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Factor common code for printing sig_alg

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Manuel Pégourié-Gonnard 2014-01-25 11:50:59 +01:00
parent cf975a3857
commit cac31eed9e
5 changed files with 66 additions and 84 deletions
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46
library/x509.c
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@ -815,6 +815,52 @@ int x509_serial_gets( char *buf, size_t size, const x509_buf *serial )
return( (int) ( size - n ) );
}
/*
* Helper for writing signature alrogithms
*/
int x509_sig_alg_gets( char *buf, size_t size, const x509_buf *sig_oid,
pk_type_t pk_alg, const x509_buf *sig_params )
{
int ret;
char *p = buf;
size_t n = size;
const char *desc = NULL;
ret = oid_get_sig_alg_desc( sig_oid, &desc );
if( ret != 0 )
ret = snprintf( p, n, "???" );
else
ret = snprintf( p, n, "%s", desc );
SAFE_SNPRINTF();
#if defined(POLARSSL_RSASSA_PSS_CERTIFICATES)
if( pk_alg == POLARSSL_PK_RSASSA_PSS )
{
md_type_t md_alg, mgf_md;
const md_info_t *md_info, *mgf_md_info;
int salt_len, trailer_field;
if( ( ret = x509_get_rsassa_pss_params( sig_params,
&md_alg, &mgf_md, &salt_len, &trailer_field ) ) != 0 )
return( ret );
md_info = md_info_from_type( md_alg );
mgf_md_info = md_info_from_type( mgf_md );
ret = snprintf( p, n, " (%s, MGF1-%s, 0x%02X, %d)",
md_info ? md_info->name : "???",
mgf_md_info ? mgf_md_info->name : "???",
salt_len, trailer_field );
SAFE_SNPRINTF();
}
#else
((void) pk_alg);
((void) sig_params);
#endif /* POLARSSL_RSASSA_PSS_CERTIFICATES */
return( (int) size - n );
}
/*
* Helper for writing "RSA key size", "EC key size", etc
*/