EVP_sha1 - SHA-1 For EVP
#include <openssl/evp.h> const EVP_MD *EVP_sha1(void);
SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function standardized in NIST FIPS 180-4. The algorithm was designed by the United States National Security Agency and initially published in 1995.
- The SHA-1 algorithm which produces a 160-bit output from a given input.
Developers should be aware of the negative performance implications of calling this function multiple times and should consider using EVP_MD_fetch(3) with EVP_MD-SHA1(7) instead. See "Performance" in crypto(7) for further information.
These functions return a EVP_MD structure that contains the implementation of the message digest. See EVP_MD_meth_new(3) for details of the EVP_MD structure.
NIST FIPS 180-4.
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