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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi there,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’ve been trying to use DES_EDE3_CFB1 encryption in openssl version 1.0.1f but I couldn’t make it work correctly.<o:p></o:p></p><p class=MsoNormal>My understanding is that EVP_CipherUpdate is expecting the input data length (inl) in bytes, not bits as expected.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I tried digging a little the GitHub repository but I’m not sure if it has already been fixed in newer versions.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>According to the link below, AES seems to be handling CFB1 as an exception in crypto/evp/e_aes.c file. However I couldn’t find similar exception for DES.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="https://github.com/openssl/openssl/search?utf8=%E2%9C%93&q=EVP_CIPH_FLAG_LENGTH_BITS">https://github.com/openssl/openssl/search?utf8=%E2%9C%93&q=EVP_CIPH_FLAG_LENGTH_BITS</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Anyone here could ever encode data with bit length which is not a multiple of 8?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Example from FIPS tests:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=PT-BR>KEY1 = 04f16e92fd3b463e<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=PT-BR>KEY2 = 04f16e92fd3b463e<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=PT-BR>KEY3 = 04f16e92fd3b463e<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'>IV = c7203aec8a805910<o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'>PLAINTEXT = 011<o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'>CIPHERTEXT = 110<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks very much,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Marcus<o:p></o:p></p></div></body></html>