211 lines
6.9 KiB
C
211 lines
6.9 KiB
C
/*
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* Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/pkcs12.h>
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#include <openssl/trace.h>
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/*
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* Encrypt/Decrypt a buffer based on password and algor, result in a
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* OPENSSL_malloc'ed buffer
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*/
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unsigned char *PKCS12_pbe_crypt_ex(const X509_ALGOR *algor,
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const char *pass, int passlen,
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const unsigned char *in, int inlen,
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unsigned char **data, int *datalen, int en_de,
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OSSL_LIB_CTX *libctx, const char *propq)
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{
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unsigned char *out = NULL;
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int outlen, i;
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EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
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int max_out_len, mac_len = 0;
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if (ctx == NULL) {
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ERR_raise(ERR_LIB_PKCS12, ERR_R_EVP_LIB);
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goto err;
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}
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/* Process data */
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if (!EVP_PBE_CipherInit_ex(algor->algorithm, pass, passlen,
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algor->parameter, ctx, en_de, libctx, propq))
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goto err;
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/*
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* GOST algorithm specifics:
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* OMAC algorithm calculate and encrypt MAC of the encrypted objects
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* It's appended to encrypted text on encrypting
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* MAC should be processed on decrypting separately from plain text
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*/
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max_out_len = inlen + EVP_CIPHER_CTX_get_block_size(ctx);
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if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
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& EVP_CIPH_FLAG_CIPHER_WITH_MAC) != 0) {
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if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_TLS1_AAD, 0, &mac_len) < 0) {
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ERR_raise(ERR_LIB_PKCS12, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
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max_out_len += mac_len;
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} else {
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if (inlen < mac_len) {
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ERR_raise(ERR_LIB_PKCS12, PKCS12_R_UNSUPPORTED_PKCS12_MODE);
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goto err;
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}
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inlen -= mac_len;
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if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG,
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(int)mac_len, (unsigned char *)in+inlen) < 0) {
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ERR_raise(ERR_LIB_PKCS12, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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}
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}
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if ((out = OPENSSL_malloc(max_out_len)) == NULL)
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goto err;
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if (!EVP_CipherUpdate(ctx, out, &i, in, inlen)) {
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OPENSSL_free(out);
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out = NULL;
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ERR_raise(ERR_LIB_PKCS12, ERR_R_EVP_LIB);
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goto err;
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}
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outlen = i;
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if (!EVP_CipherFinal_ex(ctx, out + i, &i)) {
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OPENSSL_free(out);
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out = NULL;
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ERR_raise_data(ERR_LIB_PKCS12, PKCS12_R_PKCS12_CIPHERFINAL_ERROR,
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passlen == 0 ? "empty password"
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: "maybe wrong password");
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goto err;
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}
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outlen += i;
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if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
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& EVP_CIPH_FLAG_CIPHER_WITH_MAC) != 0) {
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if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
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if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG,
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(int)mac_len, out+outlen) < 0) {
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OPENSSL_free(out);
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out = NULL;
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ERR_raise(ERR_LIB_PKCS12, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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outlen += mac_len;
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}
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}
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if (datalen)
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*datalen = outlen;
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if (data)
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*data = out;
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err:
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EVP_CIPHER_CTX_free(ctx);
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return out;
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}
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unsigned char *PKCS12_pbe_crypt(const X509_ALGOR *algor,
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const char *pass, int passlen,
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const unsigned char *in, int inlen,
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unsigned char **data, int *datalen, int en_de)
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{
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return PKCS12_pbe_crypt_ex(algor, pass, passlen, in, inlen, data, datalen,
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en_de, NULL, NULL);
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}
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/*
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* Decrypt an OCTET STRING and decode ASN1 structure if zbuf set zero buffer
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* after use.
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*/
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void *PKCS12_item_decrypt_d2i_ex(const X509_ALGOR *algor, const ASN1_ITEM *it,
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const char *pass, int passlen,
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const ASN1_OCTET_STRING *oct, int zbuf,
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OSSL_LIB_CTX *libctx,
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const char *propq)
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{
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unsigned char *out = NULL;
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const unsigned char *p;
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void *ret;
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int outlen = 0;
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if (!PKCS12_pbe_crypt_ex(algor, pass, passlen, oct->data, oct->length,
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&out, &outlen, 0, libctx, propq))
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return NULL;
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p = out;
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OSSL_TRACE_BEGIN(PKCS12_DECRYPT) {
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BIO_printf(trc_out, "\n");
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BIO_dump(trc_out, out, outlen);
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BIO_printf(trc_out, "\n");
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} OSSL_TRACE_END(PKCS12_DECRYPT);
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ret = ASN1_item_d2i(NULL, &p, outlen, it);
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if (zbuf)
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OPENSSL_cleanse(out, outlen);
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if (!ret)
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ERR_raise(ERR_LIB_PKCS12, PKCS12_R_DECODE_ERROR);
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OPENSSL_free(out);
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return ret;
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}
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void *PKCS12_item_decrypt_d2i(const X509_ALGOR *algor, const ASN1_ITEM *it,
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const char *pass, int passlen,
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const ASN1_OCTET_STRING *oct, int zbuf)
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{
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return PKCS12_item_decrypt_d2i_ex(algor, it, pass, passlen, oct, zbuf,
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NULL, NULL);
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}
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/*
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* Encode ASN1 structure and encrypt, return OCTET STRING if zbuf set zero
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* encoding.
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*/
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ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt_ex(X509_ALGOR *algor,
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const ASN1_ITEM *it,
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const char *pass, int passlen,
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void *obj, int zbuf,
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OSSL_LIB_CTX *ctx,
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const char *propq)
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{
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ASN1_OCTET_STRING *oct = NULL;
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unsigned char *in = NULL;
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int inlen;
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if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
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ERR_raise(ERR_LIB_PKCS12, ERR_R_ASN1_LIB);
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goto err;
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}
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inlen = ASN1_item_i2d(obj, &in, it);
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if (!in) {
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ERR_raise(ERR_LIB_PKCS12, PKCS12_R_ENCODE_ERROR);
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goto err;
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}
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if (!PKCS12_pbe_crypt_ex(algor, pass, passlen, in, inlen, &oct->data,
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&oct->length, 1, ctx, propq)) {
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ERR_raise(ERR_LIB_PKCS12, PKCS12_R_ENCRYPT_ERROR);
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OPENSSL_free(in);
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goto err;
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}
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if (zbuf)
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OPENSSL_cleanse(in, inlen);
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OPENSSL_free(in);
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return oct;
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err:
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ASN1_OCTET_STRING_free(oct);
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return NULL;
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}
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ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor,
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const ASN1_ITEM *it,
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const char *pass, int passlen,
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void *obj, int zbuf)
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{
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return PKCS12_item_i2d_encrypt_ex(algor, it, pass, passlen, obj, zbuf, NULL, NULL);
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}
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