diff options
Diffstat (limited to 'ssl/statem/statem_dtls.c')
| -rw-r--r-- | ssl/statem/statem_dtls.c | 86 |
1 files changed, 52 insertions, 34 deletions
diff --git a/ssl/statem/statem_dtls.c b/ssl/statem/statem_dtls.c index 651e8c2ed8..d19fe0a0c4 100644 --- a/ssl/statem/statem_dtls.c +++ b/ssl/statem/statem_dtls.c @@ -415,8 +415,9 @@ static int dtls1_preprocess_fragment(SSL *s, struct hm_header_st *msg_hdr) /* sanity checking */ if ((frag_off + frag_len) > msg_len || msg_len > dtls1_max_handshake_message_len(s)) { - SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT, SSL_R_EXCESSIVE_MESSAGE_SIZE); - return SSL_AD_ILLEGAL_PARAMETER; + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS1_PREPROCESS_FRAGMENT, + SSL_R_EXCESSIVE_MESSAGE_SIZE); + return 0; } if (s->d1->r_msg_hdr.frag_off == 0) { /* first fragment */ @@ -425,8 +426,9 @@ static int dtls1_preprocess_fragment(SSL *s, struct hm_header_st *msg_hdr) * dtls_max_handshake_message_len(s) above */ if (!BUF_MEM_grow_clean(s->init_buf, msg_len + DTLS1_HM_HEADER_LENGTH)) { - SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT, ERR_R_BUF_LIB); - return SSL_AD_INTERNAL_ERROR; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_PREPROCESS_FRAGMENT, + ERR_R_BUF_LIB); + return 0; } s->s3->tmp.message_size = msg_len; @@ -439,13 +441,18 @@ static int dtls1_preprocess_fragment(SSL *s, struct hm_header_st *msg_hdr) * They must be playing with us! BTW, failure to enforce upper limit * would open possibility for buffer overrun. */ - SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT, SSL_R_EXCESSIVE_MESSAGE_SIZE); - return SSL_AD_ILLEGAL_PARAMETER; + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS1_PREPROCESS_FRAGMENT, + SSL_R_EXCESSIVE_MESSAGE_SIZE); + return 0; } - return 0; /* no error */ + return 1; } +/* + * Returns 1 if there is a buffered fragment available, 0 if not, or -1 on a + * fatal error. + */ static int dtls1_retrieve_buffered_fragment(SSL *s, size_t *len) { /*- @@ -456,7 +463,7 @@ static int dtls1_retrieve_buffered_fragment(SSL *s, size_t *len) */ pitem *item; hm_fragment *frag; - int al; + int ret; do { item = pqueue_peek(s->d1->buffered_messages); @@ -483,9 +490,10 @@ static int dtls1_retrieve_buffered_fragment(SSL *s, size_t *len) size_t frag_len = frag->msg_header.frag_len; pqueue_pop(s->d1->buffered_messages); - al = dtls1_preprocess_fragment(s, &frag->msg_header); + /* Calls SSLfatal() as required */ + ret = dtls1_preprocess_fragment(s, &frag->msg_header); - if (al == 0) { /* no alert */ + if (ret) { unsigned char *p = (unsigned char *)s->init_buf->data + DTLS1_HM_HEADER_LENGTH; memcpy(&p[frag->msg_header.frag_off], frag->fragment, @@ -495,14 +503,14 @@ static int dtls1_retrieve_buffered_fragment(SSL *s, size_t *len) dtls1_hm_fragment_free(frag); pitem_free(item); - if (al == 0) { + if (ret) { *len = frag_len; return 1; } - ssl3_send_alert(s, SSL3_AL_FATAL, al); + /* Fatal error */ s->init_num = 0; - return 0; + return -1; } else { return 0; } @@ -719,7 +727,7 @@ static int dtls_get_reassembled_message(SSL *s, int *errtype, size_t *len) { unsigned char wire[DTLS1_HM_HEADER_LENGTH]; size_t mlen, frag_off, frag_len; - int i, al, recvd_type; + int i, ret, recvd_type; struct hm_header_st msg_hdr; size_t readbytes; @@ -727,7 +735,12 @@ static int dtls_get_reassembled_message(SSL *s, int *errtype, size_t *len) redo: /* see if we have the required fragment already */ - if (dtls1_retrieve_buffered_fragment(s, &frag_len)) { + ret = dtls1_retrieve_buffered_fragment(s, &frag_len); + if (ret < 0) { + /* SSLfatal() already called */ + return 0; + } + if (ret > 0) { s->init_num = frag_len; *len = frag_len; return 1; @@ -743,9 +756,9 @@ static int dtls_get_reassembled_message(SSL *s, int *errtype, size_t *len) } if (recvd_type == SSL3_RT_CHANGE_CIPHER_SPEC) { if (wire[0] != SSL3_MT_CCS) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, - SSL_R_BAD_CHANGE_CIPHER_SPEC); + SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, + SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, + SSL_R_BAD_CHANGE_CIPHER_SPEC); goto f_err; } @@ -760,8 +773,8 @@ static int dtls_get_reassembled_message(SSL *s, int *errtype, size_t *len) /* Handshake fails if message header is incomplete */ if (readbytes != DTLS1_HM_HEADER_LENGTH) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); + SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, + SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); goto f_err; } @@ -777,8 +790,8 @@ static int dtls_get_reassembled_message(SSL *s, int *errtype, size_t *len) * Fragments must not span records. */ if (frag_len > RECORD_LAYER_get_rrec_length(&s->rlayer)) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_BAD_LENGTH); + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, + SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_BAD_LENGTH); goto f_err; } @@ -817,15 +830,17 @@ static int dtls_get_reassembled_message(SSL *s, int *errtype, size_t *len) goto redo; } else { /* Incorrectly formatted Hello request */ - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, - SSL_R_UNEXPECTED_MESSAGE); + SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, + SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, + SSL_R_UNEXPECTED_MESSAGE); goto f_err; } } - if ((al = dtls1_preprocess_fragment(s, &msg_hdr))) + if (!dtls1_preprocess_fragment(s, &msg_hdr)) { + /* SSLfatal() already called */ goto f_err; + } if (frag_len > 0) { unsigned char *p = @@ -852,8 +867,8 @@ static int dtls_get_reassembled_message(SSL *s, int *errtype, size_t *len) * to fail */ if (readbytes != frag_len) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_BAD_LENGTH); + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, + SSL_F_DTLS_GET_REASSEMBLED_MESSAGE, SSL_R_BAD_LENGTH); goto f_err; } @@ -867,7 +882,6 @@ static int dtls_get_reassembled_message(SSL *s, int *errtype, size_t *len) return 1; f_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); s->init_num = 0; *len = 0; return 0; @@ -888,8 +902,10 @@ int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt) s->d1->next_handshake_write_seq++; if (!WPACKET_put_bytes_u16(pkt, s->d1->handshake_write_seq)) { - SSLerr(SSL_F_DTLS_CONSTRUCT_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_DTLS_CONSTRUCT_CHANGE_CIPHER_SPEC, + ERR_R_INTERNAL_ERROR); + return 0; } } @@ -923,8 +939,9 @@ WORK_STATE dtls_wait_for_dry(SSL *s) int dtls1_read_failed(SSL *s, int code) { if (code > 0) { - SSLerr(SSL_F_DTLS1_READ_FAILED, ERR_R_INTERNAL_ERROR); - return 1; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_DTLS1_READ_FAILED, ERR_R_INTERNAL_ERROR); + return 0; } if (!dtls1_is_timer_expired(s)) { @@ -1065,7 +1082,8 @@ int dtls1_retransmit_message(SSL *s, unsigned short seq, int *found) item = pqueue_find(s->d1->sent_messages, seq64be); if (item == NULL) { - SSLerr(SSL_F_DTLS1_RETRANSMIT_MESSAGE, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_RETRANSMIT_MESSAGE, + ERR_R_INTERNAL_ERROR); *found = 0; return 0; } |