diff options
author | Mathieu Trudel-Lapierre <mathieu.trudel-lapierre@canonical.com> | 2017-09-13 12:09:40 -0700 |
---|---|---|
committer | Mathieu Trudel-Lapierre <mathieu.trudel-lapierre@canonical.com> | 2017-09-13 12:09:40 -0700 |
commit | b6f94dbeacfc6f0a507413096189304c58dbe66c (patch) | |
tree | bce8c7db22209078618294c51d95a0c033aec7d9 /Cryptlib/OpenSSL/crypto/dh/dh_kdf.c | |
parent | 25f7fd1fb389a5f6356f353d16c5ead80dac6bbc (diff) | |
download | efi-boot-shim-upstream/13_git1505328970.9c1c35c5.tar.gz efi-boot-shim-upstream/13_git1505328970.9c1c35c5.zip |
New upstream version 13~git1505328970.9c1c35c5upstream/13_git1505328970.9c1c35c5
Diffstat (limited to 'Cryptlib/OpenSSL/crypto/dh/dh_kdf.c')
-rw-r--r-- | Cryptlib/OpenSSL/crypto/dh/dh_kdf.c | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/Cryptlib/OpenSSL/crypto/dh/dh_kdf.c b/Cryptlib/OpenSSL/crypto/dh/dh_kdf.c deleted file mode 100644 index 2782eeee..00000000 --- a/Cryptlib/OpenSSL/crypto/dh/dh_kdf.c +++ /dev/null @@ -1,150 +0,0 @@ -/* - * Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved. - * - * Licensed under the OpenSSL license (the "License"). You may not use - * this file except in compliance with the License. You can obtain a copy - * in the file LICENSE in the source distribution or at - * https://www.openssl.org/source/license.html - */ - -#include <e_os.h> - -#ifndef OPENSSL_NO_CMS -#include <string.h> -#include <openssl/dh.h> -#include <openssl/evp.h> -#include <openssl/asn1.h> -#include <openssl/cms.h> - - -/* Key derivation from X9.42/RFC2631 */ -/* Uses CMS functions, hence the #ifdef wrapper. */ - -#define DH_KDF_MAX (1L << 30) - -/* Skip past an ASN1 structure: for OBJECT skip content octets too */ - -static int skip_asn1(unsigned char **pp, long *plen, int exptag) -{ - const unsigned char *q = *pp; - int i, tag, xclass; - long tmplen; - i = ASN1_get_object(&q, &tmplen, &tag, &xclass, *plen); - if (i & 0x80) - return 0; - if (tag != exptag || xclass != V_ASN1_UNIVERSAL) - return 0; - if (tag == V_ASN1_OBJECT) - q += tmplen; - *plen -= q - *pp; - *pp = (unsigned char *)q; - return 1; -} - -/* - * Encode the DH shared info structure, return an offset to the counter value - * so we can update the structure without reencoding it. - */ - -static int dh_sharedinfo_encode(unsigned char **pder, unsigned char **pctr, - ASN1_OBJECT *key_oid, size_t outlen, - const unsigned char *ukm, size_t ukmlen) -{ - unsigned char *p; - int derlen; - long tlen; - /* "magic" value to check offset is sane */ - static unsigned char ctr[4] = { 0xF3, 0x17, 0x22, 0x53 }; - X509_ALGOR atmp; - ASN1_OCTET_STRING ctr_oct, ukm_oct, *pukm_oct; - ASN1_TYPE ctr_atype; - if (ukmlen > DH_KDF_MAX || outlen > DH_KDF_MAX) - return 0; - ctr_oct.data = ctr; - ctr_oct.length = 4; - ctr_oct.flags = 0; - ctr_oct.type = V_ASN1_OCTET_STRING; - ctr_atype.type = V_ASN1_OCTET_STRING; - ctr_atype.value.octet_string = &ctr_oct; - atmp.algorithm = key_oid; - atmp.parameter = &ctr_atype; - if (ukm) { - ukm_oct.type = V_ASN1_OCTET_STRING; - ukm_oct.flags = 0; - ukm_oct.data = (unsigned char *)ukm; - ukm_oct.length = ukmlen; - pukm_oct = &ukm_oct; - } else - pukm_oct = NULL; - derlen = CMS_SharedInfo_encode(pder, &atmp, pukm_oct, outlen); - if (derlen <= 0) - return 0; - p = *pder; - tlen = derlen; - if (!skip_asn1(&p, &tlen, V_ASN1_SEQUENCE)) - return 0; - if (!skip_asn1(&p, &tlen, V_ASN1_SEQUENCE)) - return 0; - if (!skip_asn1(&p, &tlen, V_ASN1_OBJECT)) - return 0; - if (!skip_asn1(&p, &tlen, V_ASN1_OCTET_STRING)) - return 0; - if (CRYPTO_memcmp(p, ctr, 4)) - return 0; - *pctr = p; - return derlen; -} - -int DH_KDF_X9_42(unsigned char *out, size_t outlen, - const unsigned char *Z, size_t Zlen, - ASN1_OBJECT *key_oid, - const unsigned char *ukm, size_t ukmlen, const EVP_MD *md) -{ - EVP_MD_CTX *mctx = NULL; - int rv = 0; - unsigned int i; - size_t mdlen; - unsigned char *der = NULL, *ctr; - int derlen; - if (Zlen > DH_KDF_MAX) - return 0; - mctx = EVP_MD_CTX_new(); - if (mctx == NULL) - return 0; - mdlen = EVP_MD_size(md); - derlen = dh_sharedinfo_encode(&der, &ctr, key_oid, outlen, ukm, ukmlen); - if (derlen == 0) - goto err; - for (i = 1;; i++) { - unsigned char mtmp[EVP_MAX_MD_SIZE]; - if (!EVP_DigestInit_ex(mctx, md, NULL) - || !EVP_DigestUpdate(mctx, Z, Zlen)) - goto err; - ctr[3] = i & 0xFF; - ctr[2] = (i >> 8) & 0xFF; - ctr[1] = (i >> 16) & 0xFF; - ctr[0] = (i >> 24) & 0xFF; - if (!EVP_DigestUpdate(mctx, der, derlen)) - goto err; - if (outlen >= mdlen) { - if (!EVP_DigestFinal(mctx, out, NULL)) - goto err; - outlen -= mdlen; - if (outlen == 0) - break; - out += mdlen; - } else { - if (!EVP_DigestFinal(mctx, mtmp, NULL)) - goto err; - memcpy(out, mtmp, outlen); - OPENSSL_cleanse(mtmp, mdlen); - break; - } - } - rv = 1; - err: - OPENSSL_free(der); - EVP_MD_CTX_free(mctx); - return rv; -} -#endif |