Make i2r_sctlist static.
[openssl.git] / ssl / s2_lib.c
index 282d8bd..b37792f 100644 (file)
  * copied and put under another distribution licence
  * [including the GNU Public Licence.]
  */
+/* ====================================================================
+ * Copyright (c) 1998-2007 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).
+ *
+ */
 
-#include <stdio.h>
-#include "rsa.h"
-#include "objects.h"
 #include "ssl_locl.h"
+#ifndef OPENSSL_NO_SSL2
+#include <stdio.h>
+#include <openssl/objects.h>
+#include <openssl/evp.h>
+#include <openssl/md5.h>
 
-#ifndef NOPROTO
-static long ssl2_default_timeout(void );
-#else
-static long ssl2_default_timeout();
-#endif
-
-char *ssl2_version_str="SSLv2 part of OpenSSL 0.9.2 31-Dec-1998";
+const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT;
 
 #define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))
 
-SSL_CIPHER ssl2_ciphers[]={
-/* NULL_WITH_MD5 v3 */
+/* list of available SSLv2 ciphers (sorted by id) */
+OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[]={
 #if 0
+/* NULL_WITH_MD5 v3 */
        {
        1,
        SSL2_TXT_NULL_WITH_MD5,
        SSL2_CK_NULL_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_MD5|SSL_EXP40|SSL_SSLV2,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_eNULL,
+       SSL_MD5,
+       SSL_SSLV2,
+       SSL_EXPORT|SSL_EXP40|SSL_STRONG_NONE,
+       0,
+       0,
        0,
-       SSL_ALL_CIPHERS,
        },
 #endif
-/* RC4_128_EXPORT40_WITH_MD5 */
-       {
-       1,
-       SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
-       SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_EXP40|SSL_SSLV2,
-       SSL2_CF_5_BYTE_ENC,
-       SSL_ALL_CIPHERS,
-       },
+
 /* RC4_128_WITH_MD5 */
        {
        1,
        SSL2_TXT_RC4_128_WITH_MD5,
        SSL2_CK_RC4_128_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|_SSL_NOT_EXP|SSL_SSLV2|SSL_MEDIUM,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_RC4,
+       SSL_MD5,
+       SSL_SSLV2,
+       SSL_NOT_EXP|SSL_MEDIUM,
        0,
-       SSL_ALL_CIPHERS,
+       128,
+       128,
        },
-/* RC2_128_CBC_EXPORT40_WITH_MD5 */
+
+/* RC4_128_EXPORT40_WITH_MD5 */
        {
        1,
-       SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
-       SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_EXP40|SSL_SSLV2,
+       SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
+       SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_RC4,
+       SSL_MD5,
+       SSL_SSLV2,
+       SSL_EXPORT|SSL_EXP40,
        SSL2_CF_5_BYTE_ENC,
-       SSL_ALL_CIPHERS,
+       40,
+       128,
        },
+
 /* RC2_128_CBC_WITH_MD5 */
        {
        1,
        SSL2_TXT_RC2_128_CBC_WITH_MD5,
        SSL2_CK_RC2_128_CBC_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|_SSL_NOT_EXP|SSL_SSLV2|SSL_MEDIUM,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_RC2,
+       SSL_MD5,
+       SSL_SSLV2,
+       SSL_NOT_EXP|SSL_MEDIUM,
        0,
-       SSL_ALL_CIPHERS,
+       128,
+       128,
+       },
+
+/* RC2_128_CBC_EXPORT40_WITH_MD5 */
+       {
+       1,
+       SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
+       SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_RC2,
+       SSL_MD5,
+       SSL_SSLV2,
+       SSL_EXPORT|SSL_EXP40,
+       SSL2_CF_5_BYTE_ENC,
+       40,
+       128,
        },
+
+#ifndef OPENSSL_NO_IDEA
 /* IDEA_128_CBC_WITH_MD5 */
        {
        1,
        SSL2_TXT_IDEA_128_CBC_WITH_MD5,
        SSL2_CK_IDEA_128_CBC_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_IDEA|SSL_MD5|_SSL_NOT_EXP|SSL_SSLV2|SSL_MEDIUM,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_IDEA,
+       SSL_MD5,
+       SSL_SSLV2,
+       SSL_NOT_EXP|SSL_MEDIUM,
        0,
-       SSL_ALL_CIPHERS,
+       128,
+       128,
        },
+#endif
+
 /* DES_64_CBC_WITH_MD5 */
        {
        1,
        SSL2_TXT_DES_64_CBC_WITH_MD5,
        SSL2_CK_DES_64_CBC_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_DES|SSL_MD5|_SSL_NOT_EXP|SSL_SSLV2|SSL_LOW,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_DES,
+       SSL_MD5,
+       SSL_SSLV2,
+       SSL_NOT_EXP|SSL_LOW,
        0,
-       SSL_ALL_CIPHERS,
+       56,
+       56,
        },
+
 /* DES_192_EDE3_CBC_WITH_MD5 */
        {
        1,
        SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
        SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_MD5|_SSL_NOT_EXP|SSL_SSLV2|SSL_HIGH,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_3DES,
+       SSL_MD5,
+       SSL_SSLV2,
+       SSL_NOT_EXP|SSL_HIGH,
        0,
-       SSL_ALL_CIPHERS,
+       168,
+       168,
        },
+
+#if 0
 /* RC4_64_WITH_MD5 */
-#if 1
        {
        1,
        SSL2_TXT_RC4_64_WITH_MD5,
        SSL2_CK_RC4_64_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2|SSL_LOW,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_RC4,
+       SSL_MD5,
+       SSL_SSLV2,
+       SSL_NOT_EXP|SSL_LOW,
        SSL2_CF_8_BYTE_ENC,
-       SSL_ALL_CIPHERS,
+       64,
+       64,
        },
 #endif
-/* NULL SSLeay (testing) */
+
 #if 0
+/* NULL SSLeay (testing) */
        {       
        0,
        SSL2_TXT_NULL,
        SSL2_CK_NULL,
        0,
-       SSL_ALL_CIPHERS,
+       0,
+       0,
+       0,
+       SSL_SSLV2,
+       SSL_STRONG_NONE,
+       0,
+       0,
+       0,
        },
 #endif
 
 /* end of list :-) */
        };
 
-static SSL_METHOD SSLv2_data= {
-       SSL2_VERSION,
-       ssl2_new,       /* local */
-       ssl2_clear,     /* local */
-       ssl2_free,      /* local */
-       ssl_undefined_function,
-       ssl_undefined_function,
-       ssl2_read,
-       ssl2_peek,
-       ssl2_write,
-       ssl2_shutdown,
-       ssl_ok, /* NULL - renegotiate */
-       ssl_ok, /* NULL - check renegotiate */
-       ssl2_ctrl,      /* local */
-       ssl2_ctx_ctrl,  /* local */
-       ssl2_get_cipher_by_char,
-       ssl2_put_cipher_by_char,
-       ssl2_pending,
-       ssl2_num_ciphers,
-       ssl2_get_cipher,
-       ssl_bad_method,
-       ssl2_default_timeout,
-       &ssl3_undef_enc_method,
-       };
-
-static long ssl2_default_timeout()
+long ssl2_default_timeout(void)
        {
        return(300);
        }
 
-SSL_METHOD *sslv2_base_method()
-       {
-       return(&SSLv2_data);
-       }
-
-int ssl2_num_ciphers()
+int ssl2_num_ciphers(void)
        {
        return(SSL2_NUM_CIPHERS);
        }
 
-SSL_CIPHER *ssl2_get_cipher(u)
-unsigned int u;
+const SSL_CIPHER *ssl2_get_cipher(unsigned int u)
        {
        if (u < SSL2_NUM_CIPHERS)
                return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u]));
@@ -220,24 +311,28 @@ unsigned int u;
                return(NULL);
        }
 
-int ssl2_pending(s)
-SSL *s;
+int ssl2_pending(const SSL *s)
        {
-       return(s->s2->ract_data_length);
+       return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
        }
 
-int ssl2_new(s)
-SSL *s;
+int ssl2_new(SSL *s)
        {
-       SSL2_CTX *s2;
+       SSL2_STATE *s2;
 
-       if ((s2=(SSL2_CTX *)Malloc(sizeof(SSL2_CTX))) == NULL) goto err;
-       memset(s2,0,sizeof(SSL2_CTX));
+       if ((s2=OPENSSL_malloc(sizeof *s2)) == NULL) goto err;
+       memset(s2,0,sizeof *s2);
 
-       if ((s2->rbuf=(unsigned char *)Malloc(
-               SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
-       if ((s2->wbuf=(unsigned char *)Malloc(
+#if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
+#  error "assertion failed"
+#endif
+
+       if ((s2->rbuf=OPENSSL_malloc(
                SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
+       /* wbuf needs one byte more because when using two-byte headers,
+        * we leave the first byte unused in do_ssl_write (s2_pkt.c) */
+       if ((s2->wbuf=OPENSSL_malloc(
+               SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+3)) == NULL) goto err;
        s->s2=s2;
 
        ssl2_clear(s);
@@ -245,33 +340,31 @@ SSL *s;
 err:
        if (s2 != NULL)
                {
-               if (s2->wbuf != NULL) Free(s2->wbuf);
-               if (s2->rbuf != NULL) Free(s2->rbuf);
-               Free(s2);
+               if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
+               if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
+               OPENSSL_free(s2);
                }
        return(0);
        }
 
-void ssl2_free(s)
-SSL *s;
+void ssl2_free(SSL *s)
        {
-       SSL2_CTX *s2;
+       SSL2_STATE *s2;
 
        if(s == NULL)
            return;
 
        s2=s->s2;
-       if (s2->rbuf != NULL) Free(s2->rbuf);
-       if (s2->wbuf != NULL) Free(s2->wbuf);
-       memset(s2,0,sizeof(SSL2_CTX));
-       Free(s2);
+       if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
+       if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
+       OPENSSL_cleanse(s2,sizeof *s2);
+       OPENSSL_free(s2);
        s->s2=NULL;
        }
 
-void ssl2_clear(s)
-SSL *s;
+void ssl2_clear(SSL *s)
        {
-       SSL2_CTX *s2;
+       SSL2_STATE *s2;
        unsigned char *rbuf,*wbuf;
 
        s2=s->s2;
@@ -279,7 +372,7 @@ SSL *s;
        rbuf=s2->rbuf;
        wbuf=s2->wbuf;
 
-       memset(s2,0,sizeof(SSL2_CTX));
+       memset(s2,0,sizeof *s2);
 
        s2->rbuf=rbuf;
        s2->wbuf=wbuf;
@@ -289,11 +382,7 @@ SSL *s;
        s->packet_length=0;
        }
 
-long ssl2_ctrl(s,cmd,larg,parg)
-SSL *s;
-int cmd;
-long larg;
-char *parg;
+long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
        {
        int ret=0;
 
@@ -308,54 +397,37 @@ char *parg;
        return(ret);
        }
 
-long ssl2_ctx_ctrl(ctx,cmd,larg,parg)
-SSL_CTX *ctx;
-int cmd;
-long larg;
-char *parg;
+long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
+       {
+       return(0);
+       }
+
+long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
+       {
+       return(0);
+       }
+
+long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
        {
        return(0);
        }
 
 /* This function needs to check if the ciphers required are actually
  * available */
-SSL_CIPHER *ssl2_get_cipher_by_char(p)
-const unsigned char *p;
+const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
        {
-       static int init=1;
-       static SSL_CIPHER *sorted[SSL2_NUM_CIPHERS];
-       SSL_CIPHER c,*cp= &c,**cpp;
+       SSL_CIPHER c;
+       const SSL_CIPHER *cp;
        unsigned long id;
-       int i;
-
-       if (init)
-               {
-               init=0;
-
-               for (i=0; i<SSL2_NUM_CIPHERS; i++)
-                       sorted[i]= &(ssl2_ciphers[i]);
-
-               qsort(  (char *)sorted,
-                       SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER *),
-                       FP_ICC ssl_cipher_ptr_id_cmp);
-               }
 
        id=0x02000000L|((unsigned long)p[0]<<16L)|
                ((unsigned long)p[1]<<8L)|(unsigned long)p[2];
        c.id=id;
-       cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
-               (char *)sorted,
-               SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER *),
-               (int (*)())ssl_cipher_ptr_id_cmp);
-       if ((cpp == NULL) || !(*cpp)->valid)
-               return(NULL);
-       else
-               return(*cpp);
+       cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
+       return cp;
        }
 
-int ssl2_put_cipher_by_char(c,p)
-const SSL_CIPHER *c;
-unsigned char *p;
+int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
        {
        long l;
 
@@ -370,32 +442,62 @@ unsigned char *p;
        return(3);
        }
 
-void ssl2_generate_key_material(s)
-SSL *s;
+int ssl2_generate_key_material(SSL *s)
        {
        unsigned int i;
-       MD5_CTX ctx;
+       EVP_MD_CTX ctx;
        unsigned char *km;
        unsigned char c='0';
+       const EVP_MD *md5;
+       int md_size;
+
+       md5 = EVP_md5();
 
+#ifdef CHARSET_EBCDIC
+       c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0',
+                               see SSLv2 docu */
+#endif
+       EVP_MD_CTX_init(&ctx);
        km=s->s2->key_material;
-       for (i=0; i<s->s2->key_material_length; i+=MD5_DIGEST_LENGTH)
-               {
-               MD5_Init(&ctx);
 
-               MD5_Update(&ctx,s->session->master_key,s->session->master_key_length);
-               MD5_Update(&ctx,(unsigned char *)&c,1);
+       if (s->session->master_key_length < 0 ||
+                       s->session->master_key_length > (int)sizeof(s->session->master_key))
+               {
+               SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
+               return 0;
+               }
+       md_size = EVP_MD_size(md5);
+       if (md_size < 0)
+           return 0;
+       for (i=0; i<s->s2->key_material_length; i += md_size)
+               {
+               if (((km - s->s2->key_material) + md_size) >
+                               (int)sizeof(s->s2->key_material))
+                       {
+                       /* EVP_DigestFinal_ex() below would write beyond buffer */
+                       SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
+                       return 0;
+                       }
+
+               EVP_DigestInit_ex(&ctx, md5, NULL);
+
+               OPENSSL_assert(s->session->master_key_length >= 0
+                   && s->session->master_key_length
+                   < (int)sizeof(s->session->master_key));
+               EVP_DigestUpdate(&ctx,s->session->master_key,s->session->master_key_length);
+               EVP_DigestUpdate(&ctx,&c,1);
                c++;
-               MD5_Update(&ctx,s->s2->challenge,s->s2->challenge_length);
-               MD5_Update(&ctx,s->s2->conn_id,s->s2->conn_id_length);
-               MD5_Final(km,&ctx);
-               km+=MD5_DIGEST_LENGTH;
+               EVP_DigestUpdate(&ctx,s->s2->challenge,s->s2->challenge_length);
+               EVP_DigestUpdate(&ctx,s->s2->conn_id,s->s2->conn_id_length);
+               EVP_DigestFinal_ex(&ctx,km,NULL);
+               km += md_size;
                }
+
+       EVP_MD_CTX_cleanup(&ctx);
+       return 1;
        }
 
-void ssl2_return_error(s,err)
-SSL *s;
-int err;
+void ssl2_return_error(SSL *s, int err)
        {
        if (!s->error)
                {
@@ -407,10 +509,9 @@ int err;
        }
 
 
-void ssl2_write_error(s)
-SSL *s;
+void ssl2_write_error(SSL *s)
        {
-       char buf[3];
+       unsigned char buf[3];
        int i,error;
 
        buf[0]=SSL2_MT_ERROR;
@@ -418,23 +519,35 @@ SSL *s;
        buf[2]=(s->error_code)&0xff;
 
 /*     state=s->rwstate;*/
-       error=s->error;
+
+       error=s->error; /* number of bytes left to write */
        s->error=0;
+       OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
        i=ssl2_write(s,&(buf[3-error]),error);
+
 /*     if (i == error) s->rwstate=state; */
 
        if (i < 0)
                s->error=error;
-       else if (i != s->error)
+       else
+               {
                s->error=error-i;
-       /* else
-               s->error=0; */
+
+               if (s->error == 0)
+                       if (s->msg_callback)
+                               s->msg_callback(1, s->version, 0, buf, 3, s, s->msg_callback_arg); /* ERROR */
+               }
        }
 
-int ssl2_shutdown(s)
-SSL *s;
+int ssl2_shutdown(SSL *s)
        {
        s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
        return(1);
        }
+#else /* !OPENSSL_NO_SSL2 */
+
+# if PEDANTIC
+static void *dummy=&dummy;
+# endif
 
+#endif