add content/stream callback example

Author: JacobBarthelmeh

.gitignore

@@ -177,10 +177,12 @@ pkcs7/compressedData
 pkcs7/*.der
 pkcs7/envelopedData-kari
 pkcs7/envelopedData-ktri
+pkcs7/envelopedData-ktri-stream
 pkcs7/envelopedData-kekri
 pkcs7/envelopedData-pwri
 pkcs7/envelopedData-ori
 pkcs7/signedData
+pkcs7/signedData-stream
 pkcs7/signedData-cryptodev
 pkcs7/signedData-FirmwarePkgData
 pkcs7/signedData-DetachedSignature

pkcs7/envelopedData-ktri-stream.c

@@ -0,0 +1,292 @@
+/* envelopedData-ktri-stream.c
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL. (formerly known as CyaSSL)
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <wolfssl/options.h>
+#include <wolfssl/wolfcrypt/settings.h>
+#include <wolfssl/wolfcrypt/pkcs7.h>
+#include <wolfssl/wolfcrypt/error-crypt.h>
+#include <wolfssl/wolfcrypt/logging.h>
+
+#define certFile "../certs/client-cert.der"
+#define keyFile  "../certs/client-key.der"
+
+#define encodedFileKTRI "envelopedDataKTRI-stream.der"
+
+FILE *fileOut, *fileIn;
+#define TEST_SIZE 256
+static byte* contentRead = NULL;
+
+static int GetContentCB(PKCS7* pkcs7, byte** content)
+{
+    int ret;
+
+    ret = fread(contentRead, 1, TEST_SIZE, fileIn);
+    *content = contentRead;
+
+    return ret;
+}
+
+
+static int StreamOutputCB(PKCS7* pkcs7, const byte* output, word32 outputSz)
+{
+    if (outputSz > 0) {
+        if (fwrite(output, 1, outputSz, fileOut) != outputSz) {
+            return -1;
+        }
+    }
+    return 0;
+}
+
+
+static int load_certs(byte* cert, word32* certSz, byte* key, word32* keySz)
+{
+    FILE* file;
+
+    /* certificate file */
+    file = fopen(certFile, "rb");
+    if (!file)
+        return -1;
+
+    *certSz = (word32)fread(cert, 1, *certSz, file);
+    fclose(file);
+
+    /* key file */
+    file = fopen(keyFile, "rb");
+    if (!file)
+        return -1;
+
+    *keySz = (word32)fread(key, 1, *keySz, file);
+    fclose(file);
+
+    return 0;
+}
+
+
+static int envelopedData_encrypt(byte* cert, word32 certSz, byte* key,
+                                 word32 keySz, byte* out, word32 outSz,
+                                 word32 contentSz, byte useStreamMode)
+{
+    int ret;
+    PKCS7* pkcs7;
+
+    pkcs7 = wc_PKCS7_New(NULL, INVALID_DEVID);
+    if (pkcs7 == NULL)
+        return -1;
+
+    pkcs7->content        = NULL;
+    pkcs7->contentSz      = contentSz;
+    pkcs7->contentOID     = DATA;
+    pkcs7->encryptOID     = AES256CBCb;
+
+    if (useStreamMode) {
+        wc_PKCS7_SetStreamMode(pkcs7, 1, GetContentCB, StreamOutputCB);
+    }
+
+    /* add recipient using RSA certificate (KTRI type) */
+    ret = wc_PKCS7_AddRecipient_KTRI(pkcs7, cert, certSz, 0);
+    if (ret < 0) {
+        printf("wc_PKCS7_AddRecipient_KTRI() failed, ret = %d\n", ret);
+        wc_PKCS7_Free(pkcs7);
+        return -1;
+    }
+
+    /* encode envelopedData, returns size */
+    ret = wc_PKCS7_EncodeEnvelopedData(pkcs7, out, outSz);
+    if (ret <= 0) {
+        printf("ERROR: wc_PKCS7_EncodeEnvelopedData() failed, ret = %d\n", ret);
+        wc_PKCS7_Free(pkcs7);
+        return -1;
+
+    } else {
+        printf("Successfully encoded EnvelopedData bundle (%s), stream mode"
+               " %d\n", encodedFileKTRI, useStreamMode);
+    }
+
+    wc_PKCS7_Free(pkcs7);
+
+    return ret;
+}
+
+static int envelopedData_decrypt(byte* in, word32 inSz, byte* cert,
+                                word32 certSz, byte* key, word32 keySz,
+                                byte* out, word32 outSz)
+{
+    int ret;
+    PKCS7* pkcs7;
+
+    pkcs7 = wc_PKCS7_New(NULL, INVALID_DEVID);
+    if (pkcs7 == NULL)
+        return -1;
+
+    /* init with recipient cert */
+    ret = wc_PKCS7_InitWithCert(pkcs7, cert, certSz);
+    if (ret != 0) {
+        wc_PKCS7_Free(pkcs7);
+        return -1;
+    }
+
+    /* set recipient private key */
+    ret = wc_PKCS7_SetKey(pkcs7, key, keySz);
+    if (ret != 0) {
+        wc_PKCS7_Free(pkcs7);
+        return -1;
+    }
+
+    /* decode envelopedData, returns size */
+    ret = wc_PKCS7_DecodeEnvelopedData(pkcs7, in, inSz, out, outSz);
+    if (ret <= 0) {
+        printf("Failed to decode EnvelopedData bundle (%s), error %d\n",
+                encodedFileKTRI, ret);
+        wc_PKCS7_Free(pkcs7);
+        return -1;
+    } else {
+        printf("Successfully decoded EnvelopedData bundle (%s)\n",
+                encodedFileKTRI);
+    }
+
+    wc_PKCS7_Free(pkcs7);
+
+    return ret;
+}
+
+#if defined(HAVE_PKCS7) && defined(ASN_BER_TO_DER)
+
+#define EXTRA_ASN1_SIZE 1024
+
+int main(int argc, char** argv)
+{
+    int ret = 0;
+    int encryptedSz = 0, decryptedSz;
+    word32 certSz, keySz, contentSz;
+
+    byte cert[2048];
+    byte key[2048];
+    byte* encrypted = NULL;
+    byte* decrypted = NULL;
+
+#ifdef DEBUG_WOLFSSL
+    wolfSSL_Debugging_ON();
+#endif
+
+    if (argc != 2) {
+        printf("USAGE: ./%s <content file name>\n", argv[0]);
+        return -1;
+    }
+
+    if (wolfCrypt_Init() != 0) {
+        printf("Issue with wolfcrypt init\n");
+        return -1;
+    }
+
+    fileIn  = fopen(argv[1], "rb");
+    if (fileIn == NULL) {
+        printf("Issue opening file %s\n", argv[1]);
+        return -1;
+    }
+
+    fileOut = fopen(encodedFileKTRI, "wb");
+    if (fileOut == NULL) {
+        printf("Issue opening file %s\n", encodedFileKTRI);
+        fclose(fileIn);
+        return -1;
+    }
+
+    contentRead = (byte*)XMALLOC(TEST_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+    if (contentRead == NULL) {
+        printf("Unable to malloc content read buffer\n");
+        ret = MEMORY_E;
+    }
+
+    if (ret == 0) {
+        fseek(fileIn, 0, SEEK_END);
+        contentSz = ftell(fileIn);
+        fseek(fileIn, 0, SEEK_SET);
+        printf("contentSz = %d\n", contentSz);
+
+        certSz = sizeof(cert);
+        keySz = sizeof(key);
+        ret = load_certs(cert, &certSz, key, &keySz);
+    }
+
+    if (ret == 0) {
+        encryptedSz = envelopedData_encrypt(cert, certSz, key, keySz,
+                                    encrypted, encryptedSz, contentSz, 1);
+        if (encryptedSz < 0) {
+            ret = encryptedSz;
+            printf("Issue %d with encrypt\n", ret);
+        }
+    }
+    fclose(fileIn);
+    fclose(fileOut);
+
+
+#if 1
+    decryptedSz = encryptedSz = contentSz + EXTRA_ASN1_SIZE;
+    if (ret == 0) {
+        encrypted = (byte*)XMALLOC(encryptedSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+        decrypted = (byte*)XMALLOC(decryptedSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+        if (encrypted == NULL || decrypted == NULL) {
+            ret = MEMORY_E;
+        }
+    }
+
+    if (ret == 0) {
+        FILE* f = fopen(encodedFileKTRI, "rb");
+        encryptedSz = fread(encrypted, 1, encryptedSz, f);
+        fclose(f);
+        if (encryptedSz <= 0) {
+            printf("error reading file %s\n", encodedFileKTRI);
+            ret = -1;
+        }
+    }
+
+    if (ret == 0) {
+        decryptedSz = envelopedData_decrypt(encrypted, encryptedSz,
+                                        cert, certSz, key, keySz,
+                                        decrypted, decryptedSz);
+        if (decryptedSz < 0) {
+            ret = decryptedSz;
+            printf("Issue %d with decrypt\n", ret);
+        }
+    }
+
+#endif
+
+    if (contentRead != NULL)
+        XFREE(contentRead, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+    if (encrypted != NULL)
+        XFREE(encrypted, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+    if (decrypted != NULL)
+        XFREE(decrypted, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+
+    return ret;
+}
+
+#else
+
+int main(int argc, char** argv)
+{
+    printf("Must build wolfSSL using ./configure --enable-pkcs7 --enable-indef\n");
+    return 0;
+}
+
+#endif
+

pkcs7/envelopedData-ktri.c

@@ -95,7 +95,7 @@ static int envelopedData_encrypt(byte* cert, word32 certSz, byte* key,
     pkcs7->encryptOID     = AES256CBCb;
 
     if (useStreamMode) {
-        wc_PKCS7_SetStreamMode(pkcs7, 1);
+        wc_PKCS7_SetStreamMode(pkcs7, 1, NULL, NULL);
     }
 
     /* add recipient using RSA certificate (KTRI type) */