diff options
| author | Joel Sing <jsing@cvs.openbsd.org> | 2024-04-16 13:07:15 +0000 |
|---|---|---|
| committer | Joel Sing <jsing@cvs.openbsd.org> | 2024-04-16 13:07:15 +0000 |
| commit | 6a02cf6846fbac3d44e5f6054cbba29dc26fb5eb (patch) | |
| tree | f135909ae9a5cc0a88e89e313b223a106b7c8917 | |
| parent | 87f395e4a05e2146d6c3f7ac28621bd33d62e95c (diff) | |
Provide bn_expand_bytes().
This will be used in an upcoming change.
ok tb@
| -rw-r--r-- | lib/libcrypto/bn/bn_lib.c | 15 | ||||
| -rw-r--r-- | lib/libcrypto/bn/bn_local.h | 3 |
2 files changed, 16 insertions, 2 deletions
diff --git a/lib/libcrypto/bn/bn_lib.c b/lib/libcrypto/bn/bn_lib.c index 6988a70f3b5..72b988650cc 100644 --- a/lib/libcrypto/bn/bn_lib.c +++ b/lib/libcrypto/bn/bn_lib.c @@ -1,4 +1,4 @@ -/* $OpenBSD: bn_lib.c,v 1.92 2024/04/16 13:04:05 jsing Exp $ */ +/* $OpenBSD: bn_lib.c,v 1.93 2024/04/16 13:07:14 jsing Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * @@ -232,6 +232,19 @@ bn_expand_bits(BIGNUM *bn, size_t bits) } int +bn_expand_bytes(BIGNUM *bn, size_t bytes) +{ + int words; + + if (bytes > (INT_MAX - BN_BYTES + 1)) + return 0; + + words = (bytes + BN_BYTES - 1) / BN_BYTES; + + return bn_wexpand(bn, words); +} + +int bn_wexpand(BIGNUM *bn, int words) { if (words < 0) diff --git a/lib/libcrypto/bn/bn_local.h b/lib/libcrypto/bn/bn_local.h index cffc5a2ea1a..58b5d549034 100644 --- a/lib/libcrypto/bn/bn_local.h +++ b/lib/libcrypto/bn/bn_local.h @@ -1,4 +1,4 @@ -/* $OpenBSD: bn_local.h,v 1.42 2024/04/16 13:04:05 jsing Exp $ */ +/* $OpenBSD: bn_local.h,v 1.43 2024/04/16 13:07:14 jsing Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * @@ -260,6 +260,7 @@ int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, void bn_correct_top(BIGNUM *a); int bn_expand_bits(BIGNUM *a, size_t bits); +int bn_expand_bytes(BIGNUM *a, size_t bytes); int bn_wexpand(BIGNUM *a, int words); BN_ULONG bn_add_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, |