#include <stdio.h>
#include <string.h>
#include <openssl/opensslconf.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include "err_local.h"
#include "evp_local.h"
int
EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
{
EVP_MD_CTX_legacy_clear(ctx);
return EVP_DigestInit_ex(ctx, type, NULL);
}
LCRYPTO_ALIAS(EVP_DigestInit);
int
EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
{
EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
if (ctx->digest != type) {
if (ctx->digest && ctx->digest->ctx_size && ctx->md_data &&
!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
freezero(ctx->md_data, ctx->digest->ctx_size);
ctx->md_data = NULL;
}
ctx->digest = type;
if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
ctx->update = type->update;
ctx->md_data = calloc(1, type->ctx_size);
if (ctx->md_data == NULL) {
EVP_PKEY_CTX_free(ctx->pctx);
ctx->pctx = NULL;
EVPerror(ERR_R_MALLOC_FAILURE);
return 0;
}
}
}
if (ctx->pctx) {
int r;
r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
if (r <= 0 && (r != -2))
return 0;
}
if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
return 1;
return ctx->digest->init(ctx);
}
LCRYPTO_ALIAS(EVP_DigestInit_ex);
int
EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
{
return ctx->update(ctx, data, count);
}
LCRYPTO_ALIAS(EVP_DigestUpdate);
int
EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
{
int ret;
ret = EVP_DigestFinal_ex(ctx, md, size);
EVP_MD_CTX_cleanup(ctx);
return ret;
}
LCRYPTO_ALIAS(EVP_DigestFinal);
int
EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
{
int ret;
if ((size_t)ctx->digest->md_size > EVP_MAX_MD_SIZE) {
EVPerror(EVP_R_TOO_LARGE);
return 0;
}
ret = ctx->digest->final(ctx, md);
if (size != NULL)
*size = ctx->digest->md_size;
if (ctx->digest->cleanup) {
ctx->digest->cleanup(ctx);
EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
}
memset(ctx->md_data, 0, ctx->digest->ctx_size);
return ret;
}
LCRYPTO_ALIAS(EVP_DigestFinal_ex);
int
EVP_Digest(const void *data, size_t count,
unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl)
{
EVP_MD_CTX ctx;
int ret;
EVP_MD_CTX_legacy_clear(&ctx);
EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_ONESHOT);
ret = EVP_DigestInit_ex(&ctx, type, NULL) &&
EVP_DigestUpdate(&ctx, data, count) &&
EVP_DigestFinal_ex(&ctx, md, size);
EVP_MD_CTX_cleanup(&ctx);
return ret;
}
LCRYPTO_ALIAS(EVP_Digest);
EVP_MD_CTX *
EVP_MD_CTX_new(void)
{
return calloc(1, sizeof(EVP_MD_CTX));
}
LCRYPTO_ALIAS(EVP_MD_CTX_new);
void
EVP_MD_CTX_free(EVP_MD_CTX *ctx)
{
if (ctx == NULL)
return;
EVP_MD_CTX_cleanup(ctx);
free(ctx);
}
LCRYPTO_ALIAS(EVP_MD_CTX_free);
EVP_MD_CTX *
EVP_MD_CTX_create(void)
{
return EVP_MD_CTX_new();
}
LCRYPTO_ALIAS(EVP_MD_CTX_create);
void
EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
{
EVP_MD_CTX_free(ctx);
}
LCRYPTO_ALIAS(EVP_MD_CTX_destroy);
void
EVP_MD_CTX_legacy_clear(EVP_MD_CTX *ctx)
{
memset(ctx, 0, sizeof(*ctx));
}
int
EVP_MD_CTX_init(EVP_MD_CTX *ctx)
{
return EVP_MD_CTX_cleanup(ctx);
}
LCRYPTO_ALIAS(EVP_MD_CTX_init);
int
EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
{
return EVP_MD_CTX_cleanup(ctx);
}
LCRYPTO_ALIAS(EVP_MD_CTX_reset);
int
EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
{
if (ctx == NULL)
return 1;
if (ctx->digest && ctx->digest->cleanup &&
!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
ctx->digest->cleanup(ctx);
if (ctx->digest && ctx->digest->ctx_size && ctx->md_data &&
!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE))
freezero(ctx->md_data, ctx->digest->ctx_size);
if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
EVP_PKEY_CTX_free(ctx->pctx);
memset(ctx, 0, sizeof(*ctx));
return 1;
}
LCRYPTO_ALIAS(EVP_MD_CTX_cleanup);
int
EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
{
EVP_MD_CTX_legacy_clear(out);
return EVP_MD_CTX_copy_ex(out, in);
}
LCRYPTO_ALIAS(EVP_MD_CTX_copy);
int
EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
{
unsigned char *tmp_buf;
if ((in == NULL) || (in->digest == NULL)) {
EVPerror(EVP_R_INPUT_NOT_INITIALIZED);
return 0;
}
if (out->digest == in->digest) {
tmp_buf = out->md_data;
EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
} else
tmp_buf = NULL;
EVP_MD_CTX_cleanup(out);
memcpy(out, in, sizeof *out);
out->md_data = NULL;
out->pctx = NULL;
EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
if (in->md_data && out->digest->ctx_size) {
if (tmp_buf) {
out->md_data = tmp_buf;
} else {
out->md_data = calloc(1, out->digest->ctx_size);
if (out->md_data == NULL) {
EVPerror(ERR_R_MALLOC_FAILURE);
return 0;
}
}
memcpy(out->md_data, in->md_data, out->digest->ctx_size);
}
out->update = in->update;
if (in->pctx) {
out->pctx = EVP_PKEY_CTX_dup(in->pctx);
if (!out->pctx) {
EVP_MD_CTX_cleanup(out);
return 0;
}
}
if (out->digest->copy)
return out->digest->copy(out, in);
return 1;
}
LCRYPTO_ALIAS(EVP_MD_CTX_copy_ex);
int
EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
{
int ret;
if (!ctx->digest) {
EVPerror(EVP_R_NO_CIPHER_SET);
return 0;
}
if (!ctx->digest->md_ctrl) {
EVPerror(EVP_R_CTRL_NOT_IMPLEMENTED);
return 0;
}
ret = ctx->digest->md_ctrl(ctx, type, arg, ptr);
if (ret == -1) {
EVPerror(EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
return 0;
}
return ret;
}
LCRYPTO_ALIAS(EVP_MD_CTX_ctrl);
const EVP_MD *
EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
{
if (!ctx)
return NULL;
return ctx->digest;
}
LCRYPTO_ALIAS(EVP_MD_CTX_md);
void
EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
{
ctx->flags &= ~flags;
}
LCRYPTO_ALIAS(EVP_MD_CTX_clear_flags);
void
EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
{
ctx->flags |= flags;
}
LCRYPTO_ALIAS(EVP_MD_CTX_set_flags);
int
EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
{
return (ctx->flags & flags);
}
LCRYPTO_ALIAS(EVP_MD_CTX_test_flags);
void *
EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
{
return ctx->md_data;
}
LCRYPTO_ALIAS(EVP_MD_CTX_md_data);
EVP_PKEY_CTX *
EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
{
return ctx->pctx;
}
LCRYPTO_ALIAS(EVP_MD_CTX_pkey_ctx);
void
EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx)
{
if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX)) {
EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
} else {
EVP_PKEY_CTX_free(ctx->pctx);
}
ctx->pctx = pctx;
if (pctx != NULL) {
EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
}
}
LCRYPTO_ALIAS(EVP_MD_CTX_set_pkey_ctx);
int
EVP_MD_type(const EVP_MD *md)
{
return md->type;
}
LCRYPTO_ALIAS(EVP_MD_type);
int
EVP_MD_pkey_type(const EVP_MD *md)
{
return md->pkey_type;
}
LCRYPTO_ALIAS(EVP_MD_pkey_type);
int
EVP_MD_size(const EVP_MD *md)
{
if (!md) {
EVPerror(EVP_R_MESSAGE_DIGEST_IS_NULL);
return -1;
}
return md->md_size;
}
LCRYPTO_ALIAS(EVP_MD_size);
unsigned long
EVP_MD_flags(const EVP_MD *md)
{
return md->flags;
}
LCRYPTO_ALIAS(EVP_MD_flags);
int
EVP_MD_block_size(const EVP_MD *md)
{
return md->block_size;
}
LCRYPTO_ALIAS(EVP_MD_block_size);
