diff --git a/test/lib/test_sha256_hmac.c b/test/lib/test_sha256_hmac.c
new file mode 100644
index 0000000..5279dd7
--- /dev/null
+++ b/test/lib/test_sha256_hmac.c
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2024 Philippe Reynes <philippe.reynes@softathome.com>
+ *
+ * Unit tests for sha256_hmac functions
+ */
+
+#include <command.h>
+#include <test/lib.h>
+#include <test/test.h>
+#include <test/ut.h>
+#include <u-boot/sha256.h>
+
+struct test_sha256_hmac_s {
+	const unsigned char *key;
+	int keylen;
+	const unsigned char *input;
+	int ilen;
+	const unsigned char *expected;
+	int elen;
+};
+
+/*
+ * data comes from:
+ * https://datatracker.ietf.org/doc/html/rfc4231
+ */
+static unsigned char key_test1[] = {
+	0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+	0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b };
+
+static unsigned char input_test1[] = {
+	0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65 };
+
+static unsigned char expected_test1[] = {
+	0xb0, 0x34, 0x4c, 0x61, 0xd8, 0xdb, 0x38, 0x53,
+	0x5c, 0xa8, 0xaf, 0xce, 0xaf, 0x0b, 0xf1, 0x2b,
+	0x88, 0x1d, 0xc2, 0x00, 0xc9, 0x83, 0x3d, 0xa7,
+	0x26, 0xe9, 0x37, 0x6c, 0x2e, 0x32, 0xcf, 0xf7 };
+
+static unsigned char key_test2[] = { 0x4a, 0x65, 0x66, 0x65 };
+
+static unsigned char input_test2[] = {
+	0x77, 0x68, 0x61, 0x74, 0x20, 0x64, 0x6f, 0x20,
+	0x79, 0x61, 0x20, 0x77, 0x61, 0x6e, 0x74, 0x20,
+	0x66, 0x6f, 0x72, 0x20, 0x6e, 0x6f, 0x74, 0x68,
+	0x69, 0x6e, 0x67, 0x3f };
+
+static unsigned char expected_test2[] = {
+	0x5b, 0xdc, 0xc1, 0x46, 0xbf, 0x60, 0x75, 0x4e,
+	0x6a, 0x04, 0x24, 0x26, 0x08, 0x95, 0x75, 0xc7,
+	0x5a, 0x00, 0x3f, 0x08, 0x9d, 0x27, 0x39, 0x83,
+	0x9d, 0xec, 0x58, 0xb9, 0x64, 0xec, 0x38, 0x43 };
+
+static unsigned char key_test3[] = {
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa };
+
+static unsigned char input_test3[] = {
+	0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
+	0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
+	0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
+	0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
+	0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
+	0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
+	0xdd, 0xdd };
+
+static unsigned char expected_test3[] = {
+	0x77, 0x3e, 0xa9, 0x1e, 0x36, 0x80, 0x0e, 0x46,
+	0x85, 0x4d, 0xb8, 0xeb, 0xd0, 0x91, 0x81, 0xa7,
+	0x29, 0x59, 0x09, 0x8b, 0x3e, 0xf8, 0xc1, 0x22,
+	0xd9, 0x63, 0x55, 0x14, 0xce, 0xd5, 0x65, 0xfe };
+
+static unsigned char key_test4[] = {
+	0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+	0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+	0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
+	0x19,
+};
+
+static unsigned char input_test4[] = {
+	0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
+	0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
+	0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
+	0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
+	0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
+	0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
+	0xcd, 0xcd,
+};
+
+static unsigned char expected_test4[] = {
+	0x82, 0x55, 0x8a, 0x38, 0x9a, 0x44, 0x3c, 0x0e,
+	0xa4, 0xcc, 0x81, 0x98, 0x99, 0xf2, 0x08, 0x3a,
+	0x85, 0xf0, 0xfa, 0xa3, 0xe5, 0x78, 0xf8, 0x07,
+	0x7a, 0x2e, 0x3f, 0xf4, 0x67, 0x29, 0x66, 0x5b,
+};
+
+static unsigned char key_test5[] = {
+	0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
+	0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
+	0x0c, 0x0c, 0x0c, 0x0c,
+};
+
+static unsigned char input_test5[] = {
+	0x54, 0x65, 0x73, 0x74, 0x20, 0x57, 0x69, 0x74,
+	0x68, 0x20, 0x54, 0x72, 0x75, 0x6e, 0x63, 0x61,
+	0x74, 0x69, 0x6f, 0x6e,
+};
+
+static unsigned char expected_test5[] = {
+	0xa3, 0xb6, 0x16, 0x74, 0x73, 0x10, 0x0e, 0xe0,
+	0x6e, 0x0c, 0x79, 0x6c, 0x29, 0x55, 0x55, 0x2b,
+};
+
+static unsigned char key_test6[] = {
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa };
+
+static unsigned char input_test6[] = {
+	0x54, 0x65, 0x73, 0x74, 0x20, 0x55, 0x73, 0x69,
+	0x6e, 0x67, 0x20, 0x4c, 0x61, 0x72, 0x67, 0x65,
+	0x72, 0x20, 0x54, 0x68, 0x61, 0x6e, 0x20, 0x42,
+	0x6c, 0x6f, 0x63, 0x6b, 0x2d, 0x53, 0x69, 0x7a,
+	0x65, 0x20, 0x4b, 0x65, 0x79, 0x20, 0x2d, 0x20,
+	0x48, 0x61, 0x73, 0x68, 0x20, 0x4b, 0x65, 0x79,
+	0x20, 0x46, 0x69, 0x72, 0x73, 0x74 };
+
+static unsigned char expected_test6[] = {
+	0x60, 0xe4, 0x31, 0x59, 0x1e, 0xe0, 0xb6, 0x7f,
+	0x0d, 0x8a, 0x26, 0xaa, 0xcb, 0xf5, 0xb7, 0x7f,
+	0x8e, 0x0b, 0xc6, 0x21, 0x37, 0x28, 0xc5, 0x14,
+	0x05, 0x46, 0x04, 0x0f, 0x0e, 0xe3, 0x7f, 0x54 };
+
+static unsigned char key_test7[] = {
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+	0xaa, 0xaa, 0xaa,
+};
+
+static unsigned char input_test7[] = {
+	0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20,
+	0x61, 0x20, 0x74, 0x65, 0x73, 0x74, 0x20, 0x75,
+	0x73, 0x69, 0x6e, 0x67, 0x20, 0x61, 0x20, 0x6c,
+	0x61, 0x72, 0x67, 0x65, 0x72, 0x20, 0x74, 0x68,
+	0x61, 0x6e, 0x20, 0x62, 0x6c, 0x6f, 0x63, 0x6b,
+	0x2d, 0x73, 0x69, 0x7a, 0x65, 0x20, 0x6b, 0x65,
+	0x79, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x61, 0x20,
+	0x6c, 0x61, 0x72, 0x67, 0x65, 0x72, 0x20, 0x74,
+	0x68, 0x61, 0x6e, 0x20, 0x62, 0x6c, 0x6f, 0x63,
+	0x6b, 0x2d, 0x73, 0x69, 0x7a, 0x65, 0x20, 0x64,
+	0x61, 0x74, 0x61, 0x2e, 0x20, 0x54, 0x68, 0x65,
+	0x20, 0x6b, 0x65, 0x79, 0x20, 0x6e, 0x65, 0x65,
+	0x64, 0x73, 0x20, 0x74, 0x6f, 0x20, 0x62, 0x65,
+	0x20, 0x68, 0x61, 0x73, 0x68, 0x65, 0x64, 0x20,
+	0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x20, 0x62,
+	0x65, 0x69, 0x6e, 0x67, 0x20, 0x75, 0x73, 0x65,
+	0x64, 0x20, 0x62, 0x79, 0x20, 0x74, 0x68, 0x65,
+	0x20, 0x48, 0x4d, 0x41, 0x43, 0x20, 0x61, 0x6c,
+	0x67, 0x6f, 0x72, 0x69, 0x74, 0x68, 0x6d, 0x2e,
+};
+
+static unsigned char expected_test7[] = {
+	0x9b, 0x09, 0xff, 0xa7, 0x1b, 0x94, 0x2f, 0xcb,
+	0x27, 0x63, 0x5f, 0xbc, 0xd5, 0xb0, 0xe9, 0x44,
+	0xbf, 0xdc, 0x63, 0x64, 0x4f, 0x07, 0x13, 0x93,
+	0x8a, 0x7f, 0x51, 0x53, 0x5c, 0x3a, 0x35, 0xe2,
+};
+
+static struct test_sha256_hmac_s test_sha256_hmac[] = {
+	{
+		.key = key_test1,
+		.keylen = sizeof(key_test1),
+		.input = input_test1,
+		.ilen = sizeof(input_test1),
+		.expected = expected_test1,
+		.elen = sizeof(expected_test1),
+	},
+	{
+		.key = key_test2,
+		.keylen = sizeof(key_test2),
+		.input = input_test2,
+		.ilen = sizeof(input_test2),
+		.expected = expected_test2,
+		.elen = sizeof(expected_test2),
+	},
+	{
+		.key = key_test3,
+		.keylen = sizeof(key_test3),
+		.input = input_test3,
+		.ilen = sizeof(input_test3),
+		.expected = expected_test3,
+		.elen = sizeof(expected_test3),
+	},
+	{
+		.key = key_test4,
+		.keylen = sizeof(key_test4),
+		.input = input_test4,
+		.ilen = sizeof(input_test4),
+		.expected = expected_test4,
+		.elen = sizeof(expected_test4),
+	},
+	{
+		.key = key_test5,
+		.keylen = sizeof(key_test5),
+		.input = input_test5,
+		.ilen = sizeof(input_test5),
+		.expected = expected_test5,
+		.elen = sizeof(expected_test5),
+	},
+	{
+		.key = key_test6,
+		.keylen = sizeof(key_test6),
+		.input = input_test6,
+		.ilen = sizeof(input_test6),
+		.expected = expected_test6,
+		.elen = sizeof(expected_test6),
+	},
+	{
+		.key = key_test7,
+		.keylen = sizeof(key_test7),
+		.input = input_test7,
+		.ilen = sizeof(input_test7),
+		.expected = expected_test7,
+		.elen = sizeof(expected_test7),
+	},
+};
+
+static int _lib_test_sha256_hmac_run(struct unit_test_state *uts,
+				     const unsigned char *key, int keylen,
+				     const unsigned char *input, int ilen,
+				     const unsigned char *expected, int elen)
+{
+	unsigned char output[SHA256_SUM_LEN];
+	int ret;
+
+	ut_assert(elen <= sizeof(output));
+	ret = sha256_hmac(key, keylen, input, ilen, output);
+	ut_assert(!ret);
+	ut_asserteq_mem(expected, output, elen);
+
+	return 0;
+}
+
+static int lib_test_sha256_hmac_run(struct unit_test_state *uts,
+				    struct test_sha256_hmac_s *test)
+{
+	return _lib_test_sha256_hmac_run(uts, test->key, test->keylen,
+					 test->input, test->ilen,
+					 test->expected, test->elen);
+}
+
+static int lib_test_sha256_hmac(struct unit_test_state *uts)
+{
+	int i, ret = 0;
+
+	for (i = 0; i < ARRAY_SIZE(test_sha256_hmac); i++) {
+		ret = lib_test_sha256_hmac_run(uts, &test_sha256_hmac[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+LIB_TEST(lib_test_sha256_hmac, 0);