+      case 2:
+        out[1] =
+            (uint8_t)((decode_table[in[1]] << 4) | (decode_table[in[2]] >> 2));
+      case 1:
+        out[0] =
+            (uint8_t)((decode_table[in[0]] << 2) | (decode_table[in[1]] >> 4));
+    }
+    out += tail_case;
+    in += tail_case + 1;
+  }
+
+  GPR_ASSERT(out == GPR_SLICE_END_PTR(output));
+  GPR_ASSERT(in <= GPR_SLICE_END_PTR(input));
+  return output;
+}
diff --git a/src/core/ext/transport/chttp2/transport/bin_decoder.h b/src/core/ext/transport/chttp2/transport/bin_decoder.h
new file mode 100644
index 0000000..5516f86
--- /dev/null
+++ b/src/core/ext/transport/chttp2/transport/bin_decoder.h
@@ -0,0 +1,48 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H
+
+#include <grpc/support/slice.h>
+
+/* base64 decode a slice with pad chars. Returns a new slice, does not take
+   ownership of the input */
+gpr_slice grpc_chttp2_base64_decode(gpr_slice input);
+
+/* base64 decode a slice without pad chars, data length is needed. Returns a new
+   slice, does not take ownership of the input */
+gpr_slice grpc_chttp2_base64_decode_with_length(gpr_slice input,
+                                                size_t output_length);
+
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H */
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 4b98dc1..f6508a3 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -159,6 +159,7 @@
   'src/core/lib/transport/transport.c',
   'src/core/lib/transport/transport_op_string.c',
   'src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c',
+  'src/core/ext/transport/chttp2/transport/bin_decoder.c',
   'src/core/ext/transport/chttp2/transport/bin_encoder.c',
   'src/core/ext/transport/chttp2/transport/chttp2_plugin.c',
   'src/core/ext/transport/chttp2/transport/chttp2_transport.c',
diff --git a/test/core/transport/chttp2/bin_decoder_test.c b/test/core/transport/chttp2/bin_decoder_test.c
new file mode 100644
index 0000000..980da02
--- /dev/null
+++ b/test/core/transport/chttp2/bin_decoder_test.c
@@ -0,0 +1,120 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/ext/transport/chttp2/transport/bin_decoder.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/log.h>
+#include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
+#include "src/core/lib/support/string.h"
+
+static int all_ok = 1;
+
+static void expect_slice_eq(gpr_slice expected, gpr_slice slice, char *debug,
+                            int line) {
+  if (0 != gpr_slice_cmp(slice, expected)) {
+    char *hs = gpr_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
+    char *he = gpr_dump_slice(expected, GPR_DUMP_HEX | GPR_DUMP_ASCII);
+    gpr_log(GPR_ERROR, "FAILED:%d: %s\ngot:  %s\nwant: %s", line, debug, hs,
+            he);
+    gpr_free(hs);
+    gpr_free(he);
+    all_ok = 0;
+  }
+  gpr_slice_unref(expected);
+  gpr_slice_unref(slice);
+}
+
+static gpr_slice base64_encode(const char *s) {
+  gpr_slice ss = gpr_slice_from_copied_string(s);
+  gpr_slice out = grpc_chttp2_base64_encode(ss);
+  gpr_slice_unref(ss);
+  return out;
+}
+
+static gpr_slice base64_decode(const char *s) {
+  gpr_slice ss = gpr_slice_from_copied_string(s);
+  gpr_slice out = grpc_chttp2_base64_decode(ss);
+  gpr_slice_unref(ss);
+  return out;
+}
+
+#define EXPECT_SLICE_EQ(expected, slice)                                   \
+  expect_slice_eq(                                                         \
+      gpr_slice_from_copied_buffer(expected, sizeof(expected) - 1), slice, \
+      #slice, __LINE__);
+
+#define ENCODE_AND_DECODE(s) \
+  EXPECT_SLICE_EQ(           \
+      s, grpc_chttp2_base64_decode_with_length(base64_encode(s), strlen(s)));
+
+int main(int argc, char **argv) {
+  /*
+   * ENCODE_AND_DECODE tests grpc_chttp2_base64_decode_with_length(), which
+   * takes encoded base64 strings without pad chars, but output length is
+   * required
+   */
+  /* Base64 test vectors from RFC 4648 */
+  ENCODE_AND_DECODE("");
+  ENCODE_AND_DECODE("f");
+  ENCODE_AND_DECODE("foo");
+  ENCODE_AND_DECODE("fo");
+  ENCODE_AND_DECODE("foob");
+  ENCODE_AND_DECODE("fooba");
+  ENCODE_AND_DECODE("foobar");
+
+  ENCODE_AND_DECODE("\xc0\xc1\xc2\xc3\xc4\xc5");
+
+  /* Base64 test vectors from RFC 4648, with pad chars */
+  /* BASE64("") = "" */
+  EXPECT_SLICE_EQ("", base64_decode(""));
+  /* BASE64("f") = "Zg==" */
+  EXPECT_SLICE_EQ("f", base64_decode("Zg=="));
+  /* BASE64("fo") = "Zm8=" */
+  EXPECT_SLICE_EQ("fo", base64_decode("Zm8="));
+  /* BASE64("foo") = "Zm9v" */
+  EXPECT_SLICE_EQ("foo", base64_decode("Zm9v"));
+  /* BASE64("foob") = "Zm9vYg==" */
+  EXPECT_SLICE_EQ("foob", base64_decode("Zm9vYg=="));
+  /* BASE64("fooba") = "Zm9vYmE=" */
+  EXPECT_SLICE_EQ("fooba", base64_decode("Zm9vYmE="));
+  /* BASE64("foobar") = "Zm9vYmFy" */
+  EXPECT_SLICE_EQ("foobar", base64_decode("Zm9vYmFy"));
+
+  EXPECT_SLICE_EQ("\xc0\xc1\xc2\xc3\xc4\xc5", base64_decode("wMHCw8TF"));
+
+  return all_ok ? 0 : 1;
+}
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 7e0d5eb..670afe1 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -862,6 +862,7 @@
 src/core/lib/transport/static_metadata.h \
 src/core/lib/transport/transport.h \
 src/core/lib/transport/transport_impl.h \
+src/core/ext/transport/chttp2/transport/bin_decoder.h \
 src/core/ext/transport/chttp2/transport/bin_encoder.h \
 src/core/ext/transport/chttp2/transport/chttp2_transport.h \
 src/core/ext/transport/chttp2/transport/frame.h \
@@ -1008,6 +1009,7 @@
 src/core/lib/transport/transport.c \
 src/core/lib/transport/transport_op_string.c \
 src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c \
+src/core/ext/transport/chttp2/transport/bin_decoder.c \
 src/core/ext/transport/chttp2/transport/bin_encoder.c \
 src/core/ext/transport/chttp2/transport/chttp2_plugin.c \
 src/core/ext/transport/chttp2/transport/chttp2_transport.c \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index b36f0a8..da54d55 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -86,6 +86,20 @@
     ], 
     "headers": [], 
     "language": "c", 
+    "name": "bin_decoder_test", 
+    "src": [
+      "test/core/transport/chttp2/bin_decoder_test.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
     "name": "bin_encoder_test", 
     "src": [
       "test/core/transport/chttp2/bin_encoder_test.c"
@@ -6150,6 +6164,7 @@
       "grpc_transport_chttp2_alpn"
     ], 
     "headers": [
+      "src/core/ext/transport/chttp2/transport/bin_decoder.h", 
       "src/core/ext/transport/chttp2/transport/bin_encoder.h", 
       "src/core/ext/transport/chttp2/transport/chttp2_transport.h", 
       "src/core/ext/transport/chttp2/transport/frame.h", 
@@ -6174,6 +6189,8 @@
     "language": "c", 
     "name": "grpc_transport_chttp2", 
     "src": [
+      "src/core/ext/transport/chttp2/transport/bin_decoder.c", 
+      "src/core/ext/transport/chttp2/transport/bin_decoder.h", 
       "src/core/ext/transport/chttp2/transport/bin_encoder.c", 
       "src/core/ext/transport/chttp2/transport/bin_encoder.h", 
       "src/core/ext/transport/chttp2/transport/chttp2_plugin.c", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 581b8fd..604296a 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -98,6 +98,27 @@
     "flaky": false, 
     "gtest": false, 
     "language": "c", 
+    "name": "bin_decoder_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c", 
     "name": "bin_encoder_test", 
     "platforms": [
       "linux", 
diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index be8b5d4..931ceef 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -160,6 +160,15 @@
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "bin_decoder_test", "vcxproj\test\bin_decoder_test\bin_decoder_test.vcxproj", "{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}"
+	ProjectSection(myProperties) = preProject
+        	lib = "False"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+	EndProjectSection
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "bin_encoder_test", "vcxproj\test\bin_encoder_test\bin_encoder_test.vcxproj", "{D5C70922-D68E-0E9D-9988-995E0F9A79AE}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -1675,6 +1684,22 @@
 		{5BAAE7EA-A972-DD80-F190-29B9E3110BB3}.Release-DLL|Win32.Build.0 = Release|Win32
 		{5BAAE7EA-A972-DD80-F190-29B9E3110BB3}.Release-DLL|x64.ActiveCfg = Release|x64
 		{5BAAE7EA-A972-DD80-F190-29B9E3110BB3}.Release-DLL|x64.Build.0 = Release|x64
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Debug|Win32.ActiveCfg = Debug|Win32
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Debug|x64.ActiveCfg = Debug|x64
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Release|Win32.ActiveCfg = Release|Win32
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Release|x64.ActiveCfg = Release|x64
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Debug|Win32.Build.0 = Debug|Win32
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Debug|x64.Build.0 = Debug|x64
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Release|Win32.Build.0 = Release|Win32
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Release|x64.Build.0 = Release|x64
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Debug-DLL|x64.Build.0 = Debug|x64
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Release-DLL|Win32.Build.0 = Release|Win32
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Release-DLL|x64.ActiveCfg = Release|x64
+		{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}.Release-DLL|x64.Build.0 = Release|x64
 		{D5C70922-D68E-0E9D-9988-995E0F9A79AE}.Debug|Win32.ActiveCfg = Debug|Win32
 		{D5C70922-D68E-0E9D-9988-995E0F9A79AE}.Debug|x64.ActiveCfg = Debug|x64
 		{D5C70922-D68E-0E9D-9988-995E0F9A79AE}.Release|Win32.ActiveCfg = Release|Win32
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 6a2843e..0791e2a 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -371,6 +371,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\static_metadata.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\transport.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\transport_impl.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_decoder.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\chttp2_transport.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\frame.h" />
@@ -602,6 +603,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\secure\server_secure_chttp2.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_decoder.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\chttp2_plugin.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 7d53be7..a727dc3 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -250,6 +250,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\secure\server_secure_chttp2.c">
       <Filter>src\core\ext\transport\chttp2\server\secure</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_decoder.c">
+      <Filter>src\core\ext\transport\chttp2\transport</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.c">
       <Filter>src\core\ext\transport\chttp2\transport</Filter>
     </ClCompile>
@@ -806,6 +809,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\transport_impl.h">
       <Filter>src\core\lib\transport</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_decoder.h">
+      <Filter>src\core\ext\transport\chttp2\transport</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.h">
       <Filter>src\core\ext\transport\chttp2\transport</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index fbf26a2..0c183c1 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -360,6 +360,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\static_metadata.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\transport.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\transport_impl.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_decoder.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\chttp2_transport.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\frame.h" />
@@ -579,6 +580,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_decoder.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\chttp2_plugin.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 2500d5c..7ce4445 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -253,6 +253,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2.c">
       <Filter>src\core\ext\transport\chttp2\server\insecure</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_decoder.c">
+      <Filter>src\core\ext\transport\chttp2\transport</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.c">
       <Filter>src\core\ext\transport\chttp2\transport</Filter>
     </ClCompile>
@@ -740,6 +743,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\transport_impl.h">
       <Filter>src\core\lib\transport</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_decoder.h">
+      <Filter>src\core\ext\transport\chttp2\transport</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.h">
       <Filter>src\core\ext\transport\chttp2\transport</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/test/bin_decoder_test/bin_decoder_test.vcxproj b/vsprojects/vcxproj/test/bin_decoder_test/bin_decoder_test.vcxproj
new file mode 100644
index 0000000..b0c878f
--- /dev/null
+++ b/vsprojects/vcxproj/test/bin_decoder_test/bin_decoder_test.vcxproj
@@ -0,0 +1,193 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{6BFAC6BA-3B9D-E8F5-BE35-91E8EFB9E25B}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
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diff --git a/vsprojects/vcxproj/test/bin_decoder_test/bin_decoder_test.vcxproj.filters b/vsprojects/vcxproj/test/bin_decoder_test/bin_decoder_test.vcxproj.filters
new file mode 100644
index 0000000..f604465
--- /dev/null
+++ b/vsprojects/vcxproj/test/bin_decoder_test/bin_decoder_test.vcxproj.filters
@@ -0,0 +1,24 @@
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