diff options
Diffstat (limited to 'src/crypto/x509/a_verify.c')
| -rw-r--r-- | src/crypto/x509/a_verify.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/crypto/x509/a_verify.c b/src/crypto/x509/a_verify.c new file mode 100644 index 0000000..72e0a62 --- /dev/null +++ b/src/crypto/x509/a_verify.c @@ -0,0 +1,133 @@ +/* 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 <openssl/x509.h> + +#include <stdio.h> +#include <time.h> +#include <sys/types.h> + +#include <openssl/bn.h> +#include <openssl/buf.h> +#include <openssl/digest.h> +#include <openssl/err.h> +#include <openssl/evp.h> +#include <openssl/mem.h> +#include <openssl/obj.h> + +#include "../evp/internal.h" + + +int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a, + ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey) + { + EVP_MD_CTX ctx; + uint8_t *buf_in = NULL; + int ret = 0, inl; + + if (!pkey) + { + OPENSSL_PUT_ERROR(X509, ASN1_item_verify, ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + + if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) + { + OPENSSL_PUT_ERROR(X509, ASN1_item_verify, X509_R_INVALID_BIT_STRING_BITS_LEFT); + return 0; + } + + EVP_MD_CTX_init(&ctx); + + if (!EVP_DigestVerifyInitFromAlgorithm(&ctx, a, pkey)) + { + goto err; + } + + inl = ASN1_item_i2d(asn, &buf_in, it); + + if (buf_in == NULL) + { + OPENSSL_PUT_ERROR(X509, ASN1_item_verify, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (!EVP_DigestVerifyUpdate(&ctx,buf_in,inl)) + { + OPENSSL_cleanse(buf_in,(unsigned int)inl); + OPENSSL_free(buf_in); + OPENSSL_PUT_ERROR(X509, ASN1_item_verify, ERR_R_EVP_LIB); + goto err; + } + + OPENSSL_cleanse(buf_in,(unsigned int)inl); + OPENSSL_free(buf_in); + + if (EVP_DigestVerifyFinal(&ctx,signature->data, + (size_t)signature->length) <= 0) + { + OPENSSL_PUT_ERROR(X509, ASN1_item_verify, ERR_R_EVP_LIB); + goto err; + } + /* we don't need to zero the 'ctx' because we just checked + * public information */ + /* memset(&ctx,0,sizeof(ctx)); */ + ret = 1; +err: + EVP_MD_CTX_cleanup(&ctx); + return ret; + } + |