4 files changed, 126 insertions, 4 deletions
diff --git a/include/keys/system_keyring.h b/include/keys/system_keyring.h
index 2419a735420f..91e080efb918 100644
--- a/include/keys/system_keyring.h
+++ b/include/keys/system_keyring.h
@@ -10,6 +10,13 @@
 
 #include <linux/key.h>
 
+enum blacklist_hash_type {
+	/* TBSCertificate hash */
+	BLACKLIST_HASH_X509_TBS = 1,
+	/* Raw data hash */
+	BLACKLIST_HASH_BINARY = 2,
+};
+
 #ifdef CONFIG_SYSTEM_TRUSTED_KEYRING
 
 extern int restrict_link_by_builtin_trusted(struct key *keyring,
@@ -54,13 +61,14 @@ static inline void __init set_machine_trusted_keys(struct key *keyring)
 
 extern struct pkcs7_message *pkcs7;
 #ifdef CONFIG_SYSTEM_BLACKLIST_KEYRING
-extern int mark_hash_blacklisted(const char *hash);
+extern int mark_hash_blacklisted(const u8 *hash, size_t hash_len,
+			       enum blacklist_hash_type hash_type);
 extern int is_hash_blacklisted(const u8 *hash, size_t hash_len,
-			       const char *type);
+			       enum blacklist_hash_type hash_type);
 extern int is_binary_blacklisted(const u8 *hash, size_t hash_len);
 #else
 static inline int is_hash_blacklisted(const u8 *hash, size_t hash_len,
-				      const char *type)
+				      enum blacklist_hash_type hash_type)
 {
 	return 0;
 }
diff --git a/include/keys/trusted-type.h b/include/keys/trusted-type.h
index d89fa2579ac0..4eb64548a74f 100644
--- a/include/keys/trusted-type.h
+++ b/include/keys/trusted-type.h
@@ -64,7 +64,7 @@ struct trusted_key_ops {
 	/* Unseal a key. */
 	int (*unseal)(struct trusted_key_payload *p, char *datablob);
 
-	/* Get a randomized key. */
+	/* Optional: Get a randomized key. */
 	int (*get_random)(unsigned char *key, size_t key_len);
 
 	/* Exit key interface. */
diff --git a/include/keys/trusted_caam.h b/include/keys/trusted_caam.h
new file mode 100644
index 000000000000..73fe2f32f65e
--- /dev/null
+++ b/include/keys/trusted_caam.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021 Pengutronix, Ahmad Fatoum <kernel@pengutronix.de>
+ */
+
+#ifndef __CAAM_TRUSTED_KEY_H
+#define __CAAM_TRUSTED_KEY_H
+
+extern struct trusted_key_ops trusted_key_caam_ops;
+
+#endif
diff --git a/include/soc/fsl/caam-blob.h b/include/soc/fsl/caam-blob.h
new file mode 100644
index 000000000000..937cac52f36d
--- /dev/null
+++ b/include/soc/fsl/caam-blob.h
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 Pengutronix, Ahmad Fatoum <kernel@pengutronix.de>
+ */
+
+#ifndef __CAAM_BLOB_GEN
+#define __CAAM_BLOB_GEN
+
+#include <linux/types.h>
+#include <linux/errno.h>
+
+#define CAAM_BLOB_KEYMOD_LENGTH		16
+#define CAAM_BLOB_OVERHEAD		(32 + 16)
+#define CAAM_BLOB_MAX_LEN		4096
+
+struct caam_blob_priv;
+
+/**
+ * struct caam_blob_info - information for CAAM blobbing
+ * @input:       pointer to input buffer (must be DMAable)
+ * @input_len:   length of @input buffer in bytes.
+ * @output:      pointer to output buffer (must be DMAable)
+ * @output_len:  length of @output buffer in bytes.
+ * @key_mod:     key modifier
+ * @key_mod_len: length of @key_mod in bytes.
+ *	         May not exceed %CAAM_BLOB_KEYMOD_LENGTH
+ */
+struct caam_blob_info {
+	void *input;
+	size_t input_len;
+
+	void *output;
+	size_t output_len;
+
+	const void *key_mod;
+	size_t key_mod_len;
+};
+
+/**
+ * caam_blob_gen_init - initialize blob generation
+ * Return: pointer to new &struct caam_blob_priv instance on success
+ * and ``ERR_PTR(-ENODEV)`` if CAAM has no hardware blobbing support
+ * or no job ring could be allocated.
+ */
+struct caam_blob_priv *caam_blob_gen_init(void);
+
+/**
+ * caam_blob_gen_exit - free blob generation resources
+ * @priv: instance returned by caam_blob_gen_init()
+ */
+void caam_blob_gen_exit(struct caam_blob_priv *priv);
+
+/**
+ * caam_process_blob - encapsulate or decapsulate blob
+ * @priv:   instance returned by caam_blob_gen_init()
+ * @info:   pointer to blobbing info describing key, blob and
+ *          key modifier buffers.
+ * @encap:  true for encapsulation, false for decapsulation
+ *
+ * Return: %0 and sets ``info->output_len`` on success and a negative
+ * error code otherwise.
+ */
+int caam_process_blob(struct caam_blob_priv *priv,
+		      struct caam_blob_info *info, bool encap);
+
+/**
+ * caam_encap_blob - encapsulate blob
+ * @priv:   instance returned by caam_blob_gen_init()
+ * @info:   pointer to blobbing info describing input key,
+ *          output blob and key modifier buffers.
+ *
+ * Return: %0 and sets ``info->output_len`` on success and
+ * a negative error code otherwise.
+ */
+static inline int caam_encap_blob(struct caam_blob_priv *priv,
+				  struct caam_blob_info *info)
+{
+	if (info->output_len < info->input_len + CAAM_BLOB_OVERHEAD)
+		return -EINVAL;
+
+	return caam_process_blob(priv, info, true);
+}
+
+/**
+ * caam_decap_blob - decapsulate blob
+ * @priv:   instance returned by caam_blob_gen_init()
+ * @info:   pointer to blobbing info describing output key,
+ *          input blob and key modifier buffers.
+ *
+ * Return: %0 and sets ``info->output_len`` on success and
+ * a negative error code otherwise.
+ */
+static inline int caam_decap_blob(struct caam_blob_priv *priv,
+				  struct caam_blob_info *info)
+{
+	if (info->input_len < CAAM_BLOB_OVERHEAD ||
+	    info->output_len < info->input_len - CAAM_BLOB_OVERHEAD)
+		return -EINVAL;
+
+	return caam_process_blob(priv, info, false);
+}
+
+#endif