1 files changed, 186 insertions, 0 deletions
diff --git a/testsuites/unit/tc-base64-decode.c b/testsuites/unit/tc-base64-decode.c
new file mode 100644
index 0000000000..4b0672d310
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+++ b/testsuites/unit/tc-base64-decode.c
@@ -0,0 +1,186 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup TestsuitesUnitNoClock0
+ */
+
+/*
+ * Copyright (C) 2023 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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 <rtems/base64.h>
+
+#include <rtems/test.h>
+
+typedef struct {
+  Base64_Decode_control base;
+  uint8_t buf[64];
+} test_control;
+
+static int test_run(test_control* self, const char* payload) {
+  size_t len = strlen(payload);
+
+  for (size_t i = 0; i < len; ++i) {
+    int rv = _Base64_Decode(&self->base, payload[i]);
+
+    if (rv != 0) {
+      return rv;
+    }
+  }
+
+  return 0;
+}
+
+static int test_payload(test_control* self, const char* payload) {
+  memset(self->buf, 0xff, sizeof(self->buf));
+  _Base64_Decode_initialize(&self->base, &self->buf[0], sizeof(self->buf));
+  return test_run(self, payload);
+}
+
+T_TEST_CASE(IOBase64Decode) {
+  int rv;
+  test_control instance;
+  test_control* self = &instance;
+
+  rv = test_payload(self, "POOL");
+  T_eq_int(rv, BASE64_DECODE_SUCCESS);
+  T_eq_int(self->base.state, BASE64_DECODE_STATE_0);
+  T_eq_ptr(self->base.target, &self->buf[3]);
+  const uint8_t expected1[] = {0x3c, 0xe3, 0x8b, 0xff};
+  T_eq_mem(&self->buf[0], expected1, sizeof(expected1));
+
+  rv = test_payload(self, "ABCDEFGH");
+  T_eq_int(rv, BASE64_DECODE_SUCCESS);
+  T_eq_int(self->base.state, BASE64_DECODE_STATE_0);
+  T_eq_ptr(self->base.target, &self->buf[6]);
+  const uint8_t expected2[] = {0x00, 0x10, 0x83, 0x10, 0x51, 0x87, 0xff};
+  T_eq_mem(&self->buf[0], expected2, sizeof(expected2));
+
+  /* Non-base64 character results in an error */
+  rv = test_payload(self, "PO*OL");
+  T_eq_int(rv, BASE64_DECODE_INVALID_INPUT);
+  T_eq_int(self->base.state, BASE64_DECODE_STATE_2);
+  T_eq_ptr(self->base.target, &self->buf[1]);
+  const uint8_t expected3[] = {0x3c};
+  T_eq_mem(&self->buf[0], expected3, sizeof(expected3));
+
+  /* Other non-base64 character results in an error */
+  rv = test_payload(self, "PO\x80OL");
+  T_eq_int(rv, BASE64_DECODE_INVALID_INPUT);
+  T_eq_int(self->base.state, BASE64_DECODE_STATE_2);
+  T_eq_ptr(self->base.target, &self->buf[1]);
+  T_eq_mem(&self->buf[0], expected3, sizeof(expected3));
+
+  /* Space characters should be ignored */
+  rv = test_payload(self, "P OOL");
+  T_eq_int(rv, BASE64_DECODE_SUCCESS);
+  T_eq_int(self->base.state, BASE64_DECODE_STATE_0);
+  T_eq_ptr(self->base.target, &self->buf[3]);
+  const uint8_t expected4[] = {0x3c, 0xe3, 0x8b, 0xff};
+  T_eq_mem(&self->buf[0], expected4, sizeof(expected4));
+
+  /* Handle pad characters */
+  rv = test_payload(self, "POOL==");
+  T_eq_int(rv, BASE64_DECODE_SUCCESS);
+  T_eq_int(self->base.state, BASE64_DECODE_STATE_0);
+  T_eq_ptr(self->base.target, &self->buf[3]);
+  T_eq_ptr(self->base.target, self->base.target_end);
+  const uint8_t expected5[] = {0x3c, 0xe3, 0x8b, 0xff};
+  T_eq_mem(&self->buf[0], expected5, sizeof(expected5));
+
+  /* If characters come after pad characters, an error results */
+  rv = test_payload(self, "POOL==xy");
+  T_eq_int(rv, BASE64_DECODE_OVERFLOW);
+  T_eq_int(self->base.state, BASE64_DECODE_SUCCESS);
+  T_eq_ptr(self->base.target, &self->buf[3]);
+  T_eq_ptr(self->base.target, self->base.target_end);
+  const uint8_t expected6[] = {0x3c, 0xe3, 0x8b, 0xff};
+  T_eq_mem(&self->buf[0], expected6, sizeof(expected6));
+
+  rv = test_payload(self, "POOLPOOL");
+  T_eq_int(rv, BASE64_DECODE_SUCCESS);
+  T_eq_int(self->base.state, BASE64_DECODE_STATE_0);
+  T_eq_ptr(self->base.target, &self->buf[6]);
+  const uint8_t expected7[] = {0x3c, 0xe3, 0x8b, 0x3c, 0xe3, 0x8b, 0xff};
+  T_eq_mem(&self->buf[0], expected7, sizeof(expected7));
+
+  /*
+   * Test valid payload with series of target sizes. All target sizes
+   * less than three are invalid for the given payload and will result
+   * in an error.
+   */
+  const uint8_t expected9[] = {0x3c, 0xe3, 0x8b, 0xff};
+
+  for (size_t i = 0; i < 4; ++i) {
+    memset(&self->buf[0], 0xff, sizeof(self->buf));
+    _Base64_Decode_initialize(&self->base, &self->buf[0], i);
+    rv = test_run(self, "POOL");
+
+    if (i < 3) {
+      T_eq_int(rv, BASE64_DECODE_OVERFLOW);
+      T_eq_int(self->base.state, i);
+      T_ne_ptr(self->base.target, &self->buf[3]);
+      T_ne_mem(&self->buf[0], expected9, sizeof(expected9));
+    } else {
+      T_eq_int(rv, BASE64_DECODE_SUCCESS);
+      T_eq_int(self->base.state, BASE64_DECODE_STATE_0);
+      T_eq_ptr(self->base.target, &self->buf[3]);
+      T_eq_mem(&self->buf[0], expected9, sizeof(expected9));
+    }
+  }
+
+  /* No overflow in state 1 */
+  memset(&self->buf[0], 0xff, sizeof(self->buf));
+  _Base64_Decode_initialize(&self->base, &self->buf[0], 1);
+  rv = test_run(self, "AA");
+  T_eq_int(rv, BASE64_DECODE_SUCCESS);
+  T_eq_int(self->base.state, BASE64_DECODE_STATE_2);
+  T_eq_ptr(self->base.target, &self->buf[1]);
+  const uint8_t expected10[] = {0x00, 0xff};
+  T_eq_mem(&self->buf[0], expected10, sizeof(expected10));
+
+  /* No overflow in state 2 */
+  memset(&self->buf[0], 0xff, sizeof(self->buf));
+  _Base64_Decode_initialize(&self->base, &self->buf[0], 2);
+  rv = test_run(self, "AAA");
+  T_eq_int(rv, BASE64_DECODE_SUCCESS);
+  T_eq_int(self->base.state, BASE64_DECODE_STATE_3);
+  T_eq_ptr(self->base.target, &self->buf[2]);
+  const uint8_t expected11[] = {0x00, 0x00, 0xff};
+  T_eq_mem(&self->buf[0], expected11, sizeof(expected11));
+}
+
+T_TEST_CASE(IOBase64DecodeInitialize) {
+  Base64_Decode_control instance;
+  Base64_Decode_control* self = &instance;
+  uint8_t buf[1];
+
+  memset(self, 0xff, sizeof(*self));
+  _Base64_Decode_initialize(self, buf, sizeof(buf));
+  T_eq_int(self->state, BASE64_DECODE_STATE_0);
+  T_eq_ptr(self->target, &buf[0]);
+  T_eq_ptr(self->target_end, &buf[1]);
+}