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- /*
- * Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the License); you may
- * not use this file except in compliance with the License.
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- */
- #ifndef GMSSL_BASE64_H
- #define GMSSL_BASE64_H
- #include <stdint.h>
- #include <stdlib.h>
- #ifdef __cplusplus
- extern "C" {
- #endif
- /*
- BASE64 Public API
- BASE64_CTX
- base64_encode_init
- base64_encode_update
- base64_encode_finish
- base64_decode_init
- base64_decode_update
- base64_decode_finish
- */
- typedef struct {
- /* number saved in a partial encode/decode */
- int num;
- /*
- * The length is either the output line length (in input bytes) or the
- * shortest input line length that is ok. Once decoding begins, the
- * length is adjusted up each time a longer line is decoded
- */
- int length;
- /* data to encode */
- unsigned char enc_data[80];
- /* number read on current line */
- int line_num;
- int expect_nl;
- } BASE64_CTX;
- # define BASE64_ENCODE_LENGTH(l) (((l+2)/3*4)+(l/48+1)*2+80)
- # define BASE64_DECODE_LENGTH(l) ((l+3)/4*3+80)
- void base64_encode_init(BASE64_CTX *ctx);
- int base64_encode_update(BASE64_CTX *ctx, const uint8_t *in, int inlen, uint8_t *out, int *outlen);
- void base64_encode_finish(BASE64_CTX *ctx, uint8_t *out, int *outlen);
- void base64_decode_init(BASE64_CTX *ctx);
- int base64_decode_update(BASE64_CTX *ctx, const uint8_t *in, int inlen, uint8_t *out, int *outlen);
- int base64_decode_finish(BASE64_CTX *ctx, uint8_t *out, int *outlen);
- int base64_encode_block(unsigned char *t, const unsigned char *f, int dlen);
- int base64_decode_block(unsigned char *t, const unsigned char *f, int n);
- #ifdef __cplusplus
- }
- #endif
- #endif
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