path: root/contrib/libs/openssl/ssl/s3_enc.c

/* 
 * Copyright 1995-2019 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_local.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 *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; 
    return 1; 
 err: 
    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); 
        ret = 0; 
        goto err; 
    } 
 
    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); 
        ret = 0; 
        goto err; 
    } 
 
    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; 
    } 
 
 err: 
    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; 
    } 
}