477 lines
16 KiB
C
477 lines
16 KiB
C
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#include "ca.h"
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#define DFL_ISSUER_CRT "/spiffs/CA.crt"
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#define DFL_REQUEST_FILE "/spiffs/cert.req"
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#define DFL_SUBJECT_KEY "subject.key"
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#define DFL_ISSUER_KEY "/spiffs/keyfile.key"
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#define DFL_SUBJECT_PWD ""
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#define DFL_ISSUER_PWD ""
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#define DFL_OUTPUT_FILENAME "/spiffs/cert.crt"
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#define DFL_SUBJECT_NAME "CN=Cert,O=mbed TLS,C=UK"
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#define DFL_ISSUER_NAME "CN=CA,O=mbed TLS,C=UK"
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#define DFL_NOT_BEFORE "20010101000000"
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#define DFL_NOT_AFTER "20301231235959"
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#define DFL_SERIAL "1"
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#define DFL_SELFSIGN 0
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#define DFL_IS_CA 0
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#define DFL_MAX_PATHLEN -1
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#define DFL_KEY_USAGE 0
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#define DFL_NS_CERT_TYPE 0
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#define DFL_VERSION 3
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#define DFL_AUTH_IDENT 1
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#define DFL_SUBJ_IDENT 1
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#define DFL_CONSTRAINTS 1
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#define DFL_DIGEST MBEDTLS_MD_SHA256
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struct options
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{
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const char *issuer_crt; /* filename of the issuer certificate */
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const char *request_file; /* filename of the certificate request */
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const char *subject_key; /* filename of the subject key file */
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const char *issuer_key; /* filename of the issuer key file */
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const char *subject_pwd; /* password for the subject key file */
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const char *issuer_pwd; /* password for the issuer key file */
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const char *output_file; /* where to store the constructed CRT */
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const char *subject_name; /* subject name for certificate */
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const char *issuer_name; /* issuer name for certificate */
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const char *not_before; /* validity period not before */
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const char *not_after; /* validity period not after */
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const char *serial; /* serial number string */
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int selfsign; /* selfsign the certificate */
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int is_ca; /* is a CA certificate */
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int max_pathlen; /* maximum CA path length */
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int authority_identifier; /* add authority identifier to CRT */
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int subject_identifier; /* add subject identifier to CRT */
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int basic_constraints; /* add basic constraints ext to CRT */
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int version; /* CRT version */
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mbedtls_md_type_t md; /* Hash used for signing */
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unsigned char key_usage; /* key usage flags */
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unsigned char ns_cert_type; /* NS cert type */
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} opt;
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void certifikat(void * pvParameters){
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int ret = 1;
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int exit_code = MBEDTLS_EXIT_FAILURE;
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mbedtls_x509_crt issuer_crt;
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mbedtls_pk_context loaded_issuer_key, loaded_subject_key;
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mbedtls_pk_context *issuer_key = &loaded_issuer_key,
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*subject_key = &loaded_subject_key;
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char *buf = calloc(1024,sizeof(char));
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char issuer_name[256] ;//= calloc(256,sizeof(char));
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// int i;
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// char *p, *q, *r;
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#if defined(MBEDTLS_X509_CSR_PARSE_C)
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char subject_name[256];// = calloc(256,sizeof(char));
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mbedtls_x509_csr csr;
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#endif
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mbedtls_x509write_cert crt;
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mbedtls_mpi serial;
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mbedtls_entropy_context entropy;
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mbedtls_ctr_drbg_context ctr_drbg;
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const char *pers = "crt example app";
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mbedtls_x509write_crt_init( &crt );
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mbedtls_pk_init( &loaded_issuer_key );
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mbedtls_pk_init( &loaded_subject_key );
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mbedtls_mpi_init( &serial );
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mbedtls_ctr_drbg_init( &ctr_drbg );
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mbedtls_entropy_init( &entropy );
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#if defined(MBEDTLS_X509_CSR_PARSE_C)
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mbedtls_x509_csr_init( &csr );
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#endif
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mbedtls_x509_crt_init( &issuer_crt );
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memset( buf, 0, 1024 );
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opt.issuer_crt = DFL_ISSUER_CRT;
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opt.request_file = DFL_REQUEST_FILE;
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opt.subject_key = DFL_SUBJECT_KEY;
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opt.issuer_key = DFL_ISSUER_KEY;
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opt.subject_pwd = DFL_SUBJECT_PWD;
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opt.issuer_pwd = DFL_ISSUER_PWD;
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opt.output_file = DFL_OUTPUT_FILENAME;
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opt.subject_name = DFL_SUBJECT_NAME;
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opt.issuer_name = DFL_ISSUER_NAME;
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opt.not_before = DFL_NOT_BEFORE;
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opt.not_after = DFL_NOT_AFTER;
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opt.serial = DFL_SERIAL;
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opt.selfsign = DFL_SELFSIGN;
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opt.is_ca = DFL_IS_CA;
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opt.max_pathlen = DFL_MAX_PATHLEN;
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opt.key_usage = DFL_KEY_USAGE;
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opt.ns_cert_type = DFL_NS_CERT_TYPE;
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opt.version = DFL_VERSION - 1;
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opt.md = DFL_DIGEST;
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opt.subject_identifier = DFL_SUBJ_IDENT;
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opt.authority_identifier = DFL_AUTH_IDENT;
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opt.basic_constraints = DFL_CONSTRAINTS;
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/*
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* 0. Seed the PRNG
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*/
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mbedtls_printf( " . 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, &entropy,
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(const unsigned char *) pers,
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strlen( pers ) ) ) != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d - %s\n",
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ret, buf );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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// Parse serial to MPI
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//
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mbedtls_printf( " . Reading serial number..." );
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fflush( stdout );
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if( ( ret = mbedtls_mpi_read_string( &serial, 10, opt.serial ) ) != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_mpi_read_string "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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// Parse issuer certificate if present
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//
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if( !opt.selfsign && strlen( opt.issuer_crt ) )
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{
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/*
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* 1.0.a. Load the certificates
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*/
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mbedtls_printf( " . Loading the issuer certificate ..." );
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fflush( stdout );
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if( ( ret = mbedtls_x509_crt_parse_file( &issuer_crt, opt.issuer_crt ) ) != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse_file "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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ret = mbedtls_x509_dn_gets( issuer_name, sizeof(issuer_name),
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&issuer_crt.subject );
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if( ret < 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_x509_dn_gets "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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opt.issuer_name = issuer_name;
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mbedtls_printf( " ok\n" );
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}
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#if defined(MBEDTLS_X509_CSR_PARSE_C)
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// Parse certificate request if present
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//
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if( !opt.selfsign && strlen( opt.request_file ) )
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{
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/*
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* 1.0.b. Load the CSR
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*/
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mbedtls_printf( " . Loading the certificate request ..." );
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fflush( stdout );
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if( ( ret = mbedtls_x509_csr_parse_file( &csr, opt.request_file ) ) != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_x509_csr_parse_file "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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ret = mbedtls_x509_dn_gets( subject_name, sizeof(subject_name),
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&csr.subject );
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if( ret < 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_x509_dn_gets "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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opt.subject_name = subject_name;
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subject_key = &csr.pk;
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mbedtls_printf( " ok\n" );
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}
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#endif /* MBEDTLS_X509_CSR_PARSE_C */
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/*
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* 1.1. Load the keys
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*/
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if( !opt.selfsign && !strlen( opt.request_file ) )
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{
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mbedtls_printf( " . Loading the subject key ..." );
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fflush( stdout );
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ret = mbedtls_pk_parse_keyfile( &loaded_subject_key, opt.subject_key,
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opt.subject_pwd );
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if( ret != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_pk_parse_keyfile "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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}
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mbedtls_printf( " . Loading the issuer key ..." );
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fflush( stdout );
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ret = mbedtls_pk_parse_keyfile( &loaded_issuer_key, opt.issuer_key,
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opt.issuer_pwd );
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if( ret != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_pk_parse_keyfile "
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"returned -x%02x - %s\n\n", -ret, buf );
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goto exit;
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}
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// Check if key and issuer certificate match
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//
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if( strlen( opt.issuer_crt ) )
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{
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if( mbedtls_pk_check_pair( &issuer_crt.pk, issuer_key ) != 0 )
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{
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mbedtls_printf( " failed\n ! issuer_key does not match "
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"issuer certificate\n\n" );
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goto exit;
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}
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}
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mbedtls_printf( " ok\n" );
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if( opt.selfsign )
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{
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opt.subject_name = opt.issuer_name;
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subject_key = issuer_key;
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}
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mbedtls_x509write_crt_set_subject_key( &crt, subject_key );
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mbedtls_x509write_crt_set_issuer_key( &crt, issuer_key );
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/*
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* 1.0. Check the names for validity
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*/
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if( ( ret = mbedtls_x509write_crt_set_subject_name( &crt, opt.subject_name ) ) != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_subject_name "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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if( ( ret = mbedtls_x509write_crt_set_issuer_name( &crt, opt.issuer_name ) ) != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_issuer_name "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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mbedtls_printf( " . Setting certificate values ..." );
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fflush( stdout );
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mbedtls_x509write_crt_set_version( &crt, opt.version );
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mbedtls_x509write_crt_set_md_alg( &crt, opt.md );
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ret = mbedtls_x509write_crt_set_serial( &crt, &serial );
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if( ret != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_serial "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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ret = mbedtls_x509write_crt_set_validity( &crt, opt.not_before, opt.not_after );
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if( ret != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_validity "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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if( opt.version == MBEDTLS_X509_CRT_VERSION_3 &&
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opt.basic_constraints != 0 )
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{
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mbedtls_printf( " . Adding the Basic Constraints extension ..." );
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fflush( stdout );
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ret = mbedtls_x509write_crt_set_basic_constraints( &crt, opt.is_ca,
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opt.max_pathlen );
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if( ret != 0 )
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{
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mbedtls_strerror( ret, buf, 1024 );
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mbedtls_printf( " failed\n ! x509write_crt_set_basic_contraints "
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"returned -0x%04x - %s\n\n", -ret, buf );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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}
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#if defined(MBEDTLS_SHA1_C)
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if( opt.version == MBEDTLS_X509_CRT_VERSION_3 &&
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opt.subject_identifier != 0 )
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{
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mbedtls_printf( " . Adding the Subject Key Identifier ..." );
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fflush( stdout );
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ret = mbedtls_x509write_crt_set_subject_key_identifier( &crt );
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if( ret != 0 )
|
||
|
|
{
|
||
|
|
mbedtls_strerror( ret, buf, 1024 );
|
||
|
|
mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_subject"
|
||
|
|
"_key_identifier returned -0x%04x - %s\n\n",
|
||
|
|
-ret, buf );
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
mbedtls_printf( " ok\n" );
|
||
|
|
}
|
||
|
|
|
||
|
|
if( opt.version == MBEDTLS_X509_CRT_VERSION_3 &&
|
||
|
|
opt.authority_identifier != 0 )
|
||
|
|
{
|
||
|
|
mbedtls_printf( " . Adding the Authority Key Identifier ..." );
|
||
|
|
fflush( stdout );
|
||
|
|
|
||
|
|
ret = mbedtls_x509write_crt_set_authority_key_identifier( &crt );
|
||
|
|
if( ret != 0 )
|
||
|
|
{
|
||
|
|
mbedtls_strerror( ret, buf, 1024 );
|
||
|
|
mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_authority_"
|
||
|
|
"key_identifier returned -0x%04x - %s\n\n",
|
||
|
|
-ret, buf );
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
mbedtls_printf( " ok\n" );
|
||
|
|
}
|
||
|
|
#endif /* MBEDTLS_SHA1_C */
|
||
|
|
|
||
|
|
if( opt.version == MBEDTLS_X509_CRT_VERSION_3 &&
|
||
|
|
opt.key_usage != 0 )
|
||
|
|
{
|
||
|
|
mbedtls_printf( " . Adding the Key Usage extension ..." );
|
||
|
|
fflush( stdout );
|
||
|
|
|
||
|
|
ret = mbedtls_x509write_crt_set_key_usage( &crt, opt.key_usage );
|
||
|
|
if( ret != 0 )
|
||
|
|
{
|
||
|
|
mbedtls_strerror( ret, buf, 1024 );
|
||
|
|
mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_key_usage "
|
||
|
|
"returned -0x%04x - %s\n\n", -ret, buf );
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
mbedtls_printf( " ok\n" );
|
||
|
|
}
|
||
|
|
|
||
|
|
if( opt.version == MBEDTLS_X509_CRT_VERSION_3 &&
|
||
|
|
opt.ns_cert_type != 0 )
|
||
|
|
{
|
||
|
|
mbedtls_printf( " . Adding the NS Cert Type extension ..." );
|
||
|
|
fflush( stdout );
|
||
|
|
|
||
|
|
ret = mbedtls_x509write_crt_set_ns_cert_type( &crt, opt.ns_cert_type );
|
||
|
|
if( ret != 0 )
|
||
|
|
{
|
||
|
|
mbedtls_strerror( ret, buf, 1024 );
|
||
|
|
mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_ns_cert_type "
|
||
|
|
"returned -0x%04x - %s\n\n", -ret, buf );
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
mbedtls_printf( " ok\n" );
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 1.2. Writing the certificate
|
||
|
|
*/
|
||
|
|
mbedtls_printf( " . Writing the certificate..." );
|
||
|
|
fflush( stdout );
|
||
|
|
|
||
|
|
unsigned char output_buf[4096];
|
||
|
|
memset( output_buf, 0, 4096 );
|
||
|
|
//////////////////////////////////////////////////////////
|
||
|
|
//ret = mbedtls_x509write_crt_pem( &crt, output_buf, 4096, mbedtls_ctr_drbg_random, &ctr_drbg );
|
||
|
|
if( ( ret = write_certificate( &crt, opt.output_file, mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
|
||
|
|
{
|
||
|
|
mbedtls_strerror( ret, buf, 1024 );
|
||
|
|
mbedtls_printf( " failed\n ! write_certificate -0x%04x - %s\n\n",
|
||
|
|
-ret, buf );
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
mbedtls_printf( " ok\n" );
|
||
|
|
|
||
|
|
exit_code = MBEDTLS_EXIT_SUCCESS;
|
||
|
|
|
||
|
|
exit:
|
||
|
|
#if defined(MBEDTLS_X509_CSR_PARSE_C)
|
||
|
|
mbedtls_x509_csr_free( &csr );
|
||
|
|
#endif /* MBEDTLS_X509_CSR_PARSE_C */
|
||
|
|
mbedtls_x509_crt_free( &issuer_crt );
|
||
|
|
mbedtls_x509write_crt_free( &crt );
|
||
|
|
mbedtls_pk_free( &loaded_subject_key );
|
||
|
|
mbedtls_pk_free( &loaded_issuer_key );
|
||
|
|
mbedtls_mpi_free( &serial );
|
||
|
|
mbedtls_ctr_drbg_free( &ctr_drbg );
|
||
|
|
mbedtls_entropy_free( &entropy );
|
||
|
|
|
||
|
|
|
||
|
|
for(;;){
|
||
|
|
vTaskDelay(40);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
int write_certificate( mbedtls_x509write_cert *crt, const char *output_file,
|
||
|
|
int (*f_rng)(void *, unsigned char *, size_t),
|
||
|
|
void *p_rng )
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
FILE *f;
|
||
|
|
unsigned char output_buf[4096];
|
||
|
|
size_t len = 0;
|
||
|
|
|
||
|
|
memset( output_buf, 0, 4096 );
|
||
|
|
if( ( ret = mbedtls_x509write_crt_pem( crt, output_buf, 4096,
|
||
|
|
f_rng, p_rng ) ) < 0 )
|
||
|
|
return( ret );
|
||
|
|
|
||
|
|
len = strlen( (char *) output_buf );
|
||
|
|
|
||
|
|
if( ( f = fopen( output_file, "w" ) ) == NULL )
|
||
|
|
return( -1 );
|
||
|
|
|
||
|
|
if( fwrite( output_buf, 1, len, f ) != len )
|
||
|
|
{
|
||
|
|
fclose( f );
|
||
|
|
return( -1 );
|
||
|
|
}
|
||
|
|
|
||
|
|
fclose( f );
|
||
|
|
read_file("/spiffs/cert.crt");
|
||
|
|
return( 0 );
|
||
|
|
}
|