static int ssl_print_signature(BIO *bio, int indent, SSL *s, const unsigned char **pmsg, size_t *pmsglen) { if (*pmsglen < 2) return 0; if (TLS1_get_version(s) >= TLS1_2_VERSION) { const unsigned char *p = *pmsg; BIO_indent(bio, indent, 80); BIO_printf(bio, "Signature Algorithm %s+%s (%d+%d)\n", ssl_trace_str(p[0], ssl_md_tbl), ssl_trace_str(p[1], ssl_sig_tbl), p[0], p[1]); *pmsg += 2; *pmsglen -= 2; } return ssl_print_hexbuf(bio, indent, "Signature", 2, pmsg, pmsglen); }
static int ssl23_client_hello(SSL *s) { unsigned char *buf; unsigned char *p,*d; int i,ch_len; unsigned long Time,l; int ssl2_compat; int version = 0, version_major, version_minor; #ifndef OPENSSL_NO_COMP int j; SSL_COMP *comp; #endif int ret; unsigned long mask, options = s->options; ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1; if (ssl2_compat && ssl23_no_ssl2_ciphers(s)) ssl2_compat = 0; /* * SSL_OP_NO_X disables all protocols above X *if* there are * some protocols below X enabled. This is required in order * to maintain "version capability" vector contiguous. So * that if application wants to disable TLS1.0 in favour of * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. */ mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1 #if !defined(OPENSSL_NO_SSL3) |SSL_OP_NO_SSLv3 #endif #if !defined(OPENSSL_NO_SSL2) |(ssl2_compat?SSL_OP_NO_SSLv2:0) #endif ; #if !defined(OPENSSL_NO_TLS1_2_CLIENT) version = TLS1_2_VERSION; if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) version = TLS1_1_VERSION; #else version = TLS1_1_VERSION; #endif mask &= ~SSL_OP_NO_TLSv1_1; if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) version = TLS1_VERSION; mask &= ~SSL_OP_NO_TLSv1; #if !defined(OPENSSL_NO_SSL3) if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) version = SSL3_VERSION; mask &= ~SSL_OP_NO_SSLv3; #endif #if !defined(OPENSSL_NO_SSL2) if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask) version = SSL2_VERSION; #endif #ifndef OPENSSL_NO_TLSEXT if (version != SSL2_VERSION) { /* have to disable SSL 2.0 compatibility if we need TLS extensions */ if (s->tlsext_hostname != NULL) ssl2_compat = 0; if (s->tlsext_status_type != -1) ssl2_compat = 0; #ifdef TLSEXT_TYPE_opaque_prf_input if (s->ctx->tlsext_opaque_prf_input_callback != 0 || s->tlsext_opaque_prf_input != NULL) ssl2_compat = 0; #endif } #endif buf=(unsigned char *)s->init_buf->data; if (s->state == SSL23_ST_CW_CLNT_HELLO_A) { #if 0 /* don't reuse session-id's */ if (!ssl_get_new_session(s,0)) { return(-1); } #endif p=s->s3->client_random; Time=(unsigned long)time(NULL); /* Time */ l2n(Time,p); if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) return -1; if (version == TLS1_2_VERSION) { version_major = TLS1_2_VERSION_MAJOR; version_minor = TLS1_2_VERSION_MINOR; } else if (version == TLS1_1_VERSION) { version_major = TLS1_1_VERSION_MAJOR; version_minor = TLS1_1_VERSION_MINOR; } else if (version == TLS1_VERSION) { version_major = TLS1_VERSION_MAJOR; version_minor = TLS1_VERSION_MINOR; } #ifdef OPENSSL_FIPS else if(FIPS_mode()) { SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); return -1; } #endif else if (version == SSL3_VERSION) { version_major = SSL3_VERSION_MAJOR; version_minor = SSL3_VERSION_MINOR; } else if (version == SSL2_VERSION) { version_major = SSL2_VERSION_MAJOR; version_minor = SSL2_VERSION_MINOR; } else { SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE); return(-1); } s->client_version = version; if (ssl2_compat) { /* create SSL 2.0 compatible Client Hello */ /* 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; #endif 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 */ /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for futurproofing */ 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 { /* create Client Hello in SSL 3.0/TLS 1.0 format */ /* do the record header (5 bytes) and handshake message * header (4 bytes) last. Note: the final argument to * ssl_add_clienthello_tlsext below depends on the size * of this prefix. */ 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; } #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH /* Some servers hang if client hello > 256 bytes * as hack workaround chop number of supported ciphers * to keep it well below this if we use TLS v1.2 */ if (TLS1_get_version(s) >= TLS1_2_VERSION && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; #endif s2n(i,p); p+=i; /* COMPRESSION */ #ifdef OPENSSL_NO_COMP *(p++)=1; #else if ((s->options & SSL_OP_NO_COMPRESSION) || !s->ctx->comp_methods) j=0; else j=sk_SSL_COMP_num(s->ctx->comp_methods); *(p++)=1+j; for (i=0; i<j; i++) { comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); *(p++)=comp->id; } #endif *(p++)=0; /* Add the NULL method */ #ifndef OPENSSL_NO_TLSEXT /* TLS extensions*/ if (ssl_prepare_clienthello_tlsext(s) <= 0) { SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); return -1; } /* The buffer includes the 5 byte record header, so * subtract it to compute hlen for * ssl_add_clienthello_tlsext. */ if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, p-buf-5)) == NULL) { SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); return -1; } #endif l = p-d; /* 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; /* Some servers hang if we use long client hellos * and a record number > TLS 1.0. */ if (TLS1_get_client_version(s) > TLS1_VERSION) *(d++) = 1; else *(d++) = version_minor; 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; s->init_off=0; }
static int ssl23_client_hello(SSL *s) { unsigned char *buf; unsigned char *p, *d; int i; unsigned long l; int version = 0, version_major, version_minor; int ret; unsigned long mask, options = s->options; /* * SSL_OP_NO_X disables all protocols above X *if* there are * some protocols below X enabled. This is required in order * to maintain "version capability" vector contiguous. So * that if application wants to disable TLS1.0 in favour of * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. */ mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3; version = TLS1_2_VERSION; if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) version = TLS1_1_VERSION; mask &= ~SSL_OP_NO_TLSv1_1; if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) version = TLS1_VERSION; mask &= ~SSL_OP_NO_TLSv1; if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) version = SSL3_VERSION; mask &= ~SSL_OP_NO_SSLv3; buf = (unsigned char *)s->init_buf->data; if (s->state == SSL23_ST_CW_CLNT_HELLO_A) { p = s->s3->client_random; RAND_pseudo_bytes(p, SSL3_RANDOM_SIZE); if (version == TLS1_2_VERSION) { version_major = TLS1_2_VERSION_MAJOR; version_minor = TLS1_2_VERSION_MINOR; } else if (version == TLS1_1_VERSION) { version_major = TLS1_1_VERSION_MAJOR; version_minor = TLS1_1_VERSION_MINOR; } else if (version == TLS1_VERSION) { version_major = TLS1_VERSION_MAJOR; version_minor = TLS1_VERSION_MINOR; } else if (version == SSL3_VERSION) { version_major = SSL3_VERSION_MAJOR; version_minor = SSL3_VERSION_MINOR; } else { SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_PROTOCOLS_AVAILABLE); return (-1); } s->client_version = version; /* create Client Hello in SSL 3.0/TLS 1.0 format */ /* * 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; } #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH /* * Some servers hang if client hello > 256 bytes * as hack workaround chop number of supported ciphers * to keep it well below this if we use TLS v1.2 */ if (TLS1_get_version(s) >= TLS1_2_VERSION && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; #endif s2n(i, p); p += i; /* add in (no) COMPRESSION */ *(p++) = 1; /* Add the NULL method */ *(p++) = 0; /* TLS extensions*/ if (ssl_prepare_clienthello_tlsext(s) <= 0) { SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); return -1; } if ((p = ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) { SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); return -1; } l = p - d; /* 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; /* * Some servers hang if we use long client hellos * and a record number > TLS 1.0. */ if (TLS1_get_client_version(s) > TLS1_VERSION) *(d++) = 1; else *(d++) = version_minor; 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; s->init_off = 0; } /* SSL3_ST_CW_CLNT_HELLO_B */ ret = ssl23_write_bytes(s); if ((ret >= 2) && s->msg_callback) { /* Client Hello has been sent; tell msg_callback */ s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data + 5, ret - 5, s, s->msg_callback_arg); } return ret; }