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    Restrict the size of OBJECT IDENTIFIERs that OBJ_obj2txt will translate · 4a88c762
    Richard Levitte 提交于
    OBJ_obj2txt() would translate any size OBJECT IDENTIFIER to canonical
    numeric text form.  For gigantic sub-identifiers, this would take a very
    long time, the time complexity being O(n^2) where n is the size of that
    sub-identifier.
    
    To mitigate this, a restriction on the size that OBJ_obj2txt() will
    translate to canonical numeric text form is added, based on RFC 2578
    (STD 58), which says this:
    
    > 3.5. OBJECT IDENTIFIER values
    >
    > An OBJECT IDENTIFIER value is an ordered list of non-negative numbers.
    > For the SMIv2, each number in the list is referred to as a sub-identifier,
    > there are at most 128 sub-identifiers in a value, and each sub-identifier
    > has a maximum value of 2^32-1 (4294967295 decimal).
    
    Fixes otc/security#96
    Fixes CVE-2023-2650
    Reviewed-by: NMatt Caswell <matt@openssl.org>
    Reviewed-by: NTomas Mraz <tomas@openssl.org>
    Signed-off-by: Ncode4lala <fengziteng2@huawei.com>
    4a88c762
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