X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fs23_clnt.c;h=b21308b6f24268252f5cd4fb46a0eab31ce3ffa7;hp=d74245384ad0f10197174d47179d6e9709e1679c;hb=3f19bbf4e3ff4e135f4247a3f5ab9762a030b1f0;hpb=cf82191d77a0a8f77894a65185b6f7a4b3855d6c diff --git a/ssl/s23_clnt.c b/ssl/s23_clnt.c index d74245384a..b21308b6f2 100644 --- a/ssl/s23_clnt.c +++ b/ssl/s23_clnt.c @@ -57,11 +57,11 @@ */ #include +#include "ssl_locl.h" #include #include #include #include -#include "ssl_locl.h" static SSL_METHOD *ssl23_get_client_method(int ver); static int ssl23_client_hello(SSL *s); @@ -87,20 +87,27 @@ SSL_METHOD *SSLv23_client_method(void) if (init) { - memcpy((char *)&SSLv23_client_data, - (char *)sslv23_base_method(),sizeof(SSL_METHOD)); - SSLv23_client_data.ssl_connect=ssl23_connect; - SSLv23_client_data.get_ssl_method=ssl23_get_client_method; - init=0; + CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD); + + if (init) + { + memcpy((char *)&SSLv23_client_data, + (char *)sslv23_base_method(),sizeof(SSL_METHOD)); + SSLv23_client_data.ssl_connect=ssl23_connect; + SSLv23_client_data.get_ssl_method=ssl23_get_client_method; + init=0; + } + + CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD); } return(&SSLv23_client_data); } int ssl23_connect(SSL *s) { - BUF_MEM *buf; + BUF_MEM *buf=NULL; unsigned long Time=time(NULL); - void (*cb)()=NULL; + void (*cb)(const SSL *ssl,int type,int val)=NULL; int ret= -1; int new_state,state; @@ -152,6 +159,7 @@ int ssl23_connect(SSL *s) goto end; } s->init_buf=buf; + buf=NULL; } if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } @@ -200,6 +208,8 @@ int ssl23_connect(SSL *s) } end: s->in_handshake--; + if (buf != NULL) + BUF_MEM_free(buf); if (cb != NULL) cb(s,SSL_CB_CONNECT_EXIT,ret); return(ret); @@ -210,9 +220,28 @@ static int ssl23_client_hello(SSL *s) { unsigned char *buf; unsigned char *p,*d; - int i,ch_len; + int i,j,ch_len; + unsigned long Time,l; + int ssl2_compat; + int version = 0, version_major, version_minor; + SSL_COMP *comp; int ret; + ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1; + + if (!(s->options & SSL_OP_NO_TLSv1)) + { + version = TLS1_VERSION; + } + else if (!(s->options & SSL_OP_NO_SSLv3)) + { + version = SSL3_VERSION; + } + else if (!(s->options & SSL_OP_NO_SSLv2)) + { + version = SSL2_VERSION; + } + buf=(unsigned char *)s->init_buf->data; if (s->state == SSL23_ST_CW_CLNT_HELLO_A) { @@ -225,30 +254,25 @@ static int ssl23_client_hello(SSL *s) #endif p=s->s3->client_random; - RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE); + Time=time(NULL); /* Time */ + l2n(Time,p); + if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) + return -1; - /* Do the message type and length last */ - d= &(buf[2]); - p=d+9; - - *(d++)=SSL2_MT_CLIENT_HELLO; - if (!(s->options & SSL_OP_NO_TLSv1)) + if (version == TLS1_VERSION) { - *(d++)=TLS1_VERSION_MAJOR; - *(d++)=TLS1_VERSION_MINOR; - s->client_version=TLS1_VERSION; + version_major = TLS1_VERSION_MAJOR; + version_minor = TLS1_VERSION_MINOR; } - else if (!(s->options & SSL_OP_NO_SSLv3)) + else if (version == SSL3_VERSION) { - *(d++)=SSL3_VERSION_MAJOR; - *(d++)=SSL3_VERSION_MINOR; - s->client_version=SSL3_VERSION; + version_major = SSL3_VERSION_MAJOR; + version_minor = SSL3_VERSION_MINOR; } - else if (!(s->options & SSL_OP_NO_SSLv2)) + else if (version == SSL2_VERSION) { - *(d++)=SSL2_VERSION_MAJOR; - *(d++)=SSL2_VERSION_MINOR; - s->client_version=SSL2_VERSION; + version_major = SSL2_VERSION_MAJOR; + version_minor = SSL2_VERSION_MINOR; } else { @@ -256,57 +280,153 @@ static int ssl23_client_hello(SSL *s) return(-1); } - /* Ciphers supported */ - i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p); - if (i == 0) + s->client_version = version; + + if (ssl2_compat) { - /* no ciphers */ - SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); - return(-1); - } - s2n(i,d); - p+=i; + /* create SSL 2.0 compatible Client Hello */ - /* put in the session-id, zero since there is no - * reuse. */ + /* two byte record header will be written last */ + d = &(buf[2]); + p = d + 9; /* leave space for message type, version, individual length fields */ + + *(d++) = SSL2_MT_CLIENT_HELLO; + *(d++) = version_major; + *(d++) = version_minor; + + /* Ciphers supported */ + i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0); + if (i == 0) + { + /* no ciphers */ + SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); + return -1; + } + s2n(i,d); + p+=i; + + /* put in the session-id length (zero since there is no reuse) */ #if 0 - s->session->session_id_length=0; + s->session->session_id_length=0; #endif - s2n(0,d); - - if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) - ch_len=SSL2_CHALLENGE_LENGTH; + s2n(0,d); + + if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) + ch_len=SSL2_CHALLENGE_LENGTH; + else + ch_len=SSL2_MAX_CHALLENGE_LENGTH; + + /* write out sslv2 challenge */ + if (SSL3_RANDOM_SIZE < ch_len) + i=SSL3_RANDOM_SIZE; + else + i=ch_len; + s2n(i,d); + memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE); + if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0) + return -1; + + memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); + p+=i; + + i= p- &(buf[2]); + buf[0]=((i>>8)&0xff)|0x80; + buf[1]=(i&0xff); + + /* number of bytes to write */ + s->init_num=i+2; + s->init_off=0; + + ssl3_finish_mac(s,&(buf[2]),i); + } else - ch_len=SSL2_MAX_CHALLENGE_LENGTH; + { + /* create Client Hello in SSL 3.0/TLS 1.0 format */ - /* write out sslv2 challenge */ - if (SSL3_RANDOM_SIZE < ch_len) - i=SSL3_RANDOM_SIZE; - else - i=ch_len; - s2n(i,d); - memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE); - RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); - memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); - p+=i; + /* do the record header (5 bytes) and handshake message header (4 bytes) last */ + d = p = &(buf[9]); + + *(p++) = version_major; + *(p++) = version_minor; + + /* Random stuff */ + memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); + p += SSL3_RANDOM_SIZE; + + /* Session ID (zero since there is no reuse) */ + *(p++) = 0; + + /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ + i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char); + if (i == 0) + { + SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); + return -1; + } + s2n(i,p); + p+=i; + + /* COMPRESSION */ + if (s->ctx->comp_methods == NULL) + j=0; + else + j=sk_SSL_COMP_num(s->ctx->comp_methods); + *(p++)=1+j; + for (i=0; ictx->comp_methods,i); + *(p++)=comp->id; + } + *(p++)=0; /* Add the NULL method */ + + l = p-d; + *p = 42; - i= p- &(buf[2]); - buf[0]=((i>>8)&0xff)|0x80; - buf[1]=(i&0xff); + /* fill in 4-byte handshake header */ + d=&(buf[5]); + *(d++)=SSL3_MT_CLIENT_HELLO; + l2n3(l,d); + + l += 4; + + if (l > SSL3_RT_MAX_PLAIN_LENGTH) + { + SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); + return -1; + } + + /* fill in 5-byte record header */ + d=buf; + *(d++) = SSL3_RT_HANDSHAKE; + *(d++) = version_major; + *(d++) = version_minor; /* arguably we should send the *lowest* suported version here + * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */ + s2n((int)l,d); + + /* number of bytes to write */ + s->init_num=p-buf; + s->init_off=0; + + ssl3_finish_mac(s,&(buf[5]), s->init_num - 5); + } s->state=SSL23_ST_CW_CLNT_HELLO_B; - /* number of bytes to write */ - s->init_num=i+2; s->init_off=0; - - ssl3_finish_mac(s,&(buf[2]),i); } /* SSL3_ST_CW_CLNT_HELLO_B */ ret = ssl23_write_bytes(s); - if (ret >= 2) - if (s->msg_callback) - s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg); /* CLIENT-HELLO */ + + if ((ret >= 2) && s->msg_callback) + { + /* Client Hello has been sent; tell msg_callback */ + + if (ssl2_compat) + s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg); + else + s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg); + } + return ret; } @@ -363,7 +483,7 @@ static int ssl23_get_server_hello(SSL *s) if (s->s3 != NULL) ssl3_free(s); - if (!BUF_MEM_grow(s->init_buf, + if (!BUF_MEM_grow_clean(s->init_buf, SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); @@ -440,7 +560,7 @@ static int ssl23_get_server_hello(SSL *s) (p[3] == 0) && (p[4] == 2)) { - void (*cb)()=NULL; + void (*cb)(const SSL *ssl,int type,int val)=NULL; int j; /* An alert */