Format with .clang-format, included herein for reference
[akaros.git] / kern / lib / random / sha2.c
index 2a8a726..d22603f 100644 (file)
 #include <libc.h>
 #include "sha2.h"
 
-
 /*** SHA-256/512 Various Length Definitions ***********************/
-enum{
-       SHA256ShortBlockLength  = (SHA256BlockLength - 8),
-       SHA512ShortBlockLength  = (SHA512_block_length - 16)
+enum {
+       SHA256ShortBlockLength = (SHA256BlockLength - 8),
+       SHA512ShortBlockLength = (SHA512_block_length - 16)
 };
 
 /*
@@ -52,12 +51,13 @@ enum{
  * unsigned 128-bit integer (represented using a two-element array of
  * 64-bit words):
  */
-#define ADDINC128(w,n) { \
-       (w)[0] += (uint64_t)(n); \
-       if ((w)[0] < (n)) { \
-               (w)[1]++; \
-       } \
-}
+#define ADDINC128(w, n)                                                        \
+       {                                                                          \
+               (w)[0] += (uint64_t)(n);                                               \
+               if ((w)[0] < (n)) {                                                    \
+                       (w)[1]++;                                                          \
+               }                                                                      \
+       }
 
 /*** THE SIX LOGICAL FUNCTIONS ****************************************/
 /*
@@ -69,154 +69,108 @@ enum{
  *   same "backwards" definition.
  */
 /* Shift-right (used in SHA-256, SHA-384, and SHA-512): */
-#define R(b,x)                 ((x) >> (b))
+#define R(b, x) ((x) >> (b))
 /* 32-bit Rotate-right (used in SHA-256): */
-#define S32(b,x)       (((x) >> (b)) | ((x) << (32 - (b))))
+#define S32(b, x) (((x) >> (b)) | ((x) << (32 - (b))))
 /* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
-#define S64(b,x)       (((x) >> (b)) | ((x) << (64 - (b))))
+#define S64(b, x) (((x) >> (b)) | ((x) << (64 - (b))))
 
 /* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */
-#define Ch(x,y,z)      (((x) & (y)) ^ ((~(x)) & (z)))
-#define Maj(x,y,z)     (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
+#define Ch(x, y, z) (((x) & (y)) ^ ((~(x)) & (z)))
+#define Maj(x, y, z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
 
 /* Four of six logical functions used in SHA-256: */
-#define Sigma0_256(x)  (S32(2,  (x)) ^ S32(13, (x)) ^ S32(22, (x)))
-#define Sigma1_256(x)  (S32(6,  (x)) ^ S32(11, (x)) ^ S32(25, (x)))
-#define sigma0_256(x)  (S32(7,  (x)) ^ S32(18, (x)) ^ R(3 ,   (x)))
-#define sigma1_256(x)  (S32(17, (x)) ^ S32(19, (x)) ^ R(10,   (x)))
+#define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
+#define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
+#define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3, (x)))
+#define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
 
 /* Four of six logical functions used in SHA-384 and SHA-512: */
-#define Sigma0_512(x)  (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
-#define Sigma1_512(x)  (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
-#define sigma0_512(x)  (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7,   (x)))
-#define sigma1_512(x)  (S64(19, (x)) ^ S64(61, (x)) ^ R( 6,   (x)))
+#define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
+#define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
+#define sigma0_512(x) (S64(1, (x)) ^ S64(8, (x)) ^ R(7, (x)))
+#define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R(6, (x)))
 
 /*** INTERNAL FUNCTION PROTOTYPES *************************************/
 /* NOTE: These should not be accessed directly from outside this
  * library -- they are intended for private internal visibility/use
  * only.
  */
-static void SHA512_Last(SHA512Ctx*);
-static void SHA256_Transform(SHA256Ctx*, const uint32_t*);
-static void SHA512_Transform(SHA512Ctx*, const uint64_t*);
+static void SHA512_Last(SHA512Ctx *);
+static void SHA256_Transform(SHA256Ctx *, const uint32_t *);
+static void SHA512_Transform(SHA512Ctx *, const uint64_t *);
 
 /*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
 /* Hash constant words K for SHA-256: */
 const uint32_t K256[64] = {
-       0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
-       0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
-       0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
-       0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
-       0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
-       0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
-       0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
-       0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
-       0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
-       0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
-       0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
-       0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
-       0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
-       0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
-       0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
-       0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
-};
+       0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL,
+       0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL,
+       0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL,
+       0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
+       0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL,
+       0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL,
+       0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL,
+       0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
+       0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL,
+       0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL,
+       0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL,
+       0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
+       0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL};
 
 /* Initial hash value H for SHA-224: */
 const uint32_t sha224_initial_hash_value[8] = {
-       0xc1059ed8UL,
-       0x367cd507UL,
-       0x3070dd17UL,
-       0xf70e5939UL,
-       0xffc00b31UL,
-       0x68581511UL,
-       0x64f98fa7UL,
-       0xbefa4fa4UL
-};
+       0xc1059ed8UL, 0x367cd507UL, 0x3070dd17UL, 0xf70e5939UL,
+       0xffc00b31UL, 0x68581511UL, 0x64f98fa7UL, 0xbefa4fa4UL};
 
 /* Initial hash value H for SHA-256: */
 static const uint32_t sha256_initial_hash_value[8] = {
-       0x6a09e667UL,
-       0xbb67ae85UL,
-       0x3c6ef372UL,
-       0xa54ff53aUL,
-       0x510e527fUL,
-       0x9b05688cUL,
-       0x1f83d9abUL,
-       0x5be0cd19UL
-};
+       0x6a09e667UL, 0xbb67ae85UL, 0x3c6ef372UL, 0xa54ff53aUL,
+       0x510e527fUL, 0x9b05688cUL, 0x1f83d9abUL, 0x5be0cd19UL};
 
 /* Hash constant words K for SHA-384 and SHA-512: */
 static const uint64_t K512[80] = {
-       0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
-       0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
-       0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
-       0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
-       0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
-       0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
-       0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
-       0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
-       0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
-       0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
-       0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
-       0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
-       0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
-       0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
-       0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
-       0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
-       0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
-       0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
-       0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
-       0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
-       0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
-       0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
-       0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
-       0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
-       0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
-       0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
-       0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
-       0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
-       0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
-       0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
-       0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
-       0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
-       0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
-       0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
-       0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
-       0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
-       0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
-       0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
-       0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
-       0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
-};
+       0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
+       0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
+       0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
+       0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
+       0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
+       0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
+       0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
+       0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
+       0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
+       0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
+       0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
+       0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
+       0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
+       0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
+       0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
+       0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
+       0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
+       0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
+       0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
+       0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
+       0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
+       0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
+       0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
+       0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
+       0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
+       0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
+       0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL};
 
 /* Initial hash value H for SHA-384 */
 static const uint64_t sha384_initial_hash_value[8] = {
-       0xcbbb9d5dc1059ed8ULL,
-       0x629a292a367cd507ULL,
-       0x9159015a3070dd17ULL,
-       0x152fecd8f70e5939ULL,
-       0x67332667ffc00b31ULL,
-       0x8eb44a8768581511ULL,
-       0xdb0c2e0d64f98fa7ULL,
-       0x47b5481dbefa4fa4ULL
-};
+       0xcbbb9d5dc1059ed8ULL, 0x629a292a367cd507ULL, 0x9159015a3070dd17ULL,
+       0x152fecd8f70e5939ULL, 0x67332667ffc00b31ULL, 0x8eb44a8768581511ULL,
+       0xdb0c2e0d64f98fa7ULL, 0x47b5481dbefa4fa4ULL};
 
 /* Initial hash value H for SHA-512 */
 static const uint64_t sha512_initial_hash_value[8] = {
-       0x6a09e667f3bcc908ULL,
-       0xbb67ae8584caa73bULL,
-       0x3c6ef372fe94f82bULL,
-       0xa54ff53a5f1d36f1ULL,
-       0x510e527fade682d1ULL,
-       0x9b05688c2b3e6c1fULL,
-       0x1f83d9abfb41bd6bULL,
-       0x5be0cd19137e2179ULL
-};
-
+       0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL,
+       0xa54ff53a5f1d36f1ULL, 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
+       0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL};
 
 /*** SHA-256: *********************************************************/
-void
-SHA256_Init(SHA256Ctx *context)
+void SHA256_Init(SHA256Ctx *context)
 {
        if (context == nil)
                return;
@@ -224,25 +178,13 @@ SHA256_Init(SHA256Ctx *context)
        memset(context->buffer, 0, SHA256BlockLength);
        context->bitcount = 0;
 }
-static void
-SHA256_Transform(SHA256Ctx *context, const uint32_t *data)
+static void SHA256_Transform(SHA256Ctx *context, const uint32_t *data)
 {
-       uint32_t                a,
-                               b,
-                               c,
-                               d,
-                               e,
-                               f,
-                               g,
-                               h,
-                               s0,
-                               s1;
-       uint32_t                T1,
-                               T2,
-                          *W256;
-       int                     j;
-
-       W256 = (uint32_t *) context->buffer;
+       uint32_t a, b, c, d, e, f, g, h, s0, s1;
+       uint32_t T1, T2, *W256;
+       int j;
+
+       W256 = (uint32_t *)context->buffer;
 
        /* Initialize registers with the prev. intermediate value */
        a = context->state[0];
@@ -255,10 +197,9 @@ SHA256_Transform(SHA256Ctx *context, const uint32_t *data)
        h = context->state[7];
 
        j = 0;
-       do
-       {
-               W256[j] = (uint32_t) data[3] | ((uint32_t) data[2] << 8) |
-                       ((uint32_t) data[1] << 16) | ((uint32_t) data[0] << 24);
+       do {
+               W256[j] = (uint32_t)data[3] | ((uint32_t)data[2] << 8) |
+                                 ((uint32_t)data[1] << 16) | ((uint32_t)data[0] << 24);
                data += 4;
                /* Apply the SHA-256 compression function to update a..h */
                T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
@@ -275,8 +216,7 @@ SHA256_Transform(SHA256Ctx *context, const uint32_t *data)
                j++;
        } while (j < 16);
 
-       do
-       {
+       do {
                /* Part of the message block expansion: */
                s0 = W256[(j + 1) & 0x0f];
                s0 = sigma0_256(s0);
@@ -285,7 +225,7 @@ SHA256_Transform(SHA256Ctx *context, const uint32_t *data)
 
                /* Apply the SHA-256 compression function to update a..h */
                T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +
-                       (W256[j & 0x0f] += s1 + W256[(j + 9) & 0x0f] + s0);
+                        (W256[j & 0x0f] += s1 + W256[(j + 9) & 0x0f] + s0);
                T2 = Sigma0_256(a) + Maj(a, b, c);
                h = g;
                g = f;
@@ -313,33 +253,27 @@ SHA256_Transform(SHA256Ctx *context, const uint32_t *data)
        a = b = c = d = e = f = g = h = T1 = T2 = 0;
 }
 
-void
-SHA256_Update(SHA256Ctx *context, const uint8_t *data, size_t len)
+void SHA256_Update(SHA256Ctx *context, const uint8_t *data, size_t len)
 {
-       size_t          freespace,
-                               usedspace;
+       size_t freespace, usedspace;
 
        /* Calling with no data is valid (we do nothing) */
        if (len == 0)
                return;
 
        usedspace = (context->bitcount >> 3) % SHA256BlockLength;
-       if (usedspace > 0)
-       {
+       if (usedspace > 0) {
                /* Calculate how much free space is available in the buffer */
                freespace = SHA256BlockLength - usedspace;
 
-               if (len >= freespace)
-               {
+               if (len >= freespace) {
                        /* Fill the buffer completely and process it */
                        memmove(&context->buffer[usedspace], data, freespace);
                        context->bitcount += freespace << 3;
                        len -= freespace;
                        data += freespace;
-                       SHA256_Transform(context, (uint32_t*)context->buffer);
-               }
-               else
-               {
+                       SHA256_Transform(context, (uint32_t *)context->buffer);
+               } else {
                        /* The buffer is not yet full */
                        memmove(&context->buffer[usedspace], data, len);
                        context->bitcount += len << 3;
@@ -348,16 +282,14 @@ SHA256_Update(SHA256Ctx *context, const uint8_t *data, size_t len)
                        return;
                }
        }
-       while (len >= SHA256BlockLength)
-       {
+       while (len >= SHA256BlockLength) {
                /* Process as many complete blocks as we can */
-               SHA256_Transform(context, (const uint32_t*)data);
+               SHA256_Transform(context, (const uint32_t *)data);
                context->bitcount += SHA256BlockLength << 3;
                len -= SHA256BlockLength;
                data += SHA256BlockLength;
        }
-       if (len > 0)
-       {
+       if (len > 0) {
                /* There's left-overs, so save 'em */
                memmove(context->buffer, data, len);
                context->bitcount += len << 3;
@@ -366,38 +298,32 @@ SHA256_Update(SHA256Ctx *context, const uint8_t *data, size_t len)
        usedspace = freespace = 0;
 }
 
-static void
-SHA256_Last(SHA256Ctx *context)
+static void SHA256_Last(SHA256Ctx *context)
 {
        unsigned int usedspace;
 
        usedspace = (context->bitcount >> 3) % SHA256BlockLength;
 
-       if (usedspace > 0)
-       {
+       if (usedspace > 0) {
                /* Begin padding with a 1 bit: */
                context->buffer[usedspace++] = 0x80;
 
-               if (usedspace <= SHA256ShortBlockLength)
-               {
+               if (usedspace <= SHA256ShortBlockLength) {
                        /* Set-up for the last transform: */
-                       memset(&context->buffer[usedspace], 0, SHA256ShortBlockLength - usedspace);
-               }
-               else
-               {
-                       if (usedspace < SHA256BlockLength)
-                       {
-                               memset(&context->buffer[usedspace], 0, SHA256BlockLength - usedspace);
+                       memset(&context->buffer[usedspace], 0,
+                                  SHA256ShortBlockLength - usedspace);
+               } else {
+                       if (usedspace < SHA256BlockLength) {
+                               memset(&context->buffer[usedspace], 0,
+                                          SHA256BlockLength - usedspace);
                        }
                        /* Do second-to-last transform: */
-                       SHA256_Transform(context, (uint32_t*)context->buffer);
+                       SHA256_Transform(context, (uint32_t *)context->buffer);
 
                        /* And set-up for the last transform: */
                        memset(context->buffer, 0, SHA256ShortBlockLength);
                }
-       }
-       else
-       {
+       } else {
                /* Set-up for the last transform: */
                memset(context->buffer, 0, SHA256ShortBlockLength);
 
@@ -405,18 +331,16 @@ SHA256_Last(SHA256Ctx *context)
                *context->buffer = 0x80;
        }
        /* Set the bit count: */
-       *(uint64_t *) &context->buffer[SHA256ShortBlockLength] = context->bitcount;
+       *(uint64_t *)&context->buffer[SHA256ShortBlockLength] = context->bitcount;
 
        /* Final transform: */
-       SHA256_Transform(context, (uint32_t*)context->buffer);
+       SHA256_Transform(context, (uint32_t *)context->buffer);
 }
 
-void
-SHA256_Final(uint8_t digest[], SHA256Ctx *context)
+void SHA256_Final(uint8_t digest[], SHA256Ctx *context)
 {
        /* If no digest buffer is passed, we don't bother doing this: */
-       if (digest != nil)
-       {
+       if (digest != nil) {
                SHA256_Last(context);
 
                memmove(digest, context->state, SHA256DigestLength);
@@ -426,10 +350,8 @@ SHA256_Final(uint8_t digest[], SHA256Ctx *context)
        memset(context, 0, sizeof(*context));
 }
 
-
 /*** SHA-512: *********************************************************/
-void
-SHA512_Init(SHA512Ctx *context)
+void SHA512_Init(SHA512Ctx *context)
 {
        if (context == nil)
                return;
@@ -438,23 +360,11 @@ SHA512_Init(SHA512Ctx *context)
        context->bitcount[0] = context->bitcount[1] = 0;
 }
 
-static void
-SHA512_Transform(SHA512Ctx *context, const uint64_t *data)
+static void SHA512_Transform(SHA512Ctx *context, const uint64_t *data)
 {
-       uint64_t                a,
-                               b,
-                               c,
-                               d,
-                               e,
-                               f,
-                               g,
-                               h,
-                               s0,
-                               s1;
-       uint64_t                T1,
-                               T2,
-                          *W512 = (uint64_t *) context->buffer;
-       int                     j;
+       uint64_t a, b, c, d, e, f, g, h, s0, s1;
+       uint64_t T1, T2, *W512 = (uint64_t *)context->buffer;
+       int j;
 
        /* Initialize registers with the prev. intermediate value */
        a = context->state[0];
@@ -467,12 +377,11 @@ SHA512_Transform(SHA512Ctx *context, const uint64_t *data)
        h = context->state[7];
 
        j = 0;
-       do
-       {
-               W512[j] = (uint64_t) data[7] | ((uint64_t) data[6] << 8) |
-                       ((uint64_t) data[5] << 16) | ((uint64_t) data[4] << 24) |
-                       ((uint64_t) data[3] << 32) | ((uint64_t) data[2] << 40) |
-                       ((uint64_t) data[1] << 48) | ((uint64_t) data[0] << 56);
+       do {
+               W512[j] = (uint64_t)data[7] | ((uint64_t)data[6] << 8) |
+                                 ((uint64_t)data[5] << 16) | ((uint64_t)data[4] << 24) |
+                                 ((uint64_t)data[3] << 32) | ((uint64_t)data[2] << 40) |
+                                 ((uint64_t)data[1] << 48) | ((uint64_t)data[0] << 56);
                data += 8;
                /* Apply the SHA-512 compression function to update a..h */
                T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
@@ -489,8 +398,7 @@ SHA512_Transform(SHA512Ctx *context, const uint64_t *data)
                j++;
        } while (j < 16);
 
-       do
-       {
+       do {
                /* Part of the message block expansion: */
                s0 = W512[(j + 1) & 0x0f];
                s0 = sigma0_512(s0);
@@ -499,7 +407,7 @@ SHA512_Transform(SHA512Ctx *context, const uint64_t *data)
 
                /* Apply the SHA-512 compression function to update a..h */
                T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
-                       (W512[j & 0x0f] += s1 + W512[(j + 9) & 0x0f] + s0);
+                        (W512[j & 0x0f] += s1 + W512[(j + 9) & 0x0f] + s0);
                T2 = Sigma0_512(a) + Maj(a, b, c);
                h = g;
                g = f;
@@ -527,33 +435,27 @@ SHA512_Transform(SHA512Ctx *context, const uint64_t *data)
        a = b = c = d = e = f = g = h = T1 = T2 = 0;
 }
 
-void
-SHA512_Update(SHA512Ctx *context, const uint8_t *data, size_t len)
+void SHA512_Update(SHA512Ctx *context, const uint8_t *data, size_t len)
 {
-       size_t          freespace,
-                               usedspace;
+       size_t freespace, usedspace;
 
        /* Calling with no data is valid (we do nothing) */
        if (len == 0)
                return;
 
        usedspace = (context->bitcount[0] >> 3) % SHA512_block_length;
-       if (usedspace > 0)
-       {
+       if (usedspace > 0) {
                /* Calculate how much free space is available in the buffer */
                freespace = SHA512_block_length - usedspace;
 
-               if (len >= freespace)
-               {
+               if (len >= freespace) {
                        /* Fill the buffer completely and process it */
                        memmove(&context->buffer[usedspace], data, freespace);
                        ADDINC128(context->bitcount, freespace << 3);
                        len -= freespace;
                        data += freespace;
-                       SHA512_Transform(context, (uint64_t*)context->buffer);
-               }
-               else
-               {
+                       SHA512_Transform(context, (uint64_t *)context->buffer);
+               } else {
                        /* The buffer is not yet full */
                        memmove(&context->buffer[usedspace], data, len);
                        ADDINC128(context->bitcount, len << 3);
@@ -562,16 +464,14 @@ SHA512_Update(SHA512Ctx *context, const uint8_t *data, size_t len)
                        return;
                }
        }
-       while (len >= SHA512_block_length)
-       {
+       while (len >= SHA512_block_length) {
                /* Process as many complete blocks as we can */
-               SHA512_Transform(context, (const uint64_t*)data);
+               SHA512_Transform(context, (const uint64_t *)data);
                ADDINC128(context->bitcount, SHA512_block_length << 3);
                len -= SHA512_block_length;
                data += SHA512_block_length;
        }
-       if (len > 0)
-       {
+       if (len > 0) {
                /* There's left-overs, so save 'em */
                memmove(context->buffer, data, len);
                ADDINC128(context->bitcount, len << 3);
@@ -580,38 +480,32 @@ SHA512_Update(SHA512Ctx *context, const uint8_t *data, size_t len)
        usedspace = freespace = 0;
 }
 
-static void
-SHA512_Last(SHA512Ctx *context)
+static void SHA512_Last(SHA512Ctx *context)
 {
        unsigned int usedspace;
 
        usedspace = (context->bitcount[0] >> 3) % SHA512_block_length;
 
-       if (usedspace > 0)
-       {
+       if (usedspace > 0) {
                /* Begin padding with a 1 bit: */
                context->buffer[usedspace++] = 0x80;
 
-               if (usedspace <= SHA512ShortBlockLength)
-               {
+               if (usedspace <= SHA512ShortBlockLength) {
                        /* Set-up for the last transform: */
-                       memset(&context->buffer[usedspace], 0, SHA512ShortBlockLength - usedspace);
-               }
-               else
-               {
-                       if (usedspace < SHA512_block_length)
-                       {
-                               memset(&context->buffer[usedspace], 0, SHA512_block_length - usedspace);
+                       memset(&context->buffer[usedspace], 0,
+                                  SHA512ShortBlockLength - usedspace);
+               } else {
+                       if (usedspace < SHA512_block_length) {
+                               memset(&context->buffer[usedspace], 0,
+                                          SHA512_block_length - usedspace);
                        }
                        /* Do second-to-last transform: */
-                       SHA512_Transform(context, (uint64_t*)context->buffer);
+                       SHA512_Transform(context, (uint64_t *)context->buffer);
 
                        /* And set-up for the last transform: */
                        memset(context->buffer, 0, SHA512_block_length - 2);
                }
-       }
-       else
-       {
+       } else {
                /* Prepare for final transform: */
                memset(context->buffer, 0, SHA512ShortBlockLength);
 
@@ -619,19 +513,19 @@ SHA512_Last(SHA512Ctx *context)
                *context->buffer = 0x80;
        }
        /* Store the length of input data (in bits): */
-       *(uint64_t *) &context->buffer[SHA512ShortBlockLength] = context->bitcount[1];
-       *(uint64_t *) &context->buffer[SHA512ShortBlockLength + 8] = context->bitcount[0];
+       *(uint64_t *)&context->buffer[SHA512ShortBlockLength] =
+               context->bitcount[1];
+       *(uint64_t *)&context->buffer[SHA512ShortBlockLength + 8] =
+               context->bitcount[0];
 
        /* Final transform: */
-       SHA512_Transform(context, (uint64_t*)context->buffer);
+       SHA512_Transform(context, (uint64_t *)context->buffer);
 }
 
-void
-SHA512_Final(uint8_t digest[], SHA512Ctx *context)
+void SHA512_Final(uint8_t digest[], SHA512Ctx *context)
 {
        /* If no digest buffer is passed, we don't bother doing this: */
-       if (digest != nil)
-       {
+       if (digest != nil) {
                SHA512_Last(context);
 
                /* Save the hash data for output: */
@@ -642,10 +536,8 @@ SHA512_Final(uint8_t digest[], SHA512Ctx *context)
        memset(context, 0, sizeof(*context));
 }
 
-
 /*** SHA-384: *********************************************************/
-void
-SHA384_Init(SHA384Ctx *context)
+void SHA384_Init(SHA384Ctx *context)
 {
        if (context == nil)
                return;
@@ -654,19 +546,16 @@ SHA384_Init(SHA384Ctx *context)
        context->bitcount[0] = context->bitcount[1] = 0;
 }
 
-void
-SHA384_Update(SHA384Ctx *context, const uint8_t *data, size_t len)
+void SHA384_Update(SHA384Ctx *context, const uint8_t *data, size_t len)
 {
-       SHA512_Update((SHA512Ctx *) context, data, len);
+       SHA512_Update((SHA512Ctx *)context, data, len);
 }
 
-void
-SHA384_Final(uint8_t digest[], SHA384Ctx *context)
+void SHA384_Final(uint8_t digest[], SHA384Ctx *context)
 {
        /* If no digest buffer is passed, we don't bother doing this: */
-       if (digest != nil)
-       {
-               SHA512_Last((SHA512Ctx *) context);
+       if (digest != nil) {
+               SHA512_Last((SHA512Ctx *)context);
 
                /* Save the hash data for output: */
                memmove(digest, context->state, SHA384DigestLength);
@@ -677,8 +566,7 @@ SHA384_Final(uint8_t digest[], SHA384Ctx *context)
 }
 
 /*** SHA-224: *********************************************************/
-void
-SHA224_Init(SHA224Ctx *context)
+void SHA224_Init(SHA224Ctx *context)
 {
        if (context == nil)
                return;
@@ -687,18 +575,15 @@ SHA224_Init(SHA224Ctx *context)
        context->bitcount = 0;
 }
 
-void
-SHA224_Update(SHA224Ctx *context, const uint8_t *data, size_t len)
+void SHA224_Update(SHA224Ctx *context, const uint8_t *data, size_t len)
 {
-       SHA256_Update((SHA256Ctx *) context, data, len);
+       SHA256_Update((SHA256Ctx *)context, data, len);
 }
 
-void
-SHA224_Final(uint8_t digest[], SHA224Ctx *context)
+void SHA224_Final(uint8_t digest[], SHA224Ctx *context)
 {
        /* If no digest buffer is passed, we don't bother doing this: */
-       if (digest != nil)
-       {
+       if (digest != nil) {
                SHA256_Last(context);
 
                memmove(digest, context->state, SHA224DigestLength);