154 lines
4.5 KiB
C
154 lines
4.5 KiB
C
/*
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* RSA simple data encryption program
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "mbedtls/build_info.h"
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#include "mbedtls/platform.h"
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#if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_PK_PARSE_C) && \
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defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
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defined(MBEDTLS_CTR_DRBG_C)
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#include "mbedtls/error.h"
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#include "mbedtls/pk.h"
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#include "mbedtls/entropy.h"
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#include "mbedtls/ctr_drbg.h"
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#include <stdio.h>
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#include <string.h>
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#endif
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#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_PK_PARSE_C) || \
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!defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_FS_IO) || \
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!defined(MBEDTLS_CTR_DRBG_C)
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int main(void)
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{
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mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_PK_PARSE_C and/or "
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"MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO and/or "
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"MBEDTLS_CTR_DRBG_C not defined.\n");
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mbedtls_exit(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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FILE *f;
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int ret = 1;
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int exit_code = MBEDTLS_EXIT_FAILURE;
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size_t i, olen = 0;
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mbedtls_pk_context pk;
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mbedtls_entropy_context entropy;
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mbedtls_ctr_drbg_context ctr_drbg;
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unsigned char input[1024];
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unsigned char buf[512];
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const char *pers = "mbedtls_pk_encrypt";
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mbedtls_ctr_drbg_init(&ctr_drbg);
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mbedtls_entropy_init(&entropy);
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mbedtls_pk_init(&pk);
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if (argc != 3) {
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mbedtls_printf("usage: mbedtls_pk_encrypt <key_file> <string of max 100 characters>\n");
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#if defined(_WIN32)
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mbedtls_printf("\n");
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#endif
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goto exit;
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}
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mbedtls_printf("\n . Seeding the random number generator...");
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fflush(stdout);
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if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func,
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&entropy, (const unsigned char *) pers,
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strlen(pers))) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n",
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(unsigned int) -ret);
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goto exit;
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}
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mbedtls_printf("\n . Reading public key from '%s'", argv[1]);
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fflush(stdout);
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if ((ret = mbedtls_pk_parse_public_keyfile(&pk, argv[1])) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_pk_parse_public_keyfile returned -0x%04x\n",
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(unsigned int) -ret);
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goto exit;
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}
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if (strlen(argv[2]) > 100) {
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mbedtls_printf(" Input data larger than 100 characters.\n\n");
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goto exit;
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}
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memcpy(input, argv[2], strlen(argv[2]));
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/*
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* Calculate the RSA encryption of the hash.
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*/
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mbedtls_printf("\n . Generating the encrypted value");
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fflush(stdout);
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if ((ret = mbedtls_pk_encrypt(&pk, input, strlen(argv[2]),
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buf, &olen, sizeof(buf),
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mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_pk_encrypt returned -0x%04x\n",
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(unsigned int) -ret);
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goto exit;
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}
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/*
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* Write the signature into result-enc.txt
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*/
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if ((f = fopen("result-enc.txt", "wb+")) == NULL) {
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mbedtls_printf(" failed\n ! Could not create %s\n\n",
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"result-enc.txt");
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ret = 1;
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goto exit;
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}
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for (i = 0; i < olen; i++) {
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mbedtls_fprintf(f, "%02X%s", buf[i],
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(i + 1) % 16 == 0 ? "\r\n" : " ");
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}
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fclose(f);
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mbedtls_printf("\n . Done (created \"%s\")\n\n", "result-enc.txt");
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exit_code = MBEDTLS_EXIT_SUCCESS;
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exit:
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mbedtls_pk_free(&pk);
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mbedtls_entropy_free(&entropy);
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mbedtls_ctr_drbg_free(&ctr_drbg);
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#if defined(MBEDTLS_ERROR_C)
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if (exit_code != MBEDTLS_EXIT_SUCCESS) {
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mbedtls_strerror(ret, (char *) buf, sizeof(buf));
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mbedtls_printf(" ! Last error was: %s\n", buf);
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}
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#endif
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mbedtls_exit(exit_code);
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}
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#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_ENTROPY_C &&
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MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
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