Add X509_CRL_up_ref function
[openssl.git] / crypto / pkcs7 / pk7_lib.c
index 7bba23e3d4bcb420083f16c8765443f4b5485593..d8347419f440ef6d56d1ee2676315dc17d7729ed 100644 (file)
@@ -5,21 +5,21 @@
  * This package is an SSL implementation written
  * by Eric Young (eay@cryptsoft.com).
  * The implementation was written so as to conform with Netscapes SSL.
- * 
+ *
  * This library is free for commercial and non-commercial use as long as
  * the following conditions are aheared to.  The following conditions
  * apply to all code found in this distribution, be it the RC4, RSA,
  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  * included with this distribution is covered by the same copyright terms
  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
+ *
  * Copyright remains Eric Young's, and as such any Copyright notices in
  * the code are not to be removed.
  * If this package is used in a product, Eric Young should be given attribution
  * as the author of the parts of the library used.
  * This can be in the form of a textual message at program startup or
  * in documentation (online or textual) provided with the package.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *     Eric Young (eay@cryptsoft.com)"
  *    The word 'cryptographic' can be left out if the rouines from the library
  *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
+ * 4. If you include any Windows specific code (or a derivative thereof) from
  *    the apps directory (application code) you must include an acknowledgement:
  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -49,7 +49,7 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- * 
+ *
  * The licence and distribution terms for any publically available version or
  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  * copied and put under another distribution licence
  */
 
 #include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
 #include <openssl/objects.h>
 #include <openssl/x509.h>
+#include "internal/asn1_int.h"
 
 long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
-       {
-       int nid;
-       long ret;
-
-       nid=OBJ_obj2nid(p7->type);
-
-       switch (cmd)
-               {
-       case PKCS7_OP_SET_DETACHED_SIGNATURE:
-               if (nid == NID_pkcs7_signed)
-                       {
-                       ret=p7->detached=(int)larg;
-                       }
-               else
-                       {
-                       PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
-                       ret=0;
-                       }
-               break;
-       case PKCS7_OP_GET_DETACHED_SIGNATURE:
-               if (nid == NID_pkcs7_signed)
-                       {
-                       ret=p7->detached;
-                       }
-               else
-                       {
-                       PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
-                       ret=0;
-                       }
-                       
-               break;
-       default:
-               PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_UNKNOWN_OPERATION);
-               ret=0;
-               }
-       return(ret);
-       }
+{
+    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) {
+            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 {
+            PKCS7err(PKCS7_F_PKCS7_CTRL,
+                     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 || !p7->d.sign->contents->d.ptr)
+                ret = 1;
+            else
+                ret = 0;
+
+            p7->detached = ret;
+        } else {
+            PKCS7err(PKCS7_F_PKCS7_CTRL,
+                     PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
+            ret = 0;
+        }
+
+        break;
+    default:
+        PKCS7err(PKCS7_F_PKCS7_CTRL, 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:
-       if (ret != NULL) PKCS7_free(ret);
-       return(0);
-       }
+{
+    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:
-               if (p7->d.sign->contents != NULL)
-                       PKCS7_content_free(p7->d.sign->contents);
-               p7->d.sign->contents=p7_data;
-               break;
-       case NID_pkcs7_digest:
-       case NID_pkcs7_data:
-       case NID_pkcs7_enveloped:
-       case NID_pkcs7_signedAndEnveloped:
-       case NID_pkcs7_encrypted:
-       default:
-               PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
-               goto err;
-               }
-       return(1);
-err:
-       return(0);
-       }
+{
+    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:
+        PKCS7err(PKCS7_F_PKCS7_SET_CONTENT, 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;
-               ASN1_INTEGER_set(p7->d.sign->version,1);
-               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;
-               ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
-/*             p7->d.signed_and_enveloped->enc_data->content_type=
-                       OBJ_nid2obj(NID_pkcs7_encrypted);*/
-                       
-               break;
-       case NID_pkcs7_enveloped:
-               p7->type=obj;
-               if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
-                       == NULL) goto err;
-               ASN1_INTEGER_set(p7->d.enveloped->version,0);
-               break;
-       case NID_pkcs7_digest:
-       case NID_pkcs7_encrypted:
-       default:
-               PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
-               goto err;
-               }
-       return(1);
-err:
-       return(0);
-       }
+{
+    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;
+        ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1);
+        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:
+        PKCS7err(PKCS7_F_PKCS7_SET_TYPE, 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,nid;
-       X509_ALGOR *alg;
-       STACK *signer_sk;
-       STACK *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:
-               PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
-               return(0);
-               }
-
-       nid=OBJ_obj2nid(psi->digest_alg->algorithm);
-
-       /* If the digest is not currently listed, add it */
-       j=0;
-       for (i=0; i<sk_num(md_sk); i++)
-               {
-               alg=(X509_ALGOR *)sk_value(md_sk,i);
-               if (OBJ_obj2nid(alg->algorithm) == nid)
-                       {
-                       j=1;
-                       break;
-                       }
-               }
-       if (!j) /* we need to add another algorithm */
-               {
-               alg=X509_ALGOR_new();
-               alg->algorithm=OBJ_nid2obj(nid);
-               sk_push(md_sk,(char *)alg);
-               }
-
-       sk_push(signer_sk,(char *)psi);
-       return(1);
-       }
+{
+    int i, j, nid;
+    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:
+        PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER, PKCS7_R_WRONG_CONTENT_TYPE);
+        return (0);
+    }
+
+    nid = OBJ_obj2nid(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_obj2nid(alg->algorithm) == nid) {
+            j = 1;
+            break;
+        }
+    }
+    if (!j) {                   /* we need to add another algorithm */
+        if ((alg = X509_ALGOR_new()) == NULL
+            || (alg->parameter = ASN1_TYPE_new()) == NULL) {
+            X509_ALGOR_free(alg);
+            PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
+            return (0);
+        }
+        alg->algorithm = OBJ_nid2obj(nid);
+        alg->parameter->type = V_ASN1_NULL;
+        if (!sk_X509_ALGOR_push(md_sk, alg)) {
+            X509_ALGOR_free(alg);
+            return 0;
+        }
+    }
+
+    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:
-               PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
-               return(0);
-               }
-
-       if (*sk == NULL)
-               *sk=sk_X509_new_null();
-       CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
-       sk_X509_push(*sk,x509);
-       return(1);
-       }
+{
+    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:
+        PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE, PKCS7_R_WRONG_CONTENT_TYPE);
+        return (0);
+    }
+
+    if (*sk == NULL)
+        *sk = sk_X509_new_null();
+    if (*sk == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+    CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509);
+    if (!sk_X509_push(*sk, x509)) {
+        X509_free(x509);
+        return 0;
+    }
+    return (1);
+}
 
 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
-       {
-       int i;
-       STACK **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:
-               PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
-               return(0);
-               }
-
-       if (*sk == NULL)
-               *sk=sk_new_null();
-
-       CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
-       sk_push(*sk,(char *)crl);
-       return(1);
-       }
+{
+    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:
+        PKCS7err(PKCS7_F_PKCS7_ADD_CRL, PKCS7_R_WRONG_CONTENT_TYPE);
+        return (0);
+    }
+
+    if (*sk == NULL)
+        *sk = sk_X509_CRL_new_null();
+    if (*sk == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_ADD_CRL, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+
+    X509_CRL_up_ref(crl);
+    if (!sk_X509_CRL_push(*sk, crl)) {
+        X509_CRL_free(crl);
+        return 0;
+    }
+    return (1);
+}
 
 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
-            EVP_MD *dgst)
-       {
-       /* We now need to add another PKCS7_SIGNER_INFO entry */
-       ASN1_INTEGER_set(p7i->version,1);
-       X509_NAME_set(&p7i->issuer_and_serial->issuer,
-               X509_get_issuer_name(x509));
-
-       /* 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);
-       p7i->issuer_and_serial->serial=
-               ASN1_INTEGER_dup(X509_get_serialNumber(x509));
-
-       /* lets keep the pkey around for a while */
-       CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
-       p7i->pkey=pkey;
-
-       /* Set the algorithms */
-       if (pkey->type == EVP_PKEY_DSA)
-               p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
-       else    
-               p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
-
-       p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
-
-       if (p7i->digest_enc_alg->parameter != NULL)
-               ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
-       if ((p7i->digest_enc_alg->parameter=ASN1_TYPE_new()) == NULL)
-               goto err;
-       p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
-
-       return(1);
-err:
-       return(0);
-       }
+                          const EVP_MD *dgst)
+{
+    int ret;
+
+    /* We now need to add another PKCS7_SIGNER_INFO entry */
+    if (!ASN1_INTEGER_set(p7i->version, 1))
+        goto err;
+    if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
+                       X509_get_issuer_name(x509)))
+        goto err;
+
+    /*
+     * 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_get_serialNumber(x509))))
+        goto err;
+
+    /* lets keep the pkey around for a while */
+    CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
+    p7i->pkey = pkey;
+
+    /* Set the algorithms */
+
+    X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_type(dgst)),
+                    V_ASN1_NULL, NULL);
+
+    if (pkey->ameth && pkey->ameth->pkey_ctrl) {
+        ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN, 0, p7i);
+        if (ret > 0)
+            return 1;
+        if (ret != -2) {
+            PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
+                     PKCS7_R_SIGNING_CTRL_FAILURE);
+            return 0;
+        }
+    }
+    PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
+             PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
+ err:
+    return 0;
+}
 
 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
-            EVP_MD *dgst)
-       {
-       PKCS7_SIGNER_INFO *si;
-
-       if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
-       if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
-       if (!PKCS7_add_signer(p7,si)) goto err;
-       return(si);
-err:
-       return(NULL);
-       }
-
-STACK *PKCS7_get_signer_info(PKCS7 *p7)
-       {
-       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);
-       }
+                                       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) {
+            PKCS7err(PKCS7_F_PKCS7_ADD_SIGNATURE, 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))
+        goto err;
+    if (!PKCS7_add_signer(p7, si))
+        goto err;
+    return (si);
+ err:
+    PKCS7_SIGNER_INFO_free(si);
+    return (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) {
+            PKCS7err(PKCS7_F_PKCS7_SET_DIGEST, ERR_R_MALLOC_FAILURE);
+            return 0;
+        }
+        p7->d.digest->md->parameter->type = V_ASN1_NULL;
+        p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
+        return 1;
+    }
+
+    PKCS7err(PKCS7_F_PKCS7_SET_DIGEST, 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)) goto err;
-       if (!PKCS7_add_recipient_info(p7,ri)) goto err;
-       return(ri);
-err:
-       return(NULL);
-       }
+{
+    PKCS7_RECIP_INFO *ri;
+
+    if ((ri = PKCS7_RECIP_INFO_new()) == NULL)
+        goto err;
+    if (!PKCS7_RECIP_INFO_set(ri, x509))
+        goto err;
+    if (!PKCS7_add_recipient_info(p7, ri))
+        goto err;
+    return ri;
+ err:
+    PKCS7_RECIP_INFO_free(ri);
+    return NULL;
+}
 
 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
-       {
-       int i;
-       STACK *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:
-               PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
-               return(0);
-               }
-
-       sk_push(sk,(char *)ri);
-       return(1);
-       }
+{
+    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:
+        PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,
+                 PKCS7_R_WRONG_CONTENT_TYPE);
+        return (0);
+    }
+
+    if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
+        return 0;
+    return (1);
+}
 
 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
-       {
-       ASN1_INTEGER_set(p7i->version,0);
-       X509_NAME_set(&p7i->issuer_and_serial->issuer,
-               X509_get_issuer_name(x509));
-
-       ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
-       p7i->issuer_and_serial->serial=
-               ASN1_INTEGER_dup(X509_get_serialNumber(x509));
-
-       X509_ALGOR_free(p7i->key_enc_algor);
-       p7i->key_enc_algor=(X509_ALGOR *)ASN1_dup(i2d_X509_ALGOR,
-               (char *(*)())d2i_X509_ALGOR,
-               (char *)x509->cert_info->key->algor);
-
-       CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
-       p7i->cert=x509;
-
-       return(1);
-       }
+{
+    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_get_serialNumber(x509))))
+        return 0;
+
+    pkey = X509_get_pubkey(x509);
+
+    if (!pkey || !pkey->ameth || !pkey->ameth->pkey_ctrl) {
+        PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
+                 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) {
+        PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
+                 PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
+        goto err;
+    }
+    if (ret <= 0) {
+        PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
+                 PKCS7_R_ENCRYPTION_CTRL_FAILURE);
+        goto err;
+    }
+
+    EVP_PKEY_free(pkey);
+
+    CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509);
+    p7i->cert = x509;
+
+    return 1;
+
+ err:
+    EVP_PKEY_free(pkey);
+    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, 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:
-               PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
-               return(0);
-               }
-
-       ec->algorithm->algorithm=OBJ_nid2obj(EVP_CIPHER_nid(cipher));
-       return(ec->algorithm->algorithm != NULL);
-       }
-
+{
+    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:
+        PKCS7err(PKCS7_F_PKCS7_SET_CIPHER, PKCS7_R_WRONG_CONTENT_TYPE);
+        return (0);
+    }
+
+    /* Check cipher OID exists and has data in it */
+    i = EVP_CIPHER_type(cipher);
+    if (i == NID_undef) {
+        PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,
+                 PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
+        return (0);
+    }
+
+    ec->cipher = cipher;
+    return 1;
+}
+
+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;
+}