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41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
#ifndef CRYPTO1_H
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#define CRYPTO1_H
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#include <stdint.h>
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#include <stdbool.h>
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void Crypto1GetState(uint8_t *pEven, uint8_t *pOdd);
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/* Gets the current keystream-bit, without shifting the internal LFSR */
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uint8_t Crypto1FilterOutput(void);
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/* Set up Crypto1 cipher using the given Key, Uid and CardNonce. Also encrypts
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* the CardNonce in-place while in non-linear mode. */
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void Crypto1Setup(uint8_t Key[6], uint8_t Uid[4], uint8_t CardNonce[4]);
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/* Same for nested auth. CardNonce[4]..[7] will contain the parity bits after return */
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void Crypto1SetupNested(uint8_t Key[6], uint8_t Uid[4], uint8_t CardNonce[8], bool Decrypt);
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/* Load the decrypted ReaderNonce into the Crypto1 state LFSR */
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void Crypto1Auth(uint8_t EncryptedReaderNonce[4]);
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/* Generate 8 Bits of key stream */
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uint8_t Crypto1Byte(void);
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/* Encrypt/Decrypt array */
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void Crypto1ByteArray(uint8_t *Buffer, uint8_t Count);
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void Crypto1ByteArrayWithParity(uint8_t *Buffer, uint8_t Count);
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/* Generate 4 Bits of key stream */
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uint8_t Crypto1Nibble(void);
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/* Execute 'ClockCount' cycles on the PRNG state 'State' */
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void Crypto1PRNG(uint8_t State[4], uint8_t ClockCount);
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/* Encrypts buffer with consideration of parity bits */
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void Crypto1EncryptWithParity(uint8_t *Buffer, uint8_t BitCount);
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/* Encrypts buffer with LFSR feedback within reader nonce and considers parity bits */
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void Crypto1ReaderAuthWithParity(uint8_t PlainReaderAnswerWithParityBits[9]);
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#endif //CRYPTO1_H
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