X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fs3_both.c;h=6c5147421ee445ef61382294e36afcc15fe9a0d9;hp=68ddb143da473843cbcbd138fd713c1ba549829c;hb=23a635c0ec895f9876d4d7633e7e2923b5bbfc17;hpb=79aa04ef27f69a1149d4d0e72d2d2953b6241ef0 diff --git a/ssl/s3_both.c b/ssl/s3_both.c index 68ddb143da..6c5147421e 100644 --- a/ssl/s3_both.c +++ b/ssl/s3_both.c @@ -5,21 +5,21 @@ * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. - * + * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * + * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. - * + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -34,10 +34,10 @@ * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from + * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * + * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE @@ -49,21 +49,21 @@ * 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. - * + * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== - * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. + * Copyright (c) 1998-2002 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. + * 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 @@ -108,486 +108,604 @@ * Hudson (tjh@cryptsoft.com). * */ +/* ==================================================================== + * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. + * ECC cipher suite support in OpenSSL originally developed by + * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. + */ +#include #include #include +#include "ssl_locl.h" #include #include #include #include #include -#include "ssl_locl.h" -/* send s->init_buf in records of type 'type' */ +/* + * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or + * SSL3_RT_CHANGE_CIPHER_SPEC) + */ int ssl3_do_write(SSL *s, int type) - { - int ret; - - ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off], - s->init_num); - if (ret < 0) return(-1); - if (type == SSL3_RT_HANDSHAKE) - /* should not be done for 'Hello Request's, but in that case - * we'll ignore the result anyway */ - ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret); - - if (ret == s->init_num) - return(1); - s->init_off+=ret; - s->init_num-=ret; - return(0); - } - -int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen) - { - unsigned char *p,*d; - int i; - unsigned long l; - - if (s->state == a) - { - d=(unsigned char *)s->init_buf->data; - p= &(d[4]); - - i=s->method->ssl3_enc->final_finish_mac(s, - &(s->s3->finish_dgst1), - &(s->s3->finish_dgst2), - sender,slen,s->s3->tmp.finish_md); - s->s3->tmp.finish_md_len = i; - memcpy(p, s->s3->tmp.finish_md, i); - p+=i; - l=i; - -#ifdef OPENSSL_SYS_WIN16 - /* MSVC 1.5 does not clear the top bytes of the word unless - * I do this. - */ - l&=0xffff; +{ + int ret; + + ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off], + s->init_num); + if (ret < 0) + return (-1); + if (type == SSL3_RT_HANDSHAKE) + /* + * should not be done for 'Hello Request's, but in that case we'll + * ignore the result anyway + */ + ssl3_finish_mac(s, (unsigned char *)&s->init_buf->data[s->init_off], + ret); + + if (ret == s->init_num) { + if (s->msg_callback) + s->msg_callback(1, s->version, type, s->init_buf->data, + (size_t)(s->init_off + s->init_num), s, + s->msg_callback_arg); + return (1); + } + s->init_off += ret; + s->init_num -= ret; + return (0); +} + +int tls_construct_finished(SSL *s, const char *sender, int slen) +{ + unsigned char *p; + int i; + unsigned long l; + + p = ssl_handshake_start(s); + + i = s->method->ssl3_enc->final_finish_mac(s, + sender, slen, + s->s3->tmp.finish_md); + if (i <= 0) + return 0; + s->s3->tmp.finish_md_len = i; + memcpy(p, s->s3->tmp.finish_md, i); + l = i; + + /* + * Copy the finished so we can use it for renegotiation checks + */ + if (!s->server) { + OPENSSL_assert(i <= EVP_MAX_MD_SIZE); + memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i); + s->s3->previous_client_finished_len = i; + } else { + OPENSSL_assert(i <= EVP_MAX_MD_SIZE); + memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i); + s->s3->previous_server_finished_len = i; + } + + if (!ssl_set_handshake_header(s, SSL3_MT_FINISHED, l)) { + SSLerr(SSL_F_TLS_CONSTRUCT_FINISHED, ERR_R_INTERNAL_ERROR); + return 0; + } + + return 1; +} + +#ifndef OPENSSL_NO_NEXTPROTONEG +/* + * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen + * to far. + */ +static void ssl3_take_mac(SSL *s) +{ + const char *sender; + int slen; + /* + * If no new cipher setup return immediately: other functions will set + * the appropriate error. + */ + if (s->s3->tmp.new_cipher == NULL) + return; + if (!s->server) { + sender = s->method->ssl3_enc->server_finished_label; + slen = s->method->ssl3_enc->server_finished_label_len; + } else { + sender = s->method->ssl3_enc->client_finished_label; + slen = s->method->ssl3_enc->client_finished_label_len; + } + + s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, + sender, + slen, + s->s3->tmp.peer_finish_md); +} #endif - *(d++)=SSL3_MT_FINISHED; - l2n3(l,d); - s->init_num=(int)l+4; - s->init_off=0; - - s->state=b; - } - - /* SSL3_ST_SEND_xxxxxx_HELLO_B */ - return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); - } - -int ssl3_get_finished(SSL *s, int a, int b) - { - int al,i,ok; - long n; - unsigned char *p; - - /* the mac has already been generated when we received the - * change cipher spec message and is in s->s3->tmp.peer_finish_md - */ - - n=ssl3_get_message(s, - a, - b, - SSL3_MT_FINISHED, - 64, /* should actually be 36+4 :-) */ - &ok); - - if (!ok) return((int)n); - - /* If this occurs, we have missed a message */ - if (!s->s3->change_cipher_spec) - { - al=SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS); - goto f_err; - } - s->s3->change_cipher_spec=0; - - p = (unsigned char *)s->init_buf->data; - i = s->s3->tmp.peer_finish_md_len; - - if (i != n) - { - al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH); - goto f_err; - } - - if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) - { - al=SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED); - goto f_err; - } - - return(1); -f_err: - ssl3_send_alert(s,SSL3_AL_FATAL,al); - return(0); - } - -/* for these 2 messages, we need to - * ssl->enc_read_ctx re-init - * ssl->s3->read_sequence zero - * ssl->s3->read_mac_secret re-init - * ssl->session->read_sym_enc assign - * ssl->session->read_compression assign - * ssl->session->read_hash assign - */ -int ssl3_send_change_cipher_spec(SSL *s, int a, int b) - { - unsigned char *p; - - if (s->state == a) - { - p=(unsigned char *)s->init_buf->data; - *p=SSL3_MT_CCS; - s->init_num=1; - s->init_off=0; - - s->state=b; - } - - /* SSL3_ST_CW_CHANGE_B */ - return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC)); - } - -unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) - { - unsigned char *p; - int n,i; - unsigned long l=7; - BUF_MEM *buf; - X509_STORE_CTX xs_ctx; - X509_OBJECT obj; - - /* TLSv1 sends a chain with nothing in it, instead of an alert */ - buf=s->init_buf; - if (!BUF_MEM_grow(buf,(int)(10))) - { - SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); - return(0); - } - if (x != NULL) - { - if(!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL)) - { - SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB); - return(0); - } - - for (;;) - { - n=i2d_X509(x,NULL); - if (!BUF_MEM_grow(buf,(int)(n+l+3))) - { - SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); - return(0); - } - p=(unsigned char *)&(buf->data[l]); - l2n3(n,p); - i2d_X509(x,&p); - l+=n+3; - if (X509_NAME_cmp(X509_get_subject_name(x), - X509_get_issuer_name(x)) == 0) break; - - i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509, - X509_get_issuer_name(x),&obj); - if (i <= 0) break; - x=obj.data.x509; - /* Count is one too high since the X509_STORE_get uped the - * ref count */ - X509_free(x); - } - - X509_STORE_CTX_cleanup(&xs_ctx); - } - - /* Thawte special :-) */ - if (s->ctx->extra_certs != NULL) - for (i=0; ictx->extra_certs); i++) - { - x=sk_X509_value(s->ctx->extra_certs,i); - n=i2d_X509(x,NULL); - if (!BUF_MEM_grow(buf,(int)(n+l+3))) - { - SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); - return(0); - } - p=(unsigned char *)&(buf->data[l]); - l2n3(n,p); - i2d_X509(x,&p); - l+=n+3; - } - - l-=7; - p=(unsigned char *)&(buf->data[4]); - l2n3(l,p); - l+=3; - p=(unsigned char *)&(buf->data[0]); - *(p++)=SSL3_MT_CERTIFICATE; - l2n3(l,p); - l+=4; - return(l); - } - -/* Obtain handshake message of message type 'mt' (any if mt == -1), - * maximum acceptable body length 'max'. - * The first four bytes (msg_type and length) are read in state 'st1', - * the body is read in state 'stn'. - */ -long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) - { - unsigned char *p; - unsigned long l; - long n; - int i,al; - - if (s->s3->tmp.reuse_message) - { - s->s3->tmp.reuse_message=0; - if ((mt >= 0) && (s->s3->tmp.message_type != mt)) - { - al=SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); - goto f_err; - } - *ok=1; - return((int)s->s3->tmp.message_size); - } - - p=(unsigned char *)s->init_buf->data; - - if (s->state == st1) /* s->init_num < 4 */ - { - int skip_message; - - do - { - while (s->init_num < 4) - { - i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num], - 4 - s->init_num, 0); - if (i <= 0) - { - s->rwstate=SSL_READING; - *ok = 0; - return i; - } - s->init_num+=i; - } - - skip_message = 0; - if (!s->server) - if (p[0] == SSL3_MT_HELLO_REQUEST) - /* The server may always send 'Hello Request' messages -- - * we are doing a handshake anyway now, so ignore them - * if their format is correct. Does not count for - * 'Finished' MAC. */ - if (p[1] == 0 && p[2] == 0 &&p[3] == 0) - skip_message = 1; - } - while (skip_message); - - /* s->init_num == 4 */ - - if ((mt >= 0) && (*p != mt)) - { - al=SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); - goto f_err; - } - if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && - (st1 == SSL3_ST_SR_CERT_A) && - (stn == SSL3_ST_SR_CERT_B)) - { - /* At this point we have got an MS SGC second client - * hello (maybe we should always allow the client to - * start a new handshake?). We need to restart the mac. - * Don't increment {num,total}_renegotiations because - * we have not completed the handshake. */ - ssl3_init_finished_mac(s); - } - - ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, 4); - - s->s3->tmp.message_type= *(p++); - - n2l3(p,l); - if (l > (unsigned long)max) - { - al=SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); - goto f_err; - } - if (l && !BUF_MEM_grow(s->init_buf,(int)l)) - { - SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB); - goto err; - } - s->s3->tmp.message_size=l; - s->state=stn; - - s->init_num=0; - } - - /* next state (stn) */ - p=(unsigned char *)s->init_buf->data; - n=s->s3->tmp.message_size; - while (n > 0) - { - i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0); - if (i <= 0) - { - s->rwstate=SSL_READING; - *ok = 0; - return i; - } - s->init_num += i; - n -= i; - } - ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num); - *ok=1; - return s->init_num; -f_err: - ssl3_send_alert(s,SSL3_AL_FATAL,al); -err: - *ok=0; - return(-1); - } +enum MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, long n) +{ + int al; + + /* + * 'Change Cipher Spec' is just a single byte, which should already have + * been consumed by ssl_get_message() so there should be no bytes left, + * unless we're using DTLS1_BAD_VER, which has an extra 2 bytes + */ + if (SSL_IS_DTLS(s)) { + if ((s->version == DTLS1_BAD_VER && n != DTLS1_CCS_HEADER_LENGTH + 1) + || (s->version != DTLS1_BAD_VER + && n != DTLS1_CCS_HEADER_LENGTH - 1)) { + al = SSL_AD_ILLEGAL_PARAMETER; + SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, + SSL_R_BAD_CHANGE_CIPHER_SPEC); + goto f_err; + } + } else { + if (n != 0) { + al = SSL_AD_ILLEGAL_PARAMETER; + SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, + SSL_R_BAD_CHANGE_CIPHER_SPEC); + goto f_err; + } + } + + /* Check we have a cipher to change to */ + if (s->s3->tmp.new_cipher == NULL) { + al = SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, SSL_R_CCS_RECEIVED_EARLY); + goto f_err; + } + + s->s3->change_cipher_spec = 1; + if (!ssl3_do_change_cipher_spec(s)) { + al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR); + goto f_err; + } + + if (SSL_IS_DTLS(s)) { + dtls1_reset_seq_numbers(s, SSL3_CC_READ); + + if (s->version == DTLS1_BAD_VER) + s->d1->handshake_read_seq++; + +#ifndef OPENSSL_NO_SCTP + /* + * Remember that a CCS has been received, so that an old key of + * SCTP-Auth can be deleted when a CCS is sent. Will be ignored if no + * SCTP is used + */ + BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD, 1, NULL); +#endif + } + + return MSG_PROCESS_CONTINUE_READING; + f_err: + ssl3_send_alert(s, SSL3_AL_FATAL, al); + statem_set_error(s); + return MSG_PROCESS_ERROR; +} + +enum MSG_PROCESS_RETURN tls_process_finished(SSL *s, unsigned long n) +{ + int al, i; + unsigned char *p; + + /* If this occurs, we have missed a message */ + if (!s->s3->change_cipher_spec) { + al = SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS); + goto f_err; + } + s->s3->change_cipher_spec = 0; + + p = (unsigned char *)s->init_msg; + i = s->s3->tmp.peer_finish_md_len; + + if (i < 0 || (unsigned long)i != n) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_BAD_DIGEST_LENGTH); + goto f_err; + } + + if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) { + al = SSL_AD_DECRYPT_ERROR; + SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_DIGEST_CHECK_FAILED); + goto f_err; + } + + /* + * Copy the finished so we can use it for renegotiation checks + */ + if (s->server) { + OPENSSL_assert(i <= EVP_MAX_MD_SIZE); + memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i); + s->s3->previous_client_finished_len = i; + } else { + OPENSSL_assert(i <= EVP_MAX_MD_SIZE); + memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i); + s->s3->previous_server_finished_len = i; + } + + return MSG_PROCESS_CONTINUE_PROCESSING; + f_err: + ssl3_send_alert(s, SSL3_AL_FATAL, al); + statem_set_error(s); + return MSG_PROCESS_ERROR; +} + +int tls_construct_change_cipher_spec(SSL *s) +{ + unsigned char *p; + + p = (unsigned char *)s->init_buf->data; + *p = SSL3_MT_CCS; + s->init_num = 1; + s->init_off = 0; + + return 1; +} + +unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk) +{ + unsigned char *p; + unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s); + + if (!ssl_add_cert_chain(s, cpk, &l)) + return 0; + + l -= 3 + SSL_HM_HEADER_LENGTH(s); + p = ssl_handshake_start(s); + l2n3(l, p); + l += 3; + + if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l)) { + SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR); + return 0; + } + return l + SSL_HM_HEADER_LENGTH(s); +} + +enum WORK_STATE tls_finish_handshake(SSL *s, enum WORK_STATE wst) +{ + void (*cb) (const SSL *ssl, int type, int val) = NULL; + +#ifndef OPENSSL_NO_SCTP + if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))) { + enum WORK_STATE ret; + ret = dtls_wait_for_dry(s); + if (ret != WORK_FINISHED_CONTINUE) + return ret; + } +#endif + + /* clean a few things up */ + ssl3_cleanup_key_block(s); + + if (!SSL_IS_DTLS(s)) { + /* + * We don't do this in DTLS because we may still need the init_buf + * in case there are any unexpected retransmits + */ + BUF_MEM_free(s->init_buf); + s->init_buf = NULL; + } + + ssl_free_wbio_buffer(s); + + s->init_num = 0; + + if (!s->server || s->renegotiate == 2) { + /* skipped if we just sent a HelloRequest */ + s->renegotiate = 0; + s->new_session = 0; + + if (s->server) { + s->renegotiate = 0; + s->new_session = 0; + + ssl_update_cache(s, SSL_SESS_CACHE_SERVER); + + s->ctx->stats.sess_accept_good++; + s->handshake_func = ssl3_accept; + } else { + ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); + if (s->hit) + s->ctx->stats.sess_hit++; + + s->handshake_func = ssl3_connect; + s->ctx->stats.sess_connect_good++; + } + + if (s->info_callback != NULL) + cb = s->info_callback; + else if (s->ctx->info_callback != NULL) + cb = s->ctx->info_callback; + + if (cb != NULL) + cb(s, SSL_CB_HANDSHAKE_DONE, 1); + + if (SSL_IS_DTLS(s)) { + /* done with handshaking */ + s->d1->handshake_read_seq = 0; + s->d1->handshake_write_seq = 0; + s->d1->next_handshake_write_seq = 0; + } + } + + return WORK_FINISHED_STOP; +} + +int tls_get_message_header(SSL *s, int *mt) +{ + /* s->init_num < SSL3_HM_HEADER_LENGTH */ + int skip_message, i, recvd_type, al; + unsigned char *p; + unsigned long l; + + p = (unsigned char *)s->init_buf->data; + + do { + while (s->init_num < SSL3_HM_HEADER_LENGTH) { + i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &recvd_type, + &p[s->init_num], SSL3_HM_HEADER_LENGTH - s->init_num, 0); + if (i <= 0) { + s->rwstate = SSL_READING; + return 0; + } + if (recvd_type == SSL3_RT_CHANGE_CIPHER_SPEC) { + s->s3->tmp.message_type = *mt = SSL3_MT_CHANGE_CIPHER_SPEC; + s->init_num = i - 1; + s->s3->tmp.message_size = i; + return 1; + } else if (recvd_type != SSL3_RT_HANDSHAKE) { + al = SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_CCS_RECEIVED_EARLY); + goto f_err; + } + s->init_num += i; + } + + skip_message = 0; + if (!s->server) + if (p[0] == SSL3_MT_HELLO_REQUEST) + /* + * The server may always send 'Hello Request' messages -- + * we are doing a handshake anyway now, so ignore them if + * their format is correct. Does not count for 'Finished' + * MAC. + */ + if (p[1] == 0 && p[2] == 0 && p[3] == 0) { + s->init_num = 0; + skip_message = 1; + + if (s->msg_callback) + s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, + p, SSL3_HM_HEADER_LENGTH, s, + s->msg_callback_arg); + } + } while (skip_message); + /* s->init_num == SSL3_HM_HEADER_LENGTH */ + + *mt = *p; + s->s3->tmp.message_type = *(p++); + + if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) { + /* + * Only happens with SSLv3+ in an SSLv2 backward compatible + * ClientHello + */ + /* + * Total message size is the remaining record bytes to read + * plus the SSL3_HM_HEADER_LENGTH bytes that we already read + */ + l = RECORD_LAYER_get_rrec_length(&s->rlayer) + + SSL3_HM_HEADER_LENGTH; + if (l && !BUF_MEM_grow_clean(s->init_buf, (int)l)) { + SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB); + goto err; + } + s->s3->tmp.message_size = l; + + s->init_msg = s->init_buf->data; + s->init_num = SSL3_HM_HEADER_LENGTH; + } else { + n2l3(p, l); + /* BUF_MEM_grow takes an 'int' parameter */ + if (l > (INT_MAX - SSL3_HM_HEADER_LENGTH)) { + al = SSL_AD_ILLEGAL_PARAMETER; + SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_EXCESSIVE_MESSAGE_SIZE); + goto f_err; + } + if (l && !BUF_MEM_grow_clean(s->init_buf, + (int)l + SSL3_HM_HEADER_LENGTH)) { + SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB); + goto err; + } + s->s3->tmp.message_size = l; + + s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH; + s->init_num = 0; + } + + return 1; + f_err: + ssl3_send_alert(s, SSL3_AL_FATAL, al); + err: + return 0; +} + +int tls_get_message_body(SSL *s, unsigned long *len) +{ + long n; + unsigned char *p; + int i; + + if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC) { + /* We've already read everything in */ + *len = (unsigned long)s->init_num; + return 1; + } + + p = s->init_msg; + n = s->s3->tmp.message_size - s->init_num; + while (n > 0) { + i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL, + &p[s->init_num], n, 0); + if (i <= 0) { + s->rwstate = SSL_READING; + *len = 0; + return 0; + } + s->init_num += i; + n -= i; + } + +#ifndef OPENSSL_NO_NEXTPROTONEG + /* + * If receiving Finished, record MAC of prior handshake messages for + * Finished verification. + */ + if (*s->init_buf->data == SSL3_MT_FINISHED) + ssl3_take_mac(s); +#endif + + /* Feed this message into MAC computation. */ + if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) { + ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num); + if (s->msg_callback) + s->msg_callback(0, SSL2_VERSION, 0, s->init_buf->data, + (size_t)s->init_num, s, s->msg_callback_arg); + } else { + ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, + s->init_num + SSL3_HM_HEADER_LENGTH); + if (s->msg_callback) + s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, + (size_t)s->init_num + SSL3_HM_HEADER_LENGTH, s, + s->msg_callback_arg); + } + + /* + * init_num should never be negative...should probably be declared + * unsigned + */ + if (s->init_num < 0) { + SSLerr(SSL_F_TLS_GET_MESSAGE_BODY, ERR_R_INTERNAL_ERROR); + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + *len = 0; + return 0; + } + *len = (unsigned long)s->init_num; + return 1; +} int ssl_cert_type(X509 *x, EVP_PKEY *pkey) - { - EVP_PKEY *pk; - int ret= -1,i,j; - - if (pkey == NULL) - pk=X509_get_pubkey(x); - else - pk=pkey; - if (pk == NULL) goto err; - - i=pk->type; - if (i == EVP_PKEY_RSA) - { - ret=SSL_PKEY_RSA_ENC; - if (x != NULL) - { - j=X509_get_ext_count(x); - /* check to see if this is a signing only certificate */ - /* EAY EAY EAY EAY */ - } - } - else if (i == EVP_PKEY_DSA) - { - ret=SSL_PKEY_DSA_SIGN; - } - else if (i == EVP_PKEY_DH) - { - /* if we just have a key, we needs to be guess */ - - if (x == NULL) - ret=SSL_PKEY_DH_DSA; - else - { - j=X509_get_signature_type(x); - if (j == EVP_PKEY_RSA) - ret=SSL_PKEY_DH_RSA; - else if (j== EVP_PKEY_DSA) - ret=SSL_PKEY_DH_DSA; - else ret= -1; - } - } - else - ret= -1; - -err: - if(!pkey) EVP_PKEY_free(pk); - return(ret); - } +{ + EVP_PKEY *pk; + int ret = -1, i; + + if (pkey == NULL) + pk = X509_get_pubkey(x); + else + pk = pkey; + if (pk == NULL) + goto err; + + i = pk->type; + if (i == EVP_PKEY_RSA) { + ret = SSL_PKEY_RSA_ENC; + } else if (i == EVP_PKEY_DSA) { + ret = SSL_PKEY_DSA_SIGN; + } +#ifndef OPENSSL_NO_EC + else if (i == EVP_PKEY_EC) { + ret = SSL_PKEY_ECC; + } +#endif + else if (i == NID_id_GostR3410_2001) { + ret = SSL_PKEY_GOST01; + } else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX)) { + /* + * For DH two cases: DH certificate signed with RSA and DH + * certificate signed with DSA. + */ + i = X509_certificate_type(x, pk); + if (i & EVP_PKS_RSA) + ret = SSL_PKEY_DH_RSA; + else if (i & EVP_PKS_DSA) + ret = SSL_PKEY_DH_DSA; + } + + err: + if (!pkey) + EVP_PKEY_free(pk); + return (ret); +} int ssl_verify_alarm_type(long type) - { - int al; - - switch(type) - { - case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: - case X509_V_ERR_UNABLE_TO_GET_CRL: - case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: - al=SSL_AD_UNKNOWN_CA; - break; - case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: - case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: - case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: - case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: - case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: - case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: - case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: - case X509_V_ERR_CERT_NOT_YET_VALID: - case X509_V_ERR_CRL_NOT_YET_VALID: - al=SSL_AD_BAD_CERTIFICATE; - break; - case X509_V_ERR_CERT_SIGNATURE_FAILURE: - case X509_V_ERR_CRL_SIGNATURE_FAILURE: - al=SSL_AD_DECRYPT_ERROR; - break; - case X509_V_ERR_CERT_HAS_EXPIRED: - case X509_V_ERR_CRL_HAS_EXPIRED: - al=SSL_AD_CERTIFICATE_EXPIRED; - break; - case X509_V_ERR_CERT_REVOKED: - al=SSL_AD_CERTIFICATE_REVOKED; - break; - case X509_V_ERR_OUT_OF_MEM: - al=SSL_AD_INTERNAL_ERROR; - break; - case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: - case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: - case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: - case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: - case X509_V_ERR_CERT_CHAIN_TOO_LONG: - al=SSL_AD_UNKNOWN_CA; - break; - case X509_V_ERR_APPLICATION_VERIFICATION: - al=SSL_AD_HANDSHAKE_FAILURE; - break; - default: - al=SSL_AD_CERTIFICATE_UNKNOWN; - break; - } - return(al); - } - -int ssl3_setup_buffers(SSL *s) - { - unsigned char *p; - unsigned int extra; - - if (s->s3->rbuf.buf == NULL) - { - if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) - extra=SSL3_RT_MAX_EXTRA; - else - extra=0; - if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE+extra)) - == NULL) - goto err; - s->s3->rbuf.buf=p; - } - - if (s->s3->wbuf.buf == NULL) - { - if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE)) - == NULL) - goto err; - s->s3->wbuf.buf=p; - } - s->packet= &(s->s3->rbuf.buf[0]); - return(1); -err: - SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE); - return(0); - } +{ + int al; + + switch (type) { + case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: + case X509_V_ERR_UNABLE_TO_GET_CRL: + case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: + al = SSL_AD_UNKNOWN_CA; + break; + case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: + case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: + case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: + case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: + case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: + case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: + case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: + case X509_V_ERR_CERT_NOT_YET_VALID: + case X509_V_ERR_CRL_NOT_YET_VALID: + case X509_V_ERR_CERT_UNTRUSTED: + case X509_V_ERR_CERT_REJECTED: + al = SSL_AD_BAD_CERTIFICATE; + break; + case X509_V_ERR_CERT_SIGNATURE_FAILURE: + case X509_V_ERR_CRL_SIGNATURE_FAILURE: + al = SSL_AD_DECRYPT_ERROR; + break; + case X509_V_ERR_CERT_HAS_EXPIRED: + case X509_V_ERR_CRL_HAS_EXPIRED: + al = SSL_AD_CERTIFICATE_EXPIRED; + break; + case X509_V_ERR_CERT_REVOKED: + al = SSL_AD_CERTIFICATE_REVOKED; + break; + case X509_V_ERR_OUT_OF_MEM: + al = SSL_AD_INTERNAL_ERROR; + break; + case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: + case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: + case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: + case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: + case X509_V_ERR_CERT_CHAIN_TOO_LONG: + case X509_V_ERR_PATH_LENGTH_EXCEEDED: + case X509_V_ERR_INVALID_CA: + al = SSL_AD_UNKNOWN_CA; + break; + case X509_V_ERR_APPLICATION_VERIFICATION: + al = SSL_AD_HANDSHAKE_FAILURE; + break; + case X509_V_ERR_INVALID_PURPOSE: + al = SSL_AD_UNSUPPORTED_CERTIFICATE; + break; + default: + al = SSL_AD_CERTIFICATE_UNKNOWN; + break; + } + return (al); +} + +int ssl_allow_compression(SSL *s) +{ + if (s->options & SSL_OP_NO_COMPRESSION) + return 0; + return ssl_security(s, SSL_SECOP_COMPRESSION, 0, 0, NULL); +}