2 * Copyright (c) 2021, 2023 Omar Polo <op@omarpolo.com>
3 * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org>
4 * Copyright (c) 2008 Reyk Floeter <reyk@openbsd.org>
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 #include <openssl/bn.h>
25 #include <openssl/err.h>
26 #include <openssl/pem.h>
27 #include <openssl/x509_vfy.h>
28 #include <openssl/x509v3.h>
33 strip_path(const char *path, int strip)
38 if ((t = strchr(path, '/')) == NULL) {
39 path = strchr(path, '\0');
50 ends_with(const char *str, const char *sufx)
61 for (j = 0; str[i] != '\0'; i++, j++)
62 if (str[i] != sufx[j])
68 absolutify_path(const char *path)
70 char wd[PATH_MAX], *r;
73 if ((r = strdup(path)) == NULL)
78 if (getcwd(wd, sizeof(wd)) == NULL)
80 if (asprintf(&r, "%s/%s", wd, path) == -1)
86 xstrdup(const char *s)
90 if ((d = strdup(s)) == NULL)
96 xcalloc(size_t nmemb, size_t size)
100 if ((d = calloc(nmemb, size)) == NULL)
106 gen_certificate(const char *hostname, const char *certpath, const char *keypath)
114 const unsigned char *host = (const unsigned char*)hostname;
116 log_info("generating new certificate for %s (it could take a while)",
119 if ((pkey = EVP_PKEY_new()) == NULL)
120 fatalx("couldn't create a new private key");
122 if ((rsa = RSA_new()) == NULL)
123 fatalx("couldn't generate rsa");
125 if ((e = BN_new()) == NULL)
126 fatalx("couldn't allocate a bignum");
128 BN_set_word(e, RSA_F4);
129 if (!RSA_generate_key_ex(rsa, 4096, e, NULL))
130 fatalx("couldn't generate a rsa key");
132 if (!EVP_PKEY_assign_RSA(pkey, rsa))
133 fatalx("couldn't assign the key");
135 if ((x509 = X509_new()) == NULL)
136 fatalx("couldn't generate the X509 certificate");
138 ASN1_INTEGER_set(X509_get_serialNumber(x509), 0);
139 X509_gmtime_adj(X509_get_notBefore(x509), 0);
140 X509_gmtime_adj(X509_get_notAfter(x509), 315360000L); /* 10 years */
141 X509_set_version(x509, 3);
143 if (!X509_set_pubkey(x509, pkey))
144 fatalx("couldn't set the public key");
146 name = X509_get_subject_name(x509);
147 if (!X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC, host, -1, -1, 0))
148 fatalx("couldn't add CN to cert");
149 X509_set_issuer_name(x509, name);
151 if (!X509_sign(x509, pkey, EVP_sha256()))
152 fatalx("couldn't sign the certificate");
154 if ((f = fopen(keypath, "w")) == NULL)
155 fatal("can't open %s", keypath);
156 if (!PEM_write_PrivateKey(f, pkey, NULL, NULL, 0, NULL, NULL))
157 fatalx("couldn't write private key");
160 if ((f = fopen(certpath, "w")) == NULL)
161 fatal("can't open %s", certpath);
162 if (!PEM_write_X509(f, x509))
163 fatalx("couldn't write cert");
170 log_info("certificate successfully generated");
174 load_ca(uint8_t *d, size_t len)
180 if ((store = X509_STORE_new()) == NULL) {
181 log_warnx("%s: X509_STORE_new failed", __func__);
185 if ((in = BIO_new_mem_buf(d, len)) == NULL) {
186 log_warnx("%s: BIO_new_mem_buf failed", __func__);
190 if ((x = PEM_read_bio_X509(in, NULL, NULL, NULL)) == NULL) {
191 log_warnx("%s: PEM_read_bio_X509 failed", __func__);
192 ssl_error("PEM_read_bio_X509");
196 if (X509_check_ca(x) == 0) {
197 ssl_error("X509_check_ca");
201 if (!X509_STORE_add_cert(store, x)) {
202 ssl_error("X509_STORE_add_cert");
211 X509_STORE_free(store);
220 validate_against_ca(X509_STORE *ca, const uint8_t *chain, size_t len)
224 X509_STORE_CTX *ctx = NULL;
227 if ((m = BIO_new_mem_buf(chain, len)) == NULL)
230 if ((client = PEM_read_bio_X509(m, NULL, NULL, NULL)) == NULL)
233 if ((ctx = X509_STORE_CTX_new()) == NULL)
236 if (!X509_STORE_CTX_init(ctx, ca, client, NULL))
239 ret = X509_verify_cert(ctx);
246 X509_STORE_CTX_free(ctx);
251 ssl_error(const char *where)
256 while ((code = ERR_get_error()) != 0) {
257 ERR_error_string_n(code, errbuf, sizeof(errbuf));
258 log_debug("debug: SSL library error: %s: %s", where, errbuf);
263 ssl_pubkey_hash(const uint8_t *buf, size_t len)
265 static const char hex[] = "0123456789abcdef";
270 unsigned char digest[EVP_MAX_MD_SIZE];
271 unsigned int dlen, i;
273 if ((in = BIO_new_mem_buf(buf, len)) == NULL) {
274 log_warnx("%s: BIO_new_mem_buf failed", __func__);
278 if ((x509 = PEM_read_bio_X509(in, NULL, NULL, NULL)) == NULL) {
279 log_warnx("%s: PEM_read_bio_X509 failed", __func__);
280 ssl_error("PEM_read_bio_X509");
284 if ((hash = malloc(TLS_CERT_HASH_SIZE)) == NULL) {
285 log_warn("%s: malloc", __func__);
289 if (X509_pubkey_digest(x509, EVP_sha256(), digest, &dlen) != 1) {
290 log_warnx("%s: X509_pubkey_digest failed", __func__);
291 ssl_error("X509_pubkey_digest");
297 if (TLS_CERT_HASH_SIZE < 2 * dlen + sizeof("SHA256:"))
298 fatalx("%s: hash buffer too small", __func__);
300 off = strlcpy(hash, "SHA256:", TLS_CERT_HASH_SIZE);
301 for (i = 0; i < dlen; ++i) {
302 hash[off++] = hex[(digest[i] >> 4) & 0xf];
303 hash[off++] = hex[digest[i] & 0xf];
315 ssl_load_pkey(const uint8_t *buf, size_t len)
320 if ((in = BIO_new_mem_buf(buf, len)) == NULL) {
321 log_warnx("%s: BIO_new_mem_buf failed", __func__);
325 if ((pkey = PEM_read_bio_PrivateKey(in, NULL, NULL, NULL)) == NULL) {
326 log_warnx("%s: PEM_read_bio_PrivateKey failed", __func__);
327 ssl_error("PEM_read_bio_PrivateKey");
339 h = xcalloc(1, sizeof(*h));
340 TAILQ_INIT(&h->addrs);
341 TAILQ_INIT(&h->locations);
342 TAILQ_INIT(&h->aliases);
343 TAILQ_INIT(&h->proxies);
352 l = xcalloc(1, sizeof(*l));
355 TAILQ_INIT(&l->params);
364 p = xcalloc(1, sizeof(*p));
365 p->protocols = TLS_PROTOCOLS_DEFAULT;