nuttx/drivers/crypto/pnt/0003-Added-Se05x_API_ReadSize-to-API.patch

From b88625c69a26cfc178cad2e1430d53c8f01be6b0 Mon Sep 17 00:00:00 2001
From: Andre Heinemans <andre.heinemans@nxp.com>
Date: Fri, 11 Nov 2022 13:20:53 +0100
Subject: [PATCH 3/4] Added Se05x_API_ReadSize to API

---
 lib/apdu/se05x_APDU_apis.h | 71 ++++++++++++++++++++++++++++++++++++++
 lib/apdu/se05x_APDU_impl.c | 39 +++++++++++++++++++++
 lib/apdu/se05x_tlv.c       | 26 ++++++++++++++
 lib/apdu/se05x_tlv.h       |  1 +
 4 files changed, 137 insertions(+)

diff --git a/lib/apdu/se05x_APDU_apis.h b/lib/apdu/se05x_APDU_apis.h
index 38cf017..7865c93 100644
--- a/lib/apdu/se05x_APDU_apis.h
+++ b/lib/apdu/se05x_APDU_apis.h
@@ -113,6 +113,77 @@ smStatus_t Se05x_API_WriteECKey(pSe05xSession_t session_ctx,
     const SE05x_INS_t ins_type,
     const SE05x_KeyPart_t key_part);
 
+/** Se05x_API_ReadSize
+ *
+ * ReadSize
+ *
+ * Get the size of a Secure Object (in bytes):
+ *
+ *   * For EC keys: the size of the curve is returned.
+ *
+ *   * For RSA keys: the key size is returned.
+ *
+ *   * For AES/DES/HMAC keys, the key size is returned.
+ *
+ *   * For binary files: the file size is returned
+ *
+ *   * For userIDs: nothing is returned (SW_CONDITIONS_NOT_SATISFIED).
+ *
+ *   * For counters: the counter length is returned.
+ *
+ *   * For PCR: the PCR length is returned.
+ *
+ * # Command to Applet
+ *
+ * @rst
+ * +-------+------------+-----------------------------+
+ * | Field | Value      | Description                 |
+ * +=======+============+=============================+
+ * | CLA   | 0x80       |                             |
+ * +-------+------------+-----------------------------+
+ * | INS   | INS_READ   | See :cpp:type:`SE05x_INS_t` |
+ * +-------+------------+-----------------------------+
+ * | P1    | P1_DEFAULT | See :cpp:type:`SE05x_P1_t`  |
+ * +-------+------------+-----------------------------+
+ * | P2    | P2_SIZE    | See :cpp:type:`SE05x_P2_t`  |
+ * +-------+------------+-----------------------------+
+ * | Lc    | #(Payload) |                             |
+ * +-------+------------+-----------------------------+
+ * |       | TLV[TAG_1] | 4-byte object identifier.   |
+ * +-------+------------+-----------------------------+
+ * | Le    | 0x00       |                             |
+ * +-------+------------+-----------------------------+
+ * @endrst
+ *
+ * # R-APDU Body
+ *
+ * @rst
+ * +------------+-----------------------------+
+ * | Value      | Description                 |
+ * +============+=============================+
+ * | TLV[TAG_1] | Byte array containing size. |
+ * +------------+-----------------------------+
+ * @endrst
+ *
+ * # R-APDU Trailer
+ *
+ * @rst
+ * +-------------+--------------------------------+
+ * | SW          | Description                    |
+ * +=============+================================+
+ * | SW_NO_ERROR | Data is returned successfully. |
+ * +-------------+--------------------------------+
+ * @endrst
+ *
+ *
+ * @param[in]  session_ctx  The session context
+ * @param[in]  objectID     The object id
+ * @param      psize        The psize
+ *
+ * @return     The sm status.
+ */
+smStatus_t Se05x_API_ReadSize(pSe05xSession_t session_ctx, uint32_t objectID, uint16_t *psize);
+
 /** Se05x_API_ReadObject
  *
  * Reads the content of a Secure Object.
diff --git a/lib/apdu/se05x_APDU_impl.c b/lib/apdu/se05x_APDU_impl.c
index 4acfad7..86b0d8f 100644
--- a/lib/apdu/se05x_APDU_impl.c
+++ b/lib/apdu/se05x_APDU_impl.c
@@ -186,6 +186,45 @@ cleanup:
     return retStatus;
 }
 
+smStatus_t Se05x_API_ReadSize(pSe05xSession_t session_ctx, uint32_t objectID, uint16_t *psize)
+{
+    smStatus_t retStatus = SM_NOT_OK;
+    tlvHeader_t hdr      = {{kSE05x_CLA, kSE05x_INS_READ, kSE05x_P1_DEFAULT, kSE05x_P2_SIZE}};
+    size_t cmdbufLen     = 0;
+    uint8_t *pCmdbuf     = NULL;
+    int tlvRet           = 0;
+    uint8_t *pRspbuf     = NULL;
+    size_t rspbufLen     = 0;
+
+    ENSURE_OR_GO_CLEANUP(session_ctx != NULL);
+
+    pCmdbuf   = &session_ctx->apdu_buffer[0];
+    pRspbuf   = &session_ctx->apdu_buffer[0];
+    rspbufLen = sizeof(session_ctx->apdu_buffer);
+
+    SMLOG_D("APDU - ReadSize [] \n");
+
+    tlvRet = TLVSET_U32("object id", &pCmdbuf, &cmdbufLen, kSE05x_TAG_1, objectID);
+    if (0 != tlvRet) {
+        goto cleanup;
+    }
+    retStatus = DoAPDUTxRx(session_ctx, &hdr, session_ctx->apdu_buffer, cmdbufLen, pRspbuf, &rspbufLen, 1);
+    if (retStatus == SM_OK) {
+        retStatus       = SM_NOT_OK;
+        size_t rspIndex = 0;
+        tlvRet          = tlvGet_U16(pRspbuf, &rspIndex, rspbufLen, kSE05x_TAG_1, psize); /* - */
+        if (0 != tlvRet) {
+            goto cleanup;
+        }
+        if ((rspIndex + 2) == rspbufLen) {
+            retStatus = (smStatus_t)((pRspbuf[rspIndex] << 8) | (pRspbuf[rspIndex + 1]));
+        }
+    }
+
+cleanup:
+    return retStatus;
+}
+
 smStatus_t Se05x_API_ReadObject(
     pSe05xSession_t session_ctx, uint32_t objectID, uint16_t offset, uint16_t length, uint8_t *data, size_t *pdataLen)
 {
diff --git a/lib/apdu/se05x_tlv.c b/lib/apdu/se05x_tlv.c
index 4ed996e..71d253a 100644
--- a/lib/apdu/se05x_tlv.c
+++ b/lib/apdu/se05x_tlv.c
@@ -252,6 +252,32 @@ cleanup:
     return retVal;
 }
 
+int tlvGet_U16(uint8_t *buf, size_t *pBufIndex, const size_t bufLen, SE05x_TAG_t tag, uint16_t *pRsp)
+{
+    int retVal      = 1;
+    uint8_t *pBuf   = buf + (*pBufIndex);
+    uint8_t got_tag = *pBuf++;
+    size_t rspLen;
+
+    if ((*pBufIndex) > bufLen) {
+        goto cleanup;
+    }
+
+    if (got_tag != tag) {
+        goto cleanup;
+    }
+    rspLen = *pBuf++;
+    if (rspLen > 2) {
+        goto cleanup;
+    }
+    *pRsp = (*pBuf++) << 8;
+    *pRsp |= *pBuf++;
+    *pBufIndex += (1 + 1 + (rspLen));
+    retVal = 0;
+cleanup:
+    return retVal;
+}
+
 int tlvGet_u8buf(uint8_t *buf, size_t *pBufIndex, const size_t bufLen, SE05x_TAG_t tag, uint8_t *rsp, size_t *pRspLen)
 {
     int retVal      = 1;
diff --git a/lib/apdu/se05x_tlv.h b/lib/apdu/se05x_tlv.h
index 2fda3e7..ea7bfdf 100644
--- a/lib/apdu/se05x_tlv.h
+++ b/lib/apdu/se05x_tlv.h
@@ -34,6 +34,7 @@ int tlvSet_ECCurve(uint8_t **buf, size_t *bufLen, SE05x_TAG_t tag, SE05x_ECCurve
 int tlvSet_KeyID(uint8_t **buf, size_t *bufLen, SE05x_TAG_t tag, uint32_t keyID);
 int tlvSet_header(uint8_t **buf, size_t *bufLen, tlvHeader_t *hdr);
 int tlvGet_U8(uint8_t *buf, size_t *pBufIndex, const size_t bufLen, SE05x_TAG_t tag, uint8_t *pRsp);
+int tlvGet_U16(uint8_t *buf, size_t *pBufIndex, const size_t bufLen, SE05x_TAG_t tag, uint16_t *pRsp);
 int tlvGet_u8buf(uint8_t *buf, size_t *pBufIndex, const size_t bufLen, SE05x_TAG_t tag, uint8_t *rsp, size_t *pRspLen);
 int tlvGet_Result(uint8_t *buf, size_t *pBufIndex, size_t bufLen, SE05x_TAG_t tag, SE05x_Result_t *presult);
 smStatus_t DoAPDUTx(
-- 
2.25.1