/* Copyright 2015, 2016 OpenMarket Ltd * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* C bindings for base64 functions */ #ifndef OLM_BASE64_H_ #define OLM_BASE64_H_ #include <stddef.h> #include <stdint.h> #ifdef __cplusplus extern "C" { #endif /** * The number of bytes of unpadded base64 needed to encode a length of input. */ size_t _olm_encode_base64_length( size_t input_length ); /** * Encode the raw input as unpadded base64. * Writes encode_base64_length(input_length) bytes to the output buffer. * The input can overlap with the last three quarters of the output buffer. * That is, the input pointer may be output + output_length - input_length. * * Returns number of bytes encoded */ size_t _olm_encode_base64( uint8_t const * input, size_t input_length, uint8_t * output ); /** * The number of bytes of raw data a length of unpadded base64 will encode to. * Returns size_t(-1) if the length is not a valid length for base64. */ size_t _olm_decode_base64_length( size_t input_length ); /** * Decodes the unpadded base64 input to raw bytes. * Writes decode_base64_length(input_length) bytes to the output buffer. * The output can overlap with the first three quarters of the input buffer. * That is, the input pointers and output pointer may be the same. * * Returns number of bytes decoded */ size_t _olm_decode_base64( uint8_t const * input, size_t input_length, uint8_t * output ); #ifdef __cplusplus } // extern "C" #endif #endif /* OLM_BASE64_H_ */