/** * \file x509_csr.h * * \brief X.509 certificate signing request parsing and writing * * Copyright (C) 2006-2014, Brainspark B.V. * * This file is part of PolarSSL (http://www.polarssl.org) * Lead Maintainer: Paul Bakker * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef POLARSSL_X509_CSR_H #define POLARSSL_X509_CSR_H #if !defined(POLARSSL_CONFIG_FILE) #include "config.h" #else #include POLARSSL_CONFIG_FILE #endif #include "x509.h" #ifdef __cplusplus extern "C" { #endif /** * \addtogroup x509_module * \{ */ /** * \name Structures and functions for X.509 Certificate Signing Requests (CSR) * \{ */ /** * Certificate Signing Request (CSR) structure. */ typedef struct _x509_csr { x509_buf raw; /**< The raw CSR data (DER). */ x509_buf cri; /**< The raw CertificateRequestInfo body (DER). */ int version; x509_buf subject_raw; /**< The raw subject data (DER). */ x509_name subject; /**< The parsed subject data (named information object). */ pk_context pk; /**< Container for the public key context. */ x509_buf sig_oid; x509_buf sig; md_type_t sig_md; /**< Internal representation of the MD algorithm of the signature algorithm, e.g. POLARSSL_MD_SHA256 */ pk_type_t sig_pk; /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. POLARSSL_PK_RSA */ void *sig_opts; /**< Signature options to be passed to pk_verify_ext(), e.g. for RSASSA-PSS */ } x509_csr; /** * Container for writing a CSR */ typedef struct _x509write_csr { pk_context *key; asn1_named_data *subject; md_type_t md_alg; asn1_named_data *extensions; } x509write_csr; #if defined(POLARSSL_X509_CSR_PARSE_C) /** * \brief Load a Certificate Signing Request (CSR) * * \param csr CSR context to fill * \param buf buffer holding the CRL data * \param buflen size of the buffer * * \return 0 if successful, or a specific X509 or PEM error code */ int x509_csr_parse( x509_csr *csr, const unsigned char *buf, size_t buflen ); #if defined(POLARSSL_FS_IO) /** * \brief Load a Certificate Signing Request (CSR) * * \param csr CSR context to fill * \param path filename to read the CSR from * * \return 0 if successful, or a specific X509 or PEM error code */ int x509_csr_parse_file( x509_csr *csr, const char *path ); #endif /* POLARSSL_FS_IO */ /** * \brief Returns an informational string about the * CSR. * * \param buf Buffer to write to * \param size Maximum size of buffer * \param prefix A line prefix * \param csr The X509 CSR to represent * * \return The length of the string written (exluding the terminating * null byte), or a negative value in case of an error. */ int x509_csr_info( char *buf, size_t size, const char *prefix, const x509_csr *csr ); /** * \brief Initialize a CSR * * \param csr CSR to initialize */ void x509_csr_init( x509_csr *csr ); /** * \brief Unallocate all CSR data * * \param csr CSR to free */ void x509_csr_free( x509_csr *csr ); #endif /* POLARSSL_X509_CSR_PARSE_C */ /* \} name */ /* \} addtogroup x509_module */ #if defined(POLARSSL_X509_CSR_WRITE_C) /** * \brief Initialize a CSR context * * \param ctx CSR context to initialize */ void x509write_csr_init( x509write_csr *ctx ); /** * \brief Set the subject name for a CSR * Subject names should contain a comma-separated list * of OID types and values: * e.g. "C=NL,O=Offspark,CN=PolarSSL Server 1" * * \param ctx CSR context to use * \param subject_name subject name to set * * \return 0 if subject name was parsed successfully, or * a specific error code */ int x509write_csr_set_subject_name( x509write_csr *ctx, const char *subject_name ); /** * \brief Set the key for a CSR (public key will be included, * private key used to sign the CSR when writing it) * * \param ctx CSR context to use * \param key Asymetric key to include */ void x509write_csr_set_key( x509write_csr *ctx, pk_context *key ); /** * \brief Set the MD algorithm to use for the signature * (e.g. POLARSSL_MD_SHA1) * * \param ctx CSR context to use * \param md_alg MD algorithm to use */ void x509write_csr_set_md_alg( x509write_csr *ctx, md_type_t md_alg ); /** * \brief Set the Key Usage Extension flags * (e.g. KU_DIGITAL_SIGNATURE | KU_KEY_CERT_SIGN) * * \param ctx CSR context to use * \param key_usage key usage flags to set * * \return 0 if successful, or POLARSSL_ERR_X509WRITE_MALLOC_FAILED */ int x509write_csr_set_key_usage( x509write_csr *ctx, unsigned char key_usage ); /** * \brief Set the Netscape Cert Type flags * (e.g. NS_CERT_TYPE_SSL_CLIENT | NS_CERT_TYPE_EMAIL) * * \param ctx CSR context to use * \param ns_cert_type Netscape Cert Type flags to set * * \return 0 if successful, or POLARSSL_ERR_X509WRITE_MALLOC_FAILED */ int x509write_csr_set_ns_cert_type( x509write_csr *ctx, unsigned char ns_cert_type ); /** * \brief Generic function to add to or replace an extension in the * CSR * * \param ctx CSR context to use * \param oid OID of the extension * \param oid_len length of the OID * \param val value of the extension OCTET STRING * \param val_len length of the value data * * \return 0 if successful, or a POLARSSL_ERR_X509WRITE_MALLOC_FAILED */ int x509write_csr_set_extension( x509write_csr *ctx, const char *oid, size_t oid_len, const unsigned char *val, size_t val_len ); /** * \brief Free the contents of a CSR context * * \param ctx CSR context to free */ void x509write_csr_free( x509write_csr *ctx ); /** * \brief Write a CSR (Certificate Signing Request) to a * DER structure * Note: data is written at the end of the buffer! Use the * return value to determine where you should start * using the buffer * * \param ctx CSR to write away * \param buf buffer to write to * \param size size of the buffer * \param f_rng RNG function (for signature, see note) * \param p_rng RNG parameter * * \return length of data written if successful, or a specific * error code * * \note f_rng may be NULL if RSA is used for signature and the * signature is made offline (otherwise f_rng is desirable * for countermeasures against timing attacks). * ECDSA signatures always require a non-NULL f_rng. */ int x509write_csr_der( x509write_csr *ctx, unsigned char *buf, size_t size, int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ); #if defined(POLARSSL_PEM_WRITE_C) /** * \brief Write a CSR (Certificate Signing Request) to a * PEM string * * \param ctx CSR to write away * \param buf buffer to write to * \param size size of the buffer * \param f_rng RNG function (for signature, see note) * \param p_rng RNG parameter * * \return 0 successful, or a specific error code * * \note f_rng may be NULL if RSA is used for signature and the * signature is made offline (otherwise f_rng is desirable * for couermeasures against timing attacks). * ECDSA signatures always require a non-NULL f_rng. */ int x509write_csr_pem( x509write_csr *ctx, unsigned char *buf, size_t size, int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ); #endif /* POLARSSL_PEM_WRITE_C */ #endif /* POLARSSL_X509_CSR_WRITE_C */ #ifdef __cplusplus } #endif #endif /* x509_csr.h */