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#ifndef LDNS_SHA1_H
#define LDNS_SHA1_H
#ifdef __cplusplus
extern "C" {
#endif
#define LDNS_SHA1_BLOCK_LENGTH 64
#define LDNS_SHA1_DIGEST_LENGTH 20
typedef struct {
uint32_t state[5];
uint64_t count;
unsigned char buffer[LDNS_SHA1_BLOCK_LENGTH];
} ldns_sha1_ctx;
void ldns_sha1_init(ldns_sha1_ctx * context);
void ldns_sha1_transform(uint32_t state[5], const unsigned char buffer[LDNS_SHA1_BLOCK_LENGTH]);
void ldns_sha1_update(ldns_sha1_ctx *context, const unsigned char *data, unsigned int len);
void ldns_sha1_final(unsigned char digest[LDNS_SHA1_DIGEST_LENGTH], ldns_sha1_ctx *context);
/**
* Convenience function to digest a fixed block of data at once.
*
* \param[in] data the data to digest
* \param[in] data_len the length of data in bytes
* \param[out] digest the length of data in bytes
* This pointer MUST have LDNS_SHA1_DIGEST_LENGTH bytes
* available
* \return the SHA1 digest of the given data
*/
unsigned char *ldns_sha1(unsigned char *data, unsigned int data_len, unsigned char *digest);
#ifdef __cplusplus
}
#endif
#endif /* LDNS_SHA1_H */
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