crypto/rsa/rsa_lib.c:255: error: BUFFER_OVERRUN_L3
  Offset: [3, +oo] (⇐ [0, +oo] + 3) Size: [0, +oo] by call to `BN_BLINDING_new`.
Showing all 13 steps of the trace


crypto/rsa/rsa_lib.c:250:7: Call
248.   	A= &(ctx->bn[0]);
249.   	ctx->tos++;
250.   	if (!BN_rand(A,BN_num_bits(rsa->n)-1,1,0)) goto err;
             ^
251.   	if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
252.   

crypto/bn/bn_rand.c:65:1: Parameter `rnd->top`
  63.   #include <openssl/rand.h>
  64.   
  65. > int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)
  66.   	{
  67.   	unsigned char *buf=NULL;

crypto/rsa/rsa_lib.c:255:16: Call
253.   	if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))
254.   	    goto err;
255.   	rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n);
                      ^
256.   	ctx->tos--;
257.   	rsa->flags|=RSA_FLAG_BLINDING;

crypto/bn/bn_blind.c:63:1: Parameter `A->top`
  61.   #include "bn_lcl.h"
  62.   
  63. > BN_BLINDING *BN_BLINDING_new(BIGNUM *A, BIGNUM *Ai, BIGNUM *mod)
  64.   	{
  65.   	BN_BLINDING *ret=NULL;

crypto/bn/bn_blind.c:78:7: Call
  76.   	if ((ret->A=BN_new()) == NULL) goto err;
  77.   	if ((ret->Ai=BN_new()) == NULL) goto err;
  78.   	if (!BN_copy(ret->A,A)) goto err;
              ^
  79.   	if (!BN_copy(ret->Ai,Ai)) goto err;
  80.   	ret->mod=mod;

crypto/bn/bn_lib.c:499:1: Parameter `*a->d`
    497.   	}
    498.   
    499. > BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
    500.   	{
    501.   	int i;

crypto/bn/bn_blind.c:79:7: Call
  77.   	if ((ret->Ai=BN_new()) == NULL) goto err;
  78.   	if (!BN_copy(ret->A,A)) goto err;
  79.   	if (!BN_copy(ret->Ai,Ai)) goto err;
              ^
  80.   	ret->mod=mod;
  81.   	return(ret);

crypto/bn/bn_lib.c:499:1: Parameter `*a->d`
    497.   	}
    498.   
    499. > BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
    500.   	{
    501.   	int i;

crypto/bn/bn_lib.c:508:6: Call
    506.   
    507.   	if (a == b) return(a);
    508.   	if (bn_wexpand(a,b->top) == NULL) return(NULL);
                ^
    509.   
    510.   #if 1

crypto/bn/bn_lib.c:344:1: <Length trace>
342.   	}
343.   
344. > BIGNUM *bn_expand2(BIGNUM *b, int words)
345.   	{
346.   	BN_ULONG *A,*a;

crypto/bn/bn_lib.c:344:1: Parameter `*b->d`
      342.   	}
      343.   
      344. > BIGNUM *bn_expand2(BIGNUM *b, int words)
      345.   	{
      346.   	BN_ULONG *A,*a;

crypto/bn/bn_lib.c:367:3: Assignment
      365.   			}
      366.   #if 1
      367.   		B=b->d;
               ^
      368.   		/* Check if the previous number needs to be copied */
      369.   		if (B != NULL)

crypto/bn/bn_lib.c:447:35: Array access: Offset: [3, +oo] (⇐ [0, +oo] + 3) Size: [0, +oo] by call to `BN_BLINDING_new` 
      445.   				 */
      446.   				BN_ULONG a0,a1,a2,a3;
      447.   				a0=B[0]; a1=B[1]; a2=B[2]; a3=B[3];
                                               ^
      448.   				A[0]=a0; A[1]=a1; A[2]=a2; A[3]=a3;
      449.   				}

BIGNUM *bn_expand2(BIGNUM *b, int words)
	{
	BN_ULONG *A,*a;
	const BN_ULONG *B;
	int i;
	bn_check_top(b);
	if (words > b->max)
		{
		bn_check_top(b);
		if (BN_get_flags(b,BN_FLG_STATIC_DATA))
			{
			BNerr(BN_F_BN_EXPAND2,BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);
			return(NULL);
			}
		a=A=(BN_ULONG *)Malloc(sizeof(BN_ULONG)*(words+1));
		if (A == NULL)
			{
			BNerr(BN_F_BN_EXPAND2,ERR_R_MALLOC_FAILURE);
			return(NULL);
			}
#if 1
		B=b->d;
		if (B != NULL)
			{
#if 0
			for (i=b->top&(~7); i>0; i-=8)
				{
				A[0]=B[0]; A[1]=B[1]; A[2]=B[2]; A[3]=B[3];
				A[4]=B[4]; A[5]=B[5]; A[6]=B[6]; A[7]=B[7];
				A+=8;
				B+=8;
				}
			switch (b->top&7)
				{
			case 7:
				A[6]=B[6];
			case 6:
				A[5]=B[5];
			case 5:
				A[4]=B[4];
			case 4:
				A[3]=B[3];
			case 3:
				A[2]=B[2];
			case 2:
				A[1]=B[1];
			case 1:
				A[0]=B[0];
			case 0:
				;
				}
#else
			for (i=b->top>>2; i>0; i--,A+=4,B+=4)
				{
				BN_ULONG a0,a1,a2,a3;
				a0=B[0]; a1=B[1]; a2=B[2]; a3=B[3];
				A[0]=a0; A[1]=a1; A[2]=a2; A[3]=a3;
				}
			switch (b->top&3)
				{
				case 3:	A[2]=B[2];
				case 2:	A[1]=B[1];
				case 1:	A[0]=B[0];
				case 0:	;
				}
#endif
			Free(b->d);
			}
		b->d=a;
		b->max=words;
		A= &(b->d[b->top]);
		for (i=(b->max - b->top)>>3; i>0; i--,A+=8)
			{
			A[0]=0; A[1]=0; A[2]=0; A[3]=0;
			A[4]=0; A[5]=0; A[6]=0; A[7]=0;
			}
		for (i=(b->max - b->top)&7; i>0; i--,A++)
			A[0]=0;
#else
			memset(A,0,sizeof(BN_ULONG)*(words+1));
			memcpy(A,b->d,sizeof(b->d[0])*b->top);
			b->d=a;
			b->max=words;
#endif
		}
	return(b);
	}
['int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)\n\t{\n\tBIGNUM *A,*Ai;\n\tBN_CTX *ctx;\n\tint ret=0;\n\tif (p_ctx == NULL)\n\t\t{\n\t\tif ((ctx=BN_CTX_new()) == NULL) goto err;\n\t\t}\n\telse\n\t\tctx=p_ctx;\n\tif (rsa->blinding != NULL)\n\t\tBN_BLINDING_free(rsa->blinding);\n\tA= &(ctx->bn[0]);\n\tctx->tos++;\n\tif (!BN_rand(A,BN_num_bits(rsa->n)-1,1,0)) goto err;\n\tif ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;\n\tif (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))\n\t    goto err;\n\trsa->blinding=BN_BLINDING_new(A,Ai,rsa->n);\n\tctx->tos--;\n\trsa->flags|=RSA_FLAG_BLINDING;\n\tBN_free(Ai);\n\tret=1;\nerr:\n\tif (ctx != p_ctx) BN_CTX_free(ctx);\n\treturn(ret);\n\t}', 'int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)\n\t{\n\tunsigned char *buf=NULL;\n\tint ret=0,bit,bytes,mask;\n\ttime_t tim;\n\tbytes=(bits+7)/8;\n\tbit=(bits-1)%8;\n\tmask=0xff<<bit;\n\tbuf=(unsigned char *)Malloc(bytes);\n\tif (buf == NULL)\n\t\t{\n\t\tBNerr(BN_F_BN_RAND,ERR_R_MALLOC_FAILURE);\n\t\tgoto err;\n\t\t}\n\ttime(&tim);\n\tRAND_seed(&tim,sizeof(tim));\n\tRAND_bytes(buf,(int)bytes);\n\tif (top)\n\t\t{\n\t\tif (bit == 0)\n\t\t\t{\n\t\t\tbuf[0]=1;\n\t\t\tbuf[1]|=0x80;\n\t\t\t}\n\t\telse\n\t\t\t{\n\t\t\tbuf[0]|=(3<<(bit-1));\n\t\t\tbuf[0]&= ~(mask<<1);\n\t\t\t}\n\t\t}\n\telse\n\t\t{\n\t\tbuf[0]|=(1<<bit);\n\t\tbuf[0]&= ~(mask<<1);\n\t\t}\n\tif (bottom)\n\t\tbuf[bytes-1]|=1;\n\tif (!BN_bin2bn(buf,bytes,rnd)) goto err;\n\tret=1;\nerr:\n\tif (buf != NULL)\n\t\t{\n\t\tmemset(buf,0,bytes);\n\t\tFree(buf);\n\t\t}\n\treturn(ret);\n\t}', 'BN_BLINDING *BN_BLINDING_new(BIGNUM *A, BIGNUM *Ai, BIGNUM *mod)\n\t{\n\tBN_BLINDING *ret=NULL;\n\tbn_check_top(Ai);\n\tbn_check_top(mod);\n\tif ((ret=(BN_BLINDING *)Malloc(sizeof(BN_BLINDING))) == NULL)\n\t\t{\n\t\tBNerr(BN_F_BN_BLINDING_NEW,ERR_R_MALLOC_FAILURE);\n\t\treturn(NULL);\n\t\t}\n\tmemset(ret,0,sizeof(BN_BLINDING));\n\tif ((ret->A=BN_new()) == NULL) goto err;\n\tif ((ret->Ai=BN_new()) == NULL) goto err;\n\tif (!BN_copy(ret->A,A)) goto err;\n\tif (!BN_copy(ret->Ai,Ai)) goto err;\n\tret->mod=mod;\n\treturn(ret);\nerr:\n\tif (ret != NULL) BN_BLINDING_free(ret);\n\treturn(NULL);\n\t}', 'BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)\n\t{\n\tint i;\n\tBN_ULONG *A;\n\tconst BN_ULONG *B;\n\tbn_check_top(b);\n\tif (a == b) return(a);\n\tif (bn_wexpand(a,b->top) == NULL) return(NULL);\n#if 1\n\tA=a->d;\n\tB=b->d;\n\tfor (i=b->top>>2; i>0; i--,A+=4,B+=4)\n\t\t{\n\t\tBN_ULONG a0,a1,a2,a3;\n\t\ta0=B[0]; a1=B[1]; a2=B[2]; a3=B[3];\n\t\tA[0]=a0; A[1]=a1; A[2]=a2; A[3]=a3;\n\t\t}\n\tswitch (b->top&3)\n\t\t{\n\t\tcase 3: A[2]=B[2];\n\t\tcase 2: A[1]=B[1];\n\t\tcase 1: A[0]=B[0];\n\t\tcase 0: ;\n\t\t}\n#else\n\tmemcpy(a->d,b->d,sizeof(b->d[0])*b->top);\n#endif\n\ta->top=b->top;\n\tif ((a->top == 0) && (a->d != NULL))\n\t\ta->d[0]=0;\n\ta->neg=b->neg;\n\treturn(a);\n\t}', 'BIGNUM *bn_expand2(BIGNUM *b, int words)\n\t{\n\tBN_ULONG *A,*a;\n\tconst BN_ULONG *B;\n\tint i;\n\tbn_check_top(b);\n\tif (words > b->max)\n\t\t{\n\t\tbn_check_top(b);\n\t\tif (BN_get_flags(b,BN_FLG_STATIC_DATA))\n\t\t\t{\n\t\t\tBNerr(BN_F_BN_EXPAND2,BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);\n\t\t\treturn(NULL);\n\t\t\t}\n\t\ta=A=(BN_ULONG *)Malloc(sizeof(BN_ULONG)*(words+1));\n\t\tif (A == NULL)\n\t\t\t{\n\t\t\tBNerr(BN_F_BN_EXPAND2,ERR_R_MALLOC_FAILURE);\n\t\t\treturn(NULL);\n\t\t\t}\n#if 1\n\t\tB=b->d;\n\t\tif (B != NULL)\n\t\t\t{\n#if 0\n\t\t\tfor (i=b->top&(~7); i>0; i-=8)\n\t\t\t\t{\n\t\t\t\tA[0]=B[0]; A[1]=B[1]; A[2]=B[2]; A[3]=B[3];\n\t\t\t\tA[4]=B[4]; A[5]=B[5]; A[6]=B[6]; A[7]=B[7];\n\t\t\t\tA+=8;\n\t\t\t\tB+=8;\n\t\t\t\t}\n\t\t\tswitch (b->top&7)\n\t\t\t\t{\n\t\t\tcase 7:\n\t\t\t\tA[6]=B[6];\n\t\t\tcase 6:\n\t\t\t\tA[5]=B[5];\n\t\t\tcase 5:\n\t\t\t\tA[4]=B[4];\n\t\t\tcase 4:\n\t\t\t\tA[3]=B[3];\n\t\t\tcase 3:\n\t\t\t\tA[2]=B[2];\n\t\t\tcase 2:\n\t\t\t\tA[1]=B[1];\n\t\t\tcase 1:\n\t\t\t\tA[0]=B[0];\n\t\t\tcase 0:\n\t\t\t\t;\n\t\t\t\t}\n#else\n\t\t\tfor (i=b->top>>2; i>0; i--,A+=4,B+=4)\n\t\t\t\t{\n\t\t\t\tBN_ULONG a0,a1,a2,a3;\n\t\t\t\ta0=B[0]; a1=B[1]; a2=B[2]; a3=B[3];\n\t\t\t\tA[0]=a0; A[1]=a1; A[2]=a2; A[3]=a3;\n\t\t\t\t}\n\t\t\tswitch (b->top&3)\n\t\t\t\t{\n\t\t\t\tcase 3:\tA[2]=B[2];\n\t\t\t\tcase 2:\tA[1]=B[1];\n\t\t\t\tcase 1:\tA[0]=B[0];\n\t\t\t\tcase 0:\t;\n\t\t\t\t}\n#endif\n\t\t\tFree(b->d);\n\t\t\t}\n\t\tb->d=a;\n\t\tb->max=words;\n\t\tA= &(b->d[b->top]);\n\t\tfor (i=(b->max - b->top)>>3; i>0; i--,A+=8)\n\t\t\t{\n\t\t\tA[0]=0; A[1]=0; A[2]=0; A[3]=0;\n\t\t\tA[4]=0; A[5]=0; A[6]=0; A[7]=0;\n\t\t\t}\n\t\tfor (i=(b->max - b->top)&7; i>0; i--,A++)\n\t\t\tA[0]=0;\n#else\n\t\t\tmemset(A,0,sizeof(BN_ULONG)*(words+1));\n\t\t\tmemcpy(A,b->d,sizeof(b->d[0])*b->top);\n\t\t\tb->d=a;\n\t\t\tb->max=words;\n#endif\n\t\t}\n\treturn(b);\n\t}']