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Diffstat (limited to 'openssl/crypto/asn1/p5_pbev2.c')
-rw-r--r--openssl/crypto/asn1/p5_pbev2.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/p5_pbev2.c b/openssl/crypto/asn1/p5_pbev2.c
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+/* p5_pbev2.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 1999-2004.
+ */
+/* ====================================================================
+ * Copyright (c) 1999 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/asn1t.h>
+#include <openssl/x509.h>
+#include <openssl/rand.h>
+
+/* PKCS#5 v2.0 password based encryption structures */
+
+ASN1_SEQUENCE(PBE2PARAM) = {
+ ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
+ ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
+} ASN1_SEQUENCE_END(PBE2PARAM)
+
+IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM)
+
+ASN1_SEQUENCE(PBKDF2PARAM) = {
+ ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
+ ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
+ ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
+ ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
+} ASN1_SEQUENCE_END(PBKDF2PARAM)
+
+IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
+
+/* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm:
+ * yes I know this is horrible!
+ */
+
+X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
+ unsigned char *salt, int saltlen)
+{
+ X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
+ int alg_nid;
+ EVP_CIPHER_CTX ctx;
+ unsigned char iv[EVP_MAX_IV_LENGTH];
+ PBKDF2PARAM *kdf = NULL;
+ PBE2PARAM *pbe2 = NULL;
+ ASN1_OCTET_STRING *osalt = NULL;
+ ASN1_OBJECT *obj;
+
+ alg_nid = EVP_CIPHER_type(cipher);
+ if(alg_nid == NID_undef) {
+ ASN1err(ASN1_F_PKCS5_PBE2_SET,
+ ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
+ goto err;
+ }
+ obj = OBJ_nid2obj(alg_nid);
+
+ if(!(pbe2 = PBE2PARAM_new())) goto merr;
+
+ /* Setup the AlgorithmIdentifier for the encryption scheme */
+ scheme = pbe2->encryption;
+
+ scheme->algorithm = obj;
+ if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;
+
+ /* Create random IV */
+ if (EVP_CIPHER_iv_length(cipher) &&
+ RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0)
+ goto err;
+
+ EVP_CIPHER_CTX_init(&ctx);
+
+ /* Dummy cipherinit to just setup the IV */
+ EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0);
+ if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
+ ASN1err(ASN1_F_PKCS5_PBE2_SET,
+ ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ goto err;
+ }
+ EVP_CIPHER_CTX_cleanup(&ctx);
+
+ if(!(kdf = PBKDF2PARAM_new())) goto merr;
+ if(!(osalt = M_ASN1_OCTET_STRING_new())) goto merr;
+
+ if (!saltlen) saltlen = PKCS5_SALT_LEN;
+ if (!(osalt->data = OPENSSL_malloc (saltlen))) goto merr;
+ osalt->length = saltlen;
+ if (salt) memcpy (osalt->data, salt, saltlen);
+ else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0) goto merr;
+
+ if(iter <= 0) iter = PKCS5_DEFAULT_ITER;
+ if(!ASN1_INTEGER_set(kdf->iter, iter)) goto merr;
+
+ /* Now include salt in kdf structure */
+ kdf->salt->value.octet_string = osalt;
+ kdf->salt->type = V_ASN1_OCTET_STRING;
+ osalt = NULL;
+
+ /* If its RC2 then we'd better setup the key length */
+
+ if(alg_nid == NID_rc2_cbc) {
+ if(!(kdf->keylength = M_ASN1_INTEGER_new())) goto merr;
+ if(!ASN1_INTEGER_set (kdf->keylength,
+ EVP_CIPHER_key_length(cipher))) goto merr;
+ }
+
+ /* prf can stay NULL because we are using hmacWithSHA1 */
+
+ /* Now setup the PBE2PARAM keyfunc structure */
+
+ pbe2->keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
+
+ /* Encode PBKDF2PARAM into parameter of pbe2 */
+
+ if(!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) goto merr;
+
+ if(!ASN1_pack_string_of(PBKDF2PARAM, kdf, i2d_PBKDF2PARAM,
+ &pbe2->keyfunc->parameter->value.sequence)) goto merr;
+ pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE;
+
+ PBKDF2PARAM_free(kdf);
+ kdf = NULL;
+
+ /* Now set up top level AlgorithmIdentifier */
+
+ if(!(ret = X509_ALGOR_new())) goto merr;
+ if(!(ret->parameter = ASN1_TYPE_new())) goto merr;
+
+ ret->algorithm = OBJ_nid2obj(NID_pbes2);
+
+ /* Encode PBE2PARAM into parameter */
+
+ if(!ASN1_pack_string_of(PBE2PARAM, pbe2, i2d_PBE2PARAM,
+ &ret->parameter->value.sequence)) goto merr;
+ ret->parameter->type = V_ASN1_SEQUENCE;
+
+ PBE2PARAM_free(pbe2);
+ pbe2 = NULL;
+
+ return ret;
+
+ merr:
+ ASN1err(ASN1_F_PKCS5_PBE2_SET,ERR_R_MALLOC_FAILURE);
+
+ err:
+ PBE2PARAM_free(pbe2);
+ /* Note 'scheme' is freed as part of pbe2 */
+ M_ASN1_OCTET_STRING_free(osalt);
+ PBKDF2PARAM_free(kdf);
+ X509_ALGOR_free(kalg);
+ X509_ALGOR_free(ret);
+
+ return NULL;
+
+}