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While stereotyped repetitions are frowned upon in literature, they serve a useful purpose in manual pages, because it is easier for the user to find certain information if it is always presented in the same way. For that reason, this commit harmonizes the varying formulations in the HISTORY section about which functions, flags, etc. were added in which OpenSSL version. It also attempts to make the pod files more grep friendly by avoiding to insert line breaks between the symbol names and the corresponding version number in which they were introduced (wherever possible). Some punctuation and typographical errors were fixed on the way. Reviewed-by: Tim Hudson <tjh@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7854)
134 lines
5.1 KiB
Plaintext
134 lines
5.1 KiB
Plaintext
=pod
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=head1 NAME
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ASN1_INTEGER_get_uint64, ASN1_INTEGER_set_uint64,
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ASN1_INTEGER_get_int64, ASN1_INTEGER_get, ASN1_INTEGER_set_int64, ASN1_INTEGER_set, BN_to_ASN1_INTEGER, ASN1_INTEGER_to_BN, ASN1_ENUMERATED_get_int64, ASN1_ENUMERATED_get, ASN1_ENUMERATED_set_int64, ASN1_ENUMERATED_set, BN_to_ASN1_ENUMERATED, ASN1_ENUMERATED_to_BN
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- ASN.1 INTEGER and ENUMERATED utilities
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=head1 SYNOPSIS
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#include <openssl/asn1.h>
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int ASN1_INTEGER_get_int64(int64_t *pr, const ASN1_INTEGER *a);
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long ASN1_INTEGER_get(const ASN1_INTEGER *a);
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int ASN1_INTEGER_set_int64(ASN1_INTEGER *a, int64_t r);
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int ASN1_INTEGER_set(const ASN1_INTEGER *a, long v);
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int ASN1_INTEGER_get_uint64(uint64_t *pr, const ASN1_INTEGER *a);
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int ASN1_INTEGER_set_uint64(ASN1_INTEGER *a, uint64_t r);
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ASN1_INTEGER *BN_to_ASN1_INTEGER(const BIGNUM *bn, ASN1_INTEGER *ai);
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BIGNUM *ASN1_INTEGER_to_BN(const ASN1_INTEGER *ai, BIGNUM *bn);
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int ASN1_ENUMERATED_get_int64(int64_t *pr, const ASN1_INTEGER *a);
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long ASN1_ENUMERATED_get(const ASN1_ENUMERATED *a);
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int ASN1_ENUMERATED_set_int64(ASN1_INTEGER *a, int64_t r);
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int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v);
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ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai);
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BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn);
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=head1 DESCRIPTION
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These functions convert to and from B<ASN1_INTEGER> and B<ASN1_ENUMERATED>
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structures.
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ASN1_INTEGER_get_int64() converts an B<ASN1_INTEGER> into an B<int64_t> type
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If successful it returns 1 and sets B<*pr> to the value of B<a>. If it fails
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(due to invalid type or the value being too big to fit into an B<int64_t> type)
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it returns 0.
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ASN1_INTEGER_get_uint64() is similar to ASN1_INTEGER_get_int64_t() except it
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converts to a B<uint64_t> type and an error is returned if the passed integer
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is negative.
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ASN1_INTEGER_get() also returns the value of B<a> but it returns 0 if B<a> is
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NULL and -1 on error (which is ambiguous because -1 is a legitimate value for
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an B<ASN1_INTEGER>). New applications should use ASN1_INTEGER_get_int64()
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instead.
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ASN1_INTEGER_set_int64() sets the value of B<ASN1_INTEGER> B<a> to the
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B<int64_t> value B<r>.
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ASN1_INTEGER_set_uint64() sets the value of B<ASN1_INTEGER> B<a> to the
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B<uint64_t> value B<r>.
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ASN1_INTEGER_set() sets the value of B<ASN1_INTEGER> B<a> to the B<long> value
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B<v>.
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BN_to_ASN1_INTEGER() converts B<BIGNUM> B<bn> to an B<ASN1_INTEGER>. If B<ai>
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is NULL a new B<ASN1_INTEGER> structure is returned. If B<ai> is not NULL then
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the existing structure will be used instead.
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ASN1_INTEGER_to_BN() converts ASN1_INTEGER B<ai> into a B<BIGNUM>. If B<bn> is
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NULL a new B<BIGNUM> structure is returned. If B<bn> is not NULL then the
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existing structure will be used instead.
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ASN1_ENUMERATED_get_int64(), ASN1_ENUMERATED_set_int64(),
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ASN1_ENUMERATED_set(), BN_to_ASN1_ENUMERATED() and ASN1_ENUMERATED_to_BN()
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behave in an identical way to their ASN1_INTEGER counterparts except they
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operate on an B<ASN1_ENUMERATED> value.
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ASN1_ENUMERATED_get() returns the value of B<a> in a similar way to
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ASN1_INTEGER_get() but it returns B<0xffffffffL> if the value of B<a> will not
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fit in a long type. New applications should use ASN1_ENUMERATED_get_int64()
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instead.
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=head1 NOTES
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In general an B<ASN1_INTEGER> or B<ASN1_ENUMERATED> type can contain an
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integer of almost arbitrary size and so cannot always be represented by a C
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B<int64_t> type. However in many cases (for example version numbers) they
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represent small integers which can be more easily manipulated if converted to
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an appropriate C integer type.
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=head1 BUGS
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The ambiguous return values of ASN1_INTEGER_get() and ASN1_ENUMERATED_get()
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mean these functions should be avoided if possible. They are retained for
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compatibility. Normally the ambiguous return values are not legitimate
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values for the fields they represent.
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=head1 RETURN VALUES
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ASN1_INTEGER_set_int64(), ASN1_INTEGER_set(), ASN1_ENUMERATED_set_int64() and
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ASN1_ENUMERATED_set() return 1 for success and 0 for failure. They will only
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fail if a memory allocation error occurs.
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ASN1_INTEGER_get_int64() and ASN1_ENUMERATED_get_int64() return 1 for success
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and 0 for failure. They will fail if the passed type is incorrect (this will
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only happen if there is a programming error) or if the value exceeds the range
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of an B<int64_t> type.
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BN_to_ASN1_INTEGER() and BN_to_ASN1_ENUMERATED() return an B<ASN1_INTEGER> or
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B<ASN1_ENUMERATED> structure respectively or NULL if an error occurs. They will
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only fail due to a memory allocation error.
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ASN1_INTEGER_to_BN() and ASN1_ENUMERATED_to_BN() return a B<BIGNUM> structure
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of NULL if an error occurs. They can fail if the passed type is incorrect
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(due to programming error) or due to a memory allocation failure.
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=head1 SEE ALSO
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L<ERR_get_error(3)>
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=head1 HISTORY
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ASN1_INTEGER_set_int64(), ASN1_INTEGER_get_int64(),
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ASN1_ENUMERATED_set_int64() and ASN1_ENUMERATED_get_int64()
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were added in OpenSSL 1.1.0.
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=head1 COPYRIGHT
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Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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