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85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
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/*********************************************************************
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* function： Base64编码和解码
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* board: esp8266 core for arduino v3.0.2
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* library： PubSubClient2.8.0 & ArduinoJson6.19.1 & OneButton2.0.4
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* source: https://gitee.com/kerwincui/wumei-smart
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* copyright: Copyright (c) 2013 Adam Rudd.
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********************************************************************/
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#ifndef _BASE64_H
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#define _BASE64_H
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/* b64_alphabet:
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* Description: Base64 alphabet table, a mapping between integers
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* and base64 digits
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* Notes: This is an extern here but is defined in Base64.c
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*/
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extern const char b64_alphabet[];
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/* base64_encode:
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* Description:
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* Encode a string of characters as base64
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* Parameters:
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* output: the output buffer for the encoding, stores the encoded string
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* input: the input buffer for the encoding, stores the binary to be encoded
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* inputLen: the length of the input buffer, in bytes
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* Return value:
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* Returns the length of the encoded string
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* Requirements:
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* 1. output must not be null or empty
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* 2. input must not be null
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* 3. inputLen must be greater than or equal to 0
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*/
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int base64_encode(char *output, char *input, int inputLen);
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/* base64_decode:
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* Description:
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* Decode a base64 encoded string into bytes
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* Parameters:
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* output: the output buffer for the decoding,
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* stores the decoded binary
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* input: the input buffer for the decoding,
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* stores the base64 string to be decoded
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* inputLen: the length of the input buffer, in bytes
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* Return value:
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* Returns the length of the decoded string
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* Requirements:
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* 1. output must not be null or empty
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* 2. input must not be null
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* 3. inputLen must be greater than or equal to 0
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*/
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int base64_decode(char *output, char *input, int inputLen);
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/* base64_enc_len:
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* Description:
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* Returns the length of a base64 encoded string whose decoded
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* form is inputLen bytes long
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* Parameters:
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* inputLen: the length of the decoded string
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* Return value:
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* The length of a base64 encoded string whose decoded form
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* is inputLen bytes long
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* Requirements:
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* None
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*/
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int base64_enc_len(int inputLen);
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/* base64_dec_len:
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* Description:
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* Returns the length of the decoded form of a
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* base64 encoded string
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* Parameters:
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* input: the base64 encoded string to be measured
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* inputLen: the length of the base64 encoded string
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* Return value:
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* Returns the length of the decoded form of a
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* base64 encoded string
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* Requirements:
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* 1. input must not be null
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* 2. input must be greater than or equal to zero
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*/
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int base64_dec_len(char *input, int inputLen);
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#endif // _BASE64_H
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