[136] | 1 | /*
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| 2 | ###############################################################################
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| 3 | #
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| 4 | # Temboo Arduino library
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| 5 | #
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| 6 | # Copyright 2014, Temboo Inc.
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| 7 | #
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| 8 | # Licensed under the Apache License, Version 2.0 (the "License");
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| 9 | # you may not use this file except in compliance with the License.
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| 10 | # You may obtain a copy of the License at
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| 11 | #
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| 12 | # http://www.apache.org/licenses/LICENSE-2.0
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| 13 | #
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| 14 | # Unless required by applicable law or agreed to in writing,
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| 15 | # software distributed under the License is distributed on an
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| 16 | # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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| 17 | # either express or implied. See the License for the specific
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| 18 | # language governing permissions and limitations under the License.
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| 19 | #
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| 20 | ###############################################################################
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| 21 | */
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| 22 |
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| 23 | #ifndef TMBHMAC_H_
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| 24 | #define TMBHMAC_H_
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| 25 | #include "tmbmd5.h"
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| 26 | #include "TembooGlobal.h"
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| 27 |
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| 28 | #define HMAC_HASH_SIZE_BYTES (MD5_HASH_SIZE_BYTES)
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| 29 | #define HMAC_BLOCK_SIZE_BYTES (MD5_BLOCK_SIZE_BYTES)
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| 30 |
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| 31 | #define HMAC_HEX_SIZE_BYTES (HMAC_HASH_SIZE_BYTES * 2)
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| 32 |
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| 33 | class HMAC
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| 34 | {
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| 35 | public:
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| 36 | HMAC();
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| 37 | HMAC(const uint8_t* key, uint32_t keyLength);
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| 38 | void init(const uint8_t* key, uint32_t keyLength);
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| 39 | void process(const uint8_t* msg, uint32_t msgLength);
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| 40 | void finish(uint8_t* dest);
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| 41 | void finishHex(char* dest);
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| 42 | enum {
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| 43 | HMAC_OK = 0,
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| 44 | HMAC_ERROR,
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| 45 | HMAC_FAIL_TESTVECTOR
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| 46 | };
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| 47 |
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| 48 | private:
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| 49 | MD5 m_md5;
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| 50 | const uint8_t* m_key;
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| 51 | uint32_t m_keyLength;
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| 52 |
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| 53 | void constructKeyPad(uint8_t* dest, const uint8_t* key, uint32_t keyLength, uint8_t padByte);
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| 54 | void toHex(uint8_t* hmac, char* dest);
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| 55 | };
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| 56 | #endif
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| 57 |
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