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Add 'md' cmd line parameter to cert_req example program

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This commit adds a command line option `md` to the example application
`programs/x509/cert_req` allowing to specify the hash algorithm to use
when signing the CSR.
This commit is contained in:
Hanno Becker 2018-10-08 17:14:42 +01:00
parent 1624e2e8bb
commit f745733bb1
1 changed files with 58 additions and 1 deletions
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59
programs/x509/cert_req.c
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@ -61,6 +61,7 @@ int main( void )
#define DFL_SUBJECT_NAME "CN=Cert,O=mbed TLS,C=UK"
#define DFL_KEY_USAGE 0
#define DFL_NS_CERT_TYPE 0
#define DFL_MD_ALG MBEDTLS_MD_SHA256
#define USAGE \
"\n usage: cert_req param=<>...\n" \
@ -87,6 +88,11 @@ int main( void )
" ssl_ca\n" \
" email_ca\n" \
" object_signing_ca\n" \
" md=%%s default: SHA256\n" \
" possible values:\n" \
" MD4, MD5, SHA1\n" \
" SHA224, SHA256\n" \
" SHA384, SHA512\n" \
"\n"
/*
@ -100,6 +106,7 @@ struct options
const char *subject_name; /* subject name for certificate request */
unsigned char key_usage; /* key usage flags */
unsigned char ns_cert_type; /* NS cert type */
mbedtls_md_type_t md_alg; /* Hash algorithm used for signature. */
} opt;
int write_certificate_request( mbedtls_x509write_csr *req, const char *output_file,
@ -147,7 +154,6 @@ int main( int argc, char *argv[] )
* Set to sane values
*/
mbedtls_x509write_csr_init( &req );
mbedtls_x509write_csr_set_md_alg( &req, MBEDTLS_MD_SHA256 );
mbedtls_pk_init( &key );
mbedtls_ctr_drbg_init( &ctr_drbg );
memset( buf, 0, sizeof( buf ) );
@ -166,6 +172,7 @@ int main( int argc, char *argv[] )
opt.subject_name = DFL_SUBJECT_NAME;
opt.key_usage = DFL_KEY_USAGE;
opt.ns_cert_type = DFL_NS_CERT_TYPE;
opt.md_alg = DFL_MD_ALG;
for( i = 1; i < argc; i++ )
{
@ -189,6 +196,54 @@ int main( int argc, char *argv[] )
{
opt.subject_name = q;
}
else if( strcmp( p, "md" ) == 0 )
{
if( strcmp( q, "SHA256" ) == 0 )
{
opt.md_alg = MBEDTLS_MD_SHA256;
}
else if( strcmp( q, "SHA224" ) == 0 )
{
opt.md_alg = MBEDTLS_MD_SHA224;
}
else
#if defined(MBEDTLS_MD5_C)
if( strcmp( q, "MD5" ) == 0 )
{
opt.md_alg = MBEDTLS_MD_MD5;
}
else
#endif /* MBEDTLS_MD5_C */
#if defined(MBEDTLS_MD4_C)
if( strcmp( q, "MD4" ) == 0 )
{
opt.md_alg = MBEDTLS_MD_MD4;
}
else
#endif /* MBEDTLS_MD5_C */
#if defined(MBEDTLS_SHA1_C)
if( strcmp( q, "SHA1" ) == 0 )
{
opt.md_alg = MBEDTLS_MD_SHA1;
}
else
#endif /* MBEDTLS_SHA1_C */
#if defined(MBEDTLS_SHA512_C)
if( strcmp( q, "SHA384" ) == 0 )
{
opt.md_alg = MBEDTLS_MD_SHA384;
}
else
if( strcmp( q, "SHA512" ) == 0 )
{
opt.md_alg = MBEDTLS_MD_SHA512;
}
else
#endif /* MBEDTLS_SHA512_C */
{
goto usage;
}
}
else if( strcmp( p, "key_usage" ) == 0 )
{
while( q != NULL )
@ -247,6 +302,8 @@ int main( int argc, char *argv[] )
goto usage;
}
mbedtls_x509write_csr_set_md_alg( &req, opt.md_alg );
if( opt.key_usage )
mbedtls_x509write_csr_set_key_usage( &req, opt.key_usage );