from ctypescrypto import libcrypto
from ctypescrypto.exception import LibCryptoError,clear_err_stack
from ctypescrypto.bio import Membio
-
+import sys
class PKeyError(LibCryptoError):
pass
raise PKeyError("Initailizing sign context")
if libcrypto.EVP_PKEY_sign_init(ctx)<1:
raise PKeyError("sign_init")
- for oper in kwargs:
- rv=libcrypto.EVP_PKEY_CTX_ctrl_str(ctx,oper,kwargs[oper])
- if rv==-2:
- raise PKeyError("Parameter %s is not supported by key"%(oper))
- if rv<1:
- raise PKeyError("Error setting parameter %s"(oper))
+ self._configure_context(ctx,kwargs)
# Find out signature size
siglen=c_long(0)
if libcrypto.EVP_PKEY_sign(ctx,None,byref(siglen),digest,len(digest))<1:
"""
Verifies given signature on given digest
Returns True if Ok, False if don't match
+ Keyword arguments allows to set algorithm-specific
+ parameters
"""
ctx=libcrypto.EVP_PKEY_CTX_new(self.key,None)
if ctx is None:
raise PKeyError("Initailizing verify context")
if libcrypto.EVP_PKEY_verify_init(ctx)<1:
raise PKeyError("verify_init")
- for oper in kwargs:
- rv=libcrypto.EVP_PKEY_CTX_ctrl_str(ctx,oper,kwargs[oper])
- if rv==-2:
- raise PKeyError("Parameter %s is not supported by key"%(oper))
- if rv<1:
- raise PKeyError("Error setting parameter %s"(oper))
+ self._configure_context(ctx,kwargs)
rv=libcrypto.EVP_PKEY_verify(ctx,signature,len(signature),digest,len(digest))
if rv<0:
raise PKeyError("Signature verification")
raise PKeyError("Initailizing derive context")
if libcrypto.EVP_PKEY_derive_init(ctx)<1:
raise PKeyError("derive_init")
- for oper in kwargs:
- rv=libcrypto.EVP_PKEY_CTX_ctrl_str(ctx,oper,kwargs[oper])
- if rv==-2:
- raise PKeyError("Parameter %s is not supported by key"%(oper))
- if rv<1:
- raise PKeyError("Error setting parameter %s"(oper))
+ self._configure_context(self,ctx,kwargs)
if libcrypto.EVP_PKEY_derive_set_peer(ctx,peerkey.key)<=0:
raise PKeyError("Cannot set peer key")
keylen=c_long(0)
raise PKeyError("computing actual shared key")
libcrypto.EVP_PKEY_CTX_free(ctx)
return buf.raw[:keylen]
+ @staticmethod
def generate(algorithm,**kwargs):
"""
Generates new private-public key pair for given algorithm
(string like 'rsa','ec','gost2001') and algorithm-specific
- parameters
+ parameters.
+
+ Algorithm specific paramteers for RSA:
+
+ rsa_keygen_bits=number - size of key to be generated
+ rsa_keygen_pubexp - RSA public expontent(default 65537)
+
+ Algorithn specific parameters for DSA,DH and EC
+
+ paramsfrom=PKey object
+
+ copy parameters of newly generated key from existing key
+
+ Algorithm specific parameters for GOST2001
+
+ paramset= paramset name where name is one of
+ 'A','B','C','XA','XB','test'
+
+ paramsfrom does work too
"""
tmpeng=c_void_p(None)
ameth=libcrypto.EVP_PKEY_asn1_find_str(byref(tmpeng),algorithm,-1)
pkey_id=c_int(0)
libcrypto.EVP_PKEY_asn1_get0_info(byref(pkey_id),None,None,None,None,ameth)
libcrypto.ENGINE_finish(tmpeng)
- ctx=libcrypto.EVP_PKEY_CTX_new_id(pkey_id)
+ if "paramsfrom" in kwargs:
+ ctx=libcrypto.EVP_PKEY_CTX_new(kwargs["paramsfrom"].key,None)
+ else:
+ ctx=libcrypto.EVP_PKEY_CTX_new_id(pkey_id,None)
+ # FIXME support EC curve as keyword param by invoking paramgen
+ # operation
if ctx is None:
raise PKeyError("Creating context for key type %d"%(pkey_id.value))
if libcrypto.EVP_PKEY_keygen_init(ctx) <=0 :
raise PKeyError("keygen_init")
- for oper in kwargs:
- rv=libcrypto.EVP_PKEY_CTX_ctrl_str(ctx,oper,kwargs[oper])
- if rw==-2:
- raise PKeyError("Parameter %s is not supported by key"%(oper))
- if rv<1:
- raise PKeyError("Error setting parameter %s"(oper))
+ PKey._configure_context(ctx,kwargs,["paramsfrom"])
key=c_void_p(None)
if libcrypto.EVP_PKEY_keygen(ctx,byref(key))<=0:
raise PKeyError("Error generating key")
libcrypto.EVP_PKEY_CTX_free(ctx)
return PKey(ptr=key,cansign=True)
+ @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.d2i_PKCS8PrivateKey_bio.restype=c_void_p
-libcrypto.d2i_PKCS8PrivateKey_bio.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,)
projects / oss / ctypescrypto.git / blobdiff