163 lines
4.1 KiB
C
163 lines
4.1 KiB
C
/* compressedData.c
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*
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* Copyright (C) 2006-2018 wolfSSL Inc.
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*
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* This file is part of wolfSSL. (formerly known as CyaSSL)
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <wolfssl/options.h>
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#include <wolfssl/wolfcrypt/settings.h>
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#include <wolfssl/wolfcrypt/pkcs7.h>
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#include <wolfssl/wolfcrypt/error-crypt.h>
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#include <wolfssl/wolfcrypt/logging.h>
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#define compressedFile "compressedData.der"
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#if defined(HAVE_PKCS7) && defined(HAVE_LIBZ) && \
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!defined(NO_PKCS7_COMPRESSED_DATA)
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static const byte data[] = { /* Hello World */
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0x48,0x65,0x6c,0x6c,0x6f,0x20,0x57,0x6f,
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0x72,0x6c,0x64
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};
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static int write_file_buffer(const char* fileName, byte* in, word32 inSz)
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{
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int ret;
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FILE* file;
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file = fopen(fileName, "wb");
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if (file == NULL) {
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printf("ERROR: opening file for writing: %s\n", fileName);
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return -1;
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}
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ret = (int)fwrite(in, 1, inSz, file);
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if (ret == 0) {
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printf("ERROR: writing buffer to output file\n");
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return -1;
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}
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fclose(file);
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return 0;
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}
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static int compressedData_encode(byte* out, word32 outSz)
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{
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int ret;
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PKCS7* pkcs7;
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pkcs7 = wc_PKCS7_New(NULL, 0);
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if (pkcs7 == NULL)
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return -1;
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pkcs7->content = (byte*)data;
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pkcs7->contentSz = sizeof(data);
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pkcs7->contentOID = DATA;
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/* encode compressedData, returns size */
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ret = wc_PKCS7_EncodeCompressedData(pkcs7, out, outSz);
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if (ret <= 0) {
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wc_PKCS7_Free(pkcs7);
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return -1;
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} else {
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printf("Successfully encoded CompressedData bundle (%s)\n",
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compressedFile);
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if (write_file_buffer(compressedFile, out, ret) != 0) {
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printf("ERROR: error writing encoded to output file\n");
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return -1;
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}
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}
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wc_PKCS7_Free(pkcs7);
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return ret;
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}
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static int compressedData_decode(byte* in, word32 inSz, byte* out, word32 outSz)
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{
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int ret;
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PKCS7* pkcs7;
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pkcs7 = wc_PKCS7_New(NULL, 0);
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if (pkcs7 == NULL)
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return -1;
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/* decode compressedData, returns size */
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ret = wc_PKCS7_DecodeCompressedData(pkcs7, in, inSz, out, outSz);
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if (ret <= 0 || (XMEMCMP(out, data, ret) != 0)) {
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printf("Failed to decode CompressedData bundle (%s)\n",
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compressedFile);
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wc_PKCS7_Free(pkcs7);
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return -1;
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} else {
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printf("Successfully decoded CompressedData bundle (%s)\n",
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compressedFile);
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}
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wc_PKCS7_Free(pkcs7);
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return ret;
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}
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int main(int argc, char** argv)
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{
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int compressedSz, decodedSz;
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byte compressed[1024];
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byte decoded[1024];
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#ifdef DEBUG_WOLFSSL
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wolfSSL_Debugging_ON();
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#endif
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compressedSz = compressedData_encode(compressed, sizeof(compressed));
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if (compressedSz < 0)
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return -1;
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#ifdef DEBUG_WOLFSSL
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printf("CompressedData DER (%d bytes):\n", compressedSz);
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WOLFSSL_BUFFER(compressed, compressedSz);
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#endif
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decodedSz = compressedData_decode(compressed, compressedSz,
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decoded, sizeof(decoded));
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if (decodedSz < 0)
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return -1;
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#ifdef DEBUG_WOLFSSL
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printf("Decoded Data DER (%d bytes):\n", decodedSz);
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WOLFSSL_BUFFER(decoded, decodedSz);
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#endif
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(void)argc;
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(void)argv;
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return 0;
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}
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#else
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int main(int argc, char** argv)
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{
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printf("Must build wolfSSL using ./configure --enable-pkcs7 --with-libz\n");
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return 0;
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}
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#endif /* HAVE_PKCS7 & HAVE_LIBZ & !NO_PKCS7_COMPRESSED_DATA */
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