diff options
Diffstat (limited to 'openssl-1.1.0h/doc/crypto/ASN1_INTEGER_get_int64.pod')
| -rw-r--r-- | openssl-1.1.0h/doc/crypto/ASN1_INTEGER_get_int64.pod | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/openssl-1.1.0h/doc/crypto/ASN1_INTEGER_get_int64.pod b/openssl-1.1.0h/doc/crypto/ASN1_INTEGER_get_int64.pod new file mode 100644 index 0000000..f61268d --- /dev/null +++ b/openssl-1.1.0h/doc/crypto/ASN1_INTEGER_get_int64.pod @@ -0,0 +1,133 @@ +=pod + +=head1 NAME + +ASN1_INTEGER_get_uint64, ASN1_INTEGER_set_uint64, +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 +- ASN.1 INTEGER and ENUMERATED utilities + +=head1 SYNOPSIS + + #include <openssl/asn1.h> + + int ASN1_INTEGER_get_int64(int64_t *pr, const ASN1_INTEGER *a); + int ASN1_INTEGER_get(const ASN1_INTEGER *a, long v); + + int ASN1_INTEGER_set_int64(ASN1_INTEGER *a, int64_t r); + long ASN1_INTEGER_set(const ASN1_INTEGER *a); + + int ASN1_INTEGER_get_uint64(uint64_t *pr, const ASN1_INTEGER *a); + int ASN1_INTEGER_set_uint64(ASN1_INTEGER *a, uint64_t r); + + ASN1_INTEGER *BN_to_ASN1_INTEGER(const BIGNUM *bn, ASN1_INTEGER *ai); + BIGNUM *ASN1_INTEGER_to_BN(const ASN1_INTEGER *ai, BIGNUM *bn); + + int ASN1_ENUMERATED_get_int64(int64_t *pr, const ASN1_INTEGER *a); + long ASN1_ENUMERATED_get(const ASN1_ENUMERATED *a); + + int ASN1_ENUMERATED_set_int64(ASN1_INTEGER *a, int64_t r); + int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v); + + ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai); + BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn); + +=head1 DESCRIPTION + +These functions convert to and from B<ASN1_INTEGER> and B<ASN1_ENUMERATED> +structures. + +ASN1_INTEGER_get_int64() converts an B<ASN1_INTEGER> into an B<int64_t> type +If successful it returns 1 and sets B<*pr> to the value of B<a>. If it fails +(due to invalid type or the value being too big to fit into an B<int64_t> type) +it returns 0. + +ASN1_INTEGER_get_uint64() is similar to ASN1_INTEGER_get_int64_t() except it +converts to a B<uint64_t> type and an error is returned if the passed integer +is negative. + +ASN1_INTEGER_get() also returns the value of B<a> but it returns 0 if B<a> is +NULL and -1 on error (which is ambiguous because -1 is a legitimate value for +an B<ASN1_INTEGER>). New applications should use ASN1_INTEGER_get_int64() +instead. + +ASN1_INTEGER_set_int64() sets the value of B<ASN1_INTEGER> B<a> to the +B<int64_t> value B<r>. + +ASN1_INTEGER_set_uint64() sets the value of B<ASN1_INTEGER> B<a> to the +B<uint64_t> value B<r>. + +ASN1_INTEGER_set() sets the value of B<ASN1_INTEGER> B<a> to the B<long> value +B<v>. + +BN_to_ASN1_INTEGER() converts B<BIGNUM> B<bn> to an B<ASN1_INTEGER>. If B<ai> +is NULL a new B<ASN1_INTEGER> structure is returned. If B<ai> is not NULL then +the existing structure will be used instead. + +ASN1_INTEGER_to_BN() converts ASN1_INTEGER B<ai> into a B<BIGNUM>. If B<bn> is +NULL a new B<BIGNUM> structure is returned. If B<bn> is not NULL then the +existing structure will be used instead. + +ASN1_ENUMERATED_get_int64(), ASN1_ENUMERATED_set_int64(), +ASN1_ENUMERATED_set(), BN_to_ASN1_ENUMERATED() and ASN1_ENUMERATED_to_BN() +behave in an identical way to their ASN1_INTEGER counterparts except they +operate on an B<ASN1_ENUMERATED> value. + +ASN1_ENUMERATED_get() returns the value of B<a> in a similar way to +ASN1_INTEGER_get() but it returns B<0xffffffffL> if the value of B<a> will not +fit in a long type. New applications should use ASN1_ENUMERATED_get_int64() +instead. + +=head1 NOTES + +In general an B<ASN1_INTEGER> or B<ASN1_ENUMERATED> type can contain an +integer of almost arbitrary size and so cannot always be represented by a C +B<int64_t> type. However in many cases (for example version numbers) they +represent small integers which can be more easily manipulated if converted to +an appropriate C integer type. + +=head1 BUGS + +The ambiguous return values of ASN1_INTEGER_get() and ASN1_ENUMERATED_get() +mean these functions should be avoided if possible. They are retained for +compatibility. Normally the ambiguous return values are not legitimate +values for the fields they represent. + +=head1 RETURN VALUES + +ASN1_INTEGER_set_int64(), ASN1_INTEGER_set(), ASN1_ENUMERATED_set_int64() and +ASN1_ENUMERATED_set() return 1 for success and 0 for failure. They will only +fail if a memory allocation error occurs. + +ASN1_INTEGER_get_int64() and ASN1_ENUMERATED_get_int64() return 1 for success +and 0 for failure. They will fail if the passed type is incorrect (this will +only happen if there is a programming error) or if the value exceeds the range +of an B<int64_t> type. + +BN_to_ASN1_INTEGER() and BN_to_ASN1_ENUMERATED() return an B<ASN1_INTEGER> or +B<ASN1_ENUMERATED> structure respectively or NULL if an error occurs. They will +only fail due to a memory allocation error. + +ASN1_INTEGER_to_BN() and ASN1_ENUMERATED_to_BN() return a B<BIGNUM> structure +of NULL if an error occurs. They can fail if the passed type is incorrect +(due to programming error) or due to a memory allocation failure. + +=head1 SEE ALSO + +L<ERR_get_error(3)> + +=head1 HISTORY + +ASN1_INTEGER_set_int64(), ASN1_INTEGER_get_int64(), +ASN1_ENUMERATED_set_int64() and ASN1_ENUMERATED_get_int64() +were added to OpenSSL 1.1.0. + +=head1 COPYRIGHT + +Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved. + +Licensed under the OpenSSL license (the "License"). You may not use +this file except in compliance with the License. You can obtain a copy +in the file LICENSE in the source distribution or at +L<https://www.openssl.org/source/license.html>. + +=cut |