sha1

gistfile1.c

#include <openssl/evp.h>
#include <openssl/rand.h>

void
sha1(char *buf, int len) {
    EVP_MD_CTX md_ctx;
    unsigned int md_len;
    unsigned char md_value[EVP_MAX_MD_SIZE];

    EVP_MD_CTX_init(&md_ctx);
    EVP_DigestInit_ex(&md_ctx, EVP_sha1(), NULL);
    EVP_DigestUpdate(&md_ctx, buf, len);
    EVP_DigestFinal_ex(&md_ctx, md_value, &md_len);
    EVP_MD_CTX_cleanup(&md_ctx);
}