Let ssl_get_prev_session reliably work in multi-threaded settings.
[openssl.git] / ssl / s3_srvr.c
index a4c0744488405d4ffbb97cf774a2d39e770bb463..e003d88357461aa7c9a0b661b9af3a215430d80a 100644 (file)
 #define REUSE_CIPHER_BUG
 
 #include <stdio.h>
-#include "buffer.h"
-#include "rand.h"
-#include "objects.h"
-#include "evp.h"
-#include "x509.h"
+#include <openssl/buffer.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+#include <openssl/md5.h>
+#include <openssl/sha.h>
+#include <openssl/evp.h>
+#include <openssl/x509.h>
 #include "ssl_locl.h"
 
-#define BREAK  break
-/* SSLerr(SSL_F_SSL3_ACCEPT,ERR_R_MALLOC_FAILURE);
- * SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
- * SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
- * SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_MALLOC_FAILURE);
- * SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
- */
-
-#ifndef NOPROTO
 static SSL_METHOD *ssl3_get_server_method(int ver);
 static int ssl3_get_client_hello(SSL *s);
 static int ssl3_send_server_hello(SSL *s);
@@ -86,23 +79,7 @@ static int ssl3_get_client_key_exchange(SSL *s);
 static int ssl3_get_client_certificate(SSL *s);
 static int ssl3_send_hello_request(SSL *s);
 
-#else
-
-static SSL_METHOD *ssl3_get_server_method();
-static int ssl3_get_client_hello();
-static int ssl3_send_server_hello();
-static int ssl3_send_server_key_exchange();
-static int ssl3_send_certificate_request();
-static int ssl3_send_server_done();
-static int ssl3_get_cert_verify();
-static int ssl3_get_client_key_exchange();
-static int ssl3_get_client_certificate();
-static int ssl3_send_hello_request();
-
-#endif
-
-static SSL_METHOD *ssl3_get_server_method(ver)
-int ver;
+static SSL_METHOD *ssl3_get_server_method(int ver)
        {
        if (ver == SSL3_VERSION)
                return(SSLv3_server_method());
@@ -110,31 +87,29 @@ int ver;
                return(NULL);
        }
 
-SSL_METHOD *SSLv3_server_method()
+SSL_METHOD *SSLv3_server_method(void)
        {
        static int init=1;
        static SSL_METHOD SSLv3_server_data;
 
        if (init)
                {
-               init=0;
                memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
                        sizeof(SSL_METHOD));
                SSLv3_server_data.ssl_accept=ssl3_accept;
                SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
+               init=0;
                }
        return(&SSLv3_server_data);
        }
 
-int ssl3_accept(s)
-SSL *s;
+int ssl3_accept(SSL *s)
        {
        BUF_MEM *buf;
        unsigned long l,Time=time(NULL);
        void (*cb)()=NULL;
        long num1;
        int ret= -1;
-       CERT *ct;
        int new_state,state,skip=0;
 
        RAND_seed(&Time,sizeof(Time));
@@ -150,17 +125,11 @@ SSL *s;
        if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
        s->in_handshake++;
 
-#ifdef undef
-       /* FIX THIS EAY EAY EAY */
-       /* we don't actually need a cert, we just need a cert or a DH_tmp */
-       if (((s->session == NULL) || (s->session->cert == NULL)) &&
-               (s->cert == NULL))
+       if (s->cert == NULL)
                {
                SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
-               ret= -1;
-               goto end;
+               return(-1);
                }
-#endif
 
        for (;;)
                {
@@ -285,20 +254,6 @@ SSL *s;
                case SSL3_ST_SW_KEY_EXCH_A:
                case SSL3_ST_SW_KEY_EXCH_B:
                        l=s->s3->tmp.new_cipher->algorithms;
-                       if (s->session->cert == NULL)
-                               {
-                               if (s->cert != NULL)
-                                       {
-                                       CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
-                                       s->session->cert=s->cert;
-                                       }
-                               else
-                                       {
-                                       CRYPTO_add(&s->ctx->default_cert->references,1,CRYPTO_LOCK_SSL_CERT);
-                                       s->session->cert=s->ctx->default_cert;
-                                       }
-                               }
-                       ct=s->session->cert;
 
                        /* clear this, it may get reset by
                         * send_server_key_exchange */
@@ -309,16 +264,16 @@ SSL *s;
 
                        /* only send if a DH key exchange, fortezza or
                         * RSA but we have a sign only certificate */
-                       if ( s->s3->tmp.use_rsa_tmp ||
-                           (l & (SSL_DH|SSL_kFZA)) ||
-                           ((l & SSL_kRSA) &&
-                            ((ct->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)||
-                             ((l & SSL_EXPORT) &&
-                              (EVP_PKEY_size(ct->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > 512)
-                             )
-                            )
+                       if (s->s3->tmp.use_rsa_tmp
+                           || (l & (SSL_DH|SSL_kFZA))
+                           || ((l & SSL_kRSA)
+                               && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
+                                   || (SSL_IS_EXPORT(l)
+                                       && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
+                                       )
+                                   )
+                               )
                            )
-                          )
                                {
                                ret=ssl3_send_server_key_exchange(s);
                                if (ret <= 0) goto end;
@@ -523,8 +478,7 @@ end:
        return(ret);
        }
 
-static int ssl3_send_hello_request(s)
-SSL *s;
+static int ssl3_send_hello_request(SSL *s)
        {
        unsigned char *p;
 
@@ -546,8 +500,7 @@ SSL *s;
        return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
        }
 
-static int ssl3_get_client_hello(s)
-SSL *s;
+static int ssl3_get_client_hello(SSL *s)
        {
        int i,j,ok,al,ret= -1;
        long n;
@@ -555,7 +508,7 @@ SSL *s;
        unsigned char *p,*d,*q;
        SSL_CIPHER *c;
        SSL_COMP *comp=NULL;
-       STACK *ciphers=NULL;
+       STACK_OF(SSL_CIPHER) *ciphers=NULL;
 
        /* We do this so that we will respond with our native type.
         * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
@@ -604,7 +557,9 @@ SSL *s;
                        { /* previous session */
                        s->hit=1;
                        }
-               else
+               else if (i == -1)
+                       goto err;
+               else /* i == 0 */
                        {
                        if (!ssl_get_new_session(s,1))
                                goto err;
@@ -643,9 +598,9 @@ SSL *s;
 #ifdef CIPHER_DEBUG
                printf("client sent %d ciphers\n",sk_num(ciphers));
 #endif
-               for (i=0; i<sk_num(ciphers); i++)
+               for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
                        {
-                       c=(SSL_CIPHER *)sk_value(ciphers,i);
+                       c=sk_SSL_CIPHER_value(ciphers,i);
 #ifdef CIPHER_DEBUG
                        printf("client [%2d of %2d]:%s\n",
                                i,sk_num(ciphers),SSL_CIPHER_get_name(c));
@@ -658,11 +613,11 @@ SSL *s;
                        }
                if (j == 0)
                        {
-                       if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_num(ciphers) == 1))
+                       if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
                                {
                                /* Very bad for multi-threading.... */
-                               s->session->cipher=
-                                       (SSL_CIPHER *)sk_value(ciphers,0);
+                               s->session->cipher=sk_SSL_CIPHER_value(ciphers,
+                                                                      0);
                                }
                        else
                                {
@@ -700,10 +655,10 @@ SSL *s;
                { /* See if we have a match */
                int m,nn,o,v,done=0;
 
-               nn=sk_num(s->ctx->comp_methods);
+               nn=sk_SSL_COMP_num(s->ctx->comp_methods);
                for (m=0; m<nn; m++)
                        {
-                       comp=(SSL_COMP *)sk_value(s->ctx->comp_methods,m);
+                       comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
                        v=comp->id;
                        for (o=0; o<i; o++)
                                {
@@ -741,7 +696,7 @@ SSL *s;
                {
                s->session->compress_meth=(comp == NULL)?0:comp->id;
                if (s->session->ciphers != NULL)
-                       sk_free(s->session->ciphers);
+                       sk_SSL_CIPHER_free(s->session->ciphers);
                s->session->ciphers=ciphers;
                if (ciphers == NULL)
                        {
@@ -751,7 +706,7 @@ SSL *s;
                        }
                ciphers=NULL;
                c=ssl3_choose_cipher(s,s->session->ciphers,
-                       ssl_get_ciphers_by_id(s));
+                                    ssl_get_ciphers_by_id(s));
 
                if (c == NULL)
                        {
@@ -765,19 +720,19 @@ SSL *s;
                {
                /* Session-id reuse */
 #ifdef REUSE_CIPHER_BUG
-               STACK *sk;
+               STACK_OF(SSL_CIPHER) *sk;
                SSL_CIPHER *nc=NULL;
                SSL_CIPHER *ec=NULL;
 
                if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
                        {
                        sk=s->session->ciphers;
-                       for (i=0; i<sk_num(sk); i++)
+                       for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
                                {
-                               c=(SSL_CIPHER *)sk_value(sk,i);
+                               c=sk_SSL_CIPHER_value(sk,i);
                                if (c->algorithms & SSL_eNULL)
                                        nc=c;
-                               if (c->algorithms & SSL_EXP)
+                               if (SSL_C_IS_EXPORT(c))
                                        ec=c;
                                }
                        if (nc != NULL)
@@ -810,12 +765,11 @@ f_err:
                ssl3_send_alert(s,SSL3_AL_FATAL,al);
                }
 err:
-       if (ciphers != NULL) sk_free(ciphers);
+       if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
        return(ret);
        }
 
-static int ssl3_send_server_hello(s)
-SSL *s;
+static int ssl3_send_server_hello(SSL *s)
        {
        unsigned char *buf;
        unsigned char *p,*d;
@@ -881,8 +835,7 @@ SSL *s;
        return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
        }
 
-static int ssl3_send_server_done(s)
-SSL *s;
+static int ssl3_send_server_done(SSL *s)
        {
        unsigned char *p;
 
@@ -906,8 +859,7 @@ SSL *s;
        return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
        }
 
-static int ssl3_send_server_key_exchange(s)
-SSL *s;
+static int ssl3_send_server_key_exchange(SSL *s)
        {
 #ifndef NO_RSA
        unsigned char *q;
@@ -932,7 +884,7 @@ SSL *s;
        if (s->state == SSL3_ST_SW_KEY_EXCH_A)
                {
                type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
-               cert=s->session->cert;
+               cert=s->cert;
 
                buf=s->init_buf;
 
@@ -942,11 +894,11 @@ SSL *s;
                if (type & SSL_kRSA)
                        {
                        rsa=cert->rsa_tmp;
-                       if ((rsa == NULL) && (s->ctx->default_cert->rsa_tmp_cb != NULL))
+                       if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
                                {
-                               rsa=s->ctx->default_cert->rsa_tmp_cb(s,
-                                       !(s->s3->tmp.new_cipher->algorithms
-                                         &SSL_NOT_EXP));
+                               rsa=s->cert->rsa_tmp_cb(s,
+                                     SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
+                                     SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
                                CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
                                cert->rsa_tmp=rsa;
                                }
@@ -966,10 +918,10 @@ SSL *s;
                        if (type & SSL_kEDH)
                        {
                        dhp=cert->dh_tmp;
-                       if ((dhp == NULL) && (cert->dh_tmp_cb != NULL))
-                               dhp=cert->dh_tmp_cb(s,
-                                       !(s->s3->tmp.new_cipher->algorithms
-                                         &SSL_NOT_EXP));
+                       if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
+                               dhp=s->cert->dh_tmp_cb(s,
+                                     !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
+                                     SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
                        if (dhp == NULL)
                                {
                                al=SSL_AD_HANDSHAKE_FAILURE;
@@ -1131,12 +1083,11 @@ err:
        return(-1);
        }
 
-static int ssl3_send_certificate_request(s)
-SSL *s;
+static int ssl3_send_certificate_request(SSL *s)
        {
        unsigned char *p,*d;
        int i,j,nl,off,n;
-       STACK *sk=NULL;
+       STACK_OF(X509_NAME) *sk=NULL;
        X509_NAME *name;
        BUF_MEM *buf;
 
@@ -1161,9 +1112,9 @@ SSL *s;
                nl=0;
                if (sk != NULL)
                        {
-                       for (i=0; i<sk_num(sk); i++)
+                       for (i=0; i<sk_X509_NAME_num(sk); i++)
                                {
-                               name=(X509_NAME *)sk_value(sk,i);
+                               name=sk_X509_NAME_value(sk,i);
                                j=i2d_X509_NAME(name,NULL);
                                if (!BUF_MEM_grow(buf,4+n+j+2))
                                        {
@@ -1209,15 +1160,16 @@ err:
        return(-1);
        }
 
-static int ssl3_get_client_key_exchange(s)
-SSL *s;
+static int ssl3_get_client_key_exchange(SSL *s)
        {
        int i,al,ok;
        long n;
        unsigned long l;
        unsigned char *p;
+#ifndef NO_RSA
        RSA *rsa=NULL;
        EVP_PKEY *pkey=NULL;
+#endif
 #ifndef NO_DH
        BIGNUM *pub=NULL;
        DH *dh_srvr;
@@ -1241,12 +1193,8 @@ SSL *s;
                /* FIX THIS UP EAY EAY EAY EAY */
                if (s->s3->tmp.use_rsa_tmp)
                        {
-                       if ((s->session->cert != NULL) &&
-                               (s->session->cert->rsa_tmp != NULL))
-                               rsa=s->session->cert->rsa_tmp;
-                       else if ((s->ctx->default_cert != NULL) &&
-                               (s->ctx->default_cert->rsa_tmp != NULL))
-                               rsa=s->ctx->default_cert->rsa_tmp;
+                       if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
+                               rsa=s->cert->rsa_tmp;
                        /* Don't do a callback because rsa_tmp should
                         * be sent already */
                        if (rsa == NULL)
@@ -1416,8 +1364,7 @@ err:
        return(-1);
        }
 
-static int ssl3_get_cert_verify(s)
-SSL *s;
+static int ssl3_get_cert_verify(SSL *s)
        {
        EVP_PKEY *pkey=NULL;
        unsigned char *p;
@@ -1555,14 +1502,13 @@ end:
        return(ret);
        }
 
-static int ssl3_get_client_certificate(s)
-SSL *s;
+static int ssl3_get_client_certificate(SSL *s)
        {
        int i,ok,al,ret= -1;
        X509 *x=NULL;
        unsigned long l,nc,llen,n;
        unsigned char *p,*d,*q;
-       STACK *sk=NULL;
+       STACK_OF(X509) *sk=NULL;
 
        n=ssl3_get_message(s,
                SSL3_ST_SR_CERT_A,
@@ -1605,7 +1551,7 @@ SSL *s;
                }
        d=p=(unsigned char *)s->init_buf->data;
 
-       if ((sk=sk_new_null()) == NULL)
+       if ((sk=sk_X509_new_null()) == NULL)
                {
                SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
                goto err;
@@ -1641,7 +1587,7 @@ SSL *s;
                        SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
                        goto f_err;
                        }
-               if (!sk_push(sk,(char *)x))
+               if (!sk_X509_push(sk,x))
                        {
                        SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
                        goto err;
@@ -1650,7 +1596,7 @@ SSL *s;
                nc+=l+3;
                }
 
-       if (sk_num(sk) <= 0)
+       if (sk_X509_num(sk) <= 0)
                {
                /* TLS does not mind 0 certs returned */
                if (s->version == SSL3_VERSION)
@@ -1679,10 +1625,26 @@ SSL *s;
                        }
                }
 
-       /* This should not be needed */
-       if (s->session->peer != NULL)
+       if (s->session->peer != NULL) /* This should not be needed */
                X509_free(s->session->peer);
-       s->session->peer=(X509 *)sk_shift(sk);
+       s->session->peer=sk_X509_shift(sk);
+
+       /* With the current implementation, sess_cert will always be NULL
+        * when we arrive here. */
+       if (s->session->sess_cert == NULL)
+               {
+               s->session->sess_cert = ssl_sess_cert_new();
+               if (s->session->sess_cert == NULL)
+                       {
+                       SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
+                       goto err;
+                       }
+               }
+       if (s->session->sess_cert->cert_chain != NULL)
+               sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
+       s->session->sess_cert->cert_chain=sk;
+
+       sk=NULL;
 
        ret=1;
        if (0)
@@ -1692,12 +1654,11 @@ f_err:
                }
 err:
        if (x != NULL) X509_free(x);
-       if (sk != NULL) sk_pop_free(sk,X509_free);
+       if (sk != NULL) sk_X509_pop_free(sk,X509_free);
        return(ret);
        }
 
-int ssl3_send_server_certificate(s)
-SSL *s;
+int ssl3_send_server_certificate(SSL *s)
        {
        unsigned long l;
        X509 *x;