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-rw-r--r--tlscommon.c641
1 files changed, 0 insertions, 641 deletions
diff --git a/tlscommon.c b/tlscommon.c
deleted file mode 100644
index 6d36ebb..0000000
--- a/tlscommon.c
+++ /dev/null
@@ -1,641 +0,0 @@
-/*
- * Copyright (C) 2006-2009 Stig Venaas <venaas@uninett.no>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- */
-
-#if defined(RADPROT_TLS) || defined(RADPROT_DTLS)
-#include <signal.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <string.h>
-#include <unistd.h>
-#include <limits.h>
-#ifdef SYS_SOLARIS9
-#include <fcntl.h>
-#endif
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/select.h>
-#include <ctype.h>
-#include <sys/wait.h>
-#include <arpa/inet.h>
-#include <regex.h>
-#include <libgen.h>
-#include <pthread.h>
-#include <openssl/ssl.h>
-#include <openssl/rand.h>
-#include <openssl/err.h>
-#include <openssl/md5.h>
-#include <openssl/x509v3.h>
-#include "debug.h"
-#include "list.h"
-#include "hash.h"
-#include "util.h"
-#include "hostport.h"
-#include "radsecproxy.h"
-
-static struct hash *tlsconfs = NULL;
-
-static int pem_passwd_cb(char *buf, int size, int rwflag, void *userdata) {
- int pwdlen = strlen(userdata);
- if (rwflag != 0 || pwdlen > size) /* not for decryption or too large */
- return 0;
- memcpy(buf, userdata, pwdlen);
- return pwdlen;
-}
-
-static int verify_cb(int ok, X509_STORE_CTX *ctx) {
- char *buf = NULL;
- X509 *err_cert;
- int err, depth;
-
- err_cert = X509_STORE_CTX_get_current_cert(ctx);
- err = X509_STORE_CTX_get_error(ctx);
- depth = X509_STORE_CTX_get_error_depth(ctx);
-
- if (depth > MAX_CERT_DEPTH) {
- ok = 0;
- err = X509_V_ERR_CERT_CHAIN_TOO_LONG;
- X509_STORE_CTX_set_error(ctx, err);
- }
-
- if (!ok) {
- if (err_cert)
- buf = X509_NAME_oneline(X509_get_subject_name(err_cert), NULL, 0);
- debug(DBG_WARN, "verify error: num=%d:%s:depth=%d:%s", err, X509_verify_cert_error_string(err), depth, buf ? buf : "");
- free(buf);
- buf = NULL;
-
- switch (err) {
- case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
- if (err_cert) {
- buf = X509_NAME_oneline(X509_get_issuer_name(err_cert), NULL, 0);
- if (buf) {
- debug(DBG_WARN, "\tIssuer=%s", buf);
- free(buf);
- buf = NULL;
- }
- }
- break;
- case X509_V_ERR_CERT_NOT_YET_VALID:
- case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
- debug(DBG_WARN, "\tCertificate not yet valid");
- break;
- case X509_V_ERR_CERT_HAS_EXPIRED:
- debug(DBG_WARN, "Certificate has expired");
- break;
- case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
- debug(DBG_WARN, "Certificate no longer valid (after notAfter)");
- break;
- case X509_V_ERR_NO_EXPLICIT_POLICY:
- debug(DBG_WARN, "No Explicit Certificate Policy");
- break;
- }
- }
-#ifdef DEBUG
- printf("certificate verify returns %d\n", ok);
-#endif
- return ok;
-}
-
-#ifdef DEBUG
-static void ssl_info_callback(const SSL *ssl, int where, int ret) {
- const char *s;
- int w;
-
- w = where & ~SSL_ST_MASK;
-
- if (w & SSL_ST_CONNECT)
- s = "SSL_connect";
- else if (w & SSL_ST_ACCEPT)
- s = "SSL_accept";
- else
- s = "undefined";
-
- if (where & SSL_CB_LOOP)
- debug(DBG_DBG, "%s:%s\n", s, SSL_state_string_long(ssl));
- else if (where & SSL_CB_ALERT) {
- s = (where & SSL_CB_READ) ? "read" : "write";
- debug(DBG_DBG, "SSL3 alert %s:%s:%s\n", s, SSL_alert_type_string_long(ret), SSL_alert_desc_string_long(ret));
- }
- else if (where & SSL_CB_EXIT) {
- if (ret == 0)
- debug(DBG_DBG, "%s:failed in %s\n", s, SSL_state_string_long(ssl));
- else if (ret < 0)
- debug(DBG_DBG, "%s:error in %s\n", s, SSL_state_string_long(ssl));
- }
-}
-#endif
-
-static X509_VERIFY_PARAM *createverifyparams(char **poids) {
- X509_VERIFY_PARAM *pm;
- ASN1_OBJECT *pobject;
- int i;
-
- pm = X509_VERIFY_PARAM_new();
- if (!pm)
- return NULL;
-
- for (i = 0; poids[i]; i++) {
- pobject = OBJ_txt2obj(poids[i], 0);
- if (!pobject) {
- X509_VERIFY_PARAM_free(pm);
- return NULL;
- }
- X509_VERIFY_PARAM_add0_policy(pm, pobject);
- }
-
- X509_VERIFY_PARAM_set_flags(pm, X509_V_FLAG_POLICY_CHECK | X509_V_FLAG_EXPLICIT_POLICY);
- return pm;
-}
-
-static int tlsaddcacrl(SSL_CTX *ctx, struct tls *conf) {
- STACK_OF(X509_NAME) *calist;
- X509_STORE *x509_s;
- unsigned long error;
-
- if (!SSL_CTX_load_verify_locations(ctx, conf->cacertfile, conf->cacertpath)) {
- while ((error = ERR_get_error()))
- debug(DBG_ERR, "SSL: %s", ERR_error_string(error, NULL));
- debug(DBG_ERR, "tlsaddcacrl: Error updating TLS context %s", conf->name);
- return 0;
- }
-
- calist = conf->cacertfile ? SSL_load_client_CA_file(conf->cacertfile) : NULL;
- if (!conf->cacertfile || calist) {
- if (conf->cacertpath) {
- if (!calist)
- calist = sk_X509_NAME_new_null();
- if (!SSL_add_dir_cert_subjects_to_stack(calist, conf->cacertpath)) {
- sk_X509_NAME_free(calist);
- calist = NULL;
- }
- }
- }
- if (!calist) {
- while ((error = ERR_get_error()))
- debug(DBG_ERR, "SSL: %s", ERR_error_string(error, NULL));
- debug(DBG_ERR, "tlsaddcacrl: Error adding CA subjects in TLS context %s", conf->name);
- return 0;
- }
- ERR_clear_error(); /* add_dir_cert_subj returns errors on success */
- SSL_CTX_set_client_CA_list(ctx, calist);
-
- SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, verify_cb);
- SSL_CTX_set_verify_depth(ctx, MAX_CERT_DEPTH + 1);
-
- if (conf->crlcheck || conf->vpm) {
- x509_s = SSL_CTX_get_cert_store(ctx);
- if (conf->crlcheck)
- X509_STORE_set_flags(x509_s, X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL);
- if (conf->vpm)
- X509_STORE_set1_param(x509_s, conf->vpm);
- }
-
- debug(DBG_DBG, "tlsaddcacrl: updated TLS context %s", conf->name);
- return 1;
-}
-
-static SSL_CTX *tlscreatectx(uint8_t type, struct tls *conf) {
- SSL_CTX *ctx = NULL;
- unsigned long error;
-
- switch (type) {
-#ifdef RADPROT_TLS
- case RAD_TLS:
- ctx = SSL_CTX_new(TLSv1_method());
-#ifdef DEBUG
- SSL_CTX_set_info_callback(ctx, ssl_info_callback);
-#endif
- break;
-#endif
-#ifdef RADPROT_DTLS
- case RAD_DTLS:
- ctx = SSL_CTX_new(DTLSv1_method());
-#ifdef DEBUG
- SSL_CTX_set_info_callback(ctx, ssl_info_callback);
-#endif
- SSL_CTX_set_read_ahead(ctx, 1);
- break;
-#endif
- }
- if (!ctx) {
- debug(DBG_ERR, "tlscreatectx: Error initialising SSL/TLS in TLS context %s", conf->name);
- return NULL;
- }
-
- if (conf->certkeypwd) {
- SSL_CTX_set_default_passwd_cb_userdata(ctx, conf->certkeypwd);
- SSL_CTX_set_default_passwd_cb(ctx, pem_passwd_cb);
- }
- if (!SSL_CTX_use_certificate_chain_file(ctx, conf->certfile) ||
- !SSL_CTX_use_PrivateKey_file(ctx, conf->certkeyfile, SSL_FILETYPE_PEM) ||
- !SSL_CTX_check_private_key(ctx)) {
- while ((error = ERR_get_error()))
- debug(DBG_ERR, "SSL: %s", ERR_error_string(error, NULL));
- debug(DBG_ERR, "tlscreatectx: Error initialising SSL/TLS in TLS context %s", conf->name);
- SSL_CTX_free(ctx);
- return NULL;
- }
-
- if (conf->policyoids) {
- if (!conf->vpm) {
- conf->vpm = createverifyparams(conf->policyoids);
- if (!conf->vpm) {
- debug(DBG_ERR, "tlscreatectx: Failed to add policyOIDs in TLS context %s", conf->name);
- SSL_CTX_free(ctx);
- return NULL;
- }
- }
- }
-
- if (!tlsaddcacrl(ctx, conf)) {
- if (conf->vpm) {
- X509_VERIFY_PARAM_free(conf->vpm);
- conf->vpm = NULL;
- }
- SSL_CTX_free(ctx);
- return NULL;
- }
-
- debug(DBG_DBG, "tlscreatectx: created TLS context %s", conf->name);
- return ctx;
-}
-
-struct tls *tlsgettls(char *alt1, char *alt2) {
- struct tls *t;
-
- t = hash_read(tlsconfs, alt1, strlen(alt1));
- if (!t)
- t = hash_read(tlsconfs, alt2, strlen(alt2));
- return t;
-}
-
-SSL_CTX *tlsgetctx(uint8_t type, struct tls *t) {
- struct timeval now;
-
- if (!t)
- return NULL;
- gettimeofday(&now, NULL);
-
- switch (type) {
-#ifdef RADPROT_TLS
- case RAD_TLS:
- if (t->tlsexpiry && t->tlsctx) {
- if (t->tlsexpiry < now.tv_sec) {
- t->tlsexpiry = now.tv_sec + t->cacheexpiry;
- tlsaddcacrl(t->tlsctx, t);
- }
- }
- if (!t->tlsctx) {
- t->tlsctx = tlscreatectx(RAD_TLS, t);
- if (t->cacheexpiry)
- t->tlsexpiry = now.tv_sec + t->cacheexpiry;
- }
- return t->tlsctx;
-#endif
-#ifdef RADPROT_DTLS
- case RAD_DTLS:
- if (t->dtlsexpiry && t->dtlsctx) {
- if (t->dtlsexpiry < now.tv_sec) {
- t->dtlsexpiry = now.tv_sec + t->cacheexpiry;
- tlsaddcacrl(t->dtlsctx, t);
- }
- }
- if (!t->dtlsctx) {
- t->dtlsctx = tlscreatectx(RAD_DTLS, t);
- if (t->cacheexpiry)
- t->dtlsexpiry = now.tv_sec + t->cacheexpiry;
- }
- return t->dtlsctx;
-#endif
- }
- return NULL;
-}
-
-X509 *verifytlscert(SSL *ssl) {
- X509 *cert;
- unsigned long error;
-
- if (SSL_get_verify_result(ssl) != X509_V_OK) {
- debug(DBG_ERR, "verifytlscert: basic validation failed");
- while ((error = ERR_get_error()))
- debug(DBG_ERR, "verifytlscert: TLS: %s", ERR_error_string(error, NULL));
- return NULL;
- }
-
- cert = SSL_get_peer_certificate(ssl);
- if (!cert)
- debug(DBG_ERR, "verifytlscert: failed to obtain certificate");
- return cert;
-}
-
-static int subjectaltnameaddr(X509 *cert, int family, struct in6_addr *addr) {
- int loc, i, l, n, r = 0;
- char *v;
- X509_EXTENSION *ex;
- STACK_OF(GENERAL_NAME) *alt;
- GENERAL_NAME *gn;
-
- debug(DBG_DBG, "subjectaltnameaddr");
-
- loc = X509_get_ext_by_NID(cert, NID_subject_alt_name, -1);
- if (loc < 0)
- return r;
-
- ex = X509_get_ext(cert, loc);
- alt = X509V3_EXT_d2i(ex);
- if (!alt)
- return r;
-
- n = sk_GENERAL_NAME_num(alt);
- for (i = 0; i < n; i++) {
- gn = sk_GENERAL_NAME_value(alt, i);
- if (gn->type != GEN_IPADD)
- continue;
- r = -1;
- v = (char *)ASN1_STRING_data(gn->d.ia5);
- l = ASN1_STRING_length(gn->d.ia5);
- if (((family == AF_INET && l == sizeof(struct in_addr)) || (family == AF_INET6 && l == sizeof(struct in6_addr)))
- && !memcmp(v, &addr, l)) {
- r = 1;
- break;
- }
- }
- GENERAL_NAMES_free(alt);
- return r;
-}
-
-static int subjectaltnameregexp(X509 *cert, int type, char *exact, regex_t *regex) {
- int loc, i, l, n, r = 0;
- char *s, *v;
- X509_EXTENSION *ex;
- STACK_OF(GENERAL_NAME) *alt;
- GENERAL_NAME *gn;
-
- debug(DBG_DBG, "subjectaltnameregexp");
-
- loc = X509_get_ext_by_NID(cert, NID_subject_alt_name, -1);
- if (loc < 0)
- return r;
-
- ex = X509_get_ext(cert, loc);
- alt = X509V3_EXT_d2i(ex);
- if (!alt)
- return r;
-
- n = sk_GENERAL_NAME_num(alt);
- for (i = 0; i < n; i++) {
- gn = sk_GENERAL_NAME_value(alt, i);
- if (gn->type != type)
- continue;
- r = -1;
- v = (char *)ASN1_STRING_data(gn->d.ia5);
- l = ASN1_STRING_length(gn->d.ia5);
- if (l <= 0)
- continue;
-#ifdef DEBUG
- printfchars(NULL, gn->type == GEN_DNS ? "dns" : "uri", NULL, v, l);
-#endif
- if (exact) {
- if (memcmp(v, exact, l))
- continue;
- } else {
- s = stringcopy((char *)v, l);
- if (!s) {
- debug(DBG_ERR, "malloc failed");
- continue;
- }
- if (regexec(regex, s, 0, NULL, 0)) {
- free(s);
- continue;
- }
- free(s);
- }
- r = 1;
- break;
- }
- GENERAL_NAMES_free(alt);
- return r;
-}
-
-static int cnregexp(X509 *cert, char *exact, regex_t *regex) {
- int loc, l;
- char *v, *s;
- X509_NAME *nm;
- X509_NAME_ENTRY *e;
- ASN1_STRING *t;
-
- nm = X509_get_subject_name(cert);
- loc = -1;
- for (;;) {
- loc = X509_NAME_get_index_by_NID(nm, NID_commonName, loc);
- if (loc == -1)
- break;
- e = X509_NAME_get_entry(nm, loc);
- t = X509_NAME_ENTRY_get_data(e);
- v = (char *) ASN1_STRING_data(t);
- l = ASN1_STRING_length(t);
- if (l < 0)
- continue;
- if (exact) {
- if (l == strlen(exact) && !strncasecmp(exact, v, l))
- return 1;
- } else {
- s = stringcopy((char *)v, l);
- if (!s) {
- debug(DBG_ERR, "malloc failed");
- continue;
- }
- if (regexec(regex, s, 0, NULL, 0)) {
- free(s);
- continue;
- }
- free(s);
- return 1;
- }
- }
- return 0;
-}
-
-/* this is a bit sloppy, should not always accept match to any */
-int certnamecheck(X509 *cert, struct list *hostports) {
- struct list_node *entry;
- struct hostportres *hp;
- int r;
- uint8_t type = 0; /* 0 for DNS, AF_INET for IPv4, AF_INET6 for IPv6 */
- struct in6_addr addr;
-
- for (entry = list_first(hostports); entry; entry = list_next(entry)) {
- hp = (struct hostportres *)entry->data;
- if (hp->prefixlen != 255) {
- /* we disable the check for prefixes */
- return 1;
- }
- if (inet_pton(AF_INET, hp->host, &addr))
- type = AF_INET;
- else if (inet_pton(AF_INET6, hp->host, &addr))
- type = AF_INET6;
- else
- type = 0;
-
- r = type ? subjectaltnameaddr(cert, type, &addr) : subjectaltnameregexp(cert, GEN_DNS, hp->host, NULL);
- if (r) {
- if (r > 0) {
- debug(DBG_DBG, "certnamecheck: Found subjectaltname matching %s %s", type ? "address" : "host", hp->host);
- return 1;
- }
- debug(DBG_WARN, "certnamecheck: No subjectaltname matching %s %s", type ? "address" : "host", hp->host);
- } else {
- if (cnregexp(cert, hp->host, NULL)) {
- debug(DBG_DBG, "certnamecheck: Found cn matching host %s", hp->host);
- return 1;
- }
- debug(DBG_WARN, "certnamecheck: cn not matching host %s", hp->host);
- }
- }
- return 0;
-}
-
-int verifyconfcert(X509 *cert, struct clsrvconf *conf) {
- if (conf->certnamecheck) {
- if (!certnamecheck(cert, conf->hostports)) {
- debug(DBG_WARN, "verifyconfcert: certificate name check failed");
- return 0;
- }
- debug(DBG_WARN, "verifyconfcert: certificate name check ok");
- }
- if (conf->certcnregex) {
- if (cnregexp(cert, NULL, conf->certcnregex) < 1) {
- debug(DBG_WARN, "verifyconfcert: CN not matching regex");
- return 0;
- }
- debug(DBG_DBG, "verifyconfcert: CN matching regex");
- }
- if (conf->certuriregex) {
- if (subjectaltnameregexp(cert, GEN_URI, NULL, conf->certuriregex) < 1) {
- debug(DBG_WARN, "verifyconfcert: subjectaltname URI not matching regex");
- return 0;
- }
- debug(DBG_DBG, "verifyconfcert: subjectaltname URI matching regex");
- }
- return 1;
-}
-
-int conftls_cb(struct gconffile **cf, void *arg, char *block, char *opt, char *val) {
- struct tls *conf;
- long int expiry = LONG_MIN;
-
- debug(DBG_DBG, "conftls_cb called for %s", block);
-
- conf = malloc(sizeof(struct tls));
- if (!conf) {
- debug(DBG_ERR, "conftls_cb: malloc failed");
- return 0;
- }
- memset(conf, 0, sizeof(struct tls));
-
- if (!getgenericconfig(cf, block,
- "CACertificateFile", CONF_STR, &conf->cacertfile,
- "CACertificatePath", CONF_STR, &conf->cacertpath,
- "CertificateFile", CONF_STR, &conf->certfile,
- "CertificateKeyFile", CONF_STR, &conf->certkeyfile,
- "CertificateKeyPassword", CONF_STR, &conf->certkeypwd,
- "CacheExpiry", CONF_LINT, &expiry,
- "CRLCheck", CONF_BLN, &conf->crlcheck,
- "PolicyOID", CONF_MSTR, &conf->policyoids,
- NULL
- )) {
- debug(DBG_ERR, "conftls_cb: configuration error in block %s", val);
- goto errexit;
- }
- if (!conf->certfile || !conf->certkeyfile) {
- debug(DBG_ERR, "conftls_cb: TLSCertificateFile and TLSCertificateKeyFile must be specified in block %s", val);
- goto errexit;
- }
- if (!conf->cacertfile && !conf->cacertpath) {
- debug(DBG_ERR, "conftls_cb: CA Certificate file or path need to be specified in block %s", val);
- goto errexit;
- }
- if (expiry != LONG_MIN) {
- if (expiry < 0) {
- debug(DBG_ERR, "error in block %s, value of option CacheExpiry is %ld, may not be negative", val, expiry);
- goto errexit;
- }
- conf->cacheexpiry = expiry;
- }
-
- conf->name = stringcopy(val, 0);
- if (!conf->name) {
- debug(DBG_ERR, "conftls_cb: malloc failed");
- goto errexit;
- }
-
- if (!tlsconfs)
- tlsconfs = hash_create();
- if (!hash_insert(tlsconfs, val, strlen(val), conf)) {
- debug(DBG_ERR, "conftls_cb: malloc failed");
- goto errexit;
- }
- if (!tlsgetctx(RAD_TLS, conf))
- debug(DBG_ERR, "conftls_cb: error creating ctx for TLS block %s", val);
- debug(DBG_DBG, "conftls_cb: added TLS block %s", val);
- return 1;
-
-errexit:
- free(conf->cacertfile);
- free(conf->cacertpath);
- free(conf->certfile);
- free(conf->certkeyfile);
- free(conf->certkeypwd);
- freegconfmstr(conf->policyoids);
- free(conf);
- return 0;
-}
-
-int addmatchcertattr(struct clsrvconf *conf) {
- char *v;
- regex_t **r;
-
- if (!strncasecmp(conf->matchcertattr, "CN:/", 4)) {
- r = &conf->certcnregex;
- v = conf->matchcertattr + 4;
- } else if (!strncasecmp(conf->matchcertattr, "SubjectAltName:URI:/", 20)) {
- r = &conf->certuriregex;
- v = conf->matchcertattr + 20;
- } else
- return 0;
- if (!*v)
- return 0;
- /* regexp, remove optional trailing / if present */
- if (v[strlen(v) - 1] == '/')
- v[strlen(v) - 1] = '\0';
- if (!*v)
- return 0;
-
- *r = malloc(sizeof(regex_t));
- if (!*r) {
- debug(DBG_ERR, "malloc failed");
- return 0;
- }
- if (regcomp(*r, v, REG_EXTENDED | REG_ICASE | REG_NOSUB)) {
- free(*r);
- *r = NULL;
- debug(DBG_ERR, "failed to compile regular expression %s", v);
- return 0;
- }
- return 1;
-}
-#else
-/* Just to makes file non-empty, should rather avoid compiling this file when not needed */
-static void tlsdummy() {
-}
-#endif
-
-/* Local Variables: */
-/* c-file-style: "stroustrup" */
-/* End: */
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 05:04:37 +0000