char* only_fips_valid_macs(const char* names) { Buffer b; char *fips_names, *cp, *p; if (names == NULL || *names == '\0') return NULL; buffer_init(&b); /* default set in myproposals.h */ cp = xstrdup(names); for (p = strsep(&cp, MAC_SEP); p && *p != '\0'; p = strsep(&cp, MAC_SEP) ) { if (mac_setup(NULL, p) < 0) continue; if (buffer_len(&b) > 0) buffer_append(&b, ",", 1); buffer_append(&b, p, strlen(p)); } buffer_append(&b, "\0", 1); fips_names = xstrdup(buffer_ptr(&b)); buffer_free(&b); debug3("%s: fips_macs: [%s]", __func__, fips_names); return fips_names; }
/* Export key state after authentication */ Newkeys * mm_newkeys_from_blob(u_char *blob, int blen) { Buffer b; u_int len; Newkeys *newkey = NULL; Enc *enc; Mac *mac; Comp *comp; debug3("%s: %p(%d)", __func__, blob, blen); #ifdef DEBUG_PK dump_base64(stderr, blob, blen); #endif buffer_init(&b); buffer_append(&b, blob, blen); newkey = xmalloc(sizeof(*newkey)); enc = &newkey->enc; mac = &newkey->mac; comp = &newkey->comp; /* Enc structure */ enc->name = buffer_get_string(&b, NULL); buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); enc->enabled = buffer_get_int(&b); enc->block_size = buffer_get_int(&b); enc->key = buffer_get_string(&b, &enc->key_len); enc->iv = buffer_get_string(&b, &len); if (len != enc->block_size) fatal("%s: bad ivlen: expected %u != %u", __func__, enc->block_size, len); if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) fatal("%s: bad cipher name %s or pointer %p", __func__, enc->name, enc->cipher); /* Mac structure */ mac->name = buffer_get_string(&b, NULL); if (mac->name == NULL || mac_setup(mac, mac->name) == -1) fatal("%s: can not setup mac %s", __func__, mac->name); mac->enabled = buffer_get_int(&b); mac->key = buffer_get_string(&b, &len); if (len > mac->key_len) fatal("%s: bad mac key length: %u > %d", __func__, len, mac->key_len); mac->key_len = len; /* Comp structure */ comp->type = buffer_get_int(&b); comp->enabled = buffer_get_int(&b); comp->name = buffer_get_string(&b, NULL); len = buffer_len(&b); if (len != 0) error("newkeys_from_blob: remaining bytes in blob %u", len); buffer_free(&b); return (newkey); }
static void choose_mac(Mac *mac, char *client, char *server) { char *name = match_list(client, server, NULL); if (name == NULL) fatal("no matching mac found: client %s server %s", client, server); if (mac_setup(mac, name) < 0) fatal("unsupported mac %s", name); /* truncate the key */ if (datafellows & SSH_BUG_HMAC) mac->key_len = 16; mac->name = name; mac->key = NULL; mac->enabled = 0; }
static int choose_mac(struct ssh *ssh, struct sshmac *mac, char *client, char *server) { char *name = match_list(client, server, NULL); if (name == NULL) return SSH_ERR_NO_MAC_ALG_MATCH; if (mac_setup(mac, name) < 0) return SSH_ERR_INTERNAL_ERROR; /* truncate the key */ if (ssh->compat & SSH_BUG_HMAC) mac->key_len = 16; mac->name = name; mac->key = NULL; mac->enabled = 0; return 0; }
int mac_valid(const char *names) { char *maclist, *cp, *p; if (names == NULL || strcmp(names, "") == 0) return 0; if ((maclist = cp = strdup(names)) == NULL) return 0; for ((p = strsep(&cp, MAC_SEP)); p && *p != '\0'; (p = strsep(&cp, MAC_SEP))) { if (mac_setup(NULL, p) < 0) { free(maclist); return 0; } } free(maclist); return 1; }
int mac_valid(const char *names) { char *maclist, *cp, *p; if (names == NULL || strcmp(names, "") == 0) return (0); maclist = cp = xstrdup(names); for ((p = strsep(&cp, MAC_SEP)); p && *p != '\0'; (p = strsep(&cp, MAC_SEP))) { if (mac_setup(NULL, p) < 0) { debug("bad mac %s [%s]", p, names); free(maclist); return (0); } } debug3("macs ok: [%s]", names); free(maclist); return (1); }