md5.c, md5.h: Reformat and delete needless portability.

The algorithm is not going to change, bugs are unlikely to appear in the
upstream RSA version, so reformat the source to be more readable, and
delete portability code now we have function prototypes with parameters,
void pointer, etc.

diff --git a/h/md5.h b/h/md5.h
index 32b8ff8837e81e8d69027fc81bec7f8ce34348dc..568874a486322c5c17d0b6470bdacbee497a5d4b 100644 (file)
--- a/h/md5.h
+++ b/h/md5.h
@@ -6,49 +6,12 @@
  * RSAREF types and constants
  */
 
-/*
- * Use include for nmh/mh
- */
-
 #include <h/nmh.h>
-
-/*
- * We need this for uint32_t
- */
-
 #include <inttypes.h>
 
-/*
- * Use prototypes for nmh/mh
- */
-#define PROTOTYPES 1
-
-/*
- * PROTOTYPES should be set to one if and only if the compiler
- * supports function argument prototyping.  The following makes
- * PROTOTYPES default to 0 if it has not already been defined
- * with C compiler flags.
- */
-#ifndef PROTOTYPES
-#define PROTOTYPES 0
-#endif
-
-/* POINTER defines a generic pointer type */
-typedef unsigned char *POINTER;
-
 /* UINT4 defines a four byte word */
 typedef uint32_t UINT4;
 
-/* PROTO_LIST is defined depending on how PROTOTYPES is defined above.
-If using PROTOTYPES, then PROTO_LIST returns the list, otherwise it
-  returns an empty list.
- */
-#if PROTOTYPES
-#define PROTO_LIST(list) list
-#else
-#define PROTO_LIST(list) ()
-#endif
-
 /* MD5.H - header file for MD5C.C
  */
 
@@ -76,11 +39,11 @@ documentation and/or software.
 
 /* MD5 context. */
 typedef struct {
-  UINT4 state[4];                                   /* state (ABCD) */
-  UINT4 count[2];        /* number of bits, modulo 2^64 (lsb first) */
-  unsigned char buffer[64];                         /* input buffer */
+    UINT4 state[4]; /* state (ABCD) */
+    UINT4 count[2]; /* number of bits, modulo 2^64 (lsb first) */
+    unsigned char buffer[64]; /* input buffer */
 } MD5_CTX;
 
-void MD5Init PROTO_LIST ((MD5_CTX *));
-void MD5Update PROTO_LIST ((MD5_CTX *, unsigned char *, unsigned int));
-void MD5Final PROTO_LIST ((unsigned char [16], MD5_CTX *));
+void MD5Init(MD5_CTX *);
+void MD5Update(MD5_CTX *, unsigned char *, unsigned int);
+void MD5Final(unsigned char [16], MD5_CTX *);

diff --git a/sbr/md5.c b/sbr/md5.c
index 7103ae72e08b156aed4491c407dbdece675f1c2f..34bd14246499a7eebc38ccc664cf1cff0f6b994a 100644 (file)
--- a/sbr/md5.c
+++ b/sbr/md5.c
@@ -31,9 +31,7 @@
 
 #include <h/md5.h>
 
-/*
- * Constants for MD5Transform routine.
- */
+/* Constants for MD5Transform routine. */
 #define S11 7
 #define S12 12
 #define S13 17
@@ -51,253 +49,239 @@
 #define S43 15
 #define S44 21
 
-static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
-static void Encode PROTO_LIST ((unsigned char *, UINT4 *, unsigned int));
-static void Decode PROTO_LIST ((UINT4 *, unsigned char *, unsigned int));
+static void MD5Transform(UINT4 [4], unsigned char [64]);
+static void Encode(unsigned char *, UINT4 *, unsigned int);
+static void Decode(UINT4 *, unsigned char *, unsigned int);
 
 static unsigned char PADDING[64] = {
-  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+    0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
 };
 
-/* F, G, H and I are basic MD5 functions.
- */
+/* F, G, H and I are basic MD5 functions. */
 #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
 #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
 #define H(x, y, z) ((x) ^ (y) ^ (z))
 #define I(x, y, z) ((y) ^ ((x) | (~z)))
 
-/* ROTATE_LEFT rotates x left n bits.
- */
+/* ROTATE_LEFT rotates x left n bits. */
 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
 
 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
-Rotation is separate from addition to prevent recomputation.
- */
-#define FF(a, b, c, d, x, s, ac) { \
- (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
- (a) = ROTATE_LEFT ((a), (s)); \
- (a) += (b); \
-  }
-#define GG(a, b, c, d, x, s, ac) { \
- (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
- (a) = ROTATE_LEFT ((a), (s)); \
- (a) += (b); \
-  }
-#define HH(a, b, c, d, x, s, ac) { \
- (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
- (a) = ROTATE_LEFT ((a), (s)); \
- (a) += (b); \
-  }
-#define II(a, b, c, d, x, s, ac) { \
- (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
- (a) = ROTATE_LEFT ((a), (s)); \
- (a) += (b); \
-  }
-
-/* MD5 initialization. Begins an MD5 operation, writing a new context.
- */
-void MD5Init (context)
-MD5_CTX *context;                                        /* context */
+Rotation is separate from addition to prevent recomputation. */
+#define FF(a, b, c, d, x, s, ac) \
+    { \
+        (a) += F((b), (c), (d)) + (x) + (UINT4)(ac); \
+        (a) = ROTATE_LEFT((a), (s)); \
+        (a) += (b); \
+    }
+#define GG(a, b, c, d, x, s, ac) \
+    { \
+        (a) += G((b), (c), (d)) + (x) + (UINT4)(ac); \
+        (a) = ROTATE_LEFT((a), (s)); \
+        (a) += (b); \
+    }
+#define HH(a, b, c, d, x, s, ac) \
+    { \
+        (a) += H((b), (c), (d)) + (x) + (UINT4)(ac); \
+        (a) = ROTATE_LEFT((a), (s)); \
+        (a) += (b); \
+    }
+#define II(a, b, c, d, x, s, ac) \
+    { \
+        (a) += I((b), (c), (d)) + (x) + (UINT4)(ac); \
+        (a) = ROTATE_LEFT((a), (s)); \
+        (a) += (b); \
+    }
+
+/* MD5 initialization. Begins an MD5 operation, writing a new context. */
+void
+MD5Init(MD5_CTX *context)
 {
-  context->count[0] = context->count[1] = 0;
-  /* Load magic initialization constants.
-*/
-  context->state[0] = 0x67452301;
-  context->state[1] = 0xefcdab89;
-  context->state[2] = 0x98badcfe;
-  context->state[3] = 0x10325476;
+    context->count[0] = context->count[1] = 0;
+    /* Load magic initialization constants. */
+    context->state[0] = 0x67452301;
+    context->state[1] = 0xefcdab89;
+    context->state[2] = 0x98badcfe;
+    context->state[3] = 0x10325476;
 }
 
-/* MD5 block update operation. Continues an MD5 message-digest
-  operation, processing another message block, and updating the
-  context.
- */
-void MD5Update (context, input, inputLen)
-MD5_CTX *context;                                        /* context */
-unsigned char *input;                                /* input block */
-unsigned int inputLen;                     /* length of input block */
+/* MD5 block update operation.  Continues an MD5 message-digest
+ * operation, processing another message block, and updating the
+ * context. */
+void
+MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputLen)
 {
-  unsigned int i, index, partLen;
+    unsigned int i, index, partLen;
 
-  /* Compute number of bytes mod 64 */
-  index = (unsigned int)((context->count[0] >> 3) & 0x3F);
+    /* Compute number of bytes mod 64 */
+    index = (unsigned int)((context->count[0] >> 3) & 0x3F);
 
-  /* Update number of bits */
-  if ((context->count[0] += ((UINT4)inputLen << 3))
-   < ((UINT4)inputLen << 3))
- context->count[1]++;
-  context->count[1] += ((UINT4)inputLen >> 29);
+    /* Update number of bits */
+    if ((context->count[0] += ((UINT4)inputLen << 3)) < ((UINT4)inputLen << 3))
+        context->count[1]++;
+    context->count[1] += ((UINT4)inputLen >> 29);
 
-  partLen = 64 - index;
+    partLen = 64 - index;
 
-  /* Transform as many times as possible. */
-  if (inputLen >= partLen) {
- memcpy ((POINTER)&context->buffer[index], (POINTER)input, partLen);
- MD5Transform (context->state, context->buffer);
+    /* Transform as many times as possible. */
+    if (inputLen >= partLen) {
+        memcpy(&context->buffer[index], input, partLen);
+        MD5Transform(context->state, context->buffer);
 
- for (i = partLen; i + 63 < inputLen; i += 64)
-   MD5Transform (context->state, &input[i]);
+        for (i = partLen; i + 63 < inputLen; i += 64)
+            MD5Transform(context->state, &input[i]);
 
- index = 0;
-  }
-  else
- i = 0;
+        index = 0;
+    } else
+         i = 0;
 
-  /* Buffer remaining input */
-  memcpy ((POINTER)&context->buffer[index], (POINTER)&input[i], inputLen-i);
+    /* Buffer remaining input */
+    memcpy(&context->buffer[index], &input[i], inputLen - i);
 }
 
-/*
- * MD5 finalization. Ends an MD5 message-digest operation, writing the
- * the message digest and zeroizing the context.
- */
-void MD5Final (digest, context)
-unsigned char digest[16];                         /* message digest */
-MD5_CTX *context;                                       /* context */
+/* MD5 finalization. Ends an MD5 message-digest operation, writing the
+ * the message digest and zeroizing the context. */
+void
+MD5Final(unsigned char digest[16], MD5_CTX *context)
 {
-  unsigned char bits[8];
-  unsigned int index, padLen;
+    unsigned char bits[8];
+    unsigned int index;
+    unsigned int padLen;
 
-  /* Save number of bits */
-  Encode (bits, context->count, 8);
+    /* Save number of bits */
+    Encode(bits, context->count, 8);
 
-  /* Pad out to 56 mod 64.
-*/
-  index = (unsigned int)((context->count[0] >> 3) & 0x3f);
-  padLen = (index < 56) ? (56 - index) : (120 - index);
-  MD5Update (context, PADDING, padLen);
+    /* Pad out to 56 mod 64. */
+    index = (unsigned int)((context->count[0] >> 3) & 0x3f);
+    padLen = (index < 56) ? (56 - index) : (120 - index);
+    MD5Update(context, PADDING, padLen);
 
-  /* Append length (before padding) */
-  MD5Update (context, bits, 8);
-  /* Store state in digest */
-  Encode (digest, context->state, 16);
+    /* Append length (before padding) */
+    MD5Update(context, bits, 8);
+    /* Store state in digest */
+    Encode(digest, context->state, 16);
 
-  /* Zeroize sensitive information. */
-  memset ((POINTER)context, 0, sizeof(*context));
+    /* Zeroize sensitive information. */
+    memset(context, 0, sizeof(*context));
 }
 
-/* MD5 basic transformation. Transforms state based on block.
- */
-static void MD5Transform (state, block)
-UINT4 state[4];
-unsigned char block[64];
+/* MD5 basic transformation.  Transforms state based on block. */
+static void
+MD5Transform(UINT4 state[4], unsigned char block[64])
 {
-  UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
-
-  Decode (x, block, 64);
-
-  /* Round 1 */
-  FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
-  FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
-  FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
-  FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
-  FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
-  FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
-  FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
-  FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
-  FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
-  FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
-  FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
-  FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
-  FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
-  FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
-  FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
-  FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
-
- /* Round 2 */
-  GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
-  GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
-  GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
-  GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
-  GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
-  GG (d, a, b, c, x[10], S22,  0x2441453); /* 22 */
-  GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
-  GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
-  GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
-  GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
-  GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
-  GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
-  GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
-  GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
-  GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
-  GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
-
-  /* Round 3 */
-  HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
-  HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
-  HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
-  HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
-  HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
-  HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
-  HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
-  HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
-  HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
-  HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
-  HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
-  HH (b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
-  HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
-  HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
-  HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
-  HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
-
-  /* Round 4 */
-  II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
-  II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
-  II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
-  II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
-  II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
-  II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
-  II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
-  II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
-  II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
-  II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
-  II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
-  II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
-  II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
-  II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
-  II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
-  II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
-
-  state[0] += a;
-  state[1] += b;
-  state[2] += c;
-  state[3] += d;
-
-  /* Zeroize sensitive information. */
-  memset ((POINTER)x, 0, sizeof(x));
+    UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
+
+    Decode(x, block, 64);
+
+    /* Round 1 */
+    FF(a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
+    FF(d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
+    FF(c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
+    FF(b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
+    FF(a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
+    FF(d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
+    FF(c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
+    FF(b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
+    FF(a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
+    FF(d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
+    FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
+    FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
+    FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
+    FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
+    FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
+    FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
+
+    /* Round 2 */
+    GG(a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
+    GG(d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
+    GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
+    GG(b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
+    GG(a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
+    GG(d, a, b, c, x[10], S22,  0x2441453); /* 22 */
+    GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
+    GG(b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
+    GG(a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
+    GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
+    GG(c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
+    GG(b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
+    GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
+    GG(d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
+    GG(c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
+    GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
+
+    /* Round 3 */
+    HH(a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
+    HH(d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
+    HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
+    HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
+    HH(a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
+    HH(d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
+    HH(c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
+    HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
+    HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
+    HH(d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
+    HH(c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
+    HH(b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
+    HH(a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
+    HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
+    HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
+    HH(b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
+
+    /* Round 4 */
+    II(a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
+    II(d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
+    II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
+    II(b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
+    II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
+    II(d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
+    II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
+    II(b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
+    II(a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
+    II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
+    II(c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
+    II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
+    II(a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
+    II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
+    II(c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
+    II(b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
+
+    state[0] += a;
+    state[1] += b;
+    state[2] += c;
+    state[3] += d;
+
+    /* Zeroize sensitive information. */
+    memset(x, 0, sizeof(x));
 }
 
-/* Encodes input (UINT4) into output (unsigned char). Assumes len is
-  a multiple of 4.
- */
-static void Encode (output, input, len)
-unsigned char *output;
-UINT4 *input;
-unsigned int len;
+/* Encodes input (UINT4) into output (unsigned char).  Assumes len is a
+ * multiple of 4. */
+static void
+Encode(unsigned char *output, UINT4 *input, unsigned int len)
 {
-  unsigned int i, j;
-
-  for (i = 0, j = 0; j < len; i++, j += 4) {
- output[j] = (unsigned char)(input[i] & 0xff);
- output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
- output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
- output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
-  }
+    unsigned int i, j;
+
+    for (i = 0, j = 0; j < len; i++, j += 4) {
+        output[j] = (unsigned char)(input[i] & 0xff);
+        output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
+        output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
+        output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
+    }
 }
 
-/* Decodes input (unsigned char) into output (UINT4). Assumes len is
-  a multiple of 4.
- */
-static void Decode (output, input, len)
-UINT4 *output;
-unsigned char *input;
-unsigned int len;
+/* Decodes input (unsigned char) into output (UINT4).  Assumes len is a
+ * multiple of 4. */
+static void
+Decode(UINT4 *output, unsigned char *input, unsigned int len)
 {
-  unsigned int i, j;
+    unsigned int i, j;
 
-  for (i = 0, j = 0; j < len; i++, j += 4)
- output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
-   (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
+    for (i = 0, j = 0; j < len; i++, j += 4)
+        output[i] = ((UINT4)input[j]) |
+            (((UINT4)input[j+1]) << 8) |
+            (((UINT4)input[j+2]) << 16) |
+            (((UINT4)input[j+3]) << 24);
 }