2 $pkey = 'ASN1 OID: prime256v1
3 -----BEGIN EC PARAMETERS-----
5 -----END EC PARAMETERS-----
6 -----BEGIN EC PRIVATE KEY-----
7 MHcCAQEEILPkqoeyM7XgwYkuSj3077lrsrfWJK5LqMolv+m2oOjZoAoGCCqGSM49
8 AwEHoUQDQgAEPq4hbIWHvB51rdWr8ejrjWo4qVNWVugYFtPg/xLQw0mHkIPZ4DvK
9 sqOTOnMoezkbSmVVMuwz9flvnqHGmQvmug==
10 -----END EC PRIVATE KEY-----';
11 $key = openssl_pkey_get_private($pkey);
12 $res = openssl_sign($data ='alpha', $sign, $key, 'ecdsa-with-SHA1');