diff options
Diffstat (limited to 'core/lib/libtomcrypt/src/pk/rsa/rsa_import.c')
| -rw-r--r-- | core/lib/libtomcrypt/src/pk/rsa/rsa_import.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/core/lib/libtomcrypt/src/pk/rsa/rsa_import.c b/core/lib/libtomcrypt/src/pk/rsa/rsa_import.c new file mode 100644 index 0000000..7975d2a --- /dev/null +++ b/core/lib/libtomcrypt/src/pk/rsa/rsa_import.c @@ -0,0 +1,157 @@ +/* + * Copyright (c) 2001-2007, Tom St Denis + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* 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. + * + * Tom St Denis, tomstdenis@gmail.com, http://libtom.org + */ +#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 = MAX_RSA_SIZE * 8; + 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 */ + if ((err = der_decode_sequence_multi(in, inlen, + LTC_ASN1_INTEGER, 1UL, key->N, + LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) { + 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 */ + + +/* $Source: /cvs/libtom/libtomcrypt/src/pk/rsa/rsa_import.c,v $ */ +/* $Revision: 1.23 $ */ +/* $Date: 2007/05/12 14:32:35 $ */ |