38 lines
1.5 KiB
C
38 lines
1.5 KiB
C
/** Helper functions for tests that manipulate ASN.1 data.
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*/
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#ifndef ASN1_HELPERS_H
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#define ASN1_HELPERS_H
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#include "test/helpers.h"
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/** Skip past an INTEGER in an ASN.1 buffer.
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*
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* Mark the current test case as failed in any of the following conditions:
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* - The buffer does not start with an ASN.1 INTEGER.
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* - The integer's size or parity does not match the constraints expressed
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* through \p min_bits, \p max_bits and \p must_be_odd.
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*
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* \param p Upon entry, `*p` points to the first byte of the
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* buffer to parse.
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* On successful return, `*p` points to the first byte
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* after the parsed INTEGER.
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* On failure, `*p` is unspecified.
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* \param end The end of the ASN.1 buffer.
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* \param min_bits Fail the test case if the integer does not have at
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* least this many significant bits.
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* \param max_bits Fail the test case if the integer has more than
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* this many significant bits.
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* \param must_be_odd Fail the test case if the integer is even.
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*
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* \return \c 0 if the test failed, otherwise 1.
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*/
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int mbedtls_test_asn1_skip_integer(unsigned char **p, const unsigned char *end,
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size_t min_bits, size_t max_bits,
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int must_be_odd);
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#endif /* ASN1_HELPERS_H */
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