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Remove custom base64 code.

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Use EVP_EncodeBlock/EVP_DecodeBlock

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4207)
This commit is contained in:
Rich Salz 2017-08-21 12:51:36 -04:00
parent 6ac589081b
commit 3d3f21aa97
1 changed files with 6 additions and 106 deletions
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112
crypto/srp/srp_vfy.c
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@ -19,126 +19,26 @@
# define SRP_RANDOM_SALT_LEN 20
# define MAX_LEN 2500
static char b64table[] =
"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz./";
/*
* the following two conversion routines have been inspired by code from
* Stanford
*/
/*
* Convert a base64 string into raw byte array representation.
*/
static int t_fromb64(unsigned char *a, size_t alen, const char *src)
{
char *loc;
int i, j;
int size;
size_t size = strlen(src);
if (alen == 0 || alen > INT_MAX)
/* Four bytes in src become three bytes output. */
if (size > INT_MAX || (size / 4) * 3 > alen)
return -1;
while (*src && (*src == ' ' || *src == '\t' || *src == '\n'))
++src;
size = strlen(src);
if (size < 0 || size >= (int)alen)
return -1;
i = 0;
while (i < size) {
loc = strchr(b64table, src[i]);
if (loc == (char *)0)
break;
else
a[i] = loc - b64table;
++i;
}
/* if nothing valid to process we have a zero length response */
if (i == 0)
return 0;
size = i;
i = size - 1;
j = size;
while (1) {
a[j] = a[i];
if (--i < 0)
break;
a[j] |= (a[i] & 3) << 6;
--j;
a[j] = (unsigned char)((a[i] & 0x3c) >> 2);
if (--i < 0)
break;
a[j] |= (a[i] & 0xf) << 4;
--j;
a[j] = (unsigned char)((a[i] & 0x30) >> 4);
if (--i < 0)
break;
a[j] |= (a[i] << 2);
a[--j] = 0;
if (--i < 0)
break;
}
while (j <= size && a[j] == 0)
++j;
i = 0;
while (j <= size)
a[i++] = a[j++];
return i;
return EVP_DecodeBlock(a, (unsigned char *)src, (int)size);
}
/*
* Convert a raw byte string into a null-terminated base64 ASCII string.
*/
static char *t_tob64(char *dst, const unsigned char *src, int size)
static void t_tob64(char *dst, const unsigned char *src, int size)
{
int c, pos = size % 3;
unsigned char b0 = 0, b1 = 0, b2 = 0, notleading = 0;
char *olddst = dst;
switch (pos) {
case 1:
b2 = src[0];
break;
case 2:
b1 = src[0];
b2 = src[1];
break;
}
while (1) {
c = (b0 & 0xfc) >> 2;
if (notleading || c != 0) {
*dst++ = b64table[c];
notleading = 1;
}
c = ((b0 & 3) << 4) | ((b1 & 0xf0) >> 4);
if (notleading || c != 0) {
*dst++ = b64table[c];
notleading = 1;
}
c = ((b1 & 0xf) << 2) | ((b2 & 0xc0) >> 6);
if (notleading || c != 0) {
*dst++ = b64table[c];
notleading = 1;
}
c = b2 & 0x3f;
if (notleading || c != 0) {
*dst++ = b64table[c];
notleading = 1;
}
if (pos >= size)
break;
else {
b0 = src[pos++];
b1 = src[pos++];
b2 = src[pos++];
}
}
*dst++ = '\0';
return olddst;
EVP_EncodeBlock((unsigned char *)dst, src, size);
}
void SRP_user_pwd_free(SRP_user_pwd *user_pwd)