diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/asn1/a_verify.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/asn1/a_verify.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/asn1/a_verify.c b/openssl-1.1.0h/crypto/asn1/a_verify.c new file mode 100644 index 0000000..fb3607c --- /dev/null +++ b/openssl-1.1.0h/crypto/asn1/a_verify.c @@ -0,0 +1,179 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <stdio.h> +#include <time.h> +#include <sys/types.h> + +#include "internal/cryptlib.h" + +#include <openssl/bn.h> +#include <openssl/x509.h> +#include <openssl/objects.h> +#include <openssl/buffer.h> +#include <openssl/evp.h> +#include "internal/asn1_int.h" +#include "internal/evp_int.h" + +#ifndef NO_ASN1_OLD + +int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature, + char *data, EVP_PKEY *pkey) +{ + EVP_MD_CTX *ctx = EVP_MD_CTX_new(); + const EVP_MD *type; + unsigned char *p, *buf_in = NULL; + int ret = -1, i, inl; + + if (ctx == NULL) { + ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE); + goto err; + } + i = OBJ_obj2nid(a->algorithm); + type = EVP_get_digestbyname(OBJ_nid2sn(i)); + if (type == NULL) { + ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); + goto err; + } + + if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) { + ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT); + goto err; + } + + inl = i2d(data, NULL); + buf_in = OPENSSL_malloc((unsigned int)inl); + if (buf_in == NULL) { + ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE); + goto err; + } + p = buf_in; + + i2d(data, &p); + ret = EVP_VerifyInit_ex(ctx, type, NULL) + && EVP_VerifyUpdate(ctx, (unsigned char *)buf_in, inl); + + OPENSSL_clear_free(buf_in, (unsigned int)inl); + + if (!ret) { + ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_EVP_LIB); + goto err; + } + ret = -1; + + if (EVP_VerifyFinal(ctx, (unsigned char *)signature->data, + (unsigned int)signature->length, pkey) <= 0) { + ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_EVP_LIB); + ret = 0; + goto err; + } + ret = 1; + err: + EVP_MD_CTX_free(ctx); + return (ret); +} + +#endif + +int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a, + ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey) +{ + EVP_MD_CTX *ctx = NULL; + unsigned char *buf_in = NULL; + int ret = -1, inl; + + int mdnid, pknid; + + if (!pkey) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_PASSED_NULL_PARAMETER); + return -1; + } + + if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT); + return -1; + } + + ctx = EVP_MD_CTX_new(); + if (ctx == NULL) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_MALLOC_FAILURE); + goto err; + } + + /* Convert signature OID into digest and public key OIDs */ + if (!OBJ_find_sigid_algs(OBJ_obj2nid(a->algorithm), &mdnid, &pknid)) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM); + goto err; + } + if (mdnid == NID_undef) { + if (!pkey->ameth || !pkey->ameth->item_verify) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, + ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM); + goto err; + } + ret = pkey->ameth->item_verify(ctx, it, asn, a, signature, pkey); + /* + * Return value of 2 means carry on, anything else means we exit + * straight away: either a fatal error of the underlying verification + * routine handles all verification. + */ + if (ret != 2) + goto err; + ret = -1; + } else { + const EVP_MD *type; + type = EVP_get_digestbynid(mdnid); + if (type == NULL) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, + ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); + goto err; + } + + /* Check public key OID matches public key type */ + if (EVP_PKEY_type(pknid) != pkey->ameth->pkey_id) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_WRONG_PUBLIC_KEY_TYPE); + goto err; + } + + if (!EVP_DigestVerifyInit(ctx, NULL, type, NULL, pkey)) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB); + ret = 0; + goto err; + } + + } + + inl = ASN1_item_i2d(asn, &buf_in, it); + + if (buf_in == NULL) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_MALLOC_FAILURE); + goto err; + } + + ret = EVP_DigestVerifyUpdate(ctx, buf_in, inl); + + OPENSSL_clear_free(buf_in, (unsigned int)inl); + + if (!ret) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB); + goto err; + } + ret = -1; + + if (EVP_DigestVerifyFinal(ctx, signature->data, + (size_t)signature->length) <= 0) { + ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB); + ret = 0; + goto err; + } + ret = 1; + err: + EVP_MD_CTX_free(ctx); + return (ret); +} |