diff --git a/boot/boot_serial/src/boot_serial.c b/boot/boot_serial/src/boot_serial.c
index c1d2a1e..7d15ce1 100644
--- a/boot/boot_serial/src/boot_serial.c
+++ b/boot/boot_serial/src/boot_serial.c
@@ -282,11 +282,11 @@
 
     if (off == 0) {
         curr_off = 0;
-        if (data_len > fap->fa_size) {
+        if (data_len > flash_area_get_size(fap)) {
             goto out_invalid_data;
         }
 #ifndef CONFIG_BOOT_ERASE_PROGRESSIVELY
-        rc = flash_area_erase(fap, 0, fap->fa_size);
+        rc = flash_area_erase(fap, 0, flash_area_get_size(fap));
         if (rc) {
             goto out_invalid_data;
         }
@@ -316,10 +316,11 @@
         BOOT_LOG_ERR("Unable to determine flash sector size");
         goto out;
     }
-    if (off_last != sector.fs_off) {
-        off_last = sector.fs_off;
-        BOOT_LOG_INF("Erasing sector at offset 0x%x", sector.fs_off);
-        rc = flash_area_erase(fap, sector.fs_off, sector.fs_size);
+    if (off_last != flash_sector_get_off(&sector)) {
+        off_last = flash_sector_get_off(&sector);
+        BOOT_LOG_INF("Erasing sector at offset 0x%x", flash_sector_get_off(&sector));
+        rc = flash_area_erase(fap, flash_sector_get_off(&sector),
+                              flash_sector_get_size(&sector));
         if (rc) {
             BOOT_LOG_ERR("Error %d while erasing sector", rc);
             goto out;
@@ -367,9 +368,11 @@
             }
             /* Assure that sector for image trailer was erased. */
             /* Check whether it was erased during previous upload. */
-            if (off_last < sector.fs_off) {
-                BOOT_LOG_INF("Erasing sector at offset 0x%x", sector.fs_off);
-                rc = flash_area_erase(fap, sector.fs_off, sector.fs_size);
+            if (off_last < flash_sector_get_off(&sector)) {
+                BOOT_LOG_INF("Erasing sector at offset 0x%x",
+                             flash_sector_get_off(&sector));
+                rc = flash_area_erase(fap, flash_sector_get_off(&sector),
+                                      flash_sector_get_size(&sector));
                 if (rc) {
                     BOOT_LOG_ERR("Error %d while erasing sector", rc);
                     goto out;
diff --git a/boot/bootutil/include/bootutil/image.h b/boot/bootutil/include/bootutil/image.h
index fc94915..15e4df3 100644
--- a/boot/bootutil/include/bootutil/image.h
+++ b/boot/bootutil/include/bootutil/image.h
@@ -152,7 +152,7 @@
 #define IS_ENCRYPTED(hdr) (((hdr)->ih_flags && IMAGE_F_ENCRYPTED_AES128) \
                         || ((hdr)->ih_flags && IMAGE_F_ENCRYPTED_AES256))
 #define MUST_DECRYPT(fap, idx, hdr) \
-    ((fap)->fa_id == FLASH_AREA_IMAGE_SECONDARY(idx) && IS_ENCRYPTED(hdr))
+    (flash_area_get_id(fap) == FLASH_AREA_IMAGE_SECONDARY(idx) && IS_ENCRYPTED(hdr))
 
 _Static_assert(sizeof(struct image_header) == IMAGE_HEADER_SIZE,
                "struct image_header not required size");
diff --git a/boot/bootutil/src/bootutil_misc.c b/boot/bootutil/src/bootutil_misc.c
index 9ee317f..e8cef25 100644
--- a/boot/bootutil/src/bootutil_misc.c
+++ b/boot/bootutil/src/bootutil_misc.c
@@ -123,12 +123,12 @@
 boot_status_entries(int image_index, const struct flash_area *fap)
 {
 #if MCUBOOT_SWAP_USING_SCRATCH
-    if (fap->fa_id == FLASH_AREA_IMAGE_SCRATCH) {
+    if (flash_area_get_id(fap) == FLASH_AREA_IMAGE_SCRATCH) {
         return BOOT_STATUS_STATE_COUNT;
     } else
 #endif
-    if (fap->fa_id == FLASH_AREA_IMAGE_PRIMARY(image_index) ||
-               fap->fa_id == FLASH_AREA_IMAGE_SECONDARY(image_index)) {
+    if (flash_area_get_id(fap) == FLASH_AREA_IMAGE_PRIMARY(image_index) ||
+        flash_area_get_id(fap) == FLASH_AREA_IMAGE_SECONDARY(image_index)) {
         return BOOT_STATUS_STATE_COUNT * BOOT_STATUS_MAX_ENTRIES;
     }
     return -1;
@@ -144,14 +144,14 @@
 
     off_from_end = boot_trailer_sz(elem_sz);
 
-    assert(off_from_end <= fap->fa_size);
-    return fap->fa_size - off_from_end;
+    assert(off_from_end <= flash_area_get_size(fap));
+    return flash_area_get_size(fap) - off_from_end;
 }
 
 static inline uint32_t
 boot_magic_off(const struct flash_area *fap)
 {
-    return fap->fa_size - BOOT_MAGIC_SZ;
+    return flash_area_get_size(fap) - BOOT_MAGIC_SZ;
 }
 
 static inline uint32_t
@@ -301,8 +301,8 @@
 
     off = boot_copy_done_off(fap);
     BOOT_LOG_DBG("writing copy_done; fa_id=%d off=0x%lx (0x%lx)",
-                 fap->fa_id, (unsigned long)off,
-                 (unsigned long)(fap->fa_off + off));
+                 flash_area_get_id(fap), (unsigned long)off,
+                 (unsigned long)(flash_area_get_off(fap) + off));
     return boot_write_trailer_flag(fap, off, BOOT_FLAG_SET);
 }
 
@@ -313,8 +313,8 @@
 
     off = boot_swap_size_off(fap);
     BOOT_LOG_DBG("writing swap_size; fa_id=%d off=0x%lx (0x%lx)",
-                 fap->fa_id, (unsigned long)off,
-                 (unsigned long)fap->fa_off + off);
+                 flash_area_get_id(fap), (unsigned long)off,
+                 (unsigned long)flash_area_get_off(fap) + off);
     return boot_write_trailer(fap, off, (const uint8_t *) &swap_size, 4);
 }
 
@@ -328,8 +328,8 @@
 
     off = boot_enc_key_off(fap, slot);
     BOOT_LOG_DBG("writing enc_key; fa_id=%d off=0x%lx (0x%lx)",
-                 fap->fa_id, (unsigned long)off,
-                 (unsigned long)fap->fa_off + off);
+                 flash_area_get_id(fap), (unsigned long)off,
+                 (unsigned long)flash_area_get_off(fap) + off);
 #if MCUBOOT_SWAP_SAVE_ENCTLV
     rc = flash_area_write(fap, off, bs->enctlv[slot], BOOT_ENC_TLV_ALIGN_SIZE);
 #else
diff --git a/boot/bootutil/src/bootutil_priv.h b/boot/bootutil/src/bootutil_priv.h
index f7ca5c9..c3807af 100644
--- a/boot/bootutil/src/bootutil_priv.h
+++ b/boot/bootutil/src/bootutil_priv.h
@@ -359,7 +359,7 @@
 static inline uint32_t
 boot_img_slot_off(struct boot_loader_state *state, size_t slot)
 {
-    return BOOT_IMG(state, slot).area->fa_off;
+    return flash_area_get_off(BOOT_IMG(state, slot).area);
 }
 
 #ifndef MCUBOOT_USE_FLASH_AREA_GET_SECTORS
@@ -368,7 +368,7 @@
 boot_img_sector_size(const struct boot_loader_state *state,
                      size_t slot, size_t sector)
 {
-    return BOOT_IMG(state, slot).sectors[sector].fa_size;
+    return flash_area_get_size(&BOOT_IMG(state, slot).sectors[sector]);
 }
 
 /*
@@ -379,8 +379,8 @@
 boot_img_sector_off(const struct boot_loader_state *state, size_t slot,
                     size_t sector)
 {
-    return BOOT_IMG(state, slot).sectors[sector].fa_off -
-           BOOT_IMG(state, slot).sectors[0].fa_off;
+    return flash_area_get_off(&BOOT_IMG(state, slot).sectors[sector]) -
+           flash_area_get_off(&BOOT_IMG(state, slot).sectors[0]);
 }
 
 #else  /* defined(MCUBOOT_USE_FLASH_AREA_GET_SECTORS) */
@@ -389,15 +389,15 @@
 boot_img_sector_size(const struct boot_loader_state *state,
                      size_t slot, size_t sector)
 {
-    return BOOT_IMG(state, slot).sectors[sector].fs_size;
+    return flash_sector_get_size(&BOOT_IMG(state, slot).sectors[sector]);
 }
 
 static inline uint32_t
 boot_img_sector_off(const struct boot_loader_state *state, size_t slot,
                     size_t sector)
 {
-    return BOOT_IMG(state, slot).sectors[sector].fs_off -
-           BOOT_IMG(state, slot).sectors[0].fs_off;
+    return flash_sector_get_off(&BOOT_IMG(state, slot).sectors[sector]) -
+           flash_sector_get_off(&BOOT_IMG(state, slot).sectors[0]);
 }
 
 #endif  /* !defined(MCUBOOT_USE_FLASH_AREA_GET_SECTORS) */
diff --git a/boot/bootutil/src/bootutil_public.c b/boot/bootutil/src/bootutil_public.c
index 726fc36..5cda14f 100644
--- a/boot/bootutil/src/bootutil_public.c
+++ b/boot/bootutil/src/bootutil_public.c
@@ -138,7 +138,7 @@
 static inline uint32_t
 boot_magic_off(const struct flash_area *fap)
 {
-    return fap->fa_size - BOOT_MAGIC_SZ;
+    return flash_area_get_size(fap) - BOOT_MAGIC_SZ;
 }
 
 static inline uint32_t
@@ -319,8 +319,8 @@
     off = boot_magic_off(fap);
 
     BOOT_LOG_DBG("writing magic; fa_id=%d off=0x%lx (0x%lx)",
-                 fap->fa_id, (unsigned long)off,
-                 (unsigned long)(fap->fa_off + off));
+                 flash_area_get_id(fap), (unsigned long)off,
+                 (unsigned long)(flash_area_get_off(fap) + off));
     rc = flash_area_write(fap, off, boot_img_magic, BOOT_MAGIC_SZ);
     if (rc != 0) {
         return BOOT_EFLASH;
@@ -376,8 +376,8 @@
 
     off = boot_image_ok_off(fap);
     BOOT_LOG_DBG("writing image_ok; fa_id=%d off=0x%lx (0x%lx)",
-                 fap->fa_id, (unsigned long)off,
-                 (unsigned long)(fap->fa_off + off));
+                 flash_area_get_id(fap), (unsigned long)off,
+                 (unsigned long)(flash_area_get_off(fap) + off));
     return boot_write_trailer_flag(fap, off, BOOT_FLAG_SET);
 }
 
@@ -403,8 +403,9 @@
     off = boot_swap_info_off(fap);
     BOOT_LOG_DBG("writing swap_info; fa_id=%d off=0x%lx (0x%lx), swap_type=0x%x"
                  " image_num=0x%x",
-                 fap->fa_id, (unsigned long)off,
-                 (unsigned long)(fap->fa_off + off), swap_type, image_num);
+                 flash_area_get_id(fap), (unsigned long)off,
+                 (unsigned long)(flash_area_get_off(fap) + off),
+                 swap_type, image_num);
     return boot_write_trailer(fap, off, (const uint8_t *) &swap_info, 1);
 }
 
@@ -537,7 +538,7 @@
         /* The image slot is corrupt.  There is no way to recover, so erase the
          * slot to allow future upgrades.
          */
-        flash_area_erase(fap, 0, fap->fa_size);
+        flash_area_erase(fap, 0, flash_area_get_size(fap));
         rc = BOOT_EBADIMAGE;
         break;
 
diff --git a/boot/bootutil/src/encrypted.c b/boot/bootutil/src/encrypted.c
index 278f51d..2ea1bef 100644
--- a/boot/bootutil/src/encrypted.c
+++ b/boot/bootutil/src/encrypted.c
@@ -663,7 +663,7 @@
     uint8_t slot;
     int rc;
 
-    rc = flash_area_id_to_multi_image_slot(image_index, fap->fa_id);
+    rc = flash_area_id_to_multi_image_slot(image_index, flash_area_get_id(fap));
     if (rc < 0) {
         return rc;
     }
@@ -710,7 +710,7 @@
 {
     int rc;
 
-    rc = flash_area_id_to_multi_image_slot(image_index, fap->fa_id);
+    rc = flash_area_id_to_multi_image_slot(image_index, flash_area_get_id(fap));
     if (rc < 0) {
         /* can't get proper slot number - skip encryption, */
         /* postpone the error for a upper layer */
@@ -742,7 +742,7 @@
     nonce[14] = (uint8_t)(off >> 8);
     nonce[15] = (uint8_t)off;
 
-    rc = flash_area_id_to_multi_image_slot(image_index, fap->fa_id);
+    rc = flash_area_id_to_multi_image_slot(image_index, flash_area_get_id(fap));
     if (rc < 0) {
         assert(0);
         return;
diff --git a/boot/bootutil/src/loader.c b/boot/bootutil/src/loader.c
index b0d3329..bacd581 100644
--- a/boot/bootutil/src/loader.c
+++ b/boot/bootutil/src/loader.c
@@ -188,7 +188,7 @@
     active_slot = BOOT_PRIMARY_SLOT;
 #endif
 
-    rsp->br_flash_dev_id = BOOT_IMG_AREA(state, active_slot)->fa_device_id;
+    rsp->br_flash_dev_id = flash_area_get_device_id(BOOT_IMG_AREA(state, active_slot));
     rsp->br_image_off = boot_img_slot_off(state, active_slot);
     rsp->br_hdr = boot_img_hdr(state, active_slot);
 }
@@ -559,7 +559,7 @@
         return false;
     }
 
-    if (size >= fap->fa_size) {
+    if (size >= flash_area_get_size(fap)) {
         return false;
     }
 
@@ -747,7 +747,7 @@
                 &boot_img_hdr(state, BOOT_PRIMARY_SLOT)->ih_ver);
         if (rc < 0 && boot_check_header_erased(state, BOOT_PRIMARY_SLOT)) {
             BOOT_LOG_ERR("insufficient version in secondary slot");
-            flash_area_erase(fap, 0, fap->fa_size);
+            flash_area_erase(fap, 0, flash_area_get_size(fap));
             /* Image in the secondary slot does not satisfy version requirement.
              * Erase the image and continue booting from the primary slot.
              */
@@ -760,7 +760,7 @@
     FIH_CALL(boot_image_check, fih_rc, state, hdr, fap, bs);
     if (!boot_is_header_valid(hdr, fap) || fih_not_eq(fih_rc, FIH_SUCCESS)) {
         if ((slot != BOOT_PRIMARY_SLOT) || ARE_SLOTS_EQUIVALENT()) {
-            flash_area_erase(fap, 0, fap->fa_size);
+            flash_area_erase(fap, 0, flash_area_get_size(fap));
             /* Image is invalid, erase it to prevent further unnecessary
              * attempts to validate and boot it.
              */
@@ -928,22 +928,22 @@
 
 #ifdef MCUBOOT_ENC_IMAGES
         image_index = BOOT_CURR_IMG(state);
-        if ((fap_src->fa_id == FLASH_AREA_IMAGE_SECONDARY(image_index) ||
-            fap_dst->fa_id == FLASH_AREA_IMAGE_SECONDARY(image_index)) &&
-            !(fap_src->fa_id == FLASH_AREA_IMAGE_SECONDARY(image_index) &&
-              fap_dst->fa_id == FLASH_AREA_IMAGE_SECONDARY(image_index))) {
+        if ((flash_area_get_id(fap_src) == FLASH_AREA_IMAGE_SECONDARY(image_index) ||
+             flash_area_get_id(fap_dst) == FLASH_AREA_IMAGE_SECONDARY(image_index)) &&
+            !(flash_area_get_id(fap_src) == FLASH_AREA_IMAGE_SECONDARY(image_index) &&
+              flash_area_get_id(fap_dst) == FLASH_AREA_IMAGE_SECONDARY(image_index))) {
             /* assume the secondary slot as src, needs decryption */
             hdr = boot_img_hdr(state, BOOT_SECONDARY_SLOT);
 #if !defined(MCUBOOT_SWAP_USING_MOVE)
             off = off_src;
-            if (fap_dst->fa_id == FLASH_AREA_IMAGE_SECONDARY(image_index)) {
+            if (flash_area_get_id(fap_dst) == FLASH_AREA_IMAGE_SECONDARY(image_index)) {
                 /* might need encryption (metadata from the primary slot) */
                 hdr = boot_img_hdr(state, BOOT_PRIMARY_SLOT);
                 off = off_dst;
             }
 #else
             off = off_dst;
-            if (fap_dst->fa_id == FLASH_AREA_IMAGE_SECONDARY(image_index)) {
+            if (flash_area_get_id(fap_dst) == FLASH_AREA_IMAGE_SECONDARY(image_index)) {
                 hdr = boot_img_hdr(state, BOOT_PRIMARY_SLOT);
             }
 #endif
@@ -2294,7 +2294,7 @@
          */
         BOOT_LOG_DBG("Erasing faulty image in the %s slot.",
                      (active_slot == BOOT_PRIMARY_SLOT) ? "primary" : "secondary");
-        rc = flash_area_erase(fap, 0, fap->fa_size);
+        rc = flash_area_erase(fap, 0, flash_area_get_size(fap));
         assert(rc == 0);
 
         flash_area_close(fap);
@@ -2612,7 +2612,7 @@
     area_id = flash_area_id_from_multi_image_slot(BOOT_CURR_IMG(state), slot);
     rc = flash_area_open(area_id, &fap);
     if (rc == 0) {
-        flash_area_erase(fap, 0, fap->fa_size);
+        flash_area_erase(fap, 0, flash_area_get_size(fap));
     }
 
     return rc;
diff --git a/boot/bootutil/src/swap_misc.c b/boot/bootutil/src/swap_misc.c
index 940d646..343e9fe 100644
--- a/boot/bootutil/src/swap_misc.c
+++ b/boot/bootutil/src/swap_misc.c
@@ -46,7 +46,7 @@
     uint8_t image_index;
     int rc;
 
-    BOOT_LOG_DBG("erasing trailer; fa_id=%d", fap->fa_id);
+    BOOT_LOG_DBG("erasing trailer; fa_id=%d", flash_area_get_id(fap));
 
     image_index = BOOT_CURR_IMG(state);
     fa_id_primary = flash_area_id_from_multi_image_slot(image_index,
@@ -54,9 +54,9 @@
     fa_id_secondary = flash_area_id_from_multi_image_slot(image_index,
             BOOT_SECONDARY_SLOT);
 
-    if (fap->fa_id == fa_id_primary) {
+    if (flash_area_get_id(fap) == fa_id_primary) {
         slot = BOOT_PRIMARY_SLOT;
-    } else if (fap->fa_id == fa_id_secondary) {
+    } else if (flash_area_get_id(fap) == fa_id_secondary) {
         slot = BOOT_SECONDARY_SLOT;
     } else {
         return BOOT_EFLASH;
@@ -94,7 +94,7 @@
 
     image_index = BOOT_CURR_IMG(state);
 
-    BOOT_LOG_DBG("initializing status; fa_id=%d", fap->fa_id);
+    BOOT_LOG_DBG("initializing status; fa_id=%d", flash_area_get_id(fap));
 
     rc = boot_read_swap_state_by_id(FLASH_AREA_IMAGE_SECONDARY(image_index),
             &swap_state);
diff --git a/boot/bootutil/src/swap_priv.h b/boot/bootutil/src/swap_priv.h
index 9cf5777..86d0b72 100644
--- a/boot/bootutil/src/swap_priv.h
+++ b/boot/bootutil/src/swap_priv.h
@@ -95,7 +95,7 @@
 
 static inline size_t boot_scratch_area_size(const struct boot_loader_state *state)
 {
-    return BOOT_SCRATCH_AREA(state)->fa_size;
+    return flash_area_get_size(BOOT_SCRATCH_AREA(state));
 }
 #endif
 
diff --git a/boot/bootutil/src/swap_scratch.c b/boot/bootutil/src/swap_scratch.c
index bbbe3b2..8c3686c 100644
--- a/boot/bootutil/src/swap_scratch.c
+++ b/boot/bootutil/src/swap_scratch.c
@@ -541,7 +541,7 @@
 
     if (bs->state == BOOT_STATUS_STATE_0) {
         BOOT_LOG_DBG("erasing scratch area");
-        rc = boot_erase_region(fap_scratch, 0, fap_scratch->fa_size);
+        rc = boot_erase_region(fap_scratch, 0, flash_area_get_size(fap_scratch));
         assert(rc == 0);
 
         if (bs->idx == BOOT_STATUS_IDX_0) {
@@ -564,7 +564,8 @@
                 assert(rc == 0);
 
                 /* Erase the temporary trailer from the scratch area. */
-                rc = boot_erase_region(fap_scratch, 0, fap_scratch->fa_size);
+                rc = boot_erase_region(fap_scratch, 0,
+                        flash_area_get_size(fap_scratch));
                 assert(rc == 0);
             }
         }