Mercurial > dropbear
view libtomcrypt/src/pk/rsa/rsa_import.c @ 1693:f9ad4d39e388
Bring back -Werror and improve travis tests
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Tue, 26 May 2020 23:53:50 +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" /** @file rsa_import.c Import a PKCS RSA key, Tom St Denis */ #ifdef LTC_MRSA /** Import an RSAPublicKey or RSAPrivateKey [two-prime only, only support >= 1024-bit keys, defined in PKCS #1 v2.1] @param in The packet to import from @param inlen It's length (octets) @param key [out] Destination for newly imported key @return CRYPT_OK if successful, upon error allocated memory is freed */ int rsa_import(const unsigned char *in, unsigned long inlen, rsa_key *key) { int err; void *zero; unsigned char *tmpbuf=NULL; unsigned long tmpbuf_len; LTC_ARGCHK(in != NULL); LTC_ARGCHK(key != NULL); LTC_ARGCHK(ltc_mp.name != NULL); /* init key */ if ((err = mp_init_multi(&key->e, &key->d, &key->N, &key->dQ, &key->dP, &key->qP, &key->p, &key->q, NULL)) != CRYPT_OK) { return err; } /* see if the OpenSSL DER format RSA public key will work */ tmpbuf_len = inlen; tmpbuf = XCALLOC(1, tmpbuf_len); if (tmpbuf == NULL) { err = CRYPT_MEM; goto LBL_ERR; } err = der_decode_subject_public_key_info(in, inlen, PKA_RSA, tmpbuf, &tmpbuf_len, LTC_ASN1_NULL, NULL, 0); if (err == CRYPT_OK) { /* SubjectPublicKeyInfo format */ /* now it should be SEQUENCE { INTEGER, INTEGER } */ if ((err = der_decode_sequence_multi(tmpbuf, tmpbuf_len, LTC_ASN1_INTEGER, 1UL, key->N, LTC_ASN1_INTEGER, 1UL, key->e, LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) { goto LBL_ERR; } key->type = PK_PUBLIC; err = CRYPT_OK; goto LBL_FREE; } /* not SSL public key, try to match against PKCS #1 standards */ err = der_decode_sequence_multi(in, inlen, LTC_ASN1_INTEGER, 1UL, key->N, LTC_ASN1_EOL, 0UL, NULL); if (err != CRYPT_OK && err != CRYPT_INPUT_TOO_LONG) { goto LBL_ERR; } if (mp_cmp_d(key->N, 0) == LTC_MP_EQ) { if ((err = mp_init(&zero)) != CRYPT_OK) { goto LBL_ERR; } /* it's a private key */ if ((err = der_decode_sequence_multi(in, inlen, LTC_ASN1_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)) != CRYPT_OK) { mp_clear(zero); goto LBL_ERR; } mp_clear(zero); key->type = PK_PRIVATE; } else if (mp_cmp_d(key->N, 1) == LTC_MP_EQ) { /* we don't support multi-prime RSA */ err = CRYPT_PK_INVALID_TYPE; goto LBL_ERR; } else { /* it's a public key and we lack e */ if ((err = der_decode_sequence_multi(in, inlen, LTC_ASN1_INTEGER, 1UL, key->N, LTC_ASN1_INTEGER, 1UL, key->e, LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) { goto LBL_ERR; } key->type = PK_PUBLIC; } err = CRYPT_OK; goto LBL_FREE; LBL_ERR: mp_clear_multi(key->d, key->e, key->N, key->dQ, key->dP, key->qP, key->p, key->q, NULL); LBL_FREE: if (tmpbuf != NULL) XFREE(tmpbuf); return err; } #endif /* LTC_MRSA */ /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */