+ static u_char digest[EVP_MAX_MD_SIZE];
+ EVP_MD *evp_md = EVP_sha1();
+ EVP_MD_CTX md;
+
+ buffer_init(&b);
+ buffer_put_string(&b, client_version_string, strlen(client_version_string));
+ buffer_put_string(&b, server_version_string, strlen(server_version_string));
+
+ /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */
+ buffer_put_int(&b, ckexinitlen+1);
+ buffer_put_char(&b, SSH2_MSG_KEXINIT);
+ buffer_append(&b, ckexinit, ckexinitlen);
+ buffer_put_int(&b, skexinitlen+1);
+ buffer_put_char(&b, SSH2_MSG_KEXINIT);
+ buffer_append(&b, skexinit, skexinitlen);
+
+ buffer_put_string(&b, serverhostkeyblob, sbloblen);
+ buffer_put_bignum2(&b, client_dh_pub);
+ buffer_put_bignum2(&b, server_dh_pub);
+ buffer_put_bignum2(&b, shared_secret);
+
+#ifdef DEBUG_KEX
+ buffer_dump(&b);
+#endif
+
+ EVP_DigestInit(&md, evp_md);
+ EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b));
+ EVP_DigestFinal(&md, digest, NULL);
+
+ buffer_free(&b);
+
+#ifdef DEBUG_KEX
+ dump_digest(digest, evp_md->md_size);
+#endif
+ return digest;
+}
+
+u_char *
+kex_hash_gex(
+ char *client_version_string,
+ char *server_version_string,
+ char *ckexinit, int ckexinitlen,
+ char *skexinit, int skexinitlen,
+ char *serverhostkeyblob, int sbloblen,
+ int minbits, BIGNUM *prime, BIGNUM *gen,
+ BIGNUM *client_dh_pub,
+ BIGNUM *server_dh_pub,
+ BIGNUM *shared_secret)
+{
+ Buffer b;
+ static u_char digest[EVP_MAX_MD_SIZE];