New function BN_nist_mod_func which returns an appropriate function

[openssl.git] / crypto / bn / bn_nist.c

diff --git a/crypto/bn/bn_nist.c b/crypto/bn/bn_nist.c
index 2ca5b0139111f76352b3d2c08ba6232056efb942..97f980a1314341ef609bbaf2e0066e560067e21b 100644 (file)
--- a/crypto/bn/bn_nist.c
+++ b/crypto/bn/bn_nist.c
@@ -834,3 +834,18 @@ int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
 
        return 1;
        }
+
+int (*BN_nist_mod_func(const BIGNUM *p))(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, BN_CTX *ctx)
+       {
+       if (BN_ucmp(&_bignum_nist_p_192, p) == 0)
+               return BN_nist_mod_192;
+       if (BN_ucmp(&_bignum_nist_p_224, p) == 0)
+               return BN_nist_mod_224;
+       if (BN_ucmp(&_bignum_nist_p_256, p) == 0)
+               return BN_nist_mod_256;
+       if (BN_ucmp(&_bignum_nist_p_384, p) == 0)
+               return BN_nist_mod_384;
+       if (BN_ucmp(&_bignum_nist_p_521, p) == 0)
+               return BN_nist_mod_521;
+       return 0;
+       }