Mercurial > dropbear
view libtomcrypt/src/pk/rsa/rsa_export.c @ 1693:f9ad4d39e388
Bring back -Werror and improve travis tests
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 26 May 2020 23:53:50 +0800 |
parents | 6dba84798cd5 |
children | e9dba7abd939 |
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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" /** @file rsa_export.c Export RSA PKCS keys, Tom St Denis */ #ifdef LTC_MRSA /** This will export either an RSAPublicKey or RSAPrivateKey [defined in PKCS #1 v2.1] @param out [out] Destination of the packet @param outlen [in/out] The max size and resulting size of the packet @param type The type of exported key (PK_PRIVATE or PK_PUBLIC) @param key The RSA key to export @return CRYPT_OK if successful */ int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key) { unsigned long zero=0; int err; LTC_ARGCHK(out != NULL); LTC_ARGCHK(outlen != NULL); LTC_ARGCHK(key != NULL); /* type valid? */ if (!(key->type == PK_PRIVATE) && (type == PK_PRIVATE)) { return CRYPT_PK_INVALID_TYPE; } if (type == PK_PRIVATE) { /* private key */ /* output is Version, n, e, d, p, q, d mod (p-1), d mod (q - 1), 1/q mod p */ return der_encode_sequence_multi(out, outlen, LTC_ASN1_SHORT_INTEGER, 1UL, &zero, LTC_ASN1_INTEGER, 1UL, key->N, LTC_ASN1_INTEGER, 1UL, key->e, LTC_ASN1_INTEGER, 1UL, key->d, LTC_ASN1_INTEGER, 1UL, key->p, LTC_ASN1_INTEGER, 1UL, key->q, LTC_ASN1_INTEGER, 1UL, key->dP, LTC_ASN1_INTEGER, 1UL, key->dQ, LTC_ASN1_INTEGER, 1UL, key->qP, LTC_ASN1_EOL, 0UL, NULL); } else { /* public key */ unsigned long tmplen, *ptmplen; unsigned char* tmp = NULL; if (type & PK_STD) { tmplen = (mp_count_bits(key->N)/8)*2+8; tmp = XMALLOC(tmplen); ptmplen = &tmplen; if (tmp == NULL) { return CRYPT_MEM; } } else { tmp = out; ptmplen = outlen; } err = der_encode_sequence_multi(tmp, ptmplen, LTC_ASN1_INTEGER, 1UL, key->N, LTC_ASN1_INTEGER, 1UL, key->e, LTC_ASN1_EOL, 0UL, NULL); if ((err != CRYPT_OK) || !(type & PK_STD)) { goto finish; } err = der_encode_subject_public_key_info(out, outlen, PKA_RSA, tmp, tmplen, LTC_ASN1_NULL, NULL, 0); finish: if (tmp != out) XFREE(tmp); return err; } } #endif /* LTC_MRSA */ /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */