| // SPDX-License-Identifier: GPL-2.0-or-later | |
| /* | |
| * xfrm algorithm interface | |
| * | |
| * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> | |
| */ | |
| #include <crypto/acompress.h> | |
| #include <crypto/aead.h> | |
| #include <crypto/hash.h> | |
| #include <crypto/skcipher.h> | |
| #include <linux/module.h> | |
| #include <linux/kernel.h> | |
| #include <linux/pfkeyv2.h> | |
| #include <linux/scatterlist.h> | |
| #include <net/xfrm.h> | |
| #if IS_ENABLED(CONFIG_INET_ESP) || IS_ENABLED(CONFIG_INET6_ESP) | |
| #include <net/esp.h> | |
| #endif | |
| /* | |
| * Algorithms supported by IPsec. These entries contain properties which | |
| * are used in key negotiation and xfrm processing, and are used to verify | |
| * that instantiated crypto transforms have correct parameters for IPsec | |
| * purposes. | |
| */ | |
| static struct xfrm_algo_desc aead_list[] = { | |
| { | |
| .name = "rfc4106(gcm(aes))", | |
| .uinfo = { | |
| .aead = { | |
| .geniv = "seqiv", | |
| .icv_truncbits = 64, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "rfc4106(gcm(aes))", | |
| .uinfo = { | |
| .aead = { | |
| .geniv = "seqiv", | |
| .icv_truncbits = 96, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "rfc4106(gcm(aes))", | |
| .uinfo = { | |
| .aead = { | |
| .geniv = "seqiv", | |
| .icv_truncbits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "rfc4309(ccm(aes))", | |
| .uinfo = { | |
| .aead = { | |
| .geniv = "seqiv", | |
| .icv_truncbits = 64, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "rfc4309(ccm(aes))", | |
| .uinfo = { | |
| .aead = { | |
| .geniv = "seqiv", | |
| .icv_truncbits = 96, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "rfc4309(ccm(aes))", | |
| .uinfo = { | |
| .aead = { | |
| .geniv = "seqiv", | |
| .icv_truncbits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "rfc4543(gcm(aes))", | |
| .uinfo = { | |
| .aead = { | |
| .geniv = "seqiv", | |
| .icv_truncbits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "rfc7539esp(chacha20,poly1305)", | |
| .uinfo = { | |
| .aead = { | |
| .geniv = "seqiv", | |
| .icv_truncbits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 0, | |
| }, | |
| }; | |
| static struct xfrm_algo_desc aalg_list[] = { | |
| { | |
| .name = "digest_null", | |
| .uinfo = { | |
| .auth = { | |
| .icv_truncbits = 0, | |
| .icv_fullbits = 0, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_AALG_NULL, | |
| .sadb_alg_ivlen = 0, | |
| .sadb_alg_minbits = 0, | |
| .sadb_alg_maxbits = 0 | |
| } | |
| }, | |
| { | |
| .name = "hmac(md5)", | |
| .compat = "md5", | |
| .uinfo = { | |
| .auth = { | |
| .icv_truncbits = 96, | |
| .icv_fullbits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_AALG_MD5HMAC, | |
| .sadb_alg_ivlen = 0, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 128 | |
| } | |
| }, | |
| { | |
| .name = "hmac(sha1)", | |
| .compat = "sha1", | |
| .uinfo = { | |
| .auth = { | |
| .icv_truncbits = 96, | |
| .icv_fullbits = 160, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_AALG_SHA1HMAC, | |
| .sadb_alg_ivlen = 0, | |
| .sadb_alg_minbits = 160, | |
| .sadb_alg_maxbits = 160 | |
| } | |
| }, | |
| { | |
| .name = "hmac(sha256)", | |
| .compat = "sha256", | |
| .uinfo = { | |
| .auth = { | |
| .icv_truncbits = 96, | |
| .icv_fullbits = 256, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_AALG_SHA2_256HMAC, | |
| .sadb_alg_ivlen = 0, | |
| .sadb_alg_minbits = 256, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "hmac(sha384)", | |
| .uinfo = { | |
| .auth = { | |
| .icv_truncbits = 192, | |
| .icv_fullbits = 384, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_AALG_SHA2_384HMAC, | |
| .sadb_alg_ivlen = 0, | |
| .sadb_alg_minbits = 384, | |
| .sadb_alg_maxbits = 384 | |
| } | |
| }, | |
| { | |
| .name = "hmac(sha512)", | |
| .uinfo = { | |
| .auth = { | |
| .icv_truncbits = 256, | |
| .icv_fullbits = 512, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_AALG_SHA2_512HMAC, | |
| .sadb_alg_ivlen = 0, | |
| .sadb_alg_minbits = 512, | |
| .sadb_alg_maxbits = 512 | |
| } | |
| }, | |
| { | |
| .name = "xcbc(aes)", | |
| .uinfo = { | |
| .auth = { | |
| .icv_truncbits = 96, | |
| .icv_fullbits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC, | |
| .sadb_alg_ivlen = 0, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 128 | |
| } | |
| }, | |
| { | |
| /* rfc4494 */ | |
| .name = "cmac(aes)", | |
| .uinfo = { | |
| .auth = { | |
| .icv_truncbits = 96, | |
| .icv_fullbits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 0, | |
| }, | |
| { | |
| .name = "hmac(sm3)", | |
| .compat = "sm3", | |
| .uinfo = { | |
| .auth = { | |
| .icv_truncbits = 256, | |
| .icv_fullbits = 256, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_AALG_SM3_256HMAC, | |
| .sadb_alg_ivlen = 0, | |
| .sadb_alg_minbits = 256, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| }; | |
| static struct xfrm_algo_desc ealg_list[] = { | |
| { | |
| .name = "ecb(cipher_null)", | |
| .compat = "cipher_null", | |
| .uinfo = { | |
| .encr = { | |
| .blockbits = 8, | |
| .defkeybits = 0, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_EALG_NULL, | |
| .sadb_alg_ivlen = 0, | |
| .sadb_alg_minbits = 0, | |
| .sadb_alg_maxbits = 0 | |
| } | |
| }, | |
| { | |
| .name = "cbc(des)", | |
| .compat = "des", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "echainiv", | |
| .blockbits = 64, | |
| .defkeybits = 64, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_EALG_DESCBC, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 64, | |
| .sadb_alg_maxbits = 64 | |
| } | |
| }, | |
| { | |
| .name = "cbc(des3_ede)", | |
| .compat = "des3_ede", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "echainiv", | |
| .blockbits = 64, | |
| .defkeybits = 192, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_EALG_3DESCBC, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 192, | |
| .sadb_alg_maxbits = 192 | |
| } | |
| }, | |
| { | |
| .name = "cbc(cast5)", | |
| .compat = "cast5", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "echainiv", | |
| .blockbits = 64, | |
| .defkeybits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_CASTCBC, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 40, | |
| .sadb_alg_maxbits = 128 | |
| } | |
| }, | |
| { | |
| .name = "cbc(blowfish)", | |
| .compat = "blowfish", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "echainiv", | |
| .blockbits = 64, | |
| .defkeybits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_BLOWFISHCBC, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 40, | |
| .sadb_alg_maxbits = 448 | |
| } | |
| }, | |
| { | |
| .name = "cbc(aes)", | |
| .compat = "aes", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "echainiv", | |
| .blockbits = 128, | |
| .defkeybits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_AESCBC, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "cbc(serpent)", | |
| .compat = "serpent", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "echainiv", | |
| .blockbits = 128, | |
| .defkeybits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_SERPENTCBC, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256, | |
| } | |
| }, | |
| { | |
| .name = "cbc(camellia)", | |
| .compat = "camellia", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "echainiv", | |
| .blockbits = 128, | |
| .defkeybits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_CAMELLIACBC, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "cbc(twofish)", | |
| .compat = "twofish", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "echainiv", | |
| .blockbits = 128, | |
| .defkeybits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_TWOFISHCBC, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| { | |
| .name = "rfc3686(ctr(aes))", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "seqiv", | |
| .blockbits = 128, | |
| .defkeybits = 160, /* 128-bit key + 32-bit nonce */ | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_AESCTR, | |
| .sadb_alg_ivlen = 8, | |
| .sadb_alg_minbits = 160, | |
| .sadb_alg_maxbits = 288 | |
| } | |
| }, | |
| { | |
| .name = "cbc(sm4)", | |
| .compat = "sm4", | |
| .uinfo = { | |
| .encr = { | |
| .geniv = "echainiv", | |
| .blockbits = 128, | |
| .defkeybits = 128, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { | |
| .sadb_alg_id = SADB_X_EALG_SM4CBC, | |
| .sadb_alg_ivlen = 16, | |
| .sadb_alg_minbits = 128, | |
| .sadb_alg_maxbits = 256 | |
| } | |
| }, | |
| }; | |
| static struct xfrm_algo_desc calg_list[] = { | |
| { | |
| .name = "deflate", | |
| .uinfo = { | |
| .comp = { | |
| .threshold = 90, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE } | |
| }, | |
| { | |
| .name = "lzs", | |
| .uinfo = { | |
| .comp = { | |
| .threshold = 90, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { .sadb_alg_id = SADB_X_CALG_LZS } | |
| }, | |
| { | |
| .name = "lzjh", | |
| .uinfo = { | |
| .comp = { | |
| .threshold = 50, | |
| } | |
| }, | |
| .pfkey_supported = 1, | |
| .desc = { .sadb_alg_id = SADB_X_CALG_LZJH } | |
| }, | |
| }; | |
| static inline int aalg_entries(void) | |
| { | |
| return ARRAY_SIZE(aalg_list); | |
| } | |
| static inline int ealg_entries(void) | |
| { | |
| return ARRAY_SIZE(ealg_list); | |
| } | |
| static inline int calg_entries(void) | |
| { | |
| return ARRAY_SIZE(calg_list); | |
| } | |
| struct xfrm_algo_list { | |
| int (*find)(const char *name, u32 type, u32 mask); | |
| struct xfrm_algo_desc *algs; | |
| int entries; | |
| }; | |
| static const struct xfrm_algo_list xfrm_aead_list = { | |
| .find = crypto_has_aead, | |
| .algs = aead_list, | |
| .entries = ARRAY_SIZE(aead_list), | |
| }; | |
| static const struct xfrm_algo_list xfrm_aalg_list = { | |
| .find = crypto_has_ahash, | |
| .algs = aalg_list, | |
| .entries = ARRAY_SIZE(aalg_list), | |
| }; | |
| static const struct xfrm_algo_list xfrm_ealg_list = { | |
| .find = crypto_has_skcipher, | |
| .algs = ealg_list, | |
| .entries = ARRAY_SIZE(ealg_list), | |
| }; | |
| static const struct xfrm_algo_list xfrm_calg_list = { | |
| .find = crypto_has_acomp, | |
| .algs = calg_list, | |
| .entries = ARRAY_SIZE(calg_list), | |
| }; | |
| static struct xfrm_algo_desc *xfrm_find_algo( | |
| const struct xfrm_algo_list *algo_list, | |
| int match(const struct xfrm_algo_desc *entry, const void *data), | |
| const void *data, int probe) | |
| { | |
| struct xfrm_algo_desc *list = algo_list->algs; | |
| int i, status; | |
| for (i = 0; i < algo_list->entries; i++) { | |
| if (!match(list + i, data)) | |
| continue; | |
| if (list[i].available) | |
| return &list[i]; | |
| if (!probe) | |
| break; | |
| status = algo_list->find(list[i].name, 0, 0); | |
| if (!status) | |
| break; | |
| list[i].available = status; | |
| return &list[i]; | |
| } | |
| return NULL; | |
| } | |
| static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry, | |
| const void *data) | |
| { | |
| return entry->desc.sadb_alg_id == (unsigned long)data; | |
| } | |
| struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id) | |
| { | |
| return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match, | |
| (void *)(unsigned long)alg_id, 1); | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid); | |
| struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id) | |
| { | |
| return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match, | |
| (void *)(unsigned long)alg_id, 1); | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid); | |
| struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id) | |
| { | |
| return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match, | |
| (void *)(unsigned long)alg_id, 1); | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_calg_get_byid); | |
| static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry, | |
| const void *data) | |
| { | |
| const char *name = data; | |
| return name && (!strcmp(name, entry->name) || | |
| (entry->compat && !strcmp(name, entry->compat))); | |
| } | |
| struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe) | |
| { | |
| return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name, | |
| probe); | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname); | |
| struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe) | |
| { | |
| return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name, | |
| probe); | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname); | |
| struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe) | |
| { | |
| return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name, | |
| probe); | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_calg_get_byname); | |
| struct xfrm_aead_name { | |
| const char *name; | |
| int icvbits; | |
| }; | |
| static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry, | |
| const void *data) | |
| { | |
| const struct xfrm_aead_name *aead = data; | |
| const char *name = aead->name; | |
| return aead->icvbits == entry->uinfo.aead.icv_truncbits && name && | |
| !strcmp(name, entry->name); | |
| } | |
| struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, int probe) | |
| { | |
| struct xfrm_aead_name data = { | |
| .name = name, | |
| .icvbits = icv_len, | |
| }; | |
| return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data, | |
| probe); | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_aead_get_byname); | |
| struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx) | |
| { | |
| if (idx >= aalg_entries()) | |
| return NULL; | |
| return &aalg_list[idx]; | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx); | |
| struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx) | |
| { | |
| if (idx >= ealg_entries()) | |
| return NULL; | |
| return &ealg_list[idx]; | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx); | |
| /* | |
| * Probe for the availability of crypto algorithms, and set the available | |
| * flag for any algorithms found on the system. This is typically called by | |
| * pfkey during userspace SA add, update or register. | |
| */ | |
| void xfrm_probe_algs(void) | |
| { | |
| int i, status; | |
| BUG_ON(in_softirq()); | |
| for (i = 0; i < aalg_entries(); i++) { | |
| status = crypto_has_ahash(aalg_list[i].name, 0, 0); | |
| if (aalg_list[i].available != status) | |
| aalg_list[i].available = status; | |
| } | |
| for (i = 0; i < ealg_entries(); i++) { | |
| status = crypto_has_skcipher(ealg_list[i].name, 0, 0); | |
| if (ealg_list[i].available != status) | |
| ealg_list[i].available = status; | |
| } | |
| for (i = 0; i < calg_entries(); i++) { | |
| status = crypto_has_acomp(calg_list[i].name, 0, 0); | |
| if (calg_list[i].available != status) | |
| calg_list[i].available = status; | |
| } | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_probe_algs); | |
| int xfrm_count_pfkey_auth_supported(void) | |
| { | |
| int i, n; | |
| for (i = 0, n = 0; i < aalg_entries(); i++) | |
| if (aalg_list[i].available && aalg_list[i].pfkey_supported) | |
| n++; | |
| return n; | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_count_pfkey_auth_supported); | |
| int xfrm_count_pfkey_enc_supported(void) | |
| { | |
| int i, n; | |
| for (i = 0, n = 0; i < ealg_entries(); i++) | |
| if (ealg_list[i].available && ealg_list[i].pfkey_supported) | |
| n++; | |
| return n; | |
| } | |
| EXPORT_SYMBOL_GPL(xfrm_count_pfkey_enc_supported); | |
| MODULE_DESCRIPTION("XFRM Algorithm interface"); | |
| MODULE_LICENSE("GPL"); |