#ifndef _SHA256_H
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#define _SHA256_H
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#define SHA256_SUM_LEN 32
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#define SHA256_DER_LEN 19
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extern const uint8_t sha256_der_prefix[];
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/* Reset watchdog each time we process this many bytes */
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#define CHUNKSZ_SHA256 (64 * 1024)
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typedef struct {
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uint32_t total[2];
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uint32_t state[8];
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uint8_t buffer[64];
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} sha256_context;
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void sha256_starts(sha256_context * ctx);
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void sha256_update(sha256_context *ctx, const uint8_t *input, uint32_t length);
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void sha256_finish(sha256_context * ctx, uint8_t digest[SHA256_SUM_LEN]);
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void sha256_csum_wd(const unsigned char *input, unsigned int ilen,
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unsigned char *output, unsigned int chunk_sz);
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void sha256_csum(const unsigned char *input, unsigned int ilen,
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unsigned char *output);
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#endif /* _SHA256_H */
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