GH601: Various spelling fixes.
[openssl.git] / crypto / cms / cms_env.c
index 796b0d3..3b065ae 100644 (file)
@@ -1,5 +1,5 @@
-/* crypto/cms/cms_env.c */
-/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project.
  */
 /* ====================================================================
@@ -10,7 +10,7 @@
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
+ *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  * ====================================================================
  */
 
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
 #include <openssl/asn1t.h>
 #include <openssl/pem.h>
 #include <openssl/x509v3.h>
 #include <openssl/err.h>
 #include <openssl/cms.h>
 #include <openssl/rand.h>
+#include <openssl/aes.h>
 #include "cms_lcl.h"
-#include "asn1_locl.h"
+#include "internal/asn1_int.h"
+#include "internal/evp_int.h"
 
 /* CMS EnvelopedData Utilities */
 
-DECLARE_ASN1_ITEM(CMS_EnvelopedData)
-DECLARE_ASN1_ITEM(CMS_RecipientInfo)
-DECLARE_ASN1_ITEM(CMS_KeyTransRecipientInfo)
-
-DECLARE_STACK_OF(CMS_RecipientInfo)
-
-static CMS_EnvelopedData *cms_get0_enveloped(CMS_ContentInfo *cms)
-       {
-       if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_enveloped)
-               {
-               CMSerr(CMS_F_CMS_GET0_ENVELOPED,
-                               CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA);
-               return NULL;
-               }
-       return cms->d.envelopedData;
-       }
+CMS_EnvelopedData *cms_get0_enveloped(CMS_ContentInfo *cms)
+{
+    if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_enveloped) {
+        CMSerr(CMS_F_CMS_GET0_ENVELOPED,
+               CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA);
+        return NULL;
+    }
+    return cms->d.envelopedData;
+}
 
 static CMS_EnvelopedData *cms_enveloped_data_init(CMS_ContentInfo *cms)
-       {
-       if (cms->d.other == NULL)
-               {
-               cms->d.envelopedData = M_ASN1_new_of(CMS_EnvelopedData);
-               if (!cms->d.envelopedData)
-                       {
-                       CMSerr(CMS_F_CMS_ENVELOPED_DATA_INIT,
-                                                       ERR_R_MALLOC_FAILURE);
-                       return NULL;
-                       }
-               cms->d.envelopedData->version = 0;
-               cms->d.envelopedData->encryptedContentInfo->contentType =
-                                               OBJ_nid2obj(NID_pkcs7_data);
-               ASN1_OBJECT_free(cms->contentType);
-               cms->contentType = OBJ_nid2obj(NID_pkcs7_enveloped);
-               return cms->d.envelopedData;
-               }
-       return cms_get0_enveloped(cms);
-       }
+{
+    if (cms->d.other == NULL) {
+        cms->d.envelopedData = M_ASN1_new_of(CMS_EnvelopedData);
+        if (!cms->d.envelopedData) {
+            CMSerr(CMS_F_CMS_ENVELOPED_DATA_INIT, ERR_R_MALLOC_FAILURE);
+            return NULL;
+        }
+        cms->d.envelopedData->version = 0;
+        cms->d.envelopedData->encryptedContentInfo->contentType =
+            OBJ_nid2obj(NID_pkcs7_data);
+        ASN1_OBJECT_free(cms->contentType);
+        cms->contentType = OBJ_nid2obj(NID_pkcs7_enveloped);
+        return cms->d.envelopedData;
+    }
+    return cms_get0_enveloped(cms);
+}
+
+int cms_env_asn1_ctrl(CMS_RecipientInfo *ri, int cmd)
+{
+    EVP_PKEY *pkey;
+    int i;
+    if (ri->type == CMS_RECIPINFO_TRANS)
+        pkey = ri->d.ktri->pkey;
+    else if (ri->type == CMS_RECIPINFO_AGREE) {
+        EVP_PKEY_CTX *pctx = ri->d.kari->pctx;
+        if (!pctx)
+            return 0;
+        pkey = EVP_PKEY_CTX_get0_pkey(pctx);
+        if (!pkey)
+            return 0;
+    } else
+        return 0;
+    if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
+        return 1;
+    i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_ENVELOPE, cmd, ri);
+    if (i == -2) {
+        CMSerr(CMS_F_CMS_ENV_ASN1_CTRL,
+               CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
+        return 0;
+    }
+    if (i <= 0) {
+        CMSerr(CMS_F_CMS_ENV_ASN1_CTRL, CMS_R_CTRL_FAILURE);
+        return 0;
+    }
+    return 1;
+}
 
 STACK_OF(CMS_RecipientInfo) *CMS_get0_RecipientInfos(CMS_ContentInfo *cms)
-       {
-       CMS_EnvelopedData *env;
-       env = cms_enveloped_data_init(cms);
-       if (!env)
-               return NULL;
-       return env->recipientInfos;
-       }
+{
+    CMS_EnvelopedData *env;
+    env = cms_get0_enveloped(cms);
+    if (!env)
+        return NULL;
+    return env->recipientInfos;
+}
 
 int CMS_RecipientInfo_type(CMS_RecipientInfo *ri)
-       {
-       return ri->type;
-       }
-
-/* Add a recipient certificate. For now only handle key transport.
- * If we ever handle key agreement will need updating.
+{
+    return ri->type;
+}
+
+EVP_PKEY_CTX *CMS_RecipientInfo_get0_pkey_ctx(CMS_RecipientInfo *ri)
+{
+    if (ri->type == CMS_RECIPINFO_TRANS)
+        return ri->d.ktri->pctx;
+    else if (ri->type == CMS_RECIPINFO_AGREE)
+        return ri->d.kari->pctx;
+    return NULL;
+}
+
+CMS_ContentInfo *CMS_EnvelopedData_create(const EVP_CIPHER *cipher)
+{
+    CMS_ContentInfo *cms;
+    CMS_EnvelopedData *env;
+    cms = CMS_ContentInfo_new();
+    if (cms == NULL)
+        goto merr;
+    env = cms_enveloped_data_init(cms);
+    if (env == NULL)
+        goto merr;
+    if (!cms_EncryptedContent_init(env->encryptedContentInfo,
+                                   cipher, NULL, 0))
+        goto merr;
+    return cms;
+ merr:
+    CMS_ContentInfo_free(cms);
+    CMSerr(CMS_F_CMS_ENVELOPEDDATA_CREATE, ERR_R_MALLOC_FAILURE);
+    return NULL;
+}
+
+/* Key Transport Recipient Info (KTRI) routines */
+
+/* Initialise a ktri based on passed certificate and key */
+
+static int cms_RecipientInfo_ktri_init(CMS_RecipientInfo *ri, X509 *recip,
+                                       EVP_PKEY *pk, unsigned int flags)
+{
+    CMS_KeyTransRecipientInfo *ktri;
+    int idtype;
+
+    ri->d.ktri = M_ASN1_new_of(CMS_KeyTransRecipientInfo);
+    if (!ri->d.ktri)
+        return 0;
+    ri->type = CMS_RECIPINFO_TRANS;
+
+    ktri = ri->d.ktri;
+
+    if (flags & CMS_USE_KEYID) {
+        ktri->version = 2;
+        idtype = CMS_RECIPINFO_KEYIDENTIFIER;
+    } else {
+        ktri->version = 0;
+        idtype = CMS_RECIPINFO_ISSUER_SERIAL;
+    }
+
+    /*
+     * Not a typo: RecipientIdentifier and SignerIdentifier are the same
+     * structure.
+     */
+
+    if (!cms_set1_SignerIdentifier(ktri->rid, recip, idtype))
+        return 0;
+
+    X509_up_ref(recip);
+    CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
+    ktri->pkey = pk;
+    ktri->recip = recip;
+
+    if (flags & CMS_KEY_PARAM) {
+        ktri->pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
+        if (ktri->pctx == NULL)
+            return 0;
+        if (EVP_PKEY_encrypt_init(ktri->pctx) <= 0)
+            return 0;
+    } else if (!cms_env_asn1_ctrl(ri, 0))
+        return 0;
+    return 1;
+}
+
+/*
+ * Add a recipient certificate using appropriate type of RecipientInfo
  */
-#if 0 /* currently unused/undeclared */
+
 CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms,
-                                       X509 *recip, unsigned int flags)
-       {
-       CMS_RecipientInfo *ri = NULL;
-       CMS_KeyTransRecipientInfo *ktri;
-       CMS_EnvelopedData *env;
-       EVP_PKEY *pk = NULL;
-       int i, type;
-       /* Init enveloped data */
-       env = cms_enveloped_data_init(cms);
-       if (!env)
-               goto err;
-
-       /* Initialized recipient info */
-       ri = M_ASN1_new_of(CMS_RecipientInfo);
-       if (!ri)
-               goto merr;
-
-       /* Initialize and add key transrport recipient info */
-
-       ri->d.ktri = M_ASN1_new_of(CMS_KeyTransRecipientInfo);
-       if (!ri->d.ktri)
-               goto merr;
-       ri->type = CMS_RECIPINFO_TRANS;
-
-       ktri = ri->d.ktri;
-
-       X509_check_purpose(recip, -1, -1);
-       pk = X509_get_pubkey(recip);
-       if (!pk)
-               {
-               CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
-                               CMS_R_ERROR_GETTING_PUBLIC_KEY);
-               goto err;
-               }
-       CRYPTO_add(&recip->references, 1, CRYPTO_LOCK_X509);
-       CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
-       ktri->pkey = pk;
-       ktri->recip = recip;
-
-       if (flags & CMS_USE_KEYID)
-               {
-               ktri->version = 2;
-               type = CMS_RECIPINFO_KEYIDENTIFIER;
-               }
-       else
-               {
-               ktri->version = 0;
-               type = CMS_RECIPINFO_ISSUER_SERIAL;
-               }
-
-       /* Not a typo: RecipientIdentifier and SignerIdentifier are the
-        * same structure.
-        */
-
-       if (!cms_set1_SignerIdentifier(ktri->rid, recip, type))
-               goto err;
-
-       if (pk->ameth && pk->ameth->pkey_ctrl)
-               {
-               i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_ENVELOPE,
-                                               0, ri);
-               if (i == -2)
-                       {
-                       CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
-                               CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
-                       goto err;
-                       }
-               if (i <= 0)
-                       {
-                       CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
-                               CMS_R_CTRL_FAILURE);
-                       goto err;
-                       }
-               }
-
-       if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
-               goto merr;
-
-       return ri;
-
-       merr:
-       CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, ERR_R_MALLOC_FAILURE);
-       err:
-       if (ri)
-               M_ASN1_free_of(ri, CMS_RecipientInfo);
-       return NULL;
-
-       }
-#endif
+                                           X509 *recip, unsigned int flags)
+{
+    CMS_RecipientInfo *ri = NULL;
+    CMS_EnvelopedData *env;
+    EVP_PKEY *pk = NULL;
+    env = cms_get0_enveloped(cms);
+    if (!env)
+        goto err;
+
+    /* Initialize recipient info */
+    ri = M_ASN1_new_of(CMS_RecipientInfo);
+    if (!ri)
+        goto merr;
+
+    pk = X509_get0_pubkey(recip);
+    if (!pk) {
+        CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, CMS_R_ERROR_GETTING_PUBLIC_KEY);
+        goto err;
+    }
+
+    switch (cms_pkey_get_ri_type(pk)) {
+
+    case CMS_RECIPINFO_TRANS:
+        if (!cms_RecipientInfo_ktri_init(ri, recip, pk, flags))
+            goto err;
+        break;
+
+    case CMS_RECIPINFO_AGREE:
+        if (!cms_RecipientInfo_kari_init(ri, recip, pk, flags))
+            goto err;
+        break;
+
+    default:
+        CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
+               CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
+        goto err;
+
+    }
+
+    if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
+        goto merr;
+
+    return ri;
+
+ merr:
+    CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, ERR_R_MALLOC_FAILURE);
+ err:
+    M_ASN1_free_of(ri, CMS_RecipientInfo);
+    return NULL;
+
+}
 
 int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri,
-                                       EVP_PKEY **pk, X509 **recip,
-                                       X509_ALGOR **palg)
-       {
-       CMS_KeyTransRecipientInfo *ktri;
-       if (ri->type != CMS_RECIPINFO_TRANS)
-               {
-               CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_ALGS,
-                       CMS_R_NOT_KEY_TRANSPORT);
-               return 0;
-               }
-
-       ktri = ri->d.ktri;
-
-       if (pk)
-               *pk = ktri->pkey;
-       if (recip)
-               *recip = ktri->recip;
-       if (palg)
-               *palg = ktri->keyEncryptionAlgorithm;
-       return 1;
-       }
+                                     EVP_PKEY **pk, X509 **recip,
+                                     X509_ALGOR **palg)
+{
+    CMS_KeyTransRecipientInfo *ktri;
+    if (ri->type != CMS_RECIPINFO_TRANS) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_ALGS,
+               CMS_R_NOT_KEY_TRANSPORT);
+        return 0;
+    }
+
+    ktri = ri->d.ktri;
+
+    if (pk)
+        *pk = ktri->pkey;
+    if (recip)
+        *recip = ktri->recip;
+    if (palg)
+        *palg = ktri->keyEncryptionAlgorithm;
+    return 1;
+}
 
 int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri,
-                                       ASN1_OCTET_STRING **keyid,
-                                       X509_NAME **issuer, ASN1_INTEGER **sno)
-       {
-       CMS_KeyTransRecipientInfo *ktri;
-       if (ri->type != CMS_RECIPINFO_TRANS)
-               {
-               CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_SIGNER_ID,
-                       CMS_R_NOT_KEY_TRANSPORT);
-               return 0;
-               }
-       ktri = ri->d.ktri;
-
-       return cms_SignerIdentifier_get0_signer_id(ktri->rid,
-                                                       keyid, issuer, sno);
-       }
+                                          ASN1_OCTET_STRING **keyid,
+                                          X509_NAME **issuer,
+                                          ASN1_INTEGER **sno)
+{
+    CMS_KeyTransRecipientInfo *ktri;
+    if (ri->type != CMS_RECIPINFO_TRANS) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_SIGNER_ID,
+               CMS_R_NOT_KEY_TRANSPORT);
+        return 0;
+    }
+    ktri = ri->d.ktri;
+
+    return cms_SignerIdentifier_get0_signer_id(ktri->rid, keyid, issuer, sno);
+}
 
 int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert)
-       {
-       if (ri->type != CMS_RECIPINFO_TRANS)
-               {
-               CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP,
-                       CMS_R_NOT_KEY_TRANSPORT);
-               return -2;
-               }
-
-       return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert);
-       }
-
-int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
-                              EVP_PKEY *pkey)
-       {
-       CMS_KeyTransRecipientInfo *ktri;
-       EVP_PKEY_CTX *pctx = NULL;
-       unsigned char *ek = NULL;
-       size_t eklen;
-
-       int ret = 0;
-
-       if (ri->type != CMS_RECIPINFO_TRANS)
-               {
-               CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT,
-                       CMS_R_NOT_KEY_TRANSPORT);
-               return 0;
-               }
-       ktri = ri->d.ktri;
-
-       pctx = EVP_PKEY_CTX_new(pkey, NULL);
-       if (!pctx)
-               return 0;
-
-       if (EVP_PKEY_decrypt_init(pctx) <= 0)
-               goto err;
-
-       if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
-                               EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0)
-               {
-               CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT, CMS_R_CTRL_ERROR);
-               goto err;
-               }
-
-       if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
-                               ktri->encryptedKey->data,
-                               ktri->encryptedKey->length) <= 0)
-               goto err;
-
-       ek = OPENSSL_malloc(eklen);
-
-       if (ek == NULL)
-               {
-               CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT, ERR_R_MALLOC_FAILURE);
-               goto err;
-               }
-
-       if (EVP_PKEY_decrypt(pctx, ek, &eklen,
-                               ktri->encryptedKey->data,
-                               ktri->encryptedKey->length) <= 0)
-               {
-               CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT, CMS_R_CMS_LIB);
-               goto err;
-               }
-
-       ret = 1;
-
-       cms->d.envelopedData->encryptedContentInfo->key = ek;
-       cms->d.envelopedData->encryptedContentInfo->keylen = eklen;
-
-       err:
-       if (pctx)
-               EVP_PKEY_CTX_free(pctx);
-       if (!ret && ek)
-               OPENSSL_free(ek);
-
-       return ret;
-       }
+{
+    if (ri->type != CMS_RECIPINFO_TRANS) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP,
+               CMS_R_NOT_KEY_TRANSPORT);
+        return -2;
+    }
+    return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert);
+}
+
+int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey)
+{
+    if (ri->type != CMS_RECIPINFO_TRANS) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PKEY, CMS_R_NOT_KEY_TRANSPORT);
+        return 0;
+    }
+    ri->d.ktri->pkey = pkey;
+    return 1;
+}
+
+/* Encrypt content key in key transport recipient info */
+
+static int cms_RecipientInfo_ktri_encrypt(CMS_ContentInfo *cms,
+                                          CMS_RecipientInfo *ri)
+{
+    CMS_KeyTransRecipientInfo *ktri;
+    CMS_EncryptedContentInfo *ec;
+    EVP_PKEY_CTX *pctx;
+    unsigned char *ek = NULL;
+    size_t eklen;
+
+    int ret = 0;
+
+    if (ri->type != CMS_RECIPINFO_TRANS) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_NOT_KEY_TRANSPORT);
+        return 0;
+    }
+    ktri = ri->d.ktri;
+    ec = cms->d.envelopedData->encryptedContentInfo;
+
+    pctx = ktri->pctx;
+
+    if (pctx) {
+        if (!cms_env_asn1_ctrl(ri, 0))
+            goto err;
+    } else {
+        pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
+        if (pctx == NULL)
+            return 0;
+
+        if (EVP_PKEY_encrypt_init(pctx) <= 0)
+            goto err;
+    }
+
+    if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
+                          EVP_PKEY_CTRL_CMS_ENCRYPT, 0, ri) <= 0) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_CTRL_ERROR);
+        goto err;
+    }
+
+    if (EVP_PKEY_encrypt(pctx, NULL, &eklen, ec->key, ec->keylen) <= 0)
+        goto err;
+
+    ek = OPENSSL_malloc(eklen);
+
+    if (ek == NULL) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    if (EVP_PKEY_encrypt(pctx, ek, &eklen, ec->key, ec->keylen) <= 0)
+        goto err;
+
+    ASN1_STRING_set0(ktri->encryptedKey, ek, eklen);
+    ek = NULL;
+
+    ret = 1;
+
+ err:
+    EVP_PKEY_CTX_free(pctx);
+    ktri->pctx = NULL;
+    OPENSSL_free(ek);
+    return ret;
+
+}
+
+/* Decrypt content key from KTRI */
+
+static int cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo *cms,
+                                          CMS_RecipientInfo *ri)
+{
+    CMS_KeyTransRecipientInfo *ktri = ri->d.ktri;
+    EVP_PKEY *pkey = ktri->pkey;
+    unsigned char *ek = NULL;
+    size_t eklen;
+    int ret = 0;
+    CMS_EncryptedContentInfo *ec;
+    ec = cms->d.envelopedData->encryptedContentInfo;
+
+    if (ktri->pkey == NULL) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_NO_PRIVATE_KEY);
+        return 0;
+    }
+
+    ktri->pctx = EVP_PKEY_CTX_new(pkey, NULL);
+    if (ktri->pctx == NULL)
+        return 0;
+
+    if (EVP_PKEY_decrypt_init(ktri->pctx) <= 0)
+        goto err;
+
+    if (!cms_env_asn1_ctrl(ri, 1))
+        goto err;
+
+    if (EVP_PKEY_CTX_ctrl(ktri->pctx, -1, EVP_PKEY_OP_DECRYPT,
+                          EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CTRL_ERROR);
+        goto err;
+    }
+
+    if (EVP_PKEY_decrypt(ktri->pctx, NULL, &eklen,
+                         ktri->encryptedKey->data,
+                         ktri->encryptedKey->length) <= 0)
+        goto err;
+
+    ek = OPENSSL_malloc(eklen);
+
+    if (ek == NULL) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    if (EVP_PKEY_decrypt(ktri->pctx, ek, &eklen,
+                         ktri->encryptedKey->data,
+                         ktri->encryptedKey->length) <= 0) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CMS_LIB);
+        goto err;
+    }
+
+    ret = 1;
+
+    OPENSSL_clear_free(ec->key, ec->keylen);
+    ec->key = ek;
+    ec->keylen = eklen;
+
+ err:
+    EVP_PKEY_CTX_free(ktri->pctx);
+    ktri->pctx = NULL;
+    if (!ret)
+        OPENSSL_free(ek);
+
+    return ret;
+}
+
+/* Key Encrypted Key (KEK) RecipientInfo routines */
+
+int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri,
+                                   const unsigned char *id, size_t idlen)
+{
+    ASN1_OCTET_STRING tmp_os;
+    CMS_KEKRecipientInfo *kekri;
+    if (ri->type != CMS_RECIPINFO_KEK) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ID_CMP, CMS_R_NOT_KEK);
+        return -2;
+    }
+    kekri = ri->d.kekri;
+    tmp_os.type = V_ASN1_OCTET_STRING;
+    tmp_os.flags = 0;
+    tmp_os.data = (unsigned char *)id;
+    tmp_os.length = (int)idlen;
+    return ASN1_OCTET_STRING_cmp(&tmp_os, kekri->kekid->keyIdentifier);
+}
+
+/* For now hard code AES key wrap info */
+
+static size_t aes_wrap_keylen(int nid)
+{
+    switch (nid) {
+    case NID_id_aes128_wrap:
+        return 16;
+
+    case NID_id_aes192_wrap:
+        return 24;
+
+    case NID_id_aes256_wrap:
+        return 32;
+
+    default:
+        return 0;
+    }
+}
+
+CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid,
+                                          unsigned char *key, size_t keylen,
+                                          unsigned char *id, size_t idlen,
+                                          ASN1_GENERALIZEDTIME *date,
+                                          ASN1_OBJECT *otherTypeId,
+                                          ASN1_TYPE *otherType)
+{
+    CMS_RecipientInfo *ri = NULL;
+    CMS_EnvelopedData *env;
+    CMS_KEKRecipientInfo *kekri;
+    env = cms_get0_enveloped(cms);
+    if (!env)
+        goto err;
+
+    if (nid == NID_undef) {
+        switch (keylen) {
+        case 16:
+            nid = NID_id_aes128_wrap;
+            break;
+
+        case 24:
+            nid = NID_id_aes192_wrap;
+            break;
+
+        case 32:
+            nid = NID_id_aes256_wrap;
+            break;
+
+        default:
+            CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
+            goto err;
+        }
+
+    } else {
+
+        size_t exp_keylen = aes_wrap_keylen(nid);
+
+        if (!exp_keylen) {
+            CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY,
+                   CMS_R_UNSUPPORTED_KEK_ALGORITHM);
+            goto err;
+        }
+
+        if (keylen != exp_keylen) {
+            CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
+            goto err;
+        }
+
+    }
+
+    /* Initialize recipient info */
+    ri = M_ASN1_new_of(CMS_RecipientInfo);
+    if (!ri)
+        goto merr;
+
+    ri->d.kekri = M_ASN1_new_of(CMS_KEKRecipientInfo);
+    if (!ri->d.kekri)
+        goto merr;
+    ri->type = CMS_RECIPINFO_KEK;
+
+    kekri = ri->d.kekri;
+
+    if (otherTypeId) {
+        kekri->kekid->other = M_ASN1_new_of(CMS_OtherKeyAttribute);
+        if (kekri->kekid->other == NULL)
+            goto merr;
+    }
+
+    if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
+        goto merr;
+
+    /* After this point no calls can fail */
+
+    kekri->version = 4;
+
+    kekri->key = key;
+    kekri->keylen = keylen;
+
+    ASN1_STRING_set0(kekri->kekid->keyIdentifier, id, idlen);
+
+    kekri->kekid->date = date;
+
+    if (kekri->kekid->other) {
+        kekri->kekid->other->keyAttrId = otherTypeId;
+        kekri->kekid->other->keyAttr = otherType;
+    }
+
+    X509_ALGOR_set0(kekri->keyEncryptionAlgorithm,
+                    OBJ_nid2obj(nid), V_ASN1_UNDEF, NULL);
+
+    return ri;
+
+ merr:
+    CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, ERR_R_MALLOC_FAILURE);
+ err:
+    M_ASN1_free_of(ri, CMS_RecipientInfo);
+    return NULL;
+
+}
+
+int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri,
+                                    X509_ALGOR **palg,
+                                    ASN1_OCTET_STRING **pid,
+                                    ASN1_GENERALIZEDTIME **pdate,
+                                    ASN1_OBJECT **potherid,
+                                    ASN1_TYPE **pothertype)
+{
+    CMS_KEKIdentifier *rkid;
+    if (ri->type != CMS_RECIPINFO_KEK) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_GET0_ID, CMS_R_NOT_KEK);
+        return 0;
+    }
+    rkid = ri->d.kekri->kekid;
+    if (palg)
+        *palg = ri->d.kekri->keyEncryptionAlgorithm;
+    if (pid)
+        *pid = rkid->keyIdentifier;
+    if (pdate)
+        *pdate = rkid->date;
+    if (potherid) {
+        if (rkid->other)
+            *potherid = rkid->other->keyAttrId;
+        else
+            *potherid = NULL;
+    }
+    if (pothertype) {
+        if (rkid->other)
+            *pothertype = rkid->other->keyAttr;
+        else
+            *pothertype = NULL;
+    }
+    return 1;
+}
+
+int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri,
+                               unsigned char *key, size_t keylen)
+{
+    CMS_KEKRecipientInfo *kekri;
+    if (ri->type != CMS_RECIPINFO_KEK) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_KEY, CMS_R_NOT_KEK);
+        return 0;
+    }
+
+    kekri = ri->d.kekri;
+    kekri->key = key;
+    kekri->keylen = keylen;
+    return 1;
+}
+
+/* Encrypt content key in KEK recipient info */
+
+static int cms_RecipientInfo_kekri_encrypt(CMS_ContentInfo *cms,
+                                           CMS_RecipientInfo *ri)
+{
+    CMS_EncryptedContentInfo *ec;
+    CMS_KEKRecipientInfo *kekri;
+    AES_KEY actx;
+    unsigned char *wkey = NULL;
+    int wkeylen;
+    int r = 0;
+
+    ec = cms->d.envelopedData->encryptedContentInfo;
+
+    kekri = ri->d.kekri;
+
+    if (!kekri->key) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_NO_KEY);
+        return 0;
+    }
+
+    if (AES_set_encrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT,
+               CMS_R_ERROR_SETTING_KEY);
+        goto err;
+    }
+
+    wkey = OPENSSL_malloc(ec->keylen + 8);
+
+    if (wkey == NULL) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    wkeylen = AES_wrap_key(&actx, NULL, wkey, ec->key, ec->keylen);
+
+    if (wkeylen <= 0) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_WRAP_ERROR);
+        goto err;
+    }
+
+    ASN1_STRING_set0(kekri->encryptedKey, wkey, wkeylen);
+
+    r = 1;
+
+ err:
+
+    if (!r)
+        OPENSSL_free(wkey);
+    OPENSSL_cleanse(&actx, sizeof(actx));
+
+    return r;
+
+}
+
+/* Decrypt content key in KEK recipient info */
+
+static int cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo *cms,
+                                           CMS_RecipientInfo *ri)
+{
+    CMS_EncryptedContentInfo *ec;
+    CMS_KEKRecipientInfo *kekri;
+    AES_KEY actx;
+    unsigned char *ukey = NULL;
+    int ukeylen;
+    int r = 0, wrap_nid;
+
+    ec = cms->d.envelopedData->encryptedContentInfo;
+
+    kekri = ri->d.kekri;
+
+    if (!kekri->key) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_NO_KEY);
+        return 0;
+    }
+
+    wrap_nid = OBJ_obj2nid(kekri->keyEncryptionAlgorithm->algorithm);
+    if (aes_wrap_keylen(wrap_nid) != kekri->keylen) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
+               CMS_R_INVALID_KEY_LENGTH);
+        return 0;
+    }
+
+    /* If encrypted key length is invalid don't bother */
+
+    if (kekri->encryptedKey->length < 16) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
+               CMS_R_INVALID_ENCRYPTED_KEY_LENGTH);
+        goto err;
+    }
+
+    if (AES_set_decrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
+               CMS_R_ERROR_SETTING_KEY);
+        goto err;
+    }
+
+    ukey = OPENSSL_malloc(kekri->encryptedKey->length - 8);
+
+    if (ukey == NULL) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    ukeylen = AES_unwrap_key(&actx, NULL, ukey,
+                             kekri->encryptedKey->data,
+                             kekri->encryptedKey->length);
+
+    if (ukeylen <= 0) {
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_UNWRAP_ERROR);
+        goto err;
+    }
+
+    ec->key = ukey;
+    ec->keylen = ukeylen;
+
+    r = 1;
+
+ err:
+
+    if (!r)
+        OPENSSL_free(ukey);
+    OPENSSL_cleanse(&actx, sizeof(actx));
+
+    return r;
+
+}
+
+int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
+{
+    switch (ri->type) {
+    case CMS_RECIPINFO_TRANS:
+        return cms_RecipientInfo_ktri_decrypt(cms, ri);
+
+    case CMS_RECIPINFO_KEK:
+        return cms_RecipientInfo_kekri_decrypt(cms, ri);
+
+    case CMS_RECIPINFO_PASS:
+        return cms_RecipientInfo_pwri_crypt(cms, ri, 0);
+
+    default:
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT,
+               CMS_R_UNSUPPORTED_RECPIENTINFO_TYPE);
+        return 0;
+    }
+}
+
+int CMS_RecipientInfo_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
+{
+    switch (ri->type) {
+    case CMS_RECIPINFO_TRANS:
+        return cms_RecipientInfo_ktri_encrypt(cms, ri);
+
+    case CMS_RECIPINFO_AGREE:
+        return cms_RecipientInfo_kari_encrypt(cms, ri);
+
+    case CMS_RECIPINFO_KEK:
+        return cms_RecipientInfo_kekri_encrypt(cms, ri);
+
+    case CMS_RECIPINFO_PASS:
+        return cms_RecipientInfo_pwri_crypt(cms, ri, 1);
+
+    default:
+        CMSerr(CMS_F_CMS_RECIPIENTINFO_ENCRYPT,
+               CMS_R_UNSUPPORTED_RECIPIENT_TYPE);
+        return 0;
+    }
+}
+
+/* Check structures and fixup version numbers (if necessary) */
+
+static void cms_env_set_originfo_version(CMS_EnvelopedData *env)
+{
+    CMS_OriginatorInfo *org = env->originatorInfo;
+    int i;
+    if (org == NULL)
+        return;
+    for (i = 0; i < sk_CMS_CertificateChoices_num(org->certificates); i++) {
+        CMS_CertificateChoices *cch;
+        cch = sk_CMS_CertificateChoices_value(org->certificates, i);
+        if (cch->type == CMS_CERTCHOICE_OTHER) {
+            env->version = 4;
+            return;
+        } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
+            if (env->version < 3)
+                env->version = 3;
+        }
+    }
+
+    for (i = 0; i < sk_CMS_RevocationInfoChoice_num(org->crls); i++) {
+        CMS_RevocationInfoChoice *rch;
+        rch = sk_CMS_RevocationInfoChoice_value(org->crls, i);
+        if (rch->type == CMS_REVCHOICE_OTHER) {
+            env->version = 4;
+            return;
+        }
+    }
+}
+
+static void cms_env_set_version(CMS_EnvelopedData *env)
+{
+    int i;
+    CMS_RecipientInfo *ri;
+
+    /*
+     * Can't set version higher than 4 so if 4 or more already nothing to do.
+     */
+    if (env->version >= 4)
+        return;
+
+    cms_env_set_originfo_version(env);
+
+    if (env->version >= 3)
+        return;
+
+    for (i = 0; i < sk_CMS_RecipientInfo_num(env->recipientInfos); i++) {
+        ri = sk_CMS_RecipientInfo_value(env->recipientInfos, i);
+        if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER) {
+            env->version = 3;
+            return;
+        } else if (ri->type != CMS_RECIPINFO_TRANS
+                   || ri->d.ktri->version != 0) {
+            env->version = 2;
+        }
+    }
+    if (env->version == 2)
+        return;
+    if (env->originatorInfo || env->unprotectedAttrs)
+        env->version = 2;
+    env->version = 0;
+}
 
 BIO *cms_EnvelopedData_init_bio(CMS_ContentInfo *cms)
-       {
-       CMS_EncryptedContentInfo *ec;
-       ec = cms->d.envelopedData->encryptedContentInfo;
-       return cms_EncryptedContent_init_bio(ec);
-       }
+{
+    CMS_EncryptedContentInfo *ec;
+    STACK_OF(CMS_RecipientInfo) *rinfos;
+    CMS_RecipientInfo *ri;
+    int i, ok = 0;
+    BIO *ret;
+
+    /* Get BIO first to set up key */
+
+    ec = cms->d.envelopedData->encryptedContentInfo;
+    ret = cms_EncryptedContent_init_bio(ec);
+
+    /* If error or no cipher end of processing */
+
+    if (!ret || !ec->cipher)
+        return ret;
+
+    /* Now encrypt content key according to each RecipientInfo type */
+
+    rinfos = cms->d.envelopedData->recipientInfos;
+
+    for (i = 0; i < sk_CMS_RecipientInfo_num(rinfos); i++) {
+        ri = sk_CMS_RecipientInfo_value(rinfos, i);
+        if (CMS_RecipientInfo_encrypt(cms, ri) <= 0) {
+            CMSerr(CMS_F_CMS_ENVELOPEDDATA_INIT_BIO,
+                   CMS_R_ERROR_SETTING_RECIPIENTINFO);
+            goto err;
+        }
+    }
+    cms_env_set_version(cms->d.envelopedData);
+
+    ok = 1;
+
+ err:
+    ec->cipher = NULL;
+    OPENSSL_clear_free(ec->key, ec->keylen);
+    ec->key = NULL;
+    ec->keylen = 0;
+    if (ok)
+        return ret;
+    BIO_free(ret);
+    return NULL;
+
+}
+
+/*
+ * Get RecipientInfo type (if any) supported by a key (public or private). To
+ * retain compatibility with previous behaviour if the ctrl value isn't
+ * supported we assume key transport.
+ */
+int cms_pkey_get_ri_type(EVP_PKEY *pk)
+{
+    if (pk->ameth && pk->ameth->pkey_ctrl) {
+        int i, r;
+        i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_RI_TYPE, 0, &r);
+        if (i > 0)
+            return r;
+    }
+    return CMS_RECIPINFO_TRANS;
+}