diff --git a/tests/unit/asn1_decoder_test.cpp b/tests/unit/asn1_decoder_test.cpp
index 997639d..b334a65 100644
--- a/tests/unit/asn1_decoder_test.cpp
+++ b/tests/unit/asn1_decoder_test.cpp
@@ -14,225 +14,188 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "asn1_decoder_test"
-
-#include <cutils/log.h>
-#include <gtest/gtest.h>
 #include <stdint.h>
-#include <unistd.h>
+
+#include <memory>
+
+#include <gtest/gtest.h>
 
 #include "asn1_decoder.h"
 
-namespace android {
+TEST(Asn1DecoderTest, Empty_Failure) {
+  uint8_t empty[] = {};
+  asn1_context ctx(empty, sizeof(empty));
 
-class Asn1DecoderTest : public testing::Test {
-};
+  ASSERT_EQ(nullptr, ctx.asn1_constructed_get());
+  ASSERT_FALSE(ctx.asn1_constructed_skip_all());
+  ASSERT_EQ(0, ctx.asn1_constructed_type());
+  ASSERT_EQ(nullptr, ctx.asn1_sequence_get());
+  ASSERT_EQ(nullptr, ctx.asn1_set_get());
+  ASSERT_FALSE(ctx.asn1_sequence_next());
 
-TEST_F(Asn1DecoderTest, Empty_Failure) {
-    uint8_t empty[] = { };
-    asn1_context_t* ctx = asn1_context_new(empty, sizeof(empty));
-
-    EXPECT_EQ(NULL, asn1_constructed_get(ctx));
-    EXPECT_FALSE(asn1_constructed_skip_all(ctx));
-    EXPECT_EQ(0, asn1_constructed_type(ctx));
-    EXPECT_EQ(NULL, asn1_sequence_get(ctx));
-    EXPECT_EQ(NULL, asn1_set_get(ctx));
-    EXPECT_FALSE(asn1_sequence_next(ctx));
-
-    const uint8_t* junk;
-    size_t length;
-    EXPECT_FALSE(asn1_oid_get(ctx, &junk, &length));
-    EXPECT_FALSE(asn1_octet_string_get(ctx, &junk, &length));
-
-    asn1_context_free(ctx);
+  const uint8_t* junk;
+  size_t length;
+  ASSERT_FALSE(ctx.asn1_oid_get(&junk, &length));
+  ASSERT_FALSE(ctx.asn1_octet_string_get(&junk, &length));
 }
 
-TEST_F(Asn1DecoderTest, ConstructedGet_TruncatedLength_Failure) {
-    uint8_t truncated[] = { 0xA0, 0x82, };
-    asn1_context_t* ctx = asn1_context_new(truncated, sizeof(truncated));
-    EXPECT_EQ(NULL, asn1_constructed_get(ctx));
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, ConstructedGet_TruncatedLength_Failure) {
+  uint8_t truncated[] = { 0xA0, 0x82 };
+  asn1_context ctx(truncated, sizeof(truncated));
+  ASSERT_EQ(nullptr, ctx.asn1_constructed_get());
 }
 
-TEST_F(Asn1DecoderTest, ConstructedGet_LengthTooBig_Failure) {
-    uint8_t truncated[] = { 0xA0, 0x8a, 0xA5, 0x5A, 0xA5, 0x5A,
-                            0xA5, 0x5A, 0xA5, 0x5A, 0xA5, 0x5A, };
-    asn1_context_t* ctx = asn1_context_new(truncated, sizeof(truncated));
-    EXPECT_EQ(NULL, asn1_constructed_get(ctx));
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, ConstructedGet_LengthTooBig_Failure) {
+  uint8_t truncated[] = { 0xA0, 0x8a, 0xA5, 0x5A, 0xA5, 0x5A, 0xA5, 0x5A, 0xA5, 0x5A, 0xA5, 0x5A };
+  asn1_context ctx(truncated, sizeof(truncated));
+  ASSERT_EQ(nullptr, ctx.asn1_constructed_get());
 }
 
-TEST_F(Asn1DecoderTest, ConstructedGet_TooSmallForChild_Failure) {
-    uint8_t data[] = { 0xA5, 0x02, 0x06, 0x01, 0x01, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    asn1_context_t* ptr = asn1_constructed_get(ctx);
-    ASSERT_NE((asn1_context_t*)NULL, ptr);
-    EXPECT_EQ(5, asn1_constructed_type(ptr));
-    const uint8_t* oid;
-    size_t length;
-    EXPECT_FALSE(asn1_oid_get(ptr, &oid, &length));
-    asn1_context_free(ptr);
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, ConstructedGet_TooSmallForChild_Failure) {
+  uint8_t data[] = { 0xA5, 0x02, 0x06, 0x01, 0x01 };
+  asn1_context ctx(data, sizeof(data));
+  std::unique_ptr<asn1_context> ptr(ctx.asn1_constructed_get());
+  ASSERT_NE(nullptr, ptr);
+  ASSERT_EQ(5, ptr->asn1_constructed_type());
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_FALSE(ptr->asn1_oid_get(&oid, &length));
 }
 
-TEST_F(Asn1DecoderTest, ConstructedGet_Success) {
-    uint8_t data[] = { 0xA5, 0x03, 0x06, 0x01, 0x01, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    asn1_context_t* ptr = asn1_constructed_get(ctx);
-    ASSERT_NE((asn1_context_t*)NULL, ptr);
-    EXPECT_EQ(5, asn1_constructed_type(ptr));
-    const uint8_t* oid;
-    size_t length;
-    ASSERT_TRUE(asn1_oid_get(ptr, &oid, &length));
-    EXPECT_EQ(1U, length);
-    EXPECT_EQ(0x01U, *oid);
-    asn1_context_free(ptr);
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, ConstructedGet_Success) {
+  uint8_t data[] = { 0xA5, 0x03, 0x06, 0x01, 0x01 };
+  asn1_context ctx(data, sizeof(data));
+  std::unique_ptr<asn1_context> ptr(ctx.asn1_constructed_get());
+  ASSERT_NE(nullptr, ptr);
+  ASSERT_EQ(5, ptr->asn1_constructed_type());
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_TRUE(ptr->asn1_oid_get(&oid, &length));
+  ASSERT_EQ(1U, length);
+  ASSERT_EQ(0x01U, *oid);
 }
 
-TEST_F(Asn1DecoderTest, ConstructedSkipAll_TruncatedLength_Failure) {
-    uint8_t truncated[] = { 0xA2, 0x82, };
-    asn1_context_t* ctx = asn1_context_new(truncated, sizeof(truncated));
-    EXPECT_FALSE(asn1_constructed_skip_all(ctx));
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, ConstructedSkipAll_TruncatedLength_Failure) {
+  uint8_t truncated[] = { 0xA2, 0x82 };
+  asn1_context ctx(truncated, sizeof(truncated));
+  ASSERT_FALSE(ctx.asn1_constructed_skip_all());
 }
 
-TEST_F(Asn1DecoderTest, ConstructedSkipAll_Success) {
-    uint8_t data[] = { 0xA0, 0x03, 0x02, 0x01, 0x01,
-                            0xA1, 0x03, 0x02, 0x01, 0x01,
-                            0x06, 0x01, 0xA5, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    ASSERT_TRUE(asn1_constructed_skip_all(ctx));
-    const uint8_t* oid;
-    size_t length;
-    ASSERT_TRUE(asn1_oid_get(ctx, &oid, &length));
-    EXPECT_EQ(1U, length);
-    EXPECT_EQ(0xA5U, *oid);
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, ConstructedSkipAll_Success) {
+  uint8_t data[] = { 0xA0, 0x03, 0x02, 0x01, 0x01, 0xA1, 0x03, 0x02, 0x01, 0x01, 0x06, 0x01, 0xA5 };
+  asn1_context ctx(data, sizeof(data));
+  ASSERT_TRUE(ctx.asn1_constructed_skip_all());
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_TRUE(ctx.asn1_oid_get(&oid, &length));
+  ASSERT_EQ(1U, length);
+  ASSERT_EQ(0xA5U, *oid);
 }
 
-TEST_F(Asn1DecoderTest, SequenceGet_TruncatedLength_Failure) {
-    uint8_t truncated[] = { 0x30, 0x82, };
-    asn1_context_t* ctx = asn1_context_new(truncated, sizeof(truncated));
-    EXPECT_EQ(NULL, asn1_sequence_get(ctx));
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, SequenceGet_TruncatedLength_Failure) {
+  uint8_t truncated[] = { 0x30, 0x82 };
+  asn1_context ctx(truncated, sizeof(truncated));
+  ASSERT_EQ(nullptr, ctx.asn1_sequence_get());
 }
 
-TEST_F(Asn1DecoderTest, SequenceGet_TooSmallForChild_Failure) {
-    uint8_t data[] = { 0x30, 0x02, 0x06, 0x01, 0x01, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    asn1_context_t* ptr = asn1_sequence_get(ctx);
-    ASSERT_NE((asn1_context_t*)NULL, ptr);
-    const uint8_t* oid;
-    size_t length;
-    EXPECT_FALSE(asn1_oid_get(ptr, &oid, &length));
-    asn1_context_free(ptr);
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, SequenceGet_TooSmallForChild_Failure) {
+  uint8_t data[] = { 0x30, 0x02, 0x06, 0x01, 0x01 };
+  asn1_context ctx(data, sizeof(data));
+  std::unique_ptr<asn1_context> ptr(ctx.asn1_sequence_get());
+  ASSERT_NE(nullptr, ptr);
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_FALSE(ptr->asn1_oid_get(&oid, &length));
 }
 
-TEST_F(Asn1DecoderTest, SequenceGet_Success) {
-    uint8_t data[] = { 0x30, 0x03, 0x06, 0x01, 0x01, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    asn1_context_t* ptr = asn1_sequence_get(ctx);
-    ASSERT_NE((asn1_context_t*)NULL, ptr);
-    const uint8_t* oid;
-    size_t length;
-    ASSERT_TRUE(asn1_oid_get(ptr, &oid, &length));
-    EXPECT_EQ(1U, length);
-    EXPECT_EQ(0x01U, *oid);
-    asn1_context_free(ptr);
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, SequenceGet_Success) {
+  uint8_t data[] = { 0x30, 0x03, 0x06, 0x01, 0x01 };
+  asn1_context ctx(data, sizeof(data));
+  std::unique_ptr<asn1_context> ptr(ctx.asn1_sequence_get());
+  ASSERT_NE(nullptr, ptr);
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_TRUE(ptr->asn1_oid_get(&oid, &length));
+  ASSERT_EQ(1U, length);
+  ASSERT_EQ(0x01U, *oid);
 }
 
-TEST_F(Asn1DecoderTest, SetGet_TruncatedLength_Failure) {
-    uint8_t truncated[] = { 0x31, 0x82, };
-    asn1_context_t* ctx = asn1_context_new(truncated, sizeof(truncated));
-    EXPECT_EQ(NULL, asn1_set_get(ctx));
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, SetGet_TruncatedLength_Failure) {
+  uint8_t truncated[] = { 0x31, 0x82 };
+  asn1_context ctx(truncated, sizeof(truncated));
+  ASSERT_EQ(nullptr, ctx.asn1_set_get());
 }
 
-TEST_F(Asn1DecoderTest, SetGet_TooSmallForChild_Failure) {
-    uint8_t data[] = { 0x31, 0x02, 0x06, 0x01, 0x01, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    asn1_context_t* ptr = asn1_set_get(ctx);
-    ASSERT_NE((asn1_context_t*)NULL, ptr);
-    const uint8_t* oid;
-    size_t length;
-    EXPECT_FALSE(asn1_oid_get(ptr, &oid, &length));
-    asn1_context_free(ptr);
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, SetGet_TooSmallForChild_Failure) {
+  uint8_t data[] = { 0x31, 0x02, 0x06, 0x01, 0x01 };
+  asn1_context ctx(data, sizeof(data));
+  std::unique_ptr<asn1_context> ptr(ctx.asn1_set_get());
+  ASSERT_NE(nullptr, ptr);
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_FALSE(ptr->asn1_oid_get(&oid, &length));
 }
 
-TEST_F(Asn1DecoderTest, SetGet_Success) {
-    uint8_t data[] = { 0x31, 0x03, 0x06, 0x01, 0xBA, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    asn1_context_t* ptr = asn1_set_get(ctx);
-    ASSERT_NE((asn1_context_t*)NULL, ptr);
-    const uint8_t* oid;
-    size_t length;
-    ASSERT_TRUE(asn1_oid_get(ptr, &oid, &length));
-    EXPECT_EQ(1U, length);
-    EXPECT_EQ(0xBAU, *oid);
-    asn1_context_free(ptr);
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, SetGet_Success) {
+  uint8_t data[] = { 0x31, 0x03, 0x06, 0x01, 0xBA };
+  asn1_context ctx(data, sizeof(data));
+  std::unique_ptr<asn1_context> ptr(ctx.asn1_set_get());
+  ASSERT_NE(nullptr, ptr);
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_TRUE(ptr->asn1_oid_get(&oid, &length));
+  ASSERT_EQ(1U, length);
+  ASSERT_EQ(0xBAU, *oid);
 }
 
-TEST_F(Asn1DecoderTest, OidGet_LengthZero_Failure) {
-    uint8_t data[] = { 0x06, 0x00, 0x01, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    const uint8_t* oid;
-    size_t length;
-    EXPECT_FALSE(asn1_oid_get(ctx, &oid, &length));
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, OidGet_LengthZero_Failure) {
+  uint8_t data[] = { 0x06, 0x00, 0x01 };
+  asn1_context ctx(data, sizeof(data));
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_FALSE(ctx.asn1_oid_get(&oid, &length));
 }
 
-TEST_F(Asn1DecoderTest, OidGet_TooSmall_Failure) {
-    uint8_t data[] = { 0x06, 0x01, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    const uint8_t* oid;
-    size_t length;
-    EXPECT_FALSE(asn1_oid_get(ctx, &oid, &length));
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, OidGet_TooSmall_Failure) {
+  uint8_t data[] = { 0x06, 0x01 };
+  asn1_context ctx(data, sizeof(data));
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_FALSE(ctx.asn1_oid_get(&oid, &length));
 }
 
-TEST_F(Asn1DecoderTest, OidGet_Success) {
-    uint8_t data[] = { 0x06, 0x01, 0x99, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    const uint8_t* oid;
-    size_t length;
-    ASSERT_TRUE(asn1_oid_get(ctx, &oid, &length));
-    EXPECT_EQ(1U, length);
-    EXPECT_EQ(0x99U, *oid);
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, OidGet_Success) {
+  uint8_t data[] = { 0x06, 0x01, 0x99 };
+  asn1_context ctx(data, sizeof(data));
+  const uint8_t* oid;
+  size_t length;
+  ASSERT_TRUE(ctx.asn1_oid_get(&oid, &length));
+  ASSERT_EQ(1U, length);
+  ASSERT_EQ(0x99U, *oid);
 }
 
-TEST_F(Asn1DecoderTest, OctetStringGet_LengthZero_Failure) {
-    uint8_t data[] = { 0x04, 0x00, 0x55, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    const uint8_t* string;
-    size_t length;
-    ASSERT_FALSE(asn1_octet_string_get(ctx, &string, &length));
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, OctetStringGet_LengthZero_Failure) {
+  uint8_t data[] = { 0x04, 0x00, 0x55 };
+  asn1_context ctx(data, sizeof(data));
+  const uint8_t* string;
+  size_t length;
+  ASSERT_FALSE(ctx.asn1_octet_string_get(&string, &length));
 }
 
-TEST_F(Asn1DecoderTest, OctetStringGet_TooSmall_Failure) {
-    uint8_t data[] = { 0x04, 0x01, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    const uint8_t* string;
-    size_t length;
-    ASSERT_FALSE(asn1_octet_string_get(ctx, &string, &length));
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, OctetStringGet_TooSmall_Failure) {
+  uint8_t data[] = { 0x04, 0x01 };
+  asn1_context ctx(data, sizeof(data));
+  const uint8_t* string;
+  size_t length;
+  ASSERT_FALSE(ctx.asn1_octet_string_get(&string, &length));
 }
 
-TEST_F(Asn1DecoderTest, OctetStringGet_Success) {
-    uint8_t data[] = { 0x04, 0x01, 0xAA, };
-    asn1_context_t* ctx = asn1_context_new(data, sizeof(data));
-    const uint8_t* string;
-    size_t length;
-    ASSERT_TRUE(asn1_octet_string_get(ctx, &string, &length));
-    EXPECT_EQ(1U, length);
-    EXPECT_EQ(0xAAU, *string);
-    asn1_context_free(ctx);
+TEST(Asn1DecoderTest, OctetStringGet_Success) {
+  uint8_t data[] = { 0x04, 0x01, 0xAA };
+  asn1_context ctx(data, sizeof(data));
+  const uint8_t* string;
+  size_t length;
+  ASSERT_TRUE(ctx.asn1_octet_string_get(&string, &length));
+  ASSERT_EQ(1U, length);
+  ASSERT_EQ(0xAAU, *string);
 }
-
-} // namespace android