X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fs3_pkt.c;h=b9e45c74bc5c8c04cc7c2e023eb484162491e362;hp=e58940990639c7b198dd0cf1a7b85857ea951582;hb=701134320a94908d8c0ac513741cab41e215a7b5;hpb=64a786a292e301bfbcb269cd2bff0533503d5b8b diff --git a/ssl/s3_pkt.c b/ssl/s3_pkt.c index e589409906..b9e45c74bc 100644 --- a/ssl/s3_pkt.c +++ b/ssl/s3_pkt.c @@ -117,6 +117,20 @@ #include #include +#ifndef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK +# define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 +#endif + +#if defined(OPENSSL_SMALL_FOOTPRINT) || \ + !( defined(AES_ASM) && ( \ + defined(__x86_64) || defined(__x86_64__) || \ + defined(_M_AMD64) || defined(_M_X64) || \ + defined(__INTEL__) ) \ + ) +# undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK +# define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 +#endif + static int do_ssl3_write(SSL *s, int type, const unsigned char *buf, unsigned int len, int create_empty_fragment); static int ssl3_get_record(SSL *s); @@ -344,7 +358,7 @@ fprintf(stderr, "Record type=%d, Length=%d\n", rr->type, rr->length); if (version != s->version) { SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER); - if ((s->version & 0xFF00) == (version & 0xFF00)) + if ((s->version & 0xFF00) == (version & 0xFF00) && !s->enc_write_ctx && !s->write_hash) /* Send back error using their minor version number :-) */ s->version = (unsigned short)version; al=SSL_AD_PROTOCOL_VERSION; @@ -408,6 +422,30 @@ fprintf(stderr, "Record type=%d, Length=%d\n", rr->type, rr->length); /* decrypt in place in 'rr->input' */ rr->data=rr->input; rr->orig_len=rr->length; + /* If in encrypt-then-mac mode calculate mac from encrypted record. + * All the details below are public so no timing details can leak. + */ + if (SSL_USE_ETM(s) && s->read_hash) + { + unsigned char *mac; + mac_size=EVP_MD_CTX_size(s->read_hash); + OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE); + if (rr->length < mac_size) + { + al=SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_LENGTH_TOO_SHORT); + goto f_err; + } + rr->length -= mac_size; + mac = rr->data + rr->length; + i=s->method->ssl3_enc->mac(s,md,0 /* not send */); + if (i < 0 || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0) + { + al=SSL_AD_BAD_RECORD_MAC; + SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); + goto f_err; + } + } enc_err = s->method->ssl3_enc->enc(s,0); /* enc_err is: @@ -430,7 +468,7 @@ printf("\n"); /* r->length is now the compressed data plus mac */ if ((sess != NULL) && (s->enc_read_ctx != NULL) && - (EVP_MD_CTX_md(s->read_hash) != NULL)) + (EVP_MD_CTX_md(s->read_hash) != NULL) && !SSL_USE_ETM(s)) { /* s->read_hash != NULL => mac_size != -1 */ unsigned char *mac = NULL; @@ -485,7 +523,7 @@ printf("\n"); /* A separate 'decryption_failed' alert was introduced with TLS 1.0, * SSL 3.0 only has 'bad_record_mac'. But unless a decryption * failure is directly visible from the ciphertext anyway, - * we should not reveal which kind of error occured -- this + * we should not reveal which kind of error occurred -- this * might become visible to an attacker (e.g. via a logfile) */ al=SSL_AD_BAD_RECORD_MAC; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); @@ -597,7 +635,12 @@ int ssl3_do_compress(SSL *ssl) int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) { const unsigned char *buf=buf_; - unsigned int tot,n,nw; + int tot; + unsigned int n,nw; +#if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK + unsigned int max_send_fragment; +#endif + SSL3_BUFFER *wb=&(s->s3->wbuf); int i; s->rwstate=SSL_NOTHING; @@ -615,6 +658,164 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) } } + /* first check if there is a SSL3_BUFFER still being written + * out. This will happen with non blocking IO */ + if (wb->left != 0) + { + i = ssl3_write_pending(s,type,&buf[tot],s->s3->wpend_tot); + if (i<=0) + { + /* XXX should we ssl3_release_write_buffer if i<0? */ + s->s3->wnum=tot; + return i; + } + tot += i; /* this might be last fragment */ + } + +#if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK + /* + * Depending on platform multi-block can deliver several *times* + * better performance. Downside is that it has to allocate + * jumbo buffer to accomodate up to 8 records, but the + * compromise is considered worthy. + */ + if (type==SSL3_RT_APPLICATION_DATA && + len >= 4*(max_send_fragment=s->max_send_fragment) && + s->compress==NULL && s->msg_callback==NULL && + !SSL_USE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && + EVP_CIPHER_flags(s->enc_write_ctx->cipher)&EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) + { + unsigned char aad[13]; + EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; + int packlen; + + /* minimize address aliasing conflicts */ + if ((max_send_fragment&0xffff) == 0) + max_send_fragment -= 512; + + if (tot==0 || wb->buf==NULL) /* allocate jumbo buffer */ + { + ssl3_release_write_buffer(s); + + packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, + EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, + max_send_fragment,NULL); + + if (len>=8*max_send_fragment) packlen *= 8; + else packlen *= 4; + + wb->buf=OPENSSL_malloc(packlen); + wb->len=packlen; + } + else if (tot==len) /* done? */ + { + OPENSSL_free(wb->buf); /* free jumbo buffer */ + wb->buf = NULL; + return tot; + } + + n=(len-tot); + for (;;) + { + if (n < 4*max_send_fragment) + { + OPENSSL_free(wb->buf); /* free jumbo buffer */ + wb->buf = NULL; + break; + } + + if (s->s3->alert_dispatch) + { + i=s->method->ssl_dispatch_alert(s); + if (i <= 0) + { + s->s3->wnum=tot; + return i; + } + } + + if (n >= 8*max_send_fragment) + nw = max_send_fragment*(mb_param.interleave=8); + else + nw = max_send_fragment*(mb_param.interleave=4); + + memcpy(aad,s->s3->write_sequence,8); + aad[8]=type; + aad[9]=(unsigned char)(s->version>>8); + aad[10]=(unsigned char)(s->version); + aad[11]=0; + aad[12]=0; + mb_param.out = NULL; + mb_param.inp = aad; + mb_param.len = nw; + + packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, + EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, + sizeof(mb_param),&mb_param); + + if (packlen<=0 || packlen>wb->len) /* never happens */ + { + OPENSSL_free(wb->buf); /* free jumbo buffer */ + wb->buf = NULL; + break; + } + + mb_param.out = wb->buf; + mb_param.inp = &buf[tot]; + mb_param.len = nw; + + if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, + EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, + sizeof(mb_param),&mb_param)<=0) + return -1; + + s->s3->write_sequence[7] += mb_param.interleave; + if (s->s3->write_sequence[7] < mb_param.interleave) + { + int j=6; + while (j>=0 && (++s->s3->write_sequence[j--])==0) ; + } + + wb->offset = 0; + wb->left = packlen; + + s->s3->wpend_tot = nw; + s->s3->wpend_buf = &buf[tot]; + s->s3->wpend_type= type; + s->s3->wpend_ret = nw; + + i = ssl3_write_pending(s,type,&buf[tot],nw); + if (i<=0) + { + if (i<0) + { + OPENSSL_free(wb->buf); + wb->buf = NULL; + } + s->s3->wnum=tot; + return i; + } + if (i==(int)n) + { + OPENSSL_free(wb->buf); /* free jumbo buffer */ + wb->buf = NULL; + return tot+i; + } + n-=i; + tot+=i; + } + } + else +#endif + if (tot==len) /* done? */ + { + if (s->mode & SSL_MODE_RELEASE_BUFFERS && + !SSL_IS_DTLS(s)) + ssl3_release_write_buffer(s); + + return tot; + } + n=(len-tot); for (;;) { @@ -626,6 +827,7 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) i=do_ssl3_write(s, type, &(buf[tot]), nw, 0); if (i <= 0) { + /* XXX should we ssl3_release_write_buffer if i<0? */ s->s3->wnum=tot; return i; } @@ -637,7 +839,11 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) /* next chunk of data should get another prepended empty fragment * in ciphersuites with known-IV weakness: */ s->s3->empty_fragment_done = 0; - + + if ((i==(int)n) && s->mode & SSL_MODE_RELEASE_BUFFERS && + !SSL_IS_DTLS(s)) + ssl3_release_write_buffer(s); + return tot+i; } @@ -700,6 +906,55 @@ static int do_ssl3_write(SSL *s, int type, const unsigned char *buf, goto err; } +#if 0 && !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK + if (type==SSL3_RT_APPLICATION_DATA && s->compress==NULL && + !SSL_USE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && /*!SSL_IS_DTLS(s) &&*/ + EVP_CIPHER_flags(s->enc_write_ctx->cipher)&EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) + do { + unsigned char aad[13]; + EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param = {NULL,aad,sizeof(aad),0}; + int packlen; + + memcpy(aad,s->s3->write_sequence,8); + aad[8]=type; + aad[9]=(unsigned char)(s->version>>8); + aad[10]=(unsigned char)(s->version); + aad[11]=(unsigned char)(len>>8); + aad[12]=(unsigned char)len; + packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, + EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, + sizeof(mb_param),&mb_param); + + if (packlen==0 || packlen > wb->len) break; + + mb_param.out = wb->buf; + mb_param.inp = buf; + mb_param.len = len; + EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, + EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, + sizeof(mb_param),&mb_param); + + s->s3->write_sequence[7] += mb_param.interleave; + if (s->s3->write_sequence[7] < mb_param.interleave) + { + int j=6; + while (j>=0 && (++s->s3->write_sequence[j--])==0) ; + } + + wb->offset=0; + wb->left = packlen; + + /* memorize arguments so that ssl3_write_pending can detect bad write retries later */ + s->s3->wpend_tot=len; + s->s3->wpend_buf=buf; + s->s3->wpend_type=type; + s->s3->wpend_ret=len; + + /* we now just need to write the buffer */ + return ssl3_write_pending(s,type,buf,len); + } while (0); +#endif + /* 'create_empty_fragment' is true only when this function calls itself */ if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done) { @@ -820,7 +1075,7 @@ static int do_ssl3_write(SSL *s, int type, const unsigned char *buf, * from wr->input. Length should be wr->length. * wr->data still points in the wb->buf */ - if (mac_size != 0) + if (!SSL_USE_ETM(s) && mac_size != 0) { if (s->method->ssl3_enc->mac(s,&(p[wr->length + eivlen]),1) < 0) goto err; @@ -840,6 +1095,13 @@ static int do_ssl3_write(SSL *s, int type, const unsigned char *buf, /* ssl3_enc can only have an error on read */ s->method->ssl3_enc->enc(s,1); + if (SSL_USE_ETM(s) && mac_size != 0) + { + if (s->method->ssl3_enc->mac(s,p + wr->length,1) < 0) + goto err; + wr->length+=mac_size; + } + /* record length after mac and block padding */ s2n(wr->length,plen); @@ -911,9 +1173,6 @@ int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, { wb->left=0; wb->offset+=i; - if (s->mode & SSL_MODE_RELEASE_BUFFERS && - !SSL_IS_DTLS(s)) - ssl3_release_write_buffer(s); s->rwstate=SSL_NOTHING; return(s->s3->wpend_ret); } @@ -1479,8 +1738,14 @@ int ssl3_do_change_cipher_spec(SSL *s) slen=s->method->ssl3_enc->client_finished_label_len; } - s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, + i = s->method->ssl3_enc->final_finish_mac(s, sender,slen,s->s3->tmp.peer_finish_md); + if (i == 0) + { + SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR); + return 0; + } + s->s3->tmp.peer_finish_md_len = i; return(1); }