diff options
Diffstat (limited to 'modules/pam_unix/md5.c')
-rw-r--r-- | modules/pam_unix/md5.c | 59 |
1 files changed, 30 insertions, 29 deletions
diff --git a/modules/pam_unix/md5.c b/modules/pam_unix/md5.c index 9954536f..95b8de4c 100644 --- a/modules/pam_unix/md5.c +++ b/modules/pam_unix/md5.c @@ -21,26 +21,27 @@ #include <string.h> #include "md5.h" +#include "pam_inline.h" + #ifndef HIGHFIRST #define byteReverse(buf, len) /* Nothing */ #else -typedef unsigned char PAM_ATTRIBUTE_ALIGNED(4) uint8_aligned; - -static void byteReverse(uint8_aligned *buf, unsigned longs); +static void byteReverse(uint32 *buf, unsigned longs); #ifndef ASM_MD5 /* * Note: this code is harmless on little-endian machines. */ -static void byteReverse(uint8_aligned *buf, unsigned longs) +static void byteReverse(uint32 *buf, unsigned longs) { uint32 t; do { - t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 | - ((unsigned) buf[1] << 8 | buf[0]); - *(uint32 *) buf = t; - buf += 4; + unsigned char *p = (unsigned char *) buf; + t = (uint32) ((unsigned) p[3] << 8 | p[2]) << 16 | + ((unsigned) p[1] << 8 | p[0]); + *buf = t; + ++buf; } while (--longs); } #endif @@ -52,10 +53,10 @@ static void byteReverse(uint8_aligned *buf, unsigned longs) */ void MD5Name(MD5Init)(struct MD5Context *ctx) { - ctx->buf[0] = 0x67452301U; - ctx->buf[1] = 0xefcdab89U; - ctx->buf[2] = 0x98badcfeU; - ctx->buf[3] = 0x10325476U; + ctx->buf.i[0] = 0x67452301U; + ctx->buf.i[1] = 0xefcdab89U; + ctx->buf.i[2] = 0x98badcfeU; + ctx->buf.i[3] = 0x10325476U; ctx->bits[0] = 0; ctx->bits[1] = 0; @@ -81,7 +82,7 @@ void MD5Name(MD5Update)(struct MD5Context *ctx, unsigned const char *buf, unsign /* Handle any leading odd-sized chunks */ if (t) { - unsigned char *p = (unsigned char *) ctx->in + t; + unsigned char *p = ctx->in.c + t; t = 64 - t; if (len < t) { @@ -89,24 +90,24 @@ void MD5Name(MD5Update)(struct MD5Context *ctx, unsigned const char *buf, unsign return; } memcpy(p, buf, t); - byteReverse(ctx->in, 16); - MD5Name(MD5Transform)(ctx->buf, (uint32 *) ctx->in); + byteReverse(ctx->in.i, 16); + MD5Name(MD5Transform)(ctx->buf.i, ctx->in.i); buf += t; len -= t; } /* Process data in 64-byte chunks */ while (len >= 64) { - memcpy(ctx->in, buf, 64); - byteReverse(ctx->in, 16); - MD5Name(MD5Transform)(ctx->buf, (uint32 *) ctx->in); + memcpy(ctx->in.c, buf, 64); + byteReverse(ctx->in.i, 16); + MD5Name(MD5Transform)(ctx->buf.i, ctx->in.i); buf += 64; len -= 64; } /* Handle any remaining bytes of data. */ - memcpy(ctx->in, buf, len); + memcpy(ctx->in.c, buf, len); } /* @@ -123,7 +124,7 @@ void MD5Name(MD5Final)(unsigned char digest[16], struct MD5Context *ctx) /* Set the first char of padding to 0x80. This is safe since there is always at least one byte free */ - p = ctx->in + count; + p = ctx->in.c + count; *p++ = 0x80; /* Bytes of padding needed to make 64 bytes */ @@ -133,24 +134,24 @@ void MD5Name(MD5Final)(unsigned char digest[16], struct MD5Context *ctx) if (count < 8) { /* Two lots of padding: Pad the first block to 64 bytes */ memset(p, 0, count); - byteReverse(ctx->in, 16); - MD5Name(MD5Transform)(ctx->buf, (uint32 *) ctx->in); + byteReverse(ctx->in.i, 16); + MD5Name(MD5Transform)(ctx->buf.i, ctx->in.i); /* Now fill the next block with 56 bytes */ - memset(ctx->in, 0, 56); + memset(ctx->in.c, 0, 56); } else { /* Pad block to 56 bytes */ memset(p, 0, count - 8); } - byteReverse(ctx->in, 14); + byteReverse(ctx->in.i, 14); /* Append length in bits and transform */ - memcpy((uint32 *)ctx->in + 14, ctx->bits, 2*sizeof(uint32)); + memcpy(ctx->in.i + 14, ctx->bits, 2*sizeof(uint32)); - MD5Name(MD5Transform)(ctx->buf, (uint32 *) ctx->in); - byteReverse((unsigned char *) ctx->buf, 4); - memcpy(digest, ctx->buf, 16); - memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */ + MD5Name(MD5Transform)(ctx->buf.i, ctx->in.i); + byteReverse(ctx->buf.i, 4); + memcpy(digest, ctx->buf.c, 16); + pam_overwrite_object(ctx); /* In case it's sensitive */ } #ifndef ASM_MD5 |