/src/openssl/ssl/s3_enc.c

Source (jump to first uncovered line)
/*
 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright 2005 Nokia. All rights reserved.
 *
 * Licensed under the OpenSSL license (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_locl.h"
#include <openssl/evp.h>
#include <openssl/md5.h>
#include "internal/cryptlib.h"

static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
{
    EVP_MD_CTX *m5;
    EVP_MD_CTX *s1;
    unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
    unsigned char c = 'A';
    unsigned int i, j, k;
    int ret = 0;

#ifdef CHARSET_EBCDIC
    c = os_toascii[c];          /* 'A' in ASCII */
#endif
    k = 0;
    m5 = EVP_MD_CTX_new();
    s1 = EVP_MD_CTX_new();
    if (m5 == NULL || s1 == NULL) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
                 ERR_R_MALLOC_FAILURE);
        goto err;
    }
    EVP_MD_CTX_set_flags(m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
    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, SSL_F_SSL3_GENERATE_KEY_BLOCK,
                     ERR_R_INTERNAL_ERROR);
            goto err;
        }

        for (j = 0; j < k; j++)
            buf[j] = c;
        c++;
        if (!EVP_DigestInit_ex(s1, EVP_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, EVP_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, SSL_F_SSL3_GENERATE_KEY_BLOCK,
                     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,
                         SSL_F_SSL3_GENERATE_KEY_BLOCK, 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,
                         SSL_F_SSL3_GENERATE_KEY_BLOCK, 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);
    return ret;
}

int ssl3_change_cipher_state(SSL *s, int which)
{
    unsigned char *p, *mac_secret;
    unsigned char exp_key[EVP_MAX_KEY_LENGTH];
    unsigned char exp_iv[EVP_MAX_IV_LENGTH];
    unsigned char *ms, *key, *iv;
    EVP_CIPHER_CTX *dd;
    const EVP_CIPHER *c;
#ifndef OPENSSL_NO_COMP
    COMP_METHOD *comp;
#endif
    const EVP_MD *m;
    int mdi;
    size_t n, i, j, k, cl;
    int reuse_dd = 0;

    c = s->s3->tmp.new_sym_enc;
    m = s->s3->tmp.new_hash;
    /* m == NULL will lead to a crash later */
    if (!ossl_assert(m != NULL)) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
                 ERR_R_INTERNAL_ERROR);
        goto err;
    }
#ifndef OPENSSL_NO_COMP
    if (s->s3->tmp.new_compression == NULL)
        comp = NULL;
    else
        comp = s->s3->tmp.new_compression->method;
#endif

    if (which & SSL3_CC_READ) {
        if (s->enc_read_ctx != NULL) {
            reuse_dd = 1;
        } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
                     ERR_R_MALLOC_FAILURE);
            goto err;
        } else {
            /*
             * make sure it's initialised in case we exit later with an error
             */
            EVP_CIPHER_CTX_reset(s->enc_read_ctx);
        }
        dd = s->enc_read_ctx;

        if (ssl_replace_hash(&s->read_hash, m) == NULL) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
                     ERR_R_INTERNAL_ERROR);
            goto err;
        }
#ifndef OPENSSL_NO_COMP
        /* COMPRESS */
        COMP_CTX_free(s->expand);
        s->expand = NULL;
        if (comp != NULL) {
            s->expand = COMP_CTX_new(comp);
            if (s->expand == NULL) {
                SSLfatal(s, SSL_AD_INTERNAL_ERROR,
                         SSL_F_SSL3_CHANGE_CIPHER_STATE,
                         SSL_R_COMPRESSION_LIBRARY_ERROR);
                goto err;
            }
        }
#endif
        RECORD_LAYER_reset_read_sequence(&s->rlayer);
        mac_secret = &(s->s3->read_mac_secret[0]);
    } else {
        s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
        if (s->enc_write_ctx != NULL) {
            reuse_dd = 1;
        } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
                     ERR_R_MALLOC_FAILURE);
            goto err;
        } else {
            /*
             * make sure it's initialised in case we exit later with an error
             */
            EVP_CIPHER_CTX_reset(s->enc_write_ctx);
        }
        dd = s->enc_write_ctx;
        if (ssl_replace_hash(&s->write_hash, m) == NULL) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
                     ERR_R_MALLOC_FAILURE);
            goto err;
        }
#ifndef OPENSSL_NO_COMP
        /* COMPRESS */
        COMP_CTX_free(s->compress);
        s->compress = NULL;
        if (comp != NULL) {
            s->compress = COMP_CTX_new(comp);
            if (s->compress == NULL) {
                SSLfatal(s, SSL_AD_INTERNAL_ERROR,
                         SSL_F_SSL3_CHANGE_CIPHER_STATE,
                         SSL_R_COMPRESSION_LIBRARY_ERROR);
                goto err;
            }
        }
#endif
        RECORD_LAYER_reset_write_sequence(&s->rlayer);
        mac_secret = &(s->s3->write_mac_secret[0]);
    }

    if (reuse_dd)
        EVP_CIPHER_CTX_reset(dd);

    p = s->s3->tmp.key_block;
    mdi = EVP_MD_size(m);
    if (mdi < 0) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
                 ERR_R_INTERNAL_ERROR);
        goto err;
    }
    i = mdi;
    cl = EVP_CIPHER_key_length(c);
    j = cl;
    k = EVP_CIPHER_iv_length(c);
    if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
        (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
        ms = &(p[0]);
        n = i + i;
        key = &(p[n]);
        n += j + j;
        iv = &(p[n]);
        n += k + k;
    } else {
        n = i;
        ms = &(p[n]);
        n += i + j;
        key = &(p[n]);
        n += j + k;
        iv = &(p[n]);
        n += k;
    }

    if (n > s->s3->tmp.key_block_length) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
                 ERR_R_INTERNAL_ERROR);
        goto err;
    }

    memcpy(mac_secret, ms, i);

    if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
                 ERR_R_INTERNAL_ERROR);
        goto err;
    }

    s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
    OPENSSL_cleanse(exp_key, sizeof(exp_key));
    OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
    return 1;
 err:
    OPENSSL_cleanse(exp_key, sizeof(exp_key));
    OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
    return 0;
}

int ssl3_setup_key_block(SSL *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(s->session, &c, &hash, NULL, NULL, &comp, 0)) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_SETUP_KEY_BLOCK,
                 SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
        return 0;
    }

    s->s3->tmp.new_sym_enc = c;
    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_size(hash);
    if (num < 0)
        return 0;

    num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c);
    num *= 2;

    ssl3_cleanup_key_block(s);

    if ((p = OPENSSL_malloc(num)) == NULL) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_SETUP_KEY_BLOCK,
                 ERR_R_MALLOC_FAILURE);
        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);

    if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) {
        /*
         * enable vulnerability countermeasure for CBC ciphers with known-IV
         * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
         */
        s->s3->need_empty_fragments = 1;

        if (s->session->cipher != NULL) {
            if (s->session->cipher->algorithm_enc == SSL_eNULL)
                s->s3->need_empty_fragments = 0;

#ifndef OPENSSL_NO_RC4
            if (s->session->cipher->algorithm_enc == SSL_RC4)
                s->s3->need_empty_fragments = 0;
#endif
        }
    }

    return ret;
}

void ssl3_cleanup_key_block(SSL *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 *s)
{
    BIO *buf = BIO_new(BIO_s_mem());

    if (buf == NULL) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_INIT_FINISHED_MAC,
                 ERR_R_MALLOC_FAILURE);
        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 *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 *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_F_SSL3_FINISH_MAC,
                     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, SSL_F_SSL3_FINISH_MAC,
                     ERR_R_INTERNAL_ERROR);
            return 0;
        }
    } else {
        ret = EVP_DigestUpdate(s->s3->handshake_dgst, buf, len);
        if (!ret) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
                     ERR_R_INTERNAL_ERROR);
            return 0;
        }
    }
    return 1;
}

int ssl3_digest_cached_records(SSL *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_F_SSL3_DIGEST_CACHED_RECORDS,
                     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, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
                     ERR_R_MALLOC_FAILURE);
            return 0;
        }

        md = ssl_handshake_md(s);
        if (md == NULL || !EVP_DigestInit_ex(s->s3->handshake_dgst, md, NULL)
            || !EVP_DigestUpdate(s->s3->handshake_dgst, hdata, hdatalen)) {
            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
                     ERR_R_INTERNAL_ERROR);
            return 0;
        }
    }
    if (keep == 0) {
        BIO_free(s->s3->handshake_buffer);
        s->s3->handshake_buffer = NULL;
    }

    return 1;
}

size_t ssl3_final_finish_mac(SSL *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_type(s->s3->handshake_dgst) != NID_md5_sha1) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
                 SSL_R_NO_REQUIRED_DIGEST);
        return 0;
    }

    ctx = EVP_MD_CTX_new();
    if (ctx == NULL) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
                 ERR_R_MALLOC_FAILURE);
        return 0;
    }
    if (!EVP_MD_CTX_copy_ex(ctx, s->s3->handshake_dgst)) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
                 ERR_R_INTERNAL_ERROR);
        return 0;
    }

    ret = EVP_MD_CTX_size(ctx);
    if (ret < 0) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
                 ERR_R_INTERNAL_ERROR);
        EVP_MD_CTX_reset(ctx);
        return 0;
    }

    if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0)
        || EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET,
                           (int)s->session->master_key_length,
                           s->session->master_key) <= 0
        || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
                 ERR_R_INTERNAL_ERROR);
        ret = 0;
    }

    EVP_MD_CTX_free(ctx);

    return ret;
}

int ssl3_generate_master_secret(SSL *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, SSL_F_SSL3_GENERATE_MASTER_SECRET,
                 ERR_R_MALLOC_FAILURE);
        return 0;
    }
    for (i = 0; i < 3; i++) {
        if (EVP_DigestInit_ex(ctx, s->ctx->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
               /* TODO(size_t) : convert me */
            || EVP_DigestFinal_ex(ctx, buf, &n) <= 0
            || EVP_DigestInit_ex(ctx, s->ctx->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,
                     SSL_F_SSL3_GENERATE_MASTER_SECRET, 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;
    default:
        return -1;
    }
}

Coverage Report

Created: 2018-08-29 13:53

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
3		* Copyright 2005 Nokia. All rights reserved.
4		*
5		* Licensed under the OpenSSL license (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_locl.h"
13		#include <openssl/evp.h>
14		#include <openssl/md5.h>
15		#include "internal/cryptlib.h"
16
17		static int ssl3_generate_key_block(SSL s, unsigned char km, int num)
18	0	{
19	0	EVP_MD_CTX *m5;
20	0	EVP_MD_CTX *s1;
21	0	unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
22	0	unsigned char c = 'A';
23	0	unsigned int i, j, k;
24	0	int ret = 0;
25	0
26		#ifdef CHARSET_EBCDIC
27		c = os_toascii[c]; /* 'A' in ASCII */
28		#endif
29		k = 0;
30	0	m5 = EVP_MD_CTX_new();
31	0	s1 = EVP_MD_CTX_new();
32	0	if (m5 == NULL \|\| s1 == NULL) {
33	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
34	0	ERR_R_MALLOC_FAILURE);
35	0	goto err;
36	0	}
37	0	EVP_MD_CTX_set_flags(m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
38	0	for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
39	0	k++;
40	0	if (k > sizeof(buf)) {
41	0	/* bug: 'buf' is too small for this ciphersuite */
42	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
43	0	ERR_R_INTERNAL_ERROR);
44	0	goto err;
45	0	}
46	0
47	0	for (j = 0; j < k; j++)
48	0	buf[j] = c;
49	0	c++;
50	0	if (!EVP_DigestInit_ex(s1, EVP_sha1(), NULL)
51	0	\|\| !EVP_DigestUpdate(s1, buf, k)
52	0	\|\| !EVP_DigestUpdate(s1, s->session->master_key,
53	0	s->session->master_key_length)
54	0	\|\| !EVP_DigestUpdate(s1, s->s3->server_random, SSL3_RANDOM_SIZE)
55	0	\|\| !EVP_DigestUpdate(s1, s->s3->client_random, SSL3_RANDOM_SIZE)
56	0	\|\| !EVP_DigestFinal_ex(s1, smd, NULL)
57	0	\|\| !EVP_DigestInit_ex(m5, EVP_md5(), NULL)
58	0	\|\| !EVP_DigestUpdate(m5, s->session->master_key,
59	0	s->session->master_key_length)
60	0	\|\| !EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH)) {
61	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
62	0	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,
68	0	SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
69	0	goto err;
70	0	}
71	0	memcpy(km, smd, (num - i));
72	0	} else {
73	0	if (!EVP_DigestFinal_ex(m5, km, NULL)) {
74	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR,
75	0	SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
76	0	goto err;
77	0	}
78	0	}
79	0
80	0	km += MD5_DIGEST_LENGTH;
81	0	}
82	0	OPENSSL_cleanse(smd, sizeof(smd));
83	0	ret = 1;
84	0	err:
85	0	EVP_MD_CTX_free(m5);
86	0	EVP_MD_CTX_free(s1);
87	0	return ret;
88	0	}
89
90		int ssl3_change_cipher_state(SSL *s, int which)
91	0	{
92	0	unsigned char p, mac_secret;
93	0	unsigned char exp_key[EVP_MAX_KEY_LENGTH];
94	0	unsigned char exp_iv[EVP_MAX_IV_LENGTH];
95	0	unsigned char ms, key, *iv;
96	0	EVP_CIPHER_CTX *dd;
97	0	const EVP_CIPHER *c;
98	0	#ifndef OPENSSL_NO_COMP
99	0	COMP_METHOD *comp;
100	0	#endif
101	0	const EVP_MD *m;
102	0	int mdi;
103	0	size_t n, i, j, k, cl;
104	0	int reuse_dd = 0;
105	0
106	0	c = s->s3->tmp.new_sym_enc;
107	0	m = s->s3->tmp.new_hash;
108	0	/* m == NULL will lead to a crash later */
109	0	if (!ossl_assert(m != NULL)) {
110	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
111	0	ERR_R_INTERNAL_ERROR);
112	0	goto err;
113	0	}
114	0	#ifndef OPENSSL_NO_COMP
115	0	if (s->s3->tmp.new_compression == NULL)
116	0	comp = NULL;
117	0	else
118	0	comp = s->s3->tmp.new_compression->method;
119	0	#endif
120	0
121	0	if (which & SSL3_CC_READ) {
122	0	if (s->enc_read_ctx != NULL) {
123	0	reuse_dd = 1;
124	0	} else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
125	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
126	0	ERR_R_MALLOC_FAILURE);
127	0	goto err;
128	0	} else {
129	0	/*
130	0	* make sure it's initialised in case we exit later with an error
131	0	*/
132	0	EVP_CIPHER_CTX_reset(s->enc_read_ctx);
133	0	}
134	0	dd = s->enc_read_ctx;
135	0
136	0	if (ssl_replace_hash(&s->read_hash, m) == NULL) {
137	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
138	0	ERR_R_INTERNAL_ERROR);
139	0	goto err;
140	0	}
141	0	#ifndef OPENSSL_NO_COMP
142	0	/* COMPRESS */
143	0	COMP_CTX_free(s->expand);
144	0	s->expand = NULL;
145	0	if (comp != NULL) {
146	0	s->expand = COMP_CTX_new(comp);
147	0	if (s->expand == NULL) {
148	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR,
149	0	SSL_F_SSL3_CHANGE_CIPHER_STATE,
150	0	SSL_R_COMPRESSION_LIBRARY_ERROR);
151	0	goto err;
152	0	}
153	0	}
154	0	#endif
155	0	RECORD_LAYER_reset_read_sequence(&s->rlayer);
156	0	mac_secret = &(s->s3->read_mac_secret[0]);
157	0	} else {
158	0	s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
159	0	if (s->enc_write_ctx != NULL) {
160	0	reuse_dd = 1;
161	0	} else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
162	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
163	0	ERR_R_MALLOC_FAILURE);
164	0	goto err;
165	0	} else {
166	0	/*
167	0	* make sure it's initialised in case we exit later with an error
168	0	*/
169	0	EVP_CIPHER_CTX_reset(s->enc_write_ctx);
170	0	}
171	0	dd = s->enc_write_ctx;
172	0	if (ssl_replace_hash(&s->write_hash, m) == NULL) {
173	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
174	0	ERR_R_MALLOC_FAILURE);
175	0	goto err;
176	0	}
177	0	#ifndef OPENSSL_NO_COMP
178	0	/* COMPRESS */
179	0	COMP_CTX_free(s->compress);
180	0	s->compress = NULL;
181	0	if (comp != NULL) {
182	0	s->compress = COMP_CTX_new(comp);
183	0	if (s->compress == NULL) {
184	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR,
185	0	SSL_F_SSL3_CHANGE_CIPHER_STATE,
186	0	SSL_R_COMPRESSION_LIBRARY_ERROR);
187	0	goto err;
188	0	}
189	0	}
190	0	#endif
191	0	RECORD_LAYER_reset_write_sequence(&s->rlayer);
192	0	mac_secret = &(s->s3->write_mac_secret[0]);
193	0	}
194	0
195	0	if (reuse_dd)
196	0	EVP_CIPHER_CTX_reset(dd);
197	0
198	0	p = s->s3->tmp.key_block;
199	0	mdi = EVP_MD_size(m);
200	0	if (mdi < 0) {
201	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
202	0	ERR_R_INTERNAL_ERROR);
203	0	goto err;
204	0	}
205	0	i = mdi;
206	0	cl = EVP_CIPHER_key_length(c);
207	0	j = cl;
208	0	k = EVP_CIPHER_iv_length(c);
209	0	if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) \|\|
210	0	(which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
211	0	ms = &(p[0]);
212	0	n = i + i;
213	0	key = &(p[n]);
214	0	n += j + j;
215	0	iv = &(p[n]);
216	0	n += k + k;
217	0	} else {
218	0	n = i;
219	0	ms = &(p[n]);
220	0	n += i + j;
221	0	key = &(p[n]);
222	0	n += j + k;
223	0	iv = &(p[n]);
224	0	n += k;
225	0	}
226	0
227	0	if (n > s->s3->tmp.key_block_length) {
228	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
229	0	ERR_R_INTERNAL_ERROR);
230	0	goto err;
231	0	}
232	0
233	0	memcpy(mac_secret, ms, i);
234	0
235	0	if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
236	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
237	0	ERR_R_INTERNAL_ERROR);
238	0	goto err;
239	0	}
240	0
241	0	s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
242	0	OPENSSL_cleanse(exp_key, sizeof(exp_key));
243	0	OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
244	0	return 1;
245	0	err:
246	0	OPENSSL_cleanse(exp_key, sizeof(exp_key));
247	0	OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
248	0	return 0;
249	0	}
250
251		int ssl3_setup_key_block(SSL *s)
252	0	{
253	0	unsigned char *p;
254	0	const EVP_CIPHER *c;
255	0	const EVP_MD *hash;
256	0	int num;
257	0	int ret = 0;
258	0	SSL_COMP *comp;
259	0
260	0	if (s->s3->tmp.key_block_length != 0)
261	0	return 1;
262	0
263	0	if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL, &comp, 0)) {
264	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_SETUP_KEY_BLOCK,
265	0	SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
266	0	return 0;
267	0	}
268	0
269	0	s->s3->tmp.new_sym_enc = c;
270	0	s->s3->tmp.new_hash = hash;
271		#ifdef OPENSSL_NO_COMP
272		s->s3->tmp.new_compression = NULL;
273		#else
274		s->s3->tmp.new_compression = comp;
275	0	#endif
276	0
277	0	num = EVP_MD_size(hash);
278	0	if (num < 0)
279	0	return 0;
280	0
281	0	num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c);
282	0	num *= 2;
283	0
284	0	ssl3_cleanup_key_block(s);
285	0
286	0	if ((p = OPENSSL_malloc(num)) == NULL) {
287	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_SETUP_KEY_BLOCK,
288	0	ERR_R_MALLOC_FAILURE);
289	0	return 0;
290	0	}
291	0
292	0	s->s3->tmp.key_block_length = num;
293	0	s->s3->tmp.key_block = p;
294	0
295	0	/* Calls SSLfatal() as required */
296	0	ret = ssl3_generate_key_block(s, p, num);
297	0
298	0	if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) {
299	0	/*
300	0	* enable vulnerability countermeasure for CBC ciphers with known-IV
301	0	* problem (http://www.openssl.org/~bodo/tls-cbc.txt)
302	0	*/
303	0	s->s3->need_empty_fragments = 1;
304	0
305	0	if (s->session->cipher != NULL) {
306	0	if (s->session->cipher->algorithm_enc == SSL_eNULL)
307	0	s->s3->need_empty_fragments = 0;
308	0
309	0	#ifndef OPENSSL_NO_RC4
310	0	if (s->session->cipher->algorithm_enc == SSL_RC4)
311	0	s->s3->need_empty_fragments = 0;
312	0	#endif
313	0	}
314	0	}
315	0
316	0	return ret;
317	0	}
318
319		void ssl3_cleanup_key_block(SSL *s)
320	0	{
321	0	OPENSSL_clear_free(s->s3->tmp.key_block, s->s3->tmp.key_block_length);
322	0	s->s3->tmp.key_block = NULL;
323	0	s->s3->tmp.key_block_length = 0;
324	0	}
325
326		int ssl3_init_finished_mac(SSL *s)
327	0	{
328	0	BIO *buf = BIO_new(BIO_s_mem());
329	0
330	0	if (buf == NULL) {
331	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_INIT_FINISHED_MAC,
332	0	ERR_R_MALLOC_FAILURE);
333	0	return 0;
334	0	}
335	0	ssl3_free_digest_list(s);
336	0	s->s3->handshake_buffer = buf;
337	0	(void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE);
338	0	return 1;
339	0	}
340
341		/*
342		* Free digest list. Also frees handshake buffer since they are always freed
343		* together.
344		*/
345
346		void ssl3_free_digest_list(SSL *s)
347	0	{
348	0	BIO_free(s->s3->handshake_buffer);
349	0	s->s3->handshake_buffer = NULL;
350	0	EVP_MD_CTX_free(s->s3->handshake_dgst);
351	0	s->s3->handshake_dgst = NULL;
352	0	}
353
354		int ssl3_finish_mac(SSL s, const unsigned char buf, size_t len)
355	0	{
356	0	int ret;
357	0
358	0	if (s->s3->handshake_dgst == NULL) {
359	0	/* Note: this writes to a memory BIO so a failure is a fatal error */
360	0	if (len > INT_MAX) {
361	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
362	0	SSL_R_OVERFLOW_ERROR);
363	0	return 0;
364	0	}
365	0	ret = BIO_write(s->s3->handshake_buffer, (void *)buf, (int)len);
366	0	if (ret <= 0 \|\| ret != (int)len) {
367	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
368	0	ERR_R_INTERNAL_ERROR);
369	0	return 0;
370	0	}
371	0	} else {
372	0	ret = EVP_DigestUpdate(s->s3->handshake_dgst, buf, len);
373	0	if (!ret) {
374	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
375	0	ERR_R_INTERNAL_ERROR);
376	0	return 0;
377	0	}
378	0	}
379	0	return 1;
380	0	}
381
382		int ssl3_digest_cached_records(SSL *s, int keep)
383	0	{
384	0	const EVP_MD *md;
385	0	long hdatalen;
386	0	void *hdata;
387	0
388	0	if (s->s3->handshake_dgst == NULL) {
389	0	hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
390	0	if (hdatalen <= 0) {
391	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
392	0	SSL_R_BAD_HANDSHAKE_LENGTH);
393	0	return 0;
394	0	}
395	0
396	0	s->s3->handshake_dgst = EVP_MD_CTX_new();
397	0	if (s->s3->handshake_dgst == NULL) {
398	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
399	0	ERR_R_MALLOC_FAILURE);
400	0	return 0;
401	0	}
402	0
403	0	md = ssl_handshake_md(s);
404	0	if (md == NULL \|\| !EVP_DigestInit_ex(s->s3->handshake_dgst, md, NULL)
405	0	\|\| !EVP_DigestUpdate(s->s3->handshake_dgst, hdata, hdatalen)) {
406	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
407	0	ERR_R_INTERNAL_ERROR);
408	0	return 0;
409	0	}
410	0	}
411	0	if (keep == 0) {
412	0	BIO_free(s->s3->handshake_buffer);
413	0	s->s3->handshake_buffer = NULL;
414	0	}
415	0
416	0	return 1;
417	0	}
418
419		size_t ssl3_final_finish_mac(SSL s, const char sender, size_t len,
420		unsigned char *p)
421	0	{
422	0	int ret;
423	0	EVP_MD_CTX *ctx = NULL;
424	0
425	0	if (!ssl3_digest_cached_records(s, 0)) {
426	0	/* SSLfatal() already called */
427	0	return 0;
428	0	}
429	0
430	0	if (EVP_MD_CTX_type(s->s3->handshake_dgst) != NID_md5_sha1) {
431	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
432	0	SSL_R_NO_REQUIRED_DIGEST);
433	0	return 0;
434	0	}
435	0
436	0	ctx = EVP_MD_CTX_new();
437	0	if (ctx == NULL) {
438	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
439	0	ERR_R_MALLOC_FAILURE);
440	0	return 0;
441	0	}
442	0	if (!EVP_MD_CTX_copy_ex(ctx, s->s3->handshake_dgst)) {
443	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
444	0	ERR_R_INTERNAL_ERROR);
445	0	return 0;
446	0	}
447	0
448	0	ret = EVP_MD_CTX_size(ctx);
449	0	if (ret < 0) {
450	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
451	0	ERR_R_INTERNAL_ERROR);
452	0	EVP_MD_CTX_reset(ctx);
453	0	return 0;
454	0	}
455	0
456	0	if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0)
457	0	\|\| EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET,
458	0	(int)s->session->master_key_length,
459	0	s->session->master_key) <= 0
460	0	\|\| EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
461	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
462	0	ERR_R_INTERNAL_ERROR);
463	0	ret = 0;
464	0	}
465	0
466	0	EVP_MD_CTX_free(ctx);
467	0
468	0	return ret;
469	0	}
470
471		int ssl3_generate_master_secret(SSL s, unsigned char out, unsigned char *p,
472		size_t len, size_t *secret_size)
473	0	{
474	0	static const unsigned char *salt[3] = {
475	0	#ifndef CHARSET_EBCDIC
476	0	(const unsigned char *)"A",
477	0	(const unsigned char *)"BB",
478	0	(const unsigned char *)"CCC",
479		#else
480		(const unsigned char *)"\x41",
481		(const unsigned char *)"\x42\x42",
482		(const unsigned char *)"\x43\x43\x43",
483		#endif
484		};
485	0	unsigned char buf[EVP_MAX_MD_SIZE];
486	0	EVP_MD_CTX *ctx = EVP_MD_CTX_new();
487	0	int i, ret = 1;
488	0	unsigned int n;
489	0	size_t ret_secret_size = 0;
490	0
491	0	if (ctx == NULL) {
492	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_MASTER_SECRET,
493	0	ERR_R_MALLOC_FAILURE);
494	0	return 0;
495	0	}
496	0	for (i = 0; i < 3; i++) {
497	0	if (EVP_DigestInit_ex(ctx, s->ctx->sha1, NULL) <= 0
498	0	\|\| EVP_DigestUpdate(ctx, salt[i],
499	0	strlen((const char *)salt[i])) <= 0
500	0	\|\| EVP_DigestUpdate(ctx, p, len) <= 0
501	0	\|\| EVP_DigestUpdate(ctx, &(s->s3->client_random[0]),
502	0	SSL3_RANDOM_SIZE) <= 0
503	0	\|\| EVP_DigestUpdate(ctx, &(s->s3->server_random[0]),
504	0	SSL3_RANDOM_SIZE) <= 0
505	0	/* TODO(size_t) : convert me */
506	0	\|\| EVP_DigestFinal_ex(ctx, buf, &n) <= 0
507	0	\|\| EVP_DigestInit_ex(ctx, s->ctx->md5, NULL) <= 0
508	0	\|\| EVP_DigestUpdate(ctx, p, len) <= 0
509	0	\|\| EVP_DigestUpdate(ctx, buf, n) <= 0
510	0	\|\| EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
511	0	SSLfatal(s, SSL_AD_INTERNAL_ERROR,
512	0	SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR);
513	0	ret = 0;
514	0	break;
515	0	}
516	0	out += n;
517	0	ret_secret_size += n;
518	0	}
519	0	EVP_MD_CTX_free(ctx);
520	0
521	0	OPENSSL_cleanse(buf, sizeof(buf));
522	0	if (ret)
523	0	*secret_size = ret_secret_size;
524	0	return ret;
525	0	}
526
527		int ssl3_alert_code(int code)
528	0	{
529	0	switch (code) {
530	0	case SSL_AD_CLOSE_NOTIFY:
531	0	return SSL3_AD_CLOSE_NOTIFY;
532	0	case SSL_AD_UNEXPECTED_MESSAGE:
533	0	return SSL3_AD_UNEXPECTED_MESSAGE;
534	0	case SSL_AD_BAD_RECORD_MAC:
535	0	return SSL3_AD_BAD_RECORD_MAC;
536	0	case SSL_AD_DECRYPTION_FAILED:
537	0	return SSL3_AD_BAD_RECORD_MAC;
538	0	case SSL_AD_RECORD_OVERFLOW:
539	0	return SSL3_AD_BAD_RECORD_MAC;
540	0	case SSL_AD_DECOMPRESSION_FAILURE:
541	0	return SSL3_AD_DECOMPRESSION_FAILURE;
542	0	case SSL_AD_HANDSHAKE_FAILURE:
543	0	return SSL3_AD_HANDSHAKE_FAILURE;
544	0	case SSL_AD_NO_CERTIFICATE:
545	0	return SSL3_AD_NO_CERTIFICATE;
546	0	case SSL_AD_BAD_CERTIFICATE:
547	0	return SSL3_AD_BAD_CERTIFICATE;
548	0	case SSL_AD_UNSUPPORTED_CERTIFICATE:
549	0	return SSL3_AD_UNSUPPORTED_CERTIFICATE;
550	0	case SSL_AD_CERTIFICATE_REVOKED:
551	0	return SSL3_AD_CERTIFICATE_REVOKED;
552	0	case SSL_AD_CERTIFICATE_EXPIRED:
553	0	return SSL3_AD_CERTIFICATE_EXPIRED;
554	0	case SSL_AD_CERTIFICATE_UNKNOWN:
555	0	return SSL3_AD_CERTIFICATE_UNKNOWN;
556	0	case SSL_AD_ILLEGAL_PARAMETER:
557	0	return SSL3_AD_ILLEGAL_PARAMETER;
558	0	case SSL_AD_UNKNOWN_CA:
559	0	return SSL3_AD_BAD_CERTIFICATE;
560	0	case SSL_AD_ACCESS_DENIED:
561	0	return SSL3_AD_HANDSHAKE_FAILURE;
562	0	case SSL_AD_DECODE_ERROR:
563	0	return SSL3_AD_HANDSHAKE_FAILURE;
564	0	case SSL_AD_DECRYPT_ERROR:
565	0	return SSL3_AD_HANDSHAKE_FAILURE;
566	0	case SSL_AD_EXPORT_RESTRICTION:
567	0	return SSL3_AD_HANDSHAKE_FAILURE;
568	0	case SSL_AD_PROTOCOL_VERSION:
569	0	return SSL3_AD_HANDSHAKE_FAILURE;
570	0	case SSL_AD_INSUFFICIENT_SECURITY:
571	0	return SSL3_AD_HANDSHAKE_FAILURE;
572	0	case SSL_AD_INTERNAL_ERROR:
573	0	return SSL3_AD_HANDSHAKE_FAILURE;
574	0	case SSL_AD_USER_CANCELLED:
575	0	return SSL3_AD_HANDSHAKE_FAILURE;
576	0	case SSL_AD_NO_RENEGOTIATION:
577	0	return -1; /* Don't send it :-) */
578	0	case SSL_AD_UNSUPPORTED_EXTENSION:
579	0	return SSL3_AD_HANDSHAKE_FAILURE;
580	0	case SSL_AD_CERTIFICATE_UNOBTAINABLE:
581	0	return SSL3_AD_HANDSHAKE_FAILURE;
582	0	case SSL_AD_UNRECOGNIZED_NAME:
583	0	return SSL3_AD_HANDSHAKE_FAILURE;
584	0	case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
585	0	return SSL3_AD_HANDSHAKE_FAILURE;
586	0	case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
587	0	return SSL3_AD_HANDSHAKE_FAILURE;
588	0	case SSL_AD_UNKNOWN_PSK_IDENTITY:
589	0	return TLS1_AD_UNKNOWN_PSK_IDENTITY;
590	0	case SSL_AD_INAPPROPRIATE_FALLBACK:
591	0	return TLS1_AD_INAPPROPRIATE_FALLBACK;
592	0	case SSL_AD_NO_APPLICATION_PROTOCOL:
593	0	return TLS1_AD_NO_APPLICATION_PROTOCOL;
594	0	case SSL_AD_CERTIFICATE_REQUIRED:
595	0	return SSL_AD_HANDSHAKE_FAILURE;
596	0	default:
597	0	return -1;
598	0	}
599	0	}