Fix no-ssl3 configuration option
[openssl.git] / ssl / s2_lib.c
index debaece1d2928bc637fc2e2e7a4b077ab9b1cf3d..41818dc6e87dfe49a3991748c9f4806090a7aba6 100644 (file)
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  * [including the GNU Public Licence.]
  */
+/* ====================================================================
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+ *
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+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
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+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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+ * This product includes cryptographic software written by Eric Young
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+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
 
 #include "ssl_locl.h"
 #ifndef OPENSSL_NO_SSL2
@@ -68,143 +121,172 @@ const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT;
 #define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))
 
 /* list of available SSLv2 ciphers (sorted by id) */
-OPENSSL_GLOBAL SSL_CIPHER ssl2_ciphers[]={
-/* NULL_WITH_MD5 v3 */
+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_SSLV2,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_eNULL,
+       SSL_MD5,
+       SSL_SSLV2,
        SSL_EXPORT|SSL_EXP40|SSL_STRONG_NONE,
        0,
        0,
        0,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
 #endif
+
 /* 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_SSLV2,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_RC4,
+       SSL_MD5,
+       SSL_SSLV2,
        SSL_NOT_EXP|SSL_MEDIUM,
        0,
        128,
        128,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
+
 /* 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_SSLV2,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_RC4,
+       SSL_MD5,
+       SSL_SSLV2,
        SSL_EXPORT|SSL_EXP40,
        SSL2_CF_5_BYTE_ENC,
        40,
        128,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
+
 /* 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_SSLV2,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_RC2,
+       SSL_MD5,
+       SSL_SSLV2,
        SSL_NOT_EXP|SSL_MEDIUM,
        0,
        128,
        128,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
+
 /* 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_kRSA,
+       SSL_aRSA,
+       SSL_RC2,
+       SSL_MD5,
+       SSL_SSLV2,
        SSL_EXPORT|SSL_EXP40,
        SSL2_CF_5_BYTE_ENC,
        40,
        128,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
-/* IDEA_128_CBC_WITH_MD5 */
+
 #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_SSLV2,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_IDEA,
+       SSL_MD5,
+       SSL_SSLV2,
        SSL_NOT_EXP|SSL_MEDIUM,
        0,
        128,
        128,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
 #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_SSLV2,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_DES,
+       SSL_MD5,
+       SSL_SSLV2,
        SSL_NOT_EXP|SSL_LOW,
        0,
        56,
        56,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
+
 /* 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_SSLV2,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_3DES,
+       SSL_MD5,
+       SSL_SSLV2,
        SSL_NOT_EXP|SSL_HIGH,
        0,
+       112,
        168,
-       168,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
-/* RC4_64_WITH_MD5 */
+
 #if 0
+/* RC4_64_WITH_MD5 */
        {
        1,
        SSL2_TXT_RC4_64_WITH_MD5,
        SSL2_CK_RC4_64_WITH_MD5,
-       SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2,
+       SSL_kRSA,
+       SSL_aRSA,
+       SSL_RC4,
+       SSL_MD5,
+       SSL_SSLV2,
        SSL_NOT_EXP|SSL_LOW,
        SSL2_CF_8_BYTE_ENC,
        64,
        64,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
 #endif
-/* NULL SSLeay (testing) */
+
 #if 0
+/* NULL SSLeay (testing) */
        {       
        0,
        SSL2_TXT_NULL,
        SSL2_CK_NULL,
        0,
+       0,
+       0,
+       0,
+       SSL_SSLV2,
        SSL_STRONG_NONE,
        0,
        0,
        0,
-       SSL_ALL_CIPHERS,
-       SSL_ALL_STRENGTHS,
        },
 #endif
 
@@ -221,7 +303,7 @@ int ssl2_num_ciphers(void)
        return(SSL2_NUM_CIPHERS);
        }
 
-SSL_CIPHER *ssl2_get_cipher(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]));
@@ -309,6 +391,8 @@ long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
        case SSL_CTRL_GET_SESSION_REUSED:
                ret=s->hit;
                break;
+       case SSL_CTRL_CHECK_PROTO_VERSION:
+               return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg);
        default:
                break;
                }
@@ -332,22 +416,17 @@ long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
 
 /* This function needs to check if the ciphers required are actually
  * available */
-SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
+const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
        {
-       SSL_CIPHER c,*cp;
+       SSL_CIPHER c;
+       const SSL_CIPHER *cp;
        unsigned long id;
 
        id=0x02000000L|((unsigned long)p[0]<<16L)|
                ((unsigned long)p[1]<<8L)|(unsigned long)p[2];
        c.id=id;
-       cp = (SSL_CIPHER *)OBJ_bsearch((char *)&c,
-               (char *)ssl2_ciphers,
-               SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER),
-               FP_ICC ssl_cipher_id_cmp);
-       if ((cp == NULL) || (cp->valid == 0))
-               return NULL;
-       else
-               return cp;
+       cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
+       return cp;
        }
 
 int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
@@ -357,7 +436,7 @@ int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
        if (p != NULL)
                {
                l=c->id;
-               if ((l & 0xff000000) != 0x02000000) return(0);
+               if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV) return(0);
                p[0]=((unsigned char)(l>>16L))&0xFF;
                p[1]=((unsigned char)(l>> 8L))&0xFF;
                p[2]=((unsigned char)(l     ))&0xFF;
@@ -372,6 +451,7 @@ int ssl2_generate_key_material(SSL *s)
        unsigned char *km;
        unsigned char c='0';
        const EVP_MD *md5;
+       int md_size;
 
        md5 = EVP_md5();
 
@@ -388,10 +468,12 @@ int ssl2_generate_key_material(SSL *s)
                SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
                return 0;
                }
-
-       for (i=0; i<s->s2->key_material_length; i += EVP_MD_size(md5))
+       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) + EVP_MD_size(md5)) >
+               if (((km - s->s2->key_material) + md_size) >
                                (int)sizeof(s->s2->key_material))
                        {
                        /* EVP_DigestFinal_ex() below would write beyond buffer */
@@ -410,7 +492,7 @@ int ssl2_generate_key_material(SSL *s)
                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 += EVP_MD_size(md5);
+               km += md_size;
                }
 
        EVP_MD_CTX_cleanup(&ctx);