278 lines
8.6 KiB
C
278 lines
8.6 KiB
C
/**
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* \file x509_csr.h
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*
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* \brief X.509 certificate signing request parsing and writing
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*
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef POLARSSL_X509_CSR_H
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#define POLARSSL_X509_CSR_H
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#include "config.h"
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#include "x509.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \addtogroup x509_module
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* \{ */
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/**
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* \name Structures and functions for X.509 Certificate Signing Requests (CSR)
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* \{
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*/
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/**
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* Certificate Signing Request (CSR) structure.
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*/
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typedef struct _x509_csr
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{
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x509_buf raw; /**< The raw CSR data (DER). */
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x509_buf cri; /**< The raw CertificateRequestInfo body (DER). */
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int version;
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x509_buf subject_raw; /**< The raw subject data (DER). */
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x509_name subject; /**< The parsed subject data (named information object). */
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pk_context pk; /**< Container for the public key context. */
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x509_buf sig_oid;
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x509_buf sig;
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md_type_t sig_md; /**< Internal representation of the MD algorithm of the signature algorithm, e.g. POLARSSL_MD_SHA256 */
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pk_type_t sig_pk /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. POLARSSL_PK_RSA */;
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}
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x509_csr;
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/**
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* Container for writing a CSR
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*/
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typedef struct _x509write_csr
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{
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pk_context *key;
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asn1_named_data *subject;
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md_type_t md_alg;
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asn1_named_data *extensions;
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}
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x509write_csr;
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#if defined(POLARSSL_X509_CSR_PARSE_C)
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/**
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* \brief Load a Certificate Signing Request (CSR)
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*
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* \param csr CSR context to fill
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* \param buf buffer holding the CRL data
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* \param buflen size of the buffer
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*
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* \return 0 if successful, or a specific X509 or PEM error code
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*/
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int x509_csr_parse( x509_csr *csr, const unsigned char *buf, size_t buflen );
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#if defined(POLARSSL_FS_IO)
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/**
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* \brief Load a Certificate Signing Request (CSR)
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*
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* \param csr CSR context to fill
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* \param path filename to read the CSR from
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*
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* \return 0 if successful, or a specific X509 or PEM error code
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*/
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int x509_csr_parse_file( x509_csr *csr, const char *path );
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#endif /* POLARSSL_FS_IO */
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/**
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* \brief Returns an informational string about the
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* CSR.
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*
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* \param buf Buffer to write to
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* \param size Maximum size of buffer
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* \param prefix A line prefix
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* \param csr The X509 CSR to represent
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*
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* \return The amount of data written to the buffer, or -1 in
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* case of an error.
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*/
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int x509_csr_info( char *buf, size_t size, const char *prefix,
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const x509_csr *csr );
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/**
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* \brief Initialize a CSR
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*
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* \param csr CSR to initialize
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*/
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void x509_csr_init( x509_csr *csr );
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/**
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* \brief Unallocate all CSR data
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*
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* \param csr CSR to free
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*/
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void x509_csr_free( x509_csr *csr );
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#endif /* POLARSSL_X509_CSR_PARSE_C */
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/* \} name */
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/* \} addtogroup x509_module */
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#if defined(POLARSSL_X509_CSR_WRITE_C)
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/**
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* \brief Initialize a CSR context
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*
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* \param ctx CSR context to initialize
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*/
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void x509write_csr_init( x509write_csr *ctx );
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/**
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* \brief Set the subject name for a CSR
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* Subject names should contain a comma-separated list
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* of OID types and values:
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* e.g. "C=NL,O=Offspark,CN=PolarSSL Server 1"
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*
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* \param ctx CSR context to use
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* \param subject_name subject name to set
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*
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* \return 0 if subject name was parsed successfully, or
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* a specific error code
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*/
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int x509write_csr_set_subject_name( x509write_csr *ctx,
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const char *subject_name );
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/**
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* \brief Set the key for a CSR (public key will be included,
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* private key used to sign the CSR when writing it)
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*
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* \param ctx CSR context to use
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* \param key Asymetric key to include
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*/
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void x509write_csr_set_key( x509write_csr *ctx, pk_context *key );
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/**
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* \brief Set the MD algorithm to use for the signature
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* (e.g. POLARSSL_MD_SHA1)
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*
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* \param ctx CSR context to use
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* \param md_alg MD algorithm to use
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*/
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void x509write_csr_set_md_alg( x509write_csr *ctx, md_type_t md_alg );
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/**
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* \brief Set the Key Usage Extension flags
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* (e.g. KU_DIGITAL_SIGNATURE | KU_KEY_CERT_SIGN)
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*
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* \param ctx CSR context to use
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* \param key_usage key usage flags to set
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*
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* \return 0 if successful, or POLARSSL_ERR_X509WRITE_MALLOC_FAILED
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*/
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int x509write_csr_set_key_usage( x509write_csr *ctx, unsigned char key_usage );
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/**
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* \brief Set the Netscape Cert Type flags
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* (e.g. NS_CERT_TYPE_SSL_CLIENT | NS_CERT_TYPE_EMAIL)
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*
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* \param ctx CSR context to use
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* \param ns_cert_type Netscape Cert Type flags to set
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*
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* \return 0 if successful, or POLARSSL_ERR_X509WRITE_MALLOC_FAILED
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*/
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int x509write_csr_set_ns_cert_type( x509write_csr *ctx,
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unsigned char ns_cert_type );
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/**
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* \brief Generic function to add to or replace an extension in the CSR
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*
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* \param ctx CSR context to use
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* \param oid OID of the extension
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* \param oid_len length of the OID
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* \param val value of the extension OCTET STRING
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* \param val_len length of the value data
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*
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* \return 0 if successful, or a POLARSSL_ERR_X509WRITE_MALLOC_FAILED
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*/
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int x509write_csr_set_extension( x509write_csr *ctx,
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const char *oid, size_t oid_len,
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const unsigned char *val, size_t val_len );
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/**
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* \brief Free the contents of a CSR context
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*
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* \param ctx CSR context to free
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*/
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void x509write_csr_free( x509write_csr *ctx );
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/**
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* \brief Write a CSR (Certificate Signing Request) to a
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* DER structure
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* Note: data is written at the end of the buffer! Use the
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* return value to determine where you should start
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* using the buffer
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*
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* \param ctx CSR to write away
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* \param buf buffer to write to
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* \param size size of the buffer
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* \param f_rng RNG function (for signature, see note)
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* \param p_rng RNG parameter
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*
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* \return length of data written if successful, or a specific
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* error code
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*
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* \note f_rng may be NULL if RSA is used for signature and the
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* signature is made offline (otherwise f_rng is desirable
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* for countermeasures against timing attacks).
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* ECDSA signatures always require a non-NULL f_rng.
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*/
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int x509write_csr_der( x509write_csr *ctx, unsigned char *buf, size_t size,
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int (*f_rng)(void *, unsigned char *, size_t),
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void *p_rng );
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#if defined(POLARSSL_PEM_WRITE_C)
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/**
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* \brief Write a CSR (Certificate Signing Request) to a
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* PEM string
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*
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* \param ctx CSR to write away
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* \param buf buffer to write to
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* \param size size of the buffer
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* \param f_rng RNG function (for signature, see note)
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* \param p_rng RNG parameter
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*
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* \return 0 successful, or a specific error code
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*
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* \note f_rng may be NULL if RSA is used for signature and the
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* signature is made offline (otherwise f_rng is desirable
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* for couermeasures against timing attacks).
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* ECDSA signatures always require a non-NULL f_rng.
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*/
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int x509write_csr_pem( x509write_csr *ctx, unsigned char *buf, size_t size,
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int (*f_rng)(void *, unsigned char *, size_t),
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void *p_rng );
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#endif /* POLARSSL_PEM_WRITE_C */
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#endif /* POLARSSL_X509_CSR_WRITE_C */
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#ifdef __cplusplus
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}
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#endif
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#endif /* x509_csr.h */
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