1 files changed, 262 insertions, 0 deletions

diff --git a/src/lib/libcrypto/cms/cms_enc.c b/src/lib/libcrypto/cms/cms_enc.c
new file mode 100644
index 0000000000..bab26235bd
--- /dev/null
+++ b/src/lib/libcrypto/cms/cms_enc.c
@@ -0,0 +1,262 @@
+/* crypto/cms/cms_enc.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project.
+ */
+/* ====================================================================
+ * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    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
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT 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.
+ * ====================================================================
+ */
+
+#include "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 "cms_lcl.h"
+
+/* CMS EncryptedData Utilities */
+
+DECLARE_ASN1_ITEM(CMS_EncryptedData)
+
+/* Return BIO based on EncryptedContentInfo and key */
+
+BIO *cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec)
+        {
+        BIO *b;
+        EVP_CIPHER_CTX *ctx;
+        const EVP_CIPHER *ciph;
+        X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
+        unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
+
+        int ok = 0;
+
+        int enc, keep_key = 0;
+
+        enc = ec->cipher ? 1 : 0;
+
+        b = BIO_new(BIO_f_cipher());
+        if (!b)
+                {
+                CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+                                                        ERR_R_MALLOC_FAILURE);
+                return NULL;
+                }
+
+        BIO_get_cipher_ctx(b, &ctx);
+
+        if (enc)
+                {
+                ciph = ec->cipher;
+                /* If not keeping key set cipher to NULL so subsequent calls
+                 * decrypt.
+                 */
+                if (ec->key)
+                        ec->cipher = NULL;
+                }
+        else
+                {
+                ciph = EVP_get_cipherbyobj(calg->algorithm);
+
+                if (!ciph)
+                        {
+                        CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+                                                        CMS_R_UNKNOWN_CIPHER);
+                        goto err;
+                        }
+                }
+
+        if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, enc) <= 0)
+                {
+                CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+                                CMS_R_CIPHER_INITIALISATION_ERROR);
+                goto err;
+                }
+
+        if (enc)
+                {
+                int ivlen;
+                calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
+                /* Generate a random IV if we need one */
+                ivlen = EVP_CIPHER_CTX_iv_length(ctx);
+                if (ivlen > 0)
+                        {
+                        if (RAND_pseudo_bytes(iv, ivlen) <= 0)
+                                goto err;
+                        piv = iv;
+                        }
+                }
+        else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0)
+                {
+                CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+                                CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
+                goto err;
+                }
+
+
+        if (enc && !ec->key)
+                {
+                /* Generate random key */
+                if (!ec->keylen)
+                        ec->keylen = EVP_CIPHER_CTX_key_length(ctx);
+                ec->key = OPENSSL_malloc(ec->keylen);
+                if (!ec->key)
+                        {
+                        CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+                                                        ERR_R_MALLOC_FAILURE);
+                        goto err;
+                        }
+                if (EVP_CIPHER_CTX_rand_key(ctx, ec->key) <= 0)
+                        goto err;
+                keep_key = 1;
+                }
+        else if (ec->keylen != (unsigned int)EVP_CIPHER_CTX_key_length(ctx))
+                {
+                /* If necessary set key length */
+                if (EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen) <= 0)
+                        {
+                        CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+                                CMS_R_INVALID_KEY_LENGTH);
+                        goto err;
+                        }
+                }
+
+        if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0)
+                {
+                CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+                                CMS_R_CIPHER_INITIALISATION_ERROR);
+                goto err;
+                }
+
+        if (piv)
+                {
+                calg->parameter = ASN1_TYPE_new();
+                if (!calg->parameter)
+                        {
+                        CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+                                                        ERR_R_MALLOC_FAILURE);
+                        goto err;
+                        }
+                if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0)
+                        {
+                        CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
+                                CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
+                        goto err;
+                        }
+                }
+        ok = 1;
+
+        err:
+        if (ec->key && !keep_key)
+                {
+                OPENSSL_cleanse(ec->key, ec->keylen);
+                OPENSSL_free(ec->key);
+                ec->key = NULL;
+                }
+        if (ok)
+                return b;
+        BIO_free(b);
+        return NULL;
+        }
+
+int cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec, 
+                                const EVP_CIPHER *cipher,
+                                const unsigned char *key, size_t keylen)
+        {
+        ec->cipher = cipher;
+        if (key)
+                {
+                ec->key = OPENSSL_malloc(keylen);
+                if (!ec->key)
+                        return 0;
+                memcpy(ec->key, key, keylen);
+                }
+        ec->keylen = keylen;
+        if (cipher)
+                ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
+        return 1;
+        }
+
+int CMS_EncryptedData_set1_key(CMS_ContentInfo *cms, const EVP_CIPHER *ciph,
+                                const unsigned char *key, size_t keylen)
+        {
+        CMS_EncryptedContentInfo *ec;
+        if (!key || !keylen)
+                {
+                CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NO_KEY);
+                return 0;
+                }
+        if (ciph)
+                {
+                cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
+                if (!cms->d.encryptedData)
+                        {
+                        CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
+                                ERR_R_MALLOC_FAILURE);
+                        return 0;
+                        }
+                cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
+                cms->d.encryptedData->version = 0;
+                }
+        else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted)
+                {
+                CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
+                                                CMS_R_NOT_ENCRYPTED_DATA);
+                return 0;
+                }
+        ec = cms->d.encryptedData->encryptedContentInfo;
+        return cms_EncryptedContent_init(ec, ciph, key, keylen);
+        }
+
+BIO *cms_EncryptedData_init_bio(CMS_ContentInfo *cms)
+        {
+        CMS_EncryptedData *enc = cms->d.encryptedData;
+        if (enc->encryptedContentInfo->cipher && enc->unprotectedAttrs)
+                enc->version = 2;
+        return cms_EncryptedContent_init_bio(enc->encryptedContentInfo);
+        }