diff options
Diffstat (limited to 'modules/ssl/ssl_engine_log.c')
| -rw-r--r-- | modules/ssl/ssl_engine_log.c | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/modules/ssl/ssl_engine_log.c b/modules/ssl/ssl_engine_log.c new file mode 100644 index 0000000..d2f9ed0 --- /dev/null +++ b/modules/ssl/ssl_engine_log.c @@ -0,0 +1,238 @@ +/* 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); + } +} |