Update openssl to version openssl-1.0.1m

Conflicts:
	openssl/Makefile
	openssl/Makefile.bak
	openssl/crypto/cryptlib.c

1 files changed, 361 insertions, 357 deletions

diff --git a/openssl/crypto/asn1/a_int.c b/openssl/crypto/asn1/a_int.c
index 297c45a9f..70c2b8e62 100644
--- a/openssl/crypto/asn1/a_int.c
+++ b/openssl/crypto/asn1/a_int.c
@@ -5,21 +5,21 @@
  * This package is an SSL implementation written
  * by Eric Young (eay@cryptsoft.com).
  * The implementation was written so as to conform with Netscapes SSL.
- * 
+ *
  * This library is free for commercial and non-commercial use as long as
  * the following conditions are aheared to.  The following conditions
  * apply to all code found in this distribution, be it the RC4, RSA,
  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  * included with this distribution is covered by the same copyright terms
  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
+ *
  * Copyright remains Eric Young's, and as such any Copyright notices in
  * the code are not to be removed.
  * If this package is used in a product, Eric Young should be given attribution
  * as the author of the parts of the library used.
  * This can be in the form of a textual message at program startup or
  * in documentation (online or textual) provided with the package.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ -34,10 +34,10 @@
  *     Eric Young (eay@cryptsoft.com)"
  *    The word 'cryptographic' can be left out if the rouines from the library
  *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
+ * 4. If you include any Windows specific code (or a derivative thereof) from
  *    the apps directory (application code) you must include an acknowledgement:
  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -49,7 +49,7 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- * 
+ *
  * The licence and distribution terms for any publically available version or
  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  * copied and put under another distribution licence
@@ -62,45 +62,45 @@
 #include <openssl/bn.h>
 
 ASN1_INTEGER *ASN1_INTEGER_dup(const ASN1_INTEGER *x)
-{ return M_ASN1_INTEGER_dup(x);}
+{
+    return M_ASN1_INTEGER_dup(x);
+}
 
 int ASN1_INTEGER_cmp(const ASN1_INTEGER *x, const ASN1_INTEGER *y)
-	{ 
-	int neg, ret;
-	/* Compare signs */
-	neg = x->type & V_ASN1_NEG;
-	if (neg != (y->type & V_ASN1_NEG))
-		{
-		if (neg)
-			return -1;
-		else
-			return 1;
-		}
-
-	ret = ASN1_STRING_cmp(x, y);
-
-	if (neg)
-		return -ret;
-	else
-		return ret;
-	}
-	
-
-/* 
+{
+    int neg, ret;
+    /* Compare signs */
+    neg = x->type & V_ASN1_NEG;
+    if (neg != (y->type & V_ASN1_NEG)) {
+        if (neg)
+            return -1;
+        else
+            return 1;
+    }
+
+    ret = ASN1_STRING_cmp(x, y);
+
+    if (neg)
+        return -ret;
+    else
+        return ret;
+}
+
+/*-
  * This converts an ASN1 INTEGER into its content encoding.
  * The internal representation is an ASN1_STRING whose data is a big endian
  * representation of the value, ignoring the sign. The sign is determined by
- * the type: V_ASN1_INTEGER for positive and V_ASN1_NEG_INTEGER for negative. 
+ * the type: V_ASN1_INTEGER for positive and V_ASN1_NEG_INTEGER for negative.
  *
  * Positive integers are no problem: they are almost the same as the DER
  * encoding, except if the first byte is >= 0x80 we need to add a zero pad.
  *
  * Negative integers are a bit trickier...
  * The DER representation of negative integers is in 2s complement form.
- * The internal form is converted by complementing each octet and finally 
+ * The internal form is converted by complementing each octet and finally
  * adding one to the result. This can be done less messily with a little trick.
  * If the internal form has trailing zeroes then they will become FF by the
- * complement and 0 by the add one (due to carry) so just copy as many trailing 
+ * complement and 0 by the add one (due to carry) so just copy as many trailing
  * zeros to the destination as there are in the source. The carry will add one
  * to the last none zero octet: so complement this octet and add one and finally
  * complement any left over until you get to the start of the string.
@@ -112,347 +112,351 @@ int ASN1_INTEGER_cmp(const ASN1_INTEGER *x, const ASN1_INTEGER *y)
  */
 
 int i2c_ASN1_INTEGER(ASN1_INTEGER *a, unsigned char **pp)
-	{
-	int pad=0,ret,i,neg;
-	unsigned char *p,*n,pb=0;
-
-	if (a == NULL) return(0);
-	neg=a->type & V_ASN1_NEG;
-	if (a->length == 0)
-		ret=1;
-	else
-		{
-		ret=a->length;
-		i=a->data[0];
-		if (!neg && (i > 127)) {
-			pad=1;
-			pb=0;
-		} else if(neg) {
-			if(i>128) {
-				pad=1;
-				pb=0xFF;
-			} else if(i == 128) {
-			/*
-			 * Special case: if any other bytes non zero we pad:
-			 * otherwise we don't.
-			 */
-				for(i = 1; i < a->length; i++) if(a->data[i]) {
-						pad=1;
-						pb=0xFF;
-						break;
-				}
-			}
-		}
-		ret+=pad;
-		}
-	if (pp == NULL) return(ret);
-	p= *pp;
-
-	if (pad) *(p++)=pb;
-	if (a->length == 0) *(p++)=0;
-	else if (!neg) memcpy(p,a->data,(unsigned int)a->length);
-	else {
-		/* Begin at the end of the encoding */
-		n=a->data + a->length - 1;
-		p += a->length - 1;
-		i = a->length;
-		/* Copy zeros to destination as long as source is zero */
-		while(!*n) {
-			*(p--) = 0;
-			n--;
-			i--;
-		}
-		/* Complement and increment next octet */
-		*(p--) = ((*(n--)) ^ 0xff) + 1;
-		i--;
-		/* Complement any octets left */
-		for(;i > 0; i--) *(p--) = *(n--) ^ 0xff;
-	}
-
-	*pp+=ret;
-	return(ret);
-	}
+{
+    int pad = 0, ret, i, neg;
+    unsigned char *p, *n, pb = 0;
+
+    if (a == NULL)
+        return (0);
+    neg = a->type & V_ASN1_NEG;
+    if (a->length == 0)
+        ret = 1;
+    else {
+        ret = a->length;
+        i = a->data[0];
+        if (!neg && (i > 127)) {
+            pad = 1;
+            pb = 0;
+        } else if (neg) {
+            if (i > 128) {
+                pad = 1;
+                pb = 0xFF;
+            } else if (i == 128) {
+                /*
+                 * Special case: if any other bytes non zero we pad:
+                 * otherwise we don't.
+                 */
+                for (i = 1; i < a->length; i++)
+                    if (a->data[i]) {
+                        pad = 1;
+                        pb = 0xFF;
+                        break;
+                    }
+            }
+        }
+        ret += pad;
+    }
+    if (pp == NULL)
+        return (ret);
+    p = *pp;
+
+    if (pad)
+        *(p++) = pb;
+    if (a->length == 0)
+        *(p++) = 0;
+    else if (!neg)
+        memcpy(p, a->data, (unsigned int)a->length);
+    else {
+        /* Begin at the end of the encoding */
+        n = a->data + a->length - 1;
+        p += a->length - 1;
+        i = a->length;
+        /* Copy zeros to destination as long as source is zero */
+        while (!*n) {
+            *(p--) = 0;
+            n--;
+            i--;
+        }
+        /* Complement and increment next octet */
+        *(p--) = ((*(n--)) ^ 0xff) + 1;
+        i--;
+        /* Complement any octets left */
+        for (; i > 0; i--)
+            *(p--) = *(n--) ^ 0xff;
+    }
+
+    *pp += ret;
+    return (ret);
+}
 
 /* Convert just ASN1 INTEGER content octets to ASN1_INTEGER structure */
 
 ASN1_INTEGER *c2i_ASN1_INTEGER(ASN1_INTEGER **a, const unsigned char **pp,
-	     long len)
-	{
-	ASN1_INTEGER *ret=NULL;
-	const unsigned char *p, *pend;
-	unsigned char *to,*s;
-	int i;
-
-	if ((a == NULL) || ((*a) == NULL))
-		{
-		if ((ret=M_ASN1_INTEGER_new()) == NULL) return(NULL);
-		ret->type=V_ASN1_INTEGER;
-		}
-	else
-		ret=(*a);
-
-	p= *pp;
-	pend = p + len;
-
-	/* We must OPENSSL_malloc stuff, even for 0 bytes otherwise it
-	 * signifies a missing NULL parameter. */
-	s=(unsigned char *)OPENSSL_malloc((int)len+1);
-	if (s == NULL)
-		{
-		i=ERR_R_MALLOC_FAILURE;
-		goto err;
-		}
-	to=s;
-	if(!len) {
-		/* Strictly speaking this is an illegal INTEGER but we
-		 * tolerate it.
-		 */
-		ret->type=V_ASN1_INTEGER;
-	} else if (*p & 0x80) /* a negative number */
-		{
-		ret->type=V_ASN1_NEG_INTEGER;
-		if ((*p == 0xff) && (len != 1)) {
-			p++;
-			len--;
-		}
-		i = len;
-		p += i - 1;
-		to += i - 1;
-		while((!*p) && i) {
-			*(to--) = 0;
-			i--;
-			p--;
-		}
-		/* Special case: if all zeros then the number will be of
-		 * the form FF followed by n zero bytes: this corresponds to
-		 * 1 followed by n zero bytes. We've already written n zeros
-		 * so we just append an extra one and set the first byte to
-		 * a 1. This is treated separately because it is the only case
-		 * where the number of bytes is larger than len.
-		 */
-		if(!i) {
-			*s = 1;
-			s[len] = 0;
-			len++;
-		} else {
-			*(to--) = (*(p--) ^ 0xff) + 1;
-			i--;
-			for(;i > 0; i--) *(to--) = *(p--) ^ 0xff;
-		}
-	} else {
-		ret->type=V_ASN1_INTEGER;
-		if ((*p == 0) && (len != 1))
-			{
-			p++;
-			len--;
-			}
-		memcpy(s,p,(int)len);
-	}
-
-	if (ret->data != NULL) OPENSSL_free(ret->data);
-	ret->data=s;
-	ret->length=(int)len;
-	if (a != NULL) (*a)=ret;
-	*pp=pend;
-	return(ret);
-err:
-	ASN1err(ASN1_F_C2I_ASN1_INTEGER,i);
-	if ((ret != NULL) && ((a == NULL) || (*a != ret)))
-		M_ASN1_INTEGER_free(ret);
-	return(NULL);
-	}
-
-
-/* This is a version of d2i_ASN1_INTEGER that ignores the sign bit of
- * ASN1 integers: some broken software can encode a positive INTEGER
- * with its MSB set as negative (it doesn't add a padding zero).
+                               long len)
+{
+    ASN1_INTEGER *ret = NULL;
+    const unsigned char *p, *pend;
+    unsigned char *to, *s;
+    int i;
+
+    if ((a == NULL) || ((*a) == NULL)) {
+        if ((ret = M_ASN1_INTEGER_new()) == NULL)
+            return (NULL);
+        ret->type = V_ASN1_INTEGER;
+    } else
+        ret = (*a);
+
+    p = *pp;
+    pend = p + len;
+
+    /*
+     * We must OPENSSL_malloc stuff, even for 0 bytes otherwise it signifies
+     * a missing NULL parameter.
+     */
+    s = (unsigned char *)OPENSSL_malloc((int)len + 1);
+    if (s == NULL) {
+        i = ERR_R_MALLOC_FAILURE;
+        goto err;
+    }
+    to = s;
+    if (!len) {
+        /*
+         * Strictly speaking this is an illegal INTEGER but we tolerate it.
+         */
+        ret->type = V_ASN1_INTEGER;
+    } else if (*p & 0x80) {     /* a negative number */
+        ret->type = V_ASN1_NEG_INTEGER;
+        if ((*p == 0xff) && (len != 1)) {
+            p++;
+            len--;
+        }
+        i = len;
+        p += i - 1;
+        to += i - 1;
+        while ((!*p) && i) {
+            *(to--) = 0;
+            i--;
+            p--;
+        }
+        /*
+         * Special case: if all zeros then the number will be of the form FF
+         * followed by n zero bytes: this corresponds to 1 followed by n zero
+         * bytes. We've already written n zeros so we just append an extra
+         * one and set the first byte to a 1. This is treated separately
+         * because it is the only case where the number of bytes is larger
+         * than len.
+         */
+        if (!i) {
+            *s = 1;
+            s[len] = 0;
+            len++;
+        } else {
+            *(to--) = (*(p--) ^ 0xff) + 1;
+            i--;
+            for (; i > 0; i--)
+                *(to--) = *(p--) ^ 0xff;
+        }
+    } else {
+        ret->type = V_ASN1_INTEGER;
+        if ((*p == 0) && (len != 1)) {
+            p++;
+            len--;
+        }
+        memcpy(s, p, (int)len);
+    }
+
+    if (ret->data != NULL)
+        OPENSSL_free(ret->data);
+    ret->data = s;
+    ret->length = (int)len;
+    if (a != NULL)
+        (*a) = ret;
+    *pp = pend;
+    return (ret);
+ err:
+    ASN1err(ASN1_F_C2I_ASN1_INTEGER, i);
+    if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+        M_ASN1_INTEGER_free(ret);
+    return (NULL);
+}
+
+/*
+ * This is a version of d2i_ASN1_INTEGER that ignores the sign bit of ASN1
+ * integers: some broken software can encode a positive INTEGER with its MSB
+ * set as negative (it doesn't add a padding zero).
  */
 
 ASN1_INTEGER *d2i_ASN1_UINTEGER(ASN1_INTEGER **a, const unsigned char **pp,
-	     long length)
-	{
-	ASN1_INTEGER *ret=NULL;
-	const unsigned char *p;
-	unsigned char *s;
-	long len;
-	int inf,tag,xclass;
-	int i;
-
-	if ((a == NULL) || ((*a) == NULL))
-		{
-		if ((ret=M_ASN1_INTEGER_new()) == NULL) return(NULL);
-		ret->type=V_ASN1_INTEGER;
-		}
-	else
-		ret=(*a);
-
-	p= *pp;
-	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
-	if (inf & 0x80)
-		{
-		i=ASN1_R_BAD_OBJECT_HEADER;
-		goto err;
-		}
-
-	if (tag != V_ASN1_INTEGER)
-		{
-		i=ASN1_R_EXPECTING_AN_INTEGER;
-		goto err;
-		}
-
-	/* We must OPENSSL_malloc stuff, even for 0 bytes otherwise it
-	 * signifies a missing NULL parameter. */
-	s=(unsigned char *)OPENSSL_malloc((int)len+1);
-	if (s == NULL)
-		{
-		i=ERR_R_MALLOC_FAILURE;
-		goto err;
-		}
-	ret->type=V_ASN1_INTEGER;
-	if(len) {
-		if ((*p == 0) && (len != 1))
-			{
-			p++;
-			len--;
-			}
-		memcpy(s,p,(int)len);
-		p+=len;
-	}
-
-	if (ret->data != NULL) OPENSSL_free(ret->data);
-	ret->data=s;
-	ret->length=(int)len;
-	if (a != NULL) (*a)=ret;
-	*pp=p;
-	return(ret);
-err:
-	ASN1err(ASN1_F_D2I_ASN1_UINTEGER,i);
-	if ((ret != NULL) && ((a == NULL) || (*a != ret)))
-		M_ASN1_INTEGER_free(ret);
-	return(NULL);
-	}
+                                long length)
+{
+    ASN1_INTEGER *ret = NULL;
+    const unsigned char *p;
+    unsigned char *s;
+    long len;
+    int inf, tag, xclass;
+    int i;
+
+    if ((a == NULL) || ((*a) == NULL)) {
+        if ((ret = M_ASN1_INTEGER_new()) == NULL)
+            return (NULL);
+        ret->type = V_ASN1_INTEGER;
+    } else
+        ret = (*a);
+
+    p = *pp;
+    inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
+    if (inf & 0x80) {
+        i = ASN1_R_BAD_OBJECT_HEADER;
+        goto err;
+    }
+
+    if (tag != V_ASN1_INTEGER) {
+        i = ASN1_R_EXPECTING_AN_INTEGER;
+        goto err;
+    }
+
+    /*
+     * We must OPENSSL_malloc stuff, even for 0 bytes otherwise it signifies
+     * a missing NULL parameter.
+     */
+    s = (unsigned char *)OPENSSL_malloc((int)len + 1);
+    if (s == NULL) {
+        i = ERR_R_MALLOC_FAILURE;
+        goto err;
+    }
+    ret->type = V_ASN1_INTEGER;
+    if (len) {
+        if ((*p == 0) && (len != 1)) {
+            p++;
+            len--;
+        }
+        memcpy(s, p, (int)len);
+        p += len;
+    }
+
+    if (ret->data != NULL)
+        OPENSSL_free(ret->data);
+    ret->data = s;
+    ret->length = (int)len;
+    if (a != NULL)
+        (*a) = ret;
+    *pp = p;
+    return (ret);
+ err:
+    ASN1err(ASN1_F_D2I_ASN1_UINTEGER, i);
+    if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+        M_ASN1_INTEGER_free(ret);
+    return (NULL);
+}
 
 int ASN1_INTEGER_set(ASN1_INTEGER *a, long v)
-	{
-	int j,k;
-	unsigned int i;
-	unsigned char buf[sizeof(long)+1];
-	long d;
-
-	a->type=V_ASN1_INTEGER;
-	if (a->length < (int)(sizeof(long)+1))
-		{
-		if (a->data != NULL)
-			OPENSSL_free(a->data);
-		if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL)
-			memset((char *)a->data,0,sizeof(long)+1);
-		}
-	if (a->data == NULL)
-		{
-		ASN1err(ASN1_F_ASN1_INTEGER_SET,ERR_R_MALLOC_FAILURE);
-		return(0);
-		}
-	d=v;
-	if (d < 0)
-		{
-		d= -d;
-		a->type=V_ASN1_NEG_INTEGER;
-		}
-
-	for (i=0; i<sizeof(long); i++)
-		{
-		if (d == 0) break;
-		buf[i]=(int)d&0xff;
-		d>>=8;
-		}
-	j=0;
-	for (k=i-1; k >=0; k--)
-		a->data[j++]=buf[k];
-	a->length=j;
-	return(1);
-	}
+{
+    int j, k;
+    unsigned int i;
+    unsigned char buf[sizeof(long) + 1];
+    long d;
+
+    a->type = V_ASN1_INTEGER;
+    if (a->length < (int)(sizeof(long) + 1)) {
+        if (a->data != NULL)
+            OPENSSL_free(a->data);
+        if ((a->data =
+             (unsigned char *)OPENSSL_malloc(sizeof(long) + 1)) != NULL)
+            memset((char *)a->data, 0, sizeof(long) + 1);
+    }
+    if (a->data == NULL) {
+        ASN1err(ASN1_F_ASN1_INTEGER_SET, ERR_R_MALLOC_FAILURE);
+        return (0);
+    }
+    d = v;
+    if (d < 0) {
+        d = -d;
+        a->type = V_ASN1_NEG_INTEGER;
+    }
+
+    for (i = 0; i < sizeof(long); i++) {
+        if (d == 0)
+            break;
+        buf[i] = (int)d & 0xff;
+        d >>= 8;
+    }
+    j = 0;
+    for (k = i - 1; k >= 0; k--)
+        a->data[j++] = buf[k];
+    a->length = j;
+    return (1);
+}
 
 long ASN1_INTEGER_get(const ASN1_INTEGER *a)
-	{
-	int neg=0,i;
-	long r=0;
-
-	if (a == NULL) return(0L);
-	i=a->type;
-	if (i == V_ASN1_NEG_INTEGER)
-		neg=1;
-	else if (i != V_ASN1_INTEGER)
-		return -1;
-	
-	if (a->length > (int)sizeof(long))
-		{
-		/* hmm... a bit ugly, return all ones */
-		return -1;
-		}
-	if (a->data == NULL)
-		return 0;
-
-	for (i=0; i<a->length; i++)
-		{
-		r<<=8;
-		r|=(unsigned char)a->data[i];
-		}
-	if (neg) r= -r;
-	return(r);
-	}
+{
+    int neg = 0, i;
+    long r = 0;
+
+    if (a == NULL)
+        return (0L);
+    i = a->type;
+    if (i == V_ASN1_NEG_INTEGER)
+        neg = 1;
+    else if (i != V_ASN1_INTEGER)
+        return -1;
+
+    if (a->length > (int)sizeof(long)) {
+        /* hmm... a bit ugly, return all ones */
+        return -1;
+    }
+    if (a->data == NULL)
+        return 0;
+
+    for (i = 0; i < a->length; i++) {
+        r <<= 8;
+        r |= (unsigned char)a->data[i];
+    }
+    if (neg)
+        r = -r;
+    return (r);
+}
 
 ASN1_INTEGER *BN_to_ASN1_INTEGER(const BIGNUM *bn, ASN1_INTEGER *ai)
-	{
-	ASN1_INTEGER *ret;
-	int len,j;
-
-	if (ai == NULL)
-		ret=M_ASN1_INTEGER_new();
-	else
-		ret=ai;
-	if (ret == NULL)
-		{
-		ASN1err(ASN1_F_BN_TO_ASN1_INTEGER,ERR_R_NESTED_ASN1_ERROR);
-		goto err;
-		}
-	if (BN_is_negative(bn))
-		ret->type = V_ASN1_NEG_INTEGER;
-	else ret->type=V_ASN1_INTEGER;
-	j=BN_num_bits(bn);
-	len=((j == 0)?0:((j/8)+1));
-	if (ret->length < len+4)
-		{
-		unsigned char *new_data=OPENSSL_realloc(ret->data, len+4);
-		if (!new_data)
-			{
-			ASN1err(ASN1_F_BN_TO_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
-			goto err;
-			}
-		ret->data=new_data;
-		}
-	ret->length=BN_bn2bin(bn,ret->data);
-	/* Correct zero case */
-	if(!ret->length)
-		{
-		ret->data[0] = 0;
-		ret->length = 1;
-		}
-	return(ret);
-err:
-	if (ret != ai) M_ASN1_INTEGER_free(ret);
-	return(NULL);
-	}
+{
+    ASN1_INTEGER *ret;
+    int len, j;
+
+    if (ai == NULL)
+        ret = M_ASN1_INTEGER_new();
+    else
+        ret = ai;
+    if (ret == NULL) {
+        ASN1err(ASN1_F_BN_TO_ASN1_INTEGER, ERR_R_NESTED_ASN1_ERROR);
+        goto err;
+    }
+    if (BN_is_negative(bn))
+        ret->type = V_ASN1_NEG_INTEGER;
+    else
+        ret->type = V_ASN1_INTEGER;
+    j = BN_num_bits(bn);
+    len = ((j == 0) ? 0 : ((j / 8) + 1));
+    if (ret->length < len + 4) {
+        unsigned char *new_data = OPENSSL_realloc(ret->data, len + 4);
+        if (!new_data) {
+            ASN1err(ASN1_F_BN_TO_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
+            goto err;
+        }
+        ret->data = new_data;
+    }
+    ret->length = BN_bn2bin(bn, ret->data);
+    /* Correct zero case */
+    if (!ret->length) {
+        ret->data[0] = 0;
+        ret->length = 1;
+    }
+    return (ret);
+ err:
+    if (ret != ai)
+        M_ASN1_INTEGER_free(ret);
+    return (NULL);
+}
 
 BIGNUM *ASN1_INTEGER_to_BN(const ASN1_INTEGER *ai, BIGNUM *bn)
-	{
-	BIGNUM *ret;
+{
+    BIGNUM *ret;
 
-	if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL)
-		ASN1err(ASN1_F_ASN1_INTEGER_TO_BN,ASN1_R_BN_LIB);
-	else if(ai->type == V_ASN1_NEG_INTEGER)
-		BN_set_negative(ret, 1);
-	return(ret);
-	}
+    if ((ret = BN_bin2bn(ai->data, ai->length, bn)) == NULL)
+        ASN1err(ASN1_F_ASN1_INTEGER_TO_BN, ASN1_R_BN_LIB);
+    else if (ai->type == V_ASN1_NEG_INTEGER)
+        BN_set_negative(ret, 1);
+    return (ret);
+}
 
 IMPLEMENT_STACK_OF(ASN1_INTEGER)
+
 IMPLEMENT_ASN1_SET_OF(ASN1_INTEGER)