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Date: Wed, 5 Mar 2008 19:54:29 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Stephen Hemminger <shemminger@...ux-foundation.org>,
netdev@...r.kernel.org
Subject: [IPROUTE] xfrm: Add combined-mode algorithm support
Hi Stephen:
Here's the patch to add combined-mode algorithm support to ip(8).
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Thanks,
--
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
diff --git a/ip/ipxfrm.c b/ip/ipxfrm.c
index 80dbb52..0a7d39a 100644
--- a/ip/ipxfrm.c
+++ b/ip/ipxfrm.c
@@ -154,7 +154,8 @@ const char *strxf_xfrmproto(__u8 proto)
static const struct typeent algo_types[]= {
{ "enc", XFRMA_ALG_CRYPT }, { "auth", XFRMA_ALG_AUTH },
- { "comp", XFRMA_ALG_COMP }, { NULL, -1 }
+ { "comp", XFRMA_ALG_COMP }, { "aead", XFRMA_ALG_AEAD },
+ { NULL, -1 }
};
int xfrm_algotype_getbyname(char *name)
@@ -525,8 +526,8 @@ void xfrm_selector_print(struct xfrm_selector *sel, __u16 family,
fprintf(fp, "%s", _SL_);
}
-static void xfrm_algo_print(struct xfrm_algo *algo, int type, int len,
- FILE *fp, const char *prefix)
+static void __xfrm_algo_print(struct xfrm_algo *algo, int type, int len,
+ FILE *fp, const char *prefix, int newline)
{
int keylen;
int i;
@@ -558,6 +559,32 @@ static void xfrm_algo_print(struct xfrm_algo *algo, int type, int len,
fprintf(fp, " (%d bits)", algo->alg_key_len);
fin:
+ if (newline)
+ fprintf(fp, "%s", _SL_);
+}
+
+static inline void xfrm_algo_print(struct xfrm_algo *algo, int type, int len,
+ FILE *fp, const char *prefix)
+{
+ return __xfrm_algo_print(algo, type, len, fp, prefix, 1);
+}
+
+static void xfrm_aead_print(struct xfrm_algo_aead *algo, int len,
+ FILE *fp, const char *prefix)
+{
+ struct {
+ struct xfrm_algo algo;
+ char key[algo->alg_key_len / 8];
+ } base;
+
+ memcpy(base.algo.alg_name, algo->alg_name, sizeof(base.algo.alg_name));
+ base.algo.alg_key_len = algo->alg_key_len;
+ memcpy(base.algo.alg_key, algo->alg_key, algo->alg_key_len / 8);
+
+ __xfrm_algo_print(&base.algo, XFRMA_ALG_AEAD, len, fp, prefix, 0);
+
+ fprintf(fp, " %d", algo->alg_icv_len);
+
fprintf(fp, "%s", _SL_);
}
@@ -635,6 +662,12 @@ void xfrm_xfrma_print(struct rtattr *tb[], __u16 family,
XFRMA_ALG_AUTH, RTA_PAYLOAD(rta), fp, prefix);
}
+ if (tb[XFRMA_ALG_AEAD]) {
+ struct rtattr *rta = tb[XFRMA_ALG_AEAD];
+ xfrm_aead_print((struct xfrm_algo_aead *)RTA_DATA(rta),
+ RTA_PAYLOAD(rta), fp, prefix);
+ }
+
if (tb[XFRMA_ALG_CRYPT]) {
struct rtattr *rta = tb[XFRMA_ALG_CRYPT];
xfrm_algo_print((struct xfrm_algo *) RTA_DATA(rta),
diff --git a/ip/xfrm_state.c b/ip/xfrm_state.c
index 0e21203..d821924 100644
--- a/ip/xfrm_state.c
+++ b/ip/xfrm_state.c
@@ -88,8 +88,10 @@ static void usage(void)
fprintf(stderr, "ENCAP-TYPE := espinudp | espinudp-nonike\n");
fprintf(stderr, "ALGO-LIST := [ ALGO-LIST ] | [ ALGO ]\n");
- fprintf(stderr, "ALGO := ALGO_TYPE ALGO_NAME ALGO_KEY\n");
+ fprintf(stderr, "ALGO := ALGO_TYPE ALGO_NAME ALGO_KEY "
+ "[ ALGO_ICV_LEN ]\n");
fprintf(stderr, "ALGO_TYPE := [ ");
+ fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_AEAD));
fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_CRYPT));
fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_AUTH));
fprintf(stderr, "%s ", strxf_algotype(XFRMA_ALG_COMP));
@@ -112,7 +114,7 @@ static void usage(void)
}
static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
- char *name, char *key, int max)
+ char *name, char *key, char *buf, int max)
{
int len;
int slen = strlen(key);
@@ -152,7 +154,7 @@ static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
if (get_u8(&val, vbuf, 16))
invarg("\"ALGOKEY\" is invalid", key);
- alg->alg_key[j] = val;
+ buf[j] = val;
}
} else {
len = slen;
@@ -160,7 +162,7 @@ static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
if (len > max)
invarg("\"ALGOKEY\" makes buffer overflow\n", key);
- strncpy(alg->alg_key, key, len);
+ strncpy(buf, key, len);
}
}
@@ -233,6 +235,7 @@ static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
char buf[RTA_BUF_SIZE];
} req;
char *idp = NULL;
+ char *aeadop = NULL;
char *ealgop = NULL;
char *aalgop = NULL;
char *calgop = NULL;
@@ -316,20 +319,31 @@ static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
/* try to assume ALGO */
int type = xfrm_algotype_getbyname(*argv);
switch (type) {
+ case XFRMA_ALG_AEAD:
case XFRMA_ALG_CRYPT:
case XFRMA_ALG_AUTH:
case XFRMA_ALG_COMP:
{
/* ALGO */
struct {
- struct xfrm_algo alg;
+ union {
+ struct xfrm_algo alg;
+ struct xfrm_algo_aead aead;
+ } u;
char buf[XFRM_ALGO_KEY_BUF_SIZE];
- } alg;
+ } alg = {};
int len;
+ __u32 icvlen;
char *name;
char *key;
+ char *buf;
switch (type) {
+ case XFRMA_ALG_AEAD:
+ if (aeadop)
+ duparg("ALGOTYPE", *argv);
+ aeadop = *argv;
+ break;
case XFRMA_ALG_CRYPT:
if (ealgop)
duparg("ALGOTYPE", *argv);
@@ -360,11 +374,27 @@ static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
NEXT_ARG();
key = *argv;
- memset(&alg, 0, sizeof(alg));
+ buf = alg.u.alg.alg_key;
+ len = sizeof(alg.u.alg);
+
+ if (type != XFRMA_ALG_AEAD)
+ goto parse_algo;
+
+ if (!NEXT_ARG_OK())
+ missarg("ALGOICVLEN");
+ NEXT_ARG();
+ if (get_u32(&icvlen, *argv, 0))
+ invarg("\"aead\" ICV length is invalid",
+ *argv);
+ alg.u.aead.alg_icv_len = icvlen;
+
+ buf = alg.u.aead.alg_key;
+ len = sizeof(alg.u.aead);
+parse_algo:
xfrm_algo_parse((void *)&alg, type, name, key,
- sizeof(alg.buf));
- len = sizeof(struct xfrm_algo) + alg.alg.alg_key_len;
+ buf, sizeof(alg.buf));
+ len += alg.u.alg.alg_key_len;
addattr_l(&req.n, sizeof(req.buf), type,
(void *)&alg, len);
@@ -417,7 +447,7 @@ static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
break;
}
- if (ealgop || aalgop || calgop) {
+ if (aeadop || ealgop || aalgop || calgop) {
if (!xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) {
fprintf(stderr, "\"ALGO\" is invalid with proto=%s\n",
strxf_xfrmproto(req.xsinfo.id.proto));
--
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