Mercurial > dropbear
view libtomcrypt/src/pk/dsa/dsa_set_pqg_dsaparam.c @ 1831:0a3d02c66bf6
Comment on reason for DROPBEAR_MAX_PASSWORD_LEN limit
author | Matt Johnston <matt@codeconstruct.com.au> |
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date | Tue, 12 Oct 2021 21:29:25 +0800 |
parents | 6dba84798cd5 |
children |
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. */ #include "tomcrypt.h" #ifdef LTC_MDSA /** Import DSA's p, q & g from dsaparam dsaparam data: openssl dsaparam -outform DER -out dsaparam.der 2048 @param dsaparam The DSA param DER encoded data @param dsaparamlen The length of dhparam data @param key [out] the destination for the imported key @return CRYPT_OK if successful. */ int dsa_set_pqg_dsaparam(const unsigned char *dsaparam, unsigned long dsaparamlen, dsa_key *key) { int err, stat; LTC_ARGCHK(dsaparam != NULL); LTC_ARGCHK(key != NULL); LTC_ARGCHK(ltc_mp.name != NULL); /* init key */ err = mp_init_multi(&key->p, &key->g, &key->q, &key->x, &key->y, NULL); if (err != CRYPT_OK) return err; if ((err = der_decode_sequence_multi(dsaparam, dsaparamlen, LTC_ASN1_INTEGER, 1UL, key->p, LTC_ASN1_INTEGER, 1UL, key->q, LTC_ASN1_INTEGER, 1UL, key->g, LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) { goto LBL_ERR; } key->qord = mp_unsigned_bin_size(key->q); /* quick p, q, g validation, without primality testing */ if ((err = dsa_int_validate_pqg(key, &stat)) != CRYPT_OK) { goto LBL_ERR; } if (stat == 0) { err = CRYPT_INVALID_PACKET; goto LBL_ERR; } return CRYPT_OK; LBL_ERR: dsa_free(key); return err; } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */