diff options
author | Ralf S. Engelschall <rse@openssl.org> | 1998-12-21 10:56:39 +0000 |
---|---|---|
committer | Ralf S. Engelschall <rse@openssl.org> | 1998-12-21 10:56:39 +0000 |
commit | 58964a492275ca9a59a0cd9c8155cb2491b4b909 (patch) | |
tree | c7b16876a5789463bbbb468ef4829c8129b3d718 /ssl/s3_pkt.c | |
parent | d02b48c63a58ea4367a0e905979f140b7d090f86 (diff) | |
download | openssl-58964a492275ca9a59a0cd9c8155cb2491b4b909.tar.gz |
Import of old SSLeay release: SSLeay 0.9.0b
Diffstat (limited to 'ssl/s3_pkt.c')
-rw-r--r-- | ssl/s3_pkt.c | 262 |
1 files changed, 180 insertions, 82 deletions
diff --git a/ssl/s3_pkt.c b/ssl/s3_pkt.c index 3be69ef138..2385080347 100644 --- a/ssl/s3_pkt.c +++ b/ssl/s3_pkt.c @@ -1,5 +1,5 @@ /* ssl/s3_pkt.c */ -/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written @@ -87,12 +87,14 @@ static int ssl3_write_pending(SSL *s, int type, char *buf, unsigned int len); static int ssl3_get_record(SSL *s); static int do_compress(SSL *ssl); static int do_uncompress(SSL *ssl); +static int do_change_cipher_spec(SSL *ssl); #else static int do_ssl3_write(); static int ssl3_write_pending(); static int ssl3_get_record(); static int do_compress(); static int do_uncompress(); +static int do_change_cipher_spec(); #endif static int ssl3_read_n(s,n,max,extend) @@ -159,7 +161,7 @@ int extend; while (newb < n) { - errno=0; + clear_sys_error(); if (s->rbio != NULL) { s->rwstate=SSL_READING; @@ -211,6 +213,7 @@ int extend; static int ssl3_get_record(s) SSL *s; { + char tmp_buf[512]; int ssl_major,ssl_minor,al; int n,i,ret= -1; SSL3_BUFFER *rb; @@ -226,7 +229,7 @@ SSL *s; rb= &(s->s3->rbuf); sess=s->session; - if (s->ctx->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) + if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) extra=SSL3_RT_MAX_EXTRA; else extra=0; @@ -257,25 +260,27 @@ again: } else { - if ( (ssl_major != SSL3_VERSION_MAJOR) || - (ssl_minor != SSL3_VERSION_MINOR)) - { - al=SSL3_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER); - goto f_err; - } + if (version != s->version) + { + SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER); + /* Send back error using their + * version number :-) */ + s->version=version; + al=SSL_AD_PROTOCOL_VERSION; + goto f_err; + } } - if (s->version != SSL3_VERSION_MAJOR) + if ((version>>8) != SSL3_VERSION_MAJOR) { - SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_INTERNAL_ERROR); + SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER); goto err; } if (rr->length > (unsigned int)SSL3_RT_MAX_ENCRYPTED_LENGTH+extra) { - al=SSL3_AD_ILLEGAL_PARAMETER; + al=SSL_AD_RECORD_OVERFLOW; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PACKET_LENGTH_TOO_LONG); goto f_err; } @@ -319,20 +324,25 @@ again: /* check is not needed I belive */ if (rr->length > (unsigned int)SSL3_RT_MAX_ENCRYPTED_LENGTH+extra) { - al=SSL3_AD_ILLEGAL_PARAMETER; + al=SSL_AD_RECORD_OVERFLOW; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_ENCRYPTED_LENGTH_TOO_LONG); goto f_err; } /* decrypt in place in 'rr->input' */ rr->data=rr->input; + memcpy(tmp_buf,rr->input,(rr->length > 512)?512:rr->length); - if (!ssl3_enc(s,0)) + if (!s->method->ssl3_enc->enc(s,0)) { - al=SSL3_AD_ILLEGAL_PARAMETER; + al=SSL_AD_DECRYPT_ERROR; goto f_err; } - +#ifdef TLS_DEBUG +printf("dec %d\n",rr->length); +{ int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':'\n'); } +printf("\n"); +#endif /* r->length is now the compressed data plus mac */ if ( (sess == NULL) || (s->enc_read_ctx == NULL) || @@ -345,24 +355,24 @@ again: if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra+mac_size) { - al=SSL3_AD_ILLEGAL_PARAMETER; + al=SSL_AD_RECORD_OVERFLOW; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PRE_MAC_LENGTH_TOO_LONG); goto f_err; } /* check MAC for rr->input' */ if (rr->length < mac_size) { - al=SSL3_AD_ILLEGAL_PARAMETER; + al=SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_LENGTH_TOO_SHORT); goto f_err; } rr->length-=mac_size; - i=ssl3_mac(s,md,0); + i=s->method->ssl3_enc->mac(s,md,0); if (memcmp(md,&(rr->data[rr->length]),mac_size) != 0) { - al=SSL3_AD_BAD_RECORD_MAC; + al=SSL_AD_BAD_RECORD_MAC; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_MAC_DECODE); - ret=SSL_RWERR_BAD_MAC_DECODE; + ret= -1; goto f_err; } } @@ -373,13 +383,13 @@ again: if (rr->length > (unsigned int)SSL3_RT_MAX_COMPRESSED_LENGTH+extra) { - al=SSL3_AD_ILLEGAL_PARAMETER; + al=SSL_AD_RECORD_OVERFLOW; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG); goto f_err; } if (!do_uncompress(s)) { - al=SSL3_AD_DECOMPRESSION_FAILURE; + al=SSL_AD_DECOMPRESSION_FAILURE; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_DECOMPRESSION); goto f_err; } @@ -387,7 +397,7 @@ again: if (rr->length > (unsigned int)SSL3_RT_MAX_PLAIN_LENGTH+extra) { - al=SSL3_AD_DECOMPRESSION_FAILURE; + al=SSL_AD_RECORD_OVERFLOW; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DATA_LENGTH_TOO_LONG); goto f_err; } @@ -426,7 +436,7 @@ SSL *ssl; return(1); } -/* Call this write a data +/* Call this to write data * It will return <= 0 if not all data has been sent or non-blocking IO. */ int ssl3_write_bytes(s,type,buf,len) @@ -460,7 +470,7 @@ int len; nw=SSL3_RT_MAX_PLAIN_LENGTH; else nw=n; - + i=do_ssl3_write(s,type,&(buf[tot]),nw); if (i <= 0) { @@ -526,8 +536,8 @@ unsigned int len; *(p++)=type&0xff; wr->type=type; - *(p++)=SSL3_VERSION_MAJOR; - *(p++)=SSL3_VERSION_MINOR; + *(p++)=(s->version>>8); + *(p++)=s->version&0xff; /* record where we are to write out packet length */ plen=p; @@ -562,14 +572,14 @@ unsigned int len; if (mac_size != 0) { - ssl3_mac(s,&(p[wr->length]),1); + s->method->ssl3_enc->mac(s,&(p[wr->length]),1); wr->length+=mac_size; wr->input=p; wr->data=p; } /* ssl3_enc can only have an error on read */ - ssl3_enc(s,1); + s->method->ssl3_enc->enc(s,1); /* record length after mac and block padding */ s2n(wr->length,plen); @@ -604,16 +614,17 @@ unsigned int len; { int i; - if ((s->s3->wpend_tot != (int)len) || (s->s3->wpend_buf != buf) +/* XXXX */ + if ((s->s3->wpend_tot > (int)len) || (s->s3->wpend_buf != buf) || (s->s3->wpend_type != type)) { SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BAD_WRITE_RETRY); - return(SSL_RWERR_BAD_WRITE_RETRY); + return(-1); } for (;;) { - errno=0; + clear_sys_error(); if (s->wbio != NULL) { s->rwstate=SSL_WRITING; @@ -647,14 +658,14 @@ int len; { int al,i,j,n,ret; SSL3_RECORD *rr; - unsigned char *sender; void (*cb)()=NULL; + BIO *bio; if (s->s3->rbuf.buf == NULL) /* Not initalised yet */ if (!ssl3_setup_buffers(s)) return(-1); - if (!s->in_handshake && SSL_in_before(s)) + if (!s->in_handshake && SSL_in_init(s)) { i=s->handshake_func(s); if (i < 0) return(i); @@ -684,7 +695,7 @@ start: if (s->s3->change_cipher_spec && (rr->type != SSL3_RT_HANDSHAKE)) { - al=SSL3_AD_UNEXPECTED_MESSAGE; + al=SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); goto err; } @@ -705,21 +716,25 @@ start: if ((rr->data[1] != 0) || (rr->data[2] != 0) || (rr->data[3] != 0)) { - al=SSL3_AD_ILLEGAL_PARAMETER; + al=SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CLIENT_REQUEST); goto err; } if (SSL_is_init_finished(s) && - !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) + !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) && + !s->s3->renegotiate) { ssl3_renegotiate(s); - n=s->handshake_func(s); - if (n < 0) return(n); - if (n == 0) + if (ssl3_renegotiate_check(s)) { - SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); - return(-1); + n=s->handshake_func(s); + if (n < 0) return(n); + if (n == 0) + { + SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); + return(-1); + } } } rr->length=0; @@ -734,7 +749,7 @@ start: { if ((rr->length != 2) || (rr->off != 0)) { - al=SSL3_AD_ILLEGAL_PARAMETER; + al=SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_ALERT_RECORD); goto f_err; } @@ -759,7 +774,7 @@ start: if (i == 1) { s->s3->warn_alert=n; - if (n == SSL3_AD_CLOSE_NOTIFY) + if (n == SSL_AD_CLOSE_NOTIFY) { s->shutdown|=SSL_RECEIVED_SHUTDOWN; return(0); @@ -767,16 +782,20 @@ start: } else if (i == 2) { + char tmp[16]; + s->rwstate=SSL_NOTHING; s->s3->fatal_alert=n; SSLerr(SSL_F_SSL3_READ_BYTES,1000+n); + sprintf(tmp,"%d",n); + ERR_add_error_data(2,"SSL alert number ",tmp); s->shutdown|=SSL_RECEIVED_SHUTDOWN; SSL_CTX_remove_session(s->ctx,s->session); return(0); } else { - al=SSL3_AD_ILLEGAL_PARAMETER; + al=SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNKNOWN_ALERT_TYPE); goto f_err; } @@ -797,43 +816,17 @@ start: if ( (rr->length != 1) || (rr->off != 0) || (rr->data[0] != SSL3_MT_CCS)) { - i=SSL3_AD_ILLEGAL_PARAMETER; + i=SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC); goto err; } rr->length=0; - s->s3->change_cipher_spec=1; - - if (s->state & SSL_ST_ACCEPT) - i=SSL3_CHANGE_CIPHER_SERVER_READ; - else - i=SSL3_CHANGE_CIPHER_CLIENT_READ; - - if (s->s3->tmp.key_block == NULL) - { - s->session->cipher=s->s3->tmp.new_cipher; - if (!ssl3_setup_key_block(s)) - goto err; - } - - if (!ssl3_change_cipher_state(s,i)) + if (!do_change_cipher_spec(s)) goto err; - - /* we have to record the message digest at - * this point so we can get it before we read - * the finished message */ - sender=(s->state & SSL_ST_CONNECT) - ?&(ssl3_server_finished_const[0]) - :&(ssl3_client_finished_const[0]); - - ssl3_final_finish_mac(s,&(s->s3->finish_dgst1), - sender,&(s->s3->tmp.finish_md1[0])); - ssl3_final_finish_mac(s,&(s->s3->finish_dgst2), - sender,&(s->s3->tmp.finish_md2[0])); - - goto start; + else + goto start; } /* else we have a handshake */ @@ -853,12 +846,68 @@ start: SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); return(-1); } - goto start; + + /* In the case where we try to read application data + * the first time, but we trigger an SSL handshake, we + * return -1 with the retry option set. I do this + * otherwise renegotiation can cause nasty problems + * in the non-blocking world */ + + s->rwstate=SSL_READING; + bio=SSL_get_rbio(s); + BIO_clear_retry_flags(bio); + BIO_set_retry_read(bio); + return(-1); } - al=SSL3_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD); - goto f_err; + switch (rr->type) + { + default: +#ifndef NO_TLS + /* TLS just ignores unknown message types */ + if (s->version == TLS1_VERSION) + { + goto start; + } +#endif + case SSL3_RT_CHANGE_CIPHER_SPEC: + case SSL3_RT_ALERT: + case SSL3_RT_HANDSHAKE: + al=SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD); + goto f_err; + case SSL3_RT_APPLICATION_DATA: + /* At this point, we were expecting something else, + * but have application data. What we do is set the + * error, and return -1. On the way out, if the + * library was running inside ssl3_read() and it makes + * sense to read application data at this point, we + * will indulge it. This will mostly happen during + * session renegotiation. + */ + if (s->s3->in_read_app_data && + (s->s3->total_renegotiations != 0) && + (( + (s->state & SSL_ST_CONNECT) && + (s->state >= SSL3_ST_CW_CLNT_HELLO_A) && + (s->state <= SSL3_ST_CR_SRVR_HELLO_A) + ) || ( + (s->state & SSL_ST_ACCEPT) && + (s->state <= SSL3_ST_SW_HELLO_REQ_A) && + (s->state >= SSL3_ST_SR_CLNT_HELLO_A) + ) + )) + { + s->s3->in_read_app_data=0; + return(-1); + } + else + { + al=SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD); + goto f_err; + } + } } /* make sure that we are not getting application data when we @@ -866,7 +915,7 @@ start: if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && (s->enc_read_ctx == NULL)) { - al=SSL3_AD_UNEXPECTED_MESSAGE; + al=SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_APP_DATA_IN_HANDSHAKE); goto f_err; } @@ -882,7 +931,10 @@ start: rr->length-=n; rr->off+=n; if (rr->length <= 0) + { s->rstate=SSL_ST_READ_HEADER; + rr->off=0; + } if (type == SSL3_RT_HANDSHAKE) ssl3_finish_mac(s,(unsigned char *)buf,n); @@ -893,6 +945,49 @@ err: return(-1); } +static int do_change_cipher_spec(s) +SSL *s; + { + int i; + unsigned char *sender; + int slen; + + if (s->state & SSL_ST_ACCEPT) + i=SSL3_CHANGE_CIPHER_SERVER_READ; + else + i=SSL3_CHANGE_CIPHER_CLIENT_READ; + + if (s->s3->tmp.key_block == NULL) + { + s->session->cipher=s->s3->tmp.new_cipher; + if (!s->method->ssl3_enc->setup_key_block(s)) return(0); + } + + if (!s->method->ssl3_enc->change_cipher_state(s,i)) + return(0); + + /* we have to record the message digest at + * this point so we can get it before we read + * the finished message */ + if (s->state & SSL_ST_CONNECT) + { + sender=s->method->ssl3_enc->server_finished; + slen=s->method->ssl3_enc->server_finished_len; + } + else + { + sender=s->method->ssl3_enc->client_finished; + slen=s->method->ssl3_enc->client_finished_len; + } + + s->method->ssl3_enc->final_finish_mac(s, + &(s->s3->finish_dgst1), + &(s->s3->finish_dgst2), + sender,slen,&(s->s3->tmp.finish_md[0])); + + return(1); + } + int ssl3_do_write(s,type) SSL *s; int type; @@ -914,6 +1009,9 @@ SSL *s; int level; int desc; { + /* Map tls/ssl alert value to correct one */ + desc=s->method->ssl3_enc->alert_value(desc); + if (desc < 0) return; /* If a fatal one, remove from cache */ if ((level == 2) && (s->session != NULL)) SSL_CTX_remove_session(s->ctx,s->session); |