#include <libkern/crypto/crypto_internal.h>
#include <libkern/crypto/sha1.h>
#include <kern/debug.h>
#include <corecrypto/ccdigest.h>
static uint64_t getCount(SHA1_CTX *ctx)
{
return ctx->c.b64[0];
}
static void setCount(SHA1_CTX *ctx, uint64_t count)
{
ctx->c.b64[0]=count;
}
static void DiToSHA1(const struct ccdigest_info *di, struct ccdigest_ctx *di_ctx, SHA1_CTX *sha1_ctx)
{
setCount(sha1_ctx, ccdigest_nbits(di, di_ctx)/8+ccdigest_num(di, di_ctx));
memcpy(sha1_ctx->m.b8, ccdigest_data(di, di_ctx), di->block_size);
memcpy(sha1_ctx->h.b8, ccdigest_state_ccn(di, di_ctx), di->state_size);
}
static void SHA1ToDi(const struct ccdigest_info *di, SHA1_CTX *sha1_ctx, struct ccdigest_ctx *di_ctx)
{
uint64_t count = getCount(sha1_ctx);
ccdigest_num(di, di_ctx)=count%di->block_size;
ccdigest_nbits(di, di_ctx)=(count-ccdigest_num(di, di_ctx))*8;
memcpy(ccdigest_data(di, di_ctx), sha1_ctx->m.b8, di->block_size);
memcpy(ccdigest_state_ccn(di, di_ctx), sha1_ctx->h.b8, di->state_size);
}
void SHA1Init(SHA1_CTX *ctx)
{
const struct ccdigest_info *di=g_crypto_funcs->ccsha1_di;
ccdigest_di_decl(di, di_ctx);
g_crypto_funcs->ccdigest_init_fn(di, di_ctx);
DiToSHA1(di, di_ctx, ctx);
}
void SHA1Update(SHA1_CTX *ctx, const void *data, size_t len)
{
const struct ccdigest_info *di=g_crypto_funcs->ccsha1_di;
ccdigest_di_decl(di, di_ctx);
SHA1ToDi(di, ctx, di_ctx);
g_crypto_funcs->ccdigest_update_fn(di, di_ctx, len, data);
DiToSHA1(di, di_ctx, ctx);
}
void SHA1Final(void *digest, SHA1_CTX *ctx)
{
const struct ccdigest_info *di=g_crypto_funcs->ccsha1_di;
ccdigest_di_decl(di, di_ctx);
SHA1ToDi(di, ctx, di_ctx);
ccdigest_final(di, di_ctx, digest);
}
#ifdef XNU_KERNEL_PRIVATE
void SHA1UpdateUsePhysicalAddress(SHA1_CTX *ctx, const void *data, size_t len)
{
SHA1Update(ctx, data, len);
}
#endif
void SHA1Final_r(SHA1_CTX *context, void *digest);
void SHA1Final_r(SHA1_CTX *context, void *digest)
{
SHA1Final(digest, context);
}
#include <sys/types.h>
#include <libkern/OSAtomic.h>
#include <sys/systm.h>
typedef kern_return_t (*InKernelPerformSHA1Func)(void *ref, const void *data, size_t dataLen, u_int32_t *inHash, u_int32_t options, u_int32_t *outHash, Boolean usePhysicalAddress);
void sha1_hardware_hook(Boolean option, InKernelPerformSHA1Func func, void *ref);
static void *SHA1Ref;
static InKernelPerformSHA1Func performSHA1WithinKernelOnly;
void sha1_hardware_hook(Boolean option, InKernelPerformSHA1Func func, void *ref)
{
if(option) {
OSCompareAndSwapPtr((void*)NULL, (void*)ref, (void * volatile*)&SHA1Ref);
if(!OSCompareAndSwapPtr((void *)NULL, (void *)func, (void * volatile *)&performSHA1WithinKernelOnly)) {
panic("sha1_hardware_hook: Called twice.. Should never happen\n");
}
}
else {
performSHA1WithinKernelOnly = NULL;
SHA1Ref = NULL;
}
}