128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
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/**
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* \file sha2.h
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*/
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#ifndef XYSSL_SHA2_H
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#define XYSSL_SHA2_H
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/**
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* \brief SHA-256 context structure
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*/
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typedef struct
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{
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unsigned long total[2]; /*!< number of bytes processed */
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unsigned long state[8]; /*!< intermediate digest state */
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unsigned char buffer[64]; /*!< data block being processed */
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unsigned char ipad[64]; /*!< HMAC: inner padding */
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unsigned char opad[64]; /*!< HMAC: outer padding */
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int is224; /*!< 0 => SHA-256, else SHA-224 */
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}
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sha2_context;
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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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* \brief SHA-256 context setup
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*
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* \param ctx context to be initialized
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* \param is224 0 = use SHA256, 1 = use SHA224
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*/
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void sha2_starts( sha2_context *ctx, int is224 );
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/**
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* \brief SHA-256 process buffer
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*
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* \param ctx SHA-256 context
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* \param input buffer holding the data
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* \param ilen length of the input data
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*/
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void sha2_update( sha2_context *ctx, unsigned char *input, int ilen );
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/**
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* \brief SHA-256 final digest
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*
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* \param ctx SHA-256 context
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* \param output SHA-224/256 checksum result
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*/
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void sha2_finish( sha2_context *ctx, unsigned char output[32] );
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/**
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* \brief Output = SHA-256( input buffer )
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*
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* \param input buffer holding the data
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* \param ilen length of the input data
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* \param output SHA-224/256 checksum result
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* \param is224 0 = use SHA256, 1 = use SHA224
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*/
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void sha2( unsigned char *input, int ilen,
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unsigned char output[32], int is224 );
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/**
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* \brief Output = SHA-256( file contents )
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*
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* \param path input file name
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* \param output SHA-224/256 checksum result
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* \param is224 0 = use SHA256, 1 = use SHA224
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*
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* \return 0 if successful, 1 if fopen failed,
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* or 2 if fread failed
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*/
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int sha2_file( char *path, unsigned char output[32], int is224 );
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/**
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* \brief SHA-256 HMAC context setup
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*
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* \param ctx HMAC context to be initialized
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* \param key HMAC secret key
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* \param keylen length of the HMAC key
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* \param is224 0 = use SHA256, 1 = use SHA224
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*/
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void sha2_hmac_starts( sha2_context *ctx, unsigned char *key, int keylen,
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int is224 );
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/**
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* \brief SHA-256 HMAC process buffer
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*
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* \param ctx HMAC context
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* \param input buffer holding the data
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* \param ilen length of the input data
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*/
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void sha2_hmac_update( sha2_context *ctx, unsigned char *input, int ilen );
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/**
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* \brief SHA-256 HMAC final digest
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*
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* \param ctx HMAC context
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* \param output SHA-224/256 HMAC checksum result
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*/
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void sha2_hmac_finish( sha2_context *ctx, unsigned char output[32] );
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/**
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* \brief Output = HMAC-SHA-256( hmac key, input buffer )
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*
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* \param key HMAC secret key
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* \param keylen length of the HMAC key
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* \param input buffer holding the data
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* \param ilen length of the input data
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* \param output HMAC-SHA-224/256 result
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* \param is224 0 = use SHA256, 1 = use SHA224
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*/
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void sha2_hmac( unsigned char *key, int keylen,
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unsigned char *input, int ilen,
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unsigned char output[32], int is224 );
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int sha2_self_test( int verbose );
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#ifdef __cplusplus
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}
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#endif
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#endif /* sha2.h */
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