---
name: "ripemd"
section: "3ssl"
platform: "linux"
package: "libssl-doc"
version: "1.0.1t-1+deb8u8"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/ripemd/3ssl"
---

# ripemd(3ssl)

RIPEMD-160 hash function

## NAME

RIPEMD160, RIPEMD160\_Init, RIPEMD160\_Update, RIPEMD160\_Final - RIPEMD-160 hash function

## SYNOPSIS

```
 #include <openssl/ripemd.h>
 unsigned char *RIPEMD160(const unsigned char *d, unsigned long n,
                  unsigned char *md);
 int RIPEMD160_Init(RIPEMD160_CTX *c);
 int RIPEMD160_Update(RIPEMD_CTX *c, const void *data,
                  unsigned long len);
 int RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c);
```

## DESCRIPTION

RIPEMD-160 is a cryptographic hash function with a 160 bit output.

*RIPEMD160()* computes the RIPEMD-160 message digest of the **n** bytes at **d** and places it in **md** (which must have space for RIPEMD160\_DIGEST\_LENGTH == 20 bytes of output). If **md** is NULL, the digest is placed in a static array.

The following functions may be used if the message is not completely stored in memory:

*RIPEMD160\_Init()* initializes a **RIPEMD160\_CTX** structure.

*RIPEMD160\_Update()* can be called repeatedly with chunks of the message to be hashed (**len** bytes at **data**).

*RIPEMD160\_Final()* places the message digest in **md**, which must have space for RIPEMD160\_DIGEST\_LENGTH == 20 bytes of output, and erases the **RIPEMD160\_CTX**.

Applications should use the higher level functions *EVP\_DigestInit*(3) etc. instead of calling the hash functions directly.

## RETURN VALUES

*RIPEMD160()* returns a pointer to the hash value.

*RIPEMD160\_Init()*, *RIPEMD160\_Update()* and *RIPEMD160\_Final()* return 1 for success, 0 otherwise.

## CONFORMING TO

ISO/IEC 10118-3 (draft) (??)

## SEE ALSO

[*sha*(3)](/sha/3.md), *hmac*(3), *EVP\_DigestInit*(3)

## HISTORY

*RIPEMD160()*, *RIPEMD160\_Init()*, *RIPEMD160\_Update()* and *RIPEMD160\_Final()* are available since SSLeay 0.9.0.