diff -up openssh-7.6p1/ssh-pkcs11-client.c.pkcs11-ecdsa openssh-7.6p1/ssh-pkcs11-client.c

--- openssh-7.6p1/ssh-pkcs11-client.c.pkcs11-ecdsa	2018-02-16 13:25:59.426469253 +0100

+++ openssh-7.6p1/ssh-pkcs11-client.c	2018-02-16 13:25:59.428469265 +0100

@@ -31,6 +31,15 @@

 #include <errno.h>

 #include <openssl/rsa.h>

+#ifdef OPENSSL_HAS_ECC

+#include <openssl/ecdsa.h>

+#if ((defined(LIBRESSL_VERSION_NUMBER) && \

+	(LIBRESSL_VERSION_NUMBER >= 0x20010002L))) || \

+	(defined(ECDSA_F_ECDSA_METHOD_NEW)) || \

+	(OPENSSL_VERSION_NUMBER >= 0x00010100L)

+#define ENABLE_PKCS11_ECDSA 1

+#endif

+#endif

 #include "pathnames.h"

 #include "xmalloc.h"

@@ -139,9 +147,9 @@ pkcs11_rsa_private_encrypt(int flen, con

 	return (ret);

 }

-/* redirect the private key encrypt operation to the ssh-pkcs11-helper */

+/* redirect the RSA private key encrypt operation to the ssh-pkcs11-helper */

 static int

-wrap_key(RSA *rsa)

+wrap_rsa_key(RSA *rsa)

 {

 	static RSA_METHOD helper_rsa;

@@ -152,6 +160,81 @@ wrap_key(RSA *rsa)

 	return (0);

 }

+#ifdef ENABLE_PKCS11_ECDSA

+static ECDSA_SIG *

+pkcs11_ecdsa_private_sign(const unsigned char *from, int flen,

+    const BIGNUM *inv, const BIGNUM *rp, EC_KEY * ecdsa)

+{

+	Key key;

+	u_char *blob, *signature = NULL;

+	u_int blen, slen = 0;

+	Buffer msg;

+	ECDSA_SIG *ret = NULL;

+	BIGNUM *r = NULL, *s = NULL;

+

+	key.type = KEY_ECDSA;

+	key.ecdsa = ecdsa;

+	key.ecdsa_nid = sshkey_ecdsa_key_to_nid(ecdsa);

+	if (key_to_blob(&key, &blob, &blen) == 0)

+		return NULL;

+	buffer_init(&msg;;

+	buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST);

+	buffer_put_string(&msg, blob, blen);

+	buffer_put_string(&msg, from, flen);

+	buffer_put_int(&msg, 0);

+	free(blob);

+	send_msg(&msg;;

+	buffer_clear(&msg;;

+

+	if (recv_msg(&msg) == SSH2_AGENT_SIGN_RESPONSE) {

+		signature = buffer_get_string(&msg, &slen);

+		if (slen <= (u_int)ECDSA_size(ecdsa)) {

+			int nlen = slen / 2;

+			ret = ECDSA_SIG_new();

+			r = BN_new();

+			s = BN_new();

+			BN_bin2bn(&signature[0], nlen, r);

+			BN_bin2bn(&signature[nlen], nlen, s);

+			ECDSA_SIG_set0(ret, r, s);

+		}

+		free(signature);

+	}

+	buffer_free(&msg;;

+	return (ret);

+}

+

+/* redirect the ECDSA private key encrypt operation to the ssh-pkcs11-helper */

+static int

+wrap_ecdsa_key(EC_KEY *ecdsa) {

+#if (OPENSSL_VERSION_NUMBER >= 0x00010100L)

+	static EC_KEY_METHOD *helper_ecdsa = NULL;

+	if (helper_ecdsa == NULL) {

+		const EC_KEY_METHOD *def = EC_KEY_get_default_method();

+		helper_ecdsa = EC_KEY_METHOD_new(def);

+		EC_KEY_METHOD_set_sign(helper_ecdsa, NULL, NULL, pkcs11_ecdsa_private_sign);

+	}

+	EC_KEY_set_method(ecdsa, helper_ecdsa);

+#else

+	static ECDSA_METHOD *helper_ecdsa = NULL;

+	if(helper_ecdsa == NULL) {

+		const ECDSA_METHOD *def = ECDSA_get_default_method();

+# ifdef ECDSA_F_ECDSA_METHOD_NEW

+		helper_ecdsa = ECDSA_METHOD_new((ECDSA_METHOD *)def);

+		ECDSA_METHOD_set_name(helper_ecdsa, "ssh-pkcs11-helper-ecdsa");

+		ECDSA_METHOD_set_sign(helper_ecdsa, pkcs11_ecdsa_private_sign);

+# else

+		helper_ecdsa = xcalloc(1, sizeof(*helper_ecdsa));

+		memcpy(helper_ecdsa, def, sizeof(*helper_ecdsa));

+		helper_ecdsa->name = "ssh-pkcs11-helper-ecdsa";

+		helper_ecdsa->ecdsa_do_sign = pkcs11_ecdsa_private_sign;

+# endif

+	}

+	ECDSA_set_method(ecdsa, helper_ecdsa);

+#endif

+	return (0);

+}

+#endif

+

 static int

 pkcs11_start_helper(void)

 {

@@ -212,7 +281,15 @@ pkcs11_add_provider(char *name, char *pi

 			blob = buffer_get_string(&msg, &blen);

 			free(buffer_get_string(&msg, NULL));

 			k = key_from_blob(blob, blen);

-			wrap_key(k->rsa);

+			if(k->type == KEY_RSA) {

+				 wrap_rsa_key(k->rsa);

+#ifdef ENABLE_PKCS11_ECDSA

+			} else if(k->type == KEY_ECDSA) {

+				 wrap_ecdsa_key(k->ecdsa);

+#endif /* ENABLE_PKCS11_ECDSA */

+			} else {

+				/* Unsupported type */

+			}

 			(*keysp)[i] = k;

 			free(blob);

 		}

diff -up openssh-7.6p1/ssh-pkcs11.c.pkcs11-ecdsa openssh-7.6p1/ssh-pkcs11.c

--- openssh-7.6p1/ssh-pkcs11.c.pkcs11-ecdsa	2018-02-16 13:25:59.427469259 +0100

+++ openssh-7.6p1/ssh-pkcs11.c	2018-02-16 13:44:51.270554797 +0100

@@ -32,6 +32,16 @@

 #include "openbsd-compat/sys-queue.h"

 #include <openssl/x509.h>

+#include <openssl/rsa.h>

+#ifdef OPENSSL_HAS_ECC

+#include <openssl/ecdsa.h>

+#if ((defined(LIBRESSL_VERSION_NUMBER) && \

+	(LIBRESSL_VERSION_NUMBER >= 0x20010002L))) || \

+	(defined(ECDSA_F_ECDSA_METHOD_NEW)) || \

+	(OPENSSL_VERSION_NUMBER >= 0x00010100L)

+#define ENABLE_PKCS11_ECDSA 1

+#endif

+#endif

 #define CRYPTOKI_COMPAT

 #include "pkcs11.h"

@@ -67,6 +76,7 @@ TAILQ_HEAD(, pkcs11_provider) pkcs11_pro

 struct pkcs11_key {

 	struct pkcs11_provider	*provider;

 	CK_ULONG		slotidx;

+	CK_ULONG		key_type;

 	int			(*orig_finish)(RSA *rsa);

 	RSA_METHOD		rsa_method;

 	char			*keyid;

@@ -75,6 +85,9 @@ struct pkcs11_key {

 };

 int pkcs11_interactive = 0;

+#ifdef ENABLE_PKCS11_ECDSA

+static int pkcs11_key_idx = -1;

+#endif /* ENABLE_PKCS11_ECDSA */

 /*

  * This can't be in the ssh-pkcs11-uri, becase we can not depend on

@@ -289,6 +302,40 @@ pkcs11_find(struct pkcs11_provider *p, C

 	return (ret);

 }

+int pkcs11_login(struct pkcs11_key *k11, CK_FUNCTION_LIST *f, struct pkcs11_slotinfo *si) {

+	char			*pin = NULL, prompt[1024];

+	CK_RV			rv;

+	if ((si->token.flags & CKF_LOGIN_REQUIRED) && !si->logged_in) {

+		if (!pkcs11_interactive) {

+			error("need pin entry%s", (si->token.flags &

+			    CKF_PROTECTED_AUTHENTICATION_PATH) ?

+			    " on reader keypad" : "");

+			return (-1);

+		}

+		if (si->token.flags & CKF_PROTECTED_AUTHENTICATION_PATH)

+			verbose("Deferring PIN entry to reader keypad.");

+		else {

+			snprintf(prompt, sizeof(prompt),

+			    "Enter PIN for '%s': ", si->token.label);

+			pin = read_passphrase(prompt, RP_ALLOW_EOF);

+			if (pin == NULL)

+				return (-1);	/* bail out */

+		}

+		rv = f->C_Login(si->session, CKU_USER, (u_char *)pin,

+		    (pin != NULL) ? strlen(pin) : 0);

+		if (pin != NULL) {

+			explicit_bzero(pin, strlen(pin));

+			free(pin);

+		}

+		if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) {

+			error("C_Login failed: %lu", rv);

+			return (-1);

+		}

+		si->logged_in = 1;

+	}

+	return 0;

+}

+

 /* openssl callback doing the actual signing operation */

 static int

 pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa,

@@ -310,7 +357,6 @@ pkcs11_rsa_private_encrypt(int flen, con

 		{CKA_ID, NULL, 0},

 		{CKA_SIGN, NULL, sizeof(true_val) }

 	};

-	char			*pin = NULL, prompt[1024];

 	int			rval = -1;

 	key_filter[0].pValue = &private_key_class;

@@ -326,33 +372,8 @@ pkcs11_rsa_private_encrypt(int flen, con

 	}

 	f = k11->provider->module->function_list;

 	si = &k11->provider->module->slotinfo[k11->slotidx];

-	if ((si->token.flags & CKF_LOGIN_REQUIRED) && !si->logged_in) {

-		if (!pkcs11_interactive) {

-			error("need pin entry%s", (si->token.flags &

-			    CKF_PROTECTED_AUTHENTICATION_PATH) ?

-			    " on reader keypad" : "");

-			return (-1);

-		}

-		if (si->token.flags & CKF_PROTECTED_AUTHENTICATION_PATH)

-			verbose("Deferring PIN entry to reader keypad.");

-		else {

-			snprintf(prompt, sizeof(prompt),

-			    "Enter PIN for '%s': ", si->token.label);

-			pin = read_passphrase(prompt, RP_ALLOW_EOF);

-			if (pin == NULL)

-				return (-1);	/* bail out */

-		}

-		rv = f->C_Login(si->session, CKU_USER, (u_char *)pin,

-		    (pin != NULL) ? strlen(pin) : 0);

-		if (pin != NULL) {

-			explicit_bzero(pin, strlen(pin));

-			free(pin);

-		}

-		if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) {

-			error("C_Login failed: %lu", rv);

-			return (-1);

-		}

-		si->logged_in = 1;

+	if(pkcs11_login(k11, f, si)) {

+		return (-1);

 	}

 	key_filter[1].pValue = k11->keyid;

 	key_filter[1].ulValueLen = k11->keyid_len;

@@ -390,6 +411,7 @@ pkcs11_rsa_wrap(struct pkcs11_provider *

 	const RSA_METHOD	*def = RSA_get_default_method();

 	k11 = xcalloc(1, sizeof(*k11));

+	k11->key_type = CKK_RSA;

 	k11->provider = provider;

 	provider->refcount++;	/* provider referenced by RSA key */

 	k11->slotidx = slotidx;

@@ -415,6 +437,184 @@ pkcs11_rsa_wrap(struct pkcs11_provider *

 	return (0);

 }

+#ifdef ENABLE_PKCS11_ECDSA

+static ECDSA_SIG *pkcs11_ecdsa_sign(const unsigned char *dgst, int dgst_len,

+                                    const BIGNUM *inv, const BIGNUM *rp,

+                                    EC_KEY *ecdsa) {

+	struct pkcs11_key	*k11;

+	struct pkcs11_slotinfo	*si;

+	CK_FUNCTION_LIST	*f;

+	CK_OBJECT_HANDLE	obj;

+	CK_ULONG		tlen = 0;

+	CK_RV			rv;

+	CK_OBJECT_CLASS	private_key_class = CKO_PRIVATE_KEY;

+	CK_BBOOL		true_val = CK_TRUE;

+	CK_MECHANISM		mech = {

+		CKM_ECDSA, NULL_PTR, 0

+	};

+	CK_ATTRIBUTE		key_filter[] = {

+		{CKA_CLASS, NULL, sizeof(private_key_class) },

+		{CKA_ID, NULL, 0},

+		{CKA_SIGN, NULL, sizeof(true_val) }

+	};

+	ECDSA_SIG  		*rval = NULL;

+	key_filter[0].pValue = &private_key_class;

+	key_filter[2].pValue = &true_val;

+

+ #if (OPENSSL_VERSION_NUMBER >= 0x00010100L)

+	if ((k11 = (struct pkcs11_key *)EC_KEY_get_ex_data(ecdsa, pkcs11_key_idx)) == NULL) {

+		error("EC_KEY_get_ex_data failed for ecdsa %p", ecdsa);

+ #else

+	if ((k11 = (struct pkcs11_key *)ECDSA_get_ex_data(ecdsa, pkcs11_key_idx)) == NULL) {

+		error("ECDSA_get_ex_data failed for ecdsa %p", ecdsa);

+ #endif

+		return NULL;

+	}

+	if (!k11->provider || !k11->provider->valid) {

+		error("no pkcs11 (valid) provider for ecdsa %p", ecdsa);

+		return NULL;

+	}

+	f = k11->provider->module->function_list;

+	si = &k11->provider->module->slotinfo[k11->slotidx];

+	if(pkcs11_login(k11, f, si)) {

+		return NULL;

+	}

+	key_filter[1].pValue = k11->keyid;

+	key_filter[1].ulValueLen = k11->keyid_len;

+	/* try to find object w/CKA_SIGN first, retry w/o */

+	if (pkcs11_find(k11->provider, k11->slotidx, key_filter, 3, &obj) < 0 &&

+	    pkcs11_find(k11->provider, k11->slotidx, key_filter, 2, &obj) < 0) {

+		error("cannot find private key");

+	} else if ((rv = f->C_SignInit(si->session, &mech, obj)) != CKR_OK) {

+		error("C_SignInit failed: %lu", rv);

+	} else {

+		CK_BYTE_PTR buf = NULL;

+		BIGNUM *r = NULL, *s = NULL;

+		int nlen;

+		/* Make a call to C_Sign to find out the size of the signature */

+		rv = f->C_Sign(si->session, (CK_BYTE *)dgst, dgst_len, NULL, &tlen);

+		if (rv != CKR_OK) {

+			error("C_Sign failed: %lu", rv);

+			return NULL;

+		}

+		if ((buf = xmalloc(tlen)) == NULL) {

+			error("failure to allocate signature buffer");

+			return NULL;

+		}

+		rv = f->C_Sign(si->session, (CK_BYTE *)dgst, dgst_len, buf, &tlen);

+		if (rv != CKR_OK) {

+			error("C_Sign failed: %lu", rv);

+		}

+

+		if ((rval = ECDSA_SIG_new()) == NULL ||

+		    (r = BN_new()) == NULL ||

+		    (s = BN_new()) == NULL) {

+			error("failure to allocate ECDSA signature");

+		} else {

+			/*

+			 * ECDSA signature is 2 large integers of same size returned

+			 * concatenated by PKCS#11, we separate them to create an

+			 * ECDSA_SIG for OpenSSL.

+			 */

+			nlen = tlen / 2;

+			BN_bin2bn(&buf[0], nlen, r);

+			BN_bin2bn(&buf[nlen], nlen, s);

+			ECDSA_SIG_set0(rval, r, s);

+		}

+		free(buf);

+	}

+	return (rval);

+}

+

+#if (OPENSSL_VERSION_NUMBER >= 0x00010100L)

+static EC_KEY_METHOD *get_pkcs11_ecdsa_method(void) {

+	static EC_KEY_METHOD *pkcs11_ecdsa_method = NULL;

+	if(pkcs11_key_idx == -1) {

+		pkcs11_key_idx = EC_KEY_get_ex_new_index(0, NULL, NULL, NULL, 0);

+	}

+	if (pkcs11_ecdsa_method == NULL) {

+		const EC_KEY_METHOD *def = EC_KEY_get_default_method();

+		pkcs11_ecdsa_method = EC_KEY_METHOD_new(def);

+		EC_KEY_METHOD_set_sign(pkcs11_ecdsa_method, NULL, NULL, pkcs11_ecdsa_sign);

+	}

+#else

+static ECDSA_METHOD *get_pkcs11_ecdsa_method(void) {

+	static ECDSA_METHOD *pkcs11_ecdsa_method = NULL;

+	if(pkcs11_key_idx == -1) {

+		pkcs11_key_idx = ECDSA_get_ex_new_index(0, NULL, NULL, NULL, 0);

+	}

+	if(pkcs11_ecdsa_method == NULL) {

+		const ECDSA_METHOD *def = ECDSA_get_default_method();

+ #ifdef ECDSA_F_ECDSA_METHOD_NEW

+		pkcs11_ecdsa_method = ECDSA_METHOD_new((ECDSA_METHOD *)def);

+		ECDSA_METHOD_set_name(pkcs11_ecdsa_method, "pkcs11");

+		ECDSA_METHOD_set_sign(pkcs11_ecdsa_method, pkcs11_ecdsa_sign);

+ #else

+		pkcs11_ecdsa_method = xcalloc(1, sizeof(*pkcs11_ecdsa_method));

+		memcpy(pkcs11_ecdsa_method, def, sizeof(*pkcs11_ecdsa_method));

+		pkcs11_ecdsa_method->name = "pkcs11";

+		pkcs11_ecdsa_method->ecdsa_do_sign = pkcs11_ecdsa_sign;

+ #endif

+	}

+#endif

+	return pkcs11_ecdsa_method;

+}

+

+static int

+pkcs11_ecdsa_wrap(struct pkcs11_provider *provider, CK_ULONG slotidx,

+                  CK_ATTRIBUTE *keyid_attrib, CK_ATTRIBUTE *label_attrib, EC_KEY *ecdsa)

+{

+	struct pkcs11_key *k11;

+	k11 = xcalloc(1, sizeof(*k11));

+	k11->key_type = CKK_EC;

+	k11->provider = provider;

+	provider->refcount++; /* provider referenced by ECDSA key */

+	k11->slotidx = slotidx;

+	/* identify key object on smartcard */

+	k11->keyid_len = keyid_attrib->ulValueLen;

+	if (k11->keyid_len > 0) {

+		k11->keyid = xmalloc(k11->keyid_len);

+		memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len);

+	}

+	if (label_attrib->ulValueLen > 0 ) {

+		k11->label = xmalloc(label_attrib->ulValueLen+1);

+		memcpy(k11->label, label_attrib->pValue, label_attrib->ulValueLen);

+		k11->label[label_attrib->ulValueLen] = 0;

+	}

+ #if (OPENSSL_VERSION_NUMBER >= 0x00010100L)

+	EC_KEY_set_method(ecdsa, get_pkcs11_ecdsa_method());

+	EC_KEY_set_ex_data(ecdsa, pkcs11_key_idx, k11);

+ #else

+	ECDSA_set_method(ecdsa, get_pkcs11_ecdsa_method());

+	ECDSA_set_ex_data(ecdsa, pkcs11_key_idx, k11);

+ #endif

+	return (0);

+}

+#endif /* ENABLE_PKCS11_ECDSA */

+

+int pkcs11_del_key(struct sshkey *key) {

+#ifdef ENABLE_PKCS11_ECDSA

+	if(key->type == KEY_ECDSA) {

+		struct pkcs11_key *k11 = (struct pkcs11_key *)

+ #if (OPENSSL_VERSION_NUMBER >= 0x00010100L)

+			EC_KEY_get_ex_data(key->ecdsa, pkcs11_key_idx);

+ #else

+			ECDSA_get_ex_data(key->ecdsa, pkcs11_key_idx);

+ #endif

+		if (k11 == NULL) {

+			error("EC_KEY_get_ex_data failed for ecdsa %p", key->ecdsa);

+		} else {

+			if (k11->provider)

+				pkcs11_provider_unref(k11->provider);

+			free(k11->keyid);

+			free(k11);

+		}

+	}

+#endif /* ENABLE_PKCS11_ECDSA */

+	sshkey_free(key);

+	return (0);

+}

+

 /* remove trailing spaces */

 static void

 rmspace(u_char *buf, size_t len)

@@ -482,11 +646,13 @@ static int

 pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx,

     struct sshkey ***keysp, int *nkeys, struct pkcs11_uri *uri)

 {

-	size_t filter_size = 1;

+	size_t filter_size = 2;

+	CK_KEY_TYPE pubkey_type = CKK_RSA;

 	CK_OBJECT_CLASS	pubkey_class = CKO_PUBLIC_KEY;

 	CK_OBJECT_CLASS	cert_class = CKO_CERTIFICATE;

 	CK_ATTRIBUTE		pubkey_filter[] = {

 		{ CKA_CLASS, NULL, sizeof(pubkey_class) },

+		{ CKA_KEY_TYPE, NULL, sizeof(pubkey_type) },

 		{ CKA_ID, NULL, 0 },

 		{ CKA_LABEL, NULL, 0 }

 	};

@@ -507,29 +673,60 @@ pkcs11_fetch_keys(struct pkcs11_provider

 		{ CKA_SUBJECT, NULL, 0 },

 		{ CKA_VALUE, NULL, 0 }

 	};

+#ifdef ENABLE_PKCS11_ECDSA

+	CK_KEY_TYPE	        ecdsa_type = CKK_EC;

+	CK_ATTRIBUTE		ecdsa_filter[] = {

+		{ CKA_CLASS, NULL, sizeof(pubkey_class) },

+		{ CKA_KEY_TYPE, NULL, sizeof(ecdsa_type) },

+		{ CKA_ID, NULL, 0 },

+		{ CKA_LABEL, NULL, 0 }

+	};

+	CK_ATTRIBUTE		ecdsa_attribs[] = {

+		{ CKA_ID, NULL, 0 },

+		{ CKA_LABEL, NULL, 0 },

+		{ CKA_EC_PARAMS, NULL, 0 },

+		{ CKA_EC_POINT, NULL, 0 }

+	};

+	ecdsa_filter[0].pValue = &pubkey_class;

+	ecdsa_filter[1].pValue = &ecdsa_type;

+#endif /* ENABLE_PKCS11_ECDSA */

 	pubkey_filter[0].pValue = &pubkey_class;

+	pubkey_filter[1].pValue = &pubkey_type;

 	cert_filter[0].pValue = &cert_class;

 	if (uri->id != NULL) {

 		pubkey_filter[filter_size].pValue = uri->id;

 		pubkey_filter[filter_size].ulValueLen = uri->id_len;

-		cert_filter[filter_size].pValue = uri->id;

-		cert_filter[filter_size].ulValueLen = uri->id_len;

+#ifdef ENABLE_PKCS11_ECDSA

+		ecdsa_filter[filter_size].pValue = uri->id;

+		ecdsa_filter[filter_size].ulValueLen = uri->id_len;

+#endif /* ENABLE_PKCS11_ECDSA */

+		cert_filter[filter_size-1].pValue = uri->id;

+		cert_filter[filter_size-1].ulValueLen = uri->id_len;

 		filter_size++;

 	}

 	if (uri->object != NULL) {

 		pubkey_filter[filter_size].pValue = uri->object;

 		pubkey_filter[filter_size].ulValueLen = strlen(uri->object);

 		pubkey_filter[filter_size].type = CKA_LABEL;

-		cert_filter[filter_size].pValue = uri->object;

-		cert_filter[filter_size].ulValueLen = strlen(uri->object);

-		cert_filter[filter_size].type = CKA_LABEL;

+#ifdef ENABLE_PKCS11_ECDSA

+		ecdsa_filter[filter_size].pValue = uri->object;

+		ecdsa_filter[filter_size].ulValueLen = strlen(uri->object);

+		ecdsa_filter[filter_size].type = CKA_LABEL;

+#endif /* ENABLE_PKCS11_ECDSA */

+		cert_filter[filter_size-1].pValue = uri->object;

+		cert_filter[filter_size-1].ulValueLen = strlen(uri->object);

+		cert_filter[filter_size-1].type = CKA_LABEL;

 		filter_size++;

 	}

 	if (pkcs11_fetch_keys_filter(p, slotidx, pubkey_filter, filter_size,

 	    pubkey_attribs, keysp, nkeys) < 0 ||

-	    pkcs11_fetch_keys_filter(p, slotidx, cert_filter, filter_size,

+#ifdef ENABLE_PKCS11_ECDSA

+	    pkcs11_fetch_keys_filter(p, slotidx, ecdsa_filter, filter_size,

+	    ecdsa_attribs, keysp, nkeys) < 0||

+#endif /* ENABLE_PKCS11_ECDSA */

+	    pkcs11_fetch_keys_filter(p, slotidx, cert_filter, filter_size - 1,

 	    cert_attribs, keysp, nkeys) < 0)

 		return (-1);

 	return (0);

@@ -553,6 +746,11 @@ pkcs11_fetch_keys_filter(struct pkcs11_p

 {

 	struct sshkey		*key;

 	RSA			*rsa;

+#ifdef ENABLE_PKCS11_ECDSA

+	EC_KEY			*ecdsa;

+#else

+	void			*ecdsa;

+#endif /* ENABLE_PKCS11_ECDSA */

 	X509 			*x509;

 	EVP_PKEY		*evp = NULL;

 	int			i;

@@ -608,6 +806,9 @@ pkcs11_fetch_keys_filter(struct pkcs11_p

 		 * or ID, label, subject and value for certificates.

 		 */

 		rsa = NULL;

+#ifdef ENABLE_PKCS11_ECDSA

+		ecdsa = NULL;

+#endif /* ENABLE_PKCS11_ECDSA */

 		if ((rv = f->C_GetAttributeValue(session, obj, attribs, nattribs))

 		    != CKR_OK) {

 			error("C_GetAttributeValue failed: %lu", rv);

@@ -620,6 +821,45 @@ pkcs11_fetch_keys_filter(struct pkcs11_p

 				rsa->e = BN_bin2bn(attribs[3].pValue,

 				    attribs[3].ulValueLen, NULL);

 			}

+#ifdef ENABLE_PKCS11_ECDSA

+		} else if (attribs[2].type == CKA_EC_PARAMS ) {

+			if ((ecdsa = EC_KEY_new()) == NULL) {

+				error("EC_KEY_new failed");

+			} else {

+				const unsigned char *ptr1 = attribs[2].pValue;

+				const unsigned char *ptr2 = attribs[3].pValue;

+				CK_ULONG len1 = attribs[2].ulValueLen;

+				CK_ULONG len2 = attribs[3].ulValueLen;

+				ASN1_OCTET_STRING *point = NULL;

+

+				/*

+				 * CKA_EC_PARAMS contains the curve parameters of the key

+				 * either referenced as an OID or directly with all values.

+				 * CKA_EC_POINT contains the point (public key) on the curve.

+				 * The point is should be returned inside a DER-encoded

+				 * ASN.1 OCTET STRING value (but some implementation).

+				 */

+				if ((point = d2i_ASN1_OCTET_STRING(NULL, &ptr2, len2))) {

+					/* Pointing to OCTET STRING content */

+					ptr2 = point->data;

+					len2 = point->length;

+				} else {

+					/* No OCTET STRING */

+					ptr2 = attribs[3].pValue;

+				}

+

+				if((d2i_ECParameters(&ecdsa, &ptr1, len1) == NULL) ||

+				   (o2i_ECPublicKey(&ecdsa, &ptr2, len2) == NULL)) {

+					EC_KEY_free(ecdsa);

+					ecdsa = NULL;

+					error("EC public key parsing failed");

+				}

+

+				if(point) {

+					ASN1_OCTET_STRING_free(point);

+				}

+			}

+#endif /* ENABLE_PKCS11_ECDSA */

 		} else {

 			cp = attribs[3].pValue;

 			if ((x509 = X509_new()) == NULL) {

@@ -639,13 +879,28 @@ pkcs11_fetch_keys_filter(struct pkcs11_p

 			X509_free(x509);

 			EVP_PKEY_free(evp);

 		}

-		if (rsa && rsa->n && rsa->e &&

-		    pkcs11_rsa_wrap(p, slotidx, &attribs[0], &attribs[1], rsa) == 0) {

-			if ((key = sshkey_new(KEY_UNSPEC)) == NULL)

-				fatal("sshkey_new failed");

-			key->rsa = rsa;

-			key->type = KEY_RSA;

-			key->flags |= SSHKEY_FLAG_EXT;

+		key = NULL;

+		if (rsa || ecdsa) {

+			if (rsa && rsa->n && rsa->e &&

+			    pkcs11_rsa_wrap(p, slotidx, &attribs[0], &attribs[1], rsa) == 0) {

+				if ((key = sshkey_new(KEY_UNSPEC)) == NULL)

+					fatal("sshkey_new failed");

+				key->rsa = rsa;

+				key->type = KEY_RSA;

+				key->flags |= SSHKEY_FLAG_EXT;

+#ifdef ENABLE_PKCS11_ECDSA

+			} else if(ecdsa && pkcs11_ecdsa_wrap(p, slotidx, &attribs[0], &attribs[1], ecdsa) == 0) {

+				if ((key = sshkey_new(KEY_UNSPEC)) == NULL)

+					fatal("sshkey_new failed");

+				key->ecdsa = ecdsa;

+				key->ecdsa_nid = sshkey_ecdsa_key_to_nid(ecdsa);

+				key->type = KEY_ECDSA;

+				key->flags |= SSHKEY_FLAG_EXT;

+#endif /* ENABLE_PKCS11_ECDSA */

+			}

+		}

+

+		if(key) {

 			if (pkcs11_key_included(keysp, nkeys, key)) {

 				sshkey_free(key);

 			} else {

@@ -658,6 +913,10 @@ pkcs11_fetch_keys_filter(struct pkcs11_p

 			}

 		} else if (rsa) {

 			RSA_free(rsa);

+#ifdef ENABLE_PKCS11_ECDSA

+		} else if (ecdsa) {

+			EC_KEY_free(ecdsa);

+#endif /* ENABLE_PKCS11_ECDSA */

 		}

 		for (i = 0; i < nattribs; i++)

 			free(attribs[i].pValue);

diff -up openssh-7.6p1/ssh-pkcs11-helper.c.pkcs11-ecdsa openssh-7.6p1/ssh-pkcs11-helper.c

--- openssh-7.6p1/ssh-pkcs11-helper.c.pkcs11-ecdsa	2017-10-02 21:34:26.000000000 +0200

+++ openssh-7.6p1/ssh-pkcs11-helper.c	2018-02-16 13:25:59.428469265 +0100

@@ -24,6 +24,17 @@

 #include "openbsd-compat/sys-queue.h"

+#include <openssl/rsa.h>

+#ifdef OPENSSL_HAS_ECC

+#include <openssl/ecdsa.h>

+#if ((defined(LIBRESSL_VERSION_NUMBER) && \

+	(LIBRESSL_VERSION_NUMBER >= 0x20010002L))) || \

+	(defined(ECDSA_F_ECDSA_METHOD_NEW)) || \

+	(OPENSSL_VERSION_NUMBER >= 0x00010100L)

+#define ENABLE_PKCS11_ECDSA 1

+#endif

+#endif

+

 #include <stdarg.h>

 #include <string.h>

 #include <unistd.h>

@@ -80,7 +90,7 @@ del_keys_by_name(char *name)

 		if (!strcmp(ki->providername, name)) {

 			TAILQ_REMOVE(&pkcs11_keylist, ki, next);

 			free(ki->providername);

-			sshkey_free(ki->key);

+			pkcs11_del_key(ki->key);

 			free(ki);

 		}

 	}

@@ -164,6 +174,20 @@ process_del(void)

 	sshbuf_free(msg);

 }

+#ifdef ENABLE_PKCS11_ECDSA

+static u_int EC_KEY_order_size(EC_KEY *key)

+{

+	const EC_GROUP *group = EC_KEY_get0_group(key);

+	BIGNUM *order = BN_new();

+	u_int nbytes = 0;

+	if ((group != NULL) && (order != NULL) && EC_GROUP_get_order(group, order, NULL)) {

+		nbytes = BN_num_bytes(order);

+	}

+	BN_clear_free(order);

+	return nbytes;

+}

+#endif /* ENABLE_PKCS11_ECDSA */

+

 static void

 process_sign(void)

 {

@@ -180,14 +204,38 @@ process_sign(void)

 	else {

 		if ((found = lookup_key(key)) != NULL) {

 #ifdef WITH_OPENSSL

-			int ret;

-

-			slen = RSA_size(key->rsa);

-			signature = xmalloc(slen);

-			if ((ret = RSA_private_encrypt(dlen, data, signature,

-			    found->rsa, RSA_PKCS1_PADDING)) != -1) {

-				slen = ret;

-				ok = 0;

+			if(found->type == KEY_RSA) {

+				int ret;

+				slen = RSA_size(key->rsa);

+				signature = xmalloc(slen);

+				if ((ret = RSA_private_encrypt(dlen, data, signature,

+											   found->rsa, RSA_PKCS1_PADDING)) != -1) {

+					slen = ret;

+					ok = 0;

+				}

+#ifdef ENABLE_PKCS11_ECDSA

+			} else if(found->type == KEY_ECDSA) {

+				ECDSA_SIG *sig;

+				const BIGNUM *r = NULL, *s = NULL;

+				if ((sig = ECDSA_do_sign(data, dlen, found->ecdsa)) != NULL) {

+					/* PKCS11 2.3.1 recommends both r and s to have the order size for

+					   backward compatiblity */

+					ECDSA_SIG_get0(sig, &r, &s);

+					u_int o_len = EC_KEY_order_size(found->ecdsa);

+					u_int r_len = BN_num_bytes(r);

+					u_int s_len = BN_num_bytes(s);

+					if (o_len > 0 && r_len <= o_len && s_len <= o_len) {

+						signature = xcalloc(2, o_len);

+						BN_bn2bin(r, signature + o_len - r_len);

+						BN_bn2bin(s, signature + (2 * o_len) - s_len);

+						slen = 2 * o_len;

+						ok = 0;

+					}

+					ECDSA_SIG_free(sig);

+				}

+#endif /* ENABLE_PKCS11_ECDSA */

+			} else {

+				/* Unsupported type */

 			}

 #endif /* WITH_OPENSSL */

 		}

diff -up openssh-7.6p1/ssh-pkcs11.h.pkcs11-ecdsa openssh-7.6p1/ssh-pkcs11.h

--- openssh-7.6p1/ssh-pkcs11.h.pkcs11-ecdsa	2018-02-16 13:25:59.429469272 +0100

+++ openssh-7.6p1/ssh-pkcs11.h	2018-02-16 13:45:29.623800048 +0100

@@ -20,6 +20,7 @@

 int	pkcs11_init(int);

 void	pkcs11_terminate(void);

 int	pkcs11_add_provider(char *, char *, struct sshkey ***);

+int	pkcs11_del_key(struct sshkey *);

 int	pkcs11_add_provider_by_uri(struct pkcs11_uri *, char *, struct sshkey ***);

 int	pkcs11_del_provider(char *);

 int	pkcs11_uri_write(const struct sshkey *, FILE *);

diff -up openssh-7.6p1/ssh-pkcs11.c.old openssh-7.6p1/ssh-pkcs11.c

--- openssh-7.6p1/ssh-pkcs11.c.old	2018-02-16 16:43:08.861520255 +0100

+++ openssh-7.6p1/ssh-pkcs11.c	2018-02-16 16:56:35.312601451 +0100

@@ -917,13 +917,28 @@ pkcs11_fetch_keys_filter(struct pkcs11_p

 			} else if (d2i_X509(&x509, &cp, attribs[3].ulValueLen)

 			    == NULL) {

 				error("d2i_X509 failed");

-			} else if ((evp = X509_get_pubkey(x509)) == NULL ||

-			    evp->type != EVP_PKEY_RSA ||

-			    evp->pkey.rsa == NULL) {

-				debug("X509_get_pubkey failed or no rsa");

-			} else if ((rsa = RSAPublicKey_dup(evp->pkey.rsa))

-			    == NULL) {

-				error("RSAPublicKey_dup");

+			} else if ((evp = X509_get_pubkey(x509)) == NULL) {

+				debug("X509_get_pubkey failed");

+			} else {

+				switch (evp->type) {

+				case EVP_PKEY_RSA:

+					if (evp->pkey.rsa == NULL)

+						debug("Missing RSA key");

+					else if ((rsa = RSAPublicKey_dup(

+					    evp->pkey.rsa)) == NULL)

+						error("RSAPublicKey_dup failed");

+					break;

+				case EVP_PKEY_EC:

+					if (evp->pkey.ecdsa == NULL)

+						debug("Missing ECDSA key");

+					else if ((ecdsa = EC_KEY_dup(

+					    evp->pkey.ecdsa)) == NULL)

+						error("EC_KEY_dup failed");

+					break;

+				default:

+					debug("not a RSA or ECDSA key");

+					break;

+				}

 			}

 			X509_free(x509);

 			EVP_PKEY_free(evp);