path: root/contrib/libs/openssl/ssl/ssl_asn1.c

/* 
 * 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 <stdlib.h> 
#include "ssl_local.h"
#include <openssl/asn1t.h> 
#include <openssl/x509.h> 
 
typedef struct { 
    uint32_t version; 
    int32_t ssl_version; 
    ASN1_OCTET_STRING *cipher; 
    ASN1_OCTET_STRING *comp_id; 
    ASN1_OCTET_STRING *master_key; 
    ASN1_OCTET_STRING *session_id; 
    ASN1_OCTET_STRING *key_arg; 
    int64_t time; 
    int64_t timeout; 
    X509 *peer; 
    ASN1_OCTET_STRING *session_id_context; 
    int32_t verify_result; 
    ASN1_OCTET_STRING *tlsext_hostname; 
    uint64_t tlsext_tick_lifetime_hint; 
    uint32_t tlsext_tick_age_add; 
    ASN1_OCTET_STRING *tlsext_tick; 
#ifndef OPENSSL_NO_PSK 
    ASN1_OCTET_STRING *psk_identity_hint; 
    ASN1_OCTET_STRING *psk_identity; 
#endif 
#ifndef OPENSSL_NO_SRP 
    ASN1_OCTET_STRING *srp_username; 
#endif 
    uint64_t flags; 
    uint32_t max_early_data; 
    ASN1_OCTET_STRING *alpn_selected; 
    uint32_t tlsext_max_fragment_len_mode; 
    ASN1_OCTET_STRING *ticket_appdata; 
} SSL_SESSION_ASN1; 
 
ASN1_SEQUENCE(SSL_SESSION_ASN1) = { 
    ASN1_EMBED(SSL_SESSION_ASN1, version, UINT32), 
    ASN1_EMBED(SSL_SESSION_ASN1, ssl_version, INT32), 
    ASN1_SIMPLE(SSL_SESSION_ASN1, cipher, ASN1_OCTET_STRING), 
    ASN1_SIMPLE(SSL_SESSION_ASN1, session_id, ASN1_OCTET_STRING), 
    ASN1_SIMPLE(SSL_SESSION_ASN1, master_key, ASN1_OCTET_STRING), 
    ASN1_IMP_OPT(SSL_SESSION_ASN1, key_arg, ASN1_OCTET_STRING, 0), 
    ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, time, ZINT64, 1), 
    ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, timeout, ZINT64, 2), 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, peer, X509, 3), 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, session_id_context, ASN1_OCTET_STRING, 4), 
    ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, verify_result, ZINT32, 5), 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_hostname, ASN1_OCTET_STRING, 6), 
#ifndef OPENSSL_NO_PSK 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, psk_identity_hint, ASN1_OCTET_STRING, 7), 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, psk_identity, ASN1_OCTET_STRING, 8), 
#endif 
    ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_tick_lifetime_hint, ZUINT64, 9), 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_tick, ASN1_OCTET_STRING, 10), 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, comp_id, ASN1_OCTET_STRING, 11), 
#ifndef OPENSSL_NO_SRP 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, srp_username, ASN1_OCTET_STRING, 12), 
#endif 
    ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, flags, ZUINT64, 13), 
    ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_tick_age_add, ZUINT32, 14), 
    ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, max_early_data, ZUINT32, 15), 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, alpn_selected, ASN1_OCTET_STRING, 16), 
    ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_max_fragment_len_mode, ZUINT32, 17), 
    ASN1_EXP_OPT(SSL_SESSION_ASN1, ticket_appdata, ASN1_OCTET_STRING, 18) 
} static_ASN1_SEQUENCE_END(SSL_SESSION_ASN1) 
 
IMPLEMENT_STATIC_ASN1_ENCODE_FUNCTIONS(SSL_SESSION_ASN1) 
 
/* Utility functions for i2d_SSL_SESSION */ 
 
/* Initialise OCTET STRING from buffer and length */ 
 
static void ssl_session_oinit(ASN1_OCTET_STRING **dest, ASN1_OCTET_STRING *os, 
                              unsigned char *data, size_t len) 
{ 
    os->data = data; 
    os->length = (int)len; 
    os->flags = 0; 
    *dest = os; 
} 
 
/* Initialise OCTET STRING from string */ 
static void ssl_session_sinit(ASN1_OCTET_STRING **dest, ASN1_OCTET_STRING *os, 
                              char *data) 
{ 
    if (data != NULL) 
        ssl_session_oinit(dest, os, (unsigned char *)data, strlen(data)); 
    else 
        *dest = NULL; 
} 
 
int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp) 
{ 
 
    SSL_SESSION_ASN1 as; 
 
    ASN1_OCTET_STRING cipher; 
    unsigned char cipher_data[2]; 
    ASN1_OCTET_STRING master_key, session_id, sid_ctx; 
 
#ifndef OPENSSL_NO_COMP 
    ASN1_OCTET_STRING comp_id; 
    unsigned char comp_id_data; 
#endif 
    ASN1_OCTET_STRING tlsext_hostname, tlsext_tick; 
#ifndef OPENSSL_NO_SRP 
    ASN1_OCTET_STRING srp_username; 
#endif 
#ifndef OPENSSL_NO_PSK 
    ASN1_OCTET_STRING psk_identity, psk_identity_hint; 
#endif 
    ASN1_OCTET_STRING alpn_selected; 
    ASN1_OCTET_STRING ticket_appdata; 
 
    long l; 
 
    if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0))) 
        return 0; 
 
    memset(&as, 0, sizeof(as)); 
 
    as.version = SSL_SESSION_ASN1_VERSION; 
    as.ssl_version = in->ssl_version; 
 
    if (in->cipher == NULL) 
        l = in->cipher_id; 
    else 
        l = in->cipher->id; 
    cipher_data[0] = ((unsigned char)(l >> 8L)) & 0xff; 
    cipher_data[1] = ((unsigned char)(l)) & 0xff; 
 
    ssl_session_oinit(&as.cipher, &cipher, cipher_data, 2); 
 
#ifndef OPENSSL_NO_COMP 
    if (in->compress_meth) { 
        comp_id_data = (unsigned char)in->compress_meth; 
        ssl_session_oinit(&as.comp_id, &comp_id, &comp_id_data, 1); 
    } 
#endif 
 
    ssl_session_oinit(&as.master_key, &master_key, 
                      in->master_key, in->master_key_length); 
 
    ssl_session_oinit(&as.session_id, &session_id, 
                      in->session_id, in->session_id_length); 
 
    ssl_session_oinit(&as.session_id_context, &sid_ctx, 
                      in->sid_ctx, in->sid_ctx_length); 
 
    as.time = in->time; 
    as.timeout = in->timeout; 
    as.verify_result = in->verify_result; 
 
    as.peer = in->peer; 
 
    ssl_session_sinit(&as.tlsext_hostname, &tlsext_hostname, 
                      in->ext.hostname); 
    if (in->ext.tick) { 
        ssl_session_oinit(&as.tlsext_tick, &tlsext_tick, 
                          in->ext.tick, in->ext.ticklen); 
    } 
    if (in->ext.tick_lifetime_hint > 0) 
        as.tlsext_tick_lifetime_hint = in->ext.tick_lifetime_hint; 
    as.tlsext_tick_age_add = in->ext.tick_age_add; 
#ifndef OPENSSL_NO_PSK 
    ssl_session_sinit(&as.psk_identity_hint, &psk_identity_hint, 
                      in->psk_identity_hint); 
    ssl_session_sinit(&as.psk_identity, &psk_identity, in->psk_identity); 
#endif                          /* OPENSSL_NO_PSK */ 
#ifndef OPENSSL_NO_SRP 
    ssl_session_sinit(&as.srp_username, &srp_username, in->srp_username); 
#endif                          /* OPENSSL_NO_SRP */ 
 
    as.flags = in->flags; 
    as.max_early_data = in->ext.max_early_data; 
 
    if (in->ext.alpn_selected == NULL) 
        as.alpn_selected = NULL; 
    else 
        ssl_session_oinit(&as.alpn_selected, &alpn_selected, 
                          in->ext.alpn_selected, in->ext.alpn_selected_len); 
 
    as.tlsext_max_fragment_len_mode = in->ext.max_fragment_len_mode; 
 
    if (in->ticket_appdata == NULL) 
        as.ticket_appdata = NULL; 
    else 
        ssl_session_oinit(&as.ticket_appdata, &ticket_appdata, 
                          in->ticket_appdata, in->ticket_appdata_len); 
 
    return i2d_SSL_SESSION_ASN1(&as, pp); 
 
} 
 
/* Utility functions for d2i_SSL_SESSION */ 
 
/* OPENSSL_strndup an OCTET STRING */ 
 
static int ssl_session_strndup(char **pdst, ASN1_OCTET_STRING *src) 
{ 
    OPENSSL_free(*pdst); 
    *pdst = NULL; 
    if (src == NULL) 
        return 1; 
    *pdst = OPENSSL_strndup((char *)src->data, src->length); 
    if (*pdst == NULL) 
        return 0; 
    return 1; 
} 
 
/* Copy an OCTET STRING, return error if it exceeds maximum length */ 
 
static int ssl_session_memcpy(unsigned char *dst, size_t *pdstlen, 
                              ASN1_OCTET_STRING *src, size_t maxlen) 
{ 
    if (src == NULL) { 
        *pdstlen = 0; 
        return 1; 
    } 
    if (src->length < 0 || src->length > (int)maxlen) 
        return 0; 
    memcpy(dst, src->data, src->length); 
    *pdstlen = src->length; 
    return 1; 
} 
 
SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp, 
                             long length) 
{ 
    long id; 
    size_t tmpl; 
    const unsigned char *p = *pp; 
    SSL_SESSION_ASN1 *as = NULL; 
    SSL_SESSION *ret = NULL; 
 
    as = d2i_SSL_SESSION_ASN1(NULL, &p, length); 
    /* ASN.1 code returns suitable error */ 
    if (as == NULL) 
        goto err; 
 
    if (!a || !*a) { 
        ret = SSL_SESSION_new(); 
        if (ret == NULL) 
            goto err; 
    } else { 
        ret = *a; 
    } 
 
    if (as->version != SSL_SESSION_ASN1_VERSION) { 
        SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_UNKNOWN_SSL_VERSION); 
        goto err; 
    } 
 
    if ((as->ssl_version >> 8) != SSL3_VERSION_MAJOR 
        && (as->ssl_version >> 8) != DTLS1_VERSION_MAJOR 
        && as->ssl_version != DTLS1_BAD_VER) { 
        SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); 
        goto err; 
    } 
 
    ret->ssl_version = (int)as->ssl_version; 
 
    if (as->cipher->length != 2) { 
        SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_CIPHER_CODE_WRONG_LENGTH); 
        goto err; 
    } 
 
    id = 0x03000000L | ((unsigned long)as->cipher->data[0] << 8L) 
                     | (unsigned long)as->cipher->data[1]; 
 
    ret->cipher_id = id; 
    ret->cipher = ssl3_get_cipher_by_id(id); 
    if (ret->cipher == NULL) 
        goto err; 
 
    if (!ssl_session_memcpy(ret->session_id, &ret->session_id_length, 
                            as->session_id, SSL3_MAX_SSL_SESSION_ID_LENGTH)) 
        goto err; 
 
    if (!ssl_session_memcpy(ret->master_key, &tmpl, 
                            as->master_key, TLS13_MAX_RESUMPTION_PSK_LENGTH)) 
        goto err; 
 
    ret->master_key_length = tmpl; 
 
    if (as->time != 0) 
        ret->time = (long)as->time; 
    else 
        ret->time = (long)time(NULL); 
 
    if (as->timeout != 0) 
        ret->timeout = (long)as->timeout; 
    else 
        ret->timeout = 3; 
 
    X509_free(ret->peer); 
    ret->peer = as->peer; 
    as->peer = NULL; 
 
    if (!ssl_session_memcpy(ret->sid_ctx, &ret->sid_ctx_length, 
                            as->session_id_context, SSL_MAX_SID_CTX_LENGTH)) 
        goto err; 
 
    /* NB: this defaults to zero which is X509_V_OK */ 
    ret->verify_result = as->verify_result; 
 
    if (!ssl_session_strndup(&ret->ext.hostname, as->tlsext_hostname)) 
        goto err; 
 
#ifndef OPENSSL_NO_PSK 
    if (!ssl_session_strndup(&ret->psk_identity_hint, as->psk_identity_hint)) 
        goto err; 
    if (!ssl_session_strndup(&ret->psk_identity, as->psk_identity)) 
        goto err; 
#endif 
 
    ret->ext.tick_lifetime_hint = (unsigned long)as->tlsext_tick_lifetime_hint; 
    ret->ext.tick_age_add = as->tlsext_tick_age_add; 
    OPENSSL_free(ret->ext.tick); 
    if (as->tlsext_tick != NULL) { 
        ret->ext.tick = as->tlsext_tick->data; 
        ret->ext.ticklen = as->tlsext_tick->length; 
        as->tlsext_tick->data = NULL; 
    } else { 
        ret->ext.tick = NULL; 
    } 
#ifndef OPENSSL_NO_COMP 
    if (as->comp_id) { 
        if (as->comp_id->length != 1) { 
            SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_BAD_LENGTH); 
            goto err; 
        } 
        ret->compress_meth = as->comp_id->data[0]; 
    } else { 
        ret->compress_meth = 0; 
    } 
#endif 
 
#ifndef OPENSSL_NO_SRP 
    if (!ssl_session_strndup(&ret->srp_username, as->srp_username)) 
        goto err; 
#endif                          /* OPENSSL_NO_SRP */ 
    /* Flags defaults to zero which is fine */ 
    ret->flags = (int32_t)as->flags; 
    ret->ext.max_early_data = as->max_early_data; 
 
    OPENSSL_free(ret->ext.alpn_selected); 
    if (as->alpn_selected != NULL) { 
        ret->ext.alpn_selected = as->alpn_selected->data; 
        ret->ext.alpn_selected_len = as->alpn_selected->length; 
        as->alpn_selected->data = NULL; 
    } else { 
        ret->ext.alpn_selected = NULL; 
        ret->ext.alpn_selected_len = 0; 
    } 
 
    ret->ext.max_fragment_len_mode = as->tlsext_max_fragment_len_mode; 
 
    OPENSSL_free(ret->ticket_appdata); 
    if (as->ticket_appdata != NULL) { 
        ret->ticket_appdata = as->ticket_appdata->data; 
        ret->ticket_appdata_len = as->ticket_appdata->length; 
        as->ticket_appdata->data = NULL; 
    } else { 
        ret->ticket_appdata = NULL; 
        ret->ticket_appdata_len = 0; 
    } 
 
    M_ASN1_free_of(as, SSL_SESSION_ASN1); 
 
    if ((a != NULL) && (*a == NULL)) 
        *a = ret; 
    *pp = p; 
    return ret; 
 
 err: 
    M_ASN1_free_of(as, SSL_SESSION_ASN1); 
    if ((a == NULL) || (*a != ret)) 
        SSL_SESSION_free(ret); 
    return NULL; 
}