esphome:
  on_boot:
    - lambda: |-
        // Test SHA256 functionality
        #ifdef USE_SHA256
        using esphome::sha256::SHA256;
        SHA256 hasher;
        hasher.init();

        // Test with "Hello World" - known SHA256
        const char* test_string = "Hello World";
        hasher.add(test_string, strlen(test_string));
        hasher.calculate();

        char hex_output[65];
        hasher.get_hex(hex_output);
        hex_output[64] = '\0';

        ESP_LOGD("SHA256", "SHA256('Hello World') = %s", hex_output);

        // Expected: a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e
        const char* expected = "a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e";
        if (strcmp(hex_output, expected) == 0) {
          ESP_LOGI("SHA256", "Test PASSED");
        } else {
          ESP_LOGE("SHA256", "Test FAILED. Expected %s", expected);
        }
        #else
        ESP_LOGW("SHA256", "SHA256 not available on this platform");
        #endif

sha256: