/*! \file ssl/ssl_lib.c * \brief Version independent SSL functions. */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * 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 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS 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 AUTHOR OR 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. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== * Copyright (c) 1998-2001 The OpenSSL Project. 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. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``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 OpenSSL PROJECT 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. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ /* ==================================================================== * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. * ECC cipher suite support in OpenSSL originally developed by * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */ #ifdef REF_CHECK # include #endif #include #include "ssl_locl.h" #include "kssl_lcl.h" #include #include #include #ifndef OPENSSL_NO_DH #include #endif const char *SSL_version_str=OPENSSL_VERSION_TEXT; SSL3_ENC_METHOD ssl3_undef_enc_method={ /* evil casts, but these functions are only called if there's a library bug */ (int (*)(SSL *,int))ssl_undefined_function, (int (*)(SSL *, unsigned char *, int))ssl_undefined_function, ssl_undefined_function, (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function, (int (*)(SSL*, int))ssl_undefined_function, (int (*)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char*, int, unsigned char *))ssl_undefined_function, 0, /* finish_mac_length */ (int (*)(SSL *, EVP_MD_CTX *, unsigned char *))ssl_undefined_function, NULL, /* client_finished_label */ 0, /* client_finished_label_len */ NULL, /* server_finished_label */ 0, /* server_finished_label_len */ (int (*)(int))ssl_undefined_function }; int SSL_clear(SSL *s) { if (s->method == NULL) { SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED); return(0); } if (ssl_clear_bad_session(s)) { SSL_SESSION_free(s->session); s->session=NULL; } s->error=0; s->hit=0; s->shutdown=0; #if 0 /* Disabled since version 1.10 of this file (early return not * needed because SSL_clear is not called when doing renegotiation) */ /* This is set if we are doing dynamic renegotiation so keep * the old cipher. It is sort of a SSL_clear_lite :-) */ if (s->new_session) return(1); #else if (s->new_session) { SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR); return 0; } #endif s->type=0; s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT); s->version=s->method->version; s->client_version=s->version; s->rwstate=SSL_NOTHING; s->rstate=SSL_ST_READ_HEADER; #if 0 s->read_ahead=s->ctx->read_ahead; #endif if (s->init_buf != NULL) { BUF_MEM_free(s->init_buf); s->init_buf=NULL; } ssl_clear_cipher_ctx(s); s->first_packet=0; #if 1 /* Check to see if we were changed into a different method, if * so, revert back if we are not doing session-id reuse. */ if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method)) { s->method->ssl_free(s); s->method=s->ctx->method; if (!s->method->ssl_new(s)) return(0); } else #endif s->method->ssl_clear(s); return(1); } /** Used to change an SSL_CTXs default SSL method type */ int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth) { STACK_OF(SSL_CIPHER) *sk; ctx->method=meth; sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list), &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST); if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) { SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS); return(0); } return(1); } SSL *SSL_new(SSL_CTX *ctx) { SSL *s; if (ctx == NULL) { SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX); return(NULL); } if (ctx->method == NULL) { SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION); return(NULL); } s=(SSL *)OPENSSL_malloc(sizeof(SSL)); if (s == NULL) goto err; memset(s,0,sizeof(SSL)); #ifndef OPENSSL_NO_KRB5 s->kssl_ctx = kssl_ctx_new(); #endif /* OPENSSL_NO_KRB5 */ s->options=ctx->options; s->mode=ctx->mode; s->max_cert_list=ctx->max_cert_list; if (ctx->cert != NULL) { /* Earlier library versions used to copy the pointer to * the CERT, not its contents; only when setting new * parameters for the per-SSL copy, ssl_cert_new would be * called (and the direct reference to the per-SSL_CTX * settings would be lost, but those still were indirectly * accessed for various purposes, and for that reason they * used to be known as s->ctx->default_cert). * Now we don't look at the SSL_CTX's CERT after having * duplicated it once. */ s->cert = ssl_cert_dup(ctx->cert); if (s->cert == NULL) goto err; } else s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */ s->read_ahead=ctx->read_ahead; s->msg_callback=ctx->msg_callback; s->msg_callback_arg=ctx->msg_callback_arg; s->verify_mode=ctx->verify_mode; #if 0 s->verify_depth=ctx->verify_depth; #endif s->sid_ctx_length=ctx->sid_ctx_length; OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx); memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx)); s->verify_callback=ctx->default_verify_callback; s->generate_session_id=ctx->generate_session_id; s->param = X509_VERIFY_PARAM_new(); if (!s->param) goto err; X509_VERIFY_PARAM_inherit(s->param, ctx->param); #if 0 s->purpose = ctx->purpose; s->trust = ctx->trust; #endif s->quiet_shutdown=ctx->quiet_shutdown; CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX); s->ctx=ctx; s->verify_result=X509_V_OK; s->method=ctx->method; if (!s->method->ssl_new(s)) goto err; s->references=1; s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1; SSL_clear(s); CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); return(s); err: if (s != NULL) { if (s->cert != NULL) ssl_cert_free(s->cert); if (s->ctx != NULL) SSL_CTX_free(s->ctx); /* decrement reference count */ OPENSSL_free(s); } SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE); return(NULL); } int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx, unsigned int sid_ctx_len) { if(sid_ctx_len > sizeof ctx->sid_ctx) { SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); return 0; } ctx->sid_ctx_length=sid_ctx_len; memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len); return 1; } int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx, unsigned int sid_ctx_len) { if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); return 0; } ssl->sid_ctx_length=sid_ctx_len; memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len); return 1; } int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) { CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); ctx->generate_session_id = cb; CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); return 1; } int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) { CRYPTO_w_lock(CRYPTO_LOCK_SSL); ssl->generate_session_id = cb; CRYPTO_w_unlock(CRYPTO_LOCK_SSL); return 1; } int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, unsigned int id_len) { /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how * we can "construct" a session to give us the desired check - ie. to * find if there's a session in the hash table that would conflict with * any new session built out of this id/id_len and the ssl_version in * use by this SSL. */ SSL_SESSION r, *p; if(id_len > sizeof r.session_id) return 0; r.ssl_version = ssl->version; r.session_id_length = id_len; memcpy(r.session_id, id, id_len); /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a * callback is calling us to check the uniqueness of a shorter ID, it * must be compared as a padded-out ID because that is what it will be * converted to when the callback has finished choosing it. */ if((r.ssl_version == SSL2_VERSION) && (id_len < SSL2_SSL_SESSION_ID_LENGTH)) { memset(r.session_id + id_len, 0, SSL2_SSL_SESSION_ID_LENGTH - id_len); r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH; } CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r); CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); return (p != NULL); } int SSL_CTX_set_purpose(SSL_CTX *s, int purpose) { return X509_VERIFY_PARAM_set_purpose(s->param, purpose); } int SSL_set_purpose(SSL *s, int purpose) { return X509_VERIFY_PARAM_set_purpose(s->param, purpose); } int SSL_CTX_set_trust(SSL_CTX *s, int trust) { return X509_VERIFY_PARAM_set_trust(s->param, trust); } int SSL_set_trust(SSL *s, int trust) { return X509_VERIFY_PARAM_set_trust(s->param, trust); } void SSL_free(SSL *s) { int i; if(s == NULL) return; i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL); #ifdef REF_PRINT REF_PRINT("SSL",s); #endif if (i > 0) return; #ifdef REF_CHECK if (i < 0) { fprintf(stderr,"SSL_free, bad reference count\n"); abort(); /* ok */ } #endif if (s->param) X509_VERIFY_PARAM_free(s->param); CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); if (s->bbio != NULL) { /* If the buffering BIO is in place, pop it off */ if (s->bbio == s->wbio) { s->wbio=BIO_pop(s->wbio); } BIO_free(s->bbio); s->bbio=NULL; } if (s->rbio != NULL) BIO_free_all(s->rbio); if ((s->wbio != NULL) && (s->wbio != s->rbio)) BIO_free_all(s->wbio); if (s->init_buf != NULL) BUF_MEM_free(s->init_buf); /* add extra stuff */ if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list); if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id); /* Make the next call work :-) */ if (s->session != NULL) { ssl_clear_bad_session(s); SSL_SESSION_free(s->session); } ssl_clear_cipher_ctx(s); if (s->cert != NULL) ssl_cert_free(s->cert); /* Free up if allocated */ if (s->ctx) SSL_CTX_free(s->ctx); if (s->client_CA != NULL) sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free); if (s->method != NULL) s->method->ssl_free(s); #ifndef OPENSSL_NO_KRB5 if (s->kssl_ctx != NULL) kssl_ctx_free(s->kssl_ctx); #endif /* OPENSSL_NO_KRB5 */ OPENSSL_free(s); } void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio) { /* If the output buffering BIO is still in place, remove it */ if (s->bbio != NULL) { if (s->wbio == s->bbio) { s->wbio=s->wbio->next_bio; s->bbio->next_bio=NULL; } } if ((s->rbio != NULL) && (s->rbio != rbio)) BIO_free_all(s->rbio); if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio)) BIO_free_all(s->wbio); s->rbio=rbio; s->wbio=wbio; } BIO *SSL_get_rbio(const SSL *s) { return(s->rbio); } BIO *SSL_get_wbio(const SSL *s) { return(s->wbio); } int SSL_get_fd(const SSL *s) { return(SSL_get_rfd(s)); } int SSL_get_rfd(const SSL *s) { int ret= -1; BIO *b,*r; b=SSL_get_rbio(s); r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR); if (r != NULL) BIO_get_fd(r,&ret); return(ret); } int SSL_get_wfd(const SSL *s) { int ret= -1; BIO *b,*r; b=SSL_get_wbio(s); r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR); if (r != NULL) BIO_get_fd(r,&ret); return(ret); } #ifndef OPENSSL_NO_SOCK int SSL_set_fd(SSL *s,int fd) { int ret=0; BIO *bio=NULL; bio=BIO_new(BIO_s_socket()); if (bio == NULL) { SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB); goto err; } BIO_set_fd(bio,fd,BIO_NOCLOSE); SSL_set_bio(s,bio,bio); ret=1; err: return(ret); } int SSL_set_wfd(SSL *s,int fd) { int ret=0; BIO *bio=NULL; if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET) || ((int)BIO_get_fd(s->rbio,NULL) != fd)) { bio=BIO_new(BIO_s_socket()); if (bio == NULL) { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; } BIO_set_fd(bio,fd,BIO_NOCLOSE); SSL_set_bio(s,SSL_get_rbio(s),bio); } else SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s)); ret=1; err: return(ret); } int SSL_set_rfd(SSL *s,int fd) { int ret=0; BIO *bio=NULL; if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET) || ((int)BIO_get_fd(s->wbio,NULL) != fd)) { bio=BIO_new(BIO_s_socket()); if (bio == NULL) { SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB); goto err; } BIO_set_fd(bio,fd,BIO_NOCLOSE); SSL_set_bio(s,bio,SSL_get_wbio(s)); } else SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s)); ret=1; err: return(ret); } #endif /* return length of latest Finished message we sent, copy to 'buf' */ size_t SSL_get_finished(const SSL *s, void *buf, size_t count) { size_t ret = 0; if (s->s3 != NULL) { ret = s->s3->tmp.finish_md_len; if (count > ret) count = ret; memcpy(buf, s->s3->tmp.finish_md, count); } return ret; } /* return length of latest Finished message we expected, copy to 'buf' */ size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count) { size_t ret = 0; if (s->s3 != NULL) { ret = s->s3->tmp.peer_finish_md_len; if (count > ret) count = ret; memcpy(buf, s->s3->tmp.peer_finish_md, count); } return ret; } int SSL_get_verify_mode(const SSL *s) { return(s->verify_mode); } int SSL_get_verify_depth(const SSL *s) { return X509_VERIFY_PARAM_get_depth(s->param); } int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *) { return(s->verify_callback); } int SSL_CTX_get_verify_mode(const SSL_CTX *ctx) { return(ctx->verify_mode); } int SSL_CTX_get_verify_depth(const SSL_CTX *ctx) { return X509_VERIFY_PARAM_get_depth(ctx->param); } int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *) { return(ctx->default_verify_callback); } void SSL_set_verify(SSL *s,int mode, int (*callback)(int ok,X509_STORE_CTX *ctx)) { s->verify_mode=mode; if (callback != NULL) s->verify_callback=callback; } void SSL_set_verify_depth(SSL *s,int depth) { X509_VERIFY_PARAM_set_depth(s->param, depth); } void SSL_set_read_ahead(SSL *s,int yes) { s->read_ahead=yes; } int SSL_get_read_ahead(const SSL *s) { return(s->read_ahead); } int SSL_pending(const SSL *s) { /* SSL_pending cannot work properly if read-ahead is enabled * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), * and it is impossible to fix since SSL_pending cannot report * errors that may be observed while scanning the new data. * (Note that SSL_pending() is often used as a boolean value, * so we'd better not return -1.) */ return(s->method->ssl_pending(s)); } X509 *SSL_get_peer_certificate(const SSL *s) { X509 *r; if ((s == NULL) || (s->session == NULL)) r=NULL; else r=s->session->peer; if (r == NULL) return(r); CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509); return(r); } STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s) { STACK_OF(X509) *r; if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL)) r=NULL; else r=s->session->sess_cert->cert_chain; /* If we are a client, cert_chain includes the peer's own * certificate; if we are a server, it does not. */ return(r); } /* Now in theory, since the calling process own 't' it should be safe to * modify. We need to be able to read f without being hassled */ void SSL_copy_session_id(SSL *t,const SSL *f) { CERT *tmp; /* Do we need to to SSL locking? */ SSL_set_session(t,SSL_get_session(f)); /* what if we are setup as SSLv2 but want to talk SSLv3 or * vice-versa */ if (t->method != f->method) { t->method->ssl_free(t); /* cleanup current */ t->method=f->method; /* change method */ t->method->ssl_new(t); /* setup new */ } tmp=t->cert; if (f->cert != NULL) { CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT); t->cert=f->cert; } else t->cert=NULL; if (tmp != NULL) ssl_cert_free(tmp); SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length); } /* Fix this so it checks all the valid key/cert options */ int SSL_CTX_check_private_key(const SSL_CTX *ctx) { if ( (ctx == NULL) || (ctx->cert == NULL) || (ctx->cert->key->x509 == NULL)) { SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED); return(0); } if (ctx->cert->key->privatekey == NULL) { SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED); return(0); } return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey)); } /* Fix this function so that it takes an optional type parameter */ int SSL_check_private_key(const SSL *ssl) { if (ssl == NULL) { SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER); return(0); } if (ssl->cert == NULL) { SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED); return 0; } if (ssl->cert->key->x509 == NULL) { SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED); return(0); } if (ssl->cert->key->privatekey == NULL) { SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED); return(0); } return(X509_check_private_key(ssl->cert->key->x509, ssl->cert->key->privatekey)); } int SSL_accept(SSL *s) { if (s->handshake_func == 0) /* Not properly initialized yet */ SSL_set_accept_state(s); return(s->method->ssl_accept(s)); } int SSL_connect(SSL *s) { if (s->handshake_func == 0) /* Not properly initialized yet */ SSL_set_connect_state(s); return(s->method->ssl_connect(s)); } long SSL_get_default_timeout(const SSL *s) { return(s->method->get_timeout()); } int SSL_read(SSL *s,void *buf,int num) { if (s->handshake_func == 0) { SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED); return -1; } if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { s->rwstate=SSL_NOTHING; return(0); } return(s->method->ssl_read(s,buf,num)); } int SSL_peek(SSL *s,void *buf,int num) { if (s->handshake_func == 0) { SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED); return -1; } if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { return(0); } return(s->method->ssl_peek(s,buf,num)); } int SSL_write(SSL *s,const void *buf,int num) { if (s->handshake_func == 0) { SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED); return -1; } if (s->shutdown & SSL_SENT_SHUTDOWN) { s->rwstate=SSL_NOTHING; SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN); return(-1); } return(s->method->ssl_write(s,buf,num)); } int SSL_shutdown(SSL *s) { /* Note that this function behaves differently from what one might * expect. Return values are 0 for no success (yet), * 1 for success; but calling it once is usually not enough, * even if blocking I/O is used (see ssl3_shutdown). */ if (s->handshake_func == 0) { SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED); return -1; } if ((s != NULL) && !SSL_in_init(s)) return(s->method->ssl_shutdown(s)); else return(1); } int SSL_renegotiate(SSL *s) { if (s->new_session == 0) { s->new_session=1; } return(s->method->ssl_renegotiate(s)); } int SSL_renegotiate_pending(SSL *s) { /* becomes true when negotiation is requested; * false again once a handshake has finished */ return (s->new_session != 0); } long SSL_ctrl(SSL *s,int cmd,long larg,void *parg) { long l; switch (cmd) { case SSL_CTRL_GET_READ_AHEAD: return(s->read_ahead); case SSL_CTRL_SET_READ_AHEAD: l=s->read_ahead; s->read_ahead=larg; return(l); case SSL_CTRL_SET_MSG_CALLBACK_ARG: s->msg_callback_arg = parg; return 1; case SSL_CTRL_OPTIONS: return(s->options|=larg); case SSL_CTRL_MODE: return(s->mode|=larg); case SSL_CTRL_GET_MAX_CERT_LIST: return(s->max_cert_list); case SSL_CTRL_SET_MAX_CERT_LIST: l=s->max_cert_list; s->max_cert_list=larg; return(l); case SSL_CTRL_SET_MTU: if (SSL_version(s) == DTLS1_VERSION) { s->d1->mtu = larg; return larg; } return 0; default: return(s->method->ssl_ctrl(s,cmd,larg,parg)); } } long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void)) { switch(cmd) { case SSL_CTRL_SET_MSG_CALLBACK: s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp); return 1; default: return(s->method->ssl_callback_ctrl(s,cmd,fp)); } } struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx) { return ctx->sessions; } long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg) { long l; switch (cmd) { case SSL_CTRL_GET_READ_AHEAD: return(ctx->read_ahead); case SSL_CTRL_SET_READ_AHEAD: l=ctx->read_ahead; ctx->read_ahead=larg; return(l); case SSL_CTRL_SET_MSG_CALLBACK_ARG: ctx->msg_callback_arg = parg; return 1; case SSL_CTRL_GET_MAX_CERT_LIST: return(ctx->max_cert_list); case SSL_CTRL_SET_MAX_CERT_LIST: l=ctx->max_cert_list; ctx->max_cert_list=larg; return(l); case SSL_CTRL_SET_SESS_CACHE_SIZE: l=ctx->session_cache_size; ctx->session_cache_size=larg; return(l); case SSL_CTRL_GET_SESS_CACHE_SIZE: return(ctx->session_cache_size); case SSL_CTRL_SET_SESS_CACHE_MODE: l=ctx->session_cache_mode; ctx->session_cache_mode=larg; return(l); case SSL_CTRL_GET_SESS_CACHE_MODE: return(ctx->session_cache_mode); case SSL_CTRL_SESS_NUMBER: return(ctx->sessions->num_items); case SSL_CTRL_SESS_CONNECT: return(ctx->stats.sess_connect); case SSL_CTRL_SESS_CONNECT_GOOD: return(ctx->stats.sess_connect_good); case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: return(ctx->stats.sess_connect_renegotiate); case SSL_CTRL_SESS_ACCEPT: return(ctx->stats.sess_accept); case SSL_CTRL_SESS_ACCEPT_GOOD: return(ctx->stats.sess_accept_good); case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: return(ctx->stats.sess_accept_renegotiate); case SSL_CTRL_SESS_HIT: return(ctx->stats.sess_hit); case SSL_CTRL_SESS_CB_HIT: return(ctx->stats.sess_cb_hit); case SSL_CTRL_SESS_MISSES: return(ctx->stats.sess_miss); case SSL_CTRL_SESS_TIMEOUTS: return(ctx->stats.sess_timeout); case SSL_CTRL_SESS_CACHE_FULL: return(ctx->stats.sess_cache_full); case SSL_CTRL_OPTIONS: return(ctx->options|=larg); case SSL_CTRL_MODE: return(ctx->mode|=larg); default: return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg)); } } long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void)) { switch(cmd) { case SSL_CTRL_SET_MSG_CALLBACK: ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp); return 1; default: return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp)); } } int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) { long l; l=a->id-b->id; if (l == 0L) return(0); else return((l > 0)?1:-1); } int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap, const SSL_CIPHER * const *bp) { long l; l=(*ap)->id-(*bp)->id; if (l == 0L) return(0); else return((l > 0)?1:-1); } /** return a STACK of the ciphers available for the SSL and in order of * preference */ STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s) { if (s != NULL) { if (s->cipher_list != NULL) { return(s->cipher_list); } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { return(s->ctx->cipher_list); } } return(NULL); } /** return a STACK of the ciphers available for the SSL and in order of * algorithm id */ STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s) { if (s != NULL) { if (s->cipher_list_by_id != NULL) { return(s->cipher_list_by_id); } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) { return(s->ctx->cipher_list_
/* ssl/ssl_sess.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * 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 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <openssl/lhash.h>
#include <openssl/rand.h>
#include "ssl_locl.h"

static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
static void SSL_SESSION_list_add(SSL_CTX *ctx,SSL_SESSION *s);
static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);

SSL_SESSION *SSL_get_session(const SSL *ssl)
/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
	{
	return(ssl->session);
	}

SSL_SESSION *SSL_get1_session(SSL *ssl)
/* variant of SSL_get_session: caller really gets something */
	{
	SSL_SESSION *sess;
	/* Need to lock this all up rather than just use CRYPTO_add so that
	 * somebody doesn't free ssl->session between when we check it's
	 * non-null and when we up the reference count. */
	CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
	sess = ssl->session;
	if(sess)
		sess->references++;
	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
	return(sess);
	}

int SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
	{
	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp,
			new_func, dup_func, free_func);
	}

int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
	{
	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
	}

void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
	{
	return(CRYPTO_get_ex_data(&s->ex_data,idx));
	}

SSL_SESSION *SSL_SESSION_new(void)
	{
	SSL_SESSION *ss;

	ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));
	if (ss == NULL)
		{
		SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);
		return(0);
		}
	memset(ss,0,sizeof(SSL_SESSION));

	ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
	ss->references=1;
	ss->timeout=60*5+4; /* 5 minute timeout by default */
	ss->time=(unsigned long)time(NULL);
	ss->prev=NULL;
	ss->next=NULL;
	ss->compress_meth=0;
	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
	return(ss);
	}

const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
	{
	if(len)
		*len = s->session_id_length;
	return s->session_id;
	}

/* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1
 * has 32 bytes (256 bits). As such, filling the ID with random gunk repeatedly
 * until we have no conflict is going to complete in one iteration pretty much
 * "most" of the time (btw: understatement). So, if it takes us 10 iterations
 * and we still can't avoid a conflict - well that's a reasonable point to call
 * it quits. Either the RAND code is broken or someone is trying to open roughly
 * very close to 2^128 (or 2^256) SSL sessions to our server. How you might
 * store that many sessions is perhaps a more interesting question ... */

#define MAX_SESS_ID_ATTEMPTS 10
static int def_generate_session_id(const SSL *ssl, unsigned char *id,
				unsigned int *id_len)
{
	unsigned int retry = 0;
	do
		if (RAND_pseudo_bytes(id, *id_len) <= 0)
			return 0;
	while(SSL_has_matching_session_id(ssl, id, *id_len) &&
		(++retry < MAX_SESS_ID_ATTEMPTS));
	if(retry < MAX_SESS_ID_ATTEMPTS)
		return 1;
	/* else - woops a session_id match */
	/* XXX We should also check the external cache --
	 * but the probability of a collision is negligible, and
	 * we could not prevent the concurrent creation of sessions
	 * with identical IDs since we currently don't have means
	 * to atomically check whether a session ID already exists
	 * and make a reservation for it if it does not
	 * (this problem applies to the internal cache as well).
	 */
	return 0;
}

int ssl_get_new_session(SSL *s, int session)
	{
	/* This gets used by clients and servers. */

	unsigned int tmp;
	SSL_SESSION *ss=NULL;
	GEN_SESSION_CB cb = def_generate_session_id;

	if ((ss=SSL_SESSION_new()) == NULL) return(0);

	/* If the context has a default timeout, use it */
	if (s->ctx->session_timeout == 0)
		ss->timeout=SSL_get_default_timeout(s);
	else
		ss->timeout=s->ctx->session_timeout;

	if (s->session != NULL)
		{
		SSL_SESSION_free(s->session);
		s->session=NULL;
		}

	if (session)
		{
		if (s->version == SSL2_VERSION)
			{
			ss->ssl_version=SSL2_VERSION;
			ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
			}
		else if (s->version == SSL3_VERSION)
			{
			ss->ssl_version=SSL3_VERSION;
			ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
			}
		else if (s->version == TLS1_VERSION)
			{
			ss->ssl_version=TLS1_VERSION;
			ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
			}
		else if (s->version == DTLS1_VERSION)
			{
			ss->ssl_version=DTLS1_VERSION;
			ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
			}
		else
			{
			SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_VERSION);
			SSL_SESSION_free(ss);
			return(0);
			}
		/* Choose which callback will set the session ID */
		CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
		if(s->generate_session_id)
			cb = s->generate_session_id;
		else if(s->ctx->generate_session_id)
			cb = s->ctx->generate_session_id;
		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
		/* Choose a session ID */
		tmp = ss->session_id_length;
		if(!cb(s, ss->session_id, &tmp))
			{
			/* The callback failed */
			SSLerr(SSL_F_SSL_GET_NEW_SESSION,
				SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
			SSL_SESSION_free(ss);
			return(0);
			}
		/* Don't allow the callback to set the session length to zero.
		 * nor set it higher than it was. */
		if(!tmp || (tmp > ss->session_id_length))
			{
			/* The callback set an illegal length */
			SSLerr(SSL_F_SSL_GET_NEW_SESSION,
				SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
			SSL_SESSION_free(ss);
			return(0);
			}
		/* If the session length was shrunk and we're SSLv2, pad it */
		if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION))
			memset(ss->session_id + tmp, 0, ss->session_id_length - tmp);
		else
			ss->session_id_length = tmp;
		/* Finally, check for a conflict */
		if(SSL_has_matching_session_id(s, ss->session_id,
						ss->session_id_length))
			{
			SSLerr(SSL_F_SSL_GET_NEW_SESSION,
				SSL_R_SSL_SESSION_ID_CONFLICT);
			SSL_SESSION_free(ss);
			return(0);
			}
		}
	else
		{
		ss->session_id_length=0;
		}

	if (s->sid_ctx_length > sizeof ss->sid_ctx)
		{
		SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
		SSL_SESSION_free(ss);
		return 0;
		}
	memcpy(ss->sid_ctx,s->sid_ctx,s->sid_ctx_length);
	ss->sid_ctx_length=s->sid_ctx_length;
	s->session=ss;
	ss->ssl_version=s->version;
	ss->verify_result = X509_V_OK;

	return(1);
	}

int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len)
	{
	/* This is used only by servers. */

	SSL_SESSION *ret=NULL,data;
	int fatal = 0;

	data.ssl_version=s->version;
	data.session_id_length=len;
	if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
		goto err;
	memcpy(data.session_id,session_id,len);

	if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
		{
		CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
		ret=(SSL_SESSION *)lh_retrieve(s->ctx->sessions,&data);
		if (ret != NULL)
		    /* don't allow other threads to steal it: */
		    CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
		}

	if (ret == NULL)
		{
		int copy=1;
	
		s->ctx->stats.sess_miss++;
		ret=NULL;
		if (s->ctx->get_session_cb != NULL
		    && (ret=s->ctx->get_session_cb(s,session_id,len,&copy))
		       != NULL)
			{
			s->ctx->stats.sess_cb_hit++;

			/* Increment reference count now if the session callback
			 * asks us to do so (note that if the session structures
			 * returned by the callback are shared between threads,
			 * it must handle the reference count itself [i.e. copy == 0],
			 * or things won't be thread-safe). */
			if (copy)
				CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);

			/* Add the externally cached session to the internal
			 * cache as well if and only if we are supposed to. */
			if(!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE))
				/* The following should not return 1, otherwise,
				 * things are very strange */
				SSL_CTX_add_session(s->ctx,ret);
			}
		if (ret == NULL)
			goto err;
		}

	/* Now ret is non-NULL, and we own one of its reference counts. */

	if((s->verify_mode&SSL_VERIFY_PEER)
	   && (!s->sid_ctx_length || ret->sid_ctx_length != s->sid_ctx_length
	       || memcmp(ret->sid_ctx,s->sid_ctx,ret->sid_ctx_length)))
	    {
		/* We've found the session named by the client, but we don't
		 * want to use it in this context. */
		
		if (s->sid_ctx_length == 0)
			{
			/* application should have used SSL[_CTX]_set_session_id_context
			 * -- we could tolerate this and just pretend we never heard
			 * of this session, but then applications could effectively
			 * disable the session cache by accident without anyone noticing */

			SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
			fatal = 1;
			goto err;
			}
		else
			{
#if 0 /* The client cannot always know when a session is not appropriate,
	   * so we shouldn't generate an error message. */

			SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
#endif
			goto err; /* treat like cache miss */
			}
		}

	if (ret->cipher == NULL)
		{
		unsigned char buf[5],*p;
		unsigned long l;

		p=buf;
		l=ret->cipher_id;
		l2n(l,p);
		if ((ret->ssl_version>>8) == SSL3_VERSION_MAJOR)
			ret->cipher=ssl_get_cipher_by_char(s,&(buf[2]));
		else 
			ret->cipher=ssl_get_cipher_by_char(s,&(buf[1]));
		if (ret->cipher == NULL)
			goto err;
		}


#if 0 /* This is way too late. */

	/* If a thread got the session, then 'swaped', and another got
	 * it and then due to a time-out decided to 'OPENSSL_free' it we could
	 * be in trouble.  So I'll increment it now, then double decrement
	 * later - am I speaking rubbish?. */
	CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
#endif

	if (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */
		{
		s->ctx->stats.sess_timeout++;
		/* remove it from the cache */
		SSL_CTX_remove_session(s->ctx,ret);
		goto err;
		}

	s->ctx->stats.sess_hit++;

	/* ret->time=time(NULL); */ /* rezero timeout? */
	/* again, just leave the session 
	 * if it is the same session, we have just incremented and
	 * then decremented the reference count :-) */
	if (s->session != NULL)
		SSL_SESSION_free(s->session);
	s->session=ret;
	s->verify_result = s->session->verify_result;
	return(1);

 err:
	if (ret != NULL)
		SSL_SESSION_free(ret);
	if (fatal)
		return -1;
	else
		return 0;
	}

int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
	{
	int ret=0;
	SSL_SESSION *s;

	/* add just 1 reference count for the SSL_CTX's session cache
	 * even though it has two ways of access: each session is in a
	 * doubly linked list and an lhash */
	CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);
	/* if session c is in already in cache, we take back the increment later */

	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
	s=(SSL_SESSION *)lh_insert(ctx->sessions,c);
	
	/* s != NULL iff we already had a session with the given PID.
	 * In this case, s == c should hold (then we did not really modify
	 * ctx->sessions), or we're in trouble. */
	if (s != NULL && s != c)
		{
		/* We *are* in trouble ... */
		SSL_SESSION_list_remove(ctx,s);
		SSL_SESSION_free(s);
		/* ... so pretend the other session did not exist in cache
		 * (we cannot handle two SSL_SESSION structures with identical
		 * session ID in the same cache, which could happen e.g. when
		 * two threads concurrently obtain the same session from an external
		 * cache) */
		s = NULL;
		}

 	/* Put at the head of the queue unless it is already in the cache */
	if (s == NULL)
		SSL_SESSION_list_add(ctx,c);

	if (s != NULL)
		{
		/* existing cache entry -- decrement previously incremented reference
		 * count because it already takes into account the cache */

		SSL_SESSION_free(s); /* s == c */
		ret=0;
		}
	else
		{
		/* new cache entry -- remove old ones if cache has become too large */
		
		ret=1;

		if (SSL_CTX_sess_get_cache_size(ctx) > 0)
			{
			while (SSL_CTX_sess_number(ctx) >
				SSL_CTX_sess_get_cache_size(ctx))
				{
				if (!remove_session_lock(ctx,
					ctx->session_cache_tail, 0))
					break;
				else
					ctx->stats.sess_cache_full++;
				}
			}
		}
	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
	return(ret);
	}

int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
{
	return remove_session_lock(ctx, c, 1);
}

static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
	{
	SSL_SESSION *r;
	int ret=0;

	if ((c != NULL) && (c->session_id_length != 0))
		{
		if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
		if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions,c)) == c)
			{
			ret=1;
			r=(SSL_SESSION *)lh_delete(ctx->sessions,c);
			SSL_SESSION_list_remove(ctx,c);
			}

		if(lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);

		if (ret)
			{
			r->not_resumable=1;
			if (ctx->remove_session_cb != NULL)
				ctx->remove_session_cb(ctx,r);
			SSL_SESSION_free(r);
			}
		}
	else
		ret=0;
	return(ret);
	}

void SSL_SESSION_free(SSL_SESSION *ss)
	{
	int i;

	if(ss == NULL)
	    return;

	i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);
#ifdef REF_PRINT
	REF_PRINT("SSL_SESSION",ss);
#endif
	if (i > 0) return;
#ifdef REF_CHECK
	if (i < 0)
		{
		fprintf(stderr,"SSL_SESSION_free, bad reference count\n");
		abort(); /* ok */
		}
#endif

	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);

	OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg);
	OPENSSL_cleanse(ss->master_key,sizeof ss->master_key);
	OPENSSL_cleanse(ss->session_id,sizeof ss->session_id);
	if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert);
	if (ss->peer != NULL) X509_free(ss->peer);
	if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);
	OPENSSL_cleanse(ss,sizeof(*ss));
	OPENSSL_free(ss);
	}

int SSL_set_session(SSL *s, SSL_SESSION *session)
	{
	int ret=0;
	SSL_METHOD *meth;

	if (session != NULL)
		{
		meth=s->ctx->method->get_ssl_method(session->ssl_version);
		if (meth == NULL)
			meth=s->method->get_ssl_method(session->ssl_version);
		if (meth == NULL)
			{
			SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_METHOD);
			return(0);
			}

		if (meth != s->method)
			{
			if (!SSL_set_ssl_method(s,meth))
				return(0);
			if (s->ctx->session_timeout == 0)
				session->timeout=SSL_get_default_timeout(s);
			else
				session->timeout=s->ctx->session_timeout;
			}

#ifndef OPENSSL_NO_KRB5
                if (s->kssl_ctx && !s->kssl_ctx->client_princ &&
                    session->krb5_client_princ_len > 0)
                {
                    s->kssl_ctx->client_princ = (char *)malloc(session->krb5_client_princ_len + 1);
                    memcpy(s->kssl_ctx->client_princ,session->krb5_client_princ,
                            session->krb5_client_princ_len);
                    s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';
                }
#endif /* OPENSSL_NO_KRB5 */

		/* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
		CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION);
		if (s->session != NULL)
			SSL_SESSION_free(s->session);
		s->session=session;
		s->verify_result = s->session->verify_result;
		/* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
		ret=1;
		}
	else
		{
		if (s->session != NULL)
			{
			SSL_SESSION_free(s->session);
			s->session=NULL;
			}

		meth=s->ctx->method;
		if (meth != s->method)
			{
			if (!SSL_set_ssl_method(s,meth))
				return(0);
			}
		ret=1;
		}
	return(ret);
	}

long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
	{
	if (s == NULL) return(0);
	s->timeout=t;
	return(1);
	}

long SSL_SESSION_get_timeout(const SSL_SESSION *s)
	{
	if (s == NULL) return(0);
	return(s->timeout);
	}

long SSL_SESSION_get_time(const SSL_SESSION *s)
	{
	if (s == NULL) return(0);
	return(s->time);
	}

long SSL_SESSION_set_time(SSL_SESSION *s, long t)
	{
	if (s == NULL) return(0);
	s->time=t;
	return(t);
	}

long SSL_CTX_set_timeout(SSL_CTX *s, long t)
	{
	long l;
	if (s == NULL) return(0);
	l=s->session_timeout;
	s->session_timeout=t;
	return(l);
	}

long SSL_CTX_get_timeout(const SSL_CTX *s)
	{
	if (s == NULL) return(0);
	return(s->session_timeout);
	}

typedef struct timeout_param_st
	{
	SSL_CTX *ctx;
	long time;
	LHASH *cache;
	} TIMEOUT_PARAM;

static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p)
	{
	if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
		{
		/* The reason we don't call SSL_CTX_remove_session() is to
		 * save on locking overhead */
		lh_delete(p->cache,s);
		SSL_SESSION_list_remove(p->ctx,s);
		s->not_resumable=1;
		if (p->ctx->remove_session_cb != NULL)
			p->ctx->remove_session_cb(p->ctx,s);
		SSL_SESSION_free(s);
		}
	}

static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION *, TIMEOUT_PARAM *)

void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
	{
	unsigned long i;
	TIMEOUT_PARAM tp;

	tp.ctx=s;
	tp.cache=s->sessions;
	if (tp.cache == NULL) return;
	tp.time=t;
	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
	i=tp.cache->down_load;
	tp.cache->down_load=0;
	lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp);
	tp.cache->down_load=i;
	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
	}

int ssl_clear_bad_session(SSL *s)
	{
	if (	(s->session != NULL) &&
		!(s->shutdown & SSL_SENT_SHUTDOWN) &&
		!(SSL_in_init(s) || SSL_in_before(s)))
		{
		SSL_CTX_remove_session(s->ctx,s->session);
		return(1);
		}
	else
		return(0);
	}

/* locked by SSL_CTX in the calling function */
static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
	{
	if ((s->next == NULL) || (s->prev == NULL)) return;

	if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail))
		{ /* last element in list */
		if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
			{ /* only one element in list */
			ctx->session_cache_head=NULL;
			ctx->session_cache_tail=NULL;
			}
		else
			{
			ctx->session_cache_tail=s->prev;
			s->prev->next=(SSL_SESSION *)&(ctx->session_cache_tail);
			}
		}
	else
		{
		if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
			{ /* first element in list */
			ctx->session_cache_head=s->next;
			s->next->prev=(SSL_SESSION *)&(ctx->session_cache_head);
			}
		else
			{ /* middle of list */
			s->next->prev=s->prev;
			s->prev->next=s->next;
			}
		}
	s->prev=s->next=NULL;
	}

static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
	{
	if ((s->next != NULL) && (s->prev != NULL))
		SSL_SESSION_list_remove(ctx,s);

	if (ctx->session_cache_head == NULL)
		{
		ctx->session_cache_head=s;
		ctx->session_cache_tail=s;
		s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
		s->next=(SSL_SESSION *)&(ctx->session_cache_tail);
		}
	else
		{
		s->next=ctx->session_cache_head;
		s->next->prev=s;
		s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
		ctx->session_cache_head=s;
		}
	}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-25 07:56:51 +0000