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

SYNOPSIS

        #include <openssl/asn1.h>

        int ASN1_INTEGER_get_int64(int64_t *pr, const ASN1_INTEGER *a);
        long ASN1_INTEGER_get(const ASN1_INTEGER *a);

        int ASN1_INTEGER_set_int64(ASN1_INTEGER *a, int64_t r);
        int ASN1_INTEGER_set(const ASN1_INTEGER *a, long v);

        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);

DESCRIPTION

       These functions convert to and from ASN1_INTEGER and ASN1_ENUMERATED structures.

       ASN1_INTEGER_get_int64() converts an ASN1_INTEGER into an int64_t type If successful it
       returns 1 and sets *pr to the value of a. If it fails (due to invalid type or the value
       being too big to fit into an int64_t type) it returns 0.

       ASN1_INTEGER_get_uint64() is similar to ASN1_INTEGER_get_int64_t() except it converts to a
       uint64_t type and an error is returned if the passed integer is negative.

       ASN1_INTEGER_get() also returns the value of a but it returns 0 if a is NULL and -1 on
       error (which is ambiguous because -1 is a legitimate value for an ASN1_INTEGER). New
       applications should use ASN1_INTEGER_get_int64() instead.

       ASN1_INTEGER_set_int64() sets the value of ASN1_INTEGER a to the int64_t value r.

       ASN1_INTEGER_set_uint64() sets the value of ASN1_INTEGER a to the uint64_t value r.

       ASN1_INTEGER_set() sets the value of ASN1_INTEGER a to the long value v.

       BN_to_ASN1_INTEGER() converts BIGNUM bn to an ASN1_INTEGER. If ai is NULL a new
       ASN1_INTEGER structure is returned. If ai is not NULL then the existing structure will be
       used instead.

       ASN1_INTEGER_to_BN() converts ASN1_INTEGER ai into a BIGNUM. If bn is NULL a new BIGNUM
       structure is returned. If 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 ASN1_ENUMERATED value.

       ASN1_ENUMERATED_get() returns the value of a in a similar way to ASN1_INTEGER_get() but it
       returns 0xffffffffL if the value of a will not fit in a long type. New applications should
       use ASN1_ENUMERATED_get_int64() instead.

NOTES

       In general an ASN1_INTEGER or ASN1_ENUMERATED type can contain an integer of almost
       arbitrary size and so cannot always be represented by a C 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.

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.

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 int64_t type.

       BN_to_ASN1_INTEGER() and BN_to_ASN1_ENUMERATED() return an ASN1_INTEGER or 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 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.

SEE ALSO

       ERR_get_error(3)

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.

COPYRIGHT

       Copyright 2015-2018 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 <https://www.openssl.org/source/license.html>.