/src/openssl32/crypto/pkcs7/pk7_lib.c

Source (jump to first uncovered line)
/*
 * Copyright 1995-2023 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
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/pkcs7.h>
#include "crypto/asn1.h"
#include "crypto/evp.h"
#include "crypto/x509.h" /* for sk_X509_add1_cert() */
#include "pk7_local.h"

long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
{
    int nid;
    long ret;

    nid = OBJ_obj2nid(p7->type);

    switch (cmd) {
    /* NOTE(emilia): does not support detached digested data. */
    case PKCS7_OP_SET_DETACHED_SIGNATURE:
        if (nid == NID_pkcs7_signed) {
            if (p7->d.sign == NULL) {
                ERR_raise(ERR_LIB_PKCS7, PKCS7_R_NO_CONTENT);
                ret = 0;
                break;
            }
            ret = p7->detached = (int)larg;
            if (ret && PKCS7_type_is_data(p7->d.sign->contents)) {
                ASN1_OCTET_STRING *os;
                os = p7->d.sign->contents->d.data;
                ASN1_OCTET_STRING_free(os);
                p7->d.sign->contents->d.data = NULL;
            }
        } else {
            ERR_raise(ERR_LIB_PKCS7,
                      PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
            ret = 0;
        }
        break;
    case PKCS7_OP_GET_DETACHED_SIGNATURE:
        if (nid == NID_pkcs7_signed) {
            if (p7->d.sign == NULL || p7->d.sign->contents->d.ptr == NULL)
                ret = 1;
            else
                ret = 0;

            p7->detached = ret;
        } else {
            ERR_raise(ERR_LIB_PKCS7,
                      PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
            ret = 0;
        }

        break;
    default:
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNKNOWN_OPERATION);
        ret = 0;
    }
    return ret;
}

int PKCS7_content_new(PKCS7 *p7, int type)
{
    PKCS7 *ret = NULL;

    if ((ret = PKCS7_new()) == NULL)
        goto err;
    if (!PKCS7_set_type(ret, type))
        goto err;
    if (!PKCS7_set_content(p7, ret))
        goto err;

    return 1;
 err:
    PKCS7_free(ret);
    return 0;
}

int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
{
    int i;

    i = OBJ_obj2nid(p7->type);
    switch (i) {
    case NID_pkcs7_signed:
        PKCS7_free(p7->d.sign->contents);
        p7->d.sign->contents = p7_data;
        break;
    case NID_pkcs7_digest:
        PKCS7_free(p7->d.digest->contents);
        p7->d.digest->contents = p7_data;
        break;
    case NID_pkcs7_data:
    case NID_pkcs7_enveloped:
    case NID_pkcs7_signedAndEnveloped:
    case NID_pkcs7_encrypted:
    default:
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
        goto err;
    }
    return 1;
 err:
    return 0;
}

int PKCS7_set_type(PKCS7 *p7, int type)
{
    ASN1_OBJECT *obj;

    /*
     * PKCS7_content_free(p7);
     */
    obj = OBJ_nid2obj(type);    /* will not fail */

    switch (type) {
    case NID_pkcs7_signed:
        p7->type = obj;
        if ((p7->d.sign = PKCS7_SIGNED_new()) == NULL)
            goto err;
        if (!ASN1_INTEGER_set(p7->d.sign->version, 1)) {
            PKCS7_SIGNED_free(p7->d.sign);
            p7->d.sign = NULL;
            goto err;
        }
        break;
    case NID_pkcs7_data:
        p7->type = obj;
        if ((p7->d.data = ASN1_OCTET_STRING_new()) == NULL)
            goto err;
        break;
    case NID_pkcs7_signedAndEnveloped:
        p7->type = obj;
        if ((p7->d.signed_and_enveloped = PKCS7_SIGN_ENVELOPE_new())
            == NULL)
            goto err;
        if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1))
            goto err;
        p7->d.signed_and_enveloped->enc_data->content_type
            = OBJ_nid2obj(NID_pkcs7_data);
        break;
    case NID_pkcs7_enveloped:
        p7->type = obj;
        if ((p7->d.enveloped = PKCS7_ENVELOPE_new())
            == NULL)
            goto err;
        if (!ASN1_INTEGER_set(p7->d.enveloped->version, 0))
            goto err;
        p7->d.enveloped->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
        break;
    case NID_pkcs7_encrypted:
        p7->type = obj;
        if ((p7->d.encrypted = PKCS7_ENCRYPT_new())
            == NULL)
            goto err;
        if (!ASN1_INTEGER_set(p7->d.encrypted->version, 0))
            goto err;
        p7->d.encrypted->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
        break;

    case NID_pkcs7_digest:
        p7->type = obj;
        if ((p7->d.digest = PKCS7_DIGEST_new())
            == NULL)
            goto err;
        if (!ASN1_INTEGER_set(p7->d.digest->version, 0))
            goto err;
        break;
    default:
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
        goto err;
    }
    return 1;
 err:
    return 0;
}

int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
{
    p7->type = OBJ_nid2obj(type);
    p7->d.other = other;
    return 1;
}

int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
{
    int i, j;
    ASN1_OBJECT *obj;
    X509_ALGOR *alg;
    STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
    STACK_OF(X509_ALGOR) *md_sk;

    i = OBJ_obj2nid(p7->type);
    switch (i) {
    case NID_pkcs7_signed:
        signer_sk = p7->d.sign->signer_info;
        md_sk = p7->d.sign->md_algs;
        break;
    case NID_pkcs7_signedAndEnveloped:
        signer_sk = p7->d.signed_and_enveloped->signer_info;
        md_sk = p7->d.signed_and_enveloped->md_algs;
        break;
    default:
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
        return 0;
    }

    obj = psi->digest_alg->algorithm;
    /* If the digest is not currently listed, add it */
    j = 0;
    for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
        alg = sk_X509_ALGOR_value(md_sk, i);
        if (OBJ_cmp(obj, alg->algorithm) == 0) {
            j = 1;
            break;
        }
    }
    if (!j) {                   /* we need to add another algorithm */
        int nid;

        if ((alg = X509_ALGOR_new()) == NULL
            || (alg->parameter = ASN1_TYPE_new()) == NULL) {
            X509_ALGOR_free(alg);
            ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
            return 0;
        }
        /*
         * If there is a constant copy of the ASN1 OBJECT in libcrypto, then
         * use that.  Otherwise, use a dynamically duplicated copy
         */
        if ((nid = OBJ_obj2nid(obj)) != NID_undef)
            alg->algorithm = OBJ_nid2obj(nid);
        else
            alg->algorithm = OBJ_dup(obj);
        alg->parameter->type = V_ASN1_NULL;
        if (alg->algorithm == NULL || !sk_X509_ALGOR_push(md_sk, alg)) {
            X509_ALGOR_free(alg);
            return 0;
        }
    }

    psi->ctx = ossl_pkcs7_get0_ctx(p7);
    if (!sk_PKCS7_SIGNER_INFO_push(signer_sk, psi))
        return 0;
    return 1;
}

int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
{
    int i;
    STACK_OF(X509) **sk;

    i = OBJ_obj2nid(p7->type);
    switch (i) {
    case NID_pkcs7_signed:
        sk = &(p7->d.sign->cert);
        break;
    case NID_pkcs7_signedAndEnveloped:
        sk = &(p7->d.signed_and_enveloped->cert);
        break;
    default:
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
        return 0;
    }

    return ossl_x509_add_cert_new(sk, x509, X509_ADD_FLAG_UP_REF);
}

int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
{
    int i;
    STACK_OF(X509_CRL) **sk;

    i = OBJ_obj2nid(p7->type);
    switch (i) {
    case NID_pkcs7_signed:
        sk = &(p7->d.sign->crl);
        break;
    case NID_pkcs7_signedAndEnveloped:
        sk = &(p7->d.signed_and_enveloped->crl);
        break;
    default:
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
        return 0;
    }

    if (*sk == NULL)
        *sk = sk_X509_CRL_new_null();
    if (*sk == NULL) {
        ERR_raise(ERR_LIB_PKCS7, ERR_R_CRYPTO_LIB);
        return 0;
    }

    X509_CRL_up_ref(crl);
    if (!sk_X509_CRL_push(*sk, crl)) {
        X509_CRL_free(crl);
        return 0;
    }
    return 1;
}

static int pkcs7_ecdsa_or_dsa_sign_verify_setup(PKCS7_SIGNER_INFO *si,
                                                int verify)
{
    if (!verify) {
        int snid, hnid;
        X509_ALGOR *alg1, *alg2;
        EVP_PKEY *pkey = si->pkey;

        PKCS7_SIGNER_INFO_get0_algs(si, NULL, &alg1, &alg2);
        if (alg1 == NULL || alg1->algorithm == NULL)
            return -1;
        hnid = OBJ_obj2nid(alg1->algorithm);
        if (hnid == NID_undef)
            return -1;
        if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_get_id(pkey)))
            return -1;
        return X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, NULL);
    }
    return 1;
}

static int pkcs7_rsa_sign_verify_setup(PKCS7_SIGNER_INFO *si, int verify)
{
    if (!verify) {
        X509_ALGOR *alg = NULL;

        PKCS7_SIGNER_INFO_get0_algs(si, NULL, NULL, &alg);
        if (alg != NULL)
            return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
                                   V_ASN1_NULL, NULL);
    }
    return 1;
}

int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
                          const EVP_MD *dgst)
{
    int ret;

    /* We now need to add another PKCS7_SIGNER_INFO entry */
    if (!ASN1_INTEGER_set(p7i->version, 1))
        return 0;
    if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
                       X509_get_issuer_name(x509)))
        return 0;

    /*
     * because ASN1_INTEGER_set is used to set a 'long' we will do things the
     * ugly way.
     */
    ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
    if (!(p7i->issuer_and_serial->serial =
          ASN1_INTEGER_dup(X509_get0_serialNumber(x509))))
        return 0;

    /* lets keep the pkey around for a while */
    EVP_PKEY_up_ref(pkey);
    p7i->pkey = pkey;

    /* Set the algorithms */

    if (!X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_get_type(dgst)),
                         V_ASN1_NULL, NULL))
        return 0;

    if (EVP_PKEY_is_a(pkey, "EC") || EVP_PKEY_is_a(pkey, "DSA"))
        return pkcs7_ecdsa_or_dsa_sign_verify_setup(p7i, 0);
    if (EVP_PKEY_is_a(pkey, "RSA"))
        return pkcs7_rsa_sign_verify_setup(p7i, 0);

    if (pkey->ameth != NULL && pkey->ameth->pkey_ctrl != NULL) {
        ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN, 0, p7i);
        if (ret > 0)
            return 1;
        if (ret != -2) {
            ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_CTRL_FAILURE);
            return 0;
        }
    }
    ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
    return 0;
}

PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
                                       const EVP_MD *dgst)
{
    PKCS7_SIGNER_INFO *si = NULL;

    if (dgst == NULL) {
        int def_nid;
        if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) <= 0)
            goto err;
        dgst = EVP_get_digestbynid(def_nid);
        if (dgst == NULL) {
            ERR_raise(ERR_LIB_PKCS7, PKCS7_R_NO_DEFAULT_DIGEST);
            goto err;
        }
    }

    if ((si = PKCS7_SIGNER_INFO_new()) == NULL)
        goto err;
    if (PKCS7_SIGNER_INFO_set(si, x509, pkey, dgst) <= 0)
        goto err;
    if (!PKCS7_add_signer(p7, si))
        goto err;
    return si;
 err:
    PKCS7_SIGNER_INFO_free(si);
    return NULL;
}

static STACK_OF(X509) *pkcs7_get_signer_certs(const PKCS7 *p7)
{
    if (p7->d.ptr == NULL)
        return NULL;
    if (PKCS7_type_is_signed(p7))
        return p7->d.sign->cert;
    if (PKCS7_type_is_signedAndEnveloped(p7))
        return p7->d.signed_and_enveloped->cert;
    return NULL;
}

static STACK_OF(PKCS7_RECIP_INFO) *pkcs7_get_recipient_info(const PKCS7 *p7)
{
    if (p7->d.ptr == NULL)
        return NULL;
    if (PKCS7_type_is_signedAndEnveloped(p7))
        return p7->d.signed_and_enveloped->recipientinfo;
    if (PKCS7_type_is_enveloped(p7))
        return p7->d.enveloped->recipientinfo;
    return NULL;
}

/*
 * Set up the library context into any loaded structure that needs it.
 * i.e loaded X509 objects.
 */
void ossl_pkcs7_resolve_libctx(PKCS7 *p7)
{
    int i;
    const PKCS7_CTX *ctx = ossl_pkcs7_get0_ctx(p7);
    OSSL_LIB_CTX *libctx = ossl_pkcs7_ctx_get0_libctx(ctx);
    const char *propq = ossl_pkcs7_ctx_get0_propq(ctx);
    STACK_OF(PKCS7_RECIP_INFO) *rinfos;
    STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
    STACK_OF(X509) *certs;

    if (ctx == NULL || p7->d.ptr == NULL)
        return;

    rinfos = pkcs7_get_recipient_info(p7);
    sinfos = PKCS7_get_signer_info(p7);
    certs = pkcs7_get_signer_certs(p7);

    for (i = 0; i < sk_X509_num(certs); i++)
        ossl_x509_set0_libctx(sk_X509_value(certs, i), libctx, propq);

    for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rinfos); i++) {
        PKCS7_RECIP_INFO *ri = sk_PKCS7_RECIP_INFO_value(rinfos, i);

        ossl_x509_set0_libctx(ri->cert, libctx, propq);
    }

    for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
        PKCS7_SIGNER_INFO *si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);

        if (si != NULL)
            si->ctx = ctx;
    }
}

const PKCS7_CTX *ossl_pkcs7_get0_ctx(const PKCS7 *p7)
{
    return p7 != NULL ? &p7->ctx : NULL;
}

void ossl_pkcs7_set0_libctx(PKCS7 *p7, OSSL_LIB_CTX *ctx)
{
    p7->ctx.libctx = ctx;
}

int ossl_pkcs7_set1_propq(PKCS7 *p7, const char *propq)
{
    if (p7->ctx.propq != NULL) {
        OPENSSL_free(p7->ctx.propq);
        p7->ctx.propq = NULL;
    }
    if (propq != NULL) {
        p7->ctx.propq = OPENSSL_strdup(propq);
        if (p7->ctx.propq == NULL)
            return 0;
    }
    return 1;
}

int ossl_pkcs7_ctx_propagate(const PKCS7 *from, PKCS7 *to)
{
    ossl_pkcs7_set0_libctx(to, from->ctx.libctx);
    if (!ossl_pkcs7_set1_propq(to, from->ctx.propq))
        return 0;

    ossl_pkcs7_resolve_libctx(to);
    return 1;
}

OSSL_LIB_CTX *ossl_pkcs7_ctx_get0_libctx(const PKCS7_CTX *ctx)
{
    return ctx != NULL ? ctx->libctx : NULL;
}
const char *ossl_pkcs7_ctx_get0_propq(const PKCS7_CTX *ctx)
{
    return ctx != NULL ? ctx->propq : NULL;
}

int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
{
    if (PKCS7_type_is_digest(p7)) {
        if ((p7->d.digest->md->parameter = ASN1_TYPE_new()) == NULL) {
            ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
            return 0;
        }
        p7->d.digest->md->parameter->type = V_ASN1_NULL;
        p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
        return 1;
    }

    ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
    return 1;
}

STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
{
    if (p7 == NULL || p7->d.ptr == NULL)
        return NULL;
    if (PKCS7_type_is_signed(p7)) {
        return p7->d.sign->signer_info;
    } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
        return p7->d.signed_and_enveloped->signer_info;
    } else
        return NULL;
}

void PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO *si, EVP_PKEY **pk,
                                 X509_ALGOR **pdig, X509_ALGOR **psig)
{
    if (pk)
        *pk = si->pkey;
    if (pdig)
        *pdig = si->digest_alg;
    if (psig)
        *psig = si->digest_enc_alg;
}

void PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO *ri, X509_ALGOR **penc)
{
    if (penc)
        *penc = ri->key_enc_algor;
}

PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
{
    PKCS7_RECIP_INFO *ri;

    if ((ri = PKCS7_RECIP_INFO_new()) == NULL)
        goto err;
    if (PKCS7_RECIP_INFO_set(ri, x509) <= 0)
        goto err;
    if (!PKCS7_add_recipient_info(p7, ri))
        goto err;
    ri->ctx = ossl_pkcs7_get0_ctx(p7);
    return ri;
 err:
    PKCS7_RECIP_INFO_free(ri);
    return NULL;
}

int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
{
    int i;
    STACK_OF(PKCS7_RECIP_INFO) *sk;

    i = OBJ_obj2nid(p7->type);
    switch (i) {
    case NID_pkcs7_signedAndEnveloped:
        sk = p7->d.signed_and_enveloped->recipientinfo;
        break;
    case NID_pkcs7_enveloped:
        sk = p7->d.enveloped->recipientinfo;
        break;
    default:
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
        return 0;
    }

    if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
        return 0;
    return 1;
}

static int pkcs7_rsa_encrypt_decrypt_setup(PKCS7_RECIP_INFO *ri, int decrypt)
{
    X509_ALGOR *alg = NULL;

    if (!decrypt) {
        PKCS7_RECIP_INFO_get0_alg(ri, &alg);
        if (alg != NULL)
            return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
                                   V_ASN1_NULL, NULL);
    }
    return 1;
}

int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
{
    int ret;
    EVP_PKEY *pkey = NULL;
    if (!ASN1_INTEGER_set(p7i->version, 0))
        return 0;
    if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
                       X509_get_issuer_name(x509)))
        return 0;

    ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
    if (!(p7i->issuer_and_serial->serial =
          ASN1_INTEGER_dup(X509_get0_serialNumber(x509))))
        return 0;

    pkey = X509_get0_pubkey(x509);
    if (pkey == NULL)
        return 0;

    if (EVP_PKEY_is_a(pkey, "RSA-PSS"))
        return -2;
    if (EVP_PKEY_is_a(pkey, "RSA")) {
        if (pkcs7_rsa_encrypt_decrypt_setup(p7i, 0) <= 0)
            goto err;
        goto finished;
    }

    if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL) {
        ERR_raise(ERR_LIB_PKCS7,
                  PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
        goto err;
    }

    ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_ENCRYPT, 0, p7i);
    if (ret == -2) {
        ERR_raise(ERR_LIB_PKCS7,
                  PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
        goto err;
    }
    if (ret <= 0) {
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_ENCRYPTION_CTRL_FAILURE);
        goto err;
    }
finished:
    X509_up_ref(x509);
    p7i->cert = x509;

    return 1;

 err:
    return 0;
}

X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
{
    if (PKCS7_type_is_signed(p7))
        return (X509_find_by_issuer_and_serial(p7->d.sign->cert,
                                               si->issuer_and_serial->issuer,
                                               si->
                                               issuer_and_serial->serial));
    else
        return NULL;
}

int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
{
    int i;
    PKCS7_ENC_CONTENT *ec;

    i = OBJ_obj2nid(p7->type);
    switch (i) {
    case NID_pkcs7_signedAndEnveloped:
        ec = p7->d.signed_and_enveloped->enc_data;
        break;
    case NID_pkcs7_enveloped:
        ec = p7->d.enveloped->enc_data;
        break;
    default:
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
        return 0;
    }

    /* Check cipher OID exists and has data in it */
    i = EVP_CIPHER_get_type(cipher);
    if (i == NID_undef) {
        ERR_raise(ERR_LIB_PKCS7, PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
        return 0;
    }

    ec->cipher = cipher;
    ec->ctx = ossl_pkcs7_get0_ctx(p7);
    return 1;
}

/* unfortunately cannot constify BIO_new_NDEF() due to this and CMS_stream() */
int PKCS7_stream(unsigned char ***boundary, PKCS7 *p7)
{
    ASN1_OCTET_STRING *os = NULL;

    switch (OBJ_obj2nid(p7->type)) {
    case NID_pkcs7_data:
        os = p7->d.data;
        break;

    case NID_pkcs7_signedAndEnveloped:
        os = p7->d.signed_and_enveloped->enc_data->enc_data;
        if (os == NULL) {
            os = ASN1_OCTET_STRING_new();
            p7->d.signed_and_enveloped->enc_data->enc_data = os;
        }
        break;

    case NID_pkcs7_enveloped:
        os = p7->d.enveloped->enc_data->enc_data;
        if (os == NULL) {
            os = ASN1_OCTET_STRING_new();
            p7->d.enveloped->enc_data->enc_data = os;
        }
        break;

    case NID_pkcs7_signed:
        os = p7->d.sign->contents->d.data;
        break;

    default:
        os = NULL;
        break;
    }

    if (os == NULL)
        return 0;

    os->flags |= ASN1_STRING_FLAG_NDEF;
    *boundary = &os->data;

    return 1;
}

Coverage Report

Created: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1995-2023 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		#include <stdio.h>
11		#include "internal/cryptlib.h"
12		#include <openssl/objects.h>
13		#include <openssl/x509.h>
14		#include <openssl/pkcs7.h>
15		#include "crypto/asn1.h"
16		#include "crypto/evp.h"
17		#include "crypto/x509.h" /* for sk_X509_add1_cert() */
18		#include "pk7_local.h"
19
20		long PKCS7_ctrl(PKCS7 p7, int cmd, long larg, char parg)
21	12	{
22	12	int nid;
23	12	long ret;
24
25	12	nid = OBJ_obj2nid(p7->type);
26
27	12	switch (cmd) {
28		/* NOTE(emilia): does not support detached digested data. */
29	0	case PKCS7_OP_SET_DETACHED_SIGNATURE:
30	0	if (nid == NID_pkcs7_signed) {
31	0	if (p7->d.sign == NULL) {
32	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_NO_CONTENT);
33	0	ret = 0;
34	0	break;
35	0	}
36	0	ret = p7->detached = (int)larg;
37	0	if (ret && PKCS7_type_is_data(p7->d.sign->contents)) {
38	0	ASN1_OCTET_STRING *os;
39	0	os = p7->d.sign->contents->d.data;
40	0	ASN1_OCTET_STRING_free(os);
41	0	p7->d.sign->contents->d.data = NULL;
42	0	}
43	0	} else {
44	0	ERR_raise(ERR_LIB_PKCS7,
45	0	PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
46	0	ret = 0;
47	0	}
48	0	break;
49	12	case PKCS7_OP_GET_DETACHED_SIGNATURE:
50	12	if (nid == NID_pkcs7_signed) {
51	12	if (p7->d.sign == NULL \|\| p7->d.sign->contents->d.ptr == NULL)
52	8	ret = 1;
53	4	else
54	4	ret = 0;
55
56	12	p7->detached = ret;
57	12	} else {
58	0	ERR_raise(ERR_LIB_PKCS7,
59	0	PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
60	0	ret = 0;
61	0	}
62
63	12	break;
64	0	default:
65	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNKNOWN_OPERATION);
66	0	ret = 0;
67	12	}
68	12	return ret;
69	12	}
70
71		int PKCS7_content_new(PKCS7 *p7, int type)
72	0	{
73	0	PKCS7 *ret = NULL;
74
75	0	if ((ret = PKCS7_new()) == NULL)
76	0	goto err;
77	0	if (!PKCS7_set_type(ret, type))
78	0	goto err;
79	0	if (!PKCS7_set_content(p7, ret))
80	0	goto err;
81
82	0	return 1;
83	0	err:
84	0	PKCS7_free(ret);
85	0	return 0;
86	0	}
87
88		int PKCS7_set_content(PKCS7 p7, PKCS7 p7_data)
89	0	{
90	0	int i;
91
92	0	i = OBJ_obj2nid(p7->type);
93	0	switch (i) {
94	0	case NID_pkcs7_signed:
95	0	PKCS7_free(p7->d.sign->contents);
96	0	p7->d.sign->contents = p7_data;
97	0	break;
98	0	case NID_pkcs7_digest:
99	0	PKCS7_free(p7->d.digest->contents);
100	0	p7->d.digest->contents = p7_data;
101	0	break;
102	0	case NID_pkcs7_data:
103	0	case NID_pkcs7_enveloped:
104	0	case NID_pkcs7_signedAndEnveloped:
105	0	case NID_pkcs7_encrypted:
106	0	default:
107	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
108	0	goto err;
109	0	}
110	0	return 1;
111	0	err:
112	0	return 0;
113	0	}
114
115		int PKCS7_set_type(PKCS7 *p7, int type)
116	0	{
117	0	ASN1_OBJECT *obj;
118
119		/*
120		* PKCS7_content_free(p7);
121		*/
122	0	obj = OBJ_nid2obj(type); /* will not fail */
123
124	0	switch (type) {
125	0	case NID_pkcs7_signed:
126	0	p7->type = obj;
127	0	if ((p7->d.sign = PKCS7_SIGNED_new()) == NULL)
128	0	goto err;
129	0	if (!ASN1_INTEGER_set(p7->d.sign->version, 1)) {
130	0	PKCS7_SIGNED_free(p7->d.sign);
131	0	p7->d.sign = NULL;
132	0	goto err;
133	0	}
134	0	break;
135	0	case NID_pkcs7_data:
136	0	p7->type = obj;
137	0	if ((p7->d.data = ASN1_OCTET_STRING_new()) == NULL)
138	0	goto err;
139	0	break;
140	0	case NID_pkcs7_signedAndEnveloped:
141	0	p7->type = obj;
142	0	if ((p7->d.signed_and_enveloped = PKCS7_SIGN_ENVELOPE_new())
143	0	== NULL)
144	0	goto err;
145	0	if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1))
146	0	goto err;
147	0	p7->d.signed_and_enveloped->enc_data->content_type
148	0	= OBJ_nid2obj(NID_pkcs7_data);
149	0	break;
150	0	case NID_pkcs7_enveloped:
151	0	p7->type = obj;
152	0	if ((p7->d.enveloped = PKCS7_ENVELOPE_new())
153	0	== NULL)
154	0	goto err;
155	0	if (!ASN1_INTEGER_set(p7->d.enveloped->version, 0))
156	0	goto err;
157	0	p7->d.enveloped->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
158	0	break;
159	0	case NID_pkcs7_encrypted:
160	0	p7->type = obj;
161	0	if ((p7->d.encrypted = PKCS7_ENCRYPT_new())
162	0	== NULL)
163	0	goto err;
164	0	if (!ASN1_INTEGER_set(p7->d.encrypted->version, 0))
165	0	goto err;
166	0	p7->d.encrypted->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
167	0	break;
168
169	0	case NID_pkcs7_digest:
170	0	p7->type = obj;
171	0	if ((p7->d.digest = PKCS7_DIGEST_new())
172	0	== NULL)
173	0	goto err;
174	0	if (!ASN1_INTEGER_set(p7->d.digest->version, 0))
175	0	goto err;
176	0	break;
177	0	default:
178	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
179	0	goto err;
180	0	}
181	0	return 1;
182	0	err:
183	0	return 0;
184	0	}
185
186		int PKCS7_set0_type_other(PKCS7 p7, int type, ASN1_TYPE other)
187	0	{
188	0	p7->type = OBJ_nid2obj(type);
189	0	p7->d.other = other;
190	0	return 1;
191	0	}
192
193		int PKCS7_add_signer(PKCS7 p7, PKCS7_SIGNER_INFO psi)
194	0	{
195	0	int i, j;
196	0	ASN1_OBJECT *obj;
197	0	X509_ALGOR *alg;
198	0	STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
199	0	STACK_OF(X509_ALGOR) *md_sk;
200
201	0	i = OBJ_obj2nid(p7->type);
202	0	switch (i) {
203	0	case NID_pkcs7_signed:
204	0	signer_sk = p7->d.sign->signer_info;
205	0	md_sk = p7->d.sign->md_algs;
206	0	break;
207	0	case NID_pkcs7_signedAndEnveloped:
208	0	signer_sk = p7->d.signed_and_enveloped->signer_info;
209	0	md_sk = p7->d.signed_and_enveloped->md_algs;
210	0	break;
211	0	default:
212	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
213	0	return 0;
214	0	}
215
216	0	obj = psi->digest_alg->algorithm;
217		/* If the digest is not currently listed, add it */
218	0	j = 0;
219	0	for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
220	0	alg = sk_X509_ALGOR_value(md_sk, i);
221	0	if (OBJ_cmp(obj, alg->algorithm) == 0) {
222	0	j = 1;
223	0	break;
224	0	}
225	0	}
226	0	if (!j) { /* we need to add another algorithm */
227	0	int nid;
228
229	0	if ((alg = X509_ALGOR_new()) == NULL
230	0	\|\| (alg->parameter = ASN1_TYPE_new()) == NULL) {
231	0	X509_ALGOR_free(alg);
232	0	ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
233	0	return 0;
234	0	}
235		/*
236		* If there is a constant copy of the ASN1 OBJECT in libcrypto, then
237		* use that. Otherwise, use a dynamically duplicated copy
238		*/
239	0	if ((nid = OBJ_obj2nid(obj)) != NID_undef)
240	0	alg->algorithm = OBJ_nid2obj(nid);
241	0	else
242	0	alg->algorithm = OBJ_dup(obj);
243	0	alg->parameter->type = V_ASN1_NULL;
244	0	if (alg->algorithm == NULL \|\| !sk_X509_ALGOR_push(md_sk, alg)) {
245	0	X509_ALGOR_free(alg);
246	0	return 0;
247	0	}
248	0	}
249
250	0	psi->ctx = ossl_pkcs7_get0_ctx(p7);
251	0	if (!sk_PKCS7_SIGNER_INFO_push(signer_sk, psi))
252	0	return 0;
253	0	return 1;
254	0	}
255
256		int PKCS7_add_certificate(PKCS7 p7, X509 x509)
257	0	{
258	0	int i;
259	0	STACK_OF(X509) **sk;
260
261	0	i = OBJ_obj2nid(p7->type);
262	0	switch (i) {
263	0	case NID_pkcs7_signed:
264	0	sk = &(p7->d.sign->cert);
265	0	break;
266	0	case NID_pkcs7_signedAndEnveloped:
267	0	sk = &(p7->d.signed_and_enveloped->cert);
268	0	break;
269	0	default:
270	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
271	0	return 0;
272	0	}
273
274	0	return ossl_x509_add_cert_new(sk, x509, X509_ADD_FLAG_UP_REF);
275	0	}
276
277		int PKCS7_add_crl(PKCS7 p7, X509_CRL crl)
278	0	{
279	0	int i;
280	0	STACK_OF(X509_CRL) **sk;
281
282	0	i = OBJ_obj2nid(p7->type);
283	0	switch (i) {
284	0	case NID_pkcs7_signed:
285	0	sk = &(p7->d.sign->crl);
286	0	break;
287	0	case NID_pkcs7_signedAndEnveloped:
288	0	sk = &(p7->d.signed_and_enveloped->crl);
289	0	break;
290	0	default:
291	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
292	0	return 0;
293	0	}
294
295	0	if (*sk == NULL)
296	0	*sk = sk_X509_CRL_new_null();
297	0	if (*sk == NULL) {
298	0	ERR_raise(ERR_LIB_PKCS7, ERR_R_CRYPTO_LIB);
299	0	return 0;
300	0	}
301
302	0	X509_CRL_up_ref(crl);
303	0	if (!sk_X509_CRL_push(*sk, crl)) {
304	0	X509_CRL_free(crl);
305	0	return 0;
306	0	}
307	0	return 1;
308	0	}
309
310		static int pkcs7_ecdsa_or_dsa_sign_verify_setup(PKCS7_SIGNER_INFO *si,
311		int verify)
312	0	{
313	0	if (!verify) {
314	0	int snid, hnid;
315	0	X509_ALGOR alg1, alg2;
316	0	EVP_PKEY *pkey = si->pkey;
317
318	0	PKCS7_SIGNER_INFO_get0_algs(si, NULL, &alg1, &alg2);
319	0	if (alg1 == NULL \|\| alg1->algorithm == NULL)
320	0	return -1;
321	0	hnid = OBJ_obj2nid(alg1->algorithm);
322	0	if (hnid == NID_undef)
323	0	return -1;
324	0	if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_get_id(pkey)))
325	0	return -1;
326	0	return X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, NULL);
327	0	}
328	0	return 1;
329	0	}
330
331		static int pkcs7_rsa_sign_verify_setup(PKCS7_SIGNER_INFO *si, int verify)
332	0	{
333	0	if (!verify) {
334	0	X509_ALGOR *alg = NULL;
335
336	0	PKCS7_SIGNER_INFO_get0_algs(si, NULL, NULL, &alg);
337	0	if (alg != NULL)
338	0	return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
339	0	V_ASN1_NULL, NULL);
340	0	}
341	0	return 1;
342	0	}
343
344		int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO p7i, X509 x509, EVP_PKEY *pkey,
345		const EVP_MD *dgst)
346	0	{
347	0	int ret;
348
349		/* We now need to add another PKCS7_SIGNER_INFO entry */
350	0	if (!ASN1_INTEGER_set(p7i->version, 1))
351	0	return 0;
352	0	if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
353	0	X509_get_issuer_name(x509)))
354	0	return 0;
355
356		/*
357		* because ASN1_INTEGER_set is used to set a 'long' we will do things the
358		* ugly way.
359		*/
360	0	ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
361	0	if (!(p7i->issuer_and_serial->serial =
362	0	ASN1_INTEGER_dup(X509_get0_serialNumber(x509))))
363	0	return 0;
364
365		/* lets keep the pkey around for a while */
366	0	EVP_PKEY_up_ref(pkey);
367	0	p7i->pkey = pkey;
368
369		/* Set the algorithms */
370
371	0	if (!X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_get_type(dgst)),
372	0	V_ASN1_NULL, NULL))
373	0	return 0;
374
375	0	if (EVP_PKEY_is_a(pkey, "EC") \|\| EVP_PKEY_is_a(pkey, "DSA"))
376	0	return pkcs7_ecdsa_or_dsa_sign_verify_setup(p7i, 0);
377	0	if (EVP_PKEY_is_a(pkey, "RSA"))
378	0	return pkcs7_rsa_sign_verify_setup(p7i, 0);
379
380	0	if (pkey->ameth != NULL && pkey->ameth->pkey_ctrl != NULL) {
381	0	ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN, 0, p7i);
382	0	if (ret > 0)
383	0	return 1;
384	0	if (ret != -2) {
385	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_CTRL_FAILURE);
386	0	return 0;
387	0	}
388	0	}
389	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
390	0	return 0;
391	0	}
392
393		PKCS7_SIGNER_INFO PKCS7_add_signature(PKCS7 p7, X509 x509, EVP_PKEY pkey,
394		const EVP_MD *dgst)
395	0	{
396	0	PKCS7_SIGNER_INFO *si = NULL;
397
398	0	if (dgst == NULL) {
399	0	int def_nid;
400	0	if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) <= 0)
401	0	goto err;
402	0	dgst = EVP_get_digestbynid(def_nid);
403	0	if (dgst == NULL) {
404	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_NO_DEFAULT_DIGEST);
405	0	goto err;
406	0	}
407	0	}
408
409	0	if ((si = PKCS7_SIGNER_INFO_new()) == NULL)
410	0	goto err;
411	0	if (PKCS7_SIGNER_INFO_set(si, x509, pkey, dgst) <= 0)
412	0	goto err;
413	0	if (!PKCS7_add_signer(p7, si))
414	0	goto err;
415	0	return si;
416	0	err:
417	0	PKCS7_SIGNER_INFO_free(si);
418	0	return NULL;
419	0	}
420
421		static STACK_OF(X509) pkcs7_get_signer_certs(const PKCS7 p7)
422	126	{
423	126	if (p7->d.ptr == NULL)
424	0	return NULL;
425	126	if (PKCS7_type_is_signed(p7))
426	41	return p7->d.sign->cert;
427	85	if (PKCS7_type_is_signedAndEnveloped(p7))
428	0	return p7->d.signed_and_enveloped->cert;
429	85	return NULL;
430	85	}
431
432		static STACK_OF(PKCS7_RECIP_INFO) pkcs7_get_recipient_info(const PKCS7 p7)
433	255	{
434	255	if (p7->d.ptr == NULL)
435	0	return NULL;
436	255	if (PKCS7_type_is_signedAndEnveloped(p7))
437	0	return p7->d.signed_and_enveloped->recipientinfo;
438	255	if (PKCS7_type_is_enveloped(p7))
439	1	return p7->d.enveloped->recipientinfo;
440	254	return NULL;
441	255	}
442
443		/*
444		* Set up the library context into any loaded structure that needs it.
445		* i.e loaded X509 objects.
446		*/
447		void ossl_pkcs7_resolve_libctx(PKCS7 *p7)
448	399	{
449	399	int i;
450	399	const PKCS7_CTX *ctx = ossl_pkcs7_get0_ctx(p7);
451	399	OSSL_LIB_CTX *libctx = ossl_pkcs7_ctx_get0_libctx(ctx);
452	399	const char *propq = ossl_pkcs7_ctx_get0_propq(ctx);
453	399	STACK_OF(PKCS7_RECIP_INFO) *rinfos;
454	399	STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
455	399	STACK_OF(X509) *certs;
456
457	399	if (ctx == NULL \|\| p7->d.ptr == NULL)
458	144	return;
459
460	255	rinfos = pkcs7_get_recipient_info(p7);
461	255	sinfos = PKCS7_get_signer_info(p7);
462	255	certs = pkcs7_get_signer_certs(p7);
463
464	445	for (i = 0; i < sk_X509_num(certs); i++)
465	190	ossl_x509_set0_libctx(sk_X509_value(certs, i), libctx, propq);
466
467	255	for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rinfos); i++) {
468	0	PKCS7_RECIP_INFO *ri = sk_PKCS7_RECIP_INFO_value(rinfos, i);
469
470	0	ossl_x509_set0_libctx(ri->cert, libctx, propq);
471	0	}
472
473	350	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
474	95	PKCS7_SIGNER_INFO *si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
475
476	95	if (si != NULL)
477	95	si->ctx = ctx;
478	95	}
479	255	}
480
481		const PKCS7_CTX ossl_pkcs7_get0_ctx(const PKCS7 p7)
482	399	{
483	399	return p7 != NULL ? &p7->ctx : NULL;
484	399	}
485
486		void ossl_pkcs7_set0_libctx(PKCS7 p7, OSSL_LIB_CTX ctx)
487	0	{
488	0	p7->ctx.libctx = ctx;
489	0	}
490
491		int ossl_pkcs7_set1_propq(PKCS7 p7, const char propq)
492	0	{
493	0	if (p7->ctx.propq != NULL) {
494	0	OPENSSL_free(p7->ctx.propq);
495	0	p7->ctx.propq = NULL;
496	0	}
497	0	if (propq != NULL) {
498	0	p7->ctx.propq = OPENSSL_strdup(propq);
499	0	if (p7->ctx.propq == NULL)
500	0	return 0;
501	0	}
502	0	return 1;
503	0	}
504
505		int ossl_pkcs7_ctx_propagate(const PKCS7 from, PKCS7 to)
506	0	{
507	0	ossl_pkcs7_set0_libctx(to, from->ctx.libctx);
508	0	if (!ossl_pkcs7_set1_propq(to, from->ctx.propq))
509	0	return 0;
510
511	0	ossl_pkcs7_resolve_libctx(to);
512	0	return 1;
513	0	}
514
515		OSSL_LIB_CTX ossl_pkcs7_ctx_get0_libctx(const PKCS7_CTX ctx)
516	399	{
517	399	return ctx != NULL ? ctx->libctx : NULL;
518	399	}
519		const char ossl_pkcs7_ctx_get0_propq(const PKCS7_CTX ctx)
520	399	{
521	399	return ctx != NULL ? ctx->propq : NULL;
522	399	}
523
524		int PKCS7_set_digest(PKCS7 p7, const EVP_MD md)
525	0	{
526	0	if (PKCS7_type_is_digest(p7)) {
527	0	if ((p7->d.digest->md->parameter = ASN1_TYPE_new()) == NULL) {
528	0	ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
529	0	return 0;
530	0	}
531	0	p7->d.digest->md->parameter->type = V_ASN1_NULL;
532	0	p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
533	0	return 1;
534	0	}
535
536	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
537	0	return 1;
538	0	}
539
540		STACK_OF(PKCS7_SIGNER_INFO) PKCS7_get_signer_info(PKCS7 p7)
541	654	{
542	654	if (p7 == NULL \|\| p7->d.ptr == NULL)
543	144	return NULL;
544	510	if (PKCS7_type_is_signed(p7)) {
545	192	return p7->d.sign->signer_info;
546	318	} else if (PKCS7_type_is_signedAndEnveloped(p7)) {
547	0	return p7->d.signed_and_enveloped->signer_info;
548	0	} else
549	318	return NULL;
550	510	}
551
552		void PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO si, EVP_PKEY *pk,
553		X509_ALGOR pdig, X509_ALGOR psig)
554	0	{
555	0	if (pk)
556	0	*pk = si->pkey;
557	0	if (pdig)
558	0	*pdig = si->digest_alg;
559	0	if (psig)
560	0	*psig = si->digest_enc_alg;
561	0	}
562
563		void PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO ri, X509_ALGOR *penc)
564	0	{
565	0	if (penc)
566	0	*penc = ri->key_enc_algor;
567	0	}
568
569		PKCS7_RECIP_INFO PKCS7_add_recipient(PKCS7 p7, X509 *x509)
570	0	{
571	0	PKCS7_RECIP_INFO *ri;
572
573	0	if ((ri = PKCS7_RECIP_INFO_new()) == NULL)
574	0	goto err;
575	0	if (PKCS7_RECIP_INFO_set(ri, x509) <= 0)
576	0	goto err;
577	0	if (!PKCS7_add_recipient_info(p7, ri))
578	0	goto err;
579	0	ri->ctx = ossl_pkcs7_get0_ctx(p7);
580	0	return ri;
581	0	err:
582	0	PKCS7_RECIP_INFO_free(ri);
583	0	return NULL;
584	0	}
585
586		int PKCS7_add_recipient_info(PKCS7 p7, PKCS7_RECIP_INFO ri)
587	0	{
588	0	int i;
589	0	STACK_OF(PKCS7_RECIP_INFO) *sk;
590
591	0	i = OBJ_obj2nid(p7->type);
592	0	switch (i) {
593	0	case NID_pkcs7_signedAndEnveloped:
594	0	sk = p7->d.signed_and_enveloped->recipientinfo;
595	0	break;
596	0	case NID_pkcs7_enveloped:
597	0	sk = p7->d.enveloped->recipientinfo;
598	0	break;
599	0	default:
600	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
601	0	return 0;
602	0	}
603
604	0	if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
605	0	return 0;
606	0	return 1;
607	0	}
608
609		static int pkcs7_rsa_encrypt_decrypt_setup(PKCS7_RECIP_INFO *ri, int decrypt)
610	0	{
611	0	X509_ALGOR *alg = NULL;
612
613	0	if (!decrypt) {
614	0	PKCS7_RECIP_INFO_get0_alg(ri, &alg);
615	0	if (alg != NULL)
616	0	return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
617	0	V_ASN1_NULL, NULL);
618	0	}
619	0	return 1;
620	0	}
621
622		int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO p7i, X509 x509)
623	0	{
624	0	int ret;
625	0	EVP_PKEY *pkey = NULL;
626	0	if (!ASN1_INTEGER_set(p7i->version, 0))
627	0	return 0;
628	0	if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
629	0	X509_get_issuer_name(x509)))
630	0	return 0;
631
632	0	ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
633	0	if (!(p7i->issuer_and_serial->serial =
634	0	ASN1_INTEGER_dup(X509_get0_serialNumber(x509))))
635	0	return 0;
636
637	0	pkey = X509_get0_pubkey(x509);
638	0	if (pkey == NULL)
639	0	return 0;
640
641	0	if (EVP_PKEY_is_a(pkey, "RSA-PSS"))
642	0	return -2;
643	0	if (EVP_PKEY_is_a(pkey, "RSA")) {
644	0	if (pkcs7_rsa_encrypt_decrypt_setup(p7i, 0) <= 0)
645	0	goto err;
646	0	goto finished;
647	0	}
648
649	0	if (pkey->ameth == NULL \|\| pkey->ameth->pkey_ctrl == NULL) {
650	0	ERR_raise(ERR_LIB_PKCS7,
651	0	PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
652	0	goto err;
653	0	}
654
655	0	ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_ENCRYPT, 0, p7i);
656	0	if (ret == -2) {
657	0	ERR_raise(ERR_LIB_PKCS7,
658	0	PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
659	0	goto err;
660	0	}
661	0	if (ret <= 0) {
662	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_ENCRYPTION_CTRL_FAILURE);
663	0	goto err;
664	0	}
665	0	finished:
666	0	X509_up_ref(x509);
667	0	p7i->cert = x509;
668
669	0	return 1;
670
671	0	err:
672	0	return 0;
673	0	}
674
675		X509 PKCS7_cert_from_signer_info(PKCS7 p7, PKCS7_SIGNER_INFO *si)
676	95	{
677	95	if (PKCS7_type_is_signed(p7))
678	95	return (X509_find_by_issuer_and_serial(p7->d.sign->cert,
679	95	si->issuer_and_serial->issuer,
680	95	si->
681	95	issuer_and_serial->serial));
682	0	else
683	0	return NULL;
684	95	}
685
686		int PKCS7_set_cipher(PKCS7 p7, const EVP_CIPHER cipher)
687	0	{
688	0	int i;
689	0	PKCS7_ENC_CONTENT *ec;
690
691	0	i = OBJ_obj2nid(p7->type);
692	0	switch (i) {
693	0	case NID_pkcs7_signedAndEnveloped:
694	0	ec = p7->d.signed_and_enveloped->enc_data;
695	0	break;
696	0	case NID_pkcs7_enveloped:
697	0	ec = p7->d.enveloped->enc_data;
698	0	break;
699	0	default:
700	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
701	0	return 0;
702	0	}
703
704		/* Check cipher OID exists and has data in it */
705	0	i = EVP_CIPHER_get_type(cipher);
706	0	if (i == NID_undef) {
707	0	ERR_raise(ERR_LIB_PKCS7, PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
708	0	return 0;
709	0	}
710
711	0	ec->cipher = cipher;
712	0	ec->ctx = ossl_pkcs7_get0_ctx(p7);
713	0	return 1;
714	0	}
715
716		/* unfortunately cannot constify BIO_new_NDEF() due to this and CMS_stream() */
717		int PKCS7_stream(unsigned char **boundary, PKCS7 p7)
718	0	{
719	0	ASN1_OCTET_STRING *os = NULL;
720
721	0	switch (OBJ_obj2nid(p7->type)) {
722	0	case NID_pkcs7_data:
723	0	os = p7->d.data;
724	0	break;
725
726	0	case NID_pkcs7_signedAndEnveloped:
727	0	os = p7->d.signed_and_enveloped->enc_data->enc_data;
728	0	if (os == NULL) {
729	0	os = ASN1_OCTET_STRING_new();
730	0	p7->d.signed_and_enveloped->enc_data->enc_data = os;
731	0	}
732	0	break;
733
734	0	case NID_pkcs7_enveloped:
735	0	os = p7->d.enveloped->enc_data->enc_data;
736	0	if (os == NULL) {
737	0	os = ASN1_OCTET_STRING_new();
738	0	p7->d.enveloped->enc_data->enc_data = os;
739	0	}
740	0	break;
741
742	0	case NID_pkcs7_signed:
743	0	os = p7->d.sign->contents->d.data;
744	0	break;
745
746	0	default:
747	0	os = NULL;
748	0	break;
749	0	}
750
751	0	if (os == NULL)
752	0	return 0;
753
754	0	os->flags \|= ASN1_STRING_FLAG_NDEF;
755	0	*boundary = &os->data;
756
757	0	return 1;
758	0	}