diff options
Diffstat (limited to 'libressl/include/openssl/bn.h')
| -rw-r--r-- | libressl/include/openssl/bn.h | 104 |
1 files changed, 86 insertions, 18 deletions
diff --git a/libressl/include/openssl/bn.h b/libressl/include/openssl/bn.h index 0dde08a..cc1f467 100644 --- a/libressl/include/openssl/bn.h +++ b/libressl/include/openssl/bn.h @@ -1,4 +1,4 @@ -/* $OpenBSD: bn.h,v 1.36 2017/01/25 06:15:44 beck Exp $ */ +/* $OpenBSD: bn.h,v 1.39 2019/08/25 19:23:59 schwarze Exp $ */ /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) * All rights reserved. * @@ -285,6 +285,11 @@ struct bn_gencb_st { int (*cb_2)(int, int, BN_GENCB *); } cb; }; + +BN_GENCB *BN_GENCB_new(void); +void BN_GENCB_free(BN_GENCB *cb); +void *BN_GENCB_get_arg(BN_GENCB *cb); + /* Wrapper function to make using BN_GENCB easier, */ int BN_GENCB_call(BN_GENCB *cb, int a, int b); /* Macro to populate a BN_GENCB structure with an "old"-style callback */ @@ -303,24 +308,79 @@ int BN_GENCB_call(BN_GENCB *cb, int a, int b); #define BN_prime_checks 0 /* default: select number of iterations based on the size of the number */ -/* number of Miller-Rabin iterations for an error rate of less than 2^-80 - * for random 'b'-bit input, b >= 100 (taken from table 4.4 in the Handbook - * of Applied Cryptography [Menezes, van Oorschot, Vanstone; CRC Press 1996]; - * original paper: Damgaard, Landrock, Pomerance: Average case error estimates - * for the strong probable prime test. -- Math. Comp. 61 (1993) 177-194) */ -#define BN_prime_checks_for_size(b) ((b) >= 1300 ? 2 : \ - (b) >= 850 ? 3 : \ - (b) >= 650 ? 4 : \ - (b) >= 550 ? 5 : \ - (b) >= 450 ? 6 : \ - (b) >= 400 ? 7 : \ - (b) >= 350 ? 8 : \ - (b) >= 300 ? 9 : \ - (b) >= 250 ? 12 : \ - (b) >= 200 ? 15 : \ - (b) >= 150 ? 18 : \ - /* b >= 100 */ 27) +/* + * BN_prime_checks_for_size() returns the number of Miller-Rabin + * iterations that will be done for checking that a random number + * is probably prime. The error rate for accepting a composite + * number as prime depends on the size of the prime |b|. The error + * rates used are for calculating an RSA key with 2 primes, and so + * the level is what you would expect for a key of double the size + * of the prime. + * + * This table is generated using the algorithm of FIPS PUB 186-4 + * Digital Signature Standard (DSS), section F.1, page 117. + * (https://dx.doi.org/10.6028/NIST.FIPS.186-4) + * + * The following magma script was used to generate the output: + * securitybits:=125; + * k:=1024; + * for t:=1 to 65 do + * for M:=3 to Floor(2*Sqrt(k-1)-1) do + * S:=0; + * // Sum over m + * for m:=3 to M do + * s:=0; + * // Sum over j + * for j:=2 to m do + * s+:=(RealField(32)!2)^-(j+(k-1)/j); + * end for; + * S+:=2^(m-(m-1)*t)*s; + * end for; + * A:=2^(k-2-M*t); + * B:=8*(Pi(RealField(32))^2-6)/3*2^(k-2)*S; + * pkt:=2.00743*Log(2)*k*2^-k*(A+B); + * seclevel:=Floor(-Log(2,pkt)); + * if seclevel ge securitybits then + * printf "k: %5o, security: %o bits (t: %o, M: %o)\n",k,seclevel,t,M; + * break; + * end if; + * end for; + * if seclevel ge securitybits then break; end if; + * end for; + * + * It can be run online at: + * http://magma.maths.usyd.edu.au/calc + * + * And will output: + * k: 1024, security: 129 bits (t: 6, M: 23) + * + * k is the number of bits of the prime, securitybits is the level + * we want to reach. + * + * prime length | RSA key size | # MR tests | security level + * -------------+--------------|------------+--------------- + * (b) >= 6394 | >= 12788 | 3 | 256 bit + * (b) >= 3747 | >= 7494 | 3 | 192 bit + * (b) >= 1345 | >= 2690 | 4 | 128 bit + * (b) >= 1080 | >= 2160 | 5 | 128 bit + * (b) >= 852 | >= 1704 | 5 | 112 bit + * (b) >= 476 | >= 952 | 5 | 80 bit + * (b) >= 400 | >= 800 | 6 | 80 bit + * (b) >= 347 | >= 694 | 7 | 80 bit + * (b) >= 308 | >= 616 | 8 | 80 bit + * (b) >= 55 | >= 110 | 27 | 64 bit + * (b) >= 6 | >= 12 | 34 | 64 bit + */ +#define BN_prime_checks_for_size(b) ((b) >= 3747 ? 3 : \ + (b) >= 1345 ? 4 : \ + (b) >= 476 ? 5 : \ + (b) >= 400 ? 6 : \ + (b) >= 347 ? 7 : \ + (b) >= 308 ? 8 : \ + (b) >= 55 ? 27 : \ + /* b >= 6 */ 34) + #define BN_num_bytes(a) ((BN_num_bits(a)+7)/8) /* Note that BN_abs_is_word didn't work reliably for w == 0 until 0.9.8 */ @@ -628,6 +688,8 @@ const BIGNUM *BN_get0_nist_prime_521(void); /* Primes from RFC 2409 */ BIGNUM *get_rfc2409_prime_768(BIGNUM *bn); BIGNUM *get_rfc2409_prime_1024(BIGNUM *bn); +BIGNUM *BN_get_rfc2409_prime_768(BIGNUM *bn); +BIGNUM *BN_get_rfc2409_prime_1024(BIGNUM *bn); /* Primes from RFC 3526 */ BIGNUM *get_rfc3526_prime_1536(BIGNUM *bn); @@ -636,6 +698,12 @@ BIGNUM *get_rfc3526_prime_3072(BIGNUM *bn); BIGNUM *get_rfc3526_prime_4096(BIGNUM *bn); BIGNUM *get_rfc3526_prime_6144(BIGNUM *bn); BIGNUM *get_rfc3526_prime_8192(BIGNUM *bn); +BIGNUM *BN_get_rfc3526_prime_1536(BIGNUM *bn); +BIGNUM *BN_get_rfc3526_prime_2048(BIGNUM *bn); +BIGNUM *BN_get_rfc3526_prime_3072(BIGNUM *bn); +BIGNUM *BN_get_rfc3526_prime_4096(BIGNUM *bn); +BIGNUM *BN_get_rfc3526_prime_6144(BIGNUM *bn); +BIGNUM *BN_get_rfc3526_prime_8192(BIGNUM *bn); /* BEGIN ERROR CODES */ /* The following lines are auto generated by the script mkerr.pl. Any changes |