Initialize num properly.
[openssl.git] / apps / cms.c
index 30dd296..ddc3d5e 100644 (file)
 #undef PROG
 #define PROG cms_main
 static int save_certs(char *signerfile, STACK_OF(X509) *signers);
-static int smime_cb(int ok, X509_STORE_CTX *ctx);
+static int cms_cb(int ok, X509_STORE_CTX *ctx);
 static void receipt_request_print(BIO *out, CMS_ContentInfo *cms);
-static CMS_ReceiptRequest *make_receipt_request(STACK *rr_to, int rr_allorfirst,
-                                                               STACK *rr_from);
+static CMS_ReceiptRequest *make_receipt_request(STACK_OF(OPENSSL_STRING) *rr_to,
+                                               int rr_allorfirst,
+                                       STACK_OF(OPENSSL_STRING) *rr_from);
+static int cms_set_pkey_param(EVP_PKEY_CTX *pctx,
+                       STACK_OF(OPENSSL_STRING) *param);
 
 #define SMIME_OP       0x10
 #define SMIME_IP       0x20
@@ -94,6 +97,17 @@ static CMS_ReceiptRequest *make_receipt_request(STACK *rr_to, int rr_allorfirst,
 #define SMIME_SIGN_RECEIPT     (15 | SMIME_IP | SMIME_OP)
 #define SMIME_VERIFY_RECEIPT   (16 | SMIME_IP)
 
+int verify_err = 0;
+
+typedef struct cms_key_param_st cms_key_param;
+
+struct cms_key_param_st
+       {
+       int idx;
+       STACK_OF(OPENSSL_STRING)*param;
+       cms_key_param *next;
+       };
+
 int MAIN(int, char **);
 
 int MAIN(int argc, char **argv)
@@ -105,9 +119,10 @@ int MAIN(int argc, char **argv)
        const char *inmode = "r", *outmode = "w";
        char *infile = NULL, *outfile = NULL, *rctfile = NULL;
        char *signerfile = NULL, *recipfile = NULL;
-       STACK *sksigners = NULL, *skkeys = NULL;
+       STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL;
        char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
-       const EVP_CIPHER *cipher = NULL;
+       char *certsoutfile = NULL;
+       const EVP_CIPHER *cipher = NULL, *wrap_cipher = NULL;
        CMS_ContentInfo *cms = NULL, *rcms = NULL;
        X509_STORE *store = NULL;
        X509 *cert = NULL, *recip = NULL, *signer = NULL;
@@ -116,8 +131,9 @@ int MAIN(int argc, char **argv)
        BIO *in = NULL, *out = NULL, *indata = NULL, *rctin = NULL;
        int badarg = 0;
        int flags = CMS_DETACHED, noout = 0, print = 0;
+       int verify_retcode = 0;
        int rr_print = 0, rr_allorfirst = -1;
-       STACK *rr_to = NULL, *rr_from = NULL;
+       STACK_OF(OPENSSL_STRING) *rr_to = NULL, *rr_from = NULL;
        CMS_ReceiptRequest *rr = NULL;
        char *to = NULL, *from = NULL, *subject = NULL;
        char *CAfile = NULL, *CApath = NULL;
@@ -131,8 +147,11 @@ int MAIN(int argc, char **argv)
        char *engine=NULL;
 #endif
        unsigned char *secret_key = NULL, *secret_keyid = NULL;
+       unsigned char *pwri_pass = NULL, *pwri_tmp = NULL;
        size_t secret_keylen = 0, secret_keyidlen = 0;
 
+       cms_key_param *key_first = NULL, *key_param = NULL;
+
        ASN1_OBJECT *econtent_type = NULL;
 
        X509_VERIFY_PARAM *vpm = NULL;
@@ -165,6 +184,8 @@ int MAIN(int argc, char **argv)
                        operation = SMIME_RESIGN;
                else if (!strcmp (*args, "-verify"))
                        operation = SMIME_VERIFY;
+               else if (!strcmp (*args, "-verify_retcode"))
+                       verify_retcode = 1;
                else if (!strcmp(*args,"-verify_receipt"))
                        {
                        operation = SMIME_VERIFY_RECEIPT;
@@ -196,6 +217,8 @@ int MAIN(int argc, char **argv)
                                cipher = EVP_des_ede3_cbc();
                else if (!strcmp (*args, "-des")) 
                                cipher = EVP_des_cbc();
+               else if (!strcmp (*args, "-des3-wrap")) 
+                               wrap_cipher = EVP_des_ede3_wrap();
 #endif
 #ifndef OPENSSL_NO_SEED
                else if (!strcmp (*args, "-seed")) 
@@ -216,6 +239,12 @@ int MAIN(int argc, char **argv)
                                cipher = EVP_aes_192_cbc();
                else if (!strcmp(*args,"-aes256"))
                                cipher = EVP_aes_256_cbc();
+               else if (!strcmp(*args,"-aes128-wrap"))
+                               wrap_cipher = EVP_aes_128_wrap();
+               else if (!strcmp(*args,"-aes192-wrap"))
+                               wrap_cipher = EVP_aes_192_wrap();
+               else if (!strcmp(*args,"-aes256-wrap"))
+                               wrap_cipher = EVP_aes_256_wrap();
 #endif
 #ifndef OPENSSL_NO_CAMELLIA
                else if (!strcmp(*args,"-camellia128"))
@@ -225,8 +254,12 @@ int MAIN(int argc, char **argv)
                else if (!strcmp(*args,"-camellia256"))
                                cipher = EVP_camellia_256_cbc();
 #endif
+               else if (!strcmp (*args, "-debug_decrypt")) 
+                               flags |= CMS_DEBUG_DECRYPT;
                else if (!strcmp (*args, "-text")) 
                                flags |= CMS_TEXT;
+               else if (!strcmp (*args, "-asciicrlf")) 
+                               flags |= CMS_ASCIICRLF;
                else if (!strcmp (*args, "-nointern")) 
                                flags |= CMS_NOINTERN;
                else if (!strcmp (*args, "-noverify") 
@@ -274,8 +307,8 @@ int MAIN(int argc, char **argv)
                                goto argerr;
                        args++;
                        if (!rr_from)
-                               rr_from = sk_new_null();
-                       sk_push(rr_from, *args);
+                               rr_from = sk_OPENSSL_STRING_new_null();
+                       sk_OPENSSL_STRING_push(rr_from, *args);
                        }
                else if (!strcmp(*args,"-receipt_request_to"))
                        {
@@ -283,8 +316,8 @@ int MAIN(int argc, char **argv)
                                goto argerr;
                        args++;
                        if (!rr_to)
-                               rr_to = sk_new_null();
-                       sk_push(rr_to, *args);
+                               rr_to = sk_OPENSSL_STRING_new_null();
+                       sk_OPENSSL_STRING_push(rr_to, *args);
                        }
                else if (!strcmp (*args, "-print"))
                                {
@@ -319,6 +352,13 @@ int MAIN(int argc, char **argv)
                                }
                        secret_keyidlen = (size_t)ltmp;
                        }
+               else if (!strcmp(*args,"-pwri_password"))
+                       {
+                       if (!args[1])
+                               goto argerr;
+                       args++;
+                       pwri_pass = (unsigned char *)*args;
+                       }
                else if (!strcmp(*args,"-econtent_type"))
                        {
                        if (!args[1])
@@ -380,13 +420,13 @@ int MAIN(int argc, char **argv)
                        if (signerfile)
                                {
                                if (!sksigners)
-                                       sksigners = sk_new_null();
-                               sk_push(sksigners, signerfile);
+                                       sksigners = sk_OPENSSL_STRING_new_null();
+                               sk_OPENSSL_STRING_push(sksigners, signerfile);
                                if (!keyfile)
                                        keyfile = signerfile;
                                if (!skkeys)
-                                       skkeys = sk_new_null();
-                               sk_push(skkeys, keyfile);
+                                       skkeys = sk_OPENSSL_STRING_new_null();
+                               sk_OPENSSL_STRING_push(skkeys, keyfile);
                                keyfile = NULL;
                                }
                        signerfile = *++args;
@@ -395,7 +435,26 @@ int MAIN(int argc, char **argv)
                        {
                        if (!args[1])
                                goto argerr;
-                       recipfile = *++args;
+                       if (operation == SMIME_ENCRYPT)
+                               {
+                               if (!encerts)
+                                       encerts = sk_X509_new_null();
+                               cert = load_cert(bio_err,*++args,FORMAT_PEM,
+                                               NULL, e,
+                                               "recipient certificate file");
+                               if (!cert)
+                                       goto end;
+                               sk_X509_push(encerts, cert);
+                               cert = NULL;
+                               }
+                       else    
+                               recipfile = *++args;
+                       }
+               else if (!strcmp (*args, "-certsout"))
+                       {
+                       if (!args[1])
+                               goto argerr;
+                       certsoutfile = *++args;
                        }
                else if (!strcmp (*args, "-md"))
                        {
@@ -422,12 +481,12 @@ int MAIN(int argc, char **argv)
                                        goto argerr;
                                        }
                                if (!sksigners)
-                                       sksigners = sk_new_null();
-                               sk_push(sksigners, signerfile);
+                                       sksigners = sk_OPENSSL_STRING_new_null();
+                               sk_OPENSSL_STRING_push(sksigners, signerfile);
                                signerfile = NULL;
                                if (!skkeys)
-                                       skkeys = sk_new_null();
-                               sk_push(skkeys, keyfile);
+                                       skkeys = sk_OPENSSL_STRING_new_null();
+                               sk_OPENSSL_STRING_push(skkeys, keyfile);
                                }
                        keyfile = *++args;
                        }
@@ -437,6 +496,43 @@ int MAIN(int argc, char **argv)
                                goto argerr;
                        keyform = str2fmt(*++args);
                        }
+               else if (!strcmp (*args, "-keyopt"))
+                       {
+                       int keyidx = -1;
+                       if (!args[1])
+                               goto argerr;
+                       if (operation == SMIME_ENCRYPT)
+                               {
+                               if (encerts)
+                                       keyidx += sk_X509_num(encerts);
+                               }
+                       else
+                               {
+                               if (keyfile || signerfile)
+                                       keyidx++;
+                               if (skkeys)
+                                       keyidx += sk_OPENSSL_STRING_num(skkeys);
+                               }
+                       if (keyidx < 0)
+                               {
+                               BIO_printf(bio_err, "No key specified\n");
+                               goto argerr;
+                               }
+                       if (key_param == NULL || key_param->idx != keyidx)
+                               {
+                               cms_key_param *nparam;
+                               nparam = OPENSSL_malloc(sizeof(cms_key_param));
+                               nparam->idx = keyidx;
+                               nparam->param = sk_OPENSSL_STRING_new_null();
+                               nparam->next = NULL;
+                               if (key_first == NULL)
+                                       key_first = nparam;
+                               else
+                                       key_param->next = nparam;
+                               key_param = nparam;
+                               }
+                       sk_OPENSSL_STRING_push(key_param->param, *++args);
+                       }
                else if (!strcmp (*args, "-rctform"))
                        {
                        if (!args[1])
@@ -526,13 +622,13 @@ int MAIN(int argc, char **argv)
                if (signerfile)
                        {
                        if (!sksigners)
-                               sksigners = sk_new_null();
-                       sk_push(sksigners, signerfile);
+                               sksigners = sk_OPENSSL_STRING_new_null();
+                       sk_OPENSSL_STRING_push(sksigners, signerfile);
                        if (!skkeys)
-                               skkeys = sk_new_null();
+                               skkeys = sk_OPENSSL_STRING_new_null();
                        if (!keyfile)
                                keyfile = signerfile;
-                       sk_push(skkeys, keyfile);
+                       sk_OPENSSL_STRING_push(skkeys, keyfile);
                        }
                if (!sksigners)
                        {
@@ -546,7 +642,7 @@ int MAIN(int argc, char **argv)
 
        else if (operation == SMIME_DECRYPT)
                {
-               if (!recipfile && !keyfile && !secret_key)
+               if (!recipfile && !keyfile && !secret_key && !pwri_pass)
                        {
                        BIO_printf(bio_err, "No recipient certificate or key specified\n");
                        badarg = 1;
@@ -554,7 +650,7 @@ int MAIN(int argc, char **argv)
                }
        else if (operation == SMIME_ENCRYPT)
                {
-               if (!*args && !secret_key)
+               if (!*args && !secret_key && !pwri_pass && !encerts)
                        {
                        BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
                        badarg = 1;
@@ -567,7 +663,7 @@ int MAIN(int argc, char **argv)
        if (badarg)
                {
                argerr:
-               BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
+               BIO_printf (bio_err, "Usage cms [options] cert.pem ...\n");
                BIO_printf (bio_err, "where options are\n");
                BIO_printf (bio_err, "-encrypt       encrypt message\n");
                BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
@@ -602,13 +698,15 @@ int MAIN(int argc, char **argv)
                BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
                BIO_printf (bio_err, "-binary        don't translate message to text\n");
                BIO_printf (bio_err, "-certfile file other certificates file\n");
+               BIO_printf (bio_err, "-certsout file certificate output file\n");
                BIO_printf (bio_err, "-signer file   signer certificate file\n");
                BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
-               BIO_printf (bio_err, "-skeyid        use subject key identifier\n");
+               BIO_printf (bio_err, "-keyid         use subject key identifier\n");
                BIO_printf (bio_err, "-in file       input file\n");
                BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
                BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
                BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
+               BIO_printf (bio_err, "-keyopt nm:v   set public key parameters\n");
                BIO_printf (bio_err, "-out file      output file\n");
                BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
                BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
@@ -690,11 +788,11 @@ int MAIN(int argc, char **argv)
 
                if (secret_key && !secret_keyid)
                        {
-                       BIO_printf(bio_err, "No sectre key id\n");
+                       BIO_printf(bio_err, "No secret key id\n");
                        goto end;
                        }
 
-               if (*args)
+               if (*args && !encerts)
                        encerts = sk_X509_new_null();
                while (*args)
                        {
@@ -797,6 +895,20 @@ int MAIN(int argc, char **argv)
                                goto end;
                                }
                        }
+               if (certsoutfile)
+                       {
+                       STACK_OF(X509) *allcerts;
+                       allcerts = CMS_get1_certs(cms);
+                       if (!save_certs(certsoutfile, allcerts))
+                               {
+                               BIO_printf(bio_err,
+                                               "Error writing certs to %s\n",
+                                                               certsoutfile);
+                               ret = 5;
+                               goto end;
+                               }
+                       sk_X509_pop_free(allcerts, X509_free);
+                       }
                }
 
        if (rctfile)
@@ -852,7 +964,7 @@ int MAIN(int argc, char **argv)
                {
                if (!(store = setup_verify(bio_err, CAfile, CApath)))
                        goto end;
-               X509_STORE_set_verify_cb_func(store, smime_cb);
+               X509_STORE_set_verify_cb(store, cms_cb);
                if (vpm)
                        X509_STORE_set1_param(store, vpm);
                }
@@ -874,10 +986,45 @@ int MAIN(int argc, char **argv)
                }
        else if (operation == SMIME_ENCRYPT)
                {
+               int i;
                flags |= CMS_PARTIAL;
-               cms = CMS_encrypt(encerts, in, cipher, flags);
+               cms = CMS_encrypt(NULL, in, cipher, flags);
                if (!cms)
                        goto end;
+               for (i = 0; i < sk_X509_num(encerts); i++)
+                       {
+                       CMS_RecipientInfo *ri;
+                       cms_key_param *kparam;
+                       int tflags = flags;
+                       X509 *x = sk_X509_value(encerts, i);
+                       for(kparam = key_first; kparam; kparam = kparam->next)
+                               {
+                               if(kparam->idx == i)
+                                       {
+                                       tflags |= CMS_KEY_PARAM;
+                                       break;
+                                       }
+                               }
+                       ri = CMS_add1_recipient_cert(cms, x, tflags);
+                       if (!ri)
+                               goto end;
+                       if (kparam)
+                               {
+                               EVP_PKEY_CTX *pctx;
+                               pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
+                               if (!cms_set_pkey_param(pctx, kparam->param))
+                                       goto end;
+                               }
+                       if (CMS_RecipientInfo_type(ri) == CMS_RECIPINFO_AGREE
+                               && wrap_cipher)
+                               {
+                               EVP_CIPHER_CTX *wctx;
+                               wctx = CMS_RecipientInfo_kari_get0_ctx(ri);
+                               EVP_EncryptInit_ex(wctx, wrap_cipher,
+                                                       NULL, NULL, NULL);
+                               }
+                       }
+
                if (secret_key)
                        {
                        if (!CMS_add0_recipient_key(cms, NID_undef, 
@@ -889,9 +1036,20 @@ int MAIN(int argc, char **argv)
                        secret_key = NULL;
                        secret_keyid = NULL;
                        }
+               if (pwri_pass)
+                       {
+                       pwri_tmp = (unsigned char *)BUF_strdup((char *)pwri_pass);
+                       if (!pwri_tmp)
+                               goto end;
+                       if (!CMS_add0_recipient_password(cms,
+                                               -1, NID_undef, NID_undef,
+                                                pwri_tmp, -1, NULL))
+                               goto end;
+                       pwri_tmp = NULL;
+                       }
                if (!(flags & CMS_STREAM))
                        {
-                       if (!CMS_final(cms, in, flags))
+                       if (!CMS_final(cms, in, NULL, flags))
                                goto end;
                        }
                }
@@ -952,11 +1110,14 @@ int MAIN(int argc, char **argv)
                        }
                else
                        flags |= CMS_REUSE_DIGEST;
-               for (i = 0; i < sk_num(sksigners); i++)
+               for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++)
                        {
                        CMS_SignerInfo *si;
-                       signerfile = sk_value(sksigners, i);
-                       keyfile = sk_value(skkeys, i);
+                       cms_key_param *kparam;
+                       int tflags = flags;
+                       signerfile = sk_OPENSSL_STRING_value(sksigners, i);
+                       keyfile = sk_OPENSSL_STRING_value(skkeys, i);
+
                        signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
                                        e, "signer certificate");
                        if (!signer)
@@ -965,9 +1126,24 @@ int MAIN(int argc, char **argv)
                               "signing key file");
                        if (!key)
                                goto end;
-                       si = CMS_add1_signer(cms, signer, key, sign_md, flags);
+                       for(kparam = key_first; kparam; kparam = kparam->next)
+                               {
+                               if(kparam->idx == i)
+                                       {
+                                       tflags |= CMS_KEY_PARAM;
+                                       break;
+                                       }
+                               }
+                       si = CMS_add1_signer(cms, signer, key, sign_md, tflags);
                        if (!si)
                                goto end;
+                       if (kparam)
+                               {
+                               EVP_PKEY_CTX *pctx;
+                               pctx = CMS_SignerInfo_get0_pkey_ctx(si);
+                               if (!cms_set_pkey_param(pctx, kparam->param))
+                                       goto end;
+                               }
                        if (rr && !CMS_add1_ReceiptRequest(si, rr))
                                goto end;
                        X509_free(signer);
@@ -978,7 +1154,7 @@ int MAIN(int argc, char **argv)
                /* If not streaming or resigning finalize structure */
                if ((operation == SMIME_SIGN) && !(flags & CMS_STREAM))
                        {
-                       if (!CMS_final(cms, in, flags))
+                       if (!CMS_final(cms, in, NULL, flags))
                                goto end;
                        }
                }
@@ -992,6 +1168,8 @@ int MAIN(int argc, char **argv)
        ret = 4;
        if (operation == SMIME_DECRYPT)
                {
+               if (flags & CMS_DEBUG_DECRYPT)
+                       CMS_decrypt(cms, NULL, NULL, NULL, NULL, flags);
 
                if (secret_key)
                        {
@@ -1015,6 +1193,16 @@ int MAIN(int argc, char **argv)
                                }
                        }
 
+               if (pwri_pass)
+                       {
+                       if (!CMS_decrypt_set1_password(cms, pwri_pass, -1))
+                               {
+                               BIO_puts(bio_err,
+                                       "Error decrypting CMS using password\n");
+                               goto end;
+                               }
+                       }
+
                if (!CMS_decrypt(cms, NULL, NULL, indata, out, flags))
                        {
                        BIO_printf(bio_err, "Error decrypting CMS structure\n");
@@ -1054,6 +1242,8 @@ int MAIN(int argc, char **argv)
                else
                        {
                        BIO_printf(bio_err, "Verification failure\n");
+                       if (verify_retcode)
+                               ret = verify_err + 32;
                        goto end;
                        }
                if (signerfile)
@@ -1130,21 +1320,31 @@ end:
        if (vpm)
                X509_VERIFY_PARAM_free(vpm);
        if (sksigners)
-               sk_free(sksigners);
+               sk_OPENSSL_STRING_free(sksigners);
        if (skkeys)
-               sk_free(skkeys);
+               sk_OPENSSL_STRING_free(skkeys);
        if (secret_key)
                OPENSSL_free(secret_key);
        if (secret_keyid)
                OPENSSL_free(secret_keyid);
+       if (pwri_tmp)
+               OPENSSL_free(pwri_tmp);
        if (econtent_type)
                ASN1_OBJECT_free(econtent_type);
        if (rr)
                CMS_ReceiptRequest_free(rr);
        if (rr_to)
-               sk_free(rr_to);
+               sk_OPENSSL_STRING_free(rr_to);
        if (rr_from)
-               sk_free(rr_from);
+               sk_OPENSSL_STRING_free(rr_from);
+       for(key_param = key_first; key_param;)
+               {
+               cms_key_param *tparam;
+               sk_OPENSSL_STRING_free(key_param->param);
+               tparam = key_param->next;
+               OPENSSL_free(key_param);
+               key_param = tparam;
+               }
        X509_STORE_free(store);
        X509_free(cert);
        X509_free(recip);
@@ -1177,12 +1377,14 @@ static int save_certs(char *signerfile, STACK_OF(X509) *signers)
 
 /* Minimal callback just to output policy info (if any) */
 
-static int smime_cb(int ok, X509_STORE_CTX *ctx)
+static int cms_cb(int ok, X509_STORE_CTX *ctx)
        {
        int error;
 
        error = X509_STORE_CTX_get_error(ctx);
 
+       verify_err = error;
+
        if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
                && ((error != X509_V_OK) || (ok != 2)))
                return ok;
@@ -1264,7 +1466,7 @@ static void receipt_request_print(BIO *out, CMS_ContentInfo *cms)
                }
        }
 
-static STACK_OF(GENERAL_NAMES) *make_names_stack(STACK *ns)
+static STACK_OF(GENERAL_NAMES) *make_names_stack(STACK_OF(OPENSSL_STRING) *ns)
        {
        int i;
        STACK_OF(GENERAL_NAMES) *ret;
@@ -1273,9 +1475,9 @@ static STACK_OF(GENERAL_NAMES) *make_names_stack(STACK *ns)
        ret = sk_GENERAL_NAMES_new_null();
        if (!ret)
                goto err;
-       for (i = 0; i < sk_num(ns); i++)
+       for (i = 0; i < sk_OPENSSL_STRING_num(ns); i++)
                {
-               char *str = sk_value(ns, i);
+               char *str = sk_OPENSSL_STRING_value(ns, i);
                gen = a2i_GENERAL_NAME(NULL, NULL, NULL, GEN_EMAIL, str, 0);
                if (!gen)
                        goto err;
@@ -1303,8 +1505,9 @@ static STACK_OF(GENERAL_NAMES) *make_names_stack(STACK *ns)
        }
 
 
-static CMS_ReceiptRequest *make_receipt_request(STACK *rr_to, int rr_allorfirst,
-                                                               STACK *rr_from)
+static CMS_ReceiptRequest *make_receipt_request(STACK_OF(OPENSSL_STRING) *rr_to,
+                                               int rr_allorfirst,
+                                               STACK_OF(OPENSSL_STRING) *rr_from)
        {
        STACK_OF(GENERAL_NAMES) *rct_to, *rct_from;
        CMS_ReceiptRequest *rr;
@@ -1326,4 +1529,25 @@ static CMS_ReceiptRequest *make_receipt_request(STACK *rr_to, int rr_allorfirst,
        return NULL;
        }
 
+static int cms_set_pkey_param(EVP_PKEY_CTX *pctx,
+                       STACK_OF(OPENSSL_STRING) *param)
+       {
+       char *keyopt;
+       int i;
+       if (sk_OPENSSL_STRING_num(param) <= 0)
+               return 1;
+       for (i = 0; i < sk_OPENSSL_STRING_num(param); i++)
+               {
+               keyopt = sk_OPENSSL_STRING_value(param, i);
+               if (pkey_ctrl_string(pctx, keyopt) <= 0)
+                       {
+                       BIO_printf(bio_err, "parameter error \"%s\"\n",
+                                               keyopt);
+                       ERR_print_errors(bio_err);
+                       return 0;
+                       }
+               }
+       return 1;
+       }
+
 #endif