/src/openssl41/crypto/pkcs12/p12_mutl.c

Source
/*
 * Copyright 1999-2026 The OpenSSL Project Authors. 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
 */

/*
 * HMAC low level APIs are deprecated for public use, but still ok for internal
 * use.
 */
#include "internal/deprecated.h"

#include <stdio.h>
#include "internal/cryptlib.h"
#include "crypto/evp.h"
#include <openssl/crypto.h>
#include <openssl/hmac.h>
#include <openssl/rand.h>
#include <openssl/pkcs12.h>
#include "p12_local.h"

#include <crypto/asn1.h>

static int pkcs12_pbmac1_pbkdf2_key_gen(const char *pass, int passlen,
    unsigned char *salt, int saltlen,
    int id, int iter, int keylen,
    unsigned char *out,
    const EVP_MD *md_type,
    OSSL_LIB_CTX *libctx, const char *propq);

int PKCS12_mac_present(const PKCS12 *p12)
{
    return p12->mac ? 1 : 0;
}

void PKCS12_get0_mac(const ASN1_OCTET_STRING **pmac,
    const X509_ALGOR **pmacalg,
    const ASN1_OCTET_STRING **psalt,
    const ASN1_INTEGER **piter,
    const PKCS12 *p12)
{
    if (p12->mac) {
        X509_SIG_get0(p12->mac->dinfo, pmacalg, pmac);
        if (psalt)
            *psalt = p12->mac->salt;
        if (piter)
            *piter = p12->mac->iter;
    } else {
        if (pmac)
            *pmac = NULL;
        if (pmacalg)
            *pmacalg = NULL;
        if (psalt)
            *psalt = NULL;
        if (piter)
            *piter = NULL;
    }
}

#define TK26_MAC_KEY_LEN 32

static int pkcs12_gen_gost_mac_key(const char *pass, int passlen,
    const unsigned char *salt, int saltlen,
    int iter, int keylen, unsigned char *key,
    const EVP_MD *digest)
{
    unsigned char out[96];

    if (keylen != TK26_MAC_KEY_LEN) {
        return 0;
    }

    if (!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter,
            digest, sizeof(out), out)) {
        return 0;
    }
    memcpy(key, out + sizeof(out) - TK26_MAC_KEY_LEN, TK26_MAC_KEY_LEN);
    OPENSSL_cleanse(out, sizeof(out));
    return 1;
}

PBKDF2PARAM *PBMAC1_get1_pbkdf2_param(const X509_ALGOR *macalg)
{
    PBMAC1PARAM *param = NULL;
    PBKDF2PARAM *pbkdf2_param = NULL;
    const ASN1_OBJECT *kdf_oid;

    param = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBMAC1PARAM), macalg->parameter);
    if (param == NULL) {
        ERR_raise(ERR_LIB_PKCS12, ERR_R_PASSED_INVALID_ARGUMENT);
        return NULL;
    }

    X509_ALGOR_get0(&kdf_oid, NULL, NULL, param->keyDerivationFunc);
    if (OBJ_obj2nid(kdf_oid) != NID_id_pbkdf2) {
        ERR_raise(ERR_LIB_PKCS12, ERR_R_PASSED_INVALID_ARGUMENT);
        PBMAC1PARAM_free(param);
        return NULL;
    }

    pbkdf2_param = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBKDF2PARAM),
        param->keyDerivationFunc->parameter);
    PBMAC1PARAM_free(param);

    return pbkdf2_param;
}

static int PBMAC1_PBKDF2_HMAC(OSSL_LIB_CTX *ctx, const char *propq,
    const char *pass, int passlen,
    const X509_ALGOR *macalg, unsigned char *key)
{
    PBKDF2PARAM *pbkdf2_param = NULL;
    const ASN1_OBJECT *kdf_hmac_oid;
    int kdf_hmac_nid;
    int ret = -1;
    int keylen = 0;
    EVP_MD *kdf_md = NULL;
    const ASN1_OCTET_STRING *pbkdf2_salt = NULL;

    pbkdf2_param = PBMAC1_get1_pbkdf2_param(macalg);
    if (pbkdf2_param == NULL) {
        ERR_raise(ERR_LIB_PKCS12, ERR_R_UNSUPPORTED);
        goto err;
    }

    if (pbkdf2_param->prf == NULL) {
        kdf_hmac_nid = NID_hmacWithSHA1;
    } else {
        X509_ALGOR_get0(&kdf_hmac_oid, NULL, NULL, pbkdf2_param->prf);
        kdf_hmac_nid = OBJ_obj2nid(kdf_hmac_oid);
    }

    kdf_md = EVP_MD_fetch(ctx, OBJ_nid2sn(ossl_hmac2mdnid(kdf_hmac_nid)), propq);
    if (kdf_md == NULL) {
        ERR_raise(ERR_LIB_PKCS12, ERR_R_FETCH_FAILED);
        goto err;
    }

    /* Validate salt is an OCTET STRING choice */
    if (pbkdf2_param->salt == NULL
        || pbkdf2_param->salt->type != V_ASN1_OCTET_STRING) {
        ERR_raise_data(ERR_LIB_PKCS12, PKCS12_R_PARSE_ERROR, "Invalid Salt");
        goto err;
    }
    pbkdf2_salt = pbkdf2_param->salt->value.octet_string;

    /* RFC 9879 specifies missing key length as invalid */
    if (pbkdf2_param->keylength != NULL)
        keylen = ASN1_INTEGER_get(pbkdf2_param->keylength);
    /* RFC 9879 specifies too short key length as untrustworthy too */
    if (keylen < 20 || keylen > EVP_MAX_MD_SIZE) {
        ERR_raise_data(ERR_LIB_PKCS12, PKCS12_R_PARSE_ERROR,
            "Invalid Key length (%d is not in the range 20..64)", keylen);
        goto err;
    }

    if (PKCS5_PBKDF2_HMAC(pass, passlen, pbkdf2_salt->data, pbkdf2_salt->length,
            ASN1_INTEGER_get(pbkdf2_param->iter), kdf_md, keylen, key)
        <= 0) {
        ERR_raise(ERR_LIB_PKCS12, ERR_R_INTERNAL_ERROR);
        goto err;
    }
    ret = keylen;

err:
    EVP_MD_free(kdf_md);
    PBKDF2PARAM_free(pbkdf2_param);

    return ret;
}

/* Generate a MAC, also used for verification */
static int pkcs12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
    unsigned char *mac, unsigned int *maclen,
    int pbmac1_md_nid, int pbmac1_kdf_nid,
    int (*pkcs12_key_gen)(const char *pass, int passlen,
        unsigned char *salt, int slen,
        int id, int iter, int n,
        unsigned char *out,
        const EVP_MD *md_type,
        OSSL_LIB_CTX *libctx,
        const char *propq))
{
    int ret = 0;
    EVP_MD *md;
    unsigned char key[EVP_MAX_MD_SIZE], *salt;
    int saltlen, iter;
    char md_name[80];
    int keylen = 0;
    int md_nid = NID_undef;
    const X509_ALGOR *macalg;
    const ASN1_OBJECT *macoid;
    OSSL_LIB_CTX *libctx;
    const char *propq;
    size_t md_sz, outlen;

    if (!PKCS7_type_is_data(p12->authsafes)) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_CONTENT_TYPE_NOT_DATA);
        return 0;
    }

    if (p12->authsafes->d.data == NULL) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_DECODE_ERROR);
        return 0;
    }

    libctx = p12->authsafes->ctx.libctx;
    propq = p12->authsafes->ctx.propq;
    salt = p12->mac->salt->data;
    saltlen = p12->mac->salt->length;
    if (p12->mac->iter == NULL)
        iter = 1;
    else
        iter = ASN1_INTEGER_get(p12->mac->iter);
    X509_SIG_get0(p12->mac->dinfo, &macalg, NULL);
    X509_ALGOR_get0(&macoid, NULL, NULL, macalg);
    if (OBJ_obj2nid(macoid) == NID_pbmac1) {
        if (OBJ_obj2txt(md_name, sizeof(md_name), OBJ_nid2obj(pbmac1_md_nid), 0) < 0)
            return 0;
    } else {
        if (OBJ_obj2txt(md_name, sizeof(md_name), macoid, 0) < 0)
            return 0;
    }
    md = EVP_MD_fetch(libctx, md_name, propq);

    if (md == NULL) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
        return 0;
    }

    keylen = EVP_MD_get_size(md);
    md_nid = EVP_MD_get_type(md);
    if (keylen <= 0)
        goto err;
    md_sz = keylen;

    /* For PBMAC1 we use a special keygen callback if not provided (e.g. on verification) */
    if (pbmac1_md_nid != NID_undef && pkcs12_key_gen == NULL) {
        keylen = PBMAC1_PBKDF2_HMAC(libctx, propq, pass, passlen, macalg, key);
        if (keylen < 0)
            goto err;
    } else if ((md_nid == NID_id_GostR3411_94
                   || md_nid == NID_id_GostR3411_2012_256
                   || md_nid == NID_id_GostR3411_2012_512)
        && ossl_safe_getenv("LEGACY_GOST_PKCS12") == NULL) {
        keylen = TK26_MAC_KEY_LEN;
        if (!pkcs12_gen_gost_mac_key(pass, passlen, salt, saltlen, iter,
                keylen, key, md)) {
            ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
            goto err;
        }
    } else {
        EVP_MD *hmac_md = md;
        int fetched = 0;

        if (pbmac1_kdf_nid != NID_undef) {
            char hmac_md_name[128];

            if (OBJ_obj2txt(hmac_md_name, sizeof(hmac_md_name), OBJ_nid2obj(pbmac1_kdf_nid), 0) < 0)
                goto err;
            hmac_md = EVP_MD_fetch(libctx, hmac_md_name, propq);
            if (hmac_md == NULL)
                goto err;
            fetched = 1;
        }
        if (pkcs12_key_gen != NULL) {
            int res = (*pkcs12_key_gen)(pass, passlen, salt, saltlen, PKCS12_MAC_ID,
                iter, keylen, key, hmac_md, libctx, propq);

            if (fetched)
                EVP_MD_free(hmac_md);
            if (res != 1) {
                ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
                goto err;
            }
        } else {
            if (fetched)
                EVP_MD_free(hmac_md);
            /* Default to UTF-8 password */
            if (!PKCS12_key_gen_utf8_ex(pass, passlen, salt, saltlen, PKCS12_MAC_ID,
                    iter, keylen, key, md, libctx, propq)) {
                ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
                goto err;
            }
        }
    }
    if (EVP_Q_mac(libctx, "HMAC", propq, md_name, NULL, key, keylen,
            p12->authsafes->d.data->data, p12->authsafes->d.data->length,
            mac, md_sz, &outlen)
        == NULL)
        goto err;
    if (outlen > UINT_MAX)
        goto err;
    *maclen = (unsigned int)outlen;
    ret = 1;
err:
    OPENSSL_cleanse(key, sizeof(key));
    EVP_MD_free(md);
    return ret;
}

int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
    unsigned char *mac, unsigned int *maclen)
{
    return pkcs12_gen_mac(p12, pass, passlen, mac, maclen, NID_undef, NID_undef, NULL);
}

/* Verify the mac */
int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
{
    unsigned char mac[EVP_MAX_MD_SIZE];
    unsigned int maclen;
    const ASN1_OCTET_STRING *macoct;
    const X509_ALGOR *macalg;
    const ASN1_OBJECT *macoid;

    if (p12->mac == NULL) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_ABSENT);
        return 0;
    }

    X509_SIG_get0(p12->mac->dinfo, &macalg, NULL);
    X509_ALGOR_get0(&macoid, NULL, NULL, macalg);
    if (OBJ_obj2nid(macoid) == NID_pbmac1) {
        PBMAC1PARAM *param = NULL;
        const ASN1_OBJECT *hmac_oid;
        int md_nid = NID_undef;

        param = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBMAC1PARAM), macalg->parameter);
        if (param == NULL) {
            ERR_raise(ERR_LIB_PKCS12, ERR_R_UNSUPPORTED);
            return 0;
        }
        X509_ALGOR_get0(&hmac_oid, NULL, NULL, param->messageAuthScheme);
        md_nid = ossl_hmac2mdnid(OBJ_obj2nid(hmac_oid));

        if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, md_nid, NID_undef, NULL)) {
            ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
            PBMAC1PARAM_free(param);
            return 0;
        }
        PBMAC1PARAM_free(param);
    } else {
        if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, NID_undef, NID_undef, NULL)) {
            ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
            return 0;
        }
    }
    X509_SIG_get0(p12->mac->dinfo, NULL, &macoct);
    if ((maclen != ASN1_STRING_get_length(macoct))
        || CRYPTO_memcmp(mac, ASN1_STRING_get0_data(macoct), maclen) != 0)
        return 0;

    return 1;
}

/* Set a mac */
int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
    unsigned char *salt, int saltlen, int iter,
    const EVP_MD *md_type)
{
    unsigned char mac[EVP_MAX_MD_SIZE];
    unsigned int maclen;
    ASN1_OCTET_STRING *macoct;

    if (md_type == NULL)
        /* No need to do a fetch as the md_type is used only to get a NID */
        md_type = EVP_sha256();
    if (!iter)
        iter = PKCS12_DEFAULT_ITER;
    if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_SETUP_ERROR);
        return 0;
    }
    /*
     * Note that output mac is forced to UTF-8...
     */
    if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, NID_undef, NID_undef, NULL)) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
        return 0;
    }
    X509_SIG_getm(p12->mac->dinfo, NULL, &macoct);
    if (!ASN1_OCTET_STRING_set(macoct, mac, maclen)) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_STRING_SET_ERROR);
        return 0;
    }
    return 1;
}

static int pkcs12_pbmac1_pbkdf2_key_gen(const char *pass, int passlen,
    unsigned char *salt, int saltlen,
    int id, int iter, int keylen,
    unsigned char *out,
    const EVP_MD *md_type,
    OSSL_LIB_CTX *libctx, const char *propq)
{
    return ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, salt, saltlen, iter, md_type,
        keylen, out, libctx, propq);
}

static int pkcs12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
    int nid)
{
    X509_ALGOR *macalg;

    PKCS12_MAC_DATA_free(p12->mac);
    p12->mac = NULL;

    if ((p12->mac = PKCS12_MAC_DATA_new()) == NULL)
        return PKCS12_ERROR;
    if (iter > 1) {
        if ((p12->mac->iter = ASN1_INTEGER_new()) == NULL) {
            ERR_raise(ERR_LIB_PKCS12, ERR_R_ASN1_LIB);
            return 0;
        }
        if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
            ERR_raise(ERR_LIB_PKCS12, ERR_R_ASN1_LIB);
            return 0;
        }
    }
    if (saltlen == 0)
        saltlen = PKCS12_SALT_LEN;
    else if (saltlen < 0)
        return 0;
    if ((p12->mac->salt->data = OPENSSL_malloc(saltlen)) == NULL)
        return 0;
    p12->mac->salt->length = saltlen;
    if (salt == NULL) {
        if (RAND_bytes_ex(p12->authsafes->ctx.libctx, p12->mac->salt->data,
                (size_t)saltlen, 0)
            <= 0)
            return 0;
    } else {
        memcpy(p12->mac->salt->data, salt, saltlen);
    }
    X509_SIG_getm(p12->mac->dinfo, &macalg, NULL);
    if (!X509_ALGOR_set0(macalg, OBJ_nid2obj(nid), V_ASN1_NULL, NULL)) {
        ERR_raise(ERR_LIB_PKCS12, ERR_R_ASN1_LIB);
        return 0;
    }

    return 1;
}

/* Set up a mac structure */
int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
    const EVP_MD *md_type)
{
    return pkcs12_setup_mac(p12, iter, salt, saltlen, EVP_MD_get_type(md_type));
}

int PKCS12_set_pbmac1_pbkdf2(PKCS12 *p12, const char *pass, int passlen,
    unsigned char *salt, int saltlen, int iter,
    const EVP_MD *md_type, const char *prf_md_name)
{
    unsigned char mac[EVP_MAX_MD_SIZE];
    unsigned int maclen;
    ASN1_OCTET_STRING *macoct;
    X509_ALGOR *alg = NULL;
    int ret = 0;
    int prf_md_nid = NID_undef, prf_nid = NID_undef, hmac_nid;
    unsigned char *known_salt = NULL;
    int keylen = 0;
    PBMAC1PARAM *param = NULL;
    X509_ALGOR *hmac_alg = NULL, *macalg = NULL;
    OSSL_LIB_CTX *libctx = p12->authsafes->ctx.libctx;

    if (md_type == NULL)
        /* No need to do a fetch as the md_type is used only to get a NID */
        md_type = EVP_sha256();

    if (prf_md_name == NULL)
        prf_md_nid = EVP_MD_get_type(md_type);
    else
        prf_md_nid = OBJ_txt2nid(prf_md_name);

    if (iter == 0)
        iter = PKCS12_DEFAULT_ITER;

    keylen = EVP_MD_get_size(md_type);

    prf_nid = ossl_md2hmacnid(prf_md_nid);
    hmac_nid = ossl_md2hmacnid(EVP_MD_get_type(md_type));

    if (prf_nid == NID_undef || hmac_nid == NID_undef) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
        goto err;
    }

    if (salt == NULL) {
        if (saltlen < 0) {
            ERR_raise(ERR_LIB_PKCS12, PKCS12_R_INVALID_SALT_LENGTH);
            goto err;
        }
        if (saltlen > 0) {
            known_salt = OPENSSL_malloc(saltlen);
            if (known_salt == NULL)
                goto err;

            if (RAND_bytes_ex(libctx, known_salt, saltlen, 0) <= 0) {
                ERR_raise(ERR_LIB_PKCS12, ERR_R_RAND_LIB);
                goto err;
            }
        }
    }

    param = PBMAC1PARAM_new();
    hmac_alg = X509_ALGOR_new();
    alg = PKCS5_pbkdf2_set_ex(iter, salt ? salt : known_salt, saltlen,
        prf_nid, keylen, libctx);
    if (param == NULL || hmac_alg == NULL || alg == NULL)
        goto err;

    if (pkcs12_setup_mac(p12, iter, salt ? salt : known_salt, saltlen,
            NID_pbmac1)
        == PKCS12_ERROR) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_SETUP_ERROR);
        goto err;
    }

    if (!X509_ALGOR_set0(hmac_alg, OBJ_nid2obj(hmac_nid), V_ASN1_NULL, NULL)) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_SETUP_ERROR);
        goto err;
    }

    X509_ALGOR_free(param->keyDerivationFunc);
    X509_ALGOR_free(param->messageAuthScheme);
    param->keyDerivationFunc = alg;
    param->messageAuthScheme = hmac_alg;
    alg = NULL;
    hmac_alg = NULL;

    X509_SIG_getm(p12->mac->dinfo, &macalg, &macoct);
    if (!ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(PBMAC1PARAM), param, &macalg->parameter))
        goto err;

    /*
     * Note that output mac is forced to UTF-8...
     */
    if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen,
            EVP_MD_get_type(md_type), prf_md_nid,
            pkcs12_pbmac1_pbkdf2_key_gen)) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
        goto err;
    }
    if (!ASN1_OCTET_STRING_set(macoct, mac, maclen)) {
        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_STRING_SET_ERROR);
        goto err;
    }
    ret = 1;

err:
    X509_ALGOR_free(alg);
    X509_ALGOR_free(hmac_alg);
    PBMAC1PARAM_free(param);
    OPENSSL_free(known_salt);
    return ret;
}

Coverage Report

Created: 2026-09-12 06:55

Line	Count	Source
1		/*
2		* Copyright 1999-2026 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		/*
11		* HMAC low level APIs are deprecated for public use, but still ok for internal
12		* use.
13		*/
14		#include "internal/deprecated.h"
15
16		#include <stdio.h>
17		#include "internal/cryptlib.h"
18		#include "crypto/evp.h"
19		#include <openssl/crypto.h>
20		#include <openssl/hmac.h>
21		#include <openssl/rand.h>
22		#include <openssl/pkcs12.h>
23		#include "p12_local.h"
24
25		#include <crypto/asn1.h>
26
27		static int pkcs12_pbmac1_pbkdf2_key_gen(const char *pass, int passlen,
28		unsigned char *salt, int saltlen,
29		int id, int iter, int keylen,
30		unsigned char *out,
31		const EVP_MD *md_type,
32		OSSL_LIB_CTX libctx, const char propq);
33
34		int PKCS12_mac_present(const PKCS12 *p12)
35	5.31k	{
36	5.31k	return p12->mac ? 1 : 0;
37	5.31k	}
38
39		void PKCS12_get0_mac(const ASN1_OCTET_STRING **pmac,
40		const X509_ALGOR **pmacalg,
41		const ASN1_OCTET_STRING **psalt,
42		const ASN1_INTEGER **piter,
43		const PKCS12 *p12)
44	0	{
45	0	if (p12->mac) {
46	0	X509_SIG_get0(p12->mac->dinfo, pmacalg, pmac);
47	0	if (psalt)
48	0	*psalt = p12->mac->salt;
49	0	if (piter)
50	0	*piter = p12->mac->iter;
51	0	} else {
52	0	if (pmac)
53	0	*pmac = NULL;
54	0	if (pmacalg)
55	0	*pmacalg = NULL;
56	0	if (psalt)
57	0	*psalt = NULL;
58	0	if (piter)
59	0	*piter = NULL;
60	0	}
61	0	}
62
63	0	#define TK26_MAC_KEY_LEN 32
64
65		static int pkcs12_gen_gost_mac_key(const char *pass, int passlen,
66		const unsigned char *salt, int saltlen,
67		int iter, int keylen, unsigned char *key,
68		const EVP_MD *digest)
69	0	{
70	0	unsigned char out[96];
71
72	0	if (keylen != TK26_MAC_KEY_LEN) {
73	0	return 0;
74	0	}
75
76	0	if (!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter,
77	0	digest, sizeof(out), out)) {
78	0	return 0;
79	0	}
80	0	memcpy(key, out + sizeof(out) - TK26_MAC_KEY_LEN, TK26_MAC_KEY_LEN);
81	0	OPENSSL_cleanse(out, sizeof(out));
82	0	return 1;
83	0	}
84
85		PBKDF2PARAM PBMAC1_get1_pbkdf2_param(const X509_ALGOR macalg)
86	590	{
87	590	PBMAC1PARAM *param = NULL;
88	590	PBKDF2PARAM *pbkdf2_param = NULL;
89	590	const ASN1_OBJECT *kdf_oid;
90
91	590	param = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBMAC1PARAM), macalg->parameter);
92	590	if (param == NULL) {
93	0	ERR_raise(ERR_LIB_PKCS12, ERR_R_PASSED_INVALID_ARGUMENT);
94	0	return NULL;
95	0	}
96
97	590	X509_ALGOR_get0(&kdf_oid, NULL, NULL, param->keyDerivationFunc);
98	590	if (OBJ_obj2nid(kdf_oid) != NID_id_pbkdf2) {
99	78	ERR_raise(ERR_LIB_PKCS12, ERR_R_PASSED_INVALID_ARGUMENT);
100	78	PBMAC1PARAM_free(param);
101	78	return NULL;
102	78	}
103
104	512	pbkdf2_param = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBKDF2PARAM),
105	512	param->keyDerivationFunc->parameter);
106	512	PBMAC1PARAM_free(param);
107
108	512	return pbkdf2_param;
109	590	}
110
111		static int PBMAC1_PBKDF2_HMAC(OSSL_LIB_CTX ctx, const char propq,
112		const char *pass, int passlen,
113		const X509_ALGOR macalg, unsigned char key)
114	590	{
115	590	PBKDF2PARAM *pbkdf2_param = NULL;
116	590	const ASN1_OBJECT *kdf_hmac_oid;
117	590	int kdf_hmac_nid;
118	590	int ret = -1;
119	590	int keylen = 0;
120	590	EVP_MD *kdf_md = NULL;
121	590	const ASN1_OCTET_STRING *pbkdf2_salt = NULL;
122
123	590	pbkdf2_param = PBMAC1_get1_pbkdf2_param(macalg);
124	590	if (pbkdf2_param == NULL) {
125	180	ERR_raise(ERR_LIB_PKCS12, ERR_R_UNSUPPORTED);
126	180	goto err;
127	180	}
128
129	410	if (pbkdf2_param->prf == NULL) {
130	116	kdf_hmac_nid = NID_hmacWithSHA1;
131	294	} else {
132	294	X509_ALGOR_get0(&kdf_hmac_oid, NULL, NULL, pbkdf2_param->prf);
133	294	kdf_hmac_nid = OBJ_obj2nid(kdf_hmac_oid);
134	294	}
135
136	410	kdf_md = EVP_MD_fetch(ctx, OBJ_nid2sn(ossl_hmac2mdnid(kdf_hmac_nid)), propq);
137	410	if (kdf_md == NULL) {
138	24	ERR_raise(ERR_LIB_PKCS12, ERR_R_FETCH_FAILED);
139	24	goto err;
140	24	}
141
142		/* Validate salt is an OCTET STRING choice */
143	386	if (pbkdf2_param->salt == NULL
144	386	\|\| pbkdf2_param->salt->type != V_ASN1_OCTET_STRING) {
145	36	ERR_raise_data(ERR_LIB_PKCS12, PKCS12_R_PARSE_ERROR, "Invalid Salt");
146	36	goto err;
147	36	}
148	350	pbkdf2_salt = pbkdf2_param->salt->value.octet_string;
149
150		/* RFC 9879 specifies missing key length as invalid */
151	350	if (pbkdf2_param->keylength != NULL)
152	326	keylen = ASN1_INTEGER_get(pbkdf2_param->keylength);
153		/* RFC 9879 specifies too short key length as untrustworthy too */
154	350	if (keylen < 20 \|\| keylen > EVP_MAX_MD_SIZE) {
155	90	ERR_raise_data(ERR_LIB_PKCS12, PKCS12_R_PARSE_ERROR,
156	90	"Invalid Key length (%d is not in the range 20..64)", keylen);
157	90	goto err;
158	90	}
159
160	260	if (PKCS5_PBKDF2_HMAC(pass, passlen, pbkdf2_salt->data, pbkdf2_salt->length,
161	260	ASN1_INTEGER_get(pbkdf2_param->iter), kdf_md, keylen, key)
162	260	<= 0) {
163	30	ERR_raise(ERR_LIB_PKCS12, ERR_R_INTERNAL_ERROR);
164	30	goto err;
165	30	}
166	230	ret = keylen;
167
168	590	err:
169	590	EVP_MD_free(kdf_md);
170	590	PBKDF2PARAM_free(pbkdf2_param);
171
172	590	return ret;
173	230	}
174
175		/* Generate a MAC, also used for verification */
176		static int pkcs12_gen_mac(PKCS12 p12, const char pass, int passlen,
177		unsigned char mac, unsigned int maclen,
178		int pbmac1_md_nid, int pbmac1_kdf_nid,
179		int (pkcs12_key_gen)(const char pass, int passlen,
180		unsigned char *salt, int slen,
181		int id, int iter, int n,
182		unsigned char *out,
183		const EVP_MD *md_type,
184		OSSL_LIB_CTX *libctx,
185		const char *propq))
186	8.09k	{
187	8.09k	int ret = 0;
188	8.09k	EVP_MD *md;
189	8.09k	unsigned char key[EVP_MAX_MD_SIZE], *salt;
190	8.09k	int saltlen, iter;
191	8.09k	char md_name[80];
192	8.09k	int keylen = 0;
193	8.09k	int md_nid = NID_undef;
194	8.09k	const X509_ALGOR *macalg;
195	8.09k	const ASN1_OBJECT *macoid;
196	8.09k	OSSL_LIB_CTX *libctx;
197	8.09k	const char *propq;
198	8.09k	size_t md_sz, outlen;
199
200	8.09k	if (!PKCS7_type_is_data(p12->authsafes)) {
201	84	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_CONTENT_TYPE_NOT_DATA);
202	84	return 0;
203	84	}
204
205	8.01k	if (p12->authsafes->d.data == NULL) {
206	18	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_DECODE_ERROR);
207	18	return 0;
208	18	}
209
210	7.99k	libctx = p12->authsafes->ctx.libctx;
211	7.99k	propq = p12->authsafes->ctx.propq;
212	7.99k	salt = p12->mac->salt->data;
213	7.99k	saltlen = p12->mac->salt->length;
214	7.99k	if (p12->mac->iter == NULL)
215	844	iter = 1;
216	7.14k	else
217	7.14k	iter = ASN1_INTEGER_get(p12->mac->iter);
218	7.99k	X509_SIG_get0(p12->mac->dinfo, &macalg, NULL);
219	7.99k	X509_ALGOR_get0(&macoid, NULL, NULL, macalg);
220	7.99k	if (OBJ_obj2nid(macoid) == NID_pbmac1) {
221	614	if (OBJ_obj2txt(md_name, sizeof(md_name), OBJ_nid2obj(pbmac1_md_nid), 0) < 0)
222	0	return 0;
223	7.37k	} else {
224	7.37k	if (OBJ_obj2txt(md_name, sizeof(md_name), macoid, 0) < 0)
225	0	return 0;
226	7.37k	}
227	7.99k	md = EVP_MD_fetch(libctx, md_name, propq);
228
229	7.99k	if (md == NULL) {
230	4.56k	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
231	4.56k	return 0;
232	4.56k	}
233
234	3.42k	keylen = EVP_MD_get_size(md);
235	3.42k	md_nid = EVP_MD_get_type(md);
236	3.42k	if (keylen <= 0)
237	36	goto err;
238	3.39k	md_sz = keylen;
239
240		/* For PBMAC1 we use a special keygen callback if not provided (e.g. on verification) */
241	3.39k	if (pbmac1_md_nid != NID_undef && pkcs12_key_gen == NULL) {
242	590	keylen = PBMAC1_PBKDF2_HMAC(libctx, propq, pass, passlen, macalg, key);
243	590	if (keylen < 0)
244	360	goto err;
245	2.80k	} else if ((md_nid == NID_id_GostR3411_94
246	2.80k	\|\| md_nid == NID_id_GostR3411_2012_256
247	2.80k	\|\| md_nid == NID_id_GostR3411_2012_512)
248	0	&& ossl_safe_getenv("LEGACY_GOST_PKCS12") == NULL) {
249	0	keylen = TK26_MAC_KEY_LEN;
250	0	if (!pkcs12_gen_gost_mac_key(pass, passlen, salt, saltlen, iter,
251	0	keylen, key, md)) {
252	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
253	0	goto err;
254	0	}
255	2.80k	} else {
256	2.80k	EVP_MD *hmac_md = md;
257	2.80k	int fetched = 0;
258
259	2.80k	if (pbmac1_kdf_nid != NID_undef) {
260	0	char hmac_md_name[128];
261
262	0	if (OBJ_obj2txt(hmac_md_name, sizeof(hmac_md_name), OBJ_nid2obj(pbmac1_kdf_nid), 0) < 0)
263	0	goto err;
264	0	hmac_md = EVP_MD_fetch(libctx, hmac_md_name, propq);
265	0	if (hmac_md == NULL)
266	0	goto err;
267	0	fetched = 1;
268	0	}
269	2.80k	if (pkcs12_key_gen != NULL) {
270	0	int res = (*pkcs12_key_gen)(pass, passlen, salt, saltlen, PKCS12_MAC_ID,
271	0	iter, keylen, key, hmac_md, libctx, propq);
272
273	0	if (fetched)
274	0	EVP_MD_free(hmac_md);
275	0	if (res != 1) {
276	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
277	0	goto err;
278	0	}
279	2.80k	} else {
280	2.80k	if (fetched)
281	0	EVP_MD_free(hmac_md);
282		/* Default to UTF-8 password */
283	2.80k	if (!PKCS12_key_gen_utf8_ex(pass, passlen, salt, saltlen, PKCS12_MAC_ID,
284	2.80k	iter, keylen, key, md, libctx, propq)) {
285	885	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
286	885	goto err;
287	885	}
288	2.80k	}
289	2.80k	}
290	2.14k	if (EVP_Q_mac(libctx, "HMAC", propq, md_name, NULL, key, keylen,
291	2.14k	p12->authsafes->d.data->data, p12->authsafes->d.data->length,
292	2.14k	mac, md_sz, &outlen)
293	2.14k	== NULL)
294	0	goto err;
295	2.14k	if (outlen > UINT_MAX)
296	0	goto err;
297	2.14k	*maclen = (unsigned int)outlen;
298	2.14k	ret = 1;
299	3.42k	err:
300	3.42k	OPENSSL_cleanse(key, sizeof(key));
301	3.42k	EVP_MD_free(md);
302	3.42k	return ret;
303	2.14k	}
304
305		int PKCS12_gen_mac(PKCS12 p12, const char pass, int passlen,
306		unsigned char mac, unsigned int maclen)
307	0	{
308	0	return pkcs12_gen_mac(p12, pass, passlen, mac, maclen, NID_undef, NID_undef, NULL);
309	0	}
310
311		/* Verify the mac */
312		int PKCS12_verify_mac(PKCS12 p12, const char pass, int passlen)
313	10.9k	{
314	10.9k	unsigned char mac[EVP_MAX_MD_SIZE];
315	10.9k	unsigned int maclen;
316	10.9k	const ASN1_OCTET_STRING *macoct;
317	10.9k	const X509_ALGOR *macalg;
318	10.9k	const ASN1_OBJECT *macoid;
319
320	10.9k	if (p12->mac == NULL) {
321	2.50k	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_ABSENT);
322	2.50k	return 0;
323	2.50k	}
324
325	8.40k	X509_SIG_get0(p12->mac->dinfo, &macalg, NULL);
326	8.40k	X509_ALGOR_get0(&macoid, NULL, NULL, macalg);
327	8.40k	if (OBJ_obj2nid(macoid) == NID_pbmac1) {
328	926	PBMAC1PARAM *param = NULL;
329	926	const ASN1_OBJECT *hmac_oid;
330	926	int md_nid = NID_undef;
331
332	926	param = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBMAC1PARAM), macalg->parameter);
333	926	if (param == NULL) {
334	312	ERR_raise(ERR_LIB_PKCS12, ERR_R_UNSUPPORTED);
335	312	return 0;
336	312	}
337	614	X509_ALGOR_get0(&hmac_oid, NULL, NULL, param->messageAuthScheme);
338	614	md_nid = ossl_hmac2mdnid(OBJ_obj2nid(hmac_oid));
339
340	614	if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, md_nid, NID_undef, NULL)) {
341	384	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
342	384	PBMAC1PARAM_free(param);
343	384	return 0;
344	384	}
345	230	PBMAC1PARAM_free(param);
346	7.48k	} else {
347	7.48k	if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, NID_undef, NID_undef, NULL)) {
348	5.56k	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
349	5.56k	return 0;
350	5.56k	}
351	7.48k	}
352	2.14k	X509_SIG_get0(p12->mac->dinfo, NULL, &macoct);
353	2.14k	if ((maclen != ASN1_STRING_get_length(macoct))
354	1.19k	\|\| CRYPTO_memcmp(mac, ASN1_STRING_get0_data(macoct), maclen) != 0)
355	2.06k	return 0;
356
357	80	return 1;
358	2.14k	}
359
360		/* Set a mac */
361		int PKCS12_set_mac(PKCS12 p12, const char pass, int passlen,
362		unsigned char *salt, int saltlen, int iter,
363		const EVP_MD *md_type)
364	0	{
365	0	unsigned char mac[EVP_MAX_MD_SIZE];
366	0	unsigned int maclen;
367	0	ASN1_OCTET_STRING *macoct;
368
369	0	if (md_type == NULL)
370		/* No need to do a fetch as the md_type is used only to get a NID */
371	0	md_type = EVP_sha256();
372	0	if (!iter)
373	0	iter = PKCS12_DEFAULT_ITER;
374	0	if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) {
375	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_SETUP_ERROR);
376	0	return 0;
377	0	}
378		/*
379		* Note that output mac is forced to UTF-8...
380		*/
381	0	if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, NID_undef, NID_undef, NULL)) {
382	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
383	0	return 0;
384	0	}
385	0	X509_SIG_getm(p12->mac->dinfo, NULL, &macoct);
386	0	if (!ASN1_OCTET_STRING_set(macoct, mac, maclen)) {
387	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_STRING_SET_ERROR);
388	0	return 0;
389	0	}
390	0	return 1;
391	0	}
392
393		static int pkcs12_pbmac1_pbkdf2_key_gen(const char *pass, int passlen,
394		unsigned char *salt, int saltlen,
395		int id, int iter, int keylen,
396		unsigned char *out,
397		const EVP_MD *md_type,
398		OSSL_LIB_CTX libctx, const char propq)
399	0	{
400	0	return ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, salt, saltlen, iter, md_type,
401	0	keylen, out, libctx, propq);
402	0	}
403
404		static int pkcs12_setup_mac(PKCS12 p12, int iter, unsigned char salt, int saltlen,
405		int nid)
406	0	{
407	0	X509_ALGOR *macalg;
408
409	0	PKCS12_MAC_DATA_free(p12->mac);
410	0	p12->mac = NULL;
411
412	0	if ((p12->mac = PKCS12_MAC_DATA_new()) == NULL)
413	0	return PKCS12_ERROR;
414	0	if (iter > 1) {
415	0	if ((p12->mac->iter = ASN1_INTEGER_new()) == NULL) {
416	0	ERR_raise(ERR_LIB_PKCS12, ERR_R_ASN1_LIB);
417	0	return 0;
418	0	}
419	0	if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
420	0	ERR_raise(ERR_LIB_PKCS12, ERR_R_ASN1_LIB);
421	0	return 0;
422	0	}
423	0	}
424	0	if (saltlen == 0)
425	0	saltlen = PKCS12_SALT_LEN;
426	0	else if (saltlen < 0)
427	0	return 0;
428	0	if ((p12->mac->salt->data = OPENSSL_malloc(saltlen)) == NULL)
429	0	return 0;
430	0	p12->mac->salt->length = saltlen;
431	0	if (salt == NULL) {
432	0	if (RAND_bytes_ex(p12->authsafes->ctx.libctx, p12->mac->salt->data,
433	0	(size_t)saltlen, 0)
434	0	<= 0)
435	0	return 0;
436	0	} else {
437	0	memcpy(p12->mac->salt->data, salt, saltlen);
438	0	}
439	0	X509_SIG_getm(p12->mac->dinfo, &macalg, NULL);
440	0	if (!X509_ALGOR_set0(macalg, OBJ_nid2obj(nid), V_ASN1_NULL, NULL)) {
441	0	ERR_raise(ERR_LIB_PKCS12, ERR_R_ASN1_LIB);
442	0	return 0;
443	0	}
444
445	0	return 1;
446	0	}
447
448		/* Set up a mac structure */
449		int PKCS12_setup_mac(PKCS12 p12, int iter, unsigned char salt, int saltlen,
450		const EVP_MD *md_type)
451	0	{
452	0	return pkcs12_setup_mac(p12, iter, salt, saltlen, EVP_MD_get_type(md_type));
453	0	}
454
455		int PKCS12_set_pbmac1_pbkdf2(PKCS12 p12, const char pass, int passlen,
456		unsigned char *salt, int saltlen, int iter,
457		const EVP_MD md_type, const char prf_md_name)
458	0	{
459	0	unsigned char mac[EVP_MAX_MD_SIZE];
460	0	unsigned int maclen;
461	0	ASN1_OCTET_STRING *macoct;
462	0	X509_ALGOR *alg = NULL;
463	0	int ret = 0;
464	0	int prf_md_nid = NID_undef, prf_nid = NID_undef, hmac_nid;
465	0	unsigned char *known_salt = NULL;
466	0	int keylen = 0;
467	0	PBMAC1PARAM *param = NULL;
468	0	X509_ALGOR hmac_alg = NULL, macalg = NULL;
469	0	OSSL_LIB_CTX *libctx = p12->authsafes->ctx.libctx;
470
471	0	if (md_type == NULL)
472		/* No need to do a fetch as the md_type is used only to get a NID */
473	0	md_type = EVP_sha256();
474
475	0	if (prf_md_name == NULL)
476	0	prf_md_nid = EVP_MD_get_type(md_type);
477	0	else
478	0	prf_md_nid = OBJ_txt2nid(prf_md_name);
479
480	0	if (iter == 0)
481	0	iter = PKCS12_DEFAULT_ITER;
482
483	0	keylen = EVP_MD_get_size(md_type);
484
485	0	prf_nid = ossl_md2hmacnid(prf_md_nid);
486	0	hmac_nid = ossl_md2hmacnid(EVP_MD_get_type(md_type));
487
488	0	if (prf_nid == NID_undef \|\| hmac_nid == NID_undef) {
489	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
490	0	goto err;
491	0	}
492
493	0	if (salt == NULL) {
494	0	if (saltlen < 0) {
495	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_INVALID_SALT_LENGTH);
496	0	goto err;
497	0	}
498	0	if (saltlen > 0) {
499	0	known_salt = OPENSSL_malloc(saltlen);
500	0	if (known_salt == NULL)
501	0	goto err;
502
503	0	if (RAND_bytes_ex(libctx, known_salt, saltlen, 0) <= 0) {
504	0	ERR_raise(ERR_LIB_PKCS12, ERR_R_RAND_LIB);
505	0	goto err;
506	0	}
507	0	}
508	0	}
509
510	0	param = PBMAC1PARAM_new();
511	0	hmac_alg = X509_ALGOR_new();
512	0	alg = PKCS5_pbkdf2_set_ex(iter, salt ? salt : known_salt, saltlen,
513	0	prf_nid, keylen, libctx);
514	0	if (param == NULL \|\| hmac_alg == NULL \|\| alg == NULL)
515	0	goto err;
516
517	0	if (pkcs12_setup_mac(p12, iter, salt ? salt : known_salt, saltlen,
518	0	NID_pbmac1)
519	0	== PKCS12_ERROR) {
520	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_SETUP_ERROR);
521	0	goto err;
522	0	}
523
524	0	if (!X509_ALGOR_set0(hmac_alg, OBJ_nid2obj(hmac_nid), V_ASN1_NULL, NULL)) {
525	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_SETUP_ERROR);
526	0	goto err;
527	0	}
528
529	0	X509_ALGOR_free(param->keyDerivationFunc);
530	0	X509_ALGOR_free(param->messageAuthScheme);
531	0	param->keyDerivationFunc = alg;
532	0	param->messageAuthScheme = hmac_alg;
533	0	alg = NULL;
534	0	hmac_alg = NULL;
535
536	0	X509_SIG_getm(p12->mac->dinfo, &macalg, &macoct);
537	0	if (!ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(PBMAC1PARAM), param, &macalg->parameter))
538	0	goto err;
539
540		/*
541		* Note that output mac is forced to UTF-8...
542		*/
543	0	if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen,
544	0	EVP_MD_get_type(md_type), prf_md_nid,
545	0	pkcs12_pbmac1_pbkdf2_key_gen)) {
546	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
547	0	goto err;
548	0	}
549	0	if (!ASN1_OCTET_STRING_set(macoct, mac, maclen)) {
550	0	ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_STRING_SET_ERROR);
551	0	goto err;
552	0	}
553	0	ret = 1;
554
555	0	err:
556	0	X509_ALGOR_free(alg);
557	0	X509_ALGOR_free(hmac_alg);
558	0	PBMAC1PARAM_free(param);
559	0	OPENSSL_free(known_salt);
560	0	return ret;
561	0	}