/* * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation * * Author: Nikos Mavrogiannopoulos * * This file is part of GNUTLS. * * The GNUTLS library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA * */ #include #include "gnutls_auth_int.h" #include "gnutls_errors.h" #include #include #include "gnutls_dh.h" #include "gnutls_num.h" #include "libtasn1.h" #include "gnutls_datum.h" #include #include #include #include #include #include #include #include #include #include #include #include "x509/common.h" #include "x509/x509.h" #include "x509/verify.h" #include "x509/mpi.h" #include "x509/pkcs7.h" #include "x509/privkey.h" #include "read-file.h" /* * some x509 certificate parsing functions. */ /* Check if the number of bits of the key in the certificate * is unacceptable. */ inline static int check_bits (gnutls_x509_crt_t crt, unsigned int max_bits) { int ret; unsigned int bits; ret = gnutls_x509_crt_get_pk_algorithm (crt, &bits); if (ret < 0) { gnutls_assert (); return ret; } if (bits > max_bits) { gnutls_assert (); return GNUTLS_E_CONSTRAINT_ERROR; } return 0; } #define CLEAR_CERTS for(x=0;xkey, GNUTLS_CRD_CERTIFICATE, NULL); if (cred == NULL) { gnutls_assert (); return GNUTLS_E_INSUFFICIENT_CREDENTIALS; } if (info->raw_certificate_list == NULL || info->ncerts == 0) return GNUTLS_E_NO_CERTIFICATE_FOUND; if (info->ncerts > cred->verify_depth) { gnutls_assert (); return GNUTLS_E_CONSTRAINT_ERROR; } /* generate a list of gnutls_certs based on the auth info * raw certs. */ peer_certificate_list_size = info->ncerts; peer_certificate_list = gnutls_calloc (1, peer_certificate_list_size * sizeof (gnutls_x509_crt_t)); if (peer_certificate_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } for (i = 0; i < peer_certificate_list_size; i++) { ret = gnutls_x509_crt_init (&peer_certificate_list[i]); if (ret < 0) { gnutls_assert (); CLEAR_CERTS; return ret; } ret = gnutls_x509_crt_import (peer_certificate_list[i], &info->raw_certificate_list[i], GNUTLS_X509_FMT_DER); if (ret < 0) { gnutls_assert (); CLEAR_CERTS; return ret; } ret = check_bits (peer_certificate_list[i], cred->verify_bits); if (ret < 0) { gnutls_assert (); CLEAR_CERTS; return ret; } } /* Verify certificate */ ret = gnutls_x509_crt_list_verify (peer_certificate_list, peer_certificate_list_size, cred->x509_ca_list, cred->x509_ncas, cred->x509_crl_list, cred->x509_ncrls, cred->verify_flags, status); CLEAR_CERTS; if (ret < 0) { gnutls_assert (); return ret; } return 0; } /* * Read certificates and private keys, from files, memory etc. */ /* returns error if the certificate has different algorithm than * the given key parameters. */ static int _gnutls_check_key_cert_match (gnutls_certificate_credentials_t res) { gnutls_datum_t cid; gnutls_datum_t kid; unsigned pk = res->cert_list[res->ncerts - 1][0].subject_pk_algorithm; if (res->pkey[res->ncerts - 1].pk_algorithm != pk) { gnutls_assert (); return GNUTLS_E_CERTIFICATE_KEY_MISMATCH; } if (pk == GNUTLS_PK_RSA) { _gnutls_x509_write_rsa_params (res->pkey[res->ncerts - 1].params, res->pkey[res->ncerts - 1].params_size, &kid); _gnutls_x509_write_rsa_params (res->cert_list[res->ncerts - 1][0]. params, res->cert_list[res->ncerts - 1][0].params_size, &cid); } else if (pk == GNUTLS_PK_DSA) { _gnutls_x509_write_dsa_params (res->pkey[res->ncerts - 1].params, res->pkey[res->ncerts - 1].params_size, &kid); _gnutls_x509_write_dsa_params (res->cert_list[res->ncerts - 1][0]. params, res->cert_list[res->ncerts - 1][0].params_size, &cid); } if (cid.size != kid.size) { gnutls_assert (); _gnutls_free_datum (&kid); _gnutls_free_datum (&cid); return GNUTLS_E_CERTIFICATE_KEY_MISMATCH; } if (memcmp (kid.data, cid.data, kid.size) != 0) { gnutls_assert (); _gnutls_free_datum (&kid); _gnutls_free_datum (&cid); return GNUTLS_E_CERTIFICATE_KEY_MISMATCH; } _gnutls_free_datum (&kid); _gnutls_free_datum (&cid); return 0; } /* Reads a DER encoded certificate list from memory and stores it to * a gnutls_cert structure. This is only called if PKCS7 read fails. * returns the number of certificates parsed (1) */ static int parse_crt_mem (gnutls_cert ** cert_list, unsigned *ncerts, gnutls_x509_crt_t cert) { int i; int ret; i = *ncerts + 1; *cert_list = (gnutls_cert *) gnutls_realloc_fast (*cert_list, i * sizeof (gnutls_cert)); if (*cert_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } ret = _gnutls_x509_crt_to_gcert (&cert_list[0][i - 1], cert, 0); if (ret < 0) { gnutls_assert (); return ret; } *ncerts = i; return 1; /* one certificate parsed */ } /* Reads a DER encoded certificate list from memory and stores it to * a gnutls_cert structure. This is only called if PKCS7 read fails. * returns the number of certificates parsed (1) */ static int parse_der_cert_mem (gnutls_cert ** cert_list, unsigned *ncerts, const void *input_cert, int input_cert_size) { gnutls_datum_t tmp; gnutls_x509_crt_t cert; int ret; ret = gnutls_x509_crt_init (&cert); if (ret < 0) { gnutls_assert (); return ret; } tmp.data = (opaque *) input_cert; tmp.size = input_cert_size; ret = gnutls_x509_crt_import (cert, &tmp, GNUTLS_X509_FMT_DER); if (ret < 0) { gnutls_assert (); gnutls_x509_crt_deinit (cert); return ret; } ret = parse_crt_mem (cert_list, ncerts, cert); gnutls_x509_crt_deinit (cert); return ret; } #define CERT_PEM 1 /* Reads a PKCS7 base64 encoded certificate list from memory and stores it to * a gnutls_cert structure. * returns the number of certificate parsed */ static int parse_pkcs7_cert_mem (gnutls_cert ** cert_list, unsigned *ncerts, const void *input_cert, int input_cert_size, int flags) { #ifdef ENABLE_PKI int i, j, count; gnutls_datum_t tmp, tmp2; int ret; opaque *pcert = NULL; size_t pcert_size; gnutls_pkcs7_t pkcs7; ret = gnutls_pkcs7_init (&pkcs7); if (ret < 0) { gnutls_assert (); return ret; } if (flags & CERT_PEM) ret = gnutls_pkcs7_import (pkcs7, &tmp, GNUTLS_X509_FMT_PEM); else ret = gnutls_pkcs7_import (pkcs7, &tmp, GNUTLS_X509_FMT_DER); if (ret < 0) { /* if we failed to read the structure, * then just try to decode a plain DER * certificate. */ gnutls_assert (); gnutls_pkcs7_deinit (pkcs7); #endif return parse_der_cert_mem (cert_list, ncerts, input_cert, input_cert_size); #ifdef ENABLE_PKI } i = *ncerts + 1; /* tmp now contains the decoded certificate list */ tmp.data = (opaque *) input_cert; tmp.size = input_cert_size; ret = gnutls_pkcs7_get_crt_count (pkcs7); if (ret < 0) { gnutls_assert (); gnutls_pkcs7_deinit (pkcs7); return ret; } count = ret; j = count - 1; do { pcert_size = 0; ret = gnutls_pkcs7_get_crt_raw (pkcs7, j, NULL, &pcert_size); if (ret != GNUTLS_E_MEMORY_ERROR) { count--; continue; } pcert = gnutls_malloc (pcert_size); if (ret == GNUTLS_E_MEMORY_ERROR) { gnutls_assert (); count--; continue; } /* read the certificate */ ret = gnutls_pkcs7_get_crt_raw (pkcs7, j, pcert, &pcert_size); j--; if (ret >= 0) { *cert_list = (gnutls_cert *) gnutls_realloc_fast (*cert_list, i * sizeof (gnutls_cert)); if (*cert_list == NULL) { gnutls_assert (); gnutls_free (pcert); return GNUTLS_E_MEMORY_ERROR; } tmp2.data = pcert; tmp2.size = pcert_size; ret = _gnutls_x509_raw_cert_to_gcert (&cert_list[0][i - 1], &tmp2, 0); if (ret < 0) { gnutls_assert (); gnutls_pkcs7_deinit (pkcs7); gnutls_free (pcert); return ret; } i++; } gnutls_free (pcert); } while (ret >= 0 && j >= 0); *ncerts = i - 1; gnutls_pkcs7_deinit (pkcs7); return count; #endif } /* Reads a base64 encoded certificate list from memory and stores it to * a gnutls_cert structure. Returns the number of certificate parsed. */ static int parse_pem_cert_mem (gnutls_cert ** cert_list, unsigned *ncerts, const char *input_cert, int input_cert_size) { int size, siz2, i; const char *ptr; opaque *ptr2; gnutls_datum_t tmp; int ret, count; #ifdef ENABLE_PKI if ((ptr = memmem (input_cert, input_cert_size, PEM_PKCS7_SEP, sizeof (PEM_PKCS7_SEP) - 1)) != NULL) { size = strlen (ptr); ret = parse_pkcs7_cert_mem (cert_list, ncerts, ptr, size, CERT_PEM); return ret; } #endif /* move to the certificate */ ptr = memmem (input_cert, input_cert_size, PEM_CERT_SEP, sizeof (PEM_CERT_SEP) - 1); if (ptr == NULL) ptr = memmem (input_cert, input_cert_size, PEM_CERT_SEP2, sizeof (PEM_CERT_SEP2) - 1); if (ptr == NULL) { gnutls_assert (); return GNUTLS_E_BASE64_DECODING_ERROR; } size = input_cert_size - (ptr - input_cert); i = *ncerts + 1; count = 0; do { siz2 = _gnutls_fbase64_decode (NULL, ptr, size, &ptr2); if (siz2 < 0) { gnutls_assert (); return GNUTLS_E_BASE64_DECODING_ERROR; } *cert_list = (gnutls_cert *) gnutls_realloc_fast (*cert_list, i * sizeof (gnutls_cert)); if (*cert_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } tmp.data = ptr2; tmp.size = siz2; ret = _gnutls_x509_raw_cert_to_gcert (&cert_list[0][i - 1], &tmp, 0); if (ret < 0) { gnutls_assert (); return ret; } _gnutls_free_datum (&tmp); /* free ptr2 */ /* now we move ptr after the pem header */ ptr++; /* find the next certificate (if any) */ size = input_cert_size - (ptr - input_cert); if (size > 0) { char *ptr3; ptr3 = memmem (ptr, size, PEM_CERT_SEP, sizeof (PEM_CERT_SEP) - 1); if (ptr3 == NULL) ptr3 = memmem (ptr, size, PEM_CERT_SEP2, sizeof (PEM_CERT_SEP2) - 1); ptr = ptr3; } else ptr = NULL; i++; count++; } while (ptr != NULL); *ncerts = i - 1; return count; } /* Reads a DER or PEM certificate from memory */ static int read_cert_mem (gnutls_certificate_credentials_t res, const void *cert, int cert_size, gnutls_x509_crt_fmt_t type) { int ret; /* allocate space for the certificate to add */ res->cert_list = gnutls_realloc_fast (res->cert_list, (1 + res->ncerts) * sizeof (gnutls_cert *)); if (res->cert_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } res->cert_list_length = gnutls_realloc_fast (res->cert_list_length, (1 + res->ncerts) * sizeof (int)); if (res->cert_list_length == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } res->cert_list[res->ncerts] = NULL; /* for realloc */ res->cert_list_length[res->ncerts] = 0; if (type == GNUTLS_X509_FMT_DER) ret = parse_pkcs7_cert_mem (&res->cert_list[res->ncerts], &res->cert_list_length[res->ncerts], cert, cert_size, 0); else ret = parse_pem_cert_mem (&res->cert_list[res->ncerts], &res->cert_list_length[res->ncerts], cert, cert_size); if (ret < 0) { gnutls_assert (); return ret; } return ret; } int _gnutls_x509_privkey_to_gkey (gnutls_privkey * dest, gnutls_x509_privkey_t src) { int i, ret; memset (dest, 0, sizeof (gnutls_privkey)); for (i = 0; i < src->params_size; i++) { dest->params[i] = _gnutls_mpi_copy (src->params[i]); if (dest->params[i] == NULL) { gnutls_assert (); ret = GNUTLS_E_MEMORY_ERROR; goto cleanup; } } dest->pk_algorithm = src->pk_algorithm; dest->params_size = src->params_size; return 0; cleanup: for (i = 0; i < src->params_size; i++) { _gnutls_mpi_release (&dest->params[i]); } return ret; } void _gnutls_gkey_deinit (gnutls_privkey * key) { int i; if (key == NULL) return; for (i = 0; i < key->params_size; i++) { _gnutls_mpi_release (&key->params[i]); } } int _gnutls_x509_raw_privkey_to_gkey (gnutls_privkey * privkey, const gnutls_datum_t * raw_key, gnutls_x509_crt_fmt_t type) { gnutls_x509_privkey_t tmpkey; int ret; ret = gnutls_x509_privkey_init (&tmpkey); if (ret < 0) { gnutls_assert (); return ret; } ret = gnutls_x509_privkey_import (tmpkey, raw_key, type); /* If normal key decoding doesn't work try decoding a plain PKCS #8 key */ if (ret < 0) ret = gnutls_x509_privkey_import_pkcs8( tmpkey, raw_key, type, NULL, GNUTLS_PKCS_PLAIN); if (ret < 0) { gnutls_assert (); gnutls_x509_privkey_deinit (tmpkey); return ret; } ret = _gnutls_x509_privkey_to_gkey (privkey, tmpkey); if (ret < 0) { gnutls_assert (); gnutls_x509_privkey_deinit (tmpkey); return ret; } gnutls_x509_privkey_deinit (tmpkey); return 0; } /* Reads a PEM encoded PKCS-1 RSA/DSA private key from memory. Type * indicates the certificate format. KEY can be NULL, to indicate * that GnuTLS doesn't know the private key. */ static int read_key_mem (gnutls_certificate_credentials_t res, const void *key, int key_size, gnutls_x509_crt_fmt_t type) { int ret; gnutls_datum_t tmp; /* allocate space for the pkey list */ res->pkey = gnutls_realloc_fast (res->pkey, (res->ncerts + 1) * sizeof (gnutls_privkey)); if (res->pkey == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } if (key) { tmp.data = (opaque *) key; tmp.size = key_size; ret = _gnutls_x509_raw_privkey_to_gkey (&res->pkey[res->ncerts], &tmp, type); if (ret < 0) { gnutls_assert (); return ret; } } else memset (&res->pkey[res->ncerts], 0, sizeof (gnutls_privkey)); return 0; } /* Reads a certificate file */ static int read_cert_file (gnutls_certificate_credentials_t res, const char *certfile, gnutls_x509_crt_fmt_t type) { int ret; size_t size; char *data = read_binary_file (certfile, &size); if (data == NULL) { gnutls_assert (); return GNUTLS_E_FILE_ERROR; } ret = read_cert_mem (res, data, size, type); free (data); return ret; } /* Reads PKCS-1 RSA private key file or a DSA file (in the format openssl * stores it). */ static int read_key_file (gnutls_certificate_credentials_t res, const char *keyfile, gnutls_x509_crt_fmt_t type) { int ret; size_t size; char *data = read_binary_file (keyfile, &size); if (data == NULL) { gnutls_assert (); return GNUTLS_E_FILE_ERROR; } ret = read_key_mem (res, data, size, type); free (data); return ret; } /** * gnutls_certificate_set_x509_key_mem - Used to set keys in a gnutls_certificate_credentials_t structure * @res: is an #gnutls_certificate_credentials_t structure. * @cert: contains a certificate list (path) for the specified private key * @key: is the private key, or %NULL * @type: is PEM or DER * * This function sets a certificate/private key pair in the * gnutls_certificate_credentials_t structure. This function may be called * more than once (in case multiple keys/certificates exist for the * server). * * Currently are supported: RSA PKCS-1 encoded private keys, * DSA private keys. * * DSA private keys are encoded the OpenSSL way, which is an ASN.1 * DER sequence of 6 INTEGERs - version, p, q, g, pub, priv. * * Note that the keyUsage (2.5.29.15) PKIX extension in X.509 certificates * is supported. This means that certificates intended for signing cannot * be used for ciphersuites that require encryption. * * If the certificate and the private key are given in PEM encoding * then the strings that hold their values must be null terminated. * * The @key may be %NULL if you are using a sign callback, see * gnutls_sign_callback_set(). * * Returns: %GNUTLS_E_SUCCESS on success, or an error code. **/ int gnutls_certificate_set_x509_key_mem (gnutls_certificate_credentials_t res, const gnutls_datum_t * cert, const gnutls_datum_t * key, gnutls_x509_crt_fmt_t type) { int ret; /* this should be first */ if ((ret = read_key_mem (res, key ? key->data : NULL, key ? key->size : 0, type)) < 0) return ret; if ((ret = read_cert_mem (res, cert->data, cert->size, type)) < 0) return ret; res->ncerts++; if (key && (ret = _gnutls_check_key_cert_match (res)) < 0) { gnutls_assert (); return ret; } return 0; } /** * gnutls_certificate_set_x509_key - Used to set keys in a gnutls_certificate_credentials_t structure * @res: is an #gnutls_certificate_credentials_t structure. * @cert_list: contains a certificate list (path) for the specified private key * @cert_list_size: holds the size of the certificate list * @key: is a gnutls_x509_privkey_t key * * This function sets a certificate/private key pair in the * gnutls_certificate_credentials_t structure. This function may be * called more than once (in case multiple keys/certificates exist * for the server). * * Returns: %GNUTLS_E_SUCCESS on success, or an error code. **/ int gnutls_certificate_set_x509_key (gnutls_certificate_credentials_t res, gnutls_x509_crt_t * cert_list, int cert_list_size, gnutls_x509_privkey_t key) { int ret, i; /* this should be first */ res->pkey = gnutls_realloc_fast (res->pkey, (res->ncerts + 1) * sizeof (gnutls_privkey)); if (res->pkey == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } ret = _gnutls_x509_privkey_to_gkey (&res->pkey[res->ncerts], key); if (ret < 0) { gnutls_assert (); return ret; } res->cert_list = gnutls_realloc_fast (res->cert_list, (1 + res->ncerts) * sizeof (gnutls_cert *)); if (res->cert_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } res->cert_list_length = gnutls_realloc_fast (res->cert_list_length, (1 + res->ncerts) * sizeof (int)); if (res->cert_list_length == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } res->cert_list[res->ncerts] = NULL; /* for realloc */ res->cert_list_length[res->ncerts] = 0; for (i = 0; i < cert_list_size; i++) { ret = parse_crt_mem (&res->cert_list[res->ncerts], &res->cert_list_length[res->ncerts], cert_list[i]); if (ret < 0) { gnutls_assert (); return ret; } } res->ncerts++; if ((ret = _gnutls_check_key_cert_match (res)) < 0) { gnutls_assert (); return ret; } return 0; } /** * gnutls_certificate_set_x509_key_file - Used to set keys in a gnutls_certificate_credentials_t structure * @res: is an #gnutls_certificate_credentials_t structure. * @CERTFILE: is a file that containing the certificate list (path) for * the specified private key, in PKCS7 format, or a list of certificates * @KEYFILE: is a file that contains the private key * @type: is PEM or DER * * This function sets a certificate/private key pair in the * gnutls_certificate_credentials_t structure. This function may be * called more than once (in case multiple keys/certificates exist * for the server). * * Currently only PKCS-1 encoded RSA and DSA private keys are accepted by * this function. * * Returns: %GNUTLS_E_SUCCESS on success, or an error code. **/ int gnutls_certificate_set_x509_key_file (gnutls_certificate_credentials_t res, const char *CERTFILE, const char *KEYFILE, gnutls_x509_crt_fmt_t type) { int ret; /* this should be first */ if ((ret = read_key_file (res, KEYFILE, type)) < 0) return ret; if ((ret = read_cert_file (res, CERTFILE, type)) < 0) return ret; res->ncerts++; if ((ret = _gnutls_check_key_cert_match (res)) < 0) { gnutls_assert (); return ret; } return 0; } static int generate_rdn_seq (gnutls_certificate_credentials_t res) { gnutls_datum_t tmp; int ret; unsigned size, i; opaque *pdata; /* Generate the RDN sequence * This will be sent to clients when a certificate * request message is sent. */ /* FIXME: in case of a client it is not needed * to do that. This would save time and memory. * However we don't have that information available * here. */ size = 0; for (i = 0; i < res->x509_ncas; i++) { if ((ret = gnutls_x509_crt_get_raw_dn (res->x509_ca_list[i], &tmp)) < 0) { gnutls_assert (); return ret; } size += (2 + tmp.size); _gnutls_free_datum (&tmp); } if (res->x509_rdn_sequence.data != NULL) gnutls_free (res->x509_rdn_sequence.data); res->x509_rdn_sequence.data = gnutls_malloc (size); if (res->x509_rdn_sequence.data == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } res->x509_rdn_sequence.size = size; pdata = res->x509_rdn_sequence.data; for (i = 0; i < res->x509_ncas; i++) { if ((ret = gnutls_x509_crt_get_raw_dn (res->x509_ca_list[i], &tmp)) < 0) { _gnutls_free_datum (&res->x509_rdn_sequence); gnutls_assert (); return ret; } _gnutls_write_datum16 (pdata, tmp); pdata += (2 + tmp.size); _gnutls_free_datum (&tmp); } return 0; } /* Returns 0 if it's ok to use the gnutls_kx_algorithm_t with this * certificate (uses the KeyUsage field). */ int _gnutls_check_key_usage (const gnutls_cert * cert, gnutls_kx_algorithm_t alg) { unsigned int key_usage = 0; int encipher_type; if (cert == NULL) { gnutls_assert (); return GNUTLS_E_INTERNAL_ERROR; } if (_gnutls_map_kx_get_cred (alg, 1) == GNUTLS_CRD_CERTIFICATE || _gnutls_map_kx_get_cred (alg, 0) == GNUTLS_CRD_CERTIFICATE) { key_usage = cert->key_usage; encipher_type = _gnutls_kx_encipher_type (alg); if (key_usage != 0 && encipher_type != CIPHER_IGN) { /* If key_usage has been set in the certificate */ if (encipher_type == CIPHER_ENCRYPT) { /* If the key exchange method requires an encipher * type algorithm, and key's usage does not permit * encipherment, then fail. */ if (!(key_usage & KEY_KEY_ENCIPHERMENT)) { gnutls_assert (); return GNUTLS_E_KEY_USAGE_VIOLATION; } } if (encipher_type == CIPHER_SIGN) { /* The same as above, but for sign only keys */ if (!(key_usage & KEY_DIGITAL_SIGNATURE)) { gnutls_assert (); return GNUTLS_E_KEY_USAGE_VIOLATION; } } } } return 0; } static int parse_pem_ca_mem (gnutls_x509_crt_t ** cert_list, unsigned *ncerts, const opaque * input_cert, int input_cert_size) { int i, size; const opaque *ptr; gnutls_datum_t tmp; int ret, count; /* move to the certificate */ ptr = memmem (input_cert, input_cert_size, PEM_CERT_SEP, sizeof (PEM_CERT_SEP) - 1); if (ptr == NULL) ptr = memmem (input_cert, input_cert_size, PEM_CERT_SEP2, sizeof (PEM_CERT_SEP2) - 1); if (ptr == NULL) { gnutls_assert (); return GNUTLS_E_BASE64_DECODING_ERROR; } size = input_cert_size - (ptr - input_cert); i = *ncerts + 1; count = 0; do { *cert_list = (gnutls_x509_crt_t *) gnutls_realloc_fast (*cert_list, i * sizeof (gnutls_x509_crt_t)); if (*cert_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } ret = gnutls_x509_crt_init (&cert_list[0][i - 1]); if (ret < 0) { gnutls_assert (); return ret; } tmp.data = (opaque *) ptr; tmp.size = size; ret = gnutls_x509_crt_import (cert_list[0][i - 1], &tmp, GNUTLS_X509_FMT_PEM); if (ret < 0) { gnutls_assert (); return ret; } /* now we move ptr after the pem header */ ptr++; size--; /* find the next certificate (if any) */ if (size > 0) { char *ptr3; ptr3 = memmem (ptr, size, PEM_CERT_SEP, sizeof (PEM_CERT_SEP) - 1); if (ptr3 == NULL) ptr3 = memmem (ptr, size, PEM_CERT_SEP2, sizeof (PEM_CERT_SEP2) - 1); ptr = ptr3; size = input_cert_size - (ptr - input_cert); } else ptr = NULL; i++; count++; } while (ptr != NULL); *ncerts = i - 1; return count; } /* Reads a DER encoded certificate list from memory and stores it to * a gnutls_cert structure. This is only called if PKCS7 read fails. * returns the number of certificates parsed (1) */ static int parse_der_ca_mem (gnutls_x509_crt_t ** cert_list, unsigned *ncerts, const void *input_cert, int input_cert_size) { int i; gnutls_datum_t tmp; int ret; i = *ncerts + 1; *cert_list = (gnutls_x509_crt_t *) gnutls_realloc_fast (*cert_list, i * sizeof (gnutls_x509_crt_t)); if (*cert_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } tmp.data = (opaque *) input_cert; tmp.size = input_cert_size; ret = gnutls_x509_crt_init (&cert_list[0][i - 1]); if (ret < 0) { gnutls_assert (); return ret; } ret = gnutls_x509_crt_import (cert_list[0][i - 1], &tmp, GNUTLS_X509_FMT_DER); if (ret < 0) { gnutls_assert (); return ret; } *ncerts = i; return 1; /* one certificate parsed */ } /** * gnutls_certificate_set_x509_trust_mem - Used to add trusted CAs in a gnutls_certificate_credentials_t structure * @res: is an #gnutls_certificate_credentials_t structure. * @ca: is a list of trusted CAs or a DER certificate * @type: is DER or PEM * * This function adds the trusted CAs in order to verify client or * server certificates. In case of a client this is not required to * be called if the certificates are not verified using * gnutls_certificate_verify_peers2(). This function may be called * multiple times. * * In case of a server the CAs set here will be sent to the client if * a certificate request is sent. This can be disabled using * gnutls_certificate_send_x509_rdn_sequence(). * * Returns: the number of certificates processed or a negative value * on error. **/ int gnutls_certificate_set_x509_trust_mem (gnutls_certificate_credentials_t res, const gnutls_datum_t * ca, gnutls_x509_crt_fmt_t type) { int ret, ret2; if (type == GNUTLS_X509_FMT_DER) ret = parse_der_ca_mem (&res->x509_ca_list, &res->x509_ncas, ca->data, ca->size); else ret = parse_pem_ca_mem (&res->x509_ca_list, &res->x509_ncas, ca->data, ca->size); if ((ret2 = generate_rdn_seq (res)) < 0) return ret2; return ret; } /** * gnutls_certificate_set_x509_trust - Used to add trusted CAs in a gnutls_certificate_credentials_t structure * @res: is an #gnutls_certificate_credentials_t structure. * @ca_list: is a list of trusted CAs * @ca_list_size: holds the size of the CA list * * This function adds the trusted CAs in order to verify client * or server certificates. In case of a client this is not required * to be called if the certificates are not verified using * gnutls_certificate_verify_peers2(). * This function may be called multiple times. * * In case of a server the CAs set here will be sent to the client if * a certificate request is sent. This can be disabled using * gnutls_certificate_send_x509_rdn_sequence(). * * Returns: %GNUTLS_E_SUCCESS on success, or an error code. **/ int gnutls_certificate_set_x509_trust (gnutls_certificate_credentials_t res, gnutls_x509_crt_t * ca_list, int ca_list_size) { int ret, i, ret2; res->x509_ca_list = gnutls_realloc_fast (res->x509_ca_list, (ca_list_size + res->x509_ncas) * sizeof (gnutls_x509_crt_t)); if (res->x509_ca_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } for (i = 0; i < ca_list_size; i++) { ret = gnutls_x509_crt_init (&res->x509_ca_list[ res->x509_ncas]); if (ret < 0) { gnutls_assert (); return ret; } ret = _gnutls_x509_crt_cpy (res->x509_ca_list[ res->x509_ncas], ca_list[i]); if (ret < 0) { gnutls_assert (); gnutls_x509_crt_deinit (res->x509_ca_list[ res->x509_ncas]); return ret; } res->x509_ncas++; } if ((ret2 = generate_rdn_seq (res)) < 0) return ret2; return 0; } /** * gnutls_certificate_set_x509_trust_file - Used to add trusted CAs in a gnutls_certificate_credentials_t structure * @res: is an #gnutls_certificate_credentials_t structure. * @cafile: is a file containing the list of trusted CAs (DER or PEM list) * @type: is PEM or DER * * This function adds the trusted CAs in order to verify client or * server certificates. In case of a client this is not required to * be called if the certificates are not verified using * gnutls_certificate_verify_peers2(). This function may be called * multiple times. * * In case of a server the names of the CAs set here will be sent to * the client if a certificate request is sent. This can be disabled * using gnutls_certificate_send_x509_rdn_sequence(). * * Returns: number of certificates processed, or a negative value on * error. **/ int gnutls_certificate_set_x509_trust_file (gnutls_certificate_credentials_t res, const char *cafile, gnutls_x509_crt_fmt_t type) { int ret, ret2; size_t size; char *data = read_binary_file (cafile, &size); if (data == NULL) { gnutls_assert (); return GNUTLS_E_FILE_ERROR; } if (type == GNUTLS_X509_FMT_DER) ret = parse_der_ca_mem (&res->x509_ca_list, &res->x509_ncas, data, size); else ret = parse_pem_ca_mem (&res->x509_ca_list, &res->x509_ncas, data, size); free (data); if (ret < 0) { gnutls_assert (); return ret; } if ((ret2 = generate_rdn_seq (res)) < 0) return ret2; return ret; } #ifdef ENABLE_PKI static int parse_pem_crl_mem (gnutls_x509_crl_t ** crl_list, unsigned *ncrls, const opaque * input_crl, int input_crl_size) { int size, i; const opaque *ptr; gnutls_datum_t tmp; int ret, count; /* move to the certificate */ ptr = memmem (input_crl, input_crl_size, PEM_CRL_SEP, sizeof (PEM_CRL_SEP) - 1); if (ptr == NULL) { gnutls_assert (); return GNUTLS_E_BASE64_DECODING_ERROR; } size = input_crl_size - (ptr - input_crl); i = *ncrls + 1; count = 0; do { *crl_list = (gnutls_x509_crl_t *) gnutls_realloc_fast (*crl_list, i * sizeof (gnutls_x509_crl_t)); if (*crl_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } ret = gnutls_x509_crl_init (&crl_list[0][i - 1]); if (ret < 0) { gnutls_assert (); return ret; } tmp.data = (char *) ptr; tmp.size = size; ret = gnutls_x509_crl_import (crl_list[0][i - 1], &tmp, GNUTLS_X509_FMT_PEM); if (ret < 0) { gnutls_assert (); return ret; } /* now we move ptr after the pem header */ ptr++; /* find the next certificate (if any) */ size = input_crl_size - (ptr - input_crl); if (size > 0) ptr = memmem (ptr, size, PEM_CRL_SEP, sizeof (PEM_CRL_SEP) - 1); else ptr = NULL; i++; count++; } while (ptr != NULL); *ncrls = i - 1; return count; } /* Reads a DER encoded certificate list from memory and stores it to * a gnutls_cert structure. This is only called if PKCS7 read fails. * returns the number of certificates parsed (1) */ static int parse_der_crl_mem (gnutls_x509_crl_t ** crl_list, unsigned *ncrls, const void *input_crl, int input_crl_size) { int i; gnutls_datum_t tmp; int ret; i = *ncrls + 1; *crl_list = (gnutls_x509_crl_t *) gnutls_realloc_fast (*crl_list, i * sizeof (gnutls_x509_crl_t)); if (*crl_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } tmp.data = (opaque *) input_crl; tmp.size = input_crl_size; ret = gnutls_x509_crl_init (&crl_list[0][i - 1]); if (ret < 0) { gnutls_assert (); return ret; } ret = gnutls_x509_crl_import (crl_list[0][i - 1], &tmp, GNUTLS_X509_FMT_DER); if (ret < 0) { gnutls_assert (); return ret; } *ncrls = i; return 1; /* one certificate parsed */ } /* Reads a DER or PEM CRL from memory */ static int read_crl_mem (gnutls_certificate_credentials_t res, const void *crl, int crl_size, gnutls_x509_crt_fmt_t type) { int ret; /* allocate space for the certificate to add */ res->x509_crl_list = gnutls_realloc_fast (res->x509_crl_list, (1 + res->x509_ncrls) * sizeof (gnutls_x509_crl_t)); if (res->x509_crl_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } if (type == GNUTLS_X509_FMT_DER) ret = parse_der_crl_mem (&res->x509_crl_list, &res->x509_ncrls, crl, crl_size); else ret = parse_pem_crl_mem (&res->x509_crl_list, &res->x509_ncrls, crl, crl_size); if (ret < 0) { gnutls_assert (); return ret; } return ret; } /** * gnutls_certificate_set_x509_crl_mem - Used to add CRLs in a gnutls_certificate_credentials_t structure * @res: is an #gnutls_certificate_credentials_t structure. * @CRL: is a list of trusted CRLs. They should have been verified before. * @type: is DER or PEM * * This function adds the trusted CRLs in order to verify client or * server certificates. In case of a client this is not required to * be called if the certificates are not verified using * gnutls_certificate_verify_peers2(). This function may be called * multiple times. * * Returns: number of CRLs processed, or a negative value on error. **/ int gnutls_certificate_set_x509_crl_mem (gnutls_certificate_credentials_t res, const gnutls_datum_t * CRL, gnutls_x509_crt_fmt_t type) { int ret; if ((ret = read_crl_mem (res, CRL->data, CRL->size, type)) < 0) return ret; return ret; } /** * gnutls_certificate_set_x509_crl - Used to add CRLs in a gnutls_certificate_credentials_t structure * @res: is an #gnutls_certificate_credentials_t structure. * @crl_list: is a list of trusted CRLs. They should have been verified before. * @crl_list_size: holds the size of the crl_list * * This function adds the trusted CRLs in order to verify client or * server certificates. In case of a client this is not required to * be called if the certificates are not verified using * gnutls_certificate_verify_peers2(). This function may be called * multiple times. * * Returns: %GNUTLS_E_SUCCESS on success, or an error code. **/ int gnutls_certificate_set_x509_crl (gnutls_certificate_credentials_t res, gnutls_x509_crl_t * crl_list, int crl_list_size) { int ret, i; res->x509_crl_list = gnutls_realloc_fast (res->x509_crl_list, (crl_list_size + res->x509_ncrls) * sizeof (gnutls_x509_crl_t)); if (res->x509_crl_list == NULL) { gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } for (i = 0; i < crl_list_size; i++) { ret = gnutls_x509_crl_init (&res->x509_crl_list[res->x509_ncrls]); if (ret < 0) { gnutls_assert (); return ret; } ret = _gnutls_x509_crl_cpy (res->x509_crl_list[res->x509_ncrls], crl_list[i]); if (ret < 0) { gnutls_assert (); return ret; } res->x509_ncrls++; } return 0; } /** * gnutls_certificate_set_x509_crl_file - Used to add CRLs in a gnutls_certificate_credentials_t structure * @res: is an #gnutls_certificate_credentials_t structure. * @crlfile: is a file containing the list of verified CRLs (DER or PEM list) * @type: is PEM or DER * * This function adds the trusted CRLs in order to verify client or server * certificates. In case of a client this is not required * to be called if the certificates are not verified using * gnutls_certificate_verify_peers2(). * This function may be called multiple times. * * Returns: number of CRLs processed or a negative value on error. **/ int gnutls_certificate_set_x509_crl_file (gnutls_certificate_credentials_t res, const char *crlfile, gnutls_x509_crt_fmt_t type) { int ret; size_t size; char *data = read_binary_file (crlfile, &size); if (data == NULL) { gnutls_assert (); return GNUTLS_E_FILE_ERROR; } if (type == GNUTLS_X509_FMT_DER) ret = parse_der_crl_mem (&res->x509_crl_list, &res->x509_ncrls, data, size); else ret = parse_pem_crl_mem (&res->x509_crl_list, &res->x509_ncrls, data, size); free (data); if (ret < 0) { gnutls_assert (); return ret; } return ret; } #include static int parse_pkcs12 (gnutls_certificate_credentials_t res, gnutls_pkcs12_t p12, const char *password, gnutls_x509_privkey_t * key, gnutls_x509_crt_t * cert, gnutls_x509_crl_t * crl) { gnutls_pkcs12_bag_t bag = NULL; int index = 0; int ret; for (;;) { int elements_in_bag; int i; ret = gnutls_pkcs12_bag_init (&bag); if (ret < 0) { bag = NULL; gnutls_assert (); goto done; } ret = gnutls_pkcs12_get_bag (p12, index, bag); if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) break; if (ret < 0) { gnutls_assert (); goto done; } ret = gnutls_pkcs12_bag_get_type (bag, 0); if (ret < 0) { gnutls_assert (); goto done; } if (ret == GNUTLS_BAG_ENCRYPTED) { ret = gnutls_pkcs12_bag_decrypt (bag, password); if (ret < 0) { gnutls_assert (); goto done; } } elements_in_bag = gnutls_pkcs12_bag_get_count (bag); if (elements_in_bag < 0) { gnutls_assert (); goto done; } for (i = 0; i < elements_in_bag; i++) { int type; gnutls_datum_t data; type = gnutls_pkcs12_bag_get_type (bag, i); if (type < 0) { gnutls_assert (); goto done; } ret = gnutls_pkcs12_bag_get_data (bag, i, &data); if (ret < 0) { gnutls_assert (); goto done; } switch (type) { case GNUTLS_BAG_PKCS8_ENCRYPTED_KEY: case GNUTLS_BAG_PKCS8_KEY: ret = gnutls_x509_privkey_init (key); if (ret < 0) { gnutls_assert (); goto done; } ret = gnutls_x509_privkey_import_pkcs8 (*key, &data, GNUTLS_X509_FMT_DER, password, type == GNUTLS_BAG_PKCS8_KEY ? GNUTLS_PKCS_PLAIN : 0); if (ret < 0) { gnutls_assert (); goto done; } break; case GNUTLS_BAG_CERTIFICATE: ret = gnutls_x509_crt_init (cert); if (ret < 0) { gnutls_assert (); goto done; } ret = gnutls_x509_crt_import (*cert, &data, GNUTLS_X509_FMT_DER); if (ret < 0) { gnutls_assert (); goto done; } break; case GNUTLS_BAG_CRL: ret = gnutls_x509_crl_init (crl); if (ret < 0) { gnutls_assert (); goto done; } ret = gnutls_x509_crl_import (*crl, &data, GNUTLS_X509_FMT_DER); if (ret < 0) { gnutls_assert (); goto done; } break; case GNUTLS_BAG_ENCRYPTED: /* XXX Bother to recurse one level down? Unlikely to use the same password anyway. */ case GNUTLS_BAG_EMPTY: default: break; } } index++; gnutls_pkcs12_bag_deinit (bag); } ret = 0; done: if (bag) gnutls_pkcs12_bag_deinit (bag); return ret; } /** * gnutls_certificate_set_x509_simple_pkcs12_file: * @res: is an #gnutls_certificate_credentials_t structure. * @pkcs12file: filename of file containing PKCS#12 blob. * @type: is PEM or DER of the @pkcs12file. * @password: optional password used to decrypt PKCS#12 file, bags and keys. * * This function sets a certificate/private key pair and/or a CRL in * the gnutls_certificate_credentials_t structure. This function may * be called more than once (in case multiple keys/certificates exist * for the server). * * MAC:ed PKCS#12 files are supported. Encrypted PKCS#12 bags are * supported. Encrypted PKCS#8 private keys are supported. However, * only password based security, and the same password for all * operations, are supported. * * The private keys may be RSA PKCS#1 or DSA private keys encoded in * the OpenSSL way. * * PKCS#12 file may contain many keys and/or certificates, and there * is no way to identify which key/certificate pair you want. You * should make sure the PKCS#12 file only contain one key/certificate * pair and/or one CRL. * * It is believed that the limitations of this function is acceptable * for most usage, and that any more flexibility would introduce * complexity that would make it harder to use this functionality at * all. * * Returns: %GNUTLS_E_SUCCESS on success, or an error code. **/ int gnutls_certificate_set_x509_simple_pkcs12_file (gnutls_certificate_credentials_t res, const char *pkcs12file, gnutls_x509_crt_fmt_t type, const char *password) { gnutls_pkcs12_t p12; gnutls_datum_t p12blob; gnutls_x509_privkey_t key = NULL; gnutls_x509_crt_t cert = NULL; gnutls_x509_crl_t crl = NULL; int ret; size_t size; ret = gnutls_pkcs12_init (&p12); if (ret < 0) { gnutls_assert (); return ret; } p12blob.data = read_binary_file (pkcs12file, &size); p12blob.size = (unsigned int)size; if (p12blob.data == NULL) { gnutls_assert (); gnutls_pkcs12_deinit (p12); return GNUTLS_E_FILE_ERROR; } ret = gnutls_pkcs12_import (p12, &p12blob, type, 0); free (p12blob.data); if (ret < 0) { gnutls_assert (); gnutls_pkcs12_deinit (p12); return ret; } if (password) { ret = gnutls_pkcs12_verify_mac (p12, password); if (ret < 0) { gnutls_assert (); gnutls_pkcs12_deinit (p12); return ret; } } ret = parse_pkcs12 (res, p12, password, &key, &cert, &crl); gnutls_pkcs12_deinit (p12); if (ret < 0) { gnutls_assert (); return ret; } if (key && cert) { ret = gnutls_certificate_set_x509_key (res, &cert, 1, key); if (ret < 0) { gnutls_assert (); goto done; } } if (crl) { ret = gnutls_certificate_set_x509_crl (res, &crl, 1); if (ret < 0) { gnutls_assert (); goto done; } } ret = 0; done: if (cert) gnutls_x509_crt_deinit (cert); if (key) gnutls_x509_privkey_deinit (key); if (crl) gnutls_x509_crl_deinit (crl); return ret; } /** * gnutls_certificate_free_crls - Used to free all the CRLs from a gnutls_certificate_credentials_t structure * @sc: is an #gnutls_certificate_credentials_t structure. * * This function will delete all the CRLs associated * with the given credentials. * **/ void gnutls_certificate_free_crls (gnutls_certificate_credentials_t sc) { unsigned j; for (j = 0; j < sc->x509_ncrls; j++) { gnutls_x509_crl_deinit (sc->x509_crl_list[j]); } sc->x509_ncrls = 0; gnutls_free (sc->x509_crl_list); sc->x509_crl_list = NULL; } #endif