diff options
Diffstat (limited to 'openssl/crypto/asn1/x_pubkey.c')
| -rw-r--r-- | openssl/crypto/asn1/x_pubkey.c | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/x_pubkey.c b/openssl/crypto/asn1/x_pubkey.c new file mode 100644 index 0000000..6c57a79 --- /dev/null +++ b/openssl/crypto/asn1/x_pubkey.c @@ -0,0 +1,374 @@ +/* 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> +#include "asn1_locl.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, + void *exarg) +{ + 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; + + 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)) { + X509err(X509_F_X509_PUBKEY_SET, + X509_R_PUBLIC_KEY_ENCODE_ERROR); + goto error; + } + } else { + X509err(X509_F_X509_PUBKEY_SET, X509_R_METHOD_NOT_SUPPORTED); + goto error; + } + } else { + X509err(X509_F_X509_PUBKEY_SET, 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_get(X509_PUBKEY *key) +{ + EVP_PKEY *ret = NULL; + + if (key == NULL) + goto error; + + if (key->pkey != NULL) { + CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); + return key->pkey; + } + + if (key->public_key == NULL) + goto error; + + if ((ret = EVP_PKEY_new()) == NULL) { + X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); + goto error; + } + + if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) { + X509err(X509_F_X509_PUBKEY_GET, X509_R_UNSUPPORTED_ALGORITHM); + goto error; + } + + if (ret->ameth->pub_decode) { + if (!ret->ameth->pub_decode(ret, key)) { + X509err(X509_F_X509_PUBKEY_GET, X509_R_PUBLIC_KEY_DECODE_ERROR); + goto error; + } + } else { + X509err(X509_F_X509_PUBKEY_GET, 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); + } + CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY); + + return ret; + + error: + 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; + const unsigned char *q; + q = *pp; + xpk = d2i_X509_PUBKEY(NULL, &q, length); + if (!xpk) + return NULL; + pktmp = X509_PUBKEY_get(xpk); + X509_PUBKEY_free(xpk); + if (!pktmp) + return NULL; + *pp = q; + 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 + +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) { + if (pub->public_key->data) + OPENSSL_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; +} |