Extend AES minimal and rdseed examples #563
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,221 @@ | ||
| /* aesgcm-file-minimal.c | ||
| * | ||
| * Copyright (C) 2006-2026 wolfSSL Inc. | ||
| * | ||
| * This file is part of wolfSSL. | ||
| * | ||
| * 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 02110-1335, USA | ||
| */ | ||
|
|
||
| #ifndef WOLFSSL_USER_SETTINGS | ||
| #include <wolfssl/options.h> | ||
| #endif | ||
| #include <wolfssl/wolfcrypt/aes.h> | ||
| #include <wolfssl/wolfcrypt/random.h> | ||
|
|
||
| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
|
|
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| #define KEY_SZ AES_256_KEY_SIZE | ||
| #define NONCE_SZ GCM_NONCE_MID_SZ | ||
| #define TAG_SZ AES_BLOCK_SIZE | ||
|
|
||
| static int Encrypt(const byte* key, const byte* iv, const byte* in, | ||
| word32 inSz, byte* out, byte* tag) | ||
| { | ||
| Aes aes; | ||
| int ret; | ||
| ret = wc_AesInit(&aes, NULL, INVALID_DEVID); | ||
| if (ret == 0) { | ||
| ret = wc_AesGcmSetKey(&aes, key, KEY_SZ); | ||
| } | ||
| if (ret == 0) { | ||
| ret = wc_AesGcmEncrypt(&aes, out, in, inSz, iv, NONCE_SZ, | ||
| tag, TAG_SZ, NULL, 0); | ||
| } | ||
| wc_AesFree(&aes); | ||
| return ret; | ||
| } | ||
|
|
||
| static int Decrypt(const byte* key, const byte* iv, const byte* in, | ||
| word32 inSz, byte* out, const byte* tag) | ||
| { | ||
| Aes aes; | ||
| int ret; | ||
| ret = wc_AesInit(&aes, NULL, INVALID_DEVID); | ||
| if (ret == 0) { | ||
| ret = wc_AesGcmSetKey(&aes, key, KEY_SZ); | ||
| } | ||
| if (ret == 0) { | ||
| ret = wc_AesGcmDecrypt(&aes, out, in, inSz, iv, NONCE_SZ, | ||
| tag, TAG_SZ, NULL, 0); | ||
| } | ||
| wc_AesFree(&aes); | ||
| return ret; | ||
| } | ||
|
|
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| static int ReadFile(const char* path, byte** data, word32* sz) | ||
| { | ||
| FILE* file; | ||
| long fileSz; | ||
| byte* buf; | ||
|
|
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| *data = NULL; | ||
| *sz = 0; | ||
| file = fopen(path, "rb"); | ||
| if (file == NULL) { | ||
| return -1; | ||
| } | ||
| if (fseek(file, 0, SEEK_END) != 0) { | ||
| fclose(file); | ||
| return -1; | ||
| } | ||
| fileSz = ftell(file); | ||
| if (fileSz < 0) { | ||
| fclose(file); | ||
| return -1; | ||
| } | ||
| if (fseek(file, 0, SEEK_SET) != 0) { | ||
| fclose(file); | ||
| return -1; | ||
| } | ||
| buf = (byte*)malloc((size_t)fileSz); | ||
| if (buf == NULL && fileSz != 0) { | ||
| fclose(file); | ||
| return -1; | ||
| } | ||
| if (fileSz != 0 && fread(buf, 1, (size_t)fileSz, file) != (size_t)fileSz) { | ||
| free(buf); | ||
| fclose(file); | ||
| return -1; | ||
| } | ||
| fclose(file); | ||
| *data = buf; | ||
| *sz = fileSz; | ||
| return 0; | ||
| } | ||
|
|
||
| static int WriteFile(const char* path, const byte* data, long dataSz) | ||
| { | ||
| FILE* file = fopen(path, "wb"); | ||
| if (file == NULL) { | ||
| return -1; | ||
| } | ||
| if (dataSz != 0 && | ||
| fwrite(data, 1, (size_t)dataSz, file) != (size_t)dataSz) { | ||
| fclose(file); | ||
| return -1; | ||
| } | ||
| fclose(file); | ||
| return 0; | ||
| } | ||
|
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| static void print_hex(const char* label, const byte* data, word32 sz) | ||
| { | ||
| word32 i; | ||
| printf("%s: ", label); | ||
| for (i = 0; i < sz; i++) { | ||
| printf("%02x", data[i]); | ||
| } | ||
| printf("\n"); | ||
| } | ||
|
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| int main(int argc, char** argv) | ||
| { | ||
| byte key[KEY_SZ], iv[NONCE_SZ], tag[TAG_SZ]; | ||
| byte* plaintext = NULL; | ||
| byte* ciphertext = NULL; | ||
| byte* decrypted = NULL; | ||
| word32 plaintextSz = 0; | ||
| WC_RNG rng; | ||
| int ret; | ||
|
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| if (argc != 4) { | ||
| printf("Usage: %s <input-file> <encrypted-file> <decrypted-file>\n", | ||
| argv[0]); | ||
| return 1; | ||
| } | ||
|
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| if (ReadFile(argv[1], &plaintext, &plaintextSz) != 0) { | ||
| printf("Failed to read: %s\n", argv[1]); | ||
| return 1; | ||
| } | ||
|
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| ciphertext = (byte*)malloc((size_t)plaintextSz); | ||
| decrypted = (byte*)malloc((size_t)plaintextSz); | ||
| if ((ciphertext == NULL || decrypted == NULL) && plaintextSz != 0) { | ||
| printf("alloc failed\n"); | ||
| ret = 1; | ||
| goto exit; | ||
| } | ||
|
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| ret = wc_InitRng(&rng); | ||
| if (ret == 0) { | ||
| ret = wc_RNG_GenerateBlock(&rng, key, KEY_SZ); | ||
| if (ret == 0) { | ||
| ret = wc_RNG_GenerateBlock(&rng, iv, NONCE_SZ); | ||
| } | ||
| wc_FreeRng(&rng); | ||
| } | ||
| if (ret != 0) { | ||
| printf("Key/IV generation failed: %d\n", ret); | ||
| goto exit; | ||
| } | ||
|
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| ret = Encrypt(key, iv, plaintext, plaintextSz, ciphertext, tag); | ||
| if (ret != 0) { | ||
| printf("Encryption failed: %d\n", ret); | ||
| goto exit; | ||
| } | ||
|
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| if (WriteFile(argv[2], ciphertext, plaintextSz) != 0) { | ||
| printf("Failed to write: %s\n", argv[2]); | ||
| ret = 1; | ||
| goto exit; | ||
| } | ||
|
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| ret = Decrypt(key, iv, ciphertext, plaintextSz, decrypted, tag); | ||
| if (ret != 0) { | ||
| printf("Decryption failed: %d\n", ret); | ||
| goto exit; | ||
| } | ||
|
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| if (WriteFile(argv[3], decrypted, plaintextSz) != 0) { | ||
| printf("Failed to write: %s\n", argv[3]); | ||
| ret = 1; | ||
| goto exit; | ||
| } | ||
|
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| print_hex("Key", key, KEY_SZ); | ||
| print_hex("IV", iv, NONCE_SZ); | ||
| print_hex("Tag", tag, TAG_SZ); | ||
| printf("Encrypted %u bytes to %s\n", plaintextSz, argv[2]); | ||
| printf("Decrypted %u bytes to %s\n", plaintextSz, argv[3]); | ||
|
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| if (memcmp(plaintext, decrypted, (size_t)plaintextSz) == 0) { | ||
| printf("Round-trip OK: decrypted output matches original input\n"); | ||
| } | ||
| else { | ||
| printf("Round-trip FAILED: mismatch\n"); | ||
| ret = 1; | ||
| } | ||
|
|
||
| exit: | ||
| free(decrypted); | ||
| free(ciphertext); | ||
| free(plaintext); | ||
| return ret; | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| CC=gcc | ||
| CFLAGS=-Wall -DWOLFSSL_USER_SETTINGS -I. | ||
| WOLFSSL_INSTALL_DIR=/usr/local | ||
| LIBS=-L$(WOLFSSL_INSTALL_DIR)/lib -lwolfssl -lm | ||
|
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| all: aesgcm-rdseed | ||
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| aesgcm-rdseed: aesgcm-rdseed.o | ||
| $(CC) -o $@ $^ $(CFLAGS) $(LIBS) | ||
|
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| .PHONY: clean | ||
|
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| clean: | ||
| rm -f *.o aesgcm-rdseed |
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