| /* _ _ |
| ** _ __ ___ ___ __| | ___ ___| | mod_ssl |
| ** | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL |
| ** | | | | | | (_) | (_| | \__ \__ \ | www.modssl.org |
| ** |_| |_| |_|\___/ \__,_|___|___/___/_| ftp.modssl.org |
| ** |_____| |
| ** ssl_util_ssl.c |
| ** Additional Utility Functions for OpenSSL |
| */ |
| |
| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2002 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| */ |
| |
| #include "mod_ssl.h" |
| |
| /* _________________________________________________________________ |
| ** |
| ** Additional High-Level Functions for OpenSSL |
| ** _________________________________________________________________ |
| */ |
| |
| /* we initialize this index at startup time |
| * and never write to it at request time, |
| * so this static is thread safe. |
| * also note that OpenSSL increments at static variable when |
| * SSL_get_ex_new_index() is called, so we _must_ do this at startup. |
| */ |
| static int SSL_app_data2_idx = -1; |
| |
| void SSL_init_app_data2_idx(void) |
| { |
| int i; |
| |
| if (SSL_app_data2_idx > -1) { |
| return; |
| } |
| |
| /* we _do_ need to call this twice */ |
| for (i=0; i<=1; i++) { |
| SSL_app_data2_idx = |
| SSL_get_ex_new_index(0, |
| "Second Application Data for SSL", |
| NULL, NULL, NULL); |
| } |
| } |
| |
| void *SSL_get_app_data2(SSL *ssl) |
| { |
| return (void *)SSL_get_ex_data(ssl, SSL_app_data2_idx); |
| } |
| |
| void SSL_set_app_data2(SSL *ssl, void *arg) |
| { |
| SSL_set_ex_data(ssl, SSL_app_data2_idx, (char *)arg); |
| return; |
| } |
| |
| /* _________________________________________________________________ |
| ** |
| ** High-Level Certificate / Private Key Loading |
| ** _________________________________________________________________ |
| */ |
| |
| X509 *SSL_read_X509(char* filename, X509 **x509, int (*cb)(char*,int,int,void*)) |
| { |
| X509 *rc; |
| BIO *bioS; |
| BIO *bioF; |
| |
| /* 1. try PEM (= DER+Base64+headers) */ |
| if ((bioS=BIO_new_file(filename, "r")) == NULL) |
| return NULL; |
| rc=PEM_read_bio_X509 (bioS, x509, cb, NULL); |
| BIO_free(bioS); |
| |
| if (rc == NULL) { |
| /* 2. try DER+Base64 */ |
| if ((bioS=BIO_new_file(filename, "r")) == NULL) |
| return NULL; |
| |
| if ((bioF = BIO_new(BIO_f_base64())) == NULL) { |
| BIO_free(bioS); |
| return NULL; |
| } |
| bioS = BIO_push(bioF, bioS); |
| rc = d2i_X509_bio(bioS, NULL); |
| BIO_free_all(bioS); |
| if (rc == NULL) { |
| /* 3. try plain DER */ |
| if ((bioS=BIO_new_file(filename, "r")) == NULL) |
| return NULL; |
| rc = d2i_X509_bio(bioS, NULL); |
| BIO_free(bioS); |
| } |
| } |
| if (rc != NULL && x509 != NULL) { |
| if (*x509 != NULL) |
| X509_free(*x509); |
| *x509 = rc; |
| } |
| return rc; |
| } |
| |
| #if SSL_LIBRARY_VERSION <= 0x00904100 |
| static EVP_PKEY *d2i_PrivateKey_bio(BIO *bio, EVP_PKEY **key) |
| { |
| return ((EVP_PKEY *)ASN1_d2i_bio( |
| (char *(*)())EVP_PKEY_new, |
| (char *(*)())d2i_PrivateKey, |
| (bio), (unsigned char **)(key))); |
| } |
| #endif |
| |
| EVP_PKEY *SSL_read_PrivateKey(char* filename, EVP_PKEY **key, int (*cb)(char*,int,int,void*), void *s) |
| { |
| EVP_PKEY *rc; |
| BIO *bioS; |
| BIO *bioF; |
| |
| /* 1. try PEM (= DER+Base64+headers) */ |
| if ((bioS=BIO_new_file(filename, "r")) == NULL) |
| return NULL; |
| rc = PEM_read_bio_PrivateKey(bioS, key, cb, s); |
| BIO_free(bioS); |
| |
| if (rc == NULL) { |
| /* 2. try DER+Base64 */ |
| if ( (bioS = BIO_new_file(filename, "r")) == NULL ) |
| return NULL; |
| |
| if ((bioF = BIO_new(BIO_f_base64())) == NULL) { |
| BIO_free(bioS); |
| return NULL; |
| } |
| bioS = BIO_push(bioF, bioS); |
| rc = d2i_PrivateKey_bio(bioS, NULL); |
| BIO_free_all(bioS); |
| if (rc == NULL) { |
| /* 3. try plain DER */ |
| if ( (bioS = BIO_new_file(filename, "r")) == NULL ) |
| return NULL; |
| rc = d2i_PrivateKey_bio(bioS, NULL); |
| BIO_free(bioS); |
| } |
| } |
| if (rc != NULL && key != NULL) { |
| if (*key != NULL) |
| EVP_PKEY_free(*key); |
| *key = rc; |
| } |
| return rc; |
| } |
| |
| /* _________________________________________________________________ |
| ** |
| ** Smart shutdown |
| ** _________________________________________________________________ |
| */ |
| |
| int SSL_smart_shutdown(SSL *ssl) |
| { |
| int i; |
| int rc; |
| |
| /* |
| * Repeat the calls, because SSL_shutdown internally dispatches through a |
| * little state machine. Usually only one or two interation should be |
| * needed, so we restrict the total number of restrictions in order to |
| * avoid process hangs in case the client played bad with the socket |
| * connection and OpenSSL cannot recognize it. |
| */ |
| rc = 0; |
| for (i = 0; i < 4 /* max 2x pending + 2x data = 4 */; i++) { |
| if ((rc = SSL_shutdown(ssl))) |
| break; |
| } |
| return rc; |
| } |
| |
| /* _________________________________________________________________ |
| ** |
| ** Certificate Revocation List (CRL) Storage |
| ** _________________________________________________________________ |
| */ |
| |
| X509_STORE *SSL_X509_STORE_create(char *cpFile, char *cpPath) |
| { |
| X509_STORE *pStore; |
| X509_LOOKUP *pLookup; |
| |
| if (cpFile == NULL && cpPath == NULL) |
| return NULL; |
| if ((pStore = X509_STORE_new()) == NULL) |
| return NULL; |
| if (cpFile != NULL) { |
| if ((pLookup = X509_STORE_add_lookup(pStore, X509_LOOKUP_file())) == NULL) { |
| X509_STORE_free(pStore); |
| return NULL; |
| } |
| X509_LOOKUP_load_file(pLookup, cpFile, X509_FILETYPE_PEM); |
| } |
| if (cpPath != NULL) { |
| if ((pLookup = X509_STORE_add_lookup(pStore, X509_LOOKUP_hash_dir())) == NULL) { |
| X509_STORE_free(pStore); |
| return NULL; |
| } |
| X509_LOOKUP_add_dir(pLookup, cpPath, X509_FILETYPE_PEM); |
| } |
| return pStore; |
| } |
| |
| int SSL_X509_STORE_lookup(X509_STORE *pStore, int nType, |
| X509_NAME *pName, X509_OBJECT *pObj) |
| { |
| X509_STORE_CTX pStoreCtx; |
| int rc; |
| |
| X509_STORE_CTX_init(&pStoreCtx, pStore, NULL, NULL); |
| rc = X509_STORE_get_by_subject(&pStoreCtx, nType, pName, pObj); |
| X509_STORE_CTX_cleanup(&pStoreCtx); |
| return rc; |
| } |
| |
| /* _________________________________________________________________ |
| ** |
| ** Cipher Suite Spec String Creation |
| ** _________________________________________________________________ |
| */ |
| |
| char *SSL_make_ciphersuite(apr_pool_t *p, SSL *ssl) |
| { |
| STACK_OF(SSL_CIPHER) *sk; |
| SSL_CIPHER *c; |
| int i; |
| int l; |
| char *cpCipherSuite; |
| char *cp; |
| |
| if (ssl == NULL) |
| return ""; |
| if ((sk = (STACK_OF(SSL_CIPHER) *)SSL_get_ciphers(ssl)) == NULL) |
| return ""; |
| l = 0; |
| for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { |
| c = sk_SSL_CIPHER_value(sk, i); |
| l += strlen(SSL_CIPHER_get_name(c))+2+1; |
| } |
| if (l == 0) |
| return ""; |
| cpCipherSuite = (char *)apr_palloc(p, l+1); |
| cp = cpCipherSuite; |
| for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { |
| c = sk_SSL_CIPHER_value(sk, i); |
| l = strlen(SSL_CIPHER_get_name(c)); |
| memcpy(cp, SSL_CIPHER_get_name(c), l); |
| cp += l; |
| *cp++ = '/'; |
| *cp++ = (SSL_CIPHER_get_valid(c) == 1 ? '1' : '0'); |
| *cp++ = ':'; |
| } |
| *(cp-1) = NUL; |
| return cpCipherSuite; |
| } |
| |
| /* _________________________________________________________________ |
| ** |
| ** Certificate Checks |
| ** _________________________________________________________________ |
| */ |
| |
| /* check whether cert contains extended key usage with a SGC tag */ |
| BOOL SSL_X509_isSGC(X509 *cert) |
| { |
| X509_EXTENSION *ext; |
| int ext_nid; |
| STACK *sk; |
| BOOL is_sgc; |
| int idx; |
| int i; |
| |
| is_sgc = FALSE; |
| idx = X509_get_ext_by_NID(cert, NID_ext_key_usage, -1); |
| if (idx >= 0) { |
| ext = X509_get_ext(cert, idx); |
| if ((sk = (STACK *)X509V3_EXT_d2i(ext)) != NULL) { |
| for (i = 0; i < sk_num(sk); i++) { |
| ext_nid = OBJ_obj2nid((ASN1_OBJECT *)sk_value(sk, i)); |
| if (ext_nid == NID_ms_sgc || ext_nid == NID_ns_sgc) { |
| is_sgc = TRUE; |
| break; |
| } |
| } |
| } |
| } |
| return is_sgc; |
| } |
| |
| /* retrieve basic constraints ingredients */ |
| BOOL SSL_X509_getBC(X509 *cert, int *ca, int *pathlen) |
| { |
| X509_EXTENSION *ext; |
| BASIC_CONSTRAINTS *bc; |
| int idx; |
| BIGNUM *bn = NULL; |
| char *cp; |
| |
| if ((idx = X509_get_ext_by_NID(cert, NID_basic_constraints, -1)) < 0) |
| return FALSE; |
| ext = X509_get_ext(cert, idx); |
| if (ext == NULL) |
| return FALSE; |
| if ((bc = (BASIC_CONSTRAINTS *)X509V3_EXT_d2i(ext)) == NULL) |
| return FALSE; |
| *ca = bc->ca; |
| *pathlen = -1 /* unlimited */; |
| if (bc->pathlen != NULL) { |
| if ((bn = ASN1_INTEGER_to_BN(bc->pathlen, NULL)) == NULL) |
| return FALSE; |
| if ((cp = BN_bn2dec(bn)) == NULL) |
| return FALSE; |
| *pathlen = atoi(cp); |
| free(cp); |
| BN_free(bn); |
| } |
| BASIC_CONSTRAINTS_free(bc); |
| return TRUE; |
| } |
| |
| /* retrieve subject CommonName of certificate */ |
| BOOL SSL_X509_getCN(apr_pool_t *p, X509 *xs, char **cppCN) |
| { |
| X509_NAME *xsn; |
| X509_NAME_ENTRY *xsne; |
| int i, nid; |
| char *data_ptr; |
| int data_len; |
| |
| xsn = X509_get_subject_name(xs); |
| for (i = 0; i < sk_X509_NAME_ENTRY_num((STACK_OF(X509_NAME_ENTRY) *) |
| X509_NAME_get_entries(xsn)); i++) { |
| xsne = sk_X509_NAME_ENTRY_value((STACK_OF(X509_NAME_ENTRY) *) |
| X509_NAME_get_entries(xsn), i); |
| nid = OBJ_obj2nid((ASN1_OBJECT *)X509_NAME_ENTRY_get_object(xsne)); |
| if (nid == NID_commonName) { |
| data_ptr = X509_NAME_ENTRY_get_data_ptr(xsne); |
| data_len = X509_NAME_ENTRY_get_data_len(xsne); |
| *cppCN = apr_palloc(p, data_len+1); |
| apr_cpystrn(*cppCN, (char *)data_ptr, data_len+1); |
| (*cppCN)[data_len] = NUL; |
| #ifdef CHARSET_EBCDIC |
| ascii2ebcdic(*cppCN, *cppCN, strlen(*cppCN)); |
| #endif |
| return TRUE; |
| } |
| } |
| return FALSE; |
| } |
| |
| /* _________________________________________________________________ |
| ** |
| ** Low-Level CA Certificate Loading |
| ** _________________________________________________________________ |
| */ |
| |
| #ifdef SSL_EXPERIMENTAL_PROXY |
| |
| BOOL SSL_load_CrtAndKeyInfo_file(apr_pool_t *p, STACK_OF(X509_INFO) *sk, char *filename) |
| { |
| BIO *in; |
| |
| if ((in = BIO_new(BIO_s_file())) == NULL) |
| return FALSE; |
| if (BIO_read_filename(in, filename) <= 0) { |
| BIO_free(in); |
| return FALSE; |
| } |
| ERR_clear_error(); |
| #if SSL_LIBRARY_VERSION < 0x00904000 |
| PEM_X509_INFO_read_bio(in, sk, NULL); |
| #else |
| PEM_X509_INFO_read_bio(in, sk, NULL, NULL); |
| #endif |
| BIO_free(in); |
| return TRUE; |
| } |
| |
| BOOL SSL_load_CrtAndKeyInfo_path(apr_pool_t *p, STACK_OF(X509_INFO) *sk, char *pathname) |
| { |
| apr_pool_t *sp; |
| apr_dir_t *dir; |
| apr_finfo_t dirent; |
| char *fullname; |
| BOOL ok; |
| |
| apr_pool_sub_make(&sp, p, NULL); |
| if (apr_dir_open(&dir, pathname, sp)) != APR_SUCCESS) { |
| apr_pool_destroy(sp); |
| return FALSE; |
| } |
| ok = FALSE; |
| while ((apr_dir_read(&dirent, APR_FINFO_DIRENT, dir)) == APR_SUCCESS) { |
| fullname = apr_pstrcat(sp, pathname, "/", dirent.name, NULL); |
| if (dirent.filetype != APR_REG) |
| continue; |
| if (SSL_load_CrtAndKeyInfo_file(sp, sk, fullname)) |
| ok = TRUE; |
| } |
| apr_dir_close(dir); |
| apr_pool_destroy(sp); |
| return ok; |
| } |
| |
| #endif /* SSL_EXPERIMENTAL_PROXY */ |
| |
| /* _________________________________________________________________ |
| ** |
| ** Extra Server Certificate Chain Support |
| ** _________________________________________________________________ |
| */ |
| |
| /* |
| * Read a file that optionally contains the server certificate in PEM |
| * format, possibly followed by a sequence of CA certificates that |
| * should be sent to the peer in the SSL Certificate message. |
| */ |
| int SSL_CTX_use_certificate_chain( |
| SSL_CTX *ctx, char *file, int skipfirst, int (*cb)(char*,int,int,void*)) |
| { |
| BIO *bio; |
| X509 *x509; |
| unsigned long err; |
| int n; |
| STACK *extra_certs; |
| |
| if ((bio = BIO_new(BIO_s_file_internal())) == NULL) |
| return -1; |
| if (BIO_read_filename(bio, file) <= 0) { |
| BIO_free(bio); |
| return -1; |
| } |
| /* optionally skip a leading server certificate */ |
| if (skipfirst) { |
| #if SSL_LIBRARY_VERSION < 0x00904000 |
| if ((x509 = PEM_read_bio_X509(bio, NULL, cb)) == NULL) { |
| #else |
| if ((x509 = PEM_read_bio_X509(bio, NULL, cb, NULL)) == NULL) { |
| #endif |
| BIO_free(bio); |
| return -1; |
| } |
| X509_free(x509); |
| } |
| /* free a perhaps already configured extra chain */ |
| extra_certs=SSL_CTX_get_extra_certs(ctx); |
| if (extra_certs != NULL) { |
| sk_X509_pop_free((STACK_OF(X509) *)extra_certs, X509_free); |
| SSL_CTX_set_extra_certs(ctx,NULL); |
| } |
| /* create new extra chain by loading the certs */ |
| n = 0; |
| #if SSL_LIBRARY_VERSION < 0x00904000 |
| while ((x509 = PEM_read_bio_X509(bio, NULL, cb)) != NULL) { |
| #else |
| while ((x509 = PEM_read_bio_X509(bio, NULL, cb, NULL)) != NULL) { |
| #endif |
| if (!SSL_CTX_add_extra_chain_cert(ctx, x509)) { |
| X509_free(x509); |
| BIO_free(bio); |
| return -1; |
| } |
| n++; |
| } |
| /* Make sure that only the error is just an EOF */ |
| if ((err = ERR_peek_error()) > 0) { |
| if (!( ERR_GET_LIB(err) == ERR_LIB_PEM |
| && ERR_GET_REASON(err) == PEM_R_NO_START_LINE)) { |
| BIO_free(bio); |
| return -1; |
| } |
| while (ERR_get_error() > 0) ; |
| } |
| BIO_free(bio); |
| return n; |
| } |
| |
| /* _________________________________________________________________ |
| ** |
| ** Session Stuff |
| ** _________________________________________________________________ |
| */ |
| |
| char *SSL_SESSION_id2sz(unsigned char *id, int idlen, |
| char *str, int strsize) |
| { |
| char *cp; |
| int n; |
| |
| cp = str; |
| for (n = 0; n < idlen && n < SSL_MAX_SSL_SESSION_ID_LENGTH; n++) { |
| apr_snprintf(cp, strsize - (cp-str), "%02X", id[n]); |
| cp += 2; |
| } |
| *cp = NUL; |
| return str; |
| } |
| |
