Implemented ntru_private_key class

2014-03-18 10:03:16 +01:00
parent 3933798cb1
commit 337f0c8a2f
15 changed files with 1429 additions and 1381 deletions
@@ -28,6 +28,26 @@ typedef struct ntru_param_set_t ntru_param_set_t;

 #include <library.h>

+/**
+ * Encoding types for NTRU encryption public/private key blobs
+ */
+#define NTRU_PUBKEY_TAG           0x01
+#define NTRU_PRIVKEY_DEFAULT_TAG  0x02
+#define NTRU_PRIVKEY_TRITS_TAG    0xfe
+#define NTRU_PRIVKEY_INDICES_TAG  0xff
+
+/**
+ * Size in octets of the OID designating the NTRU encryption parameter set
+ */
+#define NTRU_OID_LEN	3
+
+/**
+ * Packing types for NTRU encryption public/private keys
+ */
+#define NTRU_KEY_PACKED_COEFFICIENTS    0x01
+#define NTRU_KEY_PACKED_INDICES         0x02
+#define NTRU_KEY_PACKED_TRITS           0x03
+
 /**
 * NTRU encryption parameter set ID list
 */
@@ -60,23 +80,23 @@ extern enum_name_t *ntru_param_set_id_names;
 * NTRU encryption parameter set definitions
 */
 struct ntru_param_set_t {
-	ntru_param_set_id_t id;    /* NTRU parameter set ID */
-	uint8_t  oid[3];           /* pointer to OID */
-	uint8_t  der_id;           /* parameter-set DER id */
-	uint8_t  N_bits;           /* no. of bits in N (i.e. in an index */
-	uint16_t N;                /* ring dimension */
-	uint16_t sec_strength_len; /* no. of octets of security strength */
-	uint16_t q;                /* big modulus */
-	uint8_t  q_bits;           /* no. of bits in q (i.e. in a coefficient */
-	bool     is_product_form;  /* if product form used */
-	uint32_t dF_r;             /* no. of +1 or -1 coefficients in ring elements
-                                  F, r */
-	uint16_t dg;               /* no. - 1 of +1 coefficients or
-                                  no.     of -1 coefficients in ring element g */
-	uint16_t m_len_max;        /* max no. of plaintext octets */
-	uint16_t min_msg_rep_wt;   /* min. message representative weight */
-	uint8_t  c_bits;           /* no. bits in candidate for deriving an index */
-	uint8_t  m_len_len;        /* no. of octets to hold mLenOctets */
+	ntru_param_set_id_t id;     /* NTRU parameter set ID */
+	uint8_t  oid[NTRU_OID_LEN]; /* pointer to OID */
+	uint8_t  der_id;            /* parameter-set DER id */
+	uint8_t  N_bits;            /* no. of bits in N (i.e. in an index */
+	uint16_t N;                 /* ring dimension */
+	uint16_t sec_strength_len;  /* no. of octets of security strength */
+	uint16_t q;                 /* big modulus */
+	uint8_t  q_bits;            /* no. of bits in q (i.e. in a coefficient */
+	bool     is_product_form;   /* if product form used */
+	uint32_t dF_r;              /* no. of +1 or -1 coefficients in ring elements
+                                   F, r */
+	uint16_t dg;                /* no. - 1 of +1 coefficients or
+                                   no. of -1 coefficients in ring element g */
+	uint16_t m_len_max;         /* max no. of plaintext octets */
+	uint16_t min_msg_rep_wt;    /* min. message representative weight */
+	uint8_t  c_bits;            /* no. bits in candidate for deriving an index */
+	uint8_t  m_len_len;         /* no. of octets to hold mLenOctets */
 };

 /**