| /* |
| * Key writing application |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later |
| */ |
| |
| #include "mbedtls/build_info.h" |
| |
| #include "mbedtls/platform.h" |
| |
| #if !defined(MBEDTLS_PK_PARSE_C) || \ |
| !defined(MBEDTLS_PK_WRITE_C) || \ |
| !defined(MBEDTLS_FS_IO) || \ |
| !defined(MBEDTLS_ENTROPY_C) || \ |
| !defined(MBEDTLS_CTR_DRBG_C) || \ |
| !defined(MBEDTLS_BIGNUM_C) |
| int main(void) |
| { |
| mbedtls_printf("MBEDTLS_PK_PARSE_C and/or MBEDTLS_PK_WRITE_C and/or " |
| "MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C and/or " |
| "MBEDTLS_FS_IO and/or MBEDTLS_BIGNUM_C not defined.\n"); |
| mbedtls_exit(0); |
| } |
| #else |
| |
| #include "mbedtls/error.h" |
| #include "mbedtls/pk.h" |
| #include "mbedtls/error.h" |
| |
| #include "mbedtls/entropy.h" |
| #include "mbedtls/ctr_drbg.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #if defined(MBEDTLS_PEM_WRITE_C) |
| #define USAGE_OUT \ |
| " output_file=%%s default: keyfile.pem\n" \ |
| " output_format=pem|der default: pem\n" |
| #else |
| #define USAGE_OUT \ |
| " output_file=%%s default: keyfile.der\n" \ |
| " output_format=der default: der\n" |
| #endif |
| |
| #if defined(MBEDTLS_PEM_WRITE_C) |
| #define DFL_OUTPUT_FILENAME "keyfile.pem" |
| #define DFL_OUTPUT_FORMAT OUTPUT_FORMAT_PEM |
| #else |
| #define DFL_OUTPUT_FILENAME "keyfile.der" |
| #define DFL_OUTPUT_FORMAT OUTPUT_FORMAT_DER |
| #endif |
| |
| #define DFL_MODE MODE_NONE |
| #define DFL_FILENAME "keyfile.key" |
| #define DFL_DEBUG_LEVEL 0 |
| #define DFL_OUTPUT_MODE OUTPUT_MODE_NONE |
| |
| #define MODE_NONE 0 |
| #define MODE_PRIVATE 1 |
| #define MODE_PUBLIC 2 |
| |
| #define OUTPUT_MODE_NONE 0 |
| #define OUTPUT_MODE_PRIVATE 1 |
| #define OUTPUT_MODE_PUBLIC 2 |
| |
| #define OUTPUT_FORMAT_PEM 0 |
| #define OUTPUT_FORMAT_DER 1 |
| |
| #define USAGE \ |
| "\n usage: key_app_writer param=<>...\n" \ |
| "\n acceptable parameters:\n" \ |
| " mode=private|public default: none\n" \ |
| " filename=%%s default: keyfile.key\n" \ |
| " output_mode=private|public default: none\n" \ |
| USAGE_OUT \ |
| "\n" |
| |
| |
| /* |
| * global options |
| */ |
| struct options { |
| int mode; /* the mode to run the application in */ |
| const char *filename; /* filename of the key file */ |
| int output_mode; /* the output mode to use */ |
| const char *output_file; /* where to store the constructed key file */ |
| int output_format; /* the output format to use */ |
| } opt; |
| |
| static int write_public_key(mbedtls_pk_context *key, const char *output_file) |
| { |
| int ret; |
| FILE *f; |
| unsigned char output_buf[16000]; |
| unsigned char *c = output_buf; |
| size_t len = 0; |
| |
| memset(output_buf, 0, 16000); |
| |
| #if defined(MBEDTLS_PEM_WRITE_C) |
| if (opt.output_format == OUTPUT_FORMAT_PEM) { |
| if ((ret = mbedtls_pk_write_pubkey_pem(key, output_buf, 16000)) != 0) { |
| return ret; |
| } |
| |
| len = strlen((char *) output_buf); |
| } else |
| #endif |
| { |
| if ((ret = mbedtls_pk_write_pubkey_der(key, output_buf, 16000)) < 0) { |
| return ret; |
| } |
| |
| len = ret; |
| c = output_buf + sizeof(output_buf) - len; |
| } |
| |
| if ((f = fopen(output_file, "w")) == NULL) { |
| return -1; |
| } |
| |
| if (fwrite(c, 1, len, f) != len) { |
| fclose(f); |
| return -1; |
| } |
| |
| fclose(f); |
| |
| return 0; |
| } |
| |
| static int write_private_key(mbedtls_pk_context *key, const char *output_file) |
| { |
| int ret; |
| FILE *f; |
| unsigned char output_buf[16000]; |
| unsigned char *c = output_buf; |
| size_t len = 0; |
| |
| memset(output_buf, 0, 16000); |
| |
| #if defined(MBEDTLS_PEM_WRITE_C) |
| if (opt.output_format == OUTPUT_FORMAT_PEM) { |
| if ((ret = mbedtls_pk_write_key_pem(key, output_buf, 16000)) != 0) { |
| return ret; |
| } |
| |
| len = strlen((char *) output_buf); |
| } else |
| #endif |
| { |
| if ((ret = mbedtls_pk_write_key_der(key, output_buf, 16000)) < 0) { |
| return ret; |
| } |
| |
| len = ret; |
| c = output_buf + sizeof(output_buf) - len; |
| } |
| |
| if ((f = fopen(output_file, "w")) == NULL) { |
| return -1; |
| } |
| |
| if (fwrite(c, 1, len, f) != len) { |
| fclose(f); |
| return -1; |
| } |
| |
| fclose(f); |
| |
| return 0; |
| } |
| |
| #if defined(MBEDTLS_ECP_C) |
| static int show_ecp_key(const mbedtls_ecp_keypair *ecp, int has_private) |
| { |
| int ret = 0; |
| |
| const mbedtls_ecp_curve_info *curve_info = |
| mbedtls_ecp_curve_info_from_grp_id( |
| mbedtls_ecp_keypair_get_group_id(ecp)); |
| mbedtls_printf("curve: %s\n", curve_info->name); |
| |
| mbedtls_ecp_group grp; |
| mbedtls_ecp_group_init(&grp); |
| mbedtls_mpi D; |
| mbedtls_mpi_init(&D); |
| mbedtls_ecp_point pt; |
| mbedtls_ecp_point_init(&pt); |
| mbedtls_mpi X, Y; |
| mbedtls_mpi_init(&X); mbedtls_mpi_init(&Y); |
| |
| MBEDTLS_MPI_CHK(mbedtls_ecp_export(ecp, &grp, |
| (has_private ? &D : NULL), |
| &pt)); |
| |
| unsigned char point_bin[MBEDTLS_ECP_MAX_PT_LEN]; |
| size_t len = 0; |
| MBEDTLS_MPI_CHK(mbedtls_ecp_point_write_binary( |
| &grp, &pt, MBEDTLS_ECP_PF_UNCOMPRESSED, |
| &len, point_bin, sizeof(point_bin))); |
| switch (mbedtls_ecp_get_type(&grp)) { |
| case MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS: |
| if ((len & 1) == 0 || point_bin[0] != 0x04) { |
| /* Point in an unxepected format. This shouldn't happen. */ |
| ret = -1; |
| goto cleanup; |
| } |
| MBEDTLS_MPI_CHK( |
| mbedtls_mpi_read_binary(&X, point_bin + 1, len / 2)); |
| MBEDTLS_MPI_CHK( |
| mbedtls_mpi_read_binary(&Y, point_bin + 1 + len / 2, len / 2)); |
| mbedtls_mpi_write_file("X_Q: ", &X, 16, NULL); |
| mbedtls_mpi_write_file("Y_Q: ", &Y, 16, NULL); |
| break; |
| case MBEDTLS_ECP_TYPE_MONTGOMERY: |
| MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&X, point_bin, len)); |
| mbedtls_mpi_write_file("X_Q: ", &X, 16, NULL); |
| break; |
| default: |
| mbedtls_printf( |
| "This program does not yet support listing coordinates for this curve type.\n"); |
| break; |
| } |
| |
| if (has_private) { |
| mbedtls_mpi_write_file("D: ", &D, 16, NULL); |
| } |
| |
| cleanup: |
| mbedtls_ecp_group_free(&grp); |
| mbedtls_mpi_free(&D); |
| mbedtls_ecp_point_free(&pt); |
| mbedtls_mpi_free(&X); mbedtls_mpi_free(&Y); |
| return ret; |
| } |
| #endif |
| |
| int main(int argc, char *argv[]) |
| { |
| int ret = 1; |
| int exit_code = MBEDTLS_EXIT_FAILURE; |
| #if defined(MBEDTLS_ERROR_C) |
| char buf[200]; |
| #endif |
| int i; |
| char *p, *q; |
| |
| const char *pers = "pkey/key_app"; |
| mbedtls_entropy_context entropy; |
| mbedtls_ctr_drbg_context ctr_drbg; |
| |
| mbedtls_pk_context key; |
| #if defined(MBEDTLS_RSA_C) |
| mbedtls_mpi N, P, Q, D, E, DP, DQ, QP; |
| #endif /* MBEDTLS_RSA_C */ |
| |
| /* |
| * Set to sane values |
| */ |
| mbedtls_entropy_init(&entropy); |
| mbedtls_ctr_drbg_init(&ctr_drbg); |
| |
| mbedtls_pk_init(&key); |
| #if defined(MBEDTLS_ERROR_C) |
| memset(buf, 0, sizeof(buf)); |
| #endif |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| psa_status_t status = psa_crypto_init(); |
| if (status != PSA_SUCCESS) { |
| mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n", |
| (int) status); |
| goto exit; |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_RSA_C) |
| mbedtls_mpi_init(&N); mbedtls_mpi_init(&P); mbedtls_mpi_init(&Q); |
| mbedtls_mpi_init(&D); mbedtls_mpi_init(&E); mbedtls_mpi_init(&DP); |
| mbedtls_mpi_init(&DQ); mbedtls_mpi_init(&QP); |
| #endif /* MBEDTLS_RSA_C */ |
| |
| if (argc < 2) { |
| usage: |
| mbedtls_printf(USAGE); |
| goto exit; |
| } |
| |
| opt.mode = DFL_MODE; |
| opt.filename = DFL_FILENAME; |
| opt.output_mode = DFL_OUTPUT_MODE; |
| opt.output_file = DFL_OUTPUT_FILENAME; |
| opt.output_format = DFL_OUTPUT_FORMAT; |
| |
| for (i = 1; i < argc; i++) { |
| p = argv[i]; |
| if ((q = strchr(p, '=')) == NULL) { |
| goto usage; |
| } |
| *q++ = '\0'; |
| |
| if (strcmp(p, "mode") == 0) { |
| if (strcmp(q, "private") == 0) { |
| opt.mode = MODE_PRIVATE; |
| } else if (strcmp(q, "public") == 0) { |
| opt.mode = MODE_PUBLIC; |
| } else { |
| goto usage; |
| } |
| } else if (strcmp(p, "output_mode") == 0) { |
| if (strcmp(q, "private") == 0) { |
| opt.output_mode = OUTPUT_MODE_PRIVATE; |
| } else if (strcmp(q, "public") == 0) { |
| opt.output_mode = OUTPUT_MODE_PUBLIC; |
| } else { |
| goto usage; |
| } |
| } else if (strcmp(p, "output_format") == 0) { |
| #if defined(MBEDTLS_PEM_WRITE_C) |
| if (strcmp(q, "pem") == 0) { |
| opt.output_format = OUTPUT_FORMAT_PEM; |
| } else |
| #endif |
| if (strcmp(q, "der") == 0) { |
| opt.output_format = OUTPUT_FORMAT_DER; |
| } else { |
| goto usage; |
| } |
| } else if (strcmp(p, "filename") == 0) { |
| opt.filename = q; |
| } else if (strcmp(p, "output_file") == 0) { |
| opt.output_file = q; |
| } else { |
| goto usage; |
| } |
| } |
| |
| if (opt.mode == MODE_NONE && opt.output_mode != OUTPUT_MODE_NONE) { |
| mbedtls_printf("\nCannot output a key without reading one.\n"); |
| goto exit; |
| } |
| |
| if (opt.mode == MODE_PUBLIC && opt.output_mode == OUTPUT_MODE_PRIVATE) { |
| mbedtls_printf("\nCannot output a private key from a public key.\n"); |
| goto exit; |
| } |
| |
| if (opt.mode == MODE_PRIVATE) { |
| /* |
| * 1.1. Load the key |
| */ |
| mbedtls_printf("\n . Loading the private key ..."); |
| fflush(stdout); |
| |
| if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, |
| (const unsigned char *) pers, |
| strlen(pers))) != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n", |
| (unsigned int) -ret); |
| goto exit; |
| } |
| |
| ret = mbedtls_pk_parse_keyfile(&key, opt.filename, NULL, |
| mbedtls_ctr_drbg_random, &ctr_drbg); |
| if (ret != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_pk_parse_keyfile returned -0x%04x", |
| (unsigned int) -ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| /* |
| * 1.2 Print the key |
| */ |
| mbedtls_printf(" . Key information ...\n"); |
| |
| #if defined(MBEDTLS_RSA_C) |
| if (mbedtls_pk_get_type(&key) == MBEDTLS_PK_RSA) { |
| mbedtls_rsa_context *rsa = mbedtls_pk_rsa(key); |
| |
| if ((ret = mbedtls_rsa_export(rsa, &N, &P, &Q, &D, &E)) != 0 || |
| (ret = mbedtls_rsa_export_crt(rsa, &DP, &DQ, &QP)) != 0) { |
| mbedtls_printf(" failed\n ! could not export RSA parameters\n\n"); |
| goto exit; |
| } |
| |
| mbedtls_mpi_write_file("N: ", &N, 16, NULL); |
| mbedtls_mpi_write_file("E: ", &E, 16, NULL); |
| mbedtls_mpi_write_file("D: ", &D, 16, NULL); |
| mbedtls_mpi_write_file("P: ", &P, 16, NULL); |
| mbedtls_mpi_write_file("Q: ", &Q, 16, NULL); |
| mbedtls_mpi_write_file("DP: ", &DP, 16, NULL); |
| mbedtls_mpi_write_file("DQ: ", &DQ, 16, NULL); |
| mbedtls_mpi_write_file("QP: ", &QP, 16, NULL); |
| } else |
| #endif |
| #if defined(MBEDTLS_ECP_C) |
| if (mbedtls_pk_get_type(&key) == MBEDTLS_PK_ECKEY) { |
| if (show_ecp_key(mbedtls_pk_ec(key), 1) != 0) { |
| mbedtls_printf(" failed\n ! could not export ECC parameters\n\n"); |
| goto exit; |
| } |
| } else |
| #endif |
| mbedtls_printf("key type not supported yet\n"); |
| |
| } else if (opt.mode == MODE_PUBLIC) { |
| /* |
| * 1.1. Load the key |
| */ |
| mbedtls_printf("\n . Loading the public key ..."); |
| fflush(stdout); |
| |
| ret = mbedtls_pk_parse_public_keyfile(&key, opt.filename); |
| |
| if (ret != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_pk_parse_public_key returned -0x%04x", |
| (unsigned int) -ret); |
| goto exit; |
| } |
| |
| mbedtls_printf(" ok\n"); |
| |
| /* |
| * 1.2 Print the key |
| */ |
| mbedtls_printf(" . Key information ...\n"); |
| |
| #if defined(MBEDTLS_RSA_C) |
| if (mbedtls_pk_get_type(&key) == MBEDTLS_PK_RSA) { |
| mbedtls_rsa_context *rsa = mbedtls_pk_rsa(key); |
| |
| if ((ret = mbedtls_rsa_export(rsa, &N, NULL, NULL, |
| NULL, &E)) != 0) { |
| mbedtls_printf(" failed\n ! could not export RSA parameters\n\n"); |
| goto exit; |
| } |
| mbedtls_mpi_write_file("N: ", &N, 16, NULL); |
| mbedtls_mpi_write_file("E: ", &E, 16, NULL); |
| } else |
| #endif |
| #if defined(MBEDTLS_ECP_C) |
| if (mbedtls_pk_get_type(&key) == MBEDTLS_PK_ECKEY) { |
| if (show_ecp_key(mbedtls_pk_ec(key), 0) != 0) { |
| mbedtls_printf(" failed\n ! could not export ECC parameters\n\n"); |
| goto exit; |
| } |
| } else |
| #endif |
| mbedtls_printf("key type not supported yet\n"); |
| } else { |
| goto usage; |
| } |
| |
| if (opt.output_mode == OUTPUT_MODE_PUBLIC) { |
| write_public_key(&key, opt.output_file); |
| } |
| if (opt.output_mode == OUTPUT_MODE_PRIVATE) { |
| write_private_key(&key, opt.output_file); |
| } |
| |
| exit_code = MBEDTLS_EXIT_SUCCESS; |
| |
| exit: |
| |
| if (exit_code != MBEDTLS_EXIT_SUCCESS) { |
| #ifdef MBEDTLS_ERROR_C |
| mbedtls_strerror(ret, buf, sizeof(buf)); |
| mbedtls_printf(" - %s\n", buf); |
| #else |
| mbedtls_printf("\n"); |
| #endif |
| } |
| |
| #if defined(MBEDTLS_RSA_C) |
| mbedtls_mpi_free(&N); mbedtls_mpi_free(&P); mbedtls_mpi_free(&Q); |
| mbedtls_mpi_free(&D); mbedtls_mpi_free(&E); mbedtls_mpi_free(&DP); |
| mbedtls_mpi_free(&DQ); mbedtls_mpi_free(&QP); |
| #endif /* MBEDTLS_RSA_C */ |
| |
| mbedtls_pk_free(&key); |
| |
| mbedtls_ctr_drbg_free(&ctr_drbg); |
| mbedtls_entropy_free(&entropy); |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| mbedtls_psa_crypto_free(); |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| mbedtls_exit(exit_code); |
| } |
| #endif /* program viability conditions */ |