-BIO *PKCS7_dataDecode(p7,pkey,in_bio,xs)
-PKCS7 *p7;
-EVP_PKEY *pkey;
-BIO *in_bio;
-X509_STORE *xs;
- {
- int i,j;
- BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
- char *tmp=NULL;
- X509_ALGOR *xa;
- ASN1_OCTET_STRING *data_body=NULL;
- EVP_MD *evp_md;
- EVP_CIPHER *evp_cipher=NULL;
- EVP_CIPHER_CTX *evp_ctx=NULL;
- X509_ALGOR *enc_alg=NULL;
- STACK *md_sk=NULL,*rsk=NULL;
- X509_ALGOR *xalg=NULL;
- PKCS7_RECIP_INFO *ri=NULL;
-/* EVP_PKEY *pkey; */
-#if 0
- X509_STORE_CTX s_ctx;
-#endif
-
- i=OBJ_obj2nid(p7->type);
- p7->state=PKCS7_S_HEADER;
-
- switch (i)
- {
- case NID_pkcs7_signed:
- data_body=p7->d.sign->contents->d.data;
- md_sk=p7->d.sign->md_algs;
- break;
- case NID_pkcs7_signedAndEnveloped:
- rsk=p7->d.signed_and_enveloped->recipientinfo;
- md_sk=p7->d.signed_and_enveloped->md_algs;
- data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
- enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
- evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
- if (evp_cipher == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
- goto err;
- }
- xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
- break;
- case NID_pkcs7_enveloped:
- rsk=p7->d.enveloped->recipientinfo;
- enc_alg=p7->d.enveloped->enc_data->algorithm;
- data_body=p7->d.enveloped->enc_data->enc_data;
- evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
- if (evp_cipher == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
- goto err;
- }
- xalg=p7->d.enveloped->enc_data->algorithm;
- break;
- default:
- PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
- goto err;
- }
-
- /* We will be checking the signature */
- if (md_sk != NULL)
- {
- for (i=0; i<sk_num(md_sk); i++)
- {
- xa=(X509_ALGOR *)sk_value(md_sk,i);
- if ((btmp=BIO_new(BIO_f_md())) == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
- goto err;
- }
-
- j=OBJ_obj2nid(xa->algorithm);
- evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
- if (evp_md == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
- goto err;
- }
-
- BIO_set_md(btmp,evp_md);
- if (out == NULL)
- out=btmp;
- else
- BIO_push(out,btmp);
- btmp=NULL;
- }
- }
-
- if (evp_cipher != NULL)
- {
-#if 0
- unsigned char key[EVP_MAX_KEY_LENGTH];
- unsigned char iv[EVP_MAX_IV_LENGTH];
- unsigned char *p;
- int keylen,ivlen;
- int max;
- X509_OBJECT ret;
-#endif
- int jj;
-
- if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
- goto err;
- }
-
- /* It was encrypted, we need to decrypt the secret key
- * with the private key */
-
- /* We need to find a private key for one of the people in the
- * recipentinfo list */
- if (rsk == NULL)
- return(NULL);
-
- ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
-#if 0
- X509_STORE_CTX_init(&s_ctx,xs,NULL,NULL);
- for (i=0; i<sk_num(rsk); i++)
- {
- ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
- uf (X509_STORE_get_by_issuer_serial(&s_ctx,
- X509_LU_PKEY,
- ri->issuer_and_serial->issuer,
- ri->issuer_and_serial->serial,
- &ret))
- break;
- ri=NULL;
- }
- if (ri == NULL) return(NULL);
- pkey=ret.data.pkey;
-#endif
- if (pkey == NULL)
- {
- return(NULL);
- }
-
- jj=EVP_PKEY_size(pkey);
- tmp=Malloc(jj+10);
- if (tmp == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- jj=EVP_PKEY_decrypt((unsigned char *)tmp,
- ASN1_STRING_data(ri->enc_key),
- ASN1_STRING_length(ri->enc_key),
- pkey);
- if (jj <= 0)
- {
- PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_EVP_LIB);
- goto err;
- }
-
- evp_ctx=NULL;
- BIO_get_cipher_ctx(etmp,&evp_ctx);
- EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0);
- if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
- return(NULL);
-
- if (jj != EVP_CIPHER_CTX_key_length(evp_ctx))
- {
- PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
- goto err;
- }
- EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0);
-
- memset(tmp,0,jj);
-
- if (out == NULL)
- out=etmp;
- else
- BIO_push(out,etmp);
- etmp=NULL;
- }
-
-#if 1
- if (p7->detached || (in_bio != NULL))
- {
- bio=in_bio;
- }
- else
- {
- bio=BIO_new(BIO_s_mem());
- /* We need to set this so that when we have read all
- * the data, the encrypt BIO, if present, will read
- * EOF and encode the last few bytes */
- BIO_set_mem_eof_return(bio,0);
-
- if (data_body->length > 0)
- BIO_write(bio,(char *)data_body->data,data_body->length);
- }
- BIO_push(out,bio);
- bio=NULL;
-#endif
- if (0)
- {
-err:
- if (out != NULL) BIO_free_all(out);
- if (btmp != NULL) BIO_free_all(btmp);
- if (etmp != NULL) BIO_free_all(etmp);
- if (bio != NULL) BIO_free_all(bio);
- out=NULL;
- }
- if (tmp != NULL)
- Free(tmp);
- return(out);
- }
-#endif
-
-int PKCS7_dataFinal(p7,bio)
-PKCS7 *p7;
-BIO *bio;
- {
- int ret=0;
- int i,j;
- BIO *btmp;
- BUF_MEM *buf_mem=NULL;
- BUF_MEM *buf=NULL;
- PKCS7_SIGNER_INFO *si;
- EVP_MD_CTX *mdc,ctx_tmp;
- STACK *sk,*si_sk=NULL;
- unsigned char *p,*pp=NULL;
- int x;
- ASN1_OCTET_STRING *os=NULL;
-
- i=OBJ_obj2nid(p7->type);
- p7->state=PKCS7_S_HEADER;
-
- switch (i)
- {
- case NID_pkcs7_signedAndEnveloped:
- /* XXXXXXXXXXXXXXXX */
- si_sk=p7->d.signed_and_enveloped->signer_info;
- os=ASN1_OCTET_STRING_new();
- p7->d.signed_and_enveloped->enc_data->enc_data=os;
- break;
- case NID_pkcs7_enveloped:
- /* XXXXXXXXXXXXXXXX */
- os=ASN1_OCTET_STRING_new();
- p7->d.enveloped->enc_data->enc_data=os;
- break;
- case NID_pkcs7_signed:
- si_sk=p7->d.sign->signer_info;
- os=p7->d.sign->contents->d.data;
- break;
- }
-
- if (si_sk != NULL)
- {
- if ((buf=BUF_MEM_new()) == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
- goto err;
- }
- for (i=0; i<sk_num(si_sk); i++)
- {
- si=(PKCS7_SIGNER_INFO *)
- sk_value(si_sk,i);
- if (si->pkey == NULL) continue;
-
- j=OBJ_obj2nid(si->digest_alg->algorithm);
-
- btmp=bio;
- for (;;)
- {
- if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
- == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
- goto err;
- }
- BIO_get_md_ctx(btmp,&mdc);
- if (mdc == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR);
- goto err;
- }
- if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j)
- break;
- else
- btmp=btmp->next_bio;
- }
-
- /* We now have the EVP_MD_CTX, lets do the
- * signing. */
- memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp));
- if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey)))
- {
- PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
- goto err;
- }
-
- sk=si->auth_attr;
-
- /* If there are attributes, we add the digest
- * attribute and only sign the attributes */
- if ((sk != NULL) && (sk_num(sk) != 0))
- {
- unsigned char md_data[EVP_MAX_MD_SIZE];
- unsigned int md_len;
- ASN1_OCTET_STRING *digest;
- ASN1_UTCTIME *sign_time;
- EVP_MD *md_tmp;
-
- /* Add signing time */
- sign_time=X509_gmtime_adj(NULL,0);
- PKCS7_add_signed_attribute(si,
- NID_pkcs9_signingTime,
- V_ASN1_UTCTIME,(char *)sign_time);
-
- /* Add digest */
- md_tmp=EVP_MD_CTX_type(&ctx_tmp);
- EVP_DigestFinal(&ctx_tmp,md_data,&md_len);
- digest=ASN1_OCTET_STRING_new();
- ASN1_OCTET_STRING_set(digest,md_data,md_len);
- PKCS7_add_signed_attribute(si,NID_pkcs9_messageDigest,
- V_ASN1_OCTET_STRING,(char *)digest);
-
- /* Now sign the mess */
- EVP_SignInit(&ctx_tmp,md_tmp);
- x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
- V_ASN1_SET,V_ASN1_UNIVERSAL);
- pp=(unsigned char *)Malloc(x);
- p=pp;
- i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
- V_ASN1_SET,V_ASN1_UNIVERSAL);
- EVP_SignUpdate(&ctx_tmp,pp,x);
- Free(pp);
- pp=NULL;
- }
-
- if (si->pkey->type == EVP_PKEY_DSA)
- ctx_tmp.digest=EVP_dss1();
-
- if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
- (unsigned int *)&buf->length,si->pkey))
- {
- PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
- goto err;
- }
- if (!ASN1_STRING_set(si->enc_digest,
- (unsigned char *)buf->data,buf->length))
- {
- PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
- goto err;
- }
- }
- }
-
- if (p7->detached)
- ASN1_OCTET_STRING_set(os,(unsigned char *)"",0);
- else
- {
- btmp=BIO_find_type(bio,BIO_TYPE_MEM);
- if (btmp == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
- goto err;
- }
- BIO_get_mem_ptr(btmp,&buf_mem);
- ASN1_OCTET_STRING_set(os,
- (unsigned char *)buf_mem->data,buf_mem->length);
- }
- if (pp != NULL) Free(pp);
- pp=NULL;
-
- ret=1;
-err:
- if (buf != NULL) BUF_MEM_free(buf);
- return(ret);
- }
-
-int PKCS7_dataVerify(cert_store,ctx,bio,p7,si)
-X509_STORE *cert_store;
-X509_STORE_CTX *ctx;
-BIO *bio;
-PKCS7 *p7;
-PKCS7_SIGNER_INFO *si;
- {
-/* PKCS7_SIGNED *s; */
- ASN1_OCTET_STRING *os;
- EVP_MD_CTX mdc_tmp,*mdc;
- unsigned char *pp,*p;
- PKCS7_ISSUER_AND_SERIAL *ias;
- int ret=0,i;
- int md_type;
- STACK *sk,*cert;
- BIO *btmp;
- X509 *x509;
-
- if (PKCS7_type_is_signed(p7))
- {
- cert=p7->d.sign->cert;
- }
- else if (PKCS7_type_is_signedAndEnveloped(p7))
- {
- cert=p7->d.signed_and_enveloped->cert;
- }
- else
- {
- PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
- goto err;
- }
- /* XXXXXXXXXXXXXXXXXXXXXXX */
- ias=si->issuer_and_serial;
-
- x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
-
- /* were we able to find the cert in passed to us */
- if (x509 == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
- goto err;
- }
-
- /* Lets verify */
- X509_STORE_CTX_init(ctx,cert_store,x509,cert);
- i=X509_verify_cert(ctx);
- if (i <= 0)
- {
- PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
- goto err;
- }
- X509_STORE_CTX_cleanup(ctx);
-
- /* So we like 'x509', lets check the signature. */
- md_type=OBJ_obj2nid(si->digest_alg->algorithm);
-
- btmp=bio;
- for (;;)
- {
- if ((btmp == NULL) ||
- ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
- {
- PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
- goto err;
- }
- BIO_get_md_ctx(btmp,&mdc);
- if (mdc == NULL)
- {
- PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR);
- goto err;
- }
- if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type)
- break;
- btmp=btmp->next_bio;
- }
-
- /* mdc is the digest ctx that we want, unless there are attributes,
- * in which case the digest is the signed attributes */
- memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp));
-
- sk=si->auth_attr;
- if ((sk != NULL) && (sk_num(sk) != 0))
- {
- unsigned char md_dat[EVP_MAX_MD_SIZE];
- int md_len;
- ASN1_OCTET_STRING *message_digest;
-
- EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);
- message_digest=PKCS7_digest_from_attributes(sk);
- if (!message_digest)
- {
- PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
- goto err;
- }
- if ((message_digest->length != md_len) ||
- (memcmp(message_digest->data,md_dat,md_len)))
- {
-#if 0
+BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
+{
+ int i, j;
+ BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
+ X509_ALGOR *xa;
+ ASN1_OCTET_STRING *data_body = NULL;
+ const EVP_MD *evp_md;
+ const EVP_CIPHER *evp_cipher = NULL;
+ EVP_CIPHER_CTX *evp_ctx = NULL;
+ X509_ALGOR *enc_alg = NULL;
+ STACK_OF(X509_ALGOR) *md_sk = NULL;
+ STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
+ PKCS7_RECIP_INFO *ri = NULL;
+ unsigned char *ek = NULL, *tkey = NULL;
+ int eklen = 0, tkeylen = 0;
+
+ i = OBJ_obj2nid(p7->type);
+ p7->state = PKCS7_S_HEADER;
+
+ switch (i) {
+ case NID_pkcs7_signed:
+ data_body = PKCS7_get_octet_string(p7->d.sign->contents);
+ if (!PKCS7_is_detached(p7) && data_body == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+ PKCS7_R_INVALID_SIGNED_DATA_TYPE);
+ goto err;
+ }
+ md_sk = p7->d.sign->md_algs;
+ break;
+ case NID_pkcs7_signedAndEnveloped:
+ rsk = p7->d.signed_and_enveloped->recipientinfo;
+ md_sk = p7->d.signed_and_enveloped->md_algs;
+ data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
+ enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
+ evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
+ if (evp_cipher == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+ PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
+ goto err;
+ }
+ break;
+ case NID_pkcs7_enveloped:
+ rsk = p7->d.enveloped->recipientinfo;
+ enc_alg = p7->d.enveloped->enc_data->algorithm;
+ data_body = p7->d.enveloped->enc_data->enc_data;
+ evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
+ if (evp_cipher == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+ PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
+ goto err;
+ }
+ break;
+ default:
+ PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
+ goto err;
+ }
+
+ /* We will be checking the signature */
+ if (md_sk != NULL) {
+ for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
+ xa = sk_X509_ALGOR_value(md_sk, i);
+ if ((btmp = BIO_new(BIO_f_md())) == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
+ goto err;
+ }
+
+ j = OBJ_obj2nid(xa->algorithm);
+ evp_md = EVP_get_digestbynid(j);
+ if (evp_md == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+ PKCS7_R_UNKNOWN_DIGEST_TYPE);
+ goto err;
+ }
+
+ BIO_set_md(btmp, evp_md);
+ if (out == NULL)
+ out = btmp;
+ else
+ BIO_push(out, btmp);
+ btmp = NULL;
+ }
+ }
+
+ if (evp_cipher != NULL) {
+ if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
+ goto err;
+ }
+
+ /*
+ * It was encrypted, we need to decrypt the secret key with the
+ * private key
+ */
+
+ /*
+ * Find the recipientInfo which matches the passed certificate (if
+ * any)
+ */
+
+ if (pcert) {
+ for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
+ ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
+ if (!pkcs7_cmp_ri(ri, pcert))
+ break;
+ ri = NULL;
+ }
+ if (ri == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+ PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
+ goto err;
+ }
+ }
+
+ /* If we haven't got a certificate try each ri in turn */
+ if (pcert == NULL) {
+ /*
+ * Always attempt to decrypt all rinfo even after success as a
+ * defence against MMA timing attacks.
+ */
+ for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
+ ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
+
+ if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
+ goto err;
+ ERR_clear_error();
+ }
+ } else {
+ /* Only exit on fatal errors, not decrypt failure */
+ if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
+ goto err;
+ ERR_clear_error();
+ }
+
+ evp_ctx = NULL;
+ BIO_get_cipher_ctx(etmp, &evp_ctx);
+ if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
+ goto err;
+ if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
+ goto err;
+ /* Generate random key as MMA defence */
+ tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
+ tkey = OPENSSL_malloc(tkeylen);
+ if (!tkey)
+ goto err;
+ if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
+ goto err;
+ if (ek == NULL) {
+ ek = tkey;
+ eklen = tkeylen;
+ tkey = NULL;
+ }
+
+ if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
+ /*
+ * Some S/MIME clients don't use the same key and effective key
+ * length. The key length is determined by the size of the
+ * decrypted RSA key.
+ */
+ if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
+ /* Use random key as MMA defence */
+ OPENSSL_cleanse(ek, eklen);
+ OPENSSL_free(ek);
+ ek = tkey;
+ eklen = tkeylen;
+ tkey = NULL;
+ }
+ }
+ /* Clear errors so we don't leak information useful in MMA */
+ ERR_clear_error();
+ if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
+ goto err;
+
+ if (ek) {
+ OPENSSL_cleanse(ek, eklen);
+ OPENSSL_free(ek);
+ ek = NULL;
+ }
+ if (tkey) {
+ OPENSSL_cleanse(tkey, tkeylen);
+ OPENSSL_free(tkey);
+ tkey = NULL;
+ }
+
+ if (out == NULL)
+ out = etmp;
+ else
+ BIO_push(out, etmp);
+ etmp = NULL;
+ }
+ if (PKCS7_is_detached(p7) || (in_bio != NULL)) {
+ bio = in_bio;
+ } else {
+ if (data_body->length > 0)
+ bio = BIO_new_mem_buf(data_body->data, data_body->length);
+ else {
+ bio = BIO_new(BIO_s_mem());
+ BIO_set_mem_eof_return(bio, 0);
+ }
+ if (bio == NULL)
+ goto err;
+ }
+ BIO_push(out, bio);
+ bio = NULL;
+ if (0) {
+ err:
+ if (ek) {
+ OPENSSL_cleanse(ek, eklen);
+ OPENSSL_free(ek);
+ }
+ if (tkey) {
+ OPENSSL_cleanse(tkey, tkeylen);
+ OPENSSL_free(tkey);
+ }
+ if (out != NULL)
+ BIO_free_all(out);
+ if (btmp != NULL)
+ BIO_free_all(btmp);
+ if (etmp != NULL)
+ BIO_free_all(etmp);
+ if (bio != NULL)
+ BIO_free_all(bio);
+ out = NULL;
+ }
+ return (out);
+}
+
+static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
+{
+ for (;;) {
+ bio = BIO_find_type(bio, BIO_TYPE_MD);
+ if (bio == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
+ PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
+ return NULL;
+ }
+ BIO_get_md_ctx(bio, pmd);
+ if (*pmd == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
+ return NULL;
+ }
+ if (EVP_MD_CTX_type(*pmd) == nid)
+ return bio;
+ bio = BIO_next(bio);
+ }
+ return NULL;
+}
+
+static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
+{
+ unsigned char md_data[EVP_MAX_MD_SIZE];
+ unsigned int md_len;
+
+ /* Add signing time if not already present */
+ if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
+ if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
+ PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ }
+
+ /* Add digest */
+ if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
+ PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
+ return 0;
+ }
+ if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
+ PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ /* Now sign the attributes */
+ if (!PKCS7_SIGNER_INFO_sign(si))
+ return 0;
+
+ return 1;
+}
+
+int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
+{
+ int ret = 0;
+ int i, j;
+ BIO *btmp;
+ PKCS7_SIGNER_INFO *si;
+ EVP_MD_CTX *mdc, ctx_tmp;
+ STACK_OF(X509_ATTRIBUTE) *sk;
+ STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
+ ASN1_OCTET_STRING *os = NULL;
+
+ EVP_MD_CTX_init(&ctx_tmp);
+ i = OBJ_obj2nid(p7->type);
+ p7->state = PKCS7_S_HEADER;
+
+ switch (i) {
+ case NID_pkcs7_data:
+ os = p7->d.data;
+ break;
+ case NID_pkcs7_signedAndEnveloped:
+ /* XXXXXXXXXXXXXXXX */
+ si_sk = p7->d.signed_and_enveloped->signer_info;
+ os = p7->d.signed_and_enveloped->enc_data->enc_data;
+ if (!os) {
+ os = M_ASN1_OCTET_STRING_new();
+ if (!os) {
+ PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ p7->d.signed_and_enveloped->enc_data->enc_data = os;
+ }
+ break;
+ case NID_pkcs7_enveloped:
+ /* XXXXXXXXXXXXXXXX */
+ os = p7->d.enveloped->enc_data->enc_data;
+ if (!os) {
+ os = M_ASN1_OCTET_STRING_new();
+ if (!os) {
+ PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ p7->d.enveloped->enc_data->enc_data = os;
+ }
+ break;
+ case NID_pkcs7_signed:
+ si_sk = p7->d.sign->signer_info;
+ os = PKCS7_get_octet_string(p7->d.sign->contents);
+ /* If detached data then the content is excluded */
+ if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
+ M_ASN1_OCTET_STRING_free(os);
+ p7->d.sign->contents->d.data = NULL;
+ }
+ break;
+
+ case NID_pkcs7_digest:
+ os = PKCS7_get_octet_string(p7->d.digest->contents);
+ /* If detached data then the content is excluded */
+ if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
+ M_ASN1_OCTET_STRING_free(os);
+ p7->d.digest->contents->d.data = NULL;
+ }
+ break;
+
+ default:
+ PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
+ goto err;
+ }
+
+ if (si_sk != NULL) {
+ for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
+ si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
+ if (si->pkey == NULL)
+ continue;
+
+ j = OBJ_obj2nid(si->digest_alg->algorithm);
+
+ btmp = bio;
+
+ btmp = PKCS7_find_digest(&mdc, btmp, j);
+
+ if (btmp == NULL)
+ goto err;
+
+ /*
+ * We now have the EVP_MD_CTX, lets do the signing.
+ */
+ if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc))
+ goto err;
+
+ sk = si->auth_attr;
+
+ /*
+ * If there are attributes, we add the digest attribute and only
+ * sign the attributes
+ */
+ if (sk_X509_ATTRIBUTE_num(sk) > 0) {
+ if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
+ goto err;
+ } else {
+ unsigned char *abuf = NULL;
+ unsigned int abuflen;
+ abuflen = EVP_PKEY_size(si->pkey);
+ abuf = OPENSSL_malloc(abuflen);
+ if (!abuf)
+ goto err;
+
+ if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) {
+ PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
+ goto err;
+ }
+ ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
+ }
+ }
+ } else if (i == NID_pkcs7_digest) {
+ unsigned char md_data[EVP_MAX_MD_SIZE];
+ unsigned int md_len;
+ if (!PKCS7_find_digest(&mdc, bio,
+ OBJ_obj2nid(p7->d.digest->md->algorithm)))
+ goto err;
+ if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
+ goto err;
+ M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
+ }
+
+ if (!PKCS7_is_detached(p7) && !(os->flags & ASN1_STRING_FLAG_NDEF)) {
+ char *cont;
+ long contlen;
+ btmp = BIO_find_type(bio, BIO_TYPE_MEM);
+ if (btmp == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
+ goto err;
+ }
+ contlen = BIO_get_mem_data(btmp, &cont);
+ /*
+ * Mark the BIO read only then we can use its copy of the data
+ * instead of making an extra copy.
+ */
+ BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
+ BIO_set_mem_eof_return(btmp, 0);
+ ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
+ }
+ ret = 1;
+ err:
+ EVP_MD_CTX_cleanup(&ctx_tmp);
+ return (ret);
+}
+
+int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
+{
+ EVP_MD_CTX mctx;
+ EVP_PKEY_CTX *pctx;
+ unsigned char *abuf = NULL;
+ int alen;
+ size_t siglen;
+ const EVP_MD *md = NULL;
+
+ md = EVP_get_digestbyobj(si->digest_alg->algorithm);
+ if (md == NULL)
+ return 0;
+
+ EVP_MD_CTX_init(&mctx);
+ if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
+ goto err;
+
+ if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
+ EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
+ goto err;
+ }
+
+ alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
+ ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
+ if (!abuf)
+ goto err;
+ if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
+ goto err;
+ OPENSSL_free(abuf);
+ abuf = NULL;
+ if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
+ goto err;
+ abuf = OPENSSL_malloc(siglen);
+ if (!abuf)
+ goto err;
+ if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
+ goto err;
+
+ if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
+ EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
+ goto err;
+ }
+
+ EVP_MD_CTX_cleanup(&mctx);
+
+ ASN1_STRING_set0(si->enc_digest, abuf, siglen);
+
+ return 1;
+
+ err:
+ if (abuf)
+ OPENSSL_free(abuf);
+ EVP_MD_CTX_cleanup(&mctx);
+ return 0;
+
+}
+
+int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
+ PKCS7 *p7, PKCS7_SIGNER_INFO *si)
+{
+ PKCS7_ISSUER_AND_SERIAL *ias;
+ int ret = 0, i;
+ STACK_OF(X509) *cert;
+ X509 *x509;
+
+ if (PKCS7_type_is_signed(p7)) {
+ cert = p7->d.sign->cert;
+ } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
+ cert = p7->d.signed_and_enveloped->cert;
+ } else {
+ PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
+ goto err;
+ }
+ /* XXXXXXXXXXXXXXXXXXXXXXX */
+ ias = si->issuer_and_serial;
+
+ x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
+
+ /* were we able to find the cert in passed to us */
+ if (x509 == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
+ PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
+ goto err;
+ }
+
+ /* Lets verify */
+ if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
+ PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
+ goto err;
+ }
+ X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
+ i = X509_verify_cert(ctx);
+ if (i <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
+ X509_STORE_CTX_cleanup(ctx);
+ goto err;
+ }
+ X509_STORE_CTX_cleanup(ctx);
+
+ return PKCS7_signatureVerify(bio, p7, si, x509);
+ err:
+ return ret;
+}
+
+int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
+ X509 *x509)
+{
+ ASN1_OCTET_STRING *os;
+ EVP_MD_CTX mdc_tmp, *mdc;
+ int ret = 0, i;
+ int md_type;
+ STACK_OF(X509_ATTRIBUTE) *sk;
+ BIO *btmp;
+ EVP_PKEY *pkey;
+
+ EVP_MD_CTX_init(&mdc_tmp);
+
+ if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
+ PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
+ goto err;
+ }
+
+ md_type = OBJ_obj2nid(si->digest_alg->algorithm);
+
+ btmp = bio;
+ for (;;) {
+ if ((btmp == NULL) ||
+ ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
+ PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
+ PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
+ goto err;
+ }
+ BIO_get_md_ctx(btmp, &mdc);
+ if (mdc == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ if (EVP_MD_CTX_type(mdc) == md_type)
+ break;
+ /*
+ * Workaround for some broken clients that put the signature OID
+ * instead of the digest OID in digest_alg->algorithm
+ */
+ if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
+ break;
+ btmp = BIO_next(btmp);
+ }
+
+ /*
+ * mdc is the digest ctx that we want, unless there are attributes, in
+ * which case the digest is the signed attributes
+ */
+ if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc))
+ goto err;
+
+ sk = si->auth_attr;
+ if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
+ unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
+ unsigned int md_len;
+ int alen;
+ ASN1_OCTET_STRING *message_digest;
+
+ if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len))
+ goto err;
+ message_digest = PKCS7_digest_from_attributes(sk);
+ if (!message_digest) {
+ PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
+ PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
+ goto err;
+ }
+ if ((message_digest->length != (int)md_len) ||
+ (memcmp(message_digest->data, md_dat, md_len))) {
+ PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
+ ret = -1;
+ goto err;
+ }
+
+ if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL))
+ goto err;
+
+ alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
+ ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
+ if (alen <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
+ ret = -1;
+ goto err;
+ }
+ if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
+ goto err;
+
+ OPENSSL_free(abuf);
+ }
+
+ os = si->enc_digest;
+ pkey = X509_get_pubkey(x509);
+ if (!pkey) {
+ ret = -1;
+ goto err;
+ }
+
+ i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey);
+ EVP_PKEY_free(pkey);
+ if (i <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
+ ret = -1;
+ goto err;
+ } else
+ ret = 1;
+ err:
+ EVP_MD_CTX_cleanup(&mdc_tmp);
+ return (ret);
+}
+
+PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)