1 files changed, 134 insertions, 0 deletions

diff --git a/security/keys/trusted.h b/security/keys/trusted.h
new file mode 100644
index 000000000000..3249fbd2b653
--- /dev/null
+++ b/security/keys/trusted.h
@@ -0,0 +1,134 @@
+#ifndef __TRUSTED_KEY_H
+#define __TRUSTED_KEY_H
+
+/* implementation specific TPM constants */
+#define MAX_PCRINFO_SIZE                64
+#define MAX_BUF_SIZE                    512
+#define TPM_GETRANDOM_SIZE              14
+#define TPM_OSAP_SIZE                   36
+#define TPM_OIAP_SIZE                   10
+#define TPM_SEAL_SIZE                   87
+#define TPM_UNSEAL_SIZE                 104
+#define TPM_SIZE_OFFSET                 2
+#define TPM_RETURN_OFFSET               6
+#define TPM_DATA_OFFSET                 10
+
+#define LOAD32(buffer, offset)  (ntohl(*(uint32_t *)&buffer[offset]))
+#define LOAD32N(buffer, offset) (*(uint32_t *)&buffer[offset])
+#define LOAD16(buffer, offset)  (ntohs(*(uint16_t *)&buffer[offset]))
+
+struct tpm_buf {
+        int len;
+        unsigned char data[MAX_BUF_SIZE];
+};
+
+#define INIT_BUF(tb) (tb->len = 0)
+
+struct osapsess {
+        uint32_t handle;
+        unsigned char secret[SHA1_DIGEST_SIZE];
+        unsigned char enonce[TPM_NONCE_SIZE];
+};
+
+/* discrete values, but have to store in uint16_t for TPM use */
+enum {
+        SEAL_keytype = 1,
+        SRK_keytype = 4
+};
+
+struct trusted_key_options {
+        uint16_t keytype;
+        uint32_t keyhandle;
+        unsigned char keyauth[SHA1_DIGEST_SIZE];
+        unsigned char blobauth[SHA1_DIGEST_SIZE];
+        uint32_t pcrinfo_len;
+        unsigned char pcrinfo[MAX_PCRINFO_SIZE];
+        int pcrlock;
+};
+
+#define TPM_DEBUG 0
+
+#if TPM_DEBUG
+static inline void dump_options(struct trusted_key_options *o)
+{
+        pr_info("trusted_key: sealing key type %d\n", o->keytype);
+        pr_info("trusted_key: sealing key handle %0X\n", o->keyhandle);
+        pr_info("trusted_key: pcrlock %d\n", o->pcrlock);
+        pr_info("trusted_key: pcrinfo %d\n", o->pcrinfo_len);
+        print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE,
+                       16, 1, o->pcrinfo, o->pcrinfo_len, 0);
+}
+
+static inline void dump_payload(struct trusted_key_payload *p)
+{
+        pr_info("trusted_key: key_len %d\n", p->key_len);
+        print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE,
+                       16, 1, p->key, p->key_len, 0);
+        pr_info("trusted_key: bloblen %d\n", p->blob_len);
+        print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE,
+                       16, 1, p->blob, p->blob_len, 0);
+        pr_info("trusted_key: migratable %d\n", p->migratable);
+}
+
+static inline void dump_sess(struct osapsess *s)
+{
+        print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE,
+                       16, 1, &s->handle, 4, 0);
+        pr_info("trusted-key: secret:\n");
+        print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
+                       16, 1, &s->secret, SHA1_DIGEST_SIZE, 0);
+        pr_info("trusted-key: enonce:\n");
+        print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
+                       16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0);
+}
+
+static inline void dump_tpm_buf(unsigned char *buf)
+{
+        int len;
+
+        pr_info("\ntrusted-key: tpm buffer\n");
+        len = LOAD32(buf, TPM_SIZE_OFFSET);
+        print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0);
+}
+#else
+static inline void dump_options(struct trusted_key_options *o)
+{
+}
+
+static inline void dump_payload(struct trusted_key_payload *p)
+{
+}
+
+static inline void dump_sess(struct osapsess *s)
+{
+}
+
+static inline void dump_tpm_buf(unsigned char *buf)
+{
+}
+#endif
+
+static inline void store8(struct tpm_buf *buf, const unsigned char value)
+{
+        buf->data[buf->len++] = value;
+}
+
+static inline void store16(struct tpm_buf *buf, const uint16_t value)
+{
+        *(uint16_t *) & buf->data[buf->len] = htons(value);
+        buf->len += sizeof value;
+}
+
+static inline void store32(struct tpm_buf *buf, const uint32_t value)
+{
+        *(uint32_t *) & buf->data[buf->len] = htonl(value);
+        buf->len += sizeof value;
+}
+
+static inline void storebytes(struct tpm_buf *buf, const unsigned char *in,
+                              const int len)
+{
+        memcpy(buf->data + buf->len, in, len);
+        buf->len += len;
+}
+#endif