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Added option to return Enveloped data as bytes as well as strings. #19

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15 changes: 14 additions & 1 deletion ctypescrypto/cms.py
Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,15 @@ def __str__(self):
raise CMSError("writing CMS to DER")
return str(bio)

def __bytes__(self):
"""
Serialize in DER format. Return bytes
"""
bio = Membio()
if not libcrypto.i2d_CMS_bio(bio.bio, self.ptr):
raise CMSError("writing CMS to DER")
return bytes(bio)

def pem(self):
"""
Serialize in PEM format
Expand Down Expand Up @@ -312,7 +321,11 @@ def decrypt(self, pkey, cert, flags=0):
bio.bio, flags)
if res <= 0:
raise CMSError("decrypting CMS")
return str(bio)

if flags & Flags.BINARY != 0: ## If we are expecting binary data
return bytes(bio) # we return bytes
else:
return str(bio) # else we return a string

class EncryptedData(CMSBase):
"""
Expand Down