/* * Copyright (c) 2015 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <vlib/vlib.h> #include <vnet/vnet.h> #include <vnet/pg/pg.h> #include <vppinfra/error.h> #include <vnet/udp/udp.h> #include <vnet/ipsec/ikev2.h> #include <vnet/ipsec/ikev2_priv.h> #include <openssl/obj_mac.h> #include <openssl/ec.h> #include <openssl/x509.h> #include <openssl/pem.h> #include <openssl/bn.h> /* from RFC7296 */ static const char modp_dh_768_prime[] = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" "E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF"; static const char modp_dh_768_generator[] = "02"; static const char modp_dh_1024_prime[] = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381" "FFFFFFFFFFFFFFFF"; static const char modp_dh_1024_generator[] = "02"; /* from RFC3526 */ static const char modp_dh_1536_prime[] = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D" "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" "83655D23DCA3AD961C62F356208552BB9ED529077096966D" "670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF"; static const char modp_dh_1536_generator[] = "02"; static const char modp_dh_2048_prime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static const char modp_dh_2048_generator[] = "02"; static const char modp_dh_3072_prime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static const char modp_dh_3072_generator[] = "02"; static const char modp_dh_4096_prime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static const char modp_dh_4096_generator[] = "02"; static const char modp_dh_6144_prime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static const char modp_dh_6144_generator[] = "02"; static const char modp_dh_8192_prime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static const char modp_dh_8192_generator[] = "02"; /* from RFC5114 */ static const char modp_dh_1024_160_prime[] = "B10B8F96A080E01DDE92DE5EAE5D54EC52C99FBCFB06A3C6" "9A6A9DCA52D23B616073E28675A23D189838EF1E2EE652C0" "13ECB4AEA906112324975C3CD49B83BFACCBDD7D90C4BD70" "98488E9C219A73724EFFD6FAE5644738FAA31A4FF55BCCC0" "A151AF5F0DC8B4BD45BF37DF365C1A65E68CFDA76D4DA708" "DF1FB2BC2E4A4371"; static const char modp_dh_1024_160_generator[] = "A4D1CBD5C3FD34126765A442EFB99905F8104DD258AC507F" "D6406CFF14266D31266FEA1E5C41564B777E690F5504F213" "160217B4B01B886A5E91547F9E2749F4D7FBD7D3B9A92EE1" "909D0D2263F80A76A6A24C087A091F531DBF0A0169B6A28A" "D662A4D18E73AFA32D779D5918D08BC8858F4DCEF97C2A24" "855E6EEB22B3B2E5"; static const char modp_dh_2048_224_prime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static const char modp_dh_2048_224_generator[] = "AC4032EF4F2D9AE39DF30B5C8FFDAC506CDEBE7B89998CAF" "74866A08CFE4FFE3A6824A4E10B9A6F0DD921F01A70C4AFA" "AB739D7700C29F52C57DB17C620A8652BE5E9001A8D66AD7" "C17669101999024AF4D027275AC1348BB8A762D0521BC98A" "E247150422EA1ED409939D54DA7460CDB5F6C6B250717CBE" "F180EB34118E98D119529A45D6F834566E3025E316A330EF" "BB77A86F0C1AB15B051AE3D428C8F8ACB70A8137150B8EEB" "10E183EDD19963DDD9E263E4770589EF6AA21E7F5F2FF381" "B539CCE3409D13CD566AFBB48D6C019181E1BCFE94B30269" "EDFE72FE9B6AA4BD7B5A0F1C71CFFF4C19C418E1F6EC0179" "81BC087F2A7065B384B890D3191F2BFA"; static const char modp_dh_2048_256_prime[] = "87A8E61DB4B6663CFFBBD19C651959998CEEF608660DD0F2" "5D2CEED4435E3B00E00DF8F1D61957D4FAF7DF4561B2AA30" "16C3D91134096FAA3BF4296D830E9A7C209E0C6497517ABD" "5A8A9D306BCF67ED91F9E6725B4758C022E0B1EF4275BF7B" "6C5BFC11D45F9088B941F54EB1E59BB8BC39A0BF12307F5C" "4FDB70C581B23F76B63ACAE1CAA6B7902D52526735488A0E" "F13C6D9A51BFA4AB3AD8347796524D8EF6A167B5A41825D9" "67E144E5140564251CCACB83E6B486F6B3CA3F7971506026" "C0B857F689962856DED4010ABD0BE621C3A3960A54E710C3" "75F26375D7014103A4B54330C198AF126116D2276E11715F" "693877FAD7EF09CADB094AE91E1A1597"; static const char modp_dh_2048_256_generator[] = "3FB32C9B73134D0B2E77506660EDBD484CA7B18F21EF2054" "07F4793A1A0BA12510DBC15077BE463FFF4FED4AAC0BB555" "BE3A6C1B0C6B47B1BC3773BF7E8C6F62901228F8C28CBB18" "A55AE31341000A650196F931C77A57F2DDF463E5E9EC144B" "777DE62AAAB8A8628AC376D282D6ED3864E67982428EBC83" "1D14348F6F2F9193B5045AF2767164E1DFC967C1FB3F2E55" "A4BD1BFFE83B9C80D052B985D182EA0ADB2A3B7313D3FE14" "C8484B1E052588B9B7D2BBD2DF016199ECD06E1557CD0915" "B3353BBB64E0EC377FD028370DF92B52C7891428CDC67EB6" "184B523D1DB246C32F63078490F00EF8D647D148D4795451" "5E2327CFEF98C582664B4C0F6CC41659"; v8 * ikev2_calc_prf (ikev2_sa_transform_t * tr, v8 * key, v8 * data) { HMAC_CTX ctx; v8 *prf; unsigned int len = 0; prf = vec_new (u8, tr->key_trunc); HMAC_CTX_init (&ctx); HMAC_Init_ex (&ctx, key, vec_len (key), tr->md, NULL); HMAC_Update (&ctx, data, vec_len (data)); HMAC_Final (&ctx, prf, &len); HMAC_CTX_cleanup (&ctx); ASSERT (len == tr->key_trunc); return prf; } u8 * ikev2_calc_prfplus (ikev2_sa_transform_t * tr, u8 * key, u8 * seed, int len) { v8 *t = 0, *s = 0, *tmp = 0, *ret = 0; u8 x = 0; /* prf+ (K,S) = T1 | T2 | T3 | T4 | ... where: T1 = prf (K, S | 0x01) T2 = prf (K, T1 | S | 0x02) T3 = prf (K, T2 | S | 0x03) T4 = prf (K, T3 | S | 0x04) */ while (vec_len (ret) < len && x < 255) { if (t) { vec_append (s, t); vec_free (t); } vec_append (s, seed); vec_add2 (s, tmp, 1); *tmp = x + 1; t = ikev2_calc_prf (tr, key, s); vec_append (ret, t); vec_free (s); x++; } vec_free (t); if (x == 255) { vec_free (ret); } return ret; } v8 * ikev2_calc_integr (ikev2_sa_transform_t * tr, v8 * key, u8 * data, int len) { v8 *r; HMAC_CTX hctx; unsigned int l; ASSERT (tr->type == IKEV2_TRANSFORM_TYPE_INTEG); r = vec_new (u8, tr->key_len); /* verify integrity of data */ HMAC_CTX_init (&hctx); HMAC_Init (&hctx, key, vec_len (key), tr->md); HMAC_Update (&hctx, (const u8 *) data, len); HMAC_Final (&hctx, r, &l); HMAC_CTX_cleanup (&hctx); ASSERT (l == tr->key_len); return r; } v8 * ikev2_decrypt_data (ikev2_sa_t * sa, u8 * data, int len) { EVP_CIPHER_CTX ctx; v8 *r; int out_len = 0, block_size; ikev2_sa_transform_t *tr_encr; u8 *key = sa->is_initiator ? sa->sk_er : sa->sk_ei; tr_encr = ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR); block_size = tr_encr->block_size; /* check if data is multiplier of cipher block size */ if (len % block_size) { clib_warning ("wrong data length"); return 0; } EVP_CIPHER_CTX_init (&ctx); r = vec_new (u8, len - block_size); EVP_DecryptInit_ex (&ctx, tr_encr->cipher, NULL, key, data); EVP_DecryptUpdate (&ctx, r, &out_len, data + block_size, len - block_size); EVP_DecryptFinal_ex (&ctx, r + out_len, &out_len); /* remove padding */ _vec_len (r) -= r[vec_len (r) - 1] + 1; EVP_CIPHER_CTX_cleanup (&ctx); return r; } int ikev2_encrypt_data (ikev2_sa_t * sa, v8 * src, u8 * dst) { EVP_CIPHER_CTX ctx; int out_len; int bs; ikev2_sa_transform_t *tr_encr; u8 *key = sa->is_initiator ? sa->sk_ei : sa->sk_er; tr_encr = ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR); bs = tr_encr->block_size; /* generate IV */ RAND_bytes (dst, bs); EVP_CIPHER_CTX_init (&ctx); EVP_EncryptInit_ex (&ctx, tr_encr->cipher, NULL, key, dst /* dst */ ); EVP_EncryptUpdate (&ctx, dst + bs, &out_len, src, vec_len (src)); EVP_CIPHER_CTX_cleanup (&ctx); ASSERT (vec_len (src) == out_len); return out_len + bs; } void ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t) { int r; if (t->dh_group == IKEV2_DH_GROUP_MODP) { DH *dh = DH_new (); BN_hex2bn (&dh->p, t->dh_p); BN_hex2bn (&dh->g, t->dh_g); DH_generate_key (dh); if (sa->is_initiator) { sa->i_dh_data = vec_new (u8, t->key_len); r = BN_bn2bin (dh->pub_key, sa->i_dh_data); ASSERT (r == t->key_len); sa->dh_private_key = vec_new (u8, t->key_len); r = BN_bn2bin (dh->priv_key, sa->dh_private_key); ASSERT (r == t->key_len); } else { sa->r_dh_data = vec_new (u8, t->key_len); r = BN_bn2bin (dh->pub_key, sa->r_dh_data); ASSERT (r == t->key_len); BIGNUM *ex; sa->dh_shared_key = vec_new (u8, t->key_len); ex = BN_bin2bn (sa->i_dh_data, vec_len (sa->i_dh_data), NULL); r = DH_compute_key (sa->dh_shared_key, ex, dh); ASSERT (r == t->key_len); BN_clear_free (ex); } DH_free (dh); } else if (t->dh_group == IKEV2_DH_GROUP_ECP) { EC_KEY *ec = EC_KEY_new_by_curve_name (t->nid); ASSERT (ec); EC_KEY_generate_key (ec); const EC_POINT *r_point = EC_KEY_get0_public_key (ec); const EC_GROUP *group = EC_KEY_get0_group (ec); BIGNUM *x = NULL, *y = NULL; BN_CTX *bn_ctx = BN_CTX_new (); u16 x_off, y_off, len; EC_POINT *i_point = EC_POINT_new (group); EC_POINT *shared_point = EC_POINT_new (group); x = BN_new (); y = BN_new (); len = t->key_len / 2; EC_POINT_get_affine_coordinates_GFp (group, r_point, x, y, bn_ctx); if (sa->is_initiator) { sa->i_dh_data = vec_new (u8, t->key_len); x_off = len - BN_num_bytes (x); memset (sa->i_dh_data, 0, x_off); BN_bn2bin (x, sa->i_dh_data + x_off); y_off = t->key_len - BN_num_bytes (y); memset (sa->i_dh_data + len, 0, y_off - len); BN_bn2bin (y, sa->i_dh_data + y_off); const BIGNUM *prv = EC_KEY_get0_private_key (ec); sa->dh_private_key = vec_new (u8, BN_num_bytes (prv)); r = BN_bn2bin (prv, sa->dh_private_key); ASSERT (r == BN_num_bytes (prv)); } else { sa->r_dh_data = vec_new (u8, t->key_len); x_off = len - BN_num_bytes (x); memset (sa->r_dh_data, 0, x_off); BN_bn2bin (x, sa->r_dh_data + x_off); y_off = t->key_len - BN_num_bytes (y); memset (sa->r_dh_data + len, 0, y_off - len); BN_bn2bin (y, sa->r_dh_data + y_off); x = BN_bin2bn (sa->i_dh_data, len, x); y = BN_bin2bn (sa->i_dh_data + len, len, y); EC_POINT_set_affine_coordinates_GFp (group, i_point, x, y, bn_ctx); sa->dh_shared_key = vec_new (u8, t->key_len); EC_POINT_mul (group, shared_point, NULL, i_point, EC_KEY_get0_private_key (ec), NULL); EC_POINT_get_affine_coordinates_GFp (group, shared_point, x, y, bn_ctx); x_off = len - BN_num_bytes (x); memset (sa->dh_shared_key, 0, x_off); BN_bn2bin (x, sa->dh_shared_key + x_off); y_off = t->key_len - BN_num_bytes (y); memset (sa->dh_shared_key + len, 0, y_off - len); BN_bn2bin (y, sa->dh_shared_key + y_off); } EC_KEY_free (ec); BN_free (x); BN_free (y); BN_CTX_free (bn_ctx); EC_POINT_free (i_point); EC_POINT_free (shared_point); } } void ikev2_complete_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t) { int r; if (t->dh_group == IKEV2_DH_GROUP_MODP) { DH *dh = DH_new (); BN_hex2bn (&dh->p, t->dh_p); BN_hex2bn (&dh->g, t->dh_g); dh->priv_key = BN_bin2bn (sa->dh_private_key, vec_len (sa->dh_private_key), NULL); BIGNUM *ex; sa->dh_shared_key = vec_new (u8, t->key_len); ex = BN_bin2bn (sa->r_dh_data, vec_len (sa->r_dh_data), NULL); r = DH_compute_key (sa->dh_shared_key, ex, dh); ASSERT (r == t->key_len); BN_clear_free (ex); DH_free (dh); } else if (t->dh_group == IKEV2_DH_GROUP_ECP) { EC_KEY *ec = EC_KEY_new_by_curve_name (t->nid); ASSERT (ec); const EC_GROUP *group = EC_KEY_get0_group (ec); BIGNUM *x = NULL, *y = NULL; BN_CTX *bn_ctx = BN_CTX_new (); u16 x_off, y_off, len; BIGNUM *prv; prv = BN_bin2bn (sa->dh_private_key, vec_len (sa->dh_private_key), NULL); EC_KEY_set_private_key (ec, prv); x = BN_new (); y = BN_new (); len = t->key_len / 2; x = BN_bin2bn (sa->r_dh_data, len, x); y = BN_bin2bn (sa->r_dh_data + len, len, y); EC_POINT *r_point = EC_POINT_new (group); EC_POINT_set_affine_coordinates_GFp (group, r_point, x, y, bn_ctx); EC_KEY_set_public_key (ec, r_point); EC_POINT *i_point = EC_POINT_new (group); EC_POINT *shared_point = EC_POINT_new (group); x = BN_bin2bn (sa->i_dh_data, len, x); y = BN_bin2bn (sa->i_dh_data + len, len, y); EC_POINT_set_affine_coordinates_GFp (group, i_point, x, y, bn_ctx); EC_POINT_mul (group, shared_point, NULL, r_point, EC_KEY_get0_private_key (ec), NULL); EC_POINT_get_affine_coordinates_GFp (group, shared_point, x, y, bn_ctx); sa->dh_shared_key = vec_new (u8, t->key_len); x_off = len - BN_num_bytes (x); memset (sa->dh_shared_key, 0, x_off); BN_bn2bin (x, sa->dh_shared_key + x_off); y_off = t->key_len - BN_num_bytes (y); memset (sa->dh_shared_key + len, 0, y_off - len); BN_bn2bin (y, sa->dh_shared_key + y_off); EC_KEY_free (ec); BN_free (x); BN_free (y); BN_free (prv); BN_CTX_free (bn_ctx); EC_POINT_free (i_point); EC_POINT_free (r_point); EC_POINT_free (shared_point); } } int ikev2_verify_sign (EVP_PKEY * pkey, u8 * sigbuf, u8 * data) { EVP_MD_CTX md_ctx; EVP_VerifyInit (&md_ctx, EVP_sha1 ()); EVP_VerifyUpdate (&md_ctx, data, vec_len (data)); return EVP_VerifyFinal (&md_ctx, sigbuf, vec_len (sigbuf), pkey); } u8 * ikev2_calc_sign (EVP_PKEY * pkey, u8 * data) { EVP_MD_CTX md_ctx; unsigned int sig_len = 0; u8 *sign; EVP_SignInit (&md_ctx, EVP_sha1 ()); EVP_SignUpdate (&md_ctx, data, vec_len (data)); /* get sign len */ EVP_SignFinal (&md_ctx, NULL, &sig_len, pkey); sign = vec_new (u8, sig_len); /* calc sign */ EVP_SignFinal (&md_ctx, sign, &sig_len, pkey); return sign; } EVP_PKEY * ikev2_load_cert_file (u8 * file) { FILE *fp; X509 *x509; EVP_PKEY *pkey = NULL; fp = fopen ((char *) file, "r"); if (!fp) { clib_warning ("open %s failed", file); goto end; } x509 = PEM_read_X509 (fp, NULL, NULL, NULL); fclose (fp); if (x509 == NULL) { clib_warning ("read cert %s failed", file); goto end; } pkey = X509_get_pubkey (x509); if (pkey == NULL) clib_warning ("get pubkey %s failed", file); end: return pkey; } EVP_PKEY * ikev2_load_key_file (u8 * file) { FILE *fp; EVP_PKEY *pkey = NULL; fp = fopen ((char *) file, "r"); if (!fp) { clib_warning ("open %s failed", file); goto end; } pkey = PEM_read_PrivateKey (fp, NULL, NULL, NULL); fclose (fp); if (pkey == NULL) clib_warning ("read %s failed", file); end: return pkey; } void ikev2_crypto_init (ikev2_main_t * km) { ikev2_sa_transform_t *tr; /* vector of supported transforms - in order of preference */ vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_ENCR; tr->encr_type = IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC; tr->key_len = 256 / 8; tr->block_size = 128 / 8; tr->cipher = EVP_aes_256_cbc (); vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_ENCR; tr->encr_type = IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC; tr->key_len = 192 / 8; tr->block_size = 128 / 8; tr->cipher = EVP_aes_192_cbc (); vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_ENCR; tr->encr_type = IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC; tr->key_len = 128 / 8; tr->block_size = 128 / 8; tr->cipher = EVP_aes_128_cbc (); vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_PRF; tr->prf_type = IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA1; tr->key_len = 160 / 8; tr->key_trunc = 160 / 8; tr->md = EVP_sha1 (); vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_INTEG; tr->integ_type = IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96; tr->key_len = 160 / 8; tr->key_trunc = 96 / 8; tr->md = EVP_sha1 (); #if defined(OPENSSL_NO_CISCO_FECDH) vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_BRAINPOOL_512; tr->key_len = (512 * 2) / 8; tr->nid = NID_brainpoolP512r1; tr->dh_group = IKEV2_DH_GROUP_ECP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_BRAINPOOL_384; tr->key_len = (384 * 2) / 8; tr->nid = NID_brainpoolP384r1; tr->dh_group = IKEV2_DH_GROUP_ECP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_BRAINPOOL_256; tr->key_len = (256 * 2) / 8; tr->nid = NID_brainpoolP256r1; tr->dh_group = IKEV2_DH_GROUP_ECP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_BRAINPOOL_224; tr->key_len = (224 * 2) / 8; tr->nid = NID_brainpoolP224r1; tr->dh_group = IKEV2_DH_GROUP_ECP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_ECP_224; tr->key_len = (224 * 2) / 8; tr->nid = NID_secp224r1; tr->dh_group = IKEV2_DH_GROUP_ECP; #endif vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_ECP_521; tr->key_len = (528 * 2) / 8; tr->nid = NID_secp521r1; tr->dh_group = IKEV2_DH_GROUP_ECP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_ECP_384; tr->key_len = (384 * 2) / 8; tr->nid = NID_secp384r1; tr->dh_group = IKEV2_DH_GROUP_ECP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_ECP_256; tr->key_len = (256 * 2) / 8; tr->nid = NID_X9_62_prime256v1; tr->dh_group = IKEV2_DH_GROUP_ECP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_ECP_192; tr->key_len = (192 * 2) / 8; tr->nid = NID_X9_62_prime192v1; tr->dh_group = IKEV2_DH_GROUP_ECP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_2048_256; tr->key_len = 2048 / 8; tr->dh_p = (const char *) &modp_dh_2048_256_prime; tr->dh_g = (const char *) &modp_dh_2048_256_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_2048_224; tr->key_len = 2048 / 8; tr->dh_p = (const char *) &modp_dh_2048_224_prime; tr->dh_g = (const char *) &modp_dh_2048_224_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_1024_160; tr->key_len = 1024 / 8; tr->dh_p = (const char *) &modp_dh_1024_160_prime; tr->dh_g = (const char *) &modp_dh_1024_160_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_8192; tr->key_len = 8192 / 8; tr->dh_p = (const char *) &modp_dh_8192_prime; tr->dh_g = (const char *) &modp_dh_8192_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_6144; tr->key_len = 6144 / 8; tr->dh_p = (const char *) &modp_dh_6144_prime; tr->dh_g = (const char *) &modp_dh_6144_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_4096; tr->key_len = 4096 / 8; tr->dh_p = (const char *) &modp_dh_4096_prime; tr->dh_g = (const char *) &modp_dh_4096_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_3072; tr->key_len = 3072 / 8; tr->dh_p = (const char *) &modp_dh_3072_prime; tr->dh_g = (const char *) &modp_dh_3072_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_2048; tr->key_len = 2048 / 8; tr->dh_p = (const char *) &modp_dh_2048_prime; tr->dh_g = (const char *) &modp_dh_2048_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_1536; tr->key_len = 1536 / 8; tr->dh_p = (const char *) &modp_dh_1536_prime; tr->dh_g = (const char *) &modp_dh_1536_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_1024; tr->key_len = 1024 / 8; tr->dh_p = (const char *) &modp_dh_1024_prime; tr->dh_g = (const char *) &modp_dh_1024_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_DH; tr->dh_type = IKEV2_TRANSFORM_DH_TYPE_MODP_768; tr->key_len = 768 / 8; tr->dh_p = (const char *) &modp_dh_768_prime; tr->dh_g = (const char *) &modp_dh_768_generator; tr->dh_group = IKEV2_DH_GROUP_MODP; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_ESN; tr->esn_type = IKEV2_TRANSFORM_ESN_TYPE_ESN; vec_add2 (km->supported_transforms, tr, 1); tr->type = IKEV2_TRANSFORM_TYPE_ESN; tr->esn_type = IKEV2_TRANSFORM_ESN_TYPE_NO_ESN; } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */