502 lines
15 KiB
C
502 lines
15 KiB
C
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/*
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* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright 2005 Nokia. All rights reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "ssl_local.h"
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#include <openssl/evp.h>
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#include <openssl/md5.h>
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#include <openssl/core_names.h>
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#include "internal/cryptlib.h"
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static int ssl3_generate_key_block(SSL_CONNECTION *s, unsigned char *km, int num)
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{
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const EVP_MD *md5 = NULL, *sha1 = NULL;
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EVP_MD_CTX *m5;
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EVP_MD_CTX *s1;
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unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
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unsigned char c = 'A';
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unsigned int i, k;
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int ret = 0;
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SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
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#ifdef CHARSET_EBCDIC
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c = os_toascii[c]; /* 'A' in ASCII */
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#endif
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k = 0;
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md5 = ssl_evp_md_fetch(sctx->libctx, NID_md5, sctx->propq);
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sha1 = ssl_evp_md_fetch(sctx->libctx, NID_sha1, sctx->propq);
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m5 = EVP_MD_CTX_new();
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s1 = EVP_MD_CTX_new();
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if (md5 == NULL || sha1 == NULL || m5 == NULL || s1 == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
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goto err;
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}
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for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
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k++;
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if (k > sizeof(buf)) {
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/* bug: 'buf' is too small for this ciphersuite */
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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memset(buf, c, k);
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c++;
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if (!EVP_DigestInit_ex(s1, sha1, NULL)
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|| !EVP_DigestUpdate(s1, buf, k)
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|| !EVP_DigestUpdate(s1, s->session->master_key,
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s->session->master_key_length)
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|| !EVP_DigestUpdate(s1, s->s3.server_random, SSL3_RANDOM_SIZE)
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|| !EVP_DigestUpdate(s1, s->s3.client_random, SSL3_RANDOM_SIZE)
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|| !EVP_DigestFinal_ex(s1, smd, NULL)
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|| !EVP_DigestInit_ex(m5, md5, NULL)
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|| !EVP_DigestUpdate(m5, s->session->master_key,
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s->session->master_key_length)
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|| !EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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if ((int)(i + MD5_DIGEST_LENGTH) > num) {
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if (!EVP_DigestFinal_ex(m5, smd, NULL)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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memcpy(km, smd, (num - i));
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} else {
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if (!EVP_DigestFinal_ex(m5, km, NULL)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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}
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km += MD5_DIGEST_LENGTH;
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}
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OPENSSL_cleanse(smd, sizeof(smd));
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ret = 1;
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err:
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EVP_MD_CTX_free(m5);
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EVP_MD_CTX_free(s1);
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ssl_evp_md_free(md5);
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ssl_evp_md_free(sha1);
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return ret;
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}
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int ssl3_change_cipher_state(SSL_CONNECTION *s, int which)
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{
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unsigned char *p, *mac_secret;
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size_t md_len;
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unsigned char *key, *iv;
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const EVP_CIPHER *ciph;
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const SSL_COMP *comp = NULL;
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const EVP_MD *md;
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int mdi;
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size_t n, iv_len, key_len;
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int direction = (which & SSL3_CC_READ) != 0 ? OSSL_RECORD_DIRECTION_READ
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: OSSL_RECORD_DIRECTION_WRITE;
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ciph = s->s3.tmp.new_sym_enc;
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md = s->s3.tmp.new_hash;
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/* m == NULL will lead to a crash later */
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if (!ossl_assert(md != NULL)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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#ifndef OPENSSL_NO_COMP
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comp = s->s3.tmp.new_compression;
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#endif
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p = s->s3.tmp.key_block;
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mdi = EVP_MD_get_size(md);
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if (mdi < 0) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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md_len = (size_t)mdi;
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key_len = EVP_CIPHER_get_key_length(ciph);
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iv_len = EVP_CIPHER_get_iv_length(ciph);
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if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
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(which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
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mac_secret = &(p[0]);
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n = md_len + md_len;
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key = &(p[n]);
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n += key_len + key_len;
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iv = &(p[n]);
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n += iv_len + iv_len;
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} else {
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n = md_len;
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mac_secret = &(p[n]);
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n += md_len + key_len;
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key = &(p[n]);
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n += key_len + iv_len;
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iv = &(p[n]);
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n += iv_len;
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}
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if (n > s->s3.tmp.key_block_length) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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if (!ssl_set_new_record_layer(s, SSL3_VERSION,
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direction,
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OSSL_RECORD_PROTECTION_LEVEL_APPLICATION,
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NULL, 0, key, key_len, iv, iv_len, mac_secret,
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md_len, ciph, 0, NID_undef, md, comp, NULL)) {
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/* SSLfatal already called */
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goto err;
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}
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return 1;
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err:
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return 0;
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}
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int ssl3_setup_key_block(SSL_CONNECTION *s)
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{
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unsigned char *p;
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const EVP_CIPHER *c;
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const EVP_MD *hash;
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int num;
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int ret = 0;
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SSL_COMP *comp;
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if (s->s3.tmp.key_block_length != 0)
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return 1;
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if (!ssl_cipher_get_evp(SSL_CONNECTION_GET_CTX(s), s->session, &c, &hash,
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NULL, NULL, &comp, 0)) {
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/* Error is already recorded */
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SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR);
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return 0;
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}
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ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
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s->s3.tmp.new_sym_enc = c;
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ssl_evp_md_free(s->s3.tmp.new_hash);
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s->s3.tmp.new_hash = hash;
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#ifdef OPENSSL_NO_COMP
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s->s3.tmp.new_compression = NULL;
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#else
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s->s3.tmp.new_compression = comp;
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#endif
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num = EVP_MD_get_size(hash);
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if (num < 0)
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return 0;
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num = EVP_CIPHER_get_key_length(c) + num + EVP_CIPHER_get_iv_length(c);
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num *= 2;
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ssl3_cleanup_key_block(s);
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if ((p = OPENSSL_malloc(num)) == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB);
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return 0;
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}
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s->s3.tmp.key_block_length = num;
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s->s3.tmp.key_block = p;
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/* Calls SSLfatal() as required */
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ret = ssl3_generate_key_block(s, p, num);
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return ret;
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}
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void ssl3_cleanup_key_block(SSL_CONNECTION *s)
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{
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OPENSSL_clear_free(s->s3.tmp.key_block, s->s3.tmp.key_block_length);
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s->s3.tmp.key_block = NULL;
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s->s3.tmp.key_block_length = 0;
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}
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int ssl3_init_finished_mac(SSL_CONNECTION *s)
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{
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BIO *buf = BIO_new(BIO_s_mem());
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if (buf == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BIO_LIB);
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return 0;
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}
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ssl3_free_digest_list(s);
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s->s3.handshake_buffer = buf;
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(void)BIO_set_close(s->s3.handshake_buffer, BIO_CLOSE);
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return 1;
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}
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/*
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* Free digest list. Also frees handshake buffer since they are always freed
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* together.
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*/
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void ssl3_free_digest_list(SSL_CONNECTION *s)
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{
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BIO_free(s->s3.handshake_buffer);
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s->s3.handshake_buffer = NULL;
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EVP_MD_CTX_free(s->s3.handshake_dgst);
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s->s3.handshake_dgst = NULL;
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}
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int ssl3_finish_mac(SSL_CONNECTION *s, const unsigned char *buf, size_t len)
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{
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int ret;
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if (s->s3.handshake_dgst == NULL) {
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/* Note: this writes to a memory BIO so a failure is a fatal error */
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if (len > INT_MAX) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_OVERFLOW_ERROR);
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return 0;
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}
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ret = BIO_write(s->s3.handshake_buffer, (void *)buf, (int)len);
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if (ret <= 0 || ret != (int)len) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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return 0;
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}
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} else {
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ret = EVP_DigestUpdate(s->s3.handshake_dgst, buf, len);
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if (!ret) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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return 0;
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}
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}
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return 1;
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}
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int ssl3_digest_cached_records(SSL_CONNECTION *s, int keep)
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{
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const EVP_MD *md;
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long hdatalen;
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void *hdata;
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if (s->s3.handshake_dgst == NULL) {
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hdatalen = BIO_get_mem_data(s->s3.handshake_buffer, &hdata);
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if (hdatalen <= 0) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_LENGTH);
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return 0;
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}
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s->s3.handshake_dgst = EVP_MD_CTX_new();
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if (s->s3.handshake_dgst == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
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return 0;
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}
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md = ssl_handshake_md(s);
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if (md == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR,
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SSL_R_NO_SUITABLE_DIGEST_ALGORITHM);
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return 0;
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}
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if (!EVP_DigestInit_ex(s->s3.handshake_dgst, md, NULL)
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|| !EVP_DigestUpdate(s->s3.handshake_dgst, hdata, hdatalen)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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return 0;
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}
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}
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if (keep == 0) {
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BIO_free(s->s3.handshake_buffer);
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s->s3.handshake_buffer = NULL;
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}
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return 1;
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}
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void ssl3_digest_master_key_set_params(const SSL_SESSION *session,
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OSSL_PARAM params[])
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{
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int n = 0;
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params[n++] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
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(void *)session->master_key,
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session->master_key_length);
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params[n++] = OSSL_PARAM_construct_end();
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}
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size_t ssl3_final_finish_mac(SSL_CONNECTION *s, const char *sender, size_t len,
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unsigned char *p)
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{
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int ret;
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EVP_MD_CTX *ctx = NULL;
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if (!ssl3_digest_cached_records(s, 0)) {
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/* SSLfatal() already called */
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return 0;
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}
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if (EVP_MD_CTX_get_type(s->s3.handshake_dgst) != NID_md5_sha1) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_REQUIRED_DIGEST);
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return 0;
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}
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ctx = EVP_MD_CTX_new();
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if (ctx == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
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return 0;
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}
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if (!EVP_MD_CTX_copy_ex(ctx, s->s3.handshake_dgst)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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ret = 0;
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goto err;
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}
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ret = EVP_MD_CTX_get_size(ctx);
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if (ret < 0) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
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ret = 0;
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goto err;
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||
|
|
}
|
||
|
|
|
||
|
|
if (sender != NULL) {
|
||
|
|
OSSL_PARAM digest_cmd_params[3];
|
||
|
|
|
||
|
|
ssl3_digest_master_key_set_params(s->session, digest_cmd_params);
|
||
|
|
|
||
|
|
if (EVP_DigestUpdate(ctx, sender, len) <= 0
|
||
|
|
|| EVP_MD_CTX_set_params(ctx, digest_cmd_params) <= 0
|
||
|
|
|| EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
|
||
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
|
||
|
|
ret = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
err:
|
||
|
|
EVP_MD_CTX_free(ctx);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ssl3_generate_master_secret(SSL_CONNECTION *s, unsigned char *out,
|
||
|
|
unsigned char *p,
|
||
|
|
size_t len, size_t *secret_size)
|
||
|
|
{
|
||
|
|
static const unsigned char *salt[3] = {
|
||
|
|
#ifndef CHARSET_EBCDIC
|
||
|
|
(const unsigned char *)"A",
|
||
|
|
(const unsigned char *)"BB",
|
||
|
|
(const unsigned char *)"CCC",
|
||
|
|
#else
|
||
|
|
(const unsigned char *)"\x41",
|
||
|
|
(const unsigned char *)"\x42\x42",
|
||
|
|
(const unsigned char *)"\x43\x43\x43",
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
unsigned char buf[EVP_MAX_MD_SIZE];
|
||
|
|
EVP_MD_CTX *ctx = EVP_MD_CTX_new();
|
||
|
|
int i, ret = 1;
|
||
|
|
unsigned int n;
|
||
|
|
size_t ret_secret_size = 0;
|
||
|
|
|
||
|
|
if (ctx == NULL) {
|
||
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
for (i = 0; i < 3; i++) {
|
||
|
|
if (EVP_DigestInit_ex(ctx, SSL_CONNECTION_GET_CTX(s)->sha1, NULL) <= 0
|
||
|
|
|| EVP_DigestUpdate(ctx, salt[i],
|
||
|
|
strlen((const char *)salt[i])) <= 0
|
||
|
|
|| EVP_DigestUpdate(ctx, p, len) <= 0
|
||
|
|
|| EVP_DigestUpdate(ctx, &(s->s3.client_random[0]),
|
||
|
|
SSL3_RANDOM_SIZE) <= 0
|
||
|
|
|| EVP_DigestUpdate(ctx, &(s->s3.server_random[0]),
|
||
|
|
SSL3_RANDOM_SIZE) <= 0
|
||
|
|
|| EVP_DigestFinal_ex(ctx, buf, &n) <= 0
|
||
|
|
|| EVP_DigestInit_ex(ctx, SSL_CONNECTION_GET_CTX(s)->md5, NULL) <= 0
|
||
|
|
|| EVP_DigestUpdate(ctx, p, len) <= 0
|
||
|
|
|| EVP_DigestUpdate(ctx, buf, n) <= 0
|
||
|
|
|| EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
|
||
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
|
||
|
|
ret = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
out += n;
|
||
|
|
ret_secret_size += n;
|
||
|
|
}
|
||
|
|
EVP_MD_CTX_free(ctx);
|
||
|
|
|
||
|
|
OPENSSL_cleanse(buf, sizeof(buf));
|
||
|
|
if (ret)
|
||
|
|
*secret_size = ret_secret_size;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ssl3_alert_code(int code)
|
||
|
|
{
|
||
|
|
switch (code) {
|
||
|
|
case SSL_AD_CLOSE_NOTIFY:
|
||
|
|
return SSL3_AD_CLOSE_NOTIFY;
|
||
|
|
case SSL_AD_UNEXPECTED_MESSAGE:
|
||
|
|
return SSL3_AD_UNEXPECTED_MESSAGE;
|
||
|
|
case SSL_AD_BAD_RECORD_MAC:
|
||
|
|
return SSL3_AD_BAD_RECORD_MAC;
|
||
|
|
case SSL_AD_DECRYPTION_FAILED:
|
||
|
|
return SSL3_AD_BAD_RECORD_MAC;
|
||
|
|
case SSL_AD_RECORD_OVERFLOW:
|
||
|
|
return SSL3_AD_BAD_RECORD_MAC;
|
||
|
|
case SSL_AD_DECOMPRESSION_FAILURE:
|
||
|
|
return SSL3_AD_DECOMPRESSION_FAILURE;
|
||
|
|
case SSL_AD_HANDSHAKE_FAILURE:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_NO_CERTIFICATE:
|
||
|
|
return SSL3_AD_NO_CERTIFICATE;
|
||
|
|
case SSL_AD_BAD_CERTIFICATE:
|
||
|
|
return SSL3_AD_BAD_CERTIFICATE;
|
||
|
|
case SSL_AD_UNSUPPORTED_CERTIFICATE:
|
||
|
|
return SSL3_AD_UNSUPPORTED_CERTIFICATE;
|
||
|
|
case SSL_AD_CERTIFICATE_REVOKED:
|
||
|
|
return SSL3_AD_CERTIFICATE_REVOKED;
|
||
|
|
case SSL_AD_CERTIFICATE_EXPIRED:
|
||
|
|
return SSL3_AD_CERTIFICATE_EXPIRED;
|
||
|
|
case SSL_AD_CERTIFICATE_UNKNOWN:
|
||
|
|
return SSL3_AD_CERTIFICATE_UNKNOWN;
|
||
|
|
case SSL_AD_ILLEGAL_PARAMETER:
|
||
|
|
return SSL3_AD_ILLEGAL_PARAMETER;
|
||
|
|
case SSL_AD_UNKNOWN_CA:
|
||
|
|
return SSL3_AD_BAD_CERTIFICATE;
|
||
|
|
case SSL_AD_ACCESS_DENIED:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_DECODE_ERROR:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_DECRYPT_ERROR:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_EXPORT_RESTRICTION:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_PROTOCOL_VERSION:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_INSUFFICIENT_SECURITY:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_INTERNAL_ERROR:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_USER_CANCELLED:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_NO_RENEGOTIATION:
|
||
|
|
return -1; /* Don't send it :-) */
|
||
|
|
case SSL_AD_UNSUPPORTED_EXTENSION:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_CERTIFICATE_UNOBTAINABLE:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_UNRECOGNIZED_NAME:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
|
||
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
||
|
|
case SSL_AD_UNKNOWN_PSK_IDENTITY:
|
||
|
|
return TLS1_AD_UNKNOWN_PSK_IDENTITY;
|
||
|
|
case SSL_AD_INAPPROPRIATE_FALLBACK:
|
||
|
|
return TLS1_AD_INAPPROPRIATE_FALLBACK;
|
||
|
|
case SSL_AD_NO_APPLICATION_PROTOCOL:
|
||
|
|
return TLS1_AD_NO_APPLICATION_PROTOCOL;
|
||
|
|
case SSL_AD_CERTIFICATE_REQUIRED:
|
||
|
|
return SSL_AD_HANDSHAKE_FAILURE;
|
||
|
|
case TLS13_AD_MISSING_EXTENSION:
|
||
|
|
return SSL_AD_HANDSHAKE_FAILURE;
|
||
|
|
default:
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|