Created newhope plugin implementing the New Hope key exchange algorithm

src/libstrongswan/crypto/diffie_hellman.c

@@ -49,7 +49,9 @@ ENUM_NEXT(diffie_hellman_group_names, NTRU_112_BIT, NTRU_256_BIT, MODP_NULL,
 	"NTRU_128",
 	"NTRU_192",
 	"NTRU_256");
-ENUM_NEXT(diffie_hellman_group_names, MODP_CUSTOM, MODP_CUSTOM, NTRU_256_BIT,
+ENUM_NEXT(diffie_hellman_group_names, NH_128_BIT, NH_128_BIT, NTRU_256_BIT,
+	"NEWHOPE_128");
+ENUM_NEXT(diffie_hellman_group_names, MODP_CUSTOM, MODP_CUSTOM, NH_128_BIT,
 	"MODP_CUSTOM");
 ENUM_END(diffie_hellman_group_names, MODP_CUSTOM);
 
@@ -554,6 +556,7 @@ bool diffie_hellman_verify_value(diffie_hellman_group_t group, chunk_t value)
 		case NTRU_128_BIT:
 		case NTRU_192_BIT:
 		case NTRU_256_BIT:
+		case NH_128_BIT:
 			/* verification currently not supported, do in plugin */
 			valid = FALSE;
 			break;

src/libstrongswan/crypto/diffie_hellman.h

@@ -68,6 +68,7 @@ enum diffie_hellman_group_t {
 	NTRU_128_BIT = 1031,
 	NTRU_192_BIT = 1032,
 	NTRU_256_BIT = 1033,
+	NH_128_BIT   = 1040,
 	/** internally used DH group with additional parameters g and p, outside
 	 * of PRIVATE USE (i.e. IKEv2 DH group range) so it can't be negotiated */
 	MODP_CUSTOM = 65536,

src/libstrongswan/crypto/proposal/proposal_keywords_static.txt

@@ -167,5 +167,6 @@ ntru112,          DIFFIE_HELLMAN_GROUP, NTRU_112_BIT,              0
 ntru128,          DIFFIE_HELLMAN_GROUP, NTRU_128_BIT,              0
 ntru192,          DIFFIE_HELLMAN_GROUP, NTRU_192_BIT,              0
 ntru256,          DIFFIE_HELLMAN_GROUP, NTRU_256_BIT,              0
+newhope128,       DIFFIE_HELLMAN_GROUP, NH_128_BIT,                0
 noesn,            EXTENDED_SEQUENCE_NUMBERS, NO_EXT_SEQ_NUMBERS,   0
 esn,              EXTENDED_SEQUENCE_NUMBERS, EXT_SEQ_NUMBERS,      0