Merge tag 'tpm-master-27052024' of https://source.denx.de/u-boot/cust…

…odians/u-boot-tpm

TPM fixes

cmd/tpm-v2.c

@@ -99,11 +99,19 @@ static int do_tpm2_pcr_extend(struct cmd_tbl *cmdtp, int flag, int argc,
 	struct tpm_chip_priv *priv;
 	u32 index = simple_strtoul(argv[1], NULL, 0);
 	void *digest = map_sysmem(simple_strtoul(argv[2], NULL, 0), 0);
+	int algo = TPM2_ALG_SHA256;
+	int algo_len;
 	int ret;
 	u32 rc;
 
-	if (argc != 3)
+	if (argc < 3 || argc > 4)
 		return CMD_RET_USAGE;
+	if (argc == 4) {
+		algo = tpm2_name_to_algorithm(argv[3]);
+		if (algo < 0)
+			return CMD_RET_FAILURE;
+	}
+	algo_len = tpm2_algorithm_to_len(algo);
 
 	ret = get_tpm(&dev);
 	if (ret)
@@ -116,8 +124,12 @@ static int do_tpm2_pcr_extend(struct cmd_tbl *cmdtp, int flag, int argc,
 	if (index >= priv->pcr_count)
 		return -EINVAL;
 
-	rc = tpm2_pcr_extend(dev, index, TPM2_ALG_SHA256, digest,
-			     TPM2_DIGEST_LEN);
+	rc = tpm2_pcr_extend(dev, index, algo, digest, algo_len);
+	if (!rc) {
+		printf("PCR #%u extended with %d byte %s digest\n", index,
+		       algo_len, tpm2_algorithm_name(algo));
+		print_byte_string(digest, algo_len);
+	}
 
 	unmap_sysmem(digest);
 
@@ -127,15 +139,23 @@ static int do_tpm2_pcr_extend(struct cmd_tbl *cmdtp, int flag, int argc,
 static int do_tpm_pcr_read(struct cmd_tbl *cmdtp, int flag, int argc,
 			   char *const argv[])
 {
+	enum tpm2_algorithms algo = TPM2_ALG_SHA256;
 	struct udevice *dev;
 	struct tpm_chip_priv *priv;
 	u32 index, rc;
+	int algo_len;
 	unsigned int updates;
 	void *data;
 	int ret;
 
-	if (argc != 3)
+	if (argc < 3 || argc > 4)
 		return CMD_RET_USAGE;
+	if (argc == 4) {
+		algo = tpm2_name_to_algorithm(argv[3]);
+		if (algo < 0)
+			return CMD_RET_FAILURE;
+	}
+	algo_len = tpm2_algorithm_to_len(algo);
 
 	ret = get_tpm(&dev);
 	if (ret)
@@ -151,11 +171,12 @@ static int do_tpm_pcr_read(struct cmd_tbl *cmdtp, int flag, int argc,
 
 	data = map_sysmem(simple_strtoul(argv[2], NULL, 0), 0);
 
-	rc = tpm2_pcr_read(dev, index, priv->pcr_select_min, TPM2_ALG_SHA256,
-			   data, TPM2_DIGEST_LEN, &updates);
+	rc = tpm2_pcr_read(dev, index, priv->pcr_select_min, algo,
+			   data, algo_len, &updates);
 	if (!rc) {
-		printf("PCR #%u content (%u known updates):\n", index, updates);
-		print_byte_string(data, TPM2_DIGEST_LEN);
+		printf("PCR #%u %s %d byte content (%u known updates):\n", index,
+		       tpm2_algorithm_name(algo), algo_len, updates);
+		print_byte_string(data, algo_len);
 	}
 
 	unmap_sysmem(data);
@@ -415,14 +436,14 @@ U_BOOT_CMD(tpm2, CONFIG_SYS_MAXARGS, 1, do_tpm, "Issue a TPMv2.x command",
 "    <hierarchy> is one of:\n"
 "        * TPM2_RH_LOCKOUT\n"
 "        * TPM2_RH_PLATFORM\n"
-"pcr_extend <pcr> <digest_addr>\n"
-"    Extend PCR #<pcr> with digest at <digest_addr>.\n"
+"pcr_extend <pcr> <digest_addr> [<digest_algo>]\n"
+"    Extend PCR #<pcr> with digest at <digest_addr> with digest_algo.\n"
 "    <pcr>: index of the PCR\n"
-"    <digest_addr>: address of a 32-byte SHA256 digest\n"
-"pcr_read <pcr> <digest_addr>\n"
-"    Read PCR #<pcr> to memory address <digest_addr>.\n"
+"    <digest_addr>: address of digest of digest_algo type (defaults to SHA256)\n"
+"pcr_read <pcr> <digest_addr> [<digest_algo>]\n"
+"    Read PCR #<pcr> to memory address <digest_addr> with <digest_algo>.\n"
 "    <pcr>: index of the PCR\n"
-"    <digest_addr>: address to store the a 32-byte SHA256 digest\n"
+"    <digest_addr>: address of digest of digest_algo type (defaults to SHA256)\n"
 "get_capability <capability> <property> <addr> <count>\n"
 "    Read and display <count> entries indexed by <capability>/<property>.\n"
 "    Values are 4 bytes long and are written at <addr>.\n"

drivers/tpm/tpm2_tis_spi.c

@@ -237,19 +237,22 @@ static int tpm_tis_spi_probe(struct udevice *dev)
 			/* legacy reset */
 			ret = gpio_request_by_name(dev, "gpio-reset", 0,
 						   &reset_gpio, GPIOD_IS_OUT);
-			if (ret) {
+			if (!ret) {
 				log(LOGC_NONE, LOGL_NOTICE,
-				    "%s: missing reset GPIO\n", __func__);
-				goto init;
+				    "%s: gpio-reset is deprecated\n", __func__);
 			}
-			log(LOGC_NONE, LOGL_NOTICE,
-			    "%s: gpio-reset is deprecated\n", __func__);
 		}
-		dm_gpio_set_value(&reset_gpio, 1);
-		mdelay(1);
-		dm_gpio_set_value(&reset_gpio, 0);
+
+		if (!ret) {
+			log(LOGC_NONE, LOGL_WARNING,
+			    "%s: TPM gpio reset should not be used on secure production devices\n",
+			    dev->name);
+			dm_gpio_set_value(&reset_gpio, 1);
+			mdelay(1);
+			dm_gpio_set_value(&reset_gpio, 0);
+		}
 	}
-init:
+
 	/* Ensure a minimum amount of time elapsed since reset of the TPM */
 	mdelay(drv_data->time_before_first_cmd_ms);
 

include/tpm-v2.h

@@ -386,7 +386,54 @@ enum tpm2_algorithms {
 	TPM2_ALG_SM3_256	= 0x12,
 };
 
-extern const enum tpm2_algorithms tpm2_supported_algorithms[4];
+/**
+ * struct digest_info - details of supported digests
+ *
+ * @hash_name:			hash name
+ * @hash_alg:			hash algorithm id
+ * @hash_mask:			hash registry mask
+ * @hash_len:			hash digest length
+ */
+struct digest_info {
+	const char *hash_name;
+	u16 hash_alg;
+	u32 hash_mask;
+	u16 hash_len;
+};
+
+/* Algorithm Registry */
+#define TCG2_BOOT_HASH_ALG_SHA1    0x00000001
+#define TCG2_BOOT_HASH_ALG_SHA256  0x00000002
+#define TCG2_BOOT_HASH_ALG_SHA384  0x00000004
+#define TCG2_BOOT_HASH_ALG_SHA512  0x00000008
+#define TCG2_BOOT_HASH_ALG_SM3_256 0x00000010
+
+static const struct digest_info hash_algo_list[] = {
+	{
+		"sha1",
+		TPM2_ALG_SHA1,
+		TCG2_BOOT_HASH_ALG_SHA1,
+		TPM2_SHA1_DIGEST_SIZE,
+	},
+	{
+		"sha256",
+		TPM2_ALG_SHA256,
+		TCG2_BOOT_HASH_ALG_SHA256,
+		TPM2_SHA256_DIGEST_SIZE,
+	},
+	{
+		"sha384",
+		TPM2_ALG_SHA384,
+		TCG2_BOOT_HASH_ALG_SHA384,
+		TPM2_SHA384_DIGEST_SIZE,
+	},
+	{
+		"sha512",
+		TPM2_ALG_SHA512,
+		TCG2_BOOT_HASH_ALG_SHA512,
+		TPM2_SHA512_DIGEST_SIZE,
+	},
+};
 
 static inline u16 tpm2_algorithm_to_len(enum tpm2_algorithms a)
 {
@@ -404,8 +451,6 @@ static inline u16 tpm2_algorithm_to_len(enum tpm2_algorithms a)
 	}
 }
 
-#define tpm2_algorithm_to_mask(a)	(1 << (a))
-
 /* NV index attributes */
 enum tpm_index_attrs {
 	TPMA_NV_PPWRITE		= 1UL << 0,
@@ -965,4 +1010,30 @@ u32 tpm2_enable_nvcommits(struct udevice *dev, uint vendor_cmd,
  */
 u32 tpm2_auto_start(struct udevice *dev);
 
+/**
+ * tpm2_name_to_algorithm() - Return an algorithm id given a supported
+ *			      algorithm name
+ *
+ * @name: algorithm name
+ * Return: enum tpm2_algorithms or -EINVAL
+ */
+enum tpm2_algorithms tpm2_name_to_algorithm(const char *name);
+
+/**
+ * tpm2_algorithm_name() - Return an algorithm name string for a
+ *			   supported algorithm id
+ *
+ * @algorithm_id: algorithm defined in enum tpm2_algorithms
+ * Return: algorithm name string or ""
+ */
+const char *tpm2_algorithm_name(enum tpm2_algorithms);
+
+/**
+ * tpm2_algorithm_to_mask() - Get a TCG hash mask for algorithm
+ *
+ * @hash_alg: TCG defined algorithm
+ * Return: TCG hashing algorithm bitmaps (or 0 if algo not supported)
+ */
+u32 tpm2_algorithm_to_mask(enum tpm2_algorithms);
+
 #endif /* __TPM_V2_H */

lib/efi_loader/efi_tcg2.c

@@ -414,10 +414,10 @@ static efi_status_t tcg2_hash_pe_image(void *efi, u64 efi_size,
 	}
 
 	digest_list->count = 0;
-	for (i = 0; i < ARRAY_SIZE(tpm2_supported_algorithms); i++) {
-		u16 hash_alg = tpm2_supported_algorithms[i];
+	for (i = 0; i < ARRAY_SIZE(hash_algo_list); i++) {
+		u16 hash_alg = hash_algo_list[i].hash_alg;
 
-		if (!(active & tpm2_algorithm_to_mask(hash_alg)))
+		if (!(active & hash_algo_list[i].hash_mask))
 			continue;
 		switch (hash_alg) {
 		case TPM2_ALG_SHA1: