c-libp2p/include/libp2p/crypto/sha1.h

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#ifndef _SHA1_H
#define _SHA1_H
#include <inttypes.h>
#include <string.h>
typedef struct {
uint32_t state[5];
uint32_t count[2];
uint8_t buffer[64];
} SHA1_CTX;
#define SHA1_DIGEST_SIZE 20
void SHA1_Init(SHA1_CTX* context);
void SHA1_Update(SHA1_CTX* context, const uint8_t* data, const size_t len);
void SHA1_Final(SHA1_CTX* context, uint8_t digest[SHA1_DIGEST_SIZE]);
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/***
* Hash the input using SHA1
* @param input the input to hash
* @param input_length the length of the input
* @param output where the output is placed, should be 40 bytes in width
* @returns the number of bytes written, or 0 on error
*/
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int libp2p_crypto_hashing_sha1(const unsigned char* input, size_t input_length, unsigned char* output);
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#endif /* _SHA1_H */