left|rightrsasigkey accepts SSH keys but the key format has to be specified explicitly

The default is now PKCS#1. With the dns: and ssh: prefixes other formats
can be selected.

man/ipsec.conf.5.in

@@ -756,9 +756,15 @@ None of the kernel backends currently supports opaque or port ranges and uses
 for policy installation instead.
 .TP
 .BR leftrsasigkey " = <raw rsa public key> | <path to public key>"
-the left participant's public key for RSA signature authentication, in RFC 2537
+the left participant's public key for RSA signature authentication, in PKCS#1
-format using hex (0x prefix) or base64 (0s prefix) encoding. Also accepted is
+format using hex (0x prefix) or base64 (0s prefix) encoding. With the optional
-the path to a file containing the public key in PEM or DER encoding.
+.B dns:
+or
+.B ssh:
+prefix in front of 0x or 0s, the public key is expected to be in either
+the RFC 3110 or RFC 4253 public key format, respectively.
+Also accepted is the path to a file containing the public key in PEM or DER
+encoding.
 .TP
 .BR leftsendcert " = never | no | " ifasked " | always | yes"
 Accepted values are

src/libcharon/plugins/stroke/stroke_cred.c

@@ -284,12 +284,30 @@ METHOD(stroke_cred_t, load_pubkey, certificate_t*,
 {
 	certificate_t *cert;
 	char path[PATH_MAX];
+	builder_part_t build_part;
+	key_type_t build_type = KEY_ANY;
 
 	if (streq(filename, "%dns"))
 	{
-
+		return NULL;
 	}
-	else if (strncaseeq(filename, "0x", 2) || strncaseeq(filename, "0s", 2))
+	if (strncaseeq(filename, "dns:", 4))
+	{	/* RFC 3110 format */
+		build_part = BUILD_BLOB_DNSKEY;
+		/* not a complete RR */
+		build_type = KEY_RSA;
+		filename += 4;
+	}
+	else if (strncaseeq(filename, "ssh:", 4))
+	{	/* SSH key */
+		build_part = BUILD_BLOB_SSHKEY;
+		filename += 4;
+	}
+	else
+	{	/* try PKCS#1 by default */
+		build_part = BUILD_BLOB_ASN1_DER;
+	}
+	if (strncaseeq(filename, "0x", 2) || strncaseeq(filename, "0s", 2))
 	{
 		chunk_t printable_key, raw_key;
 		public_key_t *key;
@@ -298,16 +316,8 @@ METHOD(stroke_cred_t, load_pubkey, certificate_t*,
 		raw_key = strncaseeq(filename, "0x", 2) ?
 								 chunk_from_hex(printable_key, NULL) :
 								 chunk_from_base64(printable_key, NULL);
-		key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
+		key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, build_type,
-								 BUILD_BLOB_ASN1_DER, raw_key,
+								 build_part, raw_key, BUILD_END);
-								 BUILD_END);
-		if (!key)
-		{	/* try RFC 3110 format (as it accepts nearly any blob, the above has
-			 * to be tried first) */
-			key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
-									 BUILD_BLOB_DNSKEY, raw_key,
-									 BUILD_END);
-		}
 		chunk_free(&raw_key);
 		if (key)
 		{

testing/tests/ikev2/net2net-rsa/hosts/moon/etc/ipsec.conf

@@ -13,12 +13,12 @@ conn net-net
 	left=PH_IP_MOON
 	leftsubnet=10.1.0.0/16
 	leftid=@moon.strongswan.org
-	leftrsasigkey=0sAQN+mkeECF5Bm7XnDkkkfmgny/TZndTkN1XzFZWB7nJroM3cTk3zMtdSPX8hY9GQxVGWSsmUBq7mGA5Qx39JpRNpyzxW7wRcMbwqDquG1PRfblLzV1ixdXOGSLUNaXonqDI/h5fCkqTuZtLbE4q3Pf4PmQAwzWVWaTZQ1gXXqUqKlN6218Hm2vbvNRE/CBHuFMmaCz11jckvaPvcqBLZzRTx9b/Mi+qD6xT7k9RpYHmtaGCJ95ed1bY6SZkapgHWu88/3M6bxCzD0KOA3oFbwlkHkFyaGWFB2+fc7L6BfYq0wr/d84tQdOxEn3BwLTrVKo7+6AxDrMi0I+blD2nd9cxj
+	leftrsasigkey=dns:0sAQN+mkeECF5Bm7XnDkkkfmgny/TZndTkN1XzFZWB7nJroM3cTk3zMtdSPX8hY9GQxVGWSsmUBq7mGA5Qx39JpRNpyzxW7wRcMbwqDquG1PRfblLzV1ixdXOGSLUNaXonqDI/h5fCkqTuZtLbE4q3Pf4PmQAwzWVWaTZQ1gXXqUqKlN6218Hm2vbvNRE/CBHuFMmaCz11jckvaPvcqBLZzRTx9b/Mi+qD6xT7k9RpYHmtaGCJ95ed1bY6SZkapgHWu88/3M6bxCzD0KOA3oFbwlkHkFyaGWFB2+fc7L6BfYq0wr/d84tQdOxEn3BwLTrVKo7+6AxDrMi0I+blD2nd9cxj
 	leftauth=pubkey
 	leftfirewall=yes
 	right=PH_IP_SUN
 	rightsubnet=10.2.0.0/16
 	rightid=@sun.strongswan.org
-	rightrsasigkey=0sAQOiSuR9e/WMZFOxK3IdaFBOT2DGoObFDJURejqLcjMpmY2yVbA9Lpc+AEGKxqjb37WG6sVo3fBCDBOAhgmMw9s0b6DTSeXaIQloqW1M8IC+xe1fT+F0BsW1ttaEN0WTF5H+J+a4/arYg4HyiA+sjoqHagnCVPM15Rm5mkmg913XmSCgtkenD4WUq+NfPLuOcggqTjHAAoGD0doswRa3sebyqHQNAb32PXW9ecKi9ExcPrdr5hR5uNXRMYGumBtoxcE6xEvCM/sPRK1hbyynixc5nfMQ5Ymb4mdCUotUGaCyKDa4pF58sYgP6xpd/HXMXGdRP+KxqA4sfes46gp8UuJT
+	rightrsasigkey=dns:0sAQOiSuR9e/WMZFOxK3IdaFBOT2DGoObFDJURejqLcjMpmY2yVbA9Lpc+AEGKxqjb37WG6sVo3fBCDBOAhgmMw9s0b6DTSeXaIQloqW1M8IC+xe1fT+F0BsW1ttaEN0WTF5H+J+a4/arYg4HyiA+sjoqHagnCVPM15Rm5mkmg913XmSCgtkenD4WUq+NfPLuOcggqTjHAAoGD0doswRa3sebyqHQNAb32PXW9ecKi9ExcPrdr5hR5uNXRMYGumBtoxcE6xEvCM/sPRK1hbyynixc5nfMQ5Ymb4mdCUotUGaCyKDa4pF58sYgP6xpd/HXMXGdRP+KxqA4sfes46gp8UuJT
 	rightauth=pubkey
 	auto=add

testing/tests/ikev2/net2net-rsa/hosts/sun/etc/ipsec.conf

@@ -13,10 +13,10 @@ conn net-net
 	left=PH_IP_SUN
 	leftsubnet=10.2.0.0/16
 	leftid=@sun.strongswan.org
-	leftrsasigkey=0sAQOiSuR9e/WMZFOxK3IdaFBOT2DGoObFDJURejqLcjMpmY2yVbA9Lpc+AEGKxqjb37WG6sVo3fBCDBOAhgmMw9s0b6DTSeXaIQloqW1M8IC+xe1fT+F0BsW1ttaEN0WTF5H+J+a4/arYg4HyiA+sjoqHagnCVPM15Rm5mkmg913XmSCgtkenD4WUq+NfPLuOcggqTjHAAoGD0doswRa3sebyqHQNAb32PXW9ecKi9ExcPrdr5hR5uNXRMYGumBtoxcE6xEvCM/sPRK1hbyynixc5nfMQ5Ymb4mdCUotUGaCyKDa4pF58sYgP6xpd/HXMXGdRP+KxqA4sfes46gp8UuJT
+	leftrsasigkey=dns:0sAQOiSuR9e/WMZFOxK3IdaFBOT2DGoObFDJURejqLcjMpmY2yVbA9Lpc+AEGKxqjb37WG6sVo3fBCDBOAhgmMw9s0b6DTSeXaIQloqW1M8IC+xe1fT+F0BsW1ttaEN0WTF5H+J+a4/arYg4HyiA+sjoqHagnCVPM15Rm5mkmg913XmSCgtkenD4WUq+NfPLuOcggqTjHAAoGD0doswRa3sebyqHQNAb32PXW9ecKi9ExcPrdr5hR5uNXRMYGumBtoxcE6xEvCM/sPRK1hbyynixc5nfMQ5Ymb4mdCUotUGaCyKDa4pF58sYgP6xpd/HXMXGdRP+KxqA4sfes46gp8UuJT
 	leftfirewall=yes
 	right=PH_IP_MOON
 	rightsubnet=10.1.0.0/16
 	rightid=@moon.strongswan.org
-	rightrsasigkey=0sAQN+mkeECF5Bm7XnDkkkfmgny/TZndTkN1XzFZWB7nJroM3cTk3zMtdSPX8hY9GQxVGWSsmUBq7mGA5Qx39JpRNpyzxW7wRcMbwqDquG1PRfblLzV1ixdXOGSLUNaXonqDI/h5fCkqTuZtLbE4q3Pf4PmQAwzWVWaTZQ1gXXqUqKlN6218Hm2vbvNRE/CBHuFMmaCz11jckvaPvcqBLZzRTx9b/Mi+qD6xT7k9RpYHmtaGCJ95ed1bY6SZkapgHWu88/3M6bxCzD0KOA3oFbwlkHkFyaGWFB2+fc7L6BfYq0wr/d84tQdOxEn3BwLTrVKo7+6AxDrMi0I+blD2nd9cxj
+	rightrsasigkey=dns:0sAQN+mkeECF5Bm7XnDkkkfmgny/TZndTkN1XzFZWB7nJroM3cTk3zMtdSPX8hY9GQxVGWSsmUBq7mGA5Qx39JpRNpyzxW7wRcMbwqDquG1PRfblLzV1ixdXOGSLUNaXonqDI/h5fCkqTuZtLbE4q3Pf4PmQAwzWVWaTZQ1gXXqUqKlN6218Hm2vbvNRE/CBHuFMmaCz11jckvaPvcqBLZzRTx9b/Mi+qD6xT7k9RpYHmtaGCJ95ed1bY6SZkapgHWu88/3M6bxCzD0KOA3oFbwlkHkFyaGWFB2+fc7L6BfYq0wr/d84tQdOxEn3BwLTrVKo7+6AxDrMi0I+blD2nd9cxj
 	auto=add

testing/tests/ikev2/rw-dnssec/hosts/carol/etc/ipsec.conf

@@ -13,7 +13,7 @@ conn home
 	left=%any
 	leftsourceip=%config
 	leftid=carol.strongswan.org
-	leftrsasigkey="0sAwEAAdBdWU+BF7x4lyo+xHnr4UAOU89yQQuT5vdPoXzx6kRPsjYAuuktgXR+SaLkQHw/YRgDPSKj5nzmmlOQf/rWRr+8O2q+C92aUICmkNvZGamo5w2WlOMZ6T5dk2Hv+QM6xT/GzWyVr1dMYu/7tywD1Bw7aW/HqkRESDu6q95VWu+Lzg6XlxCNEez0YsZrN/fC6BL2qzKAqMBbIHFW8OOnh+nEY4IF5AzkZnFrw12GI72Z882pw97lyKwZhSz/GMQFBJx+rnNdw5P1IJwTlG5PUdoDCte/Mcr1iiA+zOovx55x1GoGxduoXWU5egrf1MtalRf9Pc8Xr4q3WEKTAmsZrVE="
+	leftrsasigkey="dns:0sAwEAAdBdWU+BF7x4lyo+xHnr4UAOU89yQQuT5vdPoXzx6kRPsjYAuuktgXR+SaLkQHw/YRgDPSKj5nzmmlOQf/rWRr+8O2q+C92aUICmkNvZGamo5w2WlOMZ6T5dk2Hv+QM6xT/GzWyVr1dMYu/7tywD1Bw7aW/HqkRESDu6q95VWu+Lzg6XlxCNEez0YsZrN/fC6BL2qzKAqMBbIHFW8OOnh+nEY4IF5AzkZnFrw12GI72Z882pw97lyKwZhSz/GMQFBJx+rnNdw5P1IJwTlG5PUdoDCte/Mcr1iiA+zOovx55x1GoGxduoXWU5egrf1MtalRf9Pc8Xr4q3WEKTAmsZrVE="
 	leftauth=pubkey
 	leftfirewall=yes
 	right=moon.strongswan.org

testing/tests/ikev2/rw-dnssec/hosts/dave/etc/ipsec.conf

@@ -13,7 +13,7 @@ conn home
 	left=%any
 	leftsourceip=%config
 	leftid=dave.strongswan.org
-	leftrsasigkey="0sAwEAAcAH8lNvBVjmg0XT7wF6F1tzQ055f5uXRI5yClmFrqdswFA7jWO04jmvlduD2wr2X4Ng6dlBkSwSEhVkOgrzIYj8UgQT6BZF/44uYjyTYr4bV2SVML9U/a1lYxBhBazpSdfeKJWkdxwjcJCqolZ719mwiyrQn2P2G7qH10YgRuifpFcMs8jkMiIgpzevSMMc0OwhQPNyO5R0LEoUIy4dQJ9rU8GKqmPmk/pdPQaAjpSNuCc1Y9M9vZrETs/XHmBCZXCIWJiz5VOHZ+r073E3Gef9ibMuTj9g2XLvFhdDfU26FK9GkfuOwnWnhVK66diq9xw9Qqynk+8K0J4a81Paq3U="
+	leftrsasigkey="dns:0sAwEAAcAH8lNvBVjmg0XT7wF6F1tzQ055f5uXRI5yClmFrqdswFA7jWO04jmvlduD2wr2X4Ng6dlBkSwSEhVkOgrzIYj8UgQT6BZF/44uYjyTYr4bV2SVML9U/a1lYxBhBazpSdfeKJWkdxwjcJCqolZ719mwiyrQn2P2G7qH10YgRuifpFcMs8jkMiIgpzevSMMc0OwhQPNyO5R0LEoUIy4dQJ9rU8GKqmPmk/pdPQaAjpSNuCc1Y9M9vZrETs/XHmBCZXCIWJiz5VOHZ+r073E3Gef9ibMuTj9g2XLvFhdDfU26FK9GkfuOwnWnhVK66diq9xw9Qqynk+8K0J4a81Paq3U="
 	leftauth=pubkey
 	leftfirewall=yes
 	right=moon.strongswan.org