/*
* Parse a CSR in DER format
*/
int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
const unsigned char *buf, size_t buflen )
{
int ret;
size_t len;
unsigned char *p, *end;
mbedtls_x509_buf sig_params;
memset( &sig_params, 0, sizeof( mbedtls_x509_buf ) );
/*
* Check for valid input
*/
if( csr == NULL || buf == NULL )
return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedtls_x509_csr_init( csr );
/*
* first copy the raw DER data
*/
p = mbedtls_calloc( 1, len = buflen );
if( p == NULL )
return( MBEDTLS_ERR_X509_ALLOC_FAILED );
memcpy( p, buf, buflen );
csr->raw.p = p;
csr->raw.len = len;
end = p + len;
/*
* CertificationRequest ::= SEQUENCE {
* certificationRequestInfo CertificationRequestInfo,
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING
* }
*/
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT );
}
if( len != (size_t) ( end - p ) )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT +
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
}
/*
* CertificationRequestInfo ::= SEQUENCE {
*/
csr->cri.p = p;
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
}
end = p + len;
csr->cri.len = end - csr->cri.p;
/*
* Version ::= INTEGER { v1(0) }
*/
if( ( ret = x509_csr_get_version( &p, end, &csr->version ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
csr->version++;
if( csr->version != 1 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
}
/*
* subject Name
*/
csr->subject_raw.p = p;
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
}
if( ( ret = mbedtls_x509_get_name( &p, p + len, &csr->subject ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
csr->subject_raw.len = p - csr->subject_raw.p;
/*
* subjectPKInfo SubjectPublicKeyInfo
*/
if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &csr->pk ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
/*
* attributes [0] Attributes
*
* The list of possible attributes is open-ended, though RFC 2985
* (PKCS#9) defines a few in section 5.4. We currently don't support any,
* so we just ignore them. This is a safe thing to do as the worst thing
* that could happen is that we issue a certificate that does not match
* the requester's expectations - this cannot cause a violation of our
* signature policies.
*/
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
}
p += len;
end = csr->raw.p + csr->raw.len;
/*
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING
*/
if( ( ret = mbedtls_x509_get_alg( &p, end, &csr->sig_oid, &sig_params ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
if( ( ret = mbedtls_x509_get_sig_alg( &csr->sig_oid, &sig_params,
&csr->sig_md, &csr->sig_pk,
&csr->sig_opts ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
}
if( ( ret = mbedtls_x509_get_sig( &p, end, &csr->sig ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
if( p != end )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT +
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
}
return( 0 );
}
int main( int argc, char *argv[] )
{
int ret = 0;
mbedtls_x509_crt issuer_crt;
mbedtls_pk_context loaded_issuer_key, loaded_subject_key;
mbedtls_pk_context *issuer_key = &loaded_issuer_key,
*subject_key = &loaded_subject_key;
char buf[1024];
char issuer_name[128];
int i;
char *p, *q, *r;
#if defined(MBEDTLS_X509_CSR_PARSE_C)
char subject_name[128];
mbedtls_x509_csr csr;
#endif
mbedtls_x509write_cert crt;
mbedtls_mpi serial;
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
const char *pers = "crt example app";
/*
* Set to sane values
*/
mbedtls_x509write_crt_init( &crt );
mbedtls_x509write_crt_set_md_alg( &crt, MBEDTLS_MD_SHA256 );
mbedtls_pk_init( &loaded_issuer_key );
mbedtls_pk_init( &loaded_subject_key );
mbedtls_mpi_init( &serial );
mbedtls_ctr_drbg_init( &ctr_drbg );
#if defined(MBEDTLS_X509_CSR_PARSE_C)
mbedtls_x509_csr_init( &csr );
#endif
mbedtls_x509_crt_init( &issuer_crt );
memset( buf, 0, 1024 );
if( argc == 0 )
{
usage:
mbedtls_printf( USAGE );
ret = 1;
goto exit;
}
opt.issuer_crt = DFL_ISSUER_CRT;
opt.request_file = DFL_REQUEST_FILE;
opt.subject_key = DFL_SUBJECT_KEY;
opt.issuer_key = DFL_ISSUER_KEY;
opt.subject_pwd = DFL_SUBJECT_PWD;
opt.issuer_pwd = DFL_ISSUER_PWD;
opt.output_file = DFL_OUTPUT_FILENAME;
opt.subject_name = DFL_SUBJECT_NAME;
opt.issuer_name = DFL_ISSUER_NAME;
opt.not_before = DFL_NOT_BEFORE;
opt.not_after = DFL_NOT_AFTER;
opt.serial = DFL_SERIAL;
opt.selfsign = DFL_SELFSIGN;
opt.is_ca = DFL_IS_CA;
opt.max_pathlen = DFL_MAX_PATHLEN;
opt.key_usage = DFL_KEY_USAGE;
opt.ns_cert_type = DFL_NS_CERT_TYPE;
for( i = 1; i < argc; i++ )
{
p = argv[i];
if( ( q = strchr( p, '=' ) ) == NULL )
goto usage;
*q++ = '\0';
if( strcmp( p, "request_file" ) == 0 )
opt.request_file = q;
else if( strcmp( p, "subject_key" ) == 0 )
opt.subject_key = q;
else if( strcmp( p, "issuer_key" ) == 0 )
opt.issuer_key = q;
else if( strcmp( p, "subject_pwd" ) == 0 )
opt.subject_pwd = q;
else if( strcmp( p, "issuer_pwd" ) == 0 )
opt.issuer_pwd = q;
else if( strcmp( p, "issuer_crt" ) == 0 )
opt.issuer_crt = q;
else if( strcmp( p, "output_file" ) == 0 )
opt.output_file = q;
else if( strcmp( p, "subject_name" ) == 0 )
{
opt.subject_name = q;
}
else if( strcmp( p, "issuer_name" ) == 0 )
{
opt.issuer_name = q;
}
else if( strcmp( p, "not_before" ) == 0 )
{
opt.not_before = q;
}
else if( strcmp( p, "not_after" ) == 0 )
{
opt.not_after = q;
}
else if( strcmp( p, "serial" ) == 0 )
{
opt.serial = q;
}
else if( strcmp( p, "selfsign" ) == 0 )
{
opt.selfsign = atoi( q );
if( opt.selfsign < 0 || opt.selfsign > 1 )
goto usage;
}
else if( strcmp( p, "is_ca" ) == 0 )
{
opt.is_ca = atoi( q );
if( opt.is_ca < 0 || opt.is_ca > 1 )
goto usage;
}
else if( strcmp( p, "max_pathlen" ) == 0 )
{
opt.max_pathlen = atoi( q );
if( opt.max_pathlen < -1 || opt.max_pathlen > 127 )
goto usage;
}
else if( strcmp( p, "key_usage" ) == 0 )
{
while( q != NULL )
{
if( ( r = strchr( q, ',' ) ) != NULL )
*r++ = '\0';
if( strcmp( q, "digital_signature" ) == 0 )
opt.key_usage |= MBEDTLS_X509_KU_DIGITAL_SIGNATURE;
else if( strcmp( q, "non_repudiation" ) == 0 )
opt.key_usage |= MBEDTLS_X509_KU_NON_REPUDIATION;
else if( strcmp( q, "key_encipherment" ) == 0 )
opt.key_usage |= MBEDTLS_X509_KU_KEY_ENCIPHERMENT;
else if( strcmp( q, "data_encipherment" ) == 0 )
opt.key_usage |= MBEDTLS_X509_KU_DATA_ENCIPHERMENT;
else if( strcmp( q, "key_agreement" ) == 0 )
opt.key_usage |= MBEDTLS_X509_KU_KEY_AGREEMENT;
else if( strcmp( q, "key_cert_sign" ) == 0 )
opt.key_usage |= MBEDTLS_X509_KU_KEY_CERT_SIGN;
else if( strcmp( q, "crl_sign" ) == 0 )
opt.key_usage |= MBEDTLS_X509_KU_CRL_SIGN;
else
goto usage;
q = r;
}
}
else if( strcmp( p, "ns_cert_type" ) == 0 )
{
while( q != NULL )
{
if( ( r = strchr( q, ',' ) ) != NULL )
*r++ = '\0';
if( strcmp( q, "ssl_client" ) == 0 )
opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT;
else if( strcmp( q, "ssl_server" ) == 0 )
opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER;
else if( strcmp( q, "email" ) == 0 )
opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_EMAIL;
else if( strcmp( q, "object_signing" ) == 0 )
opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING;
else if( strcmp( q, "ssl_ca" ) == 0 )
opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_SSL_CA;
else if( strcmp( q, "email_ca" ) == 0 )
opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA;
else if( strcmp( q, "object_signing_ca" ) == 0 )
opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA;
else
goto usage;
q = r;
}
}
else
goto usage;
}
mbedtls_printf("\n");
/*
* 0. Seed the PRNG
*/
mbedtls_printf( " . Seeding the random number generator..." );
fflush( stdout );
mbedtls_entropy_init( &entropy );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d - %s\n", ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
// Parse serial to MPI
//
mbedtls_printf( " . Reading serial number..." );
fflush( stdout );
if( ( ret = mbedtls_mpi_read_string( &serial, 10, opt.serial ) ) != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_mpi_read_string returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
// Parse issuer certificate if present
//
if( !opt.selfsign && strlen( opt.issuer_crt ) )
{
/*
* 1.0.a. Load the certificates
*/
mbedtls_printf( " . Loading the issuer certificate ..." );
fflush( stdout );
if( ( ret = mbedtls_x509_crt_parse_file( &issuer_crt, opt.issuer_crt ) ) != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse_file returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
ret = mbedtls_x509_dn_gets( issuer_name, sizeof(issuer_name),
&issuer_crt.subject );
if( ret < 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_x509_dn_gets returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
opt.issuer_name = issuer_name;
mbedtls_printf( " ok\n" );
}
#if defined(MBEDTLS_X509_CSR_PARSE_C)
// Parse certificate request if present
//
if( !opt.selfsign && strlen( opt.request_file ) )
{
/*
* 1.0.b. Load the CSR
*/
mbedtls_printf( " . Loading the certificate request ..." );
fflush( stdout );
if( ( ret = mbedtls_x509_csr_parse_file( &csr, opt.request_file ) ) != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_x509_csr_parse_file returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
ret = mbedtls_x509_dn_gets( subject_name, sizeof(subject_name),
&csr.subject );
if( ret < 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_x509_dn_gets returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
opt.subject_name = subject_name;
subject_key = &csr.pk;
mbedtls_printf( " ok\n" );
}
#endif /* MBEDTLS_X509_CSR_PARSE_C */
/*
* 1.1. Load the keys
*/
if( !opt.selfsign && !strlen( opt.request_file ) )
{
mbedtls_printf( " . Loading the subject key ..." );
fflush( stdout );
ret = mbedtls_pk_parse_keyfile( &loaded_subject_key, opt.subject_key,
opt.subject_pwd );
if( ret != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_pk_parse_keyfile returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
}
mbedtls_printf( " . Loading the issuer key ..." );
fflush( stdout );
ret = mbedtls_pk_parse_keyfile( &loaded_issuer_key, opt.issuer_key,
opt.issuer_pwd );
if( ret != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_pk_parse_keyfile returned -x%02x - %s\n\n", -ret, buf );
goto exit;
}
// Check if key and issuer certificate match
//
if( strlen( opt.issuer_crt ) )
{
if( !mbedtls_pk_can_do( &issuer_crt.pk, MBEDTLS_PK_RSA ) ||
mbedtls_mpi_cmp_mpi( &mbedtls_pk_rsa( issuer_crt.pk )->N,
&mbedtls_pk_rsa( *issuer_key )->N ) != 0 ||
mbedtls_mpi_cmp_mpi( &mbedtls_pk_rsa( issuer_crt.pk )->E,
&mbedtls_pk_rsa( *issuer_key )->E ) != 0 )
{
mbedtls_printf( " failed\n ! issuer_key does not match issuer certificate\n\n" );
ret = -1;
goto exit;
}
}
mbedtls_printf( " ok\n" );
if( opt.selfsign )
{
opt.subject_name = opt.issuer_name;
subject_key = issuer_key;
}
mbedtls_x509write_crt_set_subject_key( &crt, subject_key );
mbedtls_x509write_crt_set_issuer_key( &crt, issuer_key );
/*
* 1.0. Check the names for validity
*/
if( ( ret = mbedtls_x509write_crt_set_subject_name( &crt, opt.subject_name ) ) != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_subject_name returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
if( ( ret = mbedtls_x509write_crt_set_issuer_name( &crt, opt.issuer_name ) ) != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_issuer_name returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " . Setting certificate values ..." );
fflush( stdout );
ret = mbedtls_x509write_crt_set_serial( &crt, &serial );
if( ret != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_serial returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
ret = mbedtls_x509write_crt_set_validity( &crt, opt.not_before, opt.not_after );
if( ret != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_validity returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
mbedtls_printf( " . Adding the Basic Constraints extension ..." );
fflush( stdout );
ret = mbedtls_x509write_crt_set_basic_constraints( &crt, opt.is_ca,
opt.max_pathlen );
if( ret != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! x509write_crt_set_basic_contraints returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
#if defined(MBEDTLS_SHA1_C)
mbedtls_printf( " . Adding the Subject Key Identifier ..." );
fflush( stdout );
ret = mbedtls_x509write_crt_set_subject_key_identifier( &crt );
if( ret != 0 )
{
mbedtls_strerror( ret, buf, 1024 );
mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_subject_key_identifier returned -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
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%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
#endif /* MBEDTLS_SHA1_C */
if( opt.key_usage )
{
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%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
}
if( opt.ns_cert_type )
{
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%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
}
/*
* 1.2. Writing the request
*/
mbedtls_printf( " . Writing the certificate..." );
fflush( stdout );
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_certifcate -0x%02x - %s\n\n", -ret, buf );
goto exit;
}
mbedtls_printf( " ok\n" );
exit:
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 );
#if defined(_WIN32)
mbedtls_printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}
/*
* Parse a CSR in DER format
*/
int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
const unsigned char *buf, size_t buflen )
{
int ret;
size_t len;
unsigned char *p, *end;
mbedtls_x509_buf sig_params;
memset( &sig_params, 0, sizeof( mbedtls_x509_buf ) );
/*
* Check for valid input
*/
if( csr == NULL || buf == NULL )
return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
mbedtls_x509_csr_init( csr );
/*
* first copy the raw DER data
*/
p = mbedtls_calloc( 1, len = buflen );
if( p == NULL )
return( MBEDTLS_ERR_X509_ALLOC_FAILED );
memcpy( p, buf, buflen );
csr->raw.p = p;
csr->raw.len = len;
end = p + len;
/*
* CertificationRequest ::= SEQUENCE {
* certificationRequestInfo CertificationRequestInfo,
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING
* }
*/
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT );
}
if( len != (size_t) ( end - p ) )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT +
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
}
/*
* CertificationRequestInfo ::= SEQUENCE {
*/
csr->cri.p = p;
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
}
end = p + len;
csr->cri.len = end - csr->cri.p;
/*
* Version ::= INTEGER { v1(0) }
*/
if( ( ret = x509_csr_get_version( &p, end, &csr->version ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
csr->version++;
if( csr->version != 1 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
}
/*
* subject Name
*/
csr->subject_raw.p = p;
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
}
if( ( ret = mbedtls_x509_get_name( &p, p + len, &csr->subject ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
csr->subject_raw.len = p - csr->subject_raw.p;
/*
* subjectPKInfo SubjectPublicKeyInfo
*/
if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &csr->pk ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
/*
* attributes [0] Attributes
*/
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
}
// TODO Parse Attributes / extension requests
p += len;
end = csr->raw.p + csr->raw.len;
/*
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING
*/
if( ( ret = mbedtls_x509_get_alg( &p, end, &csr->sig_oid, &sig_params ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
if( ( ret = mbedtls_x509_get_sig_alg( &csr->sig_oid, &sig_params,
&csr->sig_md, &csr->sig_pk,
&csr->sig_opts ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
}
if( ( ret = mbedtls_x509_get_sig( &p, end, &csr->sig ) ) != 0 )
{
mbedtls_x509_csr_free( csr );
return( ret );
}
if( p != end )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_INVALID_FORMAT +
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
}
return( 0 );
}
