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