/src/openssl35/ssl/s3_enc.c

Source (jump to first uncovered line)
/*
 * Copyright 1995-2025 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"
#include "internal/ssl_unwrap.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 *const 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: 2025-08-28 07:07

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1995-2025 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		#include "internal/ssl_unwrap.h"
18
19		static int ssl3_generate_key_block(SSL_CONNECTION s, unsigned char km, int num)
20	1.85k	{
21	1.85k	const EVP_MD md5 = NULL, sha1 = NULL;
22	1.85k	EVP_MD_CTX *m5;
23	1.85k	EVP_MD_CTX *s1;
24	1.85k	unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
25	1.85k	unsigned char c = 'A';
26	1.85k	unsigned int i, k;
27	1.85k	int ret = 0;
28	1.85k	SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
29
30		#ifdef CHARSET_EBCDIC
31		c = os_toascii[c]; /* 'A' in ASCII */
32		#endif
33	1.85k	k = 0;
34	1.85k	md5 = ssl_evp_md_fetch(sctx->libctx, NID_md5, sctx->propq);
35	1.85k	sha1 = ssl_evp_md_fetch(sctx->libctx, NID_sha1, sctx->propq);
36	1.85k	m5 = EVP_MD_CTX_new();
37	1.85k	s1 = EVP_MD_CTX_new();
38	1.85k	if (md5 == NULL \|\| sha1 == NULL \|\| m5 == NULL \|\| s1 == NULL) {
39	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
40	0	goto err;
41	0	}
42	10.7k	for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
43	8.86k	k++;
44	8.86k	if (k > sizeof(buf)) {
45		/* bug: 'buf' is too small for this ciphersuite */
46	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
47	0	goto err;
48	0	}
49
50	8.86k	memset(buf, c, k);
51	8.86k	c++;
52	8.86k	if (!EVP_DigestInit_ex(s1, sha1, NULL)
53	8.86k	\|\| !EVP_DigestUpdate(s1, buf, k)
54	8.86k	\|\| !EVP_DigestUpdate(s1, s->session->master_key,
55	8.86k	s->session->master_key_length)
56	8.86k	\|\| !EVP_DigestUpdate(s1, s->s3.server_random, SSL3_RANDOM_SIZE)
57	8.86k	\|\| !EVP_DigestUpdate(s1, s->s3.client_random, SSL3_RANDOM_SIZE)
58	8.86k	\|\| !EVP_DigestFinal_ex(s1, smd, NULL)
59	8.86k	\|\| !EVP_DigestInit_ex(m5, md5, NULL)
60	8.86k	\|\| !EVP_DigestUpdate(m5, s->session->master_key,
61	8.86k	s->session->master_key_length)
62	8.86k	\|\| !EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH)) {
63	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
64	0	goto err;
65	0	}
66	8.86k	if ((int)(i + MD5_DIGEST_LENGTH) > num) {
67	1.52k	if (!EVP_DigestFinal_ex(m5, smd, NULL)) {
68	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
69	0	goto err;
70	0	}
71	1.52k	memcpy(km, smd, (num - i));
72	7.33k	} else {
73	7.33k	if (!EVP_DigestFinal_ex(m5, km, NULL)) {
74	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
75	0	goto err;
76	0	}
77	7.33k	}
78
79	8.86k	km += MD5_DIGEST_LENGTH;
80	8.86k	}
81	1.85k	OPENSSL_cleanse(smd, sizeof(smd));
82	1.85k	ret = 1;
83	1.85k	err:
84	1.85k	EVP_MD_CTX_free(m5);
85	1.85k	EVP_MD_CTX_free(s1);
86	1.85k	ssl_evp_md_free(md5);
87	1.85k	ssl_evp_md_free(sha1);
88	1.85k	return ret;
89	1.85k	}
90
91		int ssl3_change_cipher_state(SSL_CONNECTION *s, int which)
92	1.48k	{
93	1.48k	unsigned char p, mac_secret;
94	1.48k	size_t md_len;
95	1.48k	unsigned char key, iv;
96	1.48k	const EVP_CIPHER *ciph;
97	1.48k	const SSL_COMP *comp = NULL;
98	1.48k	const EVP_MD *md;
99	1.48k	int mdi;
100	1.48k	size_t n, iv_len, key_len;
101	1.48k	int direction = (which & SSL3_CC_READ) != 0 ? OSSL_RECORD_DIRECTION_READ
102	1.48k	: OSSL_RECORD_DIRECTION_WRITE;
103
104	1.48k	ciph = s->s3.tmp.new_sym_enc;
105	1.48k	md = s->s3.tmp.new_hash;
106		/* m == NULL will lead to a crash later */
107	1.48k	if (!ossl_assert(md != NULL)) {
108	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
109	0	goto err;
110	0	}
111	1.48k	#ifndef OPENSSL_NO_COMP
112	1.48k	comp = s->s3.tmp.new_compression;
113	1.48k	#endif
114
115	1.48k	p = s->s3.tmp.key_block;
116	1.48k	mdi = EVP_MD_get_size(md);
117	1.48k	if (mdi <= 0) {
118	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
119	0	goto err;
120	0	}
121	1.48k	md_len = (size_t)mdi;
122	1.48k	key_len = EVP_CIPHER_get_key_length(ciph);
123	1.48k	iv_len = EVP_CIPHER_get_iv_length(ciph);
124
125	1.48k	if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) \|\|
126	1.48k	(which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
127	850	mac_secret = &(p[0]);
128	850	n = md_len + md_len;
129	850	key = &(p[n]);
130	850	n += key_len + key_len;
131	850	iv = &(p[n]);
132	850	n += iv_len + iv_len;
133	850	} else {
134	630	n = md_len;
135	630	mac_secret = &(p[n]);
136	630	n += md_len + key_len;
137	630	key = &(p[n]);
138	630	n += key_len + iv_len;
139	630	iv = &(p[n]);
140	630	n += iv_len;
141	630	}
142
143	1.48k	if (n > s->s3.tmp.key_block_length) {
144	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
145	0	goto err;
146	0	}
147
148	1.48k	if (!ssl_set_new_record_layer(s, SSL3_VERSION,
149	1.48k	direction,
150	1.48k	OSSL_RECORD_PROTECTION_LEVEL_APPLICATION,
151	1.48k	NULL, 0, key, key_len, iv, iv_len, mac_secret,
152	1.48k	md_len, ciph, 0, NID_undef, md, comp, NULL)) {
153		/* SSLfatal already called */
154	0	goto err;
155	0	}
156
157	1.48k	return 1;
158	0	err:
159	0	return 0;
160	1.48k	}
161
162		int ssl3_setup_key_block(SSL_CONNECTION *s)
163	850	{
164	850	unsigned char *p;
165	850	const EVP_CIPHER *c;
166	850	const EVP_MD *hash;
167	850	int num;
168	850	int ret = 0;
169	850	SSL_COMP *comp;
170
171	850	if (s->s3.tmp.key_block_length != 0)
172	0	return 1;
173
174	850	if (!ssl_cipher_get_evp(SSL_CONNECTION_GET_CTX(s), s->session, &c, &hash,
175	850	NULL, NULL, &comp, 0)) {
176		/* Error is already recorded */
177	0	SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR);
178	0	return 0;
179	0	}
180
181	850	ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
182	850	s->s3.tmp.new_sym_enc = c;
183	850	ssl_evp_md_free(s->s3.tmp.new_hash);
184	850	s->s3.tmp.new_hash = hash;
185		#ifdef OPENSSL_NO_COMP
186		s->s3.tmp.new_compression = NULL;
187		#else
188	850	s->s3.tmp.new_compression = comp;
189	850	#endif
190
191	850	num = EVP_MD_get_size(hash);
192	850	if (num <= 0)
193	0	return 0;
194
195	850	num = EVP_CIPHER_get_key_length(c) + num + EVP_CIPHER_get_iv_length(c);
196	850	num *= 2;
197
198	850	ssl3_cleanup_key_block(s);
199
200	850	if ((p = OPENSSL_malloc(num)) == NULL) {
201	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB);
202	0	return 0;
203	0	}
204
205	850	s->s3.tmp.key_block_length = num;
206	850	s->s3.tmp.key_block = p;
207
208		/* Calls SSLfatal() as required */
209	850	ret = ssl3_generate_key_block(s, p, num);
210
211	850	return ret;
212	850	}
213
214		void ssl3_cleanup_key_block(SSL_CONNECTION *s)
215	768k	{
216	768k	OPENSSL_clear_free(s->s3.tmp.key_block, s->s3.tmp.key_block_length);
217	768k	s->s3.tmp.key_block = NULL;
218	768k	s->s3.tmp.key_block_length = 0;
219	768k	}
220
221		int ssl3_init_finished_mac(SSL_CONNECTION *s)
222	228k	{
223	228k	BIO *buf = BIO_new(BIO_s_mem());
224
225	228k	if (buf == NULL) {
226	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_BIO_LIB);
227	0	return 0;
228	0	}
229	228k	ssl3_free_digest_list(s);
230	228k	s->s3.handshake_buffer = buf;
231	228k	(void)BIO_set_close(s->s3.handshake_buffer, BIO_CLOSE);
232	228k	return 1;
233	228k	}
234
235		/*
236		* Free digest list. Also frees handshake buffer since they are always freed
237		* together.
238		*/
239
240		void ssl3_free_digest_list(SSL_CONNECTION *s)
241	961k	{
242	961k	BIO_free(s->s3.handshake_buffer);
243	961k	s->s3.handshake_buffer = NULL;
244	961k	EVP_MD_CTX_free(s->s3.handshake_dgst);
245	961k	s->s3.handshake_dgst = NULL;
246	961k	}
247
248		int ssl3_finish_mac(SSL_CONNECTION s, const unsigned char buf, size_t len)
249	603k	{
250	603k	int ret;
251
252	603k	if (s->s3.handshake_dgst == NULL) {
253		/* Note: this writes to a memory BIO so a failure is a fatal error */
254	372k	if (len > INT_MAX) {
255	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_OVERFLOW_ERROR);
256	0	return 0;
257	0	}
258	372k	ret = BIO_write(s->s3.handshake_buffer, (void *)buf, (int)len);
259	372k	if (ret <= 0 \|\| ret != (int)len) {
260	7	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
261	7	return 0;
262	7	}
263	372k	} else {
264	231k	ret = EVP_DigestUpdate(s->s3.handshake_dgst, buf, len);
265	231k	if (!ret) {
266	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
267	0	return 0;
268	0	}
269	231k	}
270	603k	return 1;
271	603k	}
272
273		int ssl3_digest_cached_records(SSL_CONNECTION *s, int keep)
274	190k	{
275	190k	const EVP_MD *md;
276	190k	long hdatalen;
277	190k	void *hdata;
278
279	190k	if (s->s3.handshake_dgst == NULL) {
280	60.1k	hdatalen = BIO_get_mem_data(s->s3.handshake_buffer, &hdata);
281	60.1k	if (hdatalen <= 0) {
282	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_BAD_HANDSHAKE_LENGTH);
283	0	return 0;
284	0	}
285
286	60.1k	s->s3.handshake_dgst = EVP_MD_CTX_new();
287	60.1k	if (s->s3.handshake_dgst == NULL) {
288	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
289	0	return 0;
290	0	}
291
292	60.1k	md = ssl_handshake_md(s);
293	60.1k	if (md == NULL) {
294	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR,
295	0	SSL_R_NO_SUITABLE_DIGEST_ALGORITHM);
296	0	return 0;
297	0	}
298	60.1k	if (!EVP_DigestInit_ex(s->s3.handshake_dgst, md, NULL)
299	60.1k	\|\| !EVP_DigestUpdate(s->s3.handshake_dgst, hdata, hdatalen)) {
300	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
301	0	return 0;
302	0	}
303	60.1k	}
304	190k	if (keep == 0) {
305	80.0k	BIO_free(s->s3.handshake_buffer);
306	80.0k	s->s3.handshake_buffer = NULL;
307	80.0k	}
308
309	190k	return 1;
310	190k	}
311
312		void ssl3_digest_master_key_set_params(const SSL_SESSION *session,
313		OSSL_PARAM params[])
314	1.96k	{
315	1.96k	int n = 0;
316	1.96k	params[n++] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
317	1.96k	(void *)session->master_key,
318	1.96k	session->master_key_length);
319	1.96k	params[n++] = OSSL_PARAM_construct_end();
320	1.96k	}
321
322		size_t ssl3_final_finish_mac(SSL_CONNECTION s, const char sender, size_t len,
323		unsigned char *p)
324	1.96k	{
325	1.96k	int ret;
326	1.96k	EVP_MD_CTX *ctx = NULL;
327
328	1.96k	if (!ssl3_digest_cached_records(s, 0)) {
329		/* SSLfatal() already called */
330	0	return 0;
331	0	}
332
333	1.96k	if (EVP_MD_CTX_get_type(s->s3.handshake_dgst) != NID_md5_sha1) {
334	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_NO_REQUIRED_DIGEST);
335	0	return 0;
336	0	}
337
338	1.96k	ctx = EVP_MD_CTX_new();
339	1.96k	if (ctx == NULL) {
340	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
341	0	return 0;
342	0	}
343	1.96k	if (!EVP_MD_CTX_copy_ex(ctx, s->s3.handshake_dgst)) {
344	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
345	0	ret = 0;
346	0	goto err;
347	0	}
348
349	1.96k	ret = EVP_MD_CTX_get_size(ctx);
350	1.96k	if (ret < 0) {
351	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
352	0	ret = 0;
353	0	goto err;
354	0	}
355
356	1.96k	if (sender != NULL) {
357	1.96k	OSSL_PARAM digest_cmd_params[3];
358
359	1.96k	ssl3_digest_master_key_set_params(s->session, digest_cmd_params);
360
361	1.96k	if (EVP_DigestUpdate(ctx, sender, len) <= 0
362	1.96k	\|\| EVP_MD_CTX_set_params(ctx, digest_cmd_params) <= 0
363	1.96k	\|\| EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
364	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
365	0	ret = 0;
366	0	}
367	1.96k	}
368
369	1.96k	err:
370	1.96k	EVP_MD_CTX_free(ctx);
371
372	1.96k	return ret;
373	1.96k	}
374
375		int ssl3_generate_master_secret(SSL_CONNECTION s, unsigned char out,
376		unsigned char *p,
377		size_t len, size_t *secret_size)
378	4.51k	{
379	4.51k	static const unsigned char *const salt[3] = {
380	4.51k	#ifndef CHARSET_EBCDIC
381	4.51k	(const unsigned char *)"A",
382	4.51k	(const unsigned char *)"BB",
383	4.51k	(const unsigned char *)"CCC",
384		#else
385		(const unsigned char *)"\x41",
386		(const unsigned char *)"\x42\x42",
387		(const unsigned char *)"\x43\x43\x43",
388		#endif
389	4.51k	};
390	4.51k	unsigned char buf[EVP_MAX_MD_SIZE];
391	4.51k	EVP_MD_CTX *ctx = EVP_MD_CTX_new();
392	4.51k	int i, ret = 1;
393	4.51k	unsigned int n;
394	4.51k	size_t ret_secret_size = 0;
395
396	4.51k	if (ctx == NULL) {
397	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
398	0	return 0;
399	0	}
400	18.0k	for (i = 0; i < 3; i++) {
401	13.5k	if (EVP_DigestInit_ex(ctx, SSL_CONNECTION_GET_CTX(s)->sha1, NULL) <= 0
402	13.5k	\|\| EVP_DigestUpdate(ctx, salt[i],
403	13.5k	strlen((const char *)salt[i])) <= 0
404	13.5k	\|\| EVP_DigestUpdate(ctx, p, len) <= 0
405	13.5k	\|\| EVP_DigestUpdate(ctx, &(s->s3.client_random[0]),
406	13.5k	SSL3_RANDOM_SIZE) <= 0
407	13.5k	\|\| EVP_DigestUpdate(ctx, &(s->s3.server_random[0]),
408	13.5k	SSL3_RANDOM_SIZE) <= 0
409	13.5k	\|\| EVP_DigestFinal_ex(ctx, buf, &n) <= 0
410	13.5k	\|\| EVP_DigestInit_ex(ctx, SSL_CONNECTION_GET_CTX(s)->md5, NULL) <= 0
411	13.5k	\|\| EVP_DigestUpdate(ctx, p, len) <= 0
412	13.5k	\|\| EVP_DigestUpdate(ctx, buf, n) <= 0
413	13.5k	\|\| EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
414	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
415	0	ret = 0;
416	0	break;
417	0	}
418	13.5k	out += n;
419	13.5k	ret_secret_size += n;
420	13.5k	}
421	4.51k	EVP_MD_CTX_free(ctx);
422
423	4.51k	OPENSSL_cleanse(buf, sizeof(buf));
424	4.51k	if (ret)
425	4.51k	*secret_size = ret_secret_size;
426	4.51k	return ret;
427	4.51k	}
428
429		int ssl3_alert_code(int code)
430	7.07k	{
431	7.07k	switch (code) {
432	0	case SSL_AD_CLOSE_NOTIFY:
433	0	return SSL3_AD_CLOSE_NOTIFY;
434	1.04k	case SSL_AD_UNEXPECTED_MESSAGE:
435	1.04k	return SSL3_AD_UNEXPECTED_MESSAGE;
436	410	case SSL_AD_BAD_RECORD_MAC:
437	410	return SSL3_AD_BAD_RECORD_MAC;
438	0	case SSL_AD_DECRYPTION_FAILED:
439	0	return SSL3_AD_BAD_RECORD_MAC;
440	165	case SSL_AD_RECORD_OVERFLOW:
441	165	return SSL3_AD_BAD_RECORD_MAC;
442	0	case SSL_AD_DECOMPRESSION_FAILURE:
443	0	return SSL3_AD_DECOMPRESSION_FAILURE;
444	209	case SSL_AD_HANDSHAKE_FAILURE:
445	209	return SSL3_AD_HANDSHAKE_FAILURE;
446	126	case SSL_AD_NO_CERTIFICATE:
447	126	return SSL3_AD_NO_CERTIFICATE;
448	748	case SSL_AD_BAD_CERTIFICATE:
449	748	return SSL3_AD_BAD_CERTIFICATE;
450	0	case SSL_AD_UNSUPPORTED_CERTIFICATE:
451	0	return SSL3_AD_UNSUPPORTED_CERTIFICATE;
452	0	case SSL_AD_CERTIFICATE_REVOKED:
453	0	return SSL3_AD_CERTIFICATE_REVOKED;
454	0	case SSL_AD_CERTIFICATE_EXPIRED:
455	0	return SSL3_AD_CERTIFICATE_EXPIRED;
456	0	case SSL_AD_CERTIFICATE_UNKNOWN:
457	0	return SSL3_AD_CERTIFICATE_UNKNOWN;
458	1.18k	case SSL_AD_ILLEGAL_PARAMETER:
459	1.18k	return SSL3_AD_ILLEGAL_PARAMETER;
460	0	case SSL_AD_UNKNOWN_CA:
461	0	return SSL3_AD_BAD_CERTIFICATE;
462	0	case SSL_AD_ACCESS_DENIED:
463	0	return SSL3_AD_HANDSHAKE_FAILURE;
464	2.11k	case SSL_AD_DECODE_ERROR:
465	2.11k	return SSL3_AD_HANDSHAKE_FAILURE;
466	256	case SSL_AD_DECRYPT_ERROR:
467	256	return SSL3_AD_HANDSHAKE_FAILURE;
468	0	case SSL_AD_EXPORT_RESTRICTION:
469	0	return SSL3_AD_HANDSHAKE_FAILURE;
470	549	case SSL_AD_PROTOCOL_VERSION:
471	549	return SSL3_AD_HANDSHAKE_FAILURE;
472	0	case SSL_AD_INSUFFICIENT_SECURITY:
473	0	return SSL3_AD_HANDSHAKE_FAILURE;
474	255	case SSL_AD_INTERNAL_ERROR:
475	255	return SSL3_AD_HANDSHAKE_FAILURE;
476	0	case SSL_AD_USER_CANCELLED:
477	0	return SSL3_AD_HANDSHAKE_FAILURE;
478	0	case SSL_AD_NO_RENEGOTIATION:
479	0	return -1; /* Don't send it :-) */
480	5	case SSL_AD_UNSUPPORTED_EXTENSION:
481	5	return SSL3_AD_HANDSHAKE_FAILURE;
482	0	case SSL_AD_CERTIFICATE_UNOBTAINABLE:
483	0	return SSL3_AD_HANDSHAKE_FAILURE;
484	0	case SSL_AD_UNRECOGNIZED_NAME:
485	0	return SSL3_AD_HANDSHAKE_FAILURE;
486	0	case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
487	0	return SSL3_AD_HANDSHAKE_FAILURE;
488	0	case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
489	0	return SSL3_AD_HANDSHAKE_FAILURE;
490	0	case SSL_AD_UNKNOWN_PSK_IDENTITY:
491	0	return TLS1_AD_UNKNOWN_PSK_IDENTITY;
492	6	case SSL_AD_INAPPROPRIATE_FALLBACK:
493	6	return TLS1_AD_INAPPROPRIATE_FALLBACK;
494	0	case SSL_AD_NO_APPLICATION_PROTOCOL:
495	0	return TLS1_AD_NO_APPLICATION_PROTOCOL;
496	0	case SSL_AD_CERTIFICATE_REQUIRED:
497	0	return SSL_AD_HANDSHAKE_FAILURE;
498	6	case TLS13_AD_MISSING_EXTENSION:
499	6	return SSL_AD_HANDSHAKE_FAILURE;
500	0	default:
501	0	return -1;
502	7.07k	}
503	7.07k	}