| /* |
| * RSASSA-PSS/SHA-256 signature verification program |
| * |
| * 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" |
| /* md.h is included this early since MD_CAN_XXX macros are defined there. */ |
| #include "mbedtls/md.h" |
| |
| #if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_ENTROPY_C) || \ |
| !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_MD_CAN_SHA256) || \ |
| !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) || \ |
| !defined(MBEDTLS_CTR_DRBG_C) |
| int main(void) |
| { |
| mbedtls_printf("MBEDTLS_MD_C and/or MBEDTLS_ENTROPY_C and/or " |
| "MBEDTLS_RSA_C and/or MBEDTLS_MD_CAN_SHA256 and/or " |
| "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or " |
| "MBEDTLS_CTR_DRBG_C not defined.\n"); |
| mbedtls_exit(0); |
| } |
| #else |
| |
| #include "mbedtls/md.h" |
| #include "mbedtls/pem.h" |
| #include "mbedtls/pk.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| |
| int main(int argc, char *argv[]) |
| { |
| FILE *f; |
| int ret = 1; |
| int exit_code = MBEDTLS_EXIT_FAILURE; |
| size_t i; |
| mbedtls_pk_context pk; |
| unsigned char hash[32]; |
| unsigned char buf[MBEDTLS_MPI_MAX_SIZE]; |
| char filename[512]; |
| |
| mbedtls_pk_init(&pk); |
| |
| #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 (argc != 3) { |
| mbedtls_printf("usage: rsa_verify_pss <key_file> <filename>\n"); |
| |
| #if defined(_WIN32) |
| mbedtls_printf("\n"); |
| #endif |
| |
| goto exit; |
| } |
| |
| mbedtls_printf("\n . Reading public key from '%s'", argv[1]); |
| fflush(stdout); |
| |
| if ((ret = mbedtls_pk_parse_public_keyfile(&pk, argv[1])) != 0) { |
| mbedtls_printf(" failed\n ! Could not read key from '%s'\n", argv[1]); |
| mbedtls_printf(" ! mbedtls_pk_parse_public_keyfile returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| if (!mbedtls_pk_can_do(&pk, MBEDTLS_PK_RSA)) { |
| mbedtls_printf(" failed\n ! Key is not an RSA key\n"); |
| goto exit; |
| } |
| |
| if ((ret = mbedtls_rsa_set_padding(mbedtls_pk_rsa(pk), |
| MBEDTLS_RSA_PKCS_V21, |
| MBEDTLS_MD_SHA256)) != 0) { |
| mbedtls_printf(" failed\n ! Invalid padding\n"); |
| goto exit; |
| } |
| |
| /* |
| * Extract the RSA signature from the file |
| */ |
| mbedtls_snprintf(filename, 512, "%s.sig", argv[2]); |
| |
| if ((f = fopen(filename, "rb")) == NULL) { |
| mbedtls_printf("\n ! Could not open %s\n\n", filename); |
| goto exit; |
| } |
| |
| i = fread(buf, 1, MBEDTLS_MPI_MAX_SIZE, f); |
| |
| fclose(f); |
| |
| /* |
| * Compute the SHA-256 hash of the input file and |
| * verify the signature |
| */ |
| mbedtls_printf("\n . Verifying the RSA/SHA-256 signature"); |
| fflush(stdout); |
| |
| if ((ret = mbedtls_md_file( |
| mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), |
| argv[2], hash)) != 0) { |
| mbedtls_printf(" failed\n ! Could not open or read %s\n\n", argv[2]); |
| goto exit; |
| } |
| |
| if ((ret = mbedtls_pk_verify(&pk, MBEDTLS_MD_SHA256, hash, 0, |
| buf, i)) != 0) { |
| mbedtls_printf(" failed\n ! mbedtls_pk_verify returned %d\n\n", ret); |
| goto exit; |
| } |
| |
| mbedtls_printf("\n . OK (the signature is valid)\n\n"); |
| |
| exit_code = MBEDTLS_EXIT_SUCCESS; |
| |
| exit: |
| mbedtls_pk_free(&pk); |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| mbedtls_psa_crypto_free(); |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| mbedtls_exit(exit_code); |
| } |
| #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_MD_CAN_SHA256 && |
| MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO */ |