| /* ssl/s2_pkt.c */ |
| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * 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: |
| * 1. Redistributions of source code must retain the copyright |
| * 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 the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * 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 |
| * 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 |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * 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) 1998-2001 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. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| * |
| * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * openssl-core@openssl.org. |
| * |
| * 5. Products derived from this software may not be called "OpenSSL" |
| * nor may "OpenSSL" appear in their names without prior written |
| * permission of the OpenSSL Project. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT 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. |
| * ==================================================================== |
| * |
| * This product includes cryptographic software written by Eric Young |
| * (eay@cryptsoft.com). This product includes software written by Tim |
| * Hudson (tjh@cryptsoft.com). |
| * |
| */ |
| |
| #include "ssl_locl.h" |
| #ifndef OPENSSL_NO_SSL2 |
| #include <openssl/opensslconf.h> |
| #if !defined(OPENSSL_SYS_STARBOARD) |
| # include <errno.h> |
| # include <stdio.h> |
| #endif // !defined(OPENSSL_SYS_STARBOARD) |
| # define USE_SOCKETS |
| |
| static int read_n(SSL *s, unsigned int n, unsigned int max, |
| unsigned int extend); |
| static int n_do_ssl_write(SSL *s, const unsigned char *buf, unsigned int len); |
| static int write_pending(SSL *s, const unsigned char *buf, unsigned int len); |
| static int ssl_mt_error(int n); |
| |
| /* |
| * SSL 2.0 imlementation for SSL_read/SSL_peek - This routine will return 0 |
| * to len bytes, decrypted etc if required. |
| */ |
| static int ssl2_read_internal(SSL *s, void *buf, int len, int peek) |
| { |
| int n; |
| unsigned char mac[MAX_MAC_SIZE]; |
| unsigned char *p; |
| int i; |
| int mac_size; |
| |
| ssl2_read_again: |
| if (SSL_in_init(s) && !s->in_handshake) { |
| n = s->handshake_func(s); |
| if (n < 0) |
| return (n); |
| if (n == 0) { |
| SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_SSL_HANDSHAKE_FAILURE); |
| return (-1); |
| } |
| } |
| |
| clear_sys_error(); |
| s->rwstate = SSL_NOTHING; |
| if (len <= 0) |
| return (len); |
| |
| if (s->s2->ract_data_length != 0) { /* read from buffer */ |
| if (len > s->s2->ract_data_length) |
| n = s->s2->ract_data_length; |
| else |
| n = len; |
| |
| OPENSSL_port_memcpy(buf, s->s2->ract_data, (unsigned int)n); |
| if (!peek) { |
| s->s2->ract_data_length -= n; |
| s->s2->ract_data += n; |
| if (s->s2->ract_data_length == 0) |
| s->rstate = SSL_ST_READ_HEADER; |
| } |
| |
| return (n); |
| } |
| |
| /* |
| * s->s2->ract_data_length == 0 Fill the buffer, then goto |
| * ssl2_read_again. |
| */ |
| |
| if (s->rstate == SSL_ST_READ_HEADER) { |
| if (s->first_packet) { |
| n = read_n(s, 5, SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2, 0); |
| if (n <= 0) |
| return (n); /* error or non-blocking */ |
| s->first_packet = 0; |
| p = s->packet; |
| if (!((p[0] & 0x80) && ((p[2] == SSL2_MT_CLIENT_HELLO) || |
| (p[2] == SSL2_MT_SERVER_HELLO)))) { |
| SSLerr(SSL_F_SSL2_READ_INTERNAL, |
| SSL_R_NON_SSLV2_INITIAL_PACKET); |
| return (-1); |
| } |
| } else { |
| n = read_n(s, 2, SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2, 0); |
| if (n <= 0) |
| return (n); /* error or non-blocking */ |
| } |
| /* part read stuff */ |
| |
| s->rstate = SSL_ST_READ_BODY; |
| p = s->packet; |
| /* Do header */ |
| /* |
| * s->s2->padding=0; |
| */ |
| s->s2->escape = 0; |
| s->s2->rlength = (((unsigned int)p[0]) << 8) | ((unsigned int)p[1]); |
| if ((p[0] & TWO_BYTE_BIT)) { /* Two byte header? */ |
| s->s2->three_byte_header = 0; |
| s->s2->rlength &= TWO_BYTE_MASK; |
| } else { |
| s->s2->three_byte_header = 1; |
| s->s2->rlength &= THREE_BYTE_MASK; |
| |
| /* security >s2->escape */ |
| s->s2->escape = ((p[0] & SEC_ESC_BIT)) ? 1 : 0; |
| } |
| } |
| |
| if (s->rstate == SSL_ST_READ_BODY) { |
| n = s->s2->rlength + 2 + s->s2->three_byte_header; |
| if (n > (int)s->packet_length) { |
| n -= s->packet_length; |
| i = read_n(s, (unsigned int)n, (unsigned int)n, 1); |
| if (i <= 0) |
| return (i); /* ERROR */ |
| } |
| |
| p = &(s->packet[2]); |
| s->rstate = SSL_ST_READ_HEADER; |
| if (s->s2->three_byte_header) |
| s->s2->padding = *(p++); |
| else |
| s->s2->padding = 0; |
| |
| /* Data portion */ |
| if (s->s2->clear_text) { |
| mac_size = 0; |
| s->s2->mac_data = p; |
| s->s2->ract_data = p; |
| if (s->s2->padding) { |
| SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_ILLEGAL_PADDING); |
| return (-1); |
| } |
| } else { |
| mac_size = EVP_MD_CTX_size(s->read_hash); |
| if (mac_size < 0) |
| return -1; |
| OPENSSL_assert(mac_size <= MAX_MAC_SIZE); |
| s->s2->mac_data = p; |
| s->s2->ract_data = &p[mac_size]; |
| if (s->s2->padding + mac_size > s->s2->rlength) { |
| SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_ILLEGAL_PADDING); |
| return (-1); |
| } |
| } |
| |
| s->s2->ract_data_length = s->s2->rlength; |
| /* |
| * added a check for length > max_size in case encryption was not |
| * turned on yet due to an error |
| */ |
| if ((!s->s2->clear_text) && |
| (s->s2->rlength >= (unsigned int)mac_size)) { |
| if (!ssl2_enc(s, 0)) { |
| SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_DECRYPTION_FAILED); |
| return (-1); |
| } |
| s->s2->ract_data_length -= mac_size; |
| ssl2_mac(s, mac, 0); |
| s->s2->ract_data_length -= s->s2->padding; |
| if ((CRYPTO_memcmp(mac, s->s2->mac_data, mac_size) != 0) || |
| (s->s2->rlength % |
| EVP_CIPHER_CTX_block_size(s->enc_read_ctx) != 0)) { |
| SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_BAD_MAC_DECODE); |
| return (-1); |
| } |
| } |
| INC32(s->s2->read_sequence); /* expect next number */ |
| /* s->s2->ract_data is now available for processing */ |
| |
| /* |
| * Possibly the packet that we just read had 0 actual data bytes. |
| * (SSLeay/OpenSSL itself never sends such packets; see ssl2_write.) |
| * In this case, returning 0 would be interpreted by the caller as |
| * indicating EOF, so it's not a good idea. Instead, we just |
| * continue reading; thus ssl2_read_internal may have to process |
| * multiple packets before it can return. [Note that using select() |
| * for blocking sockets *never* guarantees that the next SSL_read |
| * will not block -- the available data may contain incomplete |
| * packets, and except for SSL 2, renegotiation can confuse things |
| * even more.] |
| */ |
| |
| goto ssl2_read_again; /* This should really be "return |
| * ssl2_read(s,buf,len)", but that would |
| * allow for denial-of-service attacks if a C |
| * compiler is used that does not recognize |
| * end-recursion. */ |
| } else { |
| SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_BAD_STATE); |
| return (-1); |
| } |
| } |
| |
| int ssl2_read(SSL *s, void *buf, int len) |
| { |
| return ssl2_read_internal(s, buf, len, 0); |
| } |
| |
| int ssl2_peek(SSL *s, void *buf, int len) |
| { |
| return ssl2_read_internal(s, buf, len, 1); |
| } |
| |
| static int read_n(SSL *s, unsigned int n, unsigned int max, |
| unsigned int extend) |
| { |
| int i, off, newb; |
| |
| /* |
| * if there is stuff still in the buffer from a previous read, and there |
| * is more than we want, take some. |
| */ |
| if (s->s2->rbuf_left >= (int)n) { |
| if (extend) |
| s->packet_length += n; |
| else { |
| s->packet = &(s->s2->rbuf[s->s2->rbuf_offs]); |
| s->packet_length = n; |
| } |
| s->s2->rbuf_left -= n; |
| s->s2->rbuf_offs += n; |
| return (n); |
| } |
| |
| if (!s->read_ahead) |
| max = n; |
| if (max > (unsigned int)(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2)) |
| max = SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2; |
| |
| /* |
| * Else we want more than we have. First, if there is some left or we |
| * want to extend |
| */ |
| off = 0; |
| if ((s->s2->rbuf_left != 0) || ((s->packet_length != 0) && extend)) { |
| newb = s->s2->rbuf_left; |
| if (extend) { |
| off = s->packet_length; |
| if (s->packet != s->s2->rbuf) |
| OPENSSL_port_memcpy(s->s2->rbuf, s->packet, (unsigned int)newb + off); |
| } else if (s->s2->rbuf_offs != 0) { |
| OPENSSL_port_memcpy(s->s2->rbuf, &(s->s2->rbuf[s->s2->rbuf_offs]), |
| (unsigned int)newb); |
| s->s2->rbuf_offs = 0; |
| } |
| s->s2->rbuf_left = 0; |
| } else |
| newb = 0; |
| |
| /* |
| * off is the offset to start writing too. r->s2->rbuf_offs is the |
| * 'unread data', now 0. newb is the number of new bytes so far |
| */ |
| s->packet = s->s2->rbuf; |
| while (newb < (int)n) { |
| clear_sys_error(); |
| if (s->rbio != NULL) { |
| s->rwstate = SSL_READING; |
| i = BIO_read(s->rbio, (char *)&(s->s2->rbuf[off + newb]), |
| max - newb); |
| } else { |
| SSLerr(SSL_F_READ_N, SSL_R_READ_BIO_NOT_SET); |
| i = -1; |
| } |
| # ifdef PKT_DEBUG |
| if (s->debug & 0x01) |
| sleep(1); |
| # endif |
| if (i <= 0) { |
| s->s2->rbuf_left += newb; |
| return (i); |
| } |
| newb += i; |
| } |
| |
| /* record unread data */ |
| if (newb > (int)n) { |
| s->s2->rbuf_offs = n + off; |
| s->s2->rbuf_left = newb - n; |
| } else { |
| s->s2->rbuf_offs = 0; |
| s->s2->rbuf_left = 0; |
| } |
| if (extend) |
| s->packet_length += n; |
| else |
| s->packet_length = n; |
| s->rwstate = SSL_NOTHING; |
| return (n); |
| } |
| |
| int ssl2_write(SSL *s, const void *_buf, int len) |
| { |
| const unsigned char *buf = _buf; |
| unsigned int n, tot; |
| int i; |
| |
| if (SSL_in_init(s) && !s->in_handshake) { |
| i = s->handshake_func(s); |
| if (i < 0) |
| return (i); |
| if (i == 0) { |
| SSLerr(SSL_F_SSL2_WRITE, SSL_R_SSL_HANDSHAKE_FAILURE); |
| return (-1); |
| } |
| } |
| |
| if (s->error) { |
| ssl2_write_error(s); |
| if (s->error) |
| return (-1); |
| } |
| |
| clear_sys_error(); |
| s->rwstate = SSL_NOTHING; |
| if (len <= 0) |
| return (len); |
| |
| tot = s->s2->wnum; |
| s->s2->wnum = 0; |
| |
| n = (len - tot); |
| for (;;) { |
| i = n_do_ssl_write(s, &(buf[tot]), n); |
| if (i <= 0) { |
| s->s2->wnum = tot; |
| return (i); |
| } |
| if ((i == (int)n) || (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE)) { |
| return (tot + i); |
| } |
| |
| n -= i; |
| tot += i; |
| } |
| } |
| |
| static int write_pending(SSL *s, const unsigned char *buf, unsigned int len) |
| { |
| int i; |
| |
| /* s->s2->wpend_len != 0 MUST be true. */ |
| |
| /* |
| * check that they have given us the same buffer to write |
| */ |
| if ((s->s2->wpend_tot > (int)len) || |
| ((s->s2->wpend_buf != buf) && |
| !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER))) { |
| SSLerr(SSL_F_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY); |
| return (-1); |
| } |
| |
| for (;;) { |
| clear_sys_error(); |
| if (s->wbio != NULL) { |
| s->rwstate = SSL_WRITING; |
| i = BIO_write(s->wbio, |
| (char *)&(s->s2->write_ptr[s->s2->wpend_off]), |
| (unsigned int)s->s2->wpend_len); |
| } else { |
| SSLerr(SSL_F_WRITE_PENDING, SSL_R_WRITE_BIO_NOT_SET); |
| i = -1; |
| } |
| # ifdef PKT_DEBUG |
| if (s->debug & 0x01) |
| sleep(1); |
| # endif |
| if (i == s->s2->wpend_len) { |
| s->s2->wpend_len = 0; |
| s->rwstate = SSL_NOTHING; |
| return (s->s2->wpend_ret); |
| } else if (i <= 0) |
| return (i); |
| s->s2->wpend_off += i; |
| s->s2->wpend_len -= i; |
| } |
| } |
| |
| static int n_do_ssl_write(SSL *s, const unsigned char *buf, unsigned int len) |
| { |
| unsigned int j, k, olen, p, bs; |
| int mac_size; |
| register unsigned char *pp; |
| |
| olen = len; |
| |
| /* |
| * first check if there is data from an encryption waiting to be sent - |
| * it must be sent because the other end is waiting. This will happen |
| * with non-blocking IO. We print it and then return. |
| */ |
| if (s->s2->wpend_len != 0) |
| return (write_pending(s, buf, len)); |
| |
| /* set mac_size to mac size */ |
| if (s->s2->clear_text) |
| mac_size = 0; |
| else { |
| mac_size = EVP_MD_CTX_size(s->write_hash); |
| if (mac_size < 0) |
| return -1; |
| } |
| |
| /* lets set the pad p */ |
| if (s->s2->clear_text) { |
| if (len > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER) |
| len = SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER; |
| p = 0; |
| s->s2->three_byte_header = 0; |
| /* len=len; */ |
| } else { |
| bs = EVP_CIPHER_CTX_block_size(s->enc_read_ctx); |
| j = len + mac_size; |
| /* |
| * Two-byte headers allow for a larger record length than three-byte |
| * headers, but we can't use them if we need padding or if we have to |
| * set the escape bit. |
| */ |
| if ((j > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) && (!s->s2->escape)) { |
| if (j > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER) |
| j = SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER; |
| /* |
| * set k to the max number of bytes with 2 byte header |
| */ |
| k = j - (j % bs); |
| /* how many data bytes? */ |
| len = k - mac_size; |
| s->s2->three_byte_header = 0; |
| p = 0; |
| } else if ((bs <= 1) && (!s->s2->escape)) { |
| /*- |
| * j <= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER, thus |
| * j < SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER |
| */ |
| s->s2->three_byte_header = 0; |
| p = 0; |
| } else { /* we may have to use a 3 byte header */ |
| |
| /*- |
| * If s->s2->escape is not set, then |
| * j <= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER, and thus |
| * j < SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER. |
| */ |
| p = (j % bs); |
| p = (p == 0) ? 0 : (bs - p); |
| if (s->s2->escape) { |
| s->s2->three_byte_header = 1; |
| if (j > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) |
| j = SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER; |
| } else |
| s->s2->three_byte_header = (p == 0) ? 0 : 1; |
| } |
| } |
| |
| /*- |
| * Now |
| * j <= SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER |
| * holds, and if s->s2->three_byte_header is set, then even |
| * j <= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER. |
| */ |
| |
| /* |
| * mac_size is the number of MAC bytes len is the number of data bytes we |
| * are going to send p is the number of padding bytes (if it is a |
| * two-byte header, then p == 0) |
| */ |
| |
| s->s2->wlength = len; |
| s->s2->padding = p; |
| s->s2->mac_data = &(s->s2->wbuf[3]); |
| s->s2->wact_data = &(s->s2->wbuf[3 + mac_size]); |
| |
| /* |
| * It would be clearer to write this as follows: |
| * if (mac_size + len + p > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER) |
| * However |len| is user input that could in theory be very large. We |
| * know |mac_size| and |p| are small, so to avoid any possibility of |
| * overflow we write it like this. |
| * |
| * In theory this should never fail because the logic above should have |
| * modified |len| if it is too big. But we are being cautious. |
| */ |
| if (len > (SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER - (mac_size + p))) { |
| return -1; |
| } |
| /* we copy the data into s->s2->wbuf */ |
| OPENSSL_port_memcpy(s->s2->wact_data, buf, len); |
| if (p) |
| OPENSSL_port_memset(&(s->s2->wact_data[len]), 0, p); /* arbitrary padding */ |
| |
| if (!s->s2->clear_text) { |
| s->s2->wact_data_length = len + p; |
| ssl2_mac(s, s->s2->mac_data, 1); |
| s->s2->wlength += p + mac_size; |
| if (ssl2_enc(s, 1) < 1) |
| return -1; |
| } |
| |
| /* package up the header */ |
| s->s2->wpend_len = s->s2->wlength; |
| if (s->s2->three_byte_header) { /* 3 byte header */ |
| pp = s->s2->mac_data; |
| pp -= 3; |
| pp[0] = (s->s2->wlength >> 8) & (THREE_BYTE_MASK >> 8); |
| if (s->s2->escape) |
| pp[0] |= SEC_ESC_BIT; |
| pp[1] = s->s2->wlength & 0xff; |
| pp[2] = s->s2->padding; |
| s->s2->wpend_len += 3; |
| } else { |
| pp = s->s2->mac_data; |
| pp -= 2; |
| pp[0] = ((s->s2->wlength >> 8) & (TWO_BYTE_MASK >> 8)) | TWO_BYTE_BIT; |
| pp[1] = s->s2->wlength & 0xff; |
| s->s2->wpend_len += 2; |
| } |
| s->s2->write_ptr = pp; |
| |
| INC32(s->s2->write_sequence); /* expect next number */ |
| |
| /* lets try to actually write the data */ |
| s->s2->wpend_tot = olen; |
| s->s2->wpend_buf = buf; |
| |
| s->s2->wpend_ret = len; |
| |
| s->s2->wpend_off = 0; |
| return (write_pending(s, buf, olen)); |
| } |
| |
| int ssl2_part_read(SSL *s, unsigned long f, int i) |
| { |
| unsigned char *p; |
| int j; |
| |
| if (i < 0) { |
| /* ssl2_return_error(s); */ |
| /* |
| * for non-blocking io, this is not necessarily fatal |
| */ |
| return (i); |
| } else { |
| s->init_num += i; |
| |
| /* |
| * Check for error. While there are recoverable errors, this |
| * function is not called when those must be expected; any error |
| * detected here is fatal. |
| */ |
| if (s->init_num >= 3) { |
| p = (unsigned char *)s->init_buf->data; |
| if (p[0] == SSL2_MT_ERROR) { |
| j = (p[1] << 8) | p[2]; |
| SSLerr((int)f, ssl_mt_error(j)); |
| s->init_num -= 3; |
| if (s->init_num > 0) |
| OPENSSL_port_memmove(p, p + 3, s->init_num); |
| } |
| } |
| |
| /* |
| * If it's not an error message, we have some error anyway -- the |
| * message was shorter than expected. This too is treated as fatal |
| * (at least if SSL_get_error is asked for its opinion). |
| */ |
| return (0); |
| } |
| } |
| |
| int ssl2_do_write(SSL *s) |
| { |
| int ret; |
| |
| ret = ssl2_write(s, &s->init_buf->data[s->init_off], s->init_num); |
| if (ret == s->init_num) { |
| if (s->msg_callback) |
| s->msg_callback(1, s->version, 0, s->init_buf->data, |
| (size_t)(s->init_off + s->init_num), s, |
| s->msg_callback_arg); |
| return (1); |
| } |
| if (ret < 0) |
| return (-1); |
| s->init_off += ret; |
| s->init_num -= ret; |
| return (0); |
| } |
| |
| static int ssl_mt_error(int n) |
| { |
| int ret; |
| |
| switch (n) { |
| case SSL2_PE_NO_CIPHER: |
| ret = SSL_R_PEER_ERROR_NO_CIPHER; |
| break; |
| case SSL2_PE_NO_CERTIFICATE: |
| ret = SSL_R_PEER_ERROR_NO_CERTIFICATE; |
| break; |
| case SSL2_PE_BAD_CERTIFICATE: |
| ret = SSL_R_PEER_ERROR_CERTIFICATE; |
| break; |
| case SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE: |
| ret = SSL_R_PEER_ERROR_UNSUPPORTED_CERTIFICATE_TYPE; |
| break; |
| default: |
| ret = SSL_R_UNKNOWN_REMOTE_ERROR_TYPE; |
| break; |
| } |
| return (ret); |
| } |
| #else /* !OPENSSL_NO_SSL2 */ |
| |
| # if PEDANTIC |
| static void *dummy = &dummy; |
| # endif |
| |
| #endif |
