From cd3d8b6f4c16680100acc89db5b955e2aa399daa Mon Sep 17 00:00:00 2001 From: jsing <> Date: Thu, 26 Jan 2017 05:51:54 +0000 Subject: Rename s3_{both,clnt,pkt_srvr}.c to have an ssl_ prefix since they are no longer SSLv3 code. ok beck@ --- src/lib/libssl/ssl_both.c | 748 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 748 insertions(+) create mode 100644 src/lib/libssl/ssl_both.c (limited to 'src/lib/libssl/ssl_both.c') diff --git a/src/lib/libssl/ssl_both.c b/src/lib/libssl/ssl_both.c new file mode 100644 index 0000000000..e556e336ed --- /dev/null +++ b/src/lib/libssl/ssl_both.c @@ -0,0 +1,748 @@ +/* $OpenBSD: ssl_both.c,v 1.1 2017/01/26 05:51:54 jsing Exp $ */ +/* 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) 1998-2002 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. + * + * 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). + * + */ +/* ==================================================================== + * 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 "bytestring.h" + +/* + * Send s->internal->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->internal->init_buf->data[s->internal->init_off], + s->internal->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. + */ + tls1_finish_mac(s, + (unsigned char *)&s->internal->init_buf->data[s->internal->init_off], ret); + + if (ret == s->internal->init_num) { + if (s->internal->msg_callback) + s->internal->msg_callback(1, s->version, type, s->internal->init_buf->data, + (size_t)(s->internal->init_off + s->internal->init_num), s, + s->internal->msg_callback_arg); + return (1); + } + + s->internal->init_off += ret; + s->internal->init_num -= ret; + + return (0); +} + +int +ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen) +{ + unsigned char *p; + int md_len; + + if (s->internal->state == a) { + md_len = s->method->internal->ssl3_enc->finish_mac_length; + OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); + + if (s->method->internal->ssl3_enc->final_finish_mac(s, sender, slen, + S3I(s)->tmp.finish_md) != md_len) + return (0); + S3I(s)->tmp.finish_md_len = md_len; + + /* Copy finished so we can use it for renegotiation checks. */ + if (s->internal->type == SSL_ST_CONNECT) { + memcpy(S3I(s)->previous_client_finished, + S3I(s)->tmp.finish_md, md_len); + S3I(s)->previous_client_finished_len = md_len; + } else { + memcpy(S3I(s)->previous_server_finished, + S3I(s)->tmp.finish_md, md_len); + S3I(s)->previous_server_finished_len = md_len; + } + + p = ssl3_handshake_msg_start(s, SSL3_MT_FINISHED); + memcpy(p, S3I(s)->tmp.finish_md, md_len); + ssl3_handshake_msg_finish(s, md_len); + + s->internal->state = b; + } + + return (ssl3_handshake_write(s)); +} + +/* + * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen + * so 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 (S3I(s)->tmp.new_cipher == NULL) + return; + + if (s->internal->state & SSL_ST_CONNECT) { + sender = s->method->internal->ssl3_enc->server_finished_label; + slen = s->method->internal->ssl3_enc->server_finished_label_len; + } else { + sender = s->method->internal->ssl3_enc->client_finished_label; + slen = s->method->internal->ssl3_enc->client_finished_label_len; + } + + S3I(s)->tmp.peer_finish_md_len = + s->method->internal->ssl3_enc->final_finish_mac(s, sender, slen, + S3I(s)->tmp.peer_finish_md); +} + +int +ssl3_get_finished(SSL *s, int a, int b) +{ + int al, ok, md_len; + long n; + CBS cbs; + + /* should actually be 36+4 :-) */ + n = s->method->internal->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok); + if (!ok) + return ((int)n); + + /* If this occurs, we have missed a message */ + if (!S3I(s)->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; + } + S3I(s)->change_cipher_spec = 0; + + md_len = s->method->internal->ssl3_enc->finish_mac_length; + + if (n < 0) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_BAD_DIGEST_LENGTH); + goto f_err; + } + + CBS_init(&cbs, s->internal->init_msg, n); + + if (S3I(s)->tmp.peer_finish_md_len != md_len || + CBS_len(&cbs) != md_len) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_BAD_DIGEST_LENGTH); + goto f_err; + } + + if (!CBS_mem_equal(&cbs, S3I(s)->tmp.peer_finish_md, CBS_len(&cbs))) { + al = SSL_AD_DECRYPT_ERROR; + SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_DIGEST_CHECK_FAILED); + goto f_err; + } + + /* Copy finished so we can use it for renegotiation checks. */ + OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); + if (s->internal->type == SSL_ST_ACCEPT) { + memcpy(S3I(s)->previous_client_finished, + S3I(s)->tmp.peer_finish_md, md_len); + S3I(s)->previous_client_finished_len = md_len; + } else { + memcpy(S3I(s)->previous_server_finished, + S3I(s)->tmp.peer_finish_md, md_len); + S3I(s)->previous_server_finished_len = md_len; + } + + 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->internal->read_sequence zero + * ssl->s3->internal->read_mac_secret re-init + * ssl->session->read_sym_enc assign + * ssl->session->read_hash assign + */ +int +ssl3_send_change_cipher_spec(SSL *s, int a, int b) +{ + unsigned char *p; + + if (s->internal->state == a) { + p = (unsigned char *)s->internal->init_buf->data; + *p = SSL3_MT_CCS; + s->internal->init_num = 1; + s->internal->init_off = 0; + + s->internal->state = b; + } + + /* SSL3_ST_CW_CHANGE_B */ + return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC)); +} + +static int +ssl3_add_cert(CBB *cbb, X509 *x) +{ + unsigned char *data; + int cert_len; + int ret = 0; + CBB cert; + + if ((cert_len = i2d_X509(x, NULL)) < 0) + goto err; + + if (!CBB_add_u24_length_prefixed(cbb, &cert)) + goto err; + if (!CBB_add_space(&cert, &data, cert_len)) + goto err; + if (i2d_X509(x, &data) < 0) + goto err; + if (!CBB_flush(cbb)) + goto err; + + ret = 1; + + err: + return (ret); +} + +int +ssl3_output_cert_chain(SSL *s, CBB *cbb, X509 *x) +{ + int no_chain = 0; + CBB cert_list; + int ret = 0; + int i; + + if (!CBB_add_u24_length_prefixed(cbb, &cert_list)) + goto err; + + if ((s->internal->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs) + no_chain = 1; + + /* TLSv1 sends a chain with nothing in it, instead of an alert. */ + if (x != NULL) { + if (no_chain) { + if (!ssl3_add_cert(&cert_list, x)) + goto err; + } else { + X509_STORE_CTX xs_ctx; + + if (!X509_STORE_CTX_init(&xs_ctx, s->ctx->cert_store, + x, NULL)) { + SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, + ERR_R_X509_LIB); + goto err; + } + X509_verify_cert(&xs_ctx); + + /* Don't leave errors in the queue. */ + ERR_clear_error(); + for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) { + x = sk_X509_value(xs_ctx.chain, i); + if (!ssl3_add_cert(&cert_list, x)) { + X509_STORE_CTX_cleanup(&xs_ctx); + goto err; + } + } + X509_STORE_CTX_cleanup(&xs_ctx); + } + } + + /* Thawte special :-) */ + for (i = 0; i < sk_X509_num(s->ctx->extra_certs); i++) { + x = sk_X509_value(s->ctx->extra_certs, i); + if (!ssl3_add_cert(&cert_list, x)) + goto err; + } + + if (!CBB_flush(cbb)) + goto err; + + ret = 1; + + err: + return (ret); +} + +/* + * 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; + uint32_t l; + long n; + int i, al; + CBS cbs; + uint8_t u8; + + if (S3I(s)->tmp.reuse_message) { + S3I(s)->tmp.reuse_message = 0; + if ((mt >= 0) && (S3I(s)->tmp.message_type != mt)) { + al = SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_SSL3_GET_MESSAGE, + SSL_R_UNEXPECTED_MESSAGE); + goto f_err; + } + *ok = 1; + s->internal->init_msg = s->internal->init_buf->data + 4; + s->internal->init_num = (int)S3I(s)->tmp.message_size; + return s->internal->init_num; + } + + p = (unsigned char *)s->internal->init_buf->data; + + /* s->internal->init_num < 4 */ + if (s->internal->state == st1) { + int skip_message; + + do { + while (s->internal->init_num < 4) { + i = s->method->internal->ssl_read_bytes(s, + SSL3_RT_HANDSHAKE, &p[s->internal->init_num], + 4 - s->internal->init_num, 0); + if (i <= 0) { + s->internal->rwstate = SSL_READING; + *ok = 0; + return i; + } + s->internal->init_num += i; + } + + skip_message = 0; + if (!s->server && 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->internal->init_num = 0; + skip_message = 1; + + if (s->internal->msg_callback) + s->internal->msg_callback(0, s->version, + SSL3_RT_HANDSHAKE, p, 4, s, + s->internal->msg_callback_arg); + } + } + } while (skip_message); + + /* s->internal->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; + } + + CBS_init(&cbs, p, 4); + if (!CBS_get_u8(&cbs, &u8) || + !CBS_get_u24(&cbs, &l)) { + SSLerr(SSL_F_SSL3_GET_MESSAGE, ERR_R_BUF_LIB); + goto err; + } + S3I(s)->tmp.message_type = u8; + + 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_clean(s->internal->init_buf, l + 4)) { + SSLerr(SSL_F_SSL3_GET_MESSAGE, ERR_R_BUF_LIB); + goto err; + } + S3I(s)->tmp.message_size = l; + s->internal->state = stn; + + s->internal->init_msg = s->internal->init_buf->data + 4; + s->internal->init_num = 0; + } + + /* next state (stn) */ + p = s->internal->init_msg; + n = S3I(s)->tmp.message_size - s->internal->init_num; + while (n > 0) { + i = s->method->internal->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, + &p[s->internal->init_num], n, 0); + if (i <= 0) { + s->internal->rwstate = SSL_READING; + *ok = 0; + return i; + } + s->internal->init_num += i; + n -= i; + } + + /* If receiving Finished, record MAC of prior handshake messages for + * Finished verification. */ + if (*s->internal->init_buf->data == SSL3_MT_FINISHED) + ssl3_take_mac(s); + + /* Feed this message into MAC computation. */ + if (s->internal->mac_packet) { + tls1_finish_mac(s, (unsigned char *)s->internal->init_buf->data, + s->internal->init_num + 4); + s->internal->mac_packet = 0; + + if (s->internal->msg_callback) + s->internal->msg_callback(0, s->version, + SSL3_RT_HANDSHAKE, s->internal->init_buf->data, + (size_t)s->internal->init_num + 4, s, + s->internal->msg_callback_arg); + } + + *ok = 1; + return (s->internal->init_num); + +f_err: + ssl3_send_alert(s, SSL3_AL_FATAL, al); +err: + *ok = 0; + return (-1); +} + +int +ssl_cert_type(X509 *x, EVP_PKEY *pkey) +{ + 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; + } else if (i == EVP_PKEY_EC) { + ret = SSL_PKEY_ECC; + } else if (i == NID_id_GostR3410_2001 || + i == NID_id_GostR3410_2001_cc) { + ret = SSL_PKEY_GOST01; + } + +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: + 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 +ssl3_setup_init_buffer(SSL *s) +{ + BUF_MEM *buf = NULL; + + if (s->internal->init_buf != NULL) + return (1); + + if ((buf = BUF_MEM_new()) == NULL) + goto err; + if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) + goto err; + + s->internal->init_buf = buf; + return (1); + +err: + BUF_MEM_free(buf); + return (0); +} + +int +ssl3_setup_read_buffer(SSL *s) +{ + unsigned char *p; + size_t len, align, headerlen; + + if (SSL_IS_DTLS(s)) + headerlen = DTLS1_RT_HEADER_LENGTH; + else + headerlen = SSL3_RT_HEADER_LENGTH; + + align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); + + if (s->s3->rbuf.buf == NULL) { + len = SSL3_RT_MAX_PLAIN_LENGTH + + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; + if ((p = malloc(len)) == NULL) + goto err; + s->s3->rbuf.buf = p; + s->s3->rbuf.len = len; + } + + s->internal->packet = &(s->s3->rbuf.buf[0]); + return 1; + +err: + SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE); + return 0; +} + +int +ssl3_setup_write_buffer(SSL *s) +{ + unsigned char *p; + size_t len, align, headerlen; + + if (SSL_IS_DTLS(s)) + headerlen = DTLS1_RT_HEADER_LENGTH + 1; + else + headerlen = SSL3_RT_HEADER_LENGTH; + + align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); + + if (s->s3->wbuf.buf == NULL) { + len = s->max_send_fragment + + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; + if (!(s->internal->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) + len += headerlen + align + + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; + + if ((p = malloc(len)) == NULL) + goto err; + s->s3->wbuf.buf = p; + s->s3->wbuf.len = len; + } + + return 1; + +err: + SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, ERR_R_MALLOC_FAILURE); + return 0; +} + +int +ssl3_setup_buffers(SSL *s) +{ + if (!ssl3_setup_read_buffer(s)) + return 0; + if (!ssl3_setup_write_buffer(s)) + return 0; + return 1; +} + +int +ssl3_release_write_buffer(SSL *s) +{ + free(s->s3->wbuf.buf); + s->s3->wbuf.buf = NULL; + return 1; +} + +int +ssl3_release_read_buffer(SSL *s) +{ + free(s->s3->rbuf.buf); + s->s3->rbuf.buf = NULL; + return 1; +} -- cgit v1.2.3-55-g6feb