def proof_export(proof):
bproof = ffi.new("byte_t **")
bproof[0] = ffi.NULL
size = ffi.new("uint32_t *")
if lib.groupsig_proof_export(bproof, size, proof) == constants.IERROR:
raise Exception('Error exporting proof.')
b64proof = base64.b64encode(ffi.buffer(bproof[0], size[0]))
# lib.free(bproof[0])
return b64proof
def gml_export(gml):
"""
Exports a GML to a Base64 string.
Parameters:
gml: The GML to export.
Returns:
A Base64 string. On error, an Exception is thrown.
"""
bgml = ffi.new("byte_t **")
bgml[0] = ffi.NULL
size = ffi.new("uint32_t *")
if lib.gml_export(bgml, size, gml) == constants.IERROR:
raise Exception('Error exporting GML.')
b64gml = base64.b64encode(ffi.buffer(bgml[0], size[0]))
# lib.free(bgml[0])
return b64gml
def grpkey_export(grpkey):
"""
Exports the given group key to a Base64 string.
Parameters:
grpkey: The native group key data structure.
Returns:
A Base64 string. On error, an Exception is thrown.
"""
bkey = ffi.new("byte_t **")
bkey[0] = ffi.NULL
size = ffi.new("uint32_t *")
if lib.groupsig_grp_key_export(bkey, size, grpkey) == constants.IERROR:
raise Exception('Error exporting group key.')
b64 = base64.b64encode(ffi.buffer(bkey[0],size[0]))
b64 = b64.decode('utf-8').replace('\n', '')
# lib.free(bkey[0])
return b64
def blindsig_export(sig):
"""
Exports the given blinded signature to a Base64 string.
Parameters:
sig: The blinded signature to export.
Returns:
The produced Base64 string. On error, an Exception is thrown.
"""
bsig = ffi.new("byte_t **")
bsig[0] = ffi.NULL
size = ffi.new("uint32_t *")
if lib.groupsig_blindsig_export(bsig, size, sig) == constants.IERROR:
raise Exception('Error exporting blindsig.')
b64sig = base64.b64encode(ffi.buffer(bsig[0], size[0]))
b64sig = b64sig.decode('utf-8').replace('\n', '')
# lib.free(bsig[0])
return b64sig
def signature_export(sig):
"""
Exports the given group signature a Base64 string.
Parameters:
sig: The native group signature data structure.
Returns:
A Base64 string. On error, an Exception is thrown.
"""
bsig = ffi.new("byte_t **")
bsig[0] = ffi.NULL
size = ffi.new("uint32_t *")
if lib.groupsig_signature_export(bsig, size, sig) == constants.IERROR:
raise Exception('Error exporting signature.')
b64sig = base64.b64encode(ffi.buffer(bsig[0], size[0]))
b64sig = b64sig.decode('utf-8').replace('\n', '')
# lib.free(bsig[0])
return b64sig
def bldkey_export_pub(bldkey):
"""
Exports the public part of given blinding keypair to a Base64 string.
Parameters:
bldkey: The blinding key to export.
Returns:
The produced Base64 string. On error, an Exception is thrown.
"""
bkey = ffi.new("byte_t **")
bkey[0] = ffi.NULL
size = ffi.new("uint32_t *")
if lib.groupsig_bld_key_export_pub(bkey, size, bldkey) == constants.IERROR:
raise Exception('Error exporting blinding public key.')
b64key = base64.b64encode(ffi.buffer(bkey[0],size[0]))
b64key = b64key.decode('utf-8').replace('\n', '')
# lib.free(bkey[0])
return b64key
