1 files changed, 57 insertions, 0 deletions

diff --git a/src/lib/libcrypto/buffer/buffer.c b/src/lib/libcrypto/buffer/buffer.c
index 9299baba9e..d96487e7db 100644
--- a/src/lib/libcrypto/buffer/buffer.c
+++ b/src/lib/libcrypto/buffer/buffer.c
@@ -125,6 +125,43 @@ int BUF_MEM_grow(BUF_MEM *str, int len)
         return(len);
         }
 
+int BUF_MEM_grow_clean(BUF_MEM *str, int len)
+        {
+        char *ret;
+        unsigned int n;
+
+        if (str->length >= len)
+                {
+                memset(&str->data[len],0,str->length-len);
+                str->length=len;
+                return(len);
+                }
+        if (str->max >= len)
+                {
+                memset(&str->data[str->length],0,len-str->length);
+                str->length=len;
+                return(len);
+                }
+        n=(len+3)/3*4;
+        if (str->data == NULL)
+                ret=OPENSSL_malloc(n);
+        else
+                ret=OPENSSL_realloc_clean(str->data,str->max,n);
+        if (ret == NULL)
+                {
+                BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
+                len=0;
+                }
+        else
+                {
+                str->data=ret;
+                str->max=n;
+                memset(&str->data[str->length],0,len-str->length);
+                str->length=len;
+                }
+        return(len);
+        }
+
 char *BUF_strdup(const char *str)
         {
         char *ret;
@@ -143,3 +180,23 @@ char *BUF_strdup(const char *str)
         return(ret);
         }
 
+size_t BUF_strlcpy(char *dst, const char *src, size_t size)
+        {
+        size_t l = 0;
+        for(; size > 1 && *src; size--)
+                {
+                *dst++ = *src++;
+                l++;
+                }
+        if (size)
+                *dst = '\0';
+        return l + strlen(src);
+        }
+
+size_t BUF_strlcat(char *dst, const char *src, size_t size)
+        {
+        size_t l = 0;
+        for(; size > 0 && *dst; size--, dst++)
+                l++;
+        return l + BUF_strlcpy(dst, src, size);
+        }