diff options
Diffstat (limited to 'src/crypto/x509v3/v3_lib.c')
| -rw-r--r-- | src/crypto/x509v3/v3_lib.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/src/crypto/x509v3/v3_lib.c b/src/crypto/x509v3/v3_lib.c new file mode 100644 index 0000000..d4e4e78 --- /dev/null +++ b/src/crypto/x509v3/v3_lib.c @@ -0,0 +1,335 @@ +/* v3_lib.c */ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project 1999. + */ +/* ==================================================================== + * Copyright (c) 1999 The OpenSSL Project. 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. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ +/* X509 v3 extension utilities */ + +#include <stdio.h> + +#include <openssl/conf.h> +#include <openssl/err.h> +#include <openssl/mem.h> +#include <openssl/obj.h> +#include <openssl/x509v3.h> + +#include "ext_dat.h" +static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL; + +static void ext_list_free(X509V3_EXT_METHOD *ext); + +static int ext_stack_cmp(const X509V3_EXT_METHOD **a, const X509V3_EXT_METHOD **b) +{ + return ((*a)->ext_nid - (*b)->ext_nid); +} + +int X509V3_EXT_add(X509V3_EXT_METHOD *ext) +{ + if(!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_stack_cmp))) { + OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_add, ERR_R_MALLOC_FAILURE); + ext_list_free(ext); + return 0; + } + if(!sk_X509V3_EXT_METHOD_push(ext_list, ext)) { + OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_add, ERR_R_MALLOC_FAILURE); + ext_list_free(ext); + return 0; + } + return 1; +} + +static int ext_cmp(const void *void_a, + const void *void_b) +{ + const X509V3_EXT_METHOD **a = (const X509V3_EXT_METHOD**) void_a; + const X509V3_EXT_METHOD **b = (const X509V3_EXT_METHOD**) void_b; + return ext_stack_cmp(a, b); +} + +const X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid) +{ + X509V3_EXT_METHOD tmp; + const X509V3_EXT_METHOD *t = &tmp, * const *ret; + size_t idx; + + if(nid < 0) return NULL; + tmp.ext_nid = nid; + ret = bsearch(&t, standard_exts, STANDARD_EXTENSION_COUNT, sizeof(X509V3_EXT_METHOD*), ext_cmp); + if(ret) return *ret; + if(!ext_list) return NULL; + + if (!sk_X509V3_EXT_METHOD_find(ext_list, &idx, &tmp)) + return NULL; + return sk_X509V3_EXT_METHOD_value(ext_list, idx); +} + +const X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext) +{ + int nid; + if((nid = OBJ_obj2nid(ext->object)) == NID_undef) return NULL; + return X509V3_EXT_get_nid(nid); +} + +int X509V3_EXT_free(int nid, void *ext_data) +{ + const X509V3_EXT_METHOD *ext_method = X509V3_EXT_get_nid(nid); + if (ext_method == NULL) + { + OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_free, X509V3_R_CANNOT_FIND_FREE_FUNCTION); + return 0; + } + + if (ext_method->it != NULL) + ASN1_item_free(ext_data, ASN1_ITEM_ptr(ext_method->it)); + else if (ext_method->ext_free != NULL) + ext_method->ext_free(ext_data); + else + { + OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_free, X509V3_R_CANNOT_FIND_FREE_FUNCTION); + return 0; + } + + return 1; +} + +int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist) +{ + for(;extlist->ext_nid!=-1;extlist++) + if(!X509V3_EXT_add(extlist)) return 0; + return 1; +} + +int X509V3_EXT_add_alias(int nid_to, int nid_from) +{ + const X509V3_EXT_METHOD *ext; + X509V3_EXT_METHOD *tmpext; + + if(!(ext = X509V3_EXT_get_nid(nid_from))) { + OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_add_alias, X509V3_R_EXTENSION_NOT_FOUND); + return 0; + } + if(!(tmpext = (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) { + OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_add_alias, ERR_R_MALLOC_FAILURE); + return 0; + } + *tmpext = *ext; + tmpext->ext_nid = nid_to; + tmpext->ext_flags |= X509V3_EXT_DYNAMIC; + return X509V3_EXT_add(tmpext); +} + +void X509V3_EXT_cleanup(void) +{ + sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free); + ext_list = NULL; +} + +static void ext_list_free(X509V3_EXT_METHOD *ext) +{ + if(ext->ext_flags & X509V3_EXT_DYNAMIC) OPENSSL_free(ext); +} + +/* Legacy function: we don't need to add standard extensions + * any more because they are now kept in ext_dat.h. + */ + +int X509V3_add_standard_extensions(void) +{ + return 1; +} + +/* Return an extension internal structure */ + +void *X509V3_EXT_d2i(X509_EXTENSION *ext) +{ + const X509V3_EXT_METHOD *method; + const unsigned char *p; + + if(!(method = X509V3_EXT_get(ext))) return NULL; + p = ext->value->data; + if(method->it) return ASN1_item_d2i(NULL, &p, ext->value->length, ASN1_ITEM_ptr(method->it)); + return method->d2i(NULL, &p, ext->value->length); +} + +/* Get critical flag and decoded version of extension from a NID. + * The "idx" variable returns the last found extension and can + * be used to retrieve multiple extensions of the same NID. + * However multiple extensions with the same NID is usually + * due to a badly encoded certificate so if idx is NULL we + * choke if multiple extensions exist. + * The "crit" variable is set to the critical value. + * The return value is the decoded extension or NULL on + * error. The actual error can have several different causes, + * the value of *crit reflects the cause: + * >= 0, extension found but not decoded (reflects critical value). + * -1 extension not found. + * -2 extension occurs more than once. + */ + +void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit, int *idx) +{ + int lastpos; + size_t i; + X509_EXTENSION *ex, *found_ex = NULL; + if(!x) { + if(idx) *idx = -1; + if(crit) *crit = -1; + return NULL; + } + if(idx) lastpos = *idx + 1; + else lastpos = 0; + if(lastpos < 0) lastpos = 0; + for(i = lastpos; i < sk_X509_EXTENSION_num(x); i++) + { + ex = sk_X509_EXTENSION_value(x, i); + if(OBJ_obj2nid(ex->object) == nid) { + if(idx) { + *idx = i; + found_ex = ex; + break; + } else if(found_ex) { + /* Found more than one */ + if(crit) *crit = -2; + return NULL; + } + found_ex = ex; + } + } + if(found_ex) { + /* Found it */ + if(crit) *crit = X509_EXTENSION_get_critical(found_ex); + return X509V3_EXT_d2i(found_ex); + } + + /* Extension not found */ + if(idx) *idx = -1; + if(crit) *crit = -1; + return NULL; +} + +/* This function is a general extension append, replace and delete utility. + * The precise operation is governed by the 'flags' value. The 'crit' and + * 'value' arguments (if relevant) are the extensions internal structure. + */ + +int X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value, + int crit, unsigned long flags) +{ + int extidx = -1; + int errcode; + X509_EXTENSION *ext, *extmp; + unsigned long ext_op = flags & X509V3_ADD_OP_MASK; + + /* If appending we don't care if it exists, otherwise + * look for existing extension. + */ + if(ext_op != X509V3_ADD_APPEND) + extidx = X509v3_get_ext_by_NID(*x, nid, -1); + + /* See if extension exists */ + if(extidx >= 0) { + /* If keep existing, nothing to do */ + if(ext_op == X509V3_ADD_KEEP_EXISTING) + return 1; + /* If default then its an error */ + if(ext_op == X509V3_ADD_DEFAULT) { + errcode = X509V3_R_EXTENSION_EXISTS; + goto err; + } + /* If delete, just delete it */ + if(ext_op == X509V3_ADD_DELETE) { + if(!sk_X509_EXTENSION_delete(*x, extidx)) return -1; + return 1; + } + } else { + /* If replace existing or delete, error since + * extension must exist + */ + if((ext_op == X509V3_ADD_REPLACE_EXISTING) || + (ext_op == X509V3_ADD_DELETE)) { + errcode = X509V3_R_EXTENSION_NOT_FOUND; + goto err; + } + } + + /* If we get this far then we have to create an extension: + * could have some flags for alternative encoding schemes... + */ + + ext = X509V3_EXT_i2d(nid, crit, value); + + if(!ext) { + OPENSSL_PUT_ERROR(X509V3, X509V3_add1_i2d, X509V3_R_ERROR_CREATING_EXTENSION); + return 0; + } + + /* If extension exists replace it.. */ + if(extidx >= 0) { + extmp = sk_X509_EXTENSION_value(*x, extidx); + X509_EXTENSION_free(extmp); + if(!sk_X509_EXTENSION_set(*x, extidx, ext)) return -1; + return 1; + } + + if(!*x && !(*x = sk_X509_EXTENSION_new_null())) return -1; + if(!sk_X509_EXTENSION_push(*x, ext)) return -1; + + return 1; + + err: + if(!(flags & X509V3_ADD_SILENT)) + OPENSSL_PUT_ERROR(X509V3, X509V3_add1_i2d, errcode); + return 0; +} |