1 #ifndef LDNS_SHA1_H 2 #define LDNS_SHA1_H 3 4 #ifdef __cplusplus 5 extern "C" { 6 #endif 7 8 #define LDNS_SHA1_BLOCK_LENGTH 64 9 #define LDNS_SHA1_DIGEST_LENGTH 20 10 11 typedef struct { 12 uint32_t state[5]; 13 uint64_t count; 14 unsigned char buffer[LDNS_SHA1_BLOCK_LENGTH]; 15 } ldns_sha1_ctx; 16 17 void ldns_sha1_init(ldns_sha1_ctx * context); 18 void ldns_sha1_transform(uint32_t state[5], const unsigned char buffer[LDNS_SHA1_BLOCK_LENGTH]); 19 void ldns_sha1_update(ldns_sha1_ctx *context, const unsigned char *data, unsigned int len); 20 void ldns_sha1_final(unsigned char digest[LDNS_SHA1_DIGEST_LENGTH], ldns_sha1_ctx *context); 21 22 /** 23 * Convenience function to digest a fixed block of data at once. 24 * 25 * \param[in] data the data to digest 26 * \param[in] data_len the length of data in bytes 27 * \param[out] digest the length of data in bytes 28 * This pointer MUST have LDNS_SHA1_DIGEST_LENGTH bytes 29 * available 30 * \return the SHA1 digest of the given data 31 */ 32 unsigned char *ldns_sha1(unsigned char *data, unsigned int data_len, unsigned char *digest); 33 34 #ifdef __cplusplus 35 } 36 #endif 37 38 #endif /* LDNS_SHA1_H */ 39