/* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* _ _ * _ __ ___ ___ __| | ___ ___| | mod_ssl * | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL * | | | | | | (_) | (_| | \__ \__ \ | * |_| |_| |_|\___/ \__,_|___|___/___/_| * |_____| * ssl_engine_log.c * Logging Facility */ /* ``The difference between a computer industry job and open-source software hacking is about 30 hours a week.'' -- Ralf S. Engelschall */ #include "ssl_private.h" /* _________________________________________________________________ ** ** Logfile Support ** _________________________________________________________________ */ static const struct { const char *cpPattern; const char *cpAnnotation; } ssl_log_annotate[] = { { "*envelope*bad*decrypt*", "wrong pass phrase!?" }, { "*CLIENT_HELLO*unknown*protocol*", "speaking not SSL to HTTPS port!?" }, { "*CLIENT_HELLO*http*request*", "speaking HTTP to HTTPS port!?" }, { "*SSL3_READ_BYTES:sslv3*alert*bad*certificate*", "Subject CN in certificate not server name or identical to CA!?" }, { "*self signed certificate in certificate chain*", "Client certificate signed by CA not known to server?" }, { "*peer did not return a certificate*", "No CAs known to server for verification?" }, { "*no shared cipher*", "Too restrictive SSLCipherSuite or using DSA server certificate?" }, { "*no start line*", "Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?" }, { "*bad password read*", "You entered an incorrect pass phrase!?" }, { "*bad mac decode*", "Browser still remembered details of a re-created server certificate?" }, { NULL, NULL } }; static const char *ssl_log_annotation(const char *error) { int i = 0; while (ssl_log_annotate[i].cpPattern != NULL && ap_strcmp_match(error, ssl_log_annotate[i].cpPattern) != 0) i++; return ssl_log_annotate[i].cpAnnotation; } apr_status_t ssl_die(server_rec *s) { if (s != NULL && s->is_virtual && s->error_fname != NULL) ap_log_error(APLOG_MARK, APLOG_EMERG, 0, NULL, APLOGNO(02311) "Fatal error initialising mod_ssl, exiting. " "See %s for more information", ap_server_root_relative(s->process->pool, s->error_fname)); else ap_log_error(APLOG_MARK, APLOG_EMERG, 0, NULL, APLOGNO(02312) "Fatal error initialising mod_ssl, exiting."); return APR_EGENERAL; } /* * Prints the SSL library error information. */ void ssl_log_ssl_error(const char *file, int line, int level, server_rec *s) { unsigned long e; const char *data; int flags; while ((e = ERR_peek_error_line_data(NULL, NULL, &data, &flags))) { const char *annotation; char err[256]; if (!(flags & ERR_TXT_STRING)) { data = NULL; } ERR_error_string_n(e, err, sizeof err); annotation = ssl_log_annotation(err); ap_log_error(file, line, APLOG_MODULE_INDEX, level, 0, s, "SSL Library Error: %s%s%s%s%s%s", /* %s */ err, /* %s%s%s */ data ? " (" : "", data ? data : "", data ? ")" : "", /* %s%s */ annotation ? " -- " : "", annotation ? annotation : ""); /* Pop the error off the stack: */ ERR_get_error(); } } static void ssl_log_cert_error(const char *file, int line, int level, apr_status_t rv, const server_rec *s, const conn_rec *c, const request_rec *r, apr_pool_t *p, X509 *cert, const char *format, va_list ap) { char buf[HUGE_STRING_LEN]; int msglen, n; char *name; apr_vsnprintf(buf, sizeof buf, format, ap); msglen = strlen(buf); if (cert) { BIO *bio = BIO_new(BIO_s_mem()); if (bio) { /* * Limit the maximum length of the subject and issuer DN strings * in the log message. 300 characters should always be sufficient * for holding both the timestamp, module name, pid etc. stuff * at the beginning of the line and the trailing information about * serial, notbefore and notafter. */ int maxdnlen = (HUGE_STRING_LEN - msglen - 300) / 2; BIO_puts(bio, " [subject: "); name = modssl_X509_NAME_to_string(p, X509_get_subject_name(cert), maxdnlen); if (!strIsEmpty(name)) { BIO_puts(bio, name); } else { BIO_puts(bio, "-empty-"); } BIO_puts(bio, " / issuer: "); name = modssl_X509_NAME_to_string(p, X509_get_issuer_name(cert), maxdnlen); if (!strIsEmpty(name)) { BIO_puts(bio, name); } else { BIO_puts(bio, "-empty-"); } BIO_puts(bio, " / serial: "); if (i2a_ASN1_INTEGER(bio, X509_get_serialNumber(cert)) == -1) BIO_puts(bio, "(ERROR)"); BIO_puts(bio, " / notbefore: "); ASN1_TIME_print(bio, X509_get_notBefore(cert)); BIO_puts(bio, " / notafter: "); ASN1_TIME_print(bio, X509_get_notAfter(cert)); BIO_puts(bio, "]"); n = BIO_read(bio, buf + msglen, sizeof buf - msglen - 1); if (n > 0) buf[msglen + n] = '\0'; BIO_free(bio); } } else { apr_snprintf(buf + msglen, sizeof buf - msglen, " [certificate: -not available-]"); } if (r) { ap_log_rerror(file, line, APLOG_MODULE_INDEX, level, rv, r, "%s", buf); } else if (c) { ap_log_cerror(file, line, APLOG_MODULE_INDEX, level, rv, c, "%s", buf); } else if (s) { ap_log_error(file, line, APLOG_MODULE_INDEX, level, rv, s, "%s", buf); } } /* * Wrappers for ap_log_error/ap_log_cerror/ap_log_rerror which log additional * details of the X509 cert. For ssl_log_xerror, a pool needs to be passed in * as well (for temporary allocation of the cert's subject/issuer name strings, * in the other cases we use the connection and request pool, respectively). */ void ssl_log_xerror(const char *file, int line, int level, apr_status_t rv, apr_pool_t *ptemp, server_rec *s, X509 *cert, const char *fmt, ...) { if (APLOG_IS_LEVEL(s,level)) { va_list ap; va_start(ap, fmt); ssl_log_cert_error(file, line, level, rv, s, NULL, NULL, ptemp, cert, fmt, ap); va_end(ap); } } void ssl_log_cxerror(const char *file, int line, int level, apr_status_t rv, conn_rec *c, X509 *cert, const char *fmt, ...) { if (APLOG_IS_LEVEL(mySrvFromConn(c),level)) { va_list ap; va_start(ap, fmt); ssl_log_cert_error(file, line, level, rv, NULL, c, NULL, c->pool, cert, fmt, ap); va_end(ap); } } void ssl_log_rxerror(const char *file, int line, int level, apr_status_t rv, request_rec *r, X509 *cert, const char *fmt, ...) { if (APLOG_R_IS_LEVEL(r,level)) { va_list ap; va_start(ap, fmt); ssl_log_cert_error(file, line, level, rv, NULL, NULL, r, r->pool, cert, fmt, ap); va_end(ap); } }