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387d170b32
Add bn_mul_fixed_top, bn_from_mont_fixed_top, bn_mod_sub_fixed_top.
Switch to bn_{mul|sqr}_fixed_top in bn_mul_mont_fixed_top and remove
memset in bn_from_montgomery_word.
(cherry picked from commit fcc4ee09473cac511eca90faa003661c7786e4f9)
Resolved conflicts:
crypto/bn/bn_mod.c
crypto/bn_int.h
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/6942)
22 lines
1.1 KiB
C
22 lines
1.1 KiB
C
/*
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* Some BIGNUM functions assume most significant limb to be non-zero, which
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* is customarily arranged by bn_correct_top. Output from below functions
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* is not processed with bn_correct_top, and for this reason it may not be
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* returned out of public API. It may only be passed internally into other
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* functions known to support non-minimal or zero-padded BIGNUMs.
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*/
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int bn_mul_mont_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
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BN_MONT_CTX *mont, BN_CTX *ctx);
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int bn_from_mont_fixed_top(BIGNUM *r, const BIGNUM *a, BN_MONT_CTX *mont,
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BN_CTX *ctx);
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int bn_to_mont_fixed_top(BIGNUM *r, const BIGNUM *a, BN_MONT_CTX *mont,
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BN_CTX *ctx);
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int bn_mod_add_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
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const BIGNUM *m);
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int bn_mod_sub_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
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const BIGNUM *m);
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int bn_mul_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
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int bn_sqr_fixed_top(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
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int bn_bn2binpad(const BIGNUM *a, unsigned char *to, int tolen);
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