+ return PKey(ptr=key,cansign=True)
+ def exportpub(self,format="PEM"):
+ """
+ Returns public key as PEM or DER structure.
+ """
+ b=Membio()
+ if format == "PEM":
+ r=libcrypto.PEM_write_bio_PUBKEY(b.bio,self.key)
+ else:
+ r=libcrypto.i2d_PUBKEY_bio(b.bio,self.key)
+ if r==0:
+ raise PKeyError("error serializing public key")
+ return str(b)
+ def exportpriv(self,format="PEM",password=None,cipher=None):
+ """
+ Returns private key as PEM or DER Structure.
+ If password and cipher are specified, encrypts key
+ on given password, using given algorithm. Cipher must be
+ an ctypescrypto.cipher.CipherType object
+ """
+ b=Membio()
+ if cipher is None:
+ evp_cipher=None
+ else:
+ if password is None:
+ raise NotImplementedError("Interactive password entry is not supported")
+ evp_cipher=cipher.cipher
+ if format == "PEM":
+ r=libcrypto.PEM_write_bio_PrivateKey(b.bio,self.key,evp_cipher,None,0,_cb,
+ password)
+ else:
+ if cipher is not None:
+ raise NotImplementedError("Der-formatted encrypted keys are not supported")
+ r=libcrypto.i2d_PrivateKey_bio(b.bio,self.key)
+ if r==0:
+ raise PKeyError("error serializing private key")
+ return str(b)
+ @staticmethod
+ def _configure_context(ctx,opts,skip=[]):
+ """
+ Configures context of public key operations
+ @param ctx - context to configure
+ @param opts - dictionary of options (from kwargs of calling
+ function)
+ @param skip - list of options which shouldn't be passed to
+ context
+ """
+
+ for oper in opts:
+ if oper in skip:
+ continue
+ rv=libcrypto.EVP_PKEY_CTX_ctrl_str(ctx,oper,str(opts[oper]))
+ if rv==-2:
+ raise PKeyError("Parameter %s is not supported by key"%(oper))
+ if rv<1:
+ raise PKeyError("Error setting parameter %s"(oper))
+# Declare function prototypes
+libcrypto.EVP_PKEY_cmp.argtypes=(c_void_p,c_void_p)
+libcrypto.PEM_read_bio_PrivateKey.restype=c_void_p
+libcrypto.PEM_read_bio_PrivateKey.argtypes=(c_void_p,POINTER(c_void_p),CALLBACK_FUNC,c_char_p)
+libcrypto.PEM_read_bio_PUBKEY.restype=c_void_p
+libcrypto.PEM_read_bio_PUBKEY.argtypes=(c_void_p,POINTER(c_void_p),CALLBACK_FUNC,c_char_p)
+libcrypto.d2i_PUBKEY_bio.restype=c_void_p
+libcrypto.d2i_PUBKEY_bio.argtypes=(c_void_p,c_void_p)
+libcrypto.d2i_PrivateKey_bio.restype=c_void_p
+libcrypto.d2i_PrivateKey_bio.argtypes=(c_void_p,c_void_p)
+libcrypto.EVP_PKEY_print_public.argtypes=(c_void_p,c_void_p,c_int,c_void_p)
+libcrypto.EVP_PKEY_asn1_find_str.restype=c_void_p
+libcrypto.EVP_PKEY_asn1_find_str.argtypes=(c_void_p,c_char_p,c_int)
+libcrypto.EVP_PKEY_asn1_get0_info.restype=c_int
+libcrypto.EVP_PKEY_asn1_get0_info.argtypes=(POINTER(c_int),POINTER(c_int),POINTER(c_int),POINTER(c_char_p), POINTER(c_char_p),c_void_p)
+libcrypto.EVP_PKEY_cmp.restype=c_int
+libcrypto.EVP_PKEY_cmp.argtypes=(c_void_p,c_void_p)
+libcrypto.EVP_PKEY_CTX_ctrl_str.restype=c_int
+libcrypto.EVP_PKEY_CTX_ctrl_str.argtypes=(c_void_p,)
+libcrypto.EVP_PKEY_CTX_free.argtypes=(c_void_p,)
+libcrypto.EVP_PKEY_CTX_new.restype=c_void_p
+libcrypto.EVP_PKEY_CTX_new.argtypes=(c_void_p,c_void_p)
+libcrypto.EVP_PKEY_CTX_new_id.restype=c_void_p
+libcrypto.EVP_PKEY_CTX_new_id.argtypes=(c_int,c_void_p)
+libcrypto.EVP_PKEY_derive.restype=c_int
+libcrypto.EVP_PKEY_derive.argtypes=(c_void_p,c_char_p,POINTER(c_long))
+libcrypto.EVP_PKEY_derive_init.restype=c_int
+libcrypto.EVP_PKEY_derive_init.argtypes=(c_void_p,)
+libcrypto.EVP_PKEY_derive_set_peer.restype=c_int
+libcrypto.EVP_PKEY_derive_set_peer.argtypes=(c_void_p,c_void_p)
+libcrypto.EVP_PKEY_free.argtypes=(c_void_p,)
+libcrypto.EVP_PKEY_keygen.restype=c_int
+libcrypto.EVP_PKEY_keygen.argtypes=(c_void_p,c_void_p)
+libcrypto.EVP_PKEY_keygen_init.restype=c_int
+libcrypto.EVP_PKEY_keygen_init.argtypes=(c_void_p,)
+libcrypto.EVP_PKEY_sign.restype=c_int
+libcrypto.EVP_PKEY_sign.argtypes=(c_void_p,c_char_p,POINTER(c_long),c_char_p,c_long)
+libcrypto.EVP_PKEY_sign_init.restype=c_int
+libcrypto.EVP_PKEY_sign_init.argtypes=(c_void_p,)
+libcrypto.EVP_PKEY_verify.restype=c_int
+libcrypto.EVP_PKEY_verify.argtypes=(c_void_p,c_char_p,c_long,c_char_p,c_long)
+libcrypto.EVP_PKEY_verify_init.restype=c_int
+libcrypto.EVP_PKEY_verify_init.argtypes=(c_void_p,)
+libcrypto.PEM_write_bio_PrivateKey.argtypes=(c_void_p,c_void_p,c_void_p,c_char_p,c_int,CALLBACK_FUNC,c_char_p)
+libcrypto.PEM_write_bio_PUBKEY.argtypes=(c_void_p,c_void_p)
+libcrypto.i2d_PUBKEY_bio.argtypes=(c_void_p,c_void_p)
+libcrypto.i2d_PrivateKey_bio.argtypes=(c_void_p,c_void_p)