From 985abb5eae9fea9316364300349767a15fb92856 Mon Sep 17 00:00:00 2001
From: David Garske <david@wolfssl.com>
Date: Tue, 6 May 2025 16:52:28 -0700
Subject: [PATCH] Updated docs. Add test case for `TPM2_GetAlgId`.

---
 examples/u-boot/README.md | 28 ++++++++++++++++++++++++----
 tests/unit_tests.c        |  7 +++++++
 2 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/examples/u-boot/README.md b/examples/u-boot/README.md
index 47350fd..c9597b6 100644
--- a/examples/u-boot/README.md
+++ b/examples/u-boot/README.md
@@ -121,12 +121,32 @@ No USB controllers found
 Net:   eth0: virtio-net#32
 
 Hit any key to stop autoboot:  0
-=> tpm help
-tpm - Issue a TPMv1.x command
+=> tpm2 help
+tpm2 - Issue a TPMv2.x command
 
 Usage:
-tpm cmd args...
+tpm2 <command> [<arguments>]
+
+device [num device]
+    Show all devices or set the specified device
+info
+    Show information about the TPM.
 ```
 
-7. Exiting the QEMU:
+7. Example commands:
+
+```
+=> tpm2 info
+tpm_tis@0 v2.0: VendorID 0x1014, DeviceID 0x0001, RevisionID 0x01 [open]
+=> tpm2 startup TPM2_SU_CLEAR
+=> tpm2 get_capability 0x6 0x20e 0x200 1
+Capabilities read from TPM:
+Property 0x6a2e45a9: 0x6c3646a9
+=> tpm2 pcr_read 10 0x100000
+PCR #10 sha256 32 byte content (20 known updates):
+ 20 25 73 0a 00 56 61 6c 75 65 3a 0a 00 23 23 20
+ 4f 75 74 20 6f 66 20 6d 65 6d 6f 72 79 0a 00 23
+```
+
+8. Exiting the QEMU:
 Press Ctrl-A followed by X
diff --git a/tests/unit_tests.c b/tests/unit_tests.c
index 948ea15..99e9b31 100644
--- a/tests/unit_tests.c
+++ b/tests/unit_tests.c
@@ -357,6 +357,12 @@ static void test_TPM2_KDFa(void)
         rc >= 0 ? "Passed" : "Failed");
 }
 
+static void test_GetAlgId(void)
+{
+    TPM_ALG_ID alg = TPM2_GetAlgId("SHA256");
+    AssertIntEQ(alg, TPM_ALG_SHA256);
+}
+
 static void test_wolfTPM2_CSR(void)
 {
 #if defined(WOLFTPM2_CERT_GEN) && !defined(WOLFTPM2_NO_HEAP) && \
@@ -663,6 +669,7 @@ int unit_tests(int argc, char *argv[])
     test_wolfTPM2_GetRandom();
     test_TPM2_PCRSel();
     test_TPM2_KDFa();
+    test_GetAlgId();
     test_wolfTPM2_ReadPublicKey();
     test_wolfTPM2_CSR();
     #if !defined(WOLFTPM2_NO_WOLFCRYPT) && defined(WOLFTPM2_PEM_DECODE) && \