// Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // https://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. #include #include #include #include #include #include "../fipsmodule/bn/internal.h" #include "../fipsmodule/dh/internal.h" static BIGNUM *get_params(BIGNUM *ret, bssl::Span words) { BIGNUM *alloc = nullptr; if (ret == nullptr) { alloc = BN_new(); if (alloc == nullptr) { return nullptr; } ret = alloc; } if (!bn_set_words(ret, words.data(), words.size())) { BN_free(alloc); return nullptr; } return ret; } BIGNUM *BN_get_rfc3526_prime_1536(BIGNUM *ret) { static const BN_ULONG kWords[] = { TOBN(0xffffffff, 0xffffffff), TOBN(0xf1746c08, 0xca237327), TOBN(0x670c354e, 0x4abc9804), TOBN(0x9ed52907, 0x7096966d), TOBN(0x1c62f356, 0x208552bb), TOBN(0x83655d23, 0xdca3ad96), TOBN(0x69163fa8, 0xfd24cf5f), TOBN(0x98da4836, 0x1c55d39a), TOBN(0xc2007cb8, 0xa163bf05), TOBN(0x49286651, 0xece45b3d), TOBN(0xae9f2411, 0x7c4b1fe6), TOBN(0xee386bfb, 0x5a899fa5), TOBN(0x0bff5cb6, 0xf406b7ed), TOBN(0xf44c42e9, 0xa637ed6b), TOBN(0xe485b576, 0x625e7ec6), TOBN(0x4fe1356d, 0x6d51c245), TOBN(0x302b0a6d, 0xf25f1437), TOBN(0xef9519b3, 0xcd3a431b), TOBN(0x514a0879, 0x8e3404dd), TOBN(0x020bbea6, 0x3b139b22), TOBN(0x29024e08, 0x8a67cc74), TOBN(0xc4c6628b, 0x80dc1cd1), TOBN(0xc90fdaa2, 0x2168c234), TOBN(0xffffffff, 0xffffffff), }; return get_params(ret, kWords); } BIGNUM *BN_get_rfc3526_prime_2048(BIGNUM *ret) { static const BN_ULONG kWords[] = { TOBN(0xffffffff, 0xffffffff), TOBN(0x15728e5a, 0x8aacaa68), TOBN(0x15d22618, 0x98fa0510), TOBN(0x3995497c, 0xea956ae5), TOBN(0xde2bcbf6, 0x95581718), TOBN(0xb5c55df0, 0x6f4c52c9), TOBN(0x9b2783a2, 0xec07a28f), TOBN(0xe39e772c, 0x180e8603), TOBN(0x32905e46, 0x2e36ce3b), TOBN(0xf1746c08, 0xca18217c), TOBN(0x670c354e, 0x4abc9804), TOBN(0x9ed52907, 0x7096966d), TOBN(0x1c62f356, 0x208552bb), TOBN(0x83655d23, 0xdca3ad96), TOBN(0x69163fa8, 0xfd24cf5f), TOBN(0x98da4836, 0x1c55d39a), TOBN(0xc2007cb8, 0xa163bf05), TOBN(0x49286651, 0xece45b3d), TOBN(0xae9f2411, 0x7c4b1fe6), TOBN(0xee386bfb, 0x5a899fa5), TOBN(0x0bff5cb6, 0xf406b7ed), TOBN(0xf44c42e9, 0xa637ed6b), TOBN(0xe485b576, 0x625e7ec6), TOBN(0x4fe1356d, 0x6d51c245), TOBN(0x302b0a6d, 0xf25f1437), TOBN(0xef9519b3, 0xcd3a431b), TOBN(0x514a0879, 0x8e3404dd), TOBN(0x020bbea6, 0x3b139b22), TOBN(0x29024e08, 0x8a67cc74), TOBN(0xc4c6628b, 0x80dc1cd1), TOBN(0xc90fdaa2, 0x2168c234), TOBN(0xffffffff, 0xffffffff), }; return get_params(ret, kWords); } BIGNUM *BN_get_rfc3526_prime_3072(BIGNUM *ret) { static const BN_ULONG kWords[] = { TOBN(0xffffffff, 0xffffffff), TOBN(0x4b82d120, 0xa93ad2ca), TOBN(0x43db5bfc, 0xe0fd108e), TOBN(0x08e24fa0, 0x74e5ab31), TOBN(0x770988c0, 0xbad946e2), TOBN(0xbbe11757, 0x7a615d6c), TOBN(0x521f2b18, 0x177b200c), TOBN(0xd8760273, 0x3ec86a64), TOBN(0xf12ffa06, 0xd98a0864), TOBN(0xcee3d226, 0x1ad2ee6b), TOBN(0x1e8c94e0, 0x4a25619d), TOBN(0xabf5ae8c, 0xdb0933d7), TOBN(0xb3970f85, 0xa6e1e4c7), TOBN(0x8aea7157, 0x5d060c7d), TOBN(0xecfb8504, 0x58dbef0a), TOBN(0xa85521ab, 0xdf1cba64), TOBN(0xad33170d, 0x04507a33), TOBN(0x15728e5a, 0x8aaac42d), TOBN(0x15d22618, 0x98fa0510), TOBN(0x3995497c, 0xea956ae5), TOBN(0xde2bcbf6, 0x95581718), TOBN(0xb5c55df0, 0x6f4c52c9), TOBN(0x9b2783a2, 0xec07a28f), TOBN(0xe39e772c, 0x180e8603), TOBN(0x32905e46, 0x2e36ce3b), TOBN(0xf1746c08, 0xca18217c), TOBN(0x670c354e, 0x4abc9804), TOBN(0x9ed52907, 0x7096966d), TOBN(0x1c62f356, 0x208552bb), TOBN(0x83655d23, 0xdca3ad96), TOBN(0x69163fa8, 0xfd24cf5f), TOBN(0x98da4836, 0x1c55d39a), TOBN(0xc2007cb8, 0xa163bf05), TOBN(0x49286651, 0xece45b3d), TOBN(0xae9f2411, 0x7c4b1fe6), TOBN(0xee386bfb, 0x5a899fa5), TOBN(0x0bff5cb6, 0xf406b7ed), TOBN(0xf44c42e9, 0xa637ed6b), TOBN(0xe485b576, 0x625e7ec6), TOBN(0x4fe1356d, 0x6d51c245), TOBN(0x302b0a6d, 0xf25f1437), TOBN(0xef9519b3, 0xcd3a431b), TOBN(0x514a0879, 0x8e3404dd), TOBN(0x020bbea6, 0x3b139b22), TOBN(0x29024e08, 0x8a67cc74), TOBN(0xc4c6628b, 0x80dc1cd1), TOBN(0xc90fdaa2, 0x2168c234), TOBN(0xffffffff, 0xffffffff), }; return get_params(ret, kWords); } BIGNUM *BN_get_rfc3526_prime_4096(BIGNUM *ret) { static const BN_ULONG kWords[] = { TOBN(0xffffffff, 0xffffffff), TOBN(0x4df435c9, 0x34063199), TOBN(0x86ffb7dc, 0x90a6c08f), TOBN(0x93b4ea98, 0x8d8fddc1), TOBN(0xd0069127, 0xd5b05aa9), TOBN(0xb81bdd76, 0x2170481c), TOBN(0x1f612970, 0xcee2d7af), TOBN(0x233ba186, 0x515be7ed), TOBN(0x99b2964f, 0xa090c3a2), TOBN(0x287c5947, 0x4e6bc05d), TOBN(0x2e8efc14, 0x1fbecaa6), TOBN(0xdbbbc2db, 0x04de8ef9), TOBN(0x2583e9ca, 0x2ad44ce8), TOBN(0x1a946834, 0xb6150bda), TOBN(0x99c32718, 0x6af4e23c), TOBN(0x88719a10, 0xbdba5b26), TOBN(0x1a723c12, 0xa787e6d7), TOBN(0x4b82d120, 0xa9210801), TOBN(0x43db5bfc, 0xe0fd108e), TOBN(0x08e24fa0, 0x74e5ab31), TOBN(0x770988c0, 0xbad946e2), TOBN(0xbbe11757, 0x7a615d6c), TOBN(0x521f2b18, 0x177b200c), TOBN(0xd8760273, 0x3ec86a64), TOBN(0xf12ffa06, 0xd98a0864), TOBN(0xcee3d226, 0x1ad2ee6b), TOBN(0x1e8c94e0, 0x4a25619d), TOBN(0xabf5ae8c, 0xdb0933d7), TOBN(0xb3970f85, 0xa6e1e4c7), TOBN(0x8aea7157, 0x5d060c7d), TOBN(0xecfb8504, 0x58dbef0a), TOBN(0xa85521ab, 0xdf1cba64), TOBN(0xad33170d, 0x04507a33), TOBN(0x15728e5a, 0x8aaac42d), TOBN(0x15d22618, 0x98fa0510), TOBN(0x3995497c, 0xea956ae5), TOBN(0xde2bcbf6, 0x95581718), TOBN(0xb5c55df0, 0x6f4c52c9), TOBN(0x9b2783a2, 0xec07a28f), TOBN(0xe39e772c, 0x180e8603), TOBN(0x32905e46, 0x2e36ce3b), TOBN(0xf1746c08, 0xca18217c), TOBN(0x670c354e, 0x4abc9804), TOBN(0x9ed52907, 0x7096966d), TOBN(0x1c62f356, 0x208552bb), TOBN(0x83655d23, 0xdca3ad96), TOBN(0x69163fa8, 0xfd24cf5f), TOBN(0x98da4836, 0x1c55d39a), TOBN(0xc2007cb8, 0xa163bf05), TOBN(0x49286651, 0xece45b3d), TOBN(0xae9f2411, 0x7c4b1fe6), TOBN(0xee386bfb, 0x5a899fa5), TOBN(0x0bff5cb6, 0xf406b7ed), TOBN(0xf44c42e9, 0xa637ed6b), TOBN(0xe485b576, 0x625e7ec6), TOBN(0x4fe1356d, 0x6d51c245), TOBN(0x302b0a6d, 0xf25f1437), TOBN(0xef9519b3, 0xcd3a431b), TOBN(0x514a0879, 0x8e3404dd), TOBN(0x020bbea6, 0x3b139b22), TOBN(0x29024e08, 0x8a67cc74), TOBN(0xc4c6628b, 0x80dc1cd1), TOBN(0xc90fdaa2, 0x2168c234), TOBN(0xffffffff, 0xffffffff), }; return get_params(ret, kWords); } BIGNUM *BN_get_rfc3526_prime_6144(BIGNUM *ret) { static const BN_ULONG kWords[] = { TOBN(0xffffffff, 0xffffffff), TOBN(0xe694f91e, 0x6dcc4024), TOBN(0x12bf2d5b, 0x0b7474d6), TOBN(0x043e8f66, 0x3f4860ee), TOBN(0x387fe8d7, 0x6e3c0468), TOBN(0xda56c9ec, 0x2ef29632), TOBN(0xeb19ccb1, 0xa313d55c), TOBN(0xf550aa3d, 0x8a1fbff0), TOBN(0x06a1d58b, 0xb7c5da76), TOBN(0xa79715ee, 0xf29be328), TOBN(0x14cc5ed2, 0x0f8037e0), TOBN(0xcc8f6d7e, 0xbf48e1d8), TOBN(0x4bd407b2, 0x2b4154aa), TOBN(0x0f1d45b7, 0xff585ac5), TOBN(0x23a97a7e, 0x36cc88be), TOBN(0x59e7c97f, 0xbec7e8f3), TOBN(0xb5a84031, 0x900b1c9e), TOBN(0xd55e702f, 0x46980c82), TOBN(0xf482d7ce, 0x6e74fef6), TOBN(0xf032ea15, 0xd1721d03), TOBN(0x5983ca01, 0xc64b92ec), TOBN(0x6fb8f401, 0x378cd2bf), TOBN(0x33205151, 0x2bd7af42), TOBN(0xdb7f1447, 0xe6cc254b), TOBN(0x44ce6cba, 0xced4bb1b), TOBN(0xda3edbeb, 0xcf9b14ed), TOBN(0x179727b0, 0x865a8918), TOBN(0xb06a53ed, 0x9027d831), TOBN(0xe5db382f, 0x413001ae), TOBN(0xf8ff9406, 0xad9e530e), TOBN(0xc9751e76, 0x3dba37bd), TOBN(0xc1d4dcb2, 0x602646de), TOBN(0x36c3fab4, 0xd27c7026), TOBN(0x4df435c9, 0x34028492), TOBN(0x86ffb7dc, 0x90a6c08f), TOBN(0x93b4ea98, 0x8d8fddc1), TOBN(0xd0069127, 0xd5b05aa9), TOBN(0xb81bdd76, 0x2170481c), TOBN(0x1f612970, 0xcee2d7af), TOBN(0x233ba186, 0x515be7ed), TOBN(0x99b2964f, 0xa090c3a2), TOBN(0x287c5947, 0x4e6bc05d), TOBN(0x2e8efc14, 0x1fbecaa6), TOBN(0xdbbbc2db, 0x04de8ef9), TOBN(0x2583e9ca, 0x2ad44ce8), TOBN(0x1a946834, 0xb6150bda), TOBN(0x99c32718, 0x6af4e23c), TOBN(0x88719a10, 0xbdba5b26), TOBN(0x1a723c12, 0xa787e6d7), TOBN(0x4b82d120, 0xa9210801), TOBN(0x43db5bfc, 0xe0fd108e), TOBN(0x08e24fa0, 0x74e5ab31), TOBN(0x770988c0, 0xbad946e2), TOBN(0xbbe11757, 0x7a615d6c), TOBN(0x521f2b18, 0x177b200c), TOBN(0xd8760273, 0x3ec86a64), TOBN(0xf12ffa06, 0xd98a0864), TOBN(0xcee3d226, 0x1ad2ee6b), TOBN(0x1e8c94e0, 0x4a25619d), TOBN(0xabf5ae8c, 0xdb0933d7), TOBN(0xb3970f85, 0xa6e1e4c7), TOBN(0x8aea7157, 0x5d060c7d), TOBN(0xecfb8504, 0x58dbef0a), TOBN(0xa85521ab, 0xdf1cba64), TOBN(0xad33170d, 0x04507a33), TOBN(0x15728e5a, 0x8aaac42d), TOBN(0x15d22618, 0x98fa0510), TOBN(0x3995497c, 0xea956ae5), TOBN(0xde2bcbf6, 0x95581718), TOBN(0xb5c55df0, 0x6f4c52c9), TOBN(0x9b2783a2, 0xec07a28f), TOBN(0xe39e772c, 0x180e8603), TOBN(0x32905e46, 0x2e36ce3b), TOBN(0xf1746c08, 0xca18217c), TOBN(0x670c354e, 0x4abc9804), TOBN(0x9ed52907, 0x7096966d), TOBN(0x1c62f356, 0x208552bb), TOBN(0x83655d23, 0xdca3ad96), TOBN(0x69163fa8, 0xfd24cf5f), TOBN(0x98da4836, 0x1c55d39a), TOBN(0xc2007cb8, 0xa163bf05), TOBN(0x49286651, 0xece45b3d), TOBN(0xae9f2411, 0x7c4b1fe6), TOBN(0xee386bfb, 0x5a899fa5), TOBN(0x0bff5cb6, 0xf406b7ed), TOBN(0xf44c42e9, 0xa637ed6b), TOBN(0xe485b576, 0x625e7ec6), TOBN(0x4fe1356d, 0x6d51c245), TOBN(0x302b0a6d, 0xf25f1437), TOBN(0xef9519b3, 0xcd3a431b), TOBN(0x514a0879, 0x8e3404dd), TOBN(0x020bbea6, 0x3b139b22), TOBN(0x29024e08, 0x8a67cc74), TOBN(0xc4c6628b, 0x80dc1cd1), TOBN(0xc90fdaa2, 0x2168c234), TOBN(0xffffffff, 0xffffffff), }; return get_params(ret, kWords); } BIGNUM *BN_get_rfc3526_prime_8192(BIGNUM *ret) { static const BN_ULONG kWords[] = { TOBN(0xffffffff, 0xffffffff), TOBN(0x60c980dd, 0x98edd3df), TOBN(0xc81f56e8, 0x80b96e71), TOBN(0x9e3050e2, 0x765694df), TOBN(0x9558e447, 0x5677e9aa), TOBN(0xc9190da6, 0xfc026e47), TOBN(0x889a002e, 0xd5ee382b), TOBN(0x4009438b, 0x481c6cd7), TOBN(0x359046f4, 0xeb879f92), TOBN(0xfaf36bc3, 0x1ecfa268), TOBN(0xb1d510bd, 0x7ee74d73), TOBN(0xf9ab4819, 0x5ded7ea1), TOBN(0x64f31cc5, 0x0846851d), TOBN(0x4597e899, 0xa0255dc1), TOBN(0xdf310ee0, 0x74ab6a36), TOBN(0x6d2a13f8, 0x3f44f82d), TOBN(0x062b3cf5, 0xb3a278a6), TOBN(0x79683303, 0xed5bdd3a), TOBN(0xfa9d4b7f, 0xa2c087e8), TOBN(0x4bcbc886, 0x2f8385dd), TOBN(0x3473fc64, 0x6cea306b), TOBN(0x13eb57a8, 0x1a23f0c7), TOBN(0x22222e04, 0xa4037c07), TOBN(0xe3fdb8be, 0xfc848ad9), TOBN(0x238f16cb, 0xe39d652d), TOBN(0x3423b474, 0x2bf1c978), TOBN(0x3aab639c, 0x5ae4f568), TOBN(0x2576f693, 0x6ba42466), TOBN(0x741fa7bf, 0x8afc47ed), TOBN(0x3bc832b6, 0x8d9dd300), TOBN(0xd8bec4d0, 0x73b931ba), TOBN(0x38777cb6, 0xa932df8c), TOBN(0x74a3926f, 0x12fee5e4), TOBN(0xe694f91e, 0x6dbe1159), TOBN(0x12bf2d5b, 0x0b7474d6), TOBN(0x043e8f66, 0x3f4860ee), TOBN(0x387fe8d7, 0x6e3c0468), TOBN(0xda56c9ec, 0x2ef29632), TOBN(0xeb19ccb1, 0xa313d55c), TOBN(0xf550aa3d, 0x8a1fbff0), TOBN(0x06a1d58b, 0xb7c5da76), TOBN(0xa79715ee, 0xf29be328), TOBN(0x14cc5ed2, 0x0f8037e0), TOBN(0xcc8f6d7e, 0xbf48e1d8), TOBN(0x4bd407b2, 0x2b4154aa), TOBN(0x0f1d45b7, 0xff585ac5), TOBN(0x23a97a7e, 0x36cc88be), TOBN(0x59e7c97f, 0xbec7e8f3), TOBN(0xb5a84031, 0x900b1c9e), TOBN(0xd55e702f, 0x46980c82), TOBN(0xf482d7ce, 0x6e74fef6), TOBN(0xf032ea15, 0xd1721d03), TOBN(0x5983ca01, 0xc64b92ec), TOBN(0x6fb8f401, 0x378cd2bf), TOBN(0x33205151, 0x2bd7af42), TOBN(0xdb7f1447, 0xe6cc254b), TOBN(0x44ce6cba, 0xced4bb1b), TOBN(0xda3edbeb, 0xcf9b14ed), TOBN(0x179727b0, 0x865a8918), TOBN(0xb06a53ed, 0x9027d831), TOBN(0xe5db382f, 0x413001ae), TOBN(0xf8ff9406, 0xad9e530e), TOBN(0xc9751e76, 0x3dba37bd), TOBN(0xc1d4dcb2, 0x602646de), TOBN(0x36c3fab4, 0xd27c7026), TOBN(0x4df435c9, 0x34028492), TOBN(0x86ffb7dc, 0x90a6c08f), TOBN(0x93b4ea98, 0x8d8fddc1), TOBN(0xd0069127, 0xd5b05aa9), TOBN(0xb81bdd76, 0x2170481c), TOBN(0x1f612970, 0xcee2d7af), TOBN(0x233ba186, 0x515be7ed), TOBN(0x99b2964f, 0xa090c3a2), TOBN(0x287c5947, 0x4e6bc05d), TOBN(0x2e8efc14, 0x1fbecaa6), TOBN(0xdbbbc2db, 0x04de8ef9), TOBN(0x2583e9ca, 0x2ad44ce8), TOBN(0x1a946834, 0xb6150bda), TOBN(0x99c32718, 0x6af4e23c), TOBN(0x88719a10, 0xbdba5b26), TOBN(0x1a723c12, 0xa787e6d7), TOBN(0x4b82d120, 0xa9210801), TOBN(0x43db5bfc, 0xe0fd108e), TOBN(0x08e24fa0, 0x74e5ab31), TOBN(0x770988c0, 0xbad946e2), TOBN(0xbbe11757, 0x7a615d6c), TOBN(0x521f2b18, 0x177b200c), TOBN(0xd8760273, 0x3ec86a64), TOBN(0xf12ffa06, 0xd98a0864), TOBN(0xcee3d226, 0x1ad2ee6b), TOBN(0x1e8c94e0, 0x4a25619d), TOBN(0xabf5ae8c, 0xdb0933d7), TOBN(0xb3970f85, 0xa6e1e4c7), TOBN(0x8aea7157, 0x5d060c7d), TOBN(0xecfb8504, 0x58dbef0a), TOBN(0xa85521ab, 0xdf1cba64), TOBN(0xad33170d, 0x04507a33), TOBN(0x15728e5a, 0x8aaac42d), TOBN(0x15d22618, 0x98fa0510), TOBN(0x3995497c, 0xea956ae5), TOBN(0xde2bcbf6, 0x95581718), TOBN(0xb5c55df0, 0x6f4c52c9), TOBN(0x9b2783a2, 0xec07a28f), TOBN(0xe39e772c, 0x180e8603), TOBN(0x32905e46, 0x2e36ce3b), TOBN(0xf1746c08, 0xca18217c), TOBN(0x670c354e, 0x4abc9804), TOBN(0x9ed52907, 0x7096966d), TOBN(0x1c62f356, 0x208552bb), TOBN(0x83655d23, 0xdca3ad96), TOBN(0x69163fa8, 0xfd24cf5f), TOBN(0x98da4836, 0x1c55d39a), TOBN(0xc2007cb8, 0xa163bf05), TOBN(0x49286651, 0xece45b3d), TOBN(0xae9f2411, 0x7c4b1fe6), TOBN(0xee386bfb, 0x5a899fa5), TOBN(0x0bff5cb6, 0xf406b7ed), TOBN(0xf44c42e9, 0xa637ed6b), TOBN(0xe485b576, 0x625e7ec6), TOBN(0x4fe1356d, 0x6d51c245), TOBN(0x302b0a6d, 0xf25f1437), TOBN(0xef9519b3, 0xcd3a431b), TOBN(0x514a0879, 0x8e3404dd), TOBN(0x020bbea6, 0x3b139b22), TOBN(0x29024e08, 0x8a67cc74), TOBN(0xc4c6628b, 0x80dc1cd1), TOBN(0xc90fdaa2, 0x2168c234), TOBN(0xffffffff, 0xffffffff), }; return get_params(ret, kWords); } int DH_generate_parameters_ex(DH *dh, int prime_bits, int generator, BN_GENCB *cb) { // We generate DH parameters as follows // find a prime q which is prime_bits/2 bits long. // p=(2*q)+1 or (p-1)/2 = q // For this case, g is a generator if // g^((p-1)/q) mod p != 1 for values of q which are the factors of p-1. // Since the factors of p-1 are q and 2, we just need to check // g^2 mod p != 1 and g^q mod p != 1. // // Having said all that, // there is another special case method for the generators 2, 3 and 5. // for 2, p mod 24 == 11 // for 3, p mod 12 == 5 <<<<< does not work for safe primes. // for 5, p mod 10 == 3 or 7 // // Thanks to Phil Karn for the pointers about the // special generators and for answering some of my questions. // // I've implemented the second simple method :-). // Since DH should be using a safe prime (both p and q are prime), // this generator function can take a very very long time to run. // Actually there is no reason to insist that 'generator' be a generator. // It's just as OK (and in some sense better) to use a generator of the // order-q subgroup. if (prime_bits <= 0 || prime_bits > OPENSSL_DH_MAX_MODULUS_BITS) { OPENSSL_PUT_ERROR(DH, DH_R_MODULUS_TOO_LARGE); return 0; } // Make sure |dh| has the necessary elements if (dh->p == nullptr) { dh->p = BN_new(); if (dh->p == nullptr) { OPENSSL_PUT_ERROR(DH, ERR_R_BN_LIB); return 0; } } if (dh->g == nullptr) { dh->g = BN_new(); if (dh->g == nullptr) { OPENSSL_PUT_ERROR(DH, ERR_R_BN_LIB); return 0; } } BN_ULONG t1, t2, g; if (generator <= 1) { OPENSSL_PUT_ERROR(DH, DH_R_BAD_GENERATOR); return 0; } if (generator == DH_GENERATOR_2) { t1 = 24; t2 = 11; g = 2; } else if (generator == DH_GENERATOR_5) { t1 = 10; t2 = 3; g = 5; } else { // In the general case, don't worry if 'generator' is a generator or not: // since we are using safe primes, it will generate either an order-q or an // order-2q group, which both is OK. t1 = 2; t2 = 1; g = generator; } bssl::UniquePtr t1_bn(BN_new()), t2_bn(BN_new()); if (t1_bn == nullptr || t2_bn == nullptr || !BN_set_word(t1_bn.get(), t1) || // !BN_set_word(t2_bn.get(), t2) || // !BN_generate_prime_ex(dh->p, prime_bits, 1, t1_bn.get(), t2_bn.get(), cb) || !BN_GENCB_call(cb, 3, 0) || // !BN_set_word(dh->g, g)) { OPENSSL_PUT_ERROR(DH, ERR_R_BN_LIB); return 0; } return 1; } static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) { BIGNUM *a = nullptr; if (src) { a = BN_dup(src); if (!a) { return 0; } } BN_free(*dst); *dst = a; return 1; } static int int_dh_param_copy(DH *to, const DH *from, int is_x942) { if (is_x942 == -1) { is_x942 = !!from->q; } if (!int_dh_bn_cpy(&to->p, from->p) || !int_dh_bn_cpy(&to->g, from->g)) { return 0; } if (!is_x942) { return 1; } if (!int_dh_bn_cpy(&to->q, from->q)) { return 0; } return 1; } DH *DHparams_dup(const DH *dh) { DH *ret = DH_new(); if (!ret) { return nullptr; } if (!int_dh_param_copy(ret, dh, -1)) { DH_free(ret); return nullptr; } return ret; }