diff options
Diffstat (limited to 'crypto/asn1/a_bitstr.c')
| -rw-r--r-- | crypto/asn1/a_bitstr.c | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/crypto/asn1/a_bitstr.c b/crypto/asn1/a_bitstr.c index eb99ebca2f..2c10120651 100644 --- a/crypto/asn1/a_bitstr.c +++ b/crypto/asn1/a_bitstr.c @@ -1,5 +1,5 @@ /* crypto/asn1/a_bitstr.c */ -/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written @@ -156,3 +156,49 @@ err: return(NULL); } +/* These next 2 functions from Goetz Babin-Ebell <babinebell@trustcenter.de> + */ +int ASN1_BIT_STRING_set_bit(a,n,value) +ASN1_BIT_STRING *a; +int n; +int value; + { + int w,v,iv; + unsigned char *c; + + w=n/8; + v=1<<(7-(n&0x07)); + iv= ~v; + + if (a == NULL) return(0); + if ((a->length < (w+1)) || (a->data == NULL)) + { + if (!value) return(1); /* Don't need to set */ + if (a->data == NULL) + c=(unsigned char *)Malloc(w+1); + else + c=(unsigned char *)Realloc(a->data,w+1); + if (c == NULL) return(0); + a->data=c; + a->length=w+1; + c[w]=0; + } + a->data[w]=((a->data[w])&iv)|v; + while ((a->length > 0) && (a->data[a->length-1] == 0)) + a->length--; + return(1); + } + +int ASN1_BIT_STRING_get_bit(a,n) +ASN1_BIT_STRING *a; +int n; + { + int w,v; + + w=n/8; + v=1<<(7-(n&0x07)); + if ((a == NULL) || (a->length < (w+1)) || (a->data == NULL)) + return(0); + return((a->data[w]&v) != 0); + } + |