/src/openssl/ssl/s3_enc.c

Source (jump to first uncovered line)
/*
 * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright 2005 Nokia. All rights reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include "ssl_local.h"
#include <openssl/evp.h>
#include <openssl/md5.h>
#include <openssl/core_names.h>
#include "internal/cryptlib.h"

static int ssl3_generate_key_block(SSL_CONNECTION *s, unsigned char *km, int num)
{
    const EVP_MD *md5 = NULL, *sha1 = NULL;
    EVP_MD_CTX *m5;
    EVP_MD_CTX *s1;
    unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
    unsigned char c = 'A';
    unsigned int i, k;
    int ret = 0;
    SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);

#ifdef CHARSET_EBCDIC
    c = os_toascii[c];          /* 'A' in ASCII */
#endif
    k = 0;
    md5 = ssl_evp_md_fetch(sctx->libctx, NID_md5, sctx->propq);
    sha1 = ssl_evp_md_fetch(sctx->libctx, NID_sha1, sctx->propq);
    m5 = EVP_MD_CTX_new();
    s1 = EVP_MD_CTX_new();
    if (md5 == NULL || sha1 == NULL || m5 == NULL || s1 == NULL) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
        goto err;
    }
    for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
        k++;
        if (k > sizeof(buf)) {
            /* bug: 'buf' is too small for this ciphersuite */
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
            goto err;
        }

        memset(buf, c, k);
        c++;
        if (!EVP_DigestInit_ex(s1, sha1, NULL)
            || !EVP_DigestUpdate(s1, buf, k)
            || !EVP_DigestUpdate(s1, s->session->master_key,
                                 s->session->master_key_length)
            || !EVP_DigestUpdate(s1, s->s3.server_random, SSL3_RANDOM_SIZE)
            || !EVP_DigestUpdate(s1, s->s3.client_random, SSL3_RANDOM_SIZE)
            || !EVP_DigestFinal_ex(s1, smd, NULL)
            || !EVP_DigestInit_ex(m5, md5, NULL)
            || !EVP_DigestUpdate(m5, s->session->master_key,
                                 s->session->master_key_length)
            || !EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH)) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
            goto err;
        }
        if ((int)(i + MD5_DIGEST_LENGTH) > num) {
            if (!EVP_DigestFinal_ex(m5, smd, NULL)) {
                SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
                goto err;
            }
            memcpy(km, smd, (num - i));
        } else {
            if (!EVP_DigestFinal_ex(m5, km, NULL)) {
                SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
                goto err;
            }
        }

        km += MD5_DIGEST_LENGTH;
    }
    OPENSSL_cleanse(smd, sizeof(smd));
    ret = 1;
 err:
    EVP_MD_CTX_free(m5);
    EVP_MD_CTX_free(s1);
    ssl_evp_md_free(md5);
    ssl_evp_md_free(sha1);
    return ret;
}

int ssl3_change_cipher_state(SSL_CONNECTION *s, int which)
{
    unsigned char *p, *mac_secret;
    size_t md_len;
    unsigned char *key, *iv;
    const EVP_CIPHER *ciph;
    const SSL_COMP *comp = NULL;
    const EVP_MD *md;
    int mdi;
    size_t n, iv_len, key_len;
    int direction = (which & SSL3_CC_READ) != 0 ? OSSL_RECORD_DIRECTION_READ
                                                : OSSL_RECORD_DIRECTION_WRITE;

    ciph = s->s3.tmp.new_sym_enc;
    md = s->s3.tmp.new_hash;
    /* m == NULL will lead to a crash later */
    if (!ossl_assert(md != NULL)) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
        goto err;
    }
#ifndef OPENSSL_NO_COMP
    comp = s->s3.tmp.new_compression;
#endif

    p = s->s3.tmp.key_block;
    mdi = EVP_MD_get_size(md);
    if (mdi < 0) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
        goto err;
    }
    md_len = (size_t)mdi;
    key_len = EVP_CIPHER_get_key_length(ciph);
    iv_len = EVP_CIPHER_get_iv_length(ciph);
    if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
        (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
        mac_secret = &(p[0]);
        n = md_len + md_len;
        key = &(p[n]);
        n += key_len + key_len;
        iv = &(p[n]);
        n += iv_len + iv_len;
    } else {
        n = md_len;
        mac_secret = &(p[n]);
        n += md_len + key_len;
        key = &(p[n]);
        n += key_len + iv_len;
        iv = &(p[n]);
        n += iv_len;
    }

    if (n > s->s3.tmp.key_block_length) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
        goto err;
    }

    if (!ssl_set_new_record_layer(s, SSL3_VERSION,
                                  direction,
                                  OSSL_RECORD_PROTECTION_LEVEL_APPLICATION,
                                  NULL, 0, key, key_len, iv, iv_len, mac_secret,
                                  md_len, ciph, 0, NID_undef, md, comp, NULL)) {
        /* SSLfatal already called */
        goto err;
    }

    return 1;
 err:
    return 0;
}

int ssl3_setup_key_block(SSL_CONNECTION *s)
{
    unsigned char *p;
    const EVP_CIPHER *c;
    const EVP_MD *hash;
    int num;
    int ret = 0;
    SSL_COMP *comp;

    if (s->s3.tmp.key_block_length != 0)
        return 1;

    if (!ssl_cipher_get_evp(SSL_CONNECTION_GET_CTX(s), s->session, &c, &hash,
                            NULL, NULL, &comp, 0)) {
        /* Error is already recorded */
        SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR);
        return 0;
    }

    ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
    s->s3.tmp.new_sym_enc = c;
    ssl_evp_md_free(s->s3.tmp.new_hash);
    s->s3.tmp.new_hash = hash;
#ifdef OPENSSL_NO_COMP
    s->s3.tmp.new_compression = NULL;
#else
    s->s3.tmp.new_compression = comp;
#endif

    num = EVP_MD_get_size(hash);
    if (num < 0)
        return 0;

    num = EVP_CIPHER_get_key_length(c) + num + EVP_CIPHER_get_iv_length(c);
    num *= 2;

    ssl3_cleanup_key_block(s);

    if ((p = OPENSSL_malloc(num)) == NULL) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB);
        return 0;
    }

    s->s3.tmp.key_block_length = num;
    s->s3.tmp.key_block = p;

    /* Calls SSLfatal() as required */
    ret = ssl3_generate_key_block(s, p, num);

    return ret;
}

void ssl3_cleanup_key_block(SSL_CONNECTION *s)
{
    OPENSSL_clear_free(s->s3.tmp.key_block, s->s3.tmp.key_block_length);
    s->s3.tmp.key_block = NULL;
    s->s3.tmp.key_block_length = 0;
}

int ssl3_init_finished_mac(SSL_CONNECTION *s)
{
    BIO *buf = BIO_new(BIO_s_mem());

    if (buf == NULL) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BIO_LIB);
        return 0;
    }
    ssl3_free_digest_list(s);
    s->s3.handshake_buffer = buf;
    (void)BIO_set_close(s->s3.handshake_buffer, BIO_CLOSE);
    return 1;
}

/*
 * Free digest list. Also frees handshake buffer since they are always freed
 * together.
 */

void ssl3_free_digest_list(SSL_CONNECTION *s)
{
    BIO_free(s->s3.handshake_buffer);
    s->s3.handshake_buffer = NULL;
    EVP_MD_CTX_free(s->s3.handshake_dgst);
    s->s3.handshake_dgst = NULL;
}

int ssl3_finish_mac(SSL_CONNECTION *s, const unsigned char *buf, size_t len)
{
    int ret;

    if (s->s3.handshake_dgst == NULL) {
        /* Note: this writes to a memory BIO so a failure is a fatal error */
        if (len > INT_MAX) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_OVERFLOW_ERROR);
            return 0;
        }
        ret = BIO_write(s->s3.handshake_buffer, (void *)buf, (int)len);
        if (ret <= 0 || ret != (int)len) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
            return 0;
        }
    } else {
        ret = EVP_DigestUpdate(s->s3.handshake_dgst, buf, len);
        if (!ret) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
            return 0;
        }
    }
    return 1;
}

int ssl3_digest_cached_records(SSL_CONNECTION *s, int keep)
{
    const EVP_MD *md;
    long hdatalen;
    void *hdata;

    if (s->s3.handshake_dgst == NULL) {
        hdatalen = BIO_get_mem_data(s->s3.handshake_buffer, &hdata);
        if (hdatalen <= 0) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_LENGTH);
            return 0;
        }

        s->s3.handshake_dgst = EVP_MD_CTX_new();
        if (s->s3.handshake_dgst == NULL) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
            return 0;
        }

        md = ssl_handshake_md(s);
        if (md == NULL) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR,
                     SSL_R_NO_SUITABLE_DIGEST_ALGORITHM);
            return 0;
        }
        if (!EVP_DigestInit_ex(s->s3.handshake_dgst, md, NULL)
            || !EVP_DigestUpdate(s->s3.handshake_dgst, hdata, hdatalen)) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
            return 0;
        }
    }
    if (keep == 0) {
        BIO_free(s->s3.handshake_buffer);
        s->s3.handshake_buffer = NULL;
    }

    return 1;
}

void ssl3_digest_master_key_set_params(const SSL_SESSION *session,
                                       OSSL_PARAM params[])
{
    int n = 0;
    params[n++] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
                                                    (void *)session->master_key,
                                                    session->master_key_length);
    params[n++] = OSSL_PARAM_construct_end();
}

size_t ssl3_final_finish_mac(SSL_CONNECTION *s, const char *sender, size_t len,
                             unsigned char *p)
{
    int ret;
    EVP_MD_CTX *ctx = NULL;

    if (!ssl3_digest_cached_records(s, 0)) {
        /* SSLfatal() already called */
        return 0;
    }

    if (EVP_MD_CTX_get_type(s->s3.handshake_dgst) != NID_md5_sha1) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_REQUIRED_DIGEST);
        return 0;
    }

    ctx = EVP_MD_CTX_new();
    if (ctx == NULL) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
        return 0;
    }
    if (!EVP_MD_CTX_copy_ex(ctx, s->s3.handshake_dgst)) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
        ret = 0;
        goto err;
    }

    ret = EVP_MD_CTX_get_size(ctx);
    if (ret < 0) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
        ret = 0;
        goto err;
    }

    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;
    }
}

Coverage Report

Created: 2024-05-21 06:52

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
3		* Copyright 2005 Nokia. All rights reserved.
4		*
5		* Licensed under the Apache License 2.0 (the "License"). You may not use
6		* this file except in compliance with the License. You can obtain a copy
7		* in the file LICENSE in the source distribution or at
8		* https://www.openssl.org/source/license.html
9		*/
10
11		#include <stdio.h>
12		#include "ssl_local.h"
13		#include <openssl/evp.h>
14		#include <openssl/md5.h>
15		#include <openssl/core_names.h>
16		#include "internal/cryptlib.h"
17
18		static int ssl3_generate_key_block(SSL_CONNECTION s, unsigned char km, int num)
19	0	{
20	0	const EVP_MD md5 = NULL, sha1 = NULL;
21	0	EVP_MD_CTX *m5;
22	0	EVP_MD_CTX *s1;
23	0	unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
24	0	unsigned char c = 'A';
25	0	unsigned int i, k;
26	0	int ret = 0;
27	0	SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
28
29		#ifdef CHARSET_EBCDIC
30		c = os_toascii[c]; /* 'A' in ASCII */
31		#endif
32	0	k = 0;
33	0	md5 = ssl_evp_md_fetch(sctx->libctx, NID_md5, sctx->propq);
34	0	sha1 = ssl_evp_md_fetch(sctx->libctx, NID_sha1, sctx->propq);
35	0	m5 = EVP_MD_CTX_new();
36	0	s1 = EVP_MD_CTX_new();
37	0	if (md5 == NULL \|\| sha1 == NULL \|\| m5 == NULL \|\| s1 == NULL) {
38	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
39	0	goto err;
40	0	}
41	0	for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
42	0	k++;
43	0	if (k > sizeof(buf)) {
44		/* bug: 'buf' is too small for this ciphersuite */
45	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
46	0	goto err;
47	0	}
48
49	0	memset(buf, c, k);
50	0	c++;
51	0	if (!EVP_DigestInit_ex(s1, sha1, NULL)
52	0	\|\| !EVP_DigestUpdate(s1, buf, k)
53	0	\|\| !EVP_DigestUpdate(s1, s->session->master_key,
54	0	s->session->master_key_length)
55	0	\|\| !EVP_DigestUpdate(s1, s->s3.server_random, SSL3_RANDOM_SIZE)
56	0	\|\| !EVP_DigestUpdate(s1, s->s3.client_random, SSL3_RANDOM_SIZE)
57	0	\|\| !EVP_DigestFinal_ex(s1, smd, NULL)
58	0	\|\| !EVP_DigestInit_ex(m5, md5, NULL)
59	0	\|\| !EVP_DigestUpdate(m5, s->session->master_key,
60	0	s->session->master_key_length)
61	0	\|\| !EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH)) {
62	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
63	0	goto err;
64	0	}
65	0	if ((int)(i + MD5_DIGEST_LENGTH) > num) {
66	0	if (!EVP_DigestFinal_ex(m5, smd, NULL)) {
67	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
68	0	goto err;
69	0	}
70	0	memcpy(km, smd, (num - i));
71	0	} else {
72	0	if (!EVP_DigestFinal_ex(m5, km, NULL)) {
73	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
74	0	goto err;
75	0	}
76	0	}
77
78	0	km += MD5_DIGEST_LENGTH;
79	0	}
80	0	OPENSSL_cleanse(smd, sizeof(smd));
81	0	ret = 1;
82	0	err:
83	0	EVP_MD_CTX_free(m5);
84	0	EVP_MD_CTX_free(s1);
85	0	ssl_evp_md_free(md5);
86	0	ssl_evp_md_free(sha1);
87	0	return ret;
88	0	}
89
90		int ssl3_change_cipher_state(SSL_CONNECTION *s, int which)
91	0	{
92	0	unsigned char p, mac_secret;
93	0	size_t md_len;
94	0	unsigned char key, iv;
95	0	const EVP_CIPHER *ciph;
96	0	const SSL_COMP *comp = NULL;
97	0	const EVP_MD *md;
98	0	int mdi;
99	0	size_t n, iv_len, key_len;
100	0	int direction = (which & SSL3_CC_READ) != 0 ? OSSL_RECORD_DIRECTION_READ
101	0	: OSSL_RECORD_DIRECTION_WRITE;
102
103	0	ciph = s->s3.tmp.new_sym_enc;
104	0	md = s->s3.tmp.new_hash;
105		/* m == NULL will lead to a crash later */
106	0	if (!ossl_assert(md != NULL)) {
107	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
108	0	goto err;
109	0	}
110	0	#ifndef OPENSSL_NO_COMP
111	0	comp = s->s3.tmp.new_compression;
112	0	#endif
113
114	0	p = s->s3.tmp.key_block;
115	0	mdi = EVP_MD_get_size(md);
116	0	if (mdi < 0) {
117	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
118	0	goto err;
119	0	}
120	0	md_len = (size_t)mdi;
121	0	key_len = EVP_CIPHER_get_key_length(ciph);
122	0	iv_len = EVP_CIPHER_get_iv_length(ciph);
123	0	if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) \|\|
124	0	(which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
125	0	mac_secret = &(p[0]);
126	0	n = md_len + md_len;
127	0	key = &(p[n]);
128	0	n += key_len + key_len;
129	0	iv = &(p[n]);
130	0	n += iv_len + iv_len;
131	0	} else {
132	0	n = md_len;
133	0	mac_secret = &(p[n]);
134	0	n += md_len + key_len;
135	0	key = &(p[n]);
136	0	n += key_len + iv_len;
137	0	iv = &(p[n]);
138	0	n += iv_len;
139	0	}
140
141	0	if (n > s->s3.tmp.key_block_length) {
142	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
143	0	goto err;
144	0	}
145
146	0	if (!ssl_set_new_record_layer(s, SSL3_VERSION,
147	0	direction,
148	0	OSSL_RECORD_PROTECTION_LEVEL_APPLICATION,
149	0	NULL, 0, key, key_len, iv, iv_len, mac_secret,
150	0	md_len, ciph, 0, NID_undef, md, comp, NULL)) {
151		/* SSLfatal already called */
152	0	goto err;
153	0	}
154
155	0	return 1;
156	0	err:
157	0	return 0;
158	0	}
159
160		int ssl3_setup_key_block(SSL_CONNECTION *s)
161	0	{
162	0	unsigned char *p;
163	0	const EVP_CIPHER *c;
164	0	const EVP_MD *hash;
165	0	int num;
166	0	int ret = 0;
167	0	SSL_COMP *comp;
168
169	0	if (s->s3.tmp.key_block_length != 0)
170	0	return 1;
171
172	0	if (!ssl_cipher_get_evp(SSL_CONNECTION_GET_CTX(s), s->session, &c, &hash,
173	0	NULL, NULL, &comp, 0)) {
174		/* Error is already recorded */
175	0	SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR);
176	0	return 0;
177	0	}
178
179	0	ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
180	0	s->s3.tmp.new_sym_enc = c;
181	0	ssl_evp_md_free(s->s3.tmp.new_hash);
182	0	s->s3.tmp.new_hash = hash;
183		#ifdef OPENSSL_NO_COMP
184		s->s3.tmp.new_compression = NULL;
185		#else
186	0	s->s3.tmp.new_compression = comp;
187	0	#endif
188
189	0	num = EVP_MD_get_size(hash);
190	0	if (num < 0)
191	0	return 0;
192
193	0	num = EVP_CIPHER_get_key_length(c) + num + EVP_CIPHER_get_iv_length(c);
194	0	num *= 2;
195
196	0	ssl3_cleanup_key_block(s);
197
198	0	if ((p = OPENSSL_malloc(num)) == NULL) {
199	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB);
200	0	return 0;
201	0	}
202
203	0	s->s3.tmp.key_block_length = num;
204	0	s->s3.tmp.key_block = p;
205
206		/* Calls SSLfatal() as required */
207	0	ret = ssl3_generate_key_block(s, p, num);
208
209	0	return ret;
210	0	}
211
212		void ssl3_cleanup_key_block(SSL_CONNECTION *s)
213	6.82k	{
214	6.82k	OPENSSL_clear_free(s->s3.tmp.key_block, s->s3.tmp.key_block_length);
215	6.82k	s->s3.tmp.key_block = NULL;
216	6.82k	s->s3.tmp.key_block_length = 0;
217	6.82k	}
218
219		int ssl3_init_finished_mac(SSL_CONNECTION *s)
220	1.36k	{
221	1.36k	BIO *buf = BIO_new(BIO_s_mem());
222
223	1.36k	if (buf == NULL) {
224	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BIO_LIB);
225	0	return 0;
226	0	}
227	1.36k	ssl3_free_digest_list(s);
228	1.36k	s->s3.handshake_buffer = buf;
229	1.36k	(void)BIO_set_close(s->s3.handshake_buffer, BIO_CLOSE);
230	1.36k	return 1;
231	1.36k	}
232
233		/*
234		* Free digest list. Also frees handshake buffer since they are always freed
235		* together.
236		*/
237
238		void ssl3_free_digest_list(SSL_CONNECTION *s)
239	8.19k	{
240	8.19k	BIO_free(s->s3.handshake_buffer);
241	8.19k	s->s3.handshake_buffer = NULL;
242	8.19k	EVP_MD_CTX_free(s->s3.handshake_dgst);
243	8.19k	s->s3.handshake_dgst = NULL;
244	8.19k	}
245
246		int ssl3_finish_mac(SSL_CONNECTION s, const unsigned char buf, size_t len)
247	1.36k	{
248	1.36k	int ret;
249
250	1.36k	if (s->s3.handshake_dgst == NULL) {
251		/* Note: this writes to a memory BIO so a failure is a fatal error */
252	1.36k	if (len > INT_MAX) {
253	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_OVERFLOW_ERROR);
254	0	return 0;
255	0	}
256	1.36k	ret = BIO_write(s->s3.handshake_buffer, (void *)buf, (int)len);
257	1.36k	if (ret <= 0 \|\| ret != (int)len) {
258	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
259	0	return 0;
260	0	}
261	1.36k	} else {
262	0	ret = EVP_DigestUpdate(s->s3.handshake_dgst, buf, len);
263	0	if (!ret) {
264	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
265	0	return 0;
266	0	}
267	0	}
268	1.36k	return 1;
269	1.36k	}
270
271		int ssl3_digest_cached_records(SSL_CONNECTION *s, int keep)
272	0	{
273	0	const EVP_MD *md;
274	0	long hdatalen;
275	0	void *hdata;
276
277	0	if (s->s3.handshake_dgst == NULL) {
278	0	hdatalen = BIO_get_mem_data(s->s3.handshake_buffer, &hdata);
279	0	if (hdatalen <= 0) {
280	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_LENGTH);
281	0	return 0;
282	0	}
283
284	0	s->s3.handshake_dgst = EVP_MD_CTX_new();
285	0	if (s->s3.handshake_dgst == NULL) {
286	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
287	0	return 0;
288	0	}
289
290	0	md = ssl_handshake_md(s);
291	0	if (md == NULL) {
292	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR,
293	0	SSL_R_NO_SUITABLE_DIGEST_ALGORITHM);
294	0	return 0;
295	0	}
296	0	if (!EVP_DigestInit_ex(s->s3.handshake_dgst, md, NULL)
297	0	\|\| !EVP_DigestUpdate(s->s3.handshake_dgst, hdata, hdatalen)) {
298	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
299	0	return 0;
300	0	}
301	0	}
302	0	if (keep == 0) {
303	0	BIO_free(s->s3.handshake_buffer);
304	0	s->s3.handshake_buffer = NULL;
305	0	}
306
307	0	return 1;
308	0	}
309
310		void ssl3_digest_master_key_set_params(const SSL_SESSION *session,
311		OSSL_PARAM params[])
312	0	{
313	0	int n = 0;
314	0	params[n++] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
315	0	(void *)session->master_key,
316	0	session->master_key_length);
317	0	params[n++] = OSSL_PARAM_construct_end();
318	0	}
319
320		size_t ssl3_final_finish_mac(SSL_CONNECTION s, const char sender, size_t len,
321		unsigned char *p)
322	0	{
323	0	int ret;
324	0	EVP_MD_CTX *ctx = NULL;
325
326	0	if (!ssl3_digest_cached_records(s, 0)) {
327		/* SSLfatal() already called */
328	0	return 0;
329	0	}
330
331	0	if (EVP_MD_CTX_get_type(s->s3.handshake_dgst) != NID_md5_sha1) {
332	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_REQUIRED_DIGEST);
333	0	return 0;
334	0	}
335
336	0	ctx = EVP_MD_CTX_new();
337	0	if (ctx == NULL) {
338	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
339	0	return 0;
340	0	}
341	0	if (!EVP_MD_CTX_copy_ex(ctx, s->s3.handshake_dgst)) {
342	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
343	0	ret = 0;
344	0	goto err;
345	0	}
346
347	0	ret = EVP_MD_CTX_get_size(ctx);
348	0	if (ret < 0) {
349	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
350	0	ret = 0;
351	0	goto err;
352	0	}
353
354	0	if (sender != NULL) {
355	0	OSSL_PARAM digest_cmd_params[3];
356
357	0	ssl3_digest_master_key_set_params(s->session, digest_cmd_params);
358
359	0	if (EVP_DigestUpdate(ctx, sender, len) <= 0
360	0	\|\| EVP_MD_CTX_set_params(ctx, digest_cmd_params) <= 0
361	0	\|\| EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
362	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
363	0	ret = 0;
364	0	}
365	0	}
366
367	0	err:
368	0	EVP_MD_CTX_free(ctx);
369
370	0	return ret;
371	0	}
372
373		int ssl3_generate_master_secret(SSL_CONNECTION s, unsigned char out,
374		unsigned char *p,
375		size_t len, size_t *secret_size)
376	0	{
377	0	static const unsigned char *salt[3] = {
378	0	#ifndef CHARSET_EBCDIC
379	0	(const unsigned char *)"A",
380	0	(const unsigned char *)"BB",
381	0	(const unsigned char *)"CCC",
382		#else
383		(const unsigned char *)"\x41",
384		(const unsigned char *)"\x42\x42",
385		(const unsigned char *)"\x43\x43\x43",
386		#endif
387	0	};
388	0	unsigned char buf[EVP_MAX_MD_SIZE];
389	0	EVP_MD_CTX *ctx = EVP_MD_CTX_new();
390	0	int i, ret = 1;
391	0	unsigned int n;
392	0	size_t ret_secret_size = 0;
393
394	0	if (ctx == NULL) {
395	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
396	0	return 0;
397	0	}
398	0	for (i = 0; i < 3; i++) {
399	0	if (EVP_DigestInit_ex(ctx, SSL_CONNECTION_GET_CTX(s)->sha1, NULL) <= 0
400	0	\|\| EVP_DigestUpdate(ctx, salt[i],
401	0	strlen((const char *)salt[i])) <= 0
402	0	\|\| EVP_DigestUpdate(ctx, p, len) <= 0
403	0	\|\| EVP_DigestUpdate(ctx, &(s->s3.client_random[0]),
404	0	SSL3_RANDOM_SIZE) <= 0
405	0	\|\| EVP_DigestUpdate(ctx, &(s->s3.server_random[0]),
406	0	SSL3_RANDOM_SIZE) <= 0
407	0	\|\| EVP_DigestFinal_ex(ctx, buf, &n) <= 0
408	0	\|\| EVP_DigestInit_ex(ctx, SSL_CONNECTION_GET_CTX(s)->md5, NULL) <= 0
409	0	\|\| EVP_DigestUpdate(ctx, p, len) <= 0
410	0	\|\| EVP_DigestUpdate(ctx, buf, n) <= 0
411	0	\|\| EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
412	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
413	0	ret = 0;
414	0	break;
415	0	}
416	0	out += n;
417	0	ret_secret_size += n;
418	0	}
419	0	EVP_MD_CTX_free(ctx);
420
421	0	OPENSSL_cleanse(buf, sizeof(buf));
422	0	if (ret)
423	0	*secret_size = ret_secret_size;
424	0	return ret;
425	0	}
426
427		int ssl3_alert_code(int code)
428	0	{
429	0	switch (code) {
430	0	case SSL_AD_CLOSE_NOTIFY:
431	0	return SSL3_AD_CLOSE_NOTIFY;
432	0	case SSL_AD_UNEXPECTED_MESSAGE:
433	0	return SSL3_AD_UNEXPECTED_MESSAGE;
434	0	case SSL_AD_BAD_RECORD_MAC:
435	0	return SSL3_AD_BAD_RECORD_MAC;
436	0	case SSL_AD_DECRYPTION_FAILED:
437	0	return SSL3_AD_BAD_RECORD_MAC;
438	0	case SSL_AD_RECORD_OVERFLOW:
439	0	return SSL3_AD_BAD_RECORD_MAC;
440	0	case SSL_AD_DECOMPRESSION_FAILURE:
441	0	return SSL3_AD_DECOMPRESSION_FAILURE;
442	0	case SSL_AD_HANDSHAKE_FAILURE:
443	0	return SSL3_AD_HANDSHAKE_FAILURE;
444	0	case SSL_AD_NO_CERTIFICATE:
445	0	return SSL3_AD_NO_CERTIFICATE;
446	0	case SSL_AD_BAD_CERTIFICATE:
447	0	return SSL3_AD_BAD_CERTIFICATE;
448	0	case SSL_AD_UNSUPPORTED_CERTIFICATE:
449	0	return SSL3_AD_UNSUPPORTED_CERTIFICATE;
450	0	case SSL_AD_CERTIFICATE_REVOKED:
451	0	return SSL3_AD_CERTIFICATE_REVOKED;
452	0	case SSL_AD_CERTIFICATE_EXPIRED:
453	0	return SSL3_AD_CERTIFICATE_EXPIRED;
454	0	case SSL_AD_CERTIFICATE_UNKNOWN:
455	0	return SSL3_AD_CERTIFICATE_UNKNOWN;
456	0	case SSL_AD_ILLEGAL_PARAMETER:
457	0	return SSL3_AD_ILLEGAL_PARAMETER;
458	0	case SSL_AD_UNKNOWN_CA:
459	0	return SSL3_AD_BAD_CERTIFICATE;
460	0	case SSL_AD_ACCESS_DENIED:
461	0	return SSL3_AD_HANDSHAKE_FAILURE;
462	0	case SSL_AD_DECODE_ERROR:
463	0	return SSL3_AD_HANDSHAKE_FAILURE;
464	0	case SSL_AD_DECRYPT_ERROR:
465	0	return SSL3_AD_HANDSHAKE_FAILURE;
466	0	case SSL_AD_EXPORT_RESTRICTION:
467	0	return SSL3_AD_HANDSHAKE_FAILURE;
468	0	case SSL_AD_PROTOCOL_VERSION:
469	0	return SSL3_AD_HANDSHAKE_FAILURE;
470	0	case SSL_AD_INSUFFICIENT_SECURITY:
471	0	return SSL3_AD_HANDSHAKE_FAILURE;
472	0	case SSL_AD_INTERNAL_ERROR:
473	0	return SSL3_AD_HANDSHAKE_FAILURE;
474	0	case SSL_AD_USER_CANCELLED:
475	0	return SSL3_AD_HANDSHAKE_FAILURE;
476	0	case SSL_AD_NO_RENEGOTIATION:
477	0	return -1; /* Don't send it :-) */
478	0	case SSL_AD_UNSUPPORTED_EXTENSION:
479	0	return SSL3_AD_HANDSHAKE_FAILURE;
480	0	case SSL_AD_CERTIFICATE_UNOBTAINABLE:
481	0	return SSL3_AD_HANDSHAKE_FAILURE;
482	0	case SSL_AD_UNRECOGNIZED_NAME:
483	0	return SSL3_AD_HANDSHAKE_FAILURE;
484	0	case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
485	0	return SSL3_AD_HANDSHAKE_FAILURE;
486	0	case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
487	0	return SSL3_AD_HANDSHAKE_FAILURE;
488	0	case SSL_AD_UNKNOWN_PSK_IDENTITY:
489	0	return TLS1_AD_UNKNOWN_PSK_IDENTITY;
490	0	case SSL_AD_INAPPROPRIATE_FALLBACK:
491	0	return TLS1_AD_INAPPROPRIATE_FALLBACK;
492	0	case SSL_AD_NO_APPLICATION_PROTOCOL:
493	0	return TLS1_AD_NO_APPLICATION_PROTOCOL;
494	0	case SSL_AD_CERTIFICATE_REQUIRED:
495	0	return SSL_AD_HANDSHAKE_FAILURE;
496	0	case TLS13_AD_MISSING_EXTENSION:
497	0	return SSL_AD_HANDSHAKE_FAILURE;
498	0	default:
499	0	return -1;
500	0	}
501	0	}