diff options
Diffstat (limited to 'src/crypto/pkcs8/p5_pbev2.c')
| -rw-r--r-- | src/crypto/pkcs8/p5_pbev2.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/src/crypto/pkcs8/p5_pbev2.c b/src/crypto/pkcs8/p5_pbev2.c new file mode 100644 index 0000000..9eb9848 --- /dev/null +++ b/src/crypto/pkcs8/p5_pbev2.c @@ -0,0 +1,303 @@ +/* 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 <string.h> + +#include <openssl/asn1t.h> +#include <openssl/cipher.h> +#include <openssl/err.h> +#include <openssl/mem.h> +#include <openssl/pkcs8.h> +#include <openssl/rand.h> +#include <openssl/x509.h> + +#include "internal.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); + +static int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len) + { + ASN1_STRING *os; + + if ((os=M_ASN1_OCTET_STRING_new()) == NULL) return(0); + if (!M_ASN1_OCTET_STRING_set(os,data,len)) + { + M_ASN1_OCTET_STRING_free(os); + return 0; + } + ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os); + return(1); + } + +static int param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type) + { + unsigned iv_len; + + iv_len = EVP_CIPHER_CTX_iv_length(c); + return ASN1_TYPE_set_octetstring(type, c->oiv, iv_len); + } + +/* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm: + * yes I know this is horrible! + * + * Extended version to allow application supplied PRF NID and IV. */ + +X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter, + unsigned char *salt, int saltlen, + unsigned char *aiv, int prf_nid) +{ + X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL; + int alg_nid, keylen; + EVP_CIPHER_CTX ctx; + unsigned char iv[EVP_MAX_IV_LENGTH]; + PBE2PARAM *pbe2 = NULL; + const ASN1_OBJECT *obj; + + alg_nid = EVP_CIPHER_nid(cipher); + if(alg_nid == NID_undef) { + OPENSSL_PUT_ERROR(PKCS8, PKCS5_pbe2_set_iv, PKCS8_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 = (ASN1_OBJECT*) obj; + if(!(scheme->parameter = ASN1_TYPE_new())) goto merr; + + /* Create random IV */ + if (EVP_CIPHER_iv_length(cipher)) + { + if (aiv) + memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher)); + else if (!RAND_bytes(iv, EVP_CIPHER_iv_length(cipher))) + goto err; + } + + EVP_CIPHER_CTX_init(&ctx); + + /* Dummy cipherinit to just setup the IV, and PRF */ + if (!EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0)) + goto err; + if(param_to_asn1(&ctx, scheme->parameter) < 0) { + OPENSSL_PUT_ERROR(PKCS8, PKCS5_pbe2_set_iv, PKCS8_R_ERROR_SETTING_CIPHER_PARAMS); + EVP_CIPHER_CTX_cleanup(&ctx); + goto err; + } + /* If prf NID unspecified see if cipher has a preference. + * An error is OK here: just means use default PRF. + */ + if ((prf_nid == -1) && + EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0) + { + ERR_clear_error(); + prf_nid = NID_hmacWithSHA1; + } + EVP_CIPHER_CTX_cleanup(&ctx); + + /* If its RC2 then we'd better setup the key length */ + + if(alg_nid == NID_rc2_cbc) + keylen = EVP_CIPHER_key_length(cipher); + else + keylen = -1; + + /* Setup keyfunc */ + + X509_ALGOR_free(pbe2->keyfunc); + + pbe2->keyfunc = PKCS5_pbkdf2_set(iter, salt, saltlen, prf_nid, keylen); + + if (!pbe2->keyfunc) + goto merr; + + /* Now set up top level AlgorithmIdentifier */ + + if(!(ret = X509_ALGOR_new())) goto merr; + if(!(ret->parameter = ASN1_TYPE_new())) goto merr; + + ret->algorithm = (ASN1_OBJECT*) OBJ_nid2obj(NID_pbes2); + + /* Encode PBE2PARAM into parameter */ + + if(!ASN1_item_pack(pbe2, ASN1_ITEM_rptr(PBE2PARAM), + &ret->parameter->value.sequence)) goto merr; + ret->parameter->type = V_ASN1_SEQUENCE; + + PBE2PARAM_free(pbe2); + pbe2 = NULL; + + return ret; + + merr: + OPENSSL_PUT_ERROR(PKCS8, PKCS5_pbe2_set_iv, ERR_R_MALLOC_FAILURE); + + err: + PBE2PARAM_free(pbe2); + /* Note 'scheme' is freed as part of pbe2 */ + X509_ALGOR_free(kalg); + X509_ALGOR_free(ret); + + return NULL; + +} + +X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter, + unsigned char *salt, int saltlen) + { + return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1); + } + +X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen, + int prf_nid, int keylen) + { + X509_ALGOR *keyfunc = NULL; + PBKDF2PARAM *kdf = NULL; + ASN1_OCTET_STRING *osalt = NULL; + + if(!(kdf = PBKDF2PARAM_new())) + goto merr; + if(!(osalt = M_ASN1_OCTET_STRING_new())) + goto merr; + + kdf->salt->value.octet_string = osalt; + kdf->salt->type = V_ASN1_OCTET_STRING; + + 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_bytes(osalt->data, saltlen)) + goto merr; + + if(iter <= 0) + iter = PKCS5_DEFAULT_ITERATIONS; + + if(!ASN1_INTEGER_set(kdf->iter, iter)) + goto merr; + + /* If have a key len set it up */ + + if(keylen > 0) + { + if(!(kdf->keylength = M_ASN1_INTEGER_new())) + goto merr; + if(!ASN1_INTEGER_set (kdf->keylength, keylen)) + goto merr; + } + + /* prf can stay NULL if we are using hmacWithSHA1 */ + if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1) + { + kdf->prf = X509_ALGOR_new(); + if (!kdf->prf) + goto merr; + X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid), + V_ASN1_NULL, NULL); + } + + /* Finally setup the keyfunc structure */ + + keyfunc = X509_ALGOR_new(); + if (!keyfunc) + goto merr; + + keyfunc->algorithm = (ASN1_OBJECT*) OBJ_nid2obj(NID_id_pbkdf2); + + /* Encode PBKDF2PARAM into parameter of pbe2 */ + + if(!(keyfunc->parameter = ASN1_TYPE_new())) + goto merr; + + if(!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM), + &keyfunc->parameter->value.sequence)) + goto merr; + keyfunc->parameter->type = V_ASN1_SEQUENCE; + + PBKDF2PARAM_free(kdf); + return keyfunc; + + merr: + OPENSSL_PUT_ERROR(PKCS8, PKCS5_pbkdf2_set, ERR_R_MALLOC_FAILURE); + PBKDF2PARAM_free(kdf); + X509_ALGOR_free(keyfunc); + return NULL; + } + |