/* 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_util_ssl.c * Additional Utility Functions for OpenSSL */ #include "ssl_private.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, modssl_read_bio_cb_fn *cb) { X509 *rc; BIO *bioS; BIO *bioF; /* 1. try PEM (= DER+Base64+headers) */ if ((bioS=BIO_new_file(filename, "r")) == NULL) return NULL; rc = modssl_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, modssl_read_bio_cb_fn *cb, 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 = modssl_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; int rv = 1; ERR_clear_error(); if (cpFile == NULL && cpPath == NULL) return NULL; if ((pStore = X509_STORE_new()) == NULL) return NULL; if (cpFile != NULL) { pLookup = X509_STORE_add_lookup(pStore, X509_LOOKUP_file()); if (pLookup == NULL) { X509_STORE_free(pStore); return NULL; } rv = X509_LOOKUP_load_file(pLookup, cpFile, X509_FILETYPE_PEM); } if (cpPath != NULL && rv == 1) { pLookup = X509_STORE_add_lookup(pStore, X509_LOOKUP_hash_dir()); if (pLookup == NULL) { X509_STORE_free(pStore); return NULL; } rv = X509_LOOKUP_add_dir(pLookup, cpPath, X509_FILETYPE_PEM); } return rv == 1 ? pStore : NULL; } 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) { #ifdef HAVE_SSL_X509V3_EXT_d2i 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; #else return FALSE; #endif } /* retrieve basic constraints ingredients */ BOOL SSL_X509_getBC(X509 *cert, int *ca, int *pathlen) { #ifdef HAVE_SSL_X509V3_EXT_d2i 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; #else return FALSE; #endif } /* 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; unsigned 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; ap_xlate_proto_from_ascii(*cppCN, data_len); return TRUE; } } return FALSE; } /* _________________________________________________________________ ** ** Low-Level CA Certificate Loading ** _________________________________________________________________ */ BOOL SSL_X509_INFO_load_file(apr_pool_t *ptemp, STACK_OF(X509_INFO) *sk, const char *filename) { BIO *in; if (!(in = BIO_new(BIO_s_file()))) { return FALSE; } if (BIO_read_filename(in, MODSSL_PCHAR_CAST filename) <= 0) { BIO_free(in); return FALSE; } ERR_clear_error(); modssl_PEM_X509_INFO_read_bio(in, sk, NULL, NULL); BIO_free(in); return TRUE; } BOOL SSL_X509_INFO_load_path(apr_pool_t *ptemp, STACK_OF(X509_INFO) *sk, const char *pathname) { /* XXX: this dir read code is exactly the same as that in * ssl_engine_init.c, only the call to handle the fullname is different, * should fold the duplication. */ apr_dir_t *dir; apr_finfo_t dirent; apr_int32_t finfo_flags = APR_FINFO_TYPE|APR_FINFO_NAME; const char *fullname; BOOL ok = FALSE; if (apr_dir_open(&dir, pathname, ptemp) != APR_SUCCESS) { return FALSE; } while ((apr_dir_read(&dirent, finfo_flags, dir)) == APR_SUCCESS) { if (dirent.filetype == APR_DIR) { continue; /* don't try to load directories */ } fullname = apr_pstrcat(ptemp, pathname, "/", dirent.name, NULL); if (SSL_X509_INFO_load_file(ptemp, sk, fullname)) { ok = TRUE; } } apr_dir_close(dir); return ok; } /* _________________________________________________________________ ** ** 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, modssl_read_bio_cb_fn *cb) { 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 ((x509 = modssl_PEM_read_bio_X509(bio, NULL, cb, NULL)) == NULL) { 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; while ((x509 = modssl_PEM_read_bio_X509(bio, NULL, cb, NULL)) != NULL) { 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; } /* sslc+OpenSSL compat */ int modssl_session_get_time(SSL_SESSION *session) { #ifdef OPENSSL_VERSION_NUMBER return SSL_SESSION_get_time(session); #else /* assume sslc */ CRYPTO_TIME_T ct; SSL_SESSION_get_time(session, &ct); return CRYPTO_time_to_int(&ct); #endif } #ifndef SSLC_VERSION_NUMBER #define SSLC_VERSION_NUMBER 0x0000 #endif DH *modssl_dh_configure(unsigned char *p, int plen, unsigned char *g, int glen) { DH *dh; if (!(dh = DH_new())) { return NULL; } #if defined(OPENSSL_VERSION_NUMBER) || (SSLC_VERSION_NUMBER < 0x2000) dh->p = BN_bin2bn(p, plen, NULL); dh->g = BN_bin2bn(g, glen, NULL); if (!(dh->p && dh->g)) { DH_free(dh); return NULL; } #else R_EITEMS_add(dh->data, PK_TYPE_DH, PK_DH_P, 0, p, plen, R_EITEMS_PF_COPY); R_EITEMS_add(dh->data, PK_TYPE_DH, PK_DH_G, 0, g, glen, R_EITEMS_PF_COPY); #endif return dh; }
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