diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/asn1/a_sign.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/asn1/a_sign.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/asn1/a_sign.c b/openssl-1.1.0h/crypto/asn1/a_sign.c new file mode 100644 index 0000000..3b261eb --- /dev/null +++ b/openssl-1.1.0h/crypto/asn1/a_sign.c @@ -0,0 +1,225 @@ +/* + * 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/evp.h> +#include <openssl/x509.h> +#include <openssl/objects.h> +#include <openssl/buffer.h> +#include "internal/asn1_int.h" +#include "internal/evp_int.h" + +#ifndef NO_ASN1_OLD + +int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2, + ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey, + const EVP_MD *type) +{ + EVP_MD_CTX *ctx = EVP_MD_CTX_new(); + unsigned char *p, *buf_in = NULL, *buf_out = NULL; + int i, inl = 0, outl = 0, outll = 0; + X509_ALGOR *a; + + if (ctx == NULL) { + ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE); + goto err; + } + for (i = 0; i < 2; i++) { + if (i == 0) + a = algor1; + else + a = algor2; + if (a == NULL) + continue; + if (type->pkey_type == NID_dsaWithSHA1) { + /* + * special case: RFC 2459 tells us to omit 'parameters' with + * id-dsa-with-sha1 + */ + ASN1_TYPE_free(a->parameter); + a->parameter = NULL; + } else if ((a->parameter == NULL) || + (a->parameter->type != V_ASN1_NULL)) { + ASN1_TYPE_free(a->parameter); + if ((a->parameter = ASN1_TYPE_new()) == NULL) + goto err; + a->parameter->type = V_ASN1_NULL; + } + ASN1_OBJECT_free(a->algorithm); + a->algorithm = OBJ_nid2obj(type->pkey_type); + if (a->algorithm == NULL) { + ASN1err(ASN1_F_ASN1_SIGN, ASN1_R_UNKNOWN_OBJECT_TYPE); + goto err; + } + if (a->algorithm->length == 0) { + ASN1err(ASN1_F_ASN1_SIGN, + ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); + goto err; + } + } + inl = i2d(data, NULL); + buf_in = OPENSSL_malloc((unsigned int)inl); + outll = outl = EVP_PKEY_size(pkey); + buf_out = OPENSSL_malloc((unsigned int)outl); + if ((buf_in == NULL) || (buf_out == NULL)) { + outl = 0; + ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE); + goto err; + } + p = buf_in; + + i2d(data, &p); + if (!EVP_SignInit_ex(ctx, type, NULL) + || !EVP_SignUpdate(ctx, (unsigned char *)buf_in, inl) + || !EVP_SignFinal(ctx, (unsigned char *)buf_out, + (unsigned int *)&outl, pkey)) { + outl = 0; + ASN1err(ASN1_F_ASN1_SIGN, ERR_R_EVP_LIB); + goto err; + } + OPENSSL_free(signature->data); + signature->data = buf_out; + buf_out = NULL; + signature->length = outl; + /* + * In the interests of compatibility, I'll make sure that the bit string + * has a 'not-used bits' value of 0 + */ + signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); + signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; + err: + EVP_MD_CTX_free(ctx); + OPENSSL_clear_free((char *)buf_in, (unsigned int)inl); + OPENSSL_clear_free((char *)buf_out, outll); + return (outl); +} + +#endif + +int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, + X509_ALGOR *algor2, ASN1_BIT_STRING *signature, void *asn, + EVP_PKEY *pkey, const EVP_MD *type) +{ + int rv; + EVP_MD_CTX *ctx = EVP_MD_CTX_new(); + + if (ctx == NULL) { + ASN1err(ASN1_F_ASN1_ITEM_SIGN, ERR_R_MALLOC_FAILURE); + return 0; + } + if (!EVP_DigestSignInit(ctx, NULL, type, NULL, pkey)) { + EVP_MD_CTX_free(ctx); + return 0; + } + + rv = ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, ctx); + + EVP_MD_CTX_free(ctx); + return rv; +} + +int ASN1_item_sign_ctx(const ASN1_ITEM *it, + X509_ALGOR *algor1, X509_ALGOR *algor2, + ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx) +{ + const EVP_MD *type; + EVP_PKEY *pkey; + unsigned char *buf_in = NULL, *buf_out = NULL; + size_t inl = 0, outl = 0, outll = 0; + int signid, paramtype; + int rv; + + type = EVP_MD_CTX_md(ctx); + pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_pkey_ctx(ctx)); + + if (type == NULL || pkey == NULL) { + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED); + goto err; + } + + if (pkey->ameth == NULL) { + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); + goto err; + } + + if (pkey->ameth->item_sign) { + rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2, signature); + if (rv == 1) + outl = signature->length; + /*- + * Return value meanings: + * <=0: error. + * 1: method does everything. + * 2: carry on as normal. + * 3: ASN1 method sets algorithm identifiers: just sign. + */ + if (rv <= 0) + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB); + if (rv <= 1) + goto err; + } else + rv = 2; + + if (rv == 2) { + if (!OBJ_find_sigid_by_algs(&signid, + EVP_MD_nid(type), + pkey->ameth->pkey_id)) { + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, + ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); + goto err; + } + + if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) + paramtype = V_ASN1_NULL; + else + paramtype = V_ASN1_UNDEF; + + if (algor1) + X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL); + if (algor2) + X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL); + + } + + inl = ASN1_item_i2d(asn, &buf_in, it); + outll = outl = EVP_PKEY_size(pkey); + buf_out = OPENSSL_malloc((unsigned int)outl); + if ((buf_in == NULL) || (buf_out == NULL)) { + outl = 0; + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (!EVP_DigestSignUpdate(ctx, buf_in, inl) + || !EVP_DigestSignFinal(ctx, buf_out, &outl)) { + outl = 0; + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB); + goto err; + } + OPENSSL_free(signature->data); + signature->data = buf_out; + buf_out = NULL; + signature->length = outl; + /* + * In the interests of compatibility, I'll make sure that the bit string + * has a 'not-used bits' value of 0 + */ + signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); + signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; + err: + OPENSSL_clear_free((char *)buf_in, (unsigned int)inl); + OPENSSL_clear_free((char *)buf_out, outll); + return (outl); +} |