diff --git a/ykcs11/mechanisms.c b/ykcs11/mechanisms.c
index f4a0d78..fd85abd 100644
--- a/ykcs11/mechanisms.c
+++ b/ykcs11/mechanisms.c
@@ -19,7 +19,8 @@ static const CK_MECHANISM_TYPE sign_mechanisms[] = {
   CKM_SHA384_RSA_PKCS_PSS,
   CKM_SHA512_RSA_PKCS_PSS,
   CKM_ECDSA,
-  CKM_ECDSA_SHA1
+  CKM_ECDSA_SHA1,
+  CKM_ECDSA_SHA256
 };
 
 // Supported mechanisms for key pair generation
@@ -126,6 +127,7 @@ CK_BBOOL is_hashed_mechanism(CK_MECHANISM_TYPE m) {
   case CKM_SHA384_RSA_PKCS_PSS:
   case CKM_SHA512_RSA_PKCS_PSS:
   case CKM_ECDSA_SHA1:
+  case CKM_ECDSA_SHA256:
   case CKM_SHA_1:
   case CKM_SHA256:
   case CKM_SHA384:
@@ -160,6 +162,7 @@ CK_RV apply_sign_mechanism_init(op_info_t *op_info) {
 
     case CKM_SHA256_RSA_PKCS:
     case CKM_SHA256_RSA_PKCS_PSS:
+    case CKM_ECDSA_SHA256:
       return do_md_init(YKCS11_SHA256, &op_info->op.sign.md_ctx);
 
     case CKM_SHA384_RSA_PKCS:
@@ -201,6 +204,7 @@ CK_RV apply_sign_mechanism_update(op_info_t *op_info, CK_BYTE_PTR in, CK_ULONG i
   case CKM_SHA384_RSA_PKCS_PSS:
   case CKM_SHA512_RSA_PKCS_PSS:
   case CKM_ECDSA_SHA1:
+  case CKM_ECDSA_SHA256:
     rv = do_md_update(op_info->op.sign.md_ctx, in, in_len);
     if (rv != CKR_OK)
       return CKR_FUNCTION_FAILED;
@@ -278,6 +282,7 @@ CK_RV apply_sign_mechanism_finalize(op_info_t *op_info) {
     return do_pkcs_1_t1(op_info->buf, len, op_info->buf, &op_info->buf_len, op_info->op.sign.key_len);
 
   case CKM_ECDSA_SHA1:
+  case CKM_ECDSA_SHA256:
     // Finalize the hash
     rv = do_md_finalize(op_info->op.sign.md_ctx, op_info->buf, &op_info->buf_len, &nid);
     if (rv != CKR_OK)
@@ -358,7 +363,7 @@ CK_RV check_pubkey_template(op_info_t *op_info, CK_ATTRIBUTE_PTR templ, CK_ULONG
       if (op_info->op.gen.rsa == CK_FALSE)
         return CKR_ATTRIBUTE_VALUE_INVALID;
 
-      if (*((CK_ULONG_PTR)templ[i].pValue) != 1024 &&
+      if (*((CK_ULONG_PTR) templ[i].pValue) != 1024 &&
           *((CK_ULONG_PTR) templ[i].pValue) != 2048) { // TODO: make define?
         DBG(("Unsupported MODULUS_BITS (key length)"));
         return CKR_ATTRIBUTE_VALUE_INVALID;
@@ -386,6 +391,7 @@ CK_RV check_pubkey_template(op_info_t *op_info, CK_ATTRIBUTE_PTR templ, CK_ULONG
     case CKA_ENCRYPT:
     case CKA_VERIFY:
     case CKA_WRAP:
+    case CKA_DERIVE:
       // Ignore these attributes for now
       break;
 
@@ -451,6 +457,7 @@ CK_RV check_pvtkey_template(op_info_t *op_info, CK_ATTRIBUTE_PTR templ, CK_ULONG
     case CKA_SIGN:
     case CKA_PRIVATE:
     case CKA_TOKEN:
+    case CKA_DERIVE:
       // Ignore these attributes for now
       break;
 
diff --git a/ykcs11/pkcs11t.h b/ykcs11/pkcs11t.h
index 9543f5c..f793cfe 100644
--- a/ykcs11/pkcs11t.h
+++ b/ykcs11/pkcs11t.h
@@ -647,6 +647,12 @@ typedef CK_ULONG          CK_MECHANISM_TYPE;
 //#define CKM_ECDSA_KEY_PAIR_GEN         0x00001040 // Deprecated in 2.11
 #define CKM_ECDSA                      0x00001041UL
 #define CKM_ECDSA_SHA1                 0x00001042UL
+/* NOT STANDARD */
+#define CKM_ECDSA_SHA224               0x00001043UL
+#define CKM_ECDSA_SHA256               0x00001044UL
+#define CKM_ECDSA_SHA384               0x00001045UL
+#define CKM_ECDSA_SHA512               0x00001046UL
+/* NOT STANDARD */
 
 /* Added for 2.4 */
 #define CKM_ECDH1_DERIVE               0x00001050UL
diff --git a/ykcs11/yubico_token.c b/ykcs11/yubico_token.c
index 5915780..b005d3a 100644
--- a/ykcs11/yubico_token.c
+++ b/ykcs11/yubico_token.c
@@ -32,6 +32,7 @@ static const CK_MECHANISM_TYPE token_mechanisms[] = { // KEEP ALIGNED WITH token
   //CKM_ECDSA_KEY_PAIR_GEN, Same as CKM_EC_KEY_PAIR_GEN, deprecated in 2.11
   CKM_ECDSA,
   CKM_ECDSA_SHA1,
+  CKM_ECDSA_SHA256,
   CKM_SHA_1,
   CKM_SHA256,
   CKM_SHA384,
@@ -57,6 +58,7 @@ static const CK_MECHANISM_INFO token_mechanism_infos[] = { // KEEP ALIGNED WITH
   //{, , }, // CKM_ECDSA_KEY_PAIR_GEN Same as CKM_EC_KEY_PAIR_GEN deprecated in 2.11
   {MIN_ECC_KEY_SIZE, MAX_ECC_KEY_SIZE, CKF_HW | CKF_SIGN}, // CKM_ECDSA
   {MIN_ECC_KEY_SIZE, MAX_ECC_KEY_SIZE, CKF_HW | CKF_SIGN}, // CKM_ECDSA_SHA1
+  {MIN_ECC_KEY_SIZE, MAX_ECC_KEY_SIZE, CKF_HW | CKF_SIGN}, // CKM_ECDSA_SHA256
   {0, 0, CKF_DIGEST}, // CKM_SHA_1
   {0, 0, CKF_DIGEST}, // CKM_SHA256
   {0, 0, CKF_DIGEST}, // CKM_SHA384