x_pubkey.c
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上传日期:2020-08-09
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- /* crypto/asn1/x_pubkey.c */
- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
- #include <stdio.h>
- #include "cryptlib.h"
- #include <openssl/asn1t.h>
- #include <openssl/x509.h>
- #ifndef OPENSSL_NO_RSA
- #include <openssl/rsa.h>
- #endif
- #ifndef OPENSSL_NO_DSA
- #include <openssl/dsa.h>
- #endif
- /* Minor tweak to operation: free up EVP_PKEY */
- static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
- {
- if (operation == ASN1_OP_FREE_POST)
- {
- X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
- EVP_PKEY_free(pubkey->pkey);
- }
- return 1;
- }
- ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
- ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
- ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
- } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
- IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
- int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
- {
- X509_PUBKEY *pk=NULL;
- X509_ALGOR *a;
- ASN1_OBJECT *o;
- unsigned char *s,*p = NULL;
- int i;
- if (x == NULL) return(0);
- if ((pk=X509_PUBKEY_new()) == NULL) goto err;
- a=pk->algor;
- /* set the algorithm id */
- if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
- ASN1_OBJECT_free(a->algorithm);
- a->algorithm=o;
- /* Set the parameter list */
- if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
- {
- if ((a->parameter == NULL) ||
- (a->parameter->type != V_ASN1_NULL))
- {
- ASN1_TYPE_free(a->parameter);
- if (!(a->parameter=ASN1_TYPE_new()))
- {
- X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- a->parameter->type=V_ASN1_NULL;
- }
- }
- #ifndef OPENSSL_NO_DSA
- else if (pkey->type == EVP_PKEY_DSA)
- {
- unsigned char *pp;
- DSA *dsa;
-
- dsa=pkey->pkey.dsa;
- dsa->write_params=0;
- ASN1_TYPE_free(a->parameter);
- if ((i=i2d_DSAparams(dsa,NULL)) <= 0)
- goto err;
- if (!(p=(unsigned char *)OPENSSL_malloc(i)))
- {
- X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- pp=p;
- i2d_DSAparams(dsa,&pp);
- if (!(a->parameter=ASN1_TYPE_new()))
- {
- OPENSSL_free(p);
- X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- a->parameter->type=V_ASN1_SEQUENCE;
- if (!(a->parameter->value.sequence=ASN1_STRING_new()))
- {
- OPENSSL_free(p);
- X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- if (!ASN1_STRING_set(a->parameter->value.sequence,p,i))
- {
- OPENSSL_free(p);
- X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- OPENSSL_free(p);
- }
- #endif
- #ifndef OPENSSL_NO_EC
- else if (pkey->type == EVP_PKEY_EC)
- {
- int nid=0;
- unsigned char *pp;
- EC_KEY *ec_key;
- const EC_GROUP *group;
-
- ec_key = pkey->pkey.ec;
- ASN1_TYPE_free(a->parameter);
- if ((a->parameter = ASN1_TYPE_new()) == NULL)
- {
- X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
- goto err;
- }
- group = EC_KEY_get0_group(ec_key);
- if (EC_GROUP_get_asn1_flag(group)
- && (nid = EC_GROUP_get_curve_name(group)))
- {
- /* just set the OID */
- a->parameter->type = V_ASN1_OBJECT;
- a->parameter->value.object = OBJ_nid2obj(nid);
- }
- else /* explicit parameters */
- {
- if ((i = i2d_ECParameters(ec_key, NULL)) == 0)
- {
- X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
- goto err;
- }
- if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
- {
- X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- pp = p;
- if (!i2d_ECParameters(ec_key, &pp))
- {
- X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
- OPENSSL_free(p);
- goto err;
- }
- a->parameter->type = V_ASN1_SEQUENCE;
- if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
- {
- X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
- OPENSSL_free(p);
- goto err;
- }
- ASN1_STRING_set(a->parameter->value.sequence, p, i);
- OPENSSL_free(p);
- }
- }
- #endif
- else if (1)
- {
- X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
- goto err;
- }
- if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
- if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
- {
- X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- p=s;
- i2d_PublicKey(pkey,&p);
- if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i))
- {
- X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- /* Set number of unused bits to zero */
- pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
- pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
- OPENSSL_free(s);
- #if 0
- CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
- pk->pkey=pkey;
- #endif
- if (*x != NULL)
- X509_PUBKEY_free(*x);
- *x=pk;
- return 1;
- err:
- if (pk != NULL) X509_PUBKEY_free(pk);
- return 0;
- }
- EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
- {
- EVP_PKEY *ret=NULL;
- long j;
- int type;
- const unsigned char *p;
- #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
- const unsigned char *cp;
- X509_ALGOR *a;
- #endif
- if (key == NULL) goto err;
- if (key->pkey != NULL)
- {
- CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
- return(key->pkey);
- }
- if (key->public_key == NULL) goto err;
- type=OBJ_obj2nid(key->algor->algorithm);
- if ((ret = EVP_PKEY_new()) == NULL)
- {
- X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- ret->type = EVP_PKEY_type(type);
- /* the parameters must be extracted before the public key (ECDSA!) */
-
- #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
- a=key->algor;
- #endif
- if (0)
- ;
- #ifndef OPENSSL_NO_DSA
- else if (ret->type == EVP_PKEY_DSA)
- {
- if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
- {
- if ((ret->pkey.dsa = DSA_new()) == NULL)
- {
- X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- ret->pkey.dsa->write_params=0;
- cp=p=a->parameter->value.sequence->data;
- j=a->parameter->value.sequence->length;
- if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j))
- goto err;
- }
- ret->save_parameters=1;
- }
- #endif
- #ifndef OPENSSL_NO_EC
- else if (ret->type == EVP_PKEY_EC)
- {
- if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
- {
- /* type == V_ASN1_SEQUENCE => we have explicit parameters
- * (e.g. parameters in the X9_62_EC_PARAMETERS-structure )
- */
- if ((ret->pkey.ec= EC_KEY_new()) == NULL)
- {
- X509err(X509_F_X509_PUBKEY_GET,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
- cp = p = a->parameter->value.sequence->data;
- j = a->parameter->value.sequence->length;
- if (!d2i_ECParameters(&ret->pkey.ec, &cp, (long)j))
- {
- X509err(X509_F_X509_PUBKEY_GET, ERR_R_EC_LIB);
- goto err;
- }
- }
- else if (a->parameter && (a->parameter->type == V_ASN1_OBJECT))
- {
- /* type == V_ASN1_OBJECT => the parameters are given
- * by an asn1 OID
- */
- EC_KEY *ec_key;
- EC_GROUP *group;
- if (ret->pkey.ec == NULL)
- ret->pkey.ec = EC_KEY_new();
- ec_key = ret->pkey.ec;
- if (ec_key == NULL)
- goto err;
- group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(a->parameter->value.object));
- if (group == NULL)
- goto err;
- EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
- if (EC_KEY_set_group(ec_key, group) == 0)
- goto err;
- EC_GROUP_free(group);
- }
- /* the case implicitlyCA is currently not implemented */
- ret->save_parameters = 1;
- }
- #endif
- p=key->public_key->data;
- j=key->public_key->length;
- if (!d2i_PublicKey(type, &ret, &p, (long)j))
- {
- X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB);
- goto err;
- }
- key->pkey = ret;
- CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
- return(ret);
- err:
- if (ret != NULL)
- EVP_PKEY_free(ret);
- return(NULL);
- }
- /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
- * and encode or decode as X509_PUBKEY
- */
- EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp,
- long length)
- {
- X509_PUBKEY *xpk;
- EVP_PKEY *pktmp;
- xpk = d2i_X509_PUBKEY(NULL, pp, length);
- if(!xpk) return NULL;
- pktmp = X509_PUBKEY_get(xpk);
- X509_PUBKEY_free(xpk);
- if(!pktmp) return NULL;
- if(a)
- {
- EVP_PKEY_free(*a);
- *a = pktmp;
- }
- return pktmp;
- }
- int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
- {
- X509_PUBKEY *xpk=NULL;
- int ret;
- if(!a) return 0;
- if(!X509_PUBKEY_set(&xpk, a)) return 0;
- ret = i2d_X509_PUBKEY(xpk, pp);
- X509_PUBKEY_free(xpk);
- return ret;
- }
- /* The following are equivalents but which return RSA and DSA
- * keys
- */
- #ifndef OPENSSL_NO_RSA
- RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp,
- long length)
- {
- EVP_PKEY *pkey;
- RSA *key;
- const unsigned char *q;
- q = *pp;
- pkey = d2i_PUBKEY(NULL, &q, length);
- if (!pkey) return NULL;
- key = EVP_PKEY_get1_RSA(pkey);
- EVP_PKEY_free(pkey);
- if (!key) return NULL;
- *pp = q;
- if (a)
- {
- RSA_free(*a);
- *a = key;
- }
- return key;
- }
- int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
- {
- EVP_PKEY *pktmp;
- int ret;
- if (!a) return 0;
- pktmp = EVP_PKEY_new();
- if (!pktmp)
- {
- ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- EVP_PKEY_set1_RSA(pktmp, a);
- ret = i2d_PUBKEY(pktmp, pp);
- EVP_PKEY_free(pktmp);
- return ret;
- }
- #endif
- #ifndef OPENSSL_NO_DSA
- DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp,
- long length)
- {
- EVP_PKEY *pkey;
- DSA *key;
- const unsigned char *q;
- q = *pp;
- pkey = d2i_PUBKEY(NULL, &q, length);
- if (!pkey) return NULL;
- key = EVP_PKEY_get1_DSA(pkey);
- EVP_PKEY_free(pkey);
- if (!key) return NULL;
- *pp = q;
- if (a)
- {
- DSA_free(*a);
- *a = key;
- }
- return key;
- }
- int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
- {
- EVP_PKEY *pktmp;
- int ret;
- if(!a) return 0;
- pktmp = EVP_PKEY_new();
- if(!pktmp)
- {
- ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- EVP_PKEY_set1_DSA(pktmp, a);
- ret = i2d_PUBKEY(pktmp, pp);
- EVP_PKEY_free(pktmp);
- return ret;
- }
- #endif
- #ifndef OPENSSL_NO_EC
- EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
- {
- EVP_PKEY *pkey;
- EC_KEY *key;
- const unsigned char *q;
- q = *pp;
- pkey = d2i_PUBKEY(NULL, &q, length);
- if (!pkey) return(NULL);
- key = EVP_PKEY_get1_EC_KEY(pkey);
- EVP_PKEY_free(pkey);
- if (!key) return(NULL);
- *pp = q;
- if (a)
- {
- EC_KEY_free(*a);
- *a = key;
- }
- return(key);
- }
- int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
- {
- EVP_PKEY *pktmp;
- int ret;
- if (!a) return(0);
- if ((pktmp = EVP_PKEY_new()) == NULL)
- {
- ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
- return(0);
- }
- EVP_PKEY_set1_EC_KEY(pktmp, a);
- ret = i2d_PUBKEY(pktmp, pp);
- EVP_PKEY_free(pktmp);
- return(ret);
- }
- #endif