1 files changed, 454 insertions, 0 deletions

diff --git a/src/lib/libcrypto/cms/cms_pwri.c b/src/lib/libcrypto/cms/cms_pwri.c
new file mode 100644
index 0000000000..b79612a12d
--- /dev/null
+++ b/src/lib/libcrypto/cms/cms_pwri.c
@@ -0,0 +1,454 @@
+/* crypto/cms/cms_pwri.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project.
+ */
+/* ====================================================================
+ * Copyright (c) 2009 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 <openssl/aes.h>
+#include "cms_lcl.h"
+#include "asn1_locl.h"
+
+int CMS_RecipientInfo_set0_password(CMS_RecipientInfo *ri, 
+                                unsigned char *pass, ossl_ssize_t passlen)
+        {
+        CMS_PasswordRecipientInfo *pwri;
+        if (ri->type != CMS_RECIPINFO_PASS)
+                {
+                CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PASSWORD, CMS_R_NOT_PWRI);
+                return 0;
+                }
+
+        pwri = ri->d.pwri;
+        pwri->pass = pass;
+        if (pass && passlen < 0)
+                passlen = strlen((char *)pass);
+        pwri->passlen = passlen;
+        return 1;
+        }
+
+CMS_RecipientInfo *CMS_add0_recipient_password(CMS_ContentInfo *cms,
+                                        int iter, int wrap_nid, int pbe_nid,
+                                        unsigned char *pass,
+                                        ossl_ssize_t passlen,
+                                        const EVP_CIPHER *kekciph)
+        {
+        CMS_RecipientInfo *ri = NULL;
+        CMS_EnvelopedData *env;
+        CMS_PasswordRecipientInfo *pwri;
+        EVP_CIPHER_CTX ctx;
+        X509_ALGOR *encalg = NULL;
+        unsigned char iv[EVP_MAX_IV_LENGTH];
+        int ivlen;
+        env = cms_get0_enveloped(cms);
+        if (!env)
+                goto err;
+
+        if (wrap_nid <= 0)
+                wrap_nid = NID_id_alg_PWRI_KEK;
+
+        if (pbe_nid <= 0)
+                pbe_nid = NID_id_pbkdf2;
+
+        /* Get from enveloped data */
+        if (kekciph == NULL)
+                kekciph = env->encryptedContentInfo->cipher;
+
+        if (kekciph == NULL)
+                {
+                CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD, CMS_R_NO_CIPHER);
+                return NULL;
+                }
+        if (wrap_nid != NID_id_alg_PWRI_KEK)
+                {
+                CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD,
+                                CMS_R_UNSUPPORTED_KEY_ENCRYPTION_ALGORITHM);
+                return NULL;
+                }
+
+        /* Setup algorithm identifier for cipher */
+        encalg = X509_ALGOR_new();
+        EVP_CIPHER_CTX_init(&ctx);
+
+        if (EVP_EncryptInit_ex(&ctx, kekciph, NULL, NULL, NULL) <= 0)
+                {
+                CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD, ERR_R_EVP_LIB);
+                goto err;
+                }
+
+        ivlen = EVP_CIPHER_CTX_iv_length(&ctx);
+
+        if (ivlen > 0)
+                {
+                if (RAND_pseudo_bytes(iv, ivlen) <= 0)
+                        goto err;
+                if (EVP_EncryptInit_ex(&ctx, NULL, NULL, NULL, iv) <= 0)
+                        {
+                        CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD,
+                                                        ERR_R_EVP_LIB);
+                        goto err;
+                        }
+                encalg->parameter = ASN1_TYPE_new();
+                if (!encalg->parameter)
+                        {
+                        CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD,
+                                                        ERR_R_MALLOC_FAILURE);
+                        goto err;
+                        }
+                if (EVP_CIPHER_param_to_asn1(&ctx, encalg->parameter) <= 0)
+                        {
+                        CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD,
+                                CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
+                        goto err;
+                        }
+                }
+
+
+        encalg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(&ctx));
+
+        EVP_CIPHER_CTX_cleanup(&ctx);
+
+        /* Initialize recipient info */
+        ri = M_ASN1_new_of(CMS_RecipientInfo);
+        if (!ri)
+                goto merr;
+
+        ri->d.pwri = M_ASN1_new_of(CMS_PasswordRecipientInfo);
+        if (!ri->d.pwri)
+                goto merr;
+        ri->type = CMS_RECIPINFO_PASS;
+
+        pwri = ri->d.pwri;
+        /* Since this is overwritten, free up empty structure already there */
+        X509_ALGOR_free(pwri->keyEncryptionAlgorithm);
+        pwri->keyEncryptionAlgorithm = X509_ALGOR_new();
+        if (!pwri->keyEncryptionAlgorithm)
+                goto merr;
+        pwri->keyEncryptionAlgorithm->algorithm = OBJ_nid2obj(wrap_nid);
+        pwri->keyEncryptionAlgorithm->parameter = ASN1_TYPE_new();
+        if (!pwri->keyEncryptionAlgorithm->parameter)
+                goto merr;
+
+        if(!ASN1_item_pack(encalg, ASN1_ITEM_rptr(X509_ALGOR),
+            &pwri->keyEncryptionAlgorithm->parameter->value.sequence))
+                goto merr;
+        pwri->keyEncryptionAlgorithm->parameter->type = V_ASN1_SEQUENCE;
+
+        X509_ALGOR_free(encalg);
+        encalg = NULL;
+
+        /* Setup PBE algorithm */
+
+        pwri->keyDerivationAlgorithm = PKCS5_pbkdf2_set(iter, NULL, 0, -1, -1);
+
+        if (!pwri->keyDerivationAlgorithm)
+                goto err;
+
+        CMS_RecipientInfo_set0_password(ri, pass, passlen);
+        pwri->version = 0;
+
+        if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
+                goto merr;
+
+        return ri;
+
+        merr:
+        CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD, ERR_R_MALLOC_FAILURE);
+        err:
+        EVP_CIPHER_CTX_cleanup(&ctx);
+        if (ri)
+                M_ASN1_free_of(ri, CMS_RecipientInfo);
+        if (encalg)
+                X509_ALGOR_free(encalg);
+        return NULL;
+
+        }
+
+/* This is an implementation of the key wrapping mechanism in RFC3211,
+ * at some point this should go into EVP.
+ */
+
+static int kek_unwrap_key(unsigned char *out, size_t *outlen,
+                const unsigned char *in, size_t inlen, EVP_CIPHER_CTX *ctx)
+        {
+        size_t blocklen = EVP_CIPHER_CTX_block_size(ctx);
+        unsigned char *tmp;
+        int outl, rv = 0;
+        if (inlen < 2 * blocklen)
+                {
+                /* too small */
+                return 0;
+                }
+        if (inlen % blocklen)
+                {
+                /* Invalid size */
+                return 0;
+                }
+        tmp = OPENSSL_malloc(inlen);
+        /* setup IV by decrypting last two blocks */
+        EVP_DecryptUpdate(ctx, tmp + inlen - 2 * blocklen, &outl,
+                                in  + inlen - 2 * blocklen, blocklen * 2);
+        /* Do a decrypt of last decrypted block to set IV to correct value
+         * output it to start of buffer so we don't corrupt decrypted block
+         * this works because buffer is at least two block lengths long.
+         */
+        EVP_DecryptUpdate(ctx, tmp, &outl,
+                                tmp  + inlen - blocklen, blocklen);
+        /* Can now decrypt first n - 1 blocks */
+        EVP_DecryptUpdate(ctx, tmp, &outl, in, inlen - blocklen);
+
+        /* Reset IV to original value */
+        EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL);
+        /* Decrypt again */
+        EVP_DecryptUpdate(ctx, tmp, &outl, tmp, inlen);
+        /* Check check bytes */
+        if (((tmp[1] ^ tmp[4]) & (tmp[2] ^ tmp[5]) & (tmp[3] ^ tmp[6])) != 0xff)
+                {
+                /* Check byte failure */
+                goto err;
+                }
+        if (inlen < (size_t)(tmp[0] - 4 ))
+                {
+                /* Invalid length value */
+                goto err;
+                }
+        *outlen = (size_t)tmp[0];
+        memcpy(out, tmp + 4, *outlen);
+        rv = 1;
+        err:
+        OPENSSL_cleanse(tmp, inlen);
+        OPENSSL_free(tmp);
+        return rv;
+
+        }
+
+static int kek_wrap_key(unsigned char *out, size_t *outlen,
+                const unsigned char *in, size_t inlen, EVP_CIPHER_CTX *ctx)
+        {
+        size_t blocklen = EVP_CIPHER_CTX_block_size(ctx);
+        size_t olen;
+        int dummy;
+        /* First decide length of output buffer: need header and round up to
+         * multiple of block length.
+         */
+        olen = (inlen + 4 + blocklen - 1)/blocklen;
+        olen *= blocklen;
+        if (olen < 2 * blocklen)
+                {
+                /* Key too small */
+                return 0;
+                }
+        if (inlen > 0xFF)
+                {
+                /* Key too large */
+                return 0;
+                }
+        if (out)
+                {
+                /* Set header */
+                out[0] = (unsigned char)inlen;
+                out[1] = in[0] ^ 0xFF;
+                out[2] = in[1] ^ 0xFF;
+                out[3] = in[2] ^ 0xFF;
+                memcpy(out + 4, in, inlen);
+                /* Add random padding to end */
+                if (olen > inlen + 4)
+                        RAND_pseudo_bytes(out + 4 + inlen, olen - 4 - inlen);
+                /* Encrypt twice */
+                EVP_EncryptUpdate(ctx, out, &dummy, out, olen);
+                EVP_EncryptUpdate(ctx, out, &dummy, out, olen);
+                }
+
+        *outlen = olen;
+
+        return 1;
+        }
+
+/* Encrypt/Decrypt content key in PWRI recipient info */
+
+int cms_RecipientInfo_pwri_crypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
+                                                        int en_de)
+        {
+        CMS_EncryptedContentInfo *ec;
+        CMS_PasswordRecipientInfo *pwri;
+        const unsigned char *p = NULL;
+        int plen;
+        int r = 0;
+        X509_ALGOR *algtmp, *kekalg = NULL;
+        EVP_CIPHER_CTX kekctx;
+        const EVP_CIPHER *kekcipher;
+        unsigned char *key = NULL;
+        size_t keylen;
+
+        ec = cms->d.envelopedData->encryptedContentInfo;
+
+        pwri = ri->d.pwri;
+        EVP_CIPHER_CTX_init(&kekctx);
+
+        if (!pwri->pass)
+                {
+                CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT, CMS_R_NO_PASSWORD);
+                return 0;
+                }
+        algtmp = pwri->keyEncryptionAlgorithm;
+
+        if (!algtmp || OBJ_obj2nid(algtmp->algorithm) != NID_id_alg_PWRI_KEK)
+                {
+                CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
+                                CMS_R_UNSUPPORTED_KEY_ENCRYPTION_ALGORITHM);
+                return 0;
+                }
+
+        if (algtmp->parameter->type == V_ASN1_SEQUENCE)
+                {
+                p = algtmp->parameter->value.sequence->data;
+                plen = algtmp->parameter->value.sequence->length;
+                kekalg = d2i_X509_ALGOR(NULL, &p, plen);
+                }
+        if (kekalg == NULL)
+                {
+                CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
+                                CMS_R_INVALID_KEY_ENCRYPTION_PARAMETER);
+                return 0;
+                }
+
+        kekcipher = EVP_get_cipherbyobj(kekalg->algorithm);
+                
+        if(!kekcipher)
+                {
+                CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
+                                CMS_R_UNKNOWN_CIPHER);
+                goto err;
+                }
+
+        /* Fixup cipher based on AlgorithmIdentifier to set IV etc */
+        if (!EVP_CipherInit_ex(&kekctx, kekcipher, NULL, NULL, NULL, en_de))
+                goto err;
+        EVP_CIPHER_CTX_set_padding(&kekctx, 0);
+        if(EVP_CIPHER_asn1_to_param(&kekctx, kekalg->parameter) < 0)
+                {
+                CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
+                                CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
+                goto err;
+                }
+
+        algtmp = pwri->keyDerivationAlgorithm;
+
+        /* Finish password based key derivation to setup key in "ctx" */
+
+        if (EVP_PBE_CipherInit(algtmp->algorithm,
+                                (char *)pwri->pass, pwri->passlen,
+                                algtmp->parameter, &kekctx, en_de) < 0)
+                {
+                CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT, ERR_R_EVP_LIB);
+                goto err;
+                }
+
+        /* Finally wrap/unwrap the key */
+
+        if (en_de)
+                {
+
+                if (!kek_wrap_key(NULL, &keylen, ec->key, ec->keylen, &kekctx))
+                        goto err;
+
+                key = OPENSSL_malloc(keylen);
+
+                if (!key)
+                        goto err;
+
+                if (!kek_wrap_key(key, &keylen, ec->key, ec->keylen, &kekctx))
+                        goto err;
+                pwri->encryptedKey->data = key;
+                pwri->encryptedKey->length = keylen;
+                }
+        else
+                {
+                key = OPENSSL_malloc(pwri->encryptedKey->length);
+
+                if (!key)
+                        {
+                        CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
+                                                        ERR_R_MALLOC_FAILURE);
+                        goto err;
+                        }
+                if (!kek_unwrap_key(key, &keylen,
+                                        pwri->encryptedKey->data,
+                                        pwri->encryptedKey->length, &kekctx))
+                        {
+                        CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
+                                                        CMS_R_UNWRAP_FAILURE);
+                        goto err;
+                        }
+
+                ec->key = key;
+                ec->keylen = keylen;
+
+                }
+
+        r = 1;
+
+        err:
+
+        EVP_CIPHER_CTX_cleanup(&kekctx);
+
+        if (!r && key)
+                OPENSSL_free(key);
+        X509_ALGOR_free(kekalg);
+
+        return r;
+
+        }