diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/include/mbedtls/asn1write.h')
| -rw-r--r-- | lib/mbedtls-2.27.0/include/mbedtls/asn1write.h | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/lib/mbedtls-2.27.0/include/mbedtls/asn1write.h b/lib/mbedtls-2.27.0/include/mbedtls/asn1write.h new file mode 100644 index 0000000..44afae0 --- /dev/null +++ b/lib/mbedtls-2.27.0/include/mbedtls/asn1write.h @@ -0,0 +1,370 @@ +/** + * \file asn1write.h + * + * \brief ASN.1 buffer writing functionality + */ +/* + * Copyright The Mbed TLS Contributors + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef MBEDTLS_ASN1_WRITE_H +#define MBEDTLS_ASN1_WRITE_H + +#if !defined(MBEDTLS_CONFIG_FILE) +#include "mbedtls/config.h" +#else +#include MBEDTLS_CONFIG_FILE +#endif + +#include "mbedtls/asn1.h" + +#define MBEDTLS_ASN1_CHK_ADD(g, f) \ + do \ + { \ + if( ( ret = (f) ) < 0 ) \ + return( ret ); \ + else \ + (g) += ret; \ + } while( 0 ) + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief Write a length field in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param len The length value to write. + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_len( unsigned char **p, unsigned char *start, + size_t len ); +/** + * \brief Write an ASN.1 tag in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param tag The tag to write. + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_tag( unsigned char **p, unsigned char *start, + unsigned char tag ); + +/** + * \brief Write raw buffer data. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param buf The data buffer to write. + * \param size The length of the data buffer. + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_raw_buffer( unsigned char **p, unsigned char *start, + const unsigned char *buf, size_t size ); + +#if defined(MBEDTLS_BIGNUM_C) +/** + * \brief Write a arbitrary-precision number (#MBEDTLS_ASN1_INTEGER) + * in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param X The MPI to write. + * It must be non-negative. + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_mpi( unsigned char **p, unsigned char *start, + const mbedtls_mpi *X ); +#endif /* MBEDTLS_BIGNUM_C */ + +/** + * \brief Write a NULL tag (#MBEDTLS_ASN1_NULL) with zero data + * in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_null( unsigned char **p, unsigned char *start ); + +/** + * \brief Write an OID tag (#MBEDTLS_ASN1_OID) and data + * in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param oid The OID to write. + * \param oid_len The length of the OID. + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_oid( unsigned char **p, unsigned char *start, + const char *oid, size_t oid_len ); + +/** + * \brief Write an AlgorithmIdentifier sequence in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param oid The OID of the algorithm to write. + * \param oid_len The length of the algorithm's OID. + * \param par_len The length of the parameters, which must be already written. + * If 0, NULL parameters are added + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_algorithm_identifier( unsigned char **p, + unsigned char *start, + const char *oid, size_t oid_len, + size_t par_len ); + +/** + * \brief Write a boolean tag (#MBEDTLS_ASN1_BOOLEAN) and value + * in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param boolean The boolean value to write, either \c 0 or \c 1. + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_bool( unsigned char **p, unsigned char *start, + int boolean ); + +/** + * \brief Write an int tag (#MBEDTLS_ASN1_INTEGER) and value + * in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param val The integer value to write. + * It must be non-negative. + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_int( unsigned char **p, unsigned char *start, int val ); + +/** + * \brief Write an enum tag (#MBEDTLS_ASN1_ENUMERATED) and value + * in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param val The integer value to write. + * + * \return The number of bytes written to \p p on success. + * \return A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure. + */ +int mbedtls_asn1_write_enum( unsigned char **p, unsigned char *start, int val ); + +/** + * \brief Write a string in ASN.1 format using a specific + * string encoding tag. + + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param tag The string encoding tag to write, e.g. + * #MBEDTLS_ASN1_UTF8_STRING. + * \param text The string to write. + * \param text_len The length of \p text in bytes (which might + * be strictly larger than the number of characters). + * + * \return The number of bytes written to \p p on success. + * \return A negative error code on failure. + */ +int mbedtls_asn1_write_tagged_string( unsigned char **p, unsigned char *start, + int tag, const char *text, + size_t text_len ); + +/** + * \brief Write a string in ASN.1 format using the PrintableString + * string encoding tag (#MBEDTLS_ASN1_PRINTABLE_STRING). + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param text The string to write. + * \param text_len The length of \p text in bytes (which might + * be strictly larger than the number of characters). + * + * \return The number of bytes written to \p p on success. + * \return A negative error code on failure. + */ +int mbedtls_asn1_write_printable_string( unsigned char **p, + unsigned char *start, + const char *text, size_t text_len ); + +/** + * \brief Write a UTF8 string in ASN.1 format using the UTF8String + * string encoding tag (#MBEDTLS_ASN1_UTF8_STRING). + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param text The string to write. + * \param text_len The length of \p text in bytes (which might + * be strictly larger than the number of characters). + * + * \return The number of bytes written to \p p on success. + * \return A negative error code on failure. + */ +int mbedtls_asn1_write_utf8_string( unsigned char **p, unsigned char *start, + const char *text, size_t text_len ); + +/** + * \brief Write a string in ASN.1 format using the IA5String + * string encoding tag (#MBEDTLS_ASN1_IA5_STRING). + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param text The string to write. + * \param text_len The length of \p text in bytes (which might + * be strictly larger than the number of characters). + * + * \return The number of bytes written to \p p on success. + * \return A negative error code on failure. + */ +int mbedtls_asn1_write_ia5_string( unsigned char **p, unsigned char *start, + const char *text, size_t text_len ); + +/** + * \brief Write a bitstring tag (#MBEDTLS_ASN1_BIT_STRING) and + * value in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param buf The bitstring to write. + * \param bits The total number of bits in the bitstring. + * + * \return The number of bytes written to \p p on success. + * \return A negative error code on failure. + */ +int mbedtls_asn1_write_bitstring( unsigned char **p, unsigned char *start, + const unsigned char *buf, size_t bits ); + +/** + * \brief This function writes a named bitstring tag + * (#MBEDTLS_ASN1_BIT_STRING) and value in ASN.1 format. + * + * As stated in RFC 5280 Appendix B, trailing zeroes are + * omitted when encoding named bitstrings in DER. + * + * \note This function works backwards within the data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer which is used for bounds-checking. + * \param buf The bitstring to write. + * \param bits The total number of bits in the bitstring. + * + * \return The number of bytes written to \p p on success. + * \return A negative error code on failure. + */ +int mbedtls_asn1_write_named_bitstring( unsigned char **p, + unsigned char *start, + const unsigned char *buf, + size_t bits ); + +/** + * \brief Write an octet string tag (#MBEDTLS_ASN1_OCTET_STRING) + * and value in ASN.1 format. + * + * \note This function works backwards in data buffer. + * + * \param p The reference to the current position pointer. + * \param start The start of the buffer, for bounds-checking. + * \param buf The buffer holding the data to write. + * \param size The length of the data buffer \p buf. + * + * \return The number of bytes written to \p p on success. + * \return A negative error code on failure. + */ +int mbedtls_asn1_write_octet_string( unsigned char **p, unsigned char *start, + const unsigned char *buf, size_t size ); + +/** + * \brief Create or find a specific named_data entry for writing in a + * sequence or list based on the OID. If not already in there, + * a new entry is added to the head of the list. + * Warning: Destructive behaviour for the val data! + * + * \param list The pointer to the location of the head of the list to seek + * through (will be updated in case of a new entry). + * \param oid The OID to look for. + * \param oid_len The size of the OID. + * \param val The associated data to store. If this is \c NULL, + * no data is copied to the new or existing buffer. + * \param val_len The minimum length of the data buffer needed. + * If this is 0, do not allocate a buffer for the associated + * data. + * If the OID was already present, enlarge, shrink or free + * the existing buffer to fit \p val_len. + * + * \return A pointer to the new / existing entry on success. + * \return \c NULL if if there was a memory allocation error. + */ +mbedtls_asn1_named_data *mbedtls_asn1_store_named_data( mbedtls_asn1_named_data **list, + const char *oid, size_t oid_len, + const unsigned char *val, + size_t val_len ); + +#ifdef __cplusplus +} +#endif + +#endif /* MBEDTLS_ASN1_WRITE_H */ |