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 starts_with(const char *str, const char *prefix)
40 for (i = 0; prefix[i] != '\0'; ++i)
41 if (str[i] != prefix[i])
47 ends_with(const char *str, const char *sufx)
58 for (j = 0; str[i] != '\0'; i++, j++)
59 if (str[i] != sufx[j])
69 if ((len = lseek(fd, 0, SEEK_END)) == -1)
71 if (lseek(fd, 0, SEEK_SET) == -1)
77 absolutify_path(const char *path)
82 if ((r = strdup(path)) == NULL)
88 if (asprintf(&r, "%s/%s", wd, path) == -1)
95 xstrdup(const char *s)
99 if ((d = strdup(s)) == NULL)
105 xcalloc(size_t nmemb, size_t size)
109 if ((d = calloc(nmemb, size)) == NULL)
115 gen_certificate(const char *hostname, const char *certpath, const char *keypath)
123 const unsigned char *host = (const unsigned char*)hostname;
125 log_info("generating new certificate for %s (it could take a while)",
128 if ((pkey = EVP_PKEY_new()) == NULL)
129 fatalx("couldn't create a new private key");
131 if ((rsa = RSA_new()) == NULL)
132 fatalx("couldn't generate rsa");
134 if ((e = BN_new()) == NULL)
135 fatalx("couldn't allocate a bignum");
137 BN_set_word(e, RSA_F4);
138 if (!RSA_generate_key_ex(rsa, 4096, e, NULL))
139 fatalx("couldn't generate a rsa key");
141 if (!EVP_PKEY_assign_RSA(pkey, rsa))
142 fatalx("couldn't assign the key");
144 if ((x509 = X509_new()) == NULL)
145 fatalx("couldn't generate the X509 certificate");
147 ASN1_INTEGER_set(X509_get_serialNumber(x509), 0);
148 X509_gmtime_adj(X509_get_notBefore(x509), 0);
149 X509_gmtime_adj(X509_get_notAfter(x509), 315360000L); /* 10 years */
150 X509_set_version(x509, 3);
152 if (!X509_set_pubkey(x509, pkey))
153 fatalx("couldn't set the public key");
155 name = X509_get_subject_name(x509);
156 if (!X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC, host, -1, -1, 0))
157 fatalx("couldn't add CN to cert");
158 X509_set_issuer_name(x509, name);
160 if (!X509_sign(x509, pkey, EVP_sha256()))
161 fatalx("couldn't sign the certificate");
163 if ((f = fopen(keypath, "w")) == NULL)
164 fatal("can't open %s", keypath);
165 if (!PEM_write_PrivateKey(f, pkey, NULL, NULL, 0, NULL, NULL))
166 fatalx("couldn't write private key");
169 if ((f = fopen(certpath, "w")) == NULL)
170 fatal("can't open %s", certpath);
171 if (!PEM_write_X509(f, x509))
172 fatalx("couldn't write cert");
179 log_info("certificate successfully generated");
183 load_ca(uint8_t *d, size_t len)
189 if ((store = X509_STORE_new()) == NULL) {
190 log_warnx("%s: X509_STORE_new failed", __func__);
194 if ((in = BIO_new_mem_buf(d, len)) == NULL) {
195 log_warnx("%s: BIO_new_mem_buf failed", __func__);
199 if ((x = PEM_read_bio_X509(in, NULL, NULL, NULL)) == NULL) {
200 log_warnx("%s: PEM_read_bio_X509 failed", __func__);
201 ssl_error("PEM_read_bio_X509");
205 if (X509_check_ca(x) == 0) {
206 ssl_error("X509_check_ca");
210 if (!X509_STORE_add_cert(store, x)) {
211 ssl_error("X509_STORE_add_cert");
220 X509_STORE_free(store);
229 validate_against_ca(X509_STORE *ca, const uint8_t *chain, size_t len)
233 X509_STORE_CTX *ctx = NULL;
236 if ((m = BIO_new_mem_buf(chain, len)) == NULL)
239 if ((client = PEM_read_bio_X509(m, NULL, NULL, NULL)) == NULL)
242 if ((ctx = X509_STORE_CTX_new()) == NULL)
245 if (!X509_STORE_CTX_init(ctx, ca, client, NULL))
248 ret = X509_verify_cert(ctx);
255 X509_STORE_CTX_free(ctx);
260 ssl_error(const char *where)
265 while ((code = ERR_get_error()) != 0) {
266 ERR_error_string_n(code, errbuf, sizeof(errbuf));
267 log_debug("debug: SSL library error: %s: %s", where, errbuf);
272 ssl_pubkey_hash(const uint8_t *buf, size_t len)
274 static const char hex[] = "0123456789abcdef";
279 unsigned char digest[EVP_MAX_MD_SIZE];
280 unsigned int dlen, i;
282 if ((in = BIO_new_mem_buf(buf, len)) == NULL) {
283 log_warnx("%s: BIO_new_mem_buf failed", __func__);
287 if ((x509 = PEM_read_bio_X509(in, NULL, NULL, NULL)) == NULL) {
288 log_warnx("%s: PEM_read_bio_X509 failed", __func__);
289 ssl_error("PEM_read_bio_X509");
293 if ((hash = malloc(TLS_CERT_HASH_SIZE)) == NULL) {
294 log_warn("%s: malloc", __func__);
298 if (X509_pubkey_digest(x509, EVP_sha256(), digest, &dlen) != 1) {
299 log_warnx("%s: X509_pubkey_digest failed", __func__);
300 ssl_error("X509_pubkey_digest");
306 if (TLS_CERT_HASH_SIZE < 2 * dlen + sizeof("SHA256:"))
307 fatalx("%s: hash buffer too small", __func__);
309 off = strlcpy(hash, "SHA256:", TLS_CERT_HASH_SIZE);
310 for (i = 0; i < dlen; ++i) {
311 hash[off++] = hex[(digest[i] >> 4) & 0xf];
312 hash[off++] = hex[digest[i] & 0xf];
324 ssl_load_pkey(const uint8_t *buf, size_t len)
329 if ((in = BIO_new_mem_buf(buf, len)) == NULL) {
330 log_warnx("%s: BIO_new_mem_buf failed", __func__);
334 if ((pkey = PEM_read_bio_PrivateKey(in, NULL, NULL, NULL)) == NULL) {
335 log_warnx("%s: PEM_read_bio_PrivateKey failed", __func__);
336 ssl_error("PEM_read_bio_PrivateKey");
348 h = xcalloc(1, sizeof(*h));
349 TAILQ_INIT(&h->addrs);
350 TAILQ_INIT(&h->locations);
351 TAILQ_INIT(&h->params);
352 TAILQ_INIT(&h->aliases);
353 TAILQ_INIT(&h->proxies);
362 l = xcalloc(1, sizeof(*l));
373 p = xcalloc(1, sizeof(*p));
374 p->protocols = TLS_PROTOCOLS_DEFAULT;