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RIPEMD160_Init.3ossl - Man Page

RIPEMD-160 hash function


 #include <openssl/ripemd.h>

The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros(7):

 unsigned char *RIPEMD160(const unsigned char *d, unsigned long n,
                          unsigned char *md);

 int RIPEMD160_Init(RIPEMD160_CTX *c);
 int RIPEMD160_Update(RIPEMD160_CTX *c, const void *data, unsigned long len);
 int RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c);


All of the functions described on this page are deprecated. Applications should instead use EVP_DigestInit_ex(3), EVP_DigestUpdate(3) and EVP_DigestFinal_ex(3).

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.

Return Values

RIPEMD160() returns a pointer to the hash value.

RIPEMD160_Init(), RIPEMD160_Update() and RIPEMD160_Final() return 1 for success, 0 otherwise.


Applications should use the higher level functions EVP_DigestInit(3) etc. instead of calling these functions directly.

Conforming to

ISO/IEC 10118-3:2016 Dedicated Hash-Function 1 (RIPEMD-160).

See Also



All of these functions were deprecated in OpenSSL 3.0.

Referenced By

The man pages RIPEMD160.3ossl(3), RIPEMD160_Final.3ossl(3) and RIPEMD160_Update.3ossl(3) are aliases of RIPEMD160_Init.3ossl(3).

2024-07-09 3.2.2 OpenSSL