97 lines
3.7 KiB
C
97 lines
3.7 KiB
C
/* -*- c-basic-offset: 8 -*-
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rdesktop: A Remote Desktop Protocol client.
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ASN.1 utility functions header
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Copyright 2017 Alexander Zakharov <uglym8@gmail.com>
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef RDASN_H
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#define RDASN_H
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#include <gnutls/gnutls.h>
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#include <libtasn1.h>
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#include <stdint.h>
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#include "utils.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define OID_SHA_WITH_RSA_SIGNATURE "1.3.14.3.2.15"
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#define OID_MD5_WITH_RSA_SIGNATURE "1.3.14.3.2.25"
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/**
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* Initialize the ASN.1 library.
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*
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* This function initializes the ASN.1 library and should be called before any other ASN.1 functions.
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*
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* Returns: 0 on success, or a non-zero error code on failure.
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*/
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extern int init_asn1_lib(void);
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/**
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* Encode an RSA public key into DER PKCS#1 format.
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*
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* This function encodes an RSA public key into DER PKCS#1 format. The modulus and exponent of the public key are
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* provided as input, and the encoded key is returned in the output buffer.
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*
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* Parameters:
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* - m: A pointer to a gnutls_datum_t structure that contains the modulus of the public key.
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* - e: A pointer to a gnutls_datum_t structure that contains the exponent of the public key.
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* - out: A pointer to the output buffer where the encoded key will be stored.
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* - out_len: A pointer to an integer that will be set to the length of the encoded key.
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*
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* Returns: 0 on success, or a non-zero error code on failure.
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*/
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extern int write_pkcs1_der_pubkey(const gnutls_datum_t *m, const gnutls_datum_t *e, uint8_t *out, int *out_len);
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/**
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* Read the public key algorithm OID from a DER encoded x.509 certificate.
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*
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* This function reads the public key algorithm OID from a DER encoded x.509 certificate. The certificate is provided
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* as input, and the OID is returned in the output buffer.
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*
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* Parameters:
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* - data: A pointer to the input buffer that contains the DER encoded x.509 certificate.
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* - len: The length of the input buffer.
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* - oid: A pointer to the output buffer where the OID will be stored.
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* - oid_size: A pointer to an integer that will be set to the length of the OID.
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*
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* Returns: 0 on success, or a non-zero error code on failure.
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*/
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extern int libtasn_read_cert_pk_oid(uint8_t *data, size_t len, char *oid, size_t *oid_size);
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/**
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* Read the public key parameters from a DER encoded x.509 certificate.
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*
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* This function reads the public key parameters (modulus and exponent) from a DER encoded x.509 certificate. The
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* certificate is provided as input, and the parameters are returned in the output buffers.
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*
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* Parameters:
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* - data: A pointer to the input buffer that contains the DER encoded x.509 certificate.
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* - len: The length of the input buffer.
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* - m: A pointer to a gnutls_datum_t structure that will be set to the modulus of the public key.
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* - e: A pointer to a gnutls_datum_t structure that will be set to the exponent of the public key.
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*
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* Returns: 0 on success, or a non-zero error code on failure.
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*/
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extern int libtasn_read_cert_pk_parameters(uint8_t *data, size_t len, gnutls_datum_t *m, gnutls_datum_t *e);
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#ifdef __cplusplus
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}
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#endif
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#endif /* RDASN_H */
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