[thirdparty/openssl.git] / crypto / cmp / cmp_util.c

/*
 * Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright Nokia 2007-2019
 * Copyright Siemens AG 2015-2019
 *
 * 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 <string.h>
#include <openssl/cmp_util.h>
#include "cmp_local.h" /* just for decls of internal functions defined here */
#include <openssl/cmperr.h>
#include <openssl/err.h> /* should be implied by cmperr.h */
#include <openssl/x509v3.h>

DEFINE_STACK_OF(X509)
DEFINE_STACK_OF(X509_OBJECT)
DEFINE_STACK_OF(ASN1_UTF8STRING)

/*
 * use trace API for CMP-specific logging, prefixed by "CMP " and severity
 */

int OSSL_CMP_log_open(void) /* is designed to be idempotent */
{
#ifndef OPENSSL_NO_STDIO
    BIO *bio = BIO_new_fp(stdout, BIO_NOCLOSE);

    if (bio != NULL && OSSL_trace_set_channel(OSSL_TRACE_CATEGORY_CMP, bio))
        return 1;
    BIO_free(bio);
#endif
    CMPerr(0, CMP_R_NO_STDIO);
    return 0;
}

void OSSL_CMP_log_close(void) /* is designed to be idempotent */
{
    (void)OSSL_trace_set_channel(OSSL_TRACE_CATEGORY_CMP, NULL);
}

/* return >= 0 if level contains logging level, possibly preceded by "CMP " */
#define max_level_len 5 /* = max length of the below strings, e.g., "EMERG" */
static OSSL_CMP_severity parse_level(const char *level)
{
    const char *end_level = strchr(level, ':');
    int len;
    char level_copy[max_level_len + 1];

    if (end_level == NULL)
        return -1;

    if (strncmp(level, OSSL_CMP_LOG_PREFIX,
                strlen(OSSL_CMP_LOG_PREFIX)) == 0)
        level += strlen(OSSL_CMP_LOG_PREFIX);
    len = end_level - level;
    if (len > max_level_len)
        return -1;
    OPENSSL_strlcpy(level_copy, level, len + 1);
    return
        strcmp(level_copy, "EMERG") == 0 ? OSSL_CMP_LOG_EMERG :
        strcmp(level_copy, "ALERT") == 0 ? OSSL_CMP_LOG_ALERT :
        strcmp(level_copy, "CRIT") == 0 ? OSSL_CMP_LOG_CRIT :
        strcmp(level_copy, "ERROR") == 0 ? OSSL_CMP_LOG_ERR :
        strcmp(level_copy, "WARN") == 0 ? OSSL_CMP_LOG_WARNING :
        strcmp(level_copy, "NOTE") == 0 ? OSSL_CMP_LOG_NOTICE :
        strcmp(level_copy, "INFO") == 0 ? OSSL_CMP_LOG_INFO :
        strcmp(level_copy, "DEBUG") == 0 ? OSSL_CMP_LOG_DEBUG :
        -1;
}

const char *ossl_cmp_log_parse_metadata(const char *buf,
                                        OSSL_CMP_severity *level,
                                        char **func, char **file, int *line)
{
    const char *p_func = buf;
    const char *p_file = buf == NULL ? NULL : strchr(buf, ':');
    const char *p_level = buf;
    const char *msg = buf;

    *level = -1;
    *func = NULL;
    *file = NULL;
    *line = 0;

    if (p_file != NULL) {
        const char *p_line = strchr(++p_file, ':');

        if ((*level = parse_level(buf)) < 0 && p_line != NULL) {
            /* check if buf contains location info and logging level */
            char *p_level_tmp = (char *)p_level;
            const long line_number = strtol(++p_line, &p_level_tmp, 10);

            p_level = p_level_tmp;
            if (p_level > p_line && *(p_level++) == ':') {
                if ((*level = parse_level(p_level)) >= 0) {
                    *func = OPENSSL_strndup(p_func, p_file - 1 - p_func);
                    *file = OPENSSL_strndup(p_file, p_line - 1 - p_file);
                    /* no real problem if OPENSSL_strndup() returns NULL */
                    *line = (int)line_number;
                    msg = strchr(p_level, ':') + 1;
                    if (*msg == ' ')
                        msg++;
                }
            }
        }
    }
    return msg;
}

#define UNKNOWN_FUNC "(unknown function)" /* the default for OPENSSL_FUNC */
/*
 * substitute fallback if component/function name is NULL or empty or contains
 * just pseudo-information "(unknown function)" due to -pedantic and macros.h
 */
static const char *improve_location_name(const char *func, const char *fallback)
{
    if (fallback == NULL)
        return func == NULL ? UNKNOWN_FUNC : func;

    return func == NULL || *func == '\0' || strcmp(func, UNKNOWN_FUNC) == 0
        ? fallback : func;
}

int OSSL_CMP_print_to_bio(BIO *bio, const char *component, const char *file,
                          int line, OSSL_CMP_severity level, const char *msg)
{
    const char *level_string =
        level == OSSL_CMP_LOG_EMERG ? "EMERG" :
        level == OSSL_CMP_LOG_ALERT ? "ALERT" :
        level == OSSL_CMP_LOG_CRIT ? "CRIT" :
        level == OSSL_CMP_LOG_ERR ? "error" :
        level == OSSL_CMP_LOG_WARNING ? "warning" :
        level == OSSL_CMP_LOG_NOTICE ? "NOTE" :
        level == OSSL_CMP_LOG_INFO ? "info" :
        level == OSSL_CMP_LOG_DEBUG ? "DEBUG" : "(unknown level)";

#ifndef NDEBUG
    if (BIO_printf(bio, "%s:%s:%d:", improve_location_name(component, "CMP"),
                   file, line) < 0)
        return 0;
#endif
    return BIO_printf(bio, OSSL_CMP_LOG_PREFIX"%s: %s\n",
                      level_string, msg) >= 0;
}

#define ERR_PRINT_BUF_SIZE 4096
/* this is similar to ERR_print_errors_cb, but uses the CMP-specific cb type */
void OSSL_CMP_print_errors_cb(OSSL_CMP_log_cb_t log_fn)
{
    unsigned long err;
    char msg[ERR_PRINT_BUF_SIZE];
    const char *file = NULL, *func = NULL, *data = NULL;
    int line, flags;

    while ((err = ERR_get_error_all(&file, &line, &func, &data, &flags)) != 0) {
        const char *component =
            improve_location_name(func, ERR_lib_error_string(err));

        if (!(flags & ERR_TXT_STRING))
            data = NULL;
        BIO_snprintf(msg, sizeof(msg), "%s%s%s", ERR_reason_error_string(err),
                     data == NULL || *data == '\0' ? "" : " : ",
                     data == NULL ? "" : data);
        if (log_fn == NULL) {
#ifndef OPENSSL_NO_STDIO
            BIO *bio = BIO_new_fp(stderr, BIO_NOCLOSE);

            if (bio != NULL) {
                OSSL_CMP_print_to_bio(bio, component, file, line,
                                      OSSL_CMP_LOG_ERR, msg);
                BIO_free(bio);
            }
#else
            /* CMPerr(0, CMP_R_NO_STDIO) makes no sense during error printing */
#endif
        } else {
            if (log_fn(component, file, line, OSSL_CMP_LOG_ERR, msg) <= 0)
                break; /* abort outputting the error report */
        }
    }
}

int ossl_cmp_X509_STORE_add1_certs(X509_STORE *store, STACK_OF(X509) *certs,
                                   int only_self_signed)
{
    int i;

    if (store == NULL) {
        CMPerr(0, CMP_R_NULL_ARGUMENT);
        return 0;
    }
    if (certs == NULL)
        return 1;
    for (i = 0; i < sk_X509_num(certs); i++) {
        X509 *cert = sk_X509_value(certs, i);

        if (!only_self_signed || X509_self_signed(cert, 0) == 1)
            if (!X509_STORE_add_cert(store, cert)) /* ups cert ref counter */
                return 0;
    }
    return 1;
}

/*-
 * Builds up the chain of intermediate CA certificates
 * starting from the given certificate <cert> as high up as possible using
 * the given list of candidate certificates, similarly to ssl_add_cert_chain().
 *
 * Intended use of this function is to find all the certificates above the trust
 * anchor needed to verify an EE's own certificate.  Those are supposed to be
 * included in the ExtraCerts field of every first CMP message of a transaction
 * when MSG_SIG_ALG is utilized.
 *
 * NOTE: This allocates a stack and increments the reference count of each cert,
 * so when not needed any more the stack and all its elements should be freed.
 * NOTE: In case there is more than one possibility for the chain,
 * OpenSSL seems to take the first one; check X509_verify_cert() for details.
 *
 * returns a pointer to a stack of (up_ref'ed) X509 certificates containing:
 *      - the EE certificate given in the function arguments (cert)
 *      - all intermediate certificates up the chain toward the trust anchor
 *        whereas the (self-signed) trust anchor is not included
 * returns NULL on error
 */
STACK_OF(X509)
    *ossl_cmp_build_cert_chain(OPENSSL_CTX *libctx, const char *propq,
                               STACK_OF(X509) *certs, X509 *cert)
{
    STACK_OF(X509) *chain = NULL, *result = NULL;
    X509_STORE *store = X509_STORE_new();
    X509_STORE_CTX *csc = NULL;

    if (certs == NULL || cert == NULL || store == NULL) {
        CMPerr(0, CMP_R_NULL_ARGUMENT);
        goto err;
    }

    csc = X509_STORE_CTX_new_with_libctx(libctx, propq);
    if (csc == NULL)
        goto err;

    if (!ossl_cmp_X509_STORE_add1_certs(store, certs, 0)
            || !X509_STORE_CTX_init(csc, store, cert, NULL))
        goto err;

    (void)ERR_set_mark();
    /*
     * ignore return value as it would fail without trust anchor given in store
     */
    (void)X509_verify_cert(csc);

    /* don't leave any new errors in the queue */
    (void)ERR_pop_to_mark();

    chain = X509_STORE_CTX_get0_chain(csc);

    /* result list to store the up_ref'ed not self-signed certificates */
    if ((result = sk_X509_new_null()) == NULL)
        goto err;
    if (!X509_add_certs(result, chain,
                        X509_ADD_FLAG_UP_REF | X509_ADD_FLAG_NO_DUP
                        | X509_ADD_FLAG_NO_SS)) {
        sk_X509_free(result);
        result = NULL;
    }

 err:
    X509_STORE_free(store);
    X509_STORE_CTX_free(csc);
    return result;
}

int ossl_cmp_sk_ASN1_UTF8STRING_push_str(STACK_OF(ASN1_UTF8STRING) *sk,
                                         const char *text)
{
    ASN1_UTF8STRING *utf8string;

    if (!ossl_assert(sk != NULL && text != NULL))
        return 0;
    if ((utf8string = ASN1_UTF8STRING_new()) == NULL)
        return 0;
    if (!ASN1_STRING_set(utf8string, text, -1))
        goto err;
    if (!sk_ASN1_UTF8STRING_push(sk, utf8string))
        goto err;
    return 1;

 err:
    ASN1_UTF8STRING_free(utf8string);
    return 0;
}

int ossl_cmp_asn1_octet_string_set1(ASN1_OCTET_STRING **tgt,
                                    const ASN1_OCTET_STRING *src)
{
    ASN1_OCTET_STRING *new;
    if (tgt == NULL) {
        CMPerr(0, CMP_R_NULL_ARGUMENT);
        return 0;
    }
    if (*tgt == src) /* self-assignment */
        return 1;

    if (src != NULL) {
        if ((new = ASN1_OCTET_STRING_dup(src)) == NULL)
            return 0;
    } else {
        new = NULL;
    }

    ASN1_OCTET_STRING_free(*tgt);
    *tgt = new;
    return 1;
}

int ossl_cmp_asn1_octet_string_set1_bytes(ASN1_OCTET_STRING **tgt,
                                          const unsigned char *bytes, int len)
{
    ASN1_OCTET_STRING *new = NULL;

    if (tgt == NULL) {
        CMPerr(0, CMP_R_NULL_ARGUMENT);
        return 0;
    }
    if (bytes != NULL) {
        if ((new = ASN1_OCTET_STRING_new()) == NULL
                || !(ASN1_OCTET_STRING_set(new, bytes, len))) {
            ASN1_OCTET_STRING_free(new);
            return 0;
        }
    }

    ASN1_OCTET_STRING_free(*tgt);
    *tgt = new;
    return 1;
}
Commit	Line	Data
7960dbec	1	/*
33388b44	2	* Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved.
7960dbec DDO	3	* Copyright Nokia 2007-2019
	4	* Copyright Siemens AG 2015-2019
	5	*
	6	* Licensed under the Apache License 2.0 (the "License"). You may not use
	7	* this file except in compliance with the License. You can obtain a copy
	8	* in the file LICENSE in the source distribution or at
	9	* https://www.openssl.org/source/license.html
	10	*/
	11
	12	#include <string.h>
	13	#include <openssl/cmp_util.h>
706457b7	14	#include "cmp_local.h" /* just for decls of internal functions defined here */
7960dbec DDO	15	#include <openssl/cmperr.h>
	16	#include <openssl/err.h> /* should be implied by cmperr.h */
	17	#include <openssl/x509v3.h>
	18
852c2ed2 RS	19	DEFINE_STACK_OF(X509)
	20	DEFINE_STACK_OF(X509_OBJECT)
	21	DEFINE_STACK_OF(ASN1_UTF8STRING)
	22
7960dbec DDO	23	/*
	24	* use trace API for CMP-specific logging, prefixed by "CMP " and severity
	25	*/
	26
	27	int OSSL_CMP_log_open(void) /* is designed to be idempotent */
	28	{
	29	#ifndef OPENSSL_NO_STDIO
	30	BIO *bio = BIO_new_fp(stdout, BIO_NOCLOSE);
	31
	32	if (bio != NULL && OSSL_trace_set_channel(OSSL_TRACE_CATEGORY_CMP, bio))
	33	return 1;
	34	BIO_free(bio);
	35	#endif
	36	CMPerr(0, CMP_R_NO_STDIO);
	37	return 0;
	38	}
	39
	40	void OSSL_CMP_log_close(void) /* is designed to be idempotent */
	41	{
	42	(void)OSSL_trace_set_channel(OSSL_TRACE_CATEGORY_CMP, NULL);
	43	}
	44
	45	/* return >= 0 if level contains logging level, possibly preceded by "CMP " */
	46	#define max_level_len 5 /* = max length of the below strings, e.g., "EMERG" */
	47	static OSSL_CMP_severity parse_level(const char *level)
	48	{
	49	const char *end_level = strchr(level, ':');
	50	int len;
	51	char level_copy[max_level_len + 1];
	52
	53	if (end_level == NULL)
	54	return -1;
	55
	56	if (strncmp(level, OSSL_CMP_LOG_PREFIX,
	57	strlen(OSSL_CMP_LOG_PREFIX)) == 0)
	58	level += strlen(OSSL_CMP_LOG_PREFIX);
	59	len = end_level - level;
	60	if (len > max_level_len)
	61	return -1;
	62	OPENSSL_strlcpy(level_copy, level, len + 1);
	63	return
	64	strcmp(level_copy, "EMERG") == 0 ? OSSL_CMP_LOG_EMERG :
	65	strcmp(level_copy, "ALERT") == 0 ? OSSL_CMP_LOG_ALERT :
	66	strcmp(level_copy, "CRIT") == 0 ? OSSL_CMP_LOG_CRIT :
	67	strcmp(level_copy, "ERROR") == 0 ? OSSL_CMP_LOG_ERR :
	68	strcmp(level_copy, "WARN") == 0 ? OSSL_CMP_LOG_WARNING :
	69	strcmp(level_copy, "NOTE") == 0 ? OSSL_CMP_LOG_NOTICE :
	70	strcmp(level_copy, "INFO") == 0 ? OSSL_CMP_LOG_INFO :
	71	strcmp(level_copy, "DEBUG") == 0 ? OSSL_CMP_LOG_DEBUG :
	72	-1;
	73	}
	74
	75	const char ossl_cmp_log_parse_metadata(const char buf,
ebf30069 DDO	76	OSSL_CMP_severity *level,
ebf30069 DDO	77	char func, char file, int *line)
7960dbec DDO	78	{
	79	const char *p_func = buf;
	80	const char *p_file = buf == NULL ? NULL : strchr(buf, ':');
	81	const char *p_level = buf;
	82	const char *msg = buf;
	83
	84	*level = -1;
	85	*func = NULL;
	86	*file = NULL;
	87	*line = 0;
	88
	89	if (p_file != NULL) {
	90	const char *p_line = strchr(++p_file, ':');
	91
	92	if ((*level = parse_level(buf)) < 0 && p_line != NULL) {
	93	/* check if buf contains location info and logging level */
	94	char p_level_tmp = (char )p_level;
	95	const long line_number = strtol(++p_line, &p_level_tmp, 10);
	96
	97	p_level = p_level_tmp;
	98	if (p_level > p_line && *(p_level++) == ':') {
	99	if ((*level = parse_level(p_level)) >= 0) {
	100	*func = OPENSSL_strndup(p_func, p_file - 1 - p_func);
	101	*file = OPENSSL_strndup(p_file, p_line - 1 - p_file);
	102	/* no real problem if OPENSSL_strndup() returns NULL */
	103	*line = (int)line_number;
	104	msg = strchr(p_level, ':') + 1;
	105	if (*msg == ' ')
	106	msg++;
	107	}
	108	}
	109	}
	110	}
	111	return msg;
	112	}
	113
ebf30069 DDO	114	#define UNKNOWN_FUNC "(unknown function)" /* the default for OPENSSL_FUNC */
	115	/*
	116	* substitute fallback if component/function name is NULL or empty or contains
	117	* just pseudo-information "(unknown function)" due to -pedantic and macros.h
	118	*/
	119	static const char improve_location_name(const char func, const char *fallback)
	120	{
555ed968 MC	121	if (fallback == NULL)
	122	return func == NULL ? UNKNOWN_FUNC : func;
	123
ebf30069 DDO	124	return func == NULL \|\| *func == '\0' \|\| strcmp(func, UNKNOWN_FUNC) == 0
	125	? fallback : func;
	126	}
	127
235595c4	128	int OSSL_CMP_print_to_bio(BIO bio, const char component, const char *file,
ebf30069 DDO	129	int line, OSSL_CMP_severity level, const char *msg)
	130	{
	131	const char *level_string =
	132	level == OSSL_CMP_LOG_EMERG ? "EMERG" :
	133	level == OSSL_CMP_LOG_ALERT ? "ALERT" :
	134	level == OSSL_CMP_LOG_CRIT ? "CRIT" :
	135	level == OSSL_CMP_LOG_ERR ? "error" :
	136	level == OSSL_CMP_LOG_WARNING ? "warning" :
	137	level == OSSL_CMP_LOG_NOTICE ? "NOTE" :
	138	level == OSSL_CMP_LOG_INFO ? "info" :
	139	level == OSSL_CMP_LOG_DEBUG ? "DEBUG" : "(unknown level)";
	140
	141	#ifndef NDEBUG
	142	if (BIO_printf(bio, "%s:%s:%d:", improve_location_name(component, "CMP"),
	143	file, line) < 0)
	144	return 0;
	145	#endif
	146	return BIO_printf(bio, OSSL_CMP_LOG_PREFIX"%s: %s\n",
	147	level_string, msg) >= 0;
	148	}
7960dbec	149
31b28ad9	150	#define ERR_PRINT_BUF_SIZE 4096
7960dbec	151	/* this is similar to ERR_print_errors_cb, but uses the CMP-specific cb type */
7e765f46	152	void OSSL_CMP_print_errors_cb(OSSL_CMP_log_cb_t log_fn)
7960dbec DDO	153	{
7960dbec DDO	154	unsigned long err;
31b28ad9	155	char msg[ERR_PRINT_BUF_SIZE];
7960dbec DDO	156	const char file = NULL, func = NULL, *data = NULL;
	157	int line, flags;
	158
7960dbec	159	while ((err = ERR_get_error_all(&file, &line, &func, &data, &flags)) != 0) {
ebf30069 DDO	160	const char *component =
ebf30069 DDO	161	improve_location_name(func, ERR_lib_error_string(err));
7960dbec DDO	162
	163	if (!(flags & ERR_TXT_STRING))
	164	data = NULL;
ebf30069 DDO	165	BIO_snprintf(msg, sizeof(msg), "%s%s%s", ERR_reason_error_string(err),
	166	data == NULL \|\| *data == '\0' ? "" : " : ",
	167	data == NULL ? "" : data);
	168	if (log_fn == NULL) {
	169	#ifndef OPENSSL_NO_STDIO
	170	BIO *bio = BIO_new_fp(stderr, BIO_NOCLOSE);
	171
	172	if (bio != NULL) {
	173	OSSL_CMP_print_to_bio(bio, component, file, line,
	174	OSSL_CMP_LOG_ERR, msg);
	175	BIO_free(bio);
	176	}
7960dbec	177	#else
ebf30069	178	/* CMPerr(0, CMP_R_NO_STDIO) makes no sense during error printing */
7960dbec	179	#endif
ebf30069 DDO	180	} else {
	181	if (log_fn(component, file, line, OSSL_CMP_LOG_ERR, msg) <= 0)
	182	break; /* abort outputting the error report */
	183	}
7960dbec DDO	184	}
	185	}
	186
7960dbec	187	int ossl_cmp_X509_STORE_add1_certs(X509_STORE store, STACK_OF(X509) certs,
0d8dbb52	188	int only_self_signed)
7960dbec DDO	189	{
	190	int i;
	191
	192	if (store == NULL) {
	193	CMPerr(0, CMP_R_NULL_ARGUMENT);
	194	return 0;
	195	}
	196	if (certs == NULL)
	197	return 1;
	198	for (i = 0; i < sk_X509_num(certs); i++) {
	199	X509 *cert = sk_X509_value(certs, i);
	200
0d8dbb52	201	if (!only_self_signed \|\| X509_self_signed(cert, 0) == 1)
7960dbec DDO	202	if (!X509_STORE_add_cert(store, cert)) /* ups cert ref counter */
	203	return 0;
	204	}
	205	return 1;
	206	}
	207
7960dbec	208	/*-
28e9f62b	209	* Builds up the chain of intermediate CA certificates
6d1f50b5	210	* starting from the given certificate <cert> as high up as possible using
28e9f62b	211	* the given list of candidate certificates, similarly to ssl_add_cert_chain().
7960dbec DDO	212	*
	213	* Intended use of this function is to find all the certificates above the trust
	214	* anchor needed to verify an EE's own certificate. Those are supposed to be
28e9f62b	215	* included in the ExtraCerts field of every first CMP message of a transaction
7960dbec DDO	216	* when MSG_SIG_ALG is utilized.
	217	*
	218	* NOTE: This allocates a stack and increments the reference count of each cert,
	219	* so when not needed any more the stack and all its elements should be freed.
28e9f62b DDO	220	* NOTE: In case there is more than one possibility for the chain,
28e9f62b DDO	221	* OpenSSL seems to take the first one; check X509_verify_cert() for details.
7960dbec DDO	222	*
	223	* returns a pointer to a stack of (up_ref'ed) X509 certificates containing:
	224	* - the EE certificate given in the function arguments (cert)
	225	* - all intermediate certificates up the chain toward the trust anchor
	226	* whereas the (self-signed) trust anchor is not included
	227	* returns NULL on error
	228	*/
28e9f62b DDO	229	STACK_OF(X509)
	230	ossl_cmp_build_cert_chain(OPENSSL_CTX libctx, const char *propq,
	231	STACK_OF(X509) certs, X509 cert)
7960dbec DDO	232	{
	233	STACK_OF(X509) chain = NULL, result = NULL;
	234	X509_STORE *store = X509_STORE_new();
	235	X509_STORE_CTX *csc = NULL;
	236
	237	if (certs == NULL \|\| cert == NULL \|\| store == NULL) {
	238	CMPerr(0, CMP_R_NULL_ARGUMENT);
	239	goto err;
	240	}
	241
28e9f62b	242	csc = X509_STORE_CTX_new_with_libctx(libctx, propq);
7960dbec DDO	243	if (csc == NULL)
	244	goto err;
	245
	246	if (!ossl_cmp_X509_STORE_add1_certs(store, certs, 0)
	247	\|\| !X509_STORE_CTX_init(csc, store, cert, NULL))
	248	goto err;
	249
	250	(void)ERR_set_mark();
	251	/*
	252	* ignore return value as it would fail without trust anchor given in store
	253	*/
	254	(void)X509_verify_cert(csc);
	255
	256	/* don't leave any new errors in the queue */
	257	(void)ERR_pop_to_mark();
	258
	259	chain = X509_STORE_CTX_get0_chain(csc);
	260
eeccc237	261	/* result list to store the up_ref'ed not self-signed certificates */
7960dbec DDO	262	if ((result = sk_X509_new_null()) == NULL)
7960dbec DDO	263	goto err;
eeccc237 DDO	264	if (!X509_add_certs(result, chain,
	265	X509_ADD_FLAG_UP_REF \| X509_ADD_FLAG_NO_DUP
	266	\| X509_ADD_FLAG_NO_SS)) {
7960dbec DDO	267	sk_X509_free(result);
	268	result = NULL;
	269	}
	270
	271	err:
	272	X509_STORE_free(store);
	273	X509_STORE_CTX_free(csc);
	274	return result;
	275	}
	276
62dcd2aa DDO	277	int ossl_cmp_sk_ASN1_UTF8STRING_push_str(STACK_OF(ASN1_UTF8STRING) *sk,
	278	const char *text)
	279	{
	280	ASN1_UTF8STRING *utf8string;
	281
	282	if (!ossl_assert(sk != NULL && text != NULL))
	283	return 0;
	284	if ((utf8string = ASN1_UTF8STRING_new()) == NULL)
	285	return 0;
	286	if (!ASN1_STRING_set(utf8string, text, -1))
	287	goto err;
	288	if (!sk_ASN1_UTF8STRING_push(sk, utf8string))
	289	goto err;
	290	return 1;
	291
	292	err:
	293	ASN1_UTF8STRING_free(utf8string);
	294	return 0;
	295	}
	296
7960dbec DDO	297	int ossl_cmp_asn1_octet_string_set1(ASN1_OCTET_STRING **tgt,
	298	const ASN1_OCTET_STRING *src)
	299	{
59ae04d7	300	ASN1_OCTET_STRING *new;
7960dbec DDO	301	if (tgt == NULL) {
	302	CMPerr(0, CMP_R_NULL_ARGUMENT);
	303	return 0;
	304	}
	305	if (tgt == src) / self-assignment */
	306	return 1;
7960dbec DDO	307
7960dbec DDO	308	if (src != NULL) {
59ae04d7	309	if ((new = ASN1_OCTET_STRING_dup(src)) == NULL)
7960dbec DDO	310	return 0;
7960dbec DDO	311	} else {
59ae04d7	312	new = NULL;
7960dbec DDO	313	}
7960dbec DDO	314
59ae04d7	315	ASN1_OCTET_STRING_free(*tgt);
59ae04d7	316	*tgt = new;
7960dbec DDO	317	return 1;
	318	}
	319
	320	int ossl_cmp_asn1_octet_string_set1_bytes(ASN1_OCTET_STRING **tgt,
	321	const unsigned char *bytes, int len)
	322	{
	323	ASN1_OCTET_STRING *new = NULL;
	324
	325	if (tgt == NULL) {
	326	CMPerr(0, CMP_R_NULL_ARGUMENT);
	327	return 0;
	328	}
	329	if (bytes != NULL) {
ebf30069	330	if ((new = ASN1_OCTET_STRING_new()) == NULL
7960dbec DDO	331	\|\| !(ASN1_OCTET_STRING_set(new, bytes, len))) {
	332	ASN1_OCTET_STRING_free(new);
	333	return 0;
	334	}
	335	}
	336
	337	ASN1_OCTET_STRING_free(*tgt);
	338	*tgt = new;
	339	return 1;
	340	}