/* $OpenBSD: x_pubkey.c,v 1.27 2018/03/17 14:55:39 jsing Exp $ */ /* 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 <openssl/opensslconf.h> #include <openssl/asn1t.h> #include <openssl/err.h> #include <openssl/x509.h> #ifndef OPENSSL_NO_DSA #include <openssl/dsa.h> #endif #ifndef OPENSSL_NO_RSA #include <openssl/rsa.h> #endif #include "asn1_locl.h" /* Minor tweak to operation: free up EVP_PKEY */ static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { if (operation == ASN1_OP_FREE_POST) { X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; EVP_PKEY_free(pubkey->pkey); } return 1; } static const ASN1_AUX X509_PUBKEY_aux = { .asn1_cb = pubkey_cb, }; static const ASN1_TEMPLATE X509_PUBKEY_seq_tt[] = { { .offset = offsetof(X509_PUBKEY, algor), .field_name = "algor", .item = &X509_ALGOR_it, }, { .offset = offsetof(X509_PUBKEY, public_key), .field_name = "public_key", .item = &ASN1_BIT_STRING_it, }, }; const ASN1_ITEM X509_PUBKEY_it = { .itype = ASN1_ITYPE_SEQUENCE, .utype = V_ASN1_SEQUENCE, .templates = X509_PUBKEY_seq_tt, .tcount = sizeof(X509_PUBKEY_seq_tt) / sizeof(ASN1_TEMPLATE), .funcs = &X509_PUBKEY_aux, .size = sizeof(X509_PUBKEY), .sname = "X509_PUBKEY", }; X509_PUBKEY * d2i_X509_PUBKEY(X509_PUBKEY **a, const unsigned char **in, long len) { return (X509_PUBKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, &X509_PUBKEY_it); } int i2d_X509_PUBKEY(X509_PUBKEY *a, unsigned char **out) { return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_PUBKEY_it); } X509_PUBKEY * X509_PUBKEY_new(void) { return (X509_PUBKEY *)ASN1_item_new(&X509_PUBKEY_it); } void X509_PUBKEY_free(X509_PUBKEY *a) { ASN1_item_free((ASN1_VALUE *)a, &X509_PUBKEY_it); } int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) { X509_PUBKEY *pk = NULL; if (x == NULL) return (0); if ((pk = X509_PUBKEY_new()) == NULL) goto error; if (pkey->ameth) { if (pkey->ameth->pub_encode) { if (!pkey->ameth->pub_encode(pk, pkey)) { X509error(X509_R_PUBLIC_KEY_ENCODE_ERROR); goto error; } } else { X509error(X509_R_METHOD_NOT_SUPPORTED); goto error; } } else { X509error(X509_R_UNSUPPORTED_ALGORITHM); goto error; } if (*x != NULL) X509_PUBKEY_free(*x); *x = pk; return 1; error: if (pk != NULL) X509_PUBKEY_free(pk); return 0; } EVP_PKEY * X509_PUBKEY_get0(X509_PUBKEY *key) { EVP_PKEY *ret = NULL; if (key == NULL) goto error; if (key->pkey != NULL) return key->pkey; if (key->public_key == NULL) goto error; if ((ret = EVP_PKEY_new()) == NULL) { X509error(ERR_R_MALLOC_FAILURE); goto error; } if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) { X509error(X509_R_UNSUPPORTED_ALGORITHM); goto error; } if (ret->ameth->pub_decode) { if (!ret->ameth->pub_decode(ret, key)) { X509error(X509_R_PUBLIC_KEY_DECODE_ERROR); goto error; } } else { X509error(X509_R_METHOD_NOT_SUPPORTED); goto error; } /* Check to see if another thread set key->pkey first */ CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY); if (key->pkey) { CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); EVP_PKEY_free(ret); ret = key->pkey; } else { key->pkey = ret; CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); } return ret; error: EVP_PKEY_free(ret); return (NULL); } EVP_PKEY * X509_PUBKEY_get(X509_PUBKEY *key) { EVP_PKEY *pkey; if ((pkey = X509_PUBKEY_get0(key)) == NULL) return (NULL); CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); return pkey; } /* 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) { ASN1error(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) { ASN1error(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) { ASN1error(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 int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, int ptype, void *pval, unsigned char *penc, int penclen) { if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) return 0; if (penc) { free(pub->public_key->data); pub->public_key->data = penc; pub->public_key->length = penclen; /* Set number of unused bits to zero */ pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; } return 1; } int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, const unsigned char **pk, int *ppklen, X509_ALGOR **pa, X509_PUBKEY *pub) { if (ppkalg) *ppkalg = pub->algor->algorithm; if (pk) { *pk = pub->public_key->data; *ppklen = pub->public_key->length; } if (pa) *pa = pub->algor; return 1; }