sha512.c File Reference

SHA-512 algorithm. More...

#include <stdint.h>
#include <string.h>
#include <byteswap.h>
#include <assert.h>
#include <ipxe/rotate.h>
#include <ipxe/crypto.h>
#include <ipxe/sha512.h>

Go to the source code of this file.

Data Structures
struct	sha512_variables
	SHA-512 variables. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
void	sha512_family_init (struct sha512_context *context, const struct sha512_digest *init, size_t digestsize)
	Initialise SHA-512 family algorithm. More...
static void	sha512_init (void *ctx)
	Initialise SHA-512 algorithm. More...
static void	sha512_digest (struct sha512_context *context)
	Calculate SHA-512 digest of accumulated data. More...
void	sha512_update (void *ctx, const void *data, size_t len)
	Accumulate data with SHA-512 algorithm. More...
void	sha512_final (void *ctx, void *out)
	Generate SHA-512 digest. More...

Variables
static const uint64_t	k [SHA512_ROUNDS]
	SHA-512 constants. More...
static const struct sha512_digest	sha512_init_digest
	SHA-512 initial digest values. More...
struct digest_algorithm	sha512_algorithm
	SHA-512 algorithm. More...

Detailed Description

SHA-512 algorithm.

Definition in file sha512.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

sha512_family_init()

void sha512_family_init	(	struct sha512_context *	context,
		const struct sha512_digest *	init,
		size_t	digestsize
	)

Initialise SHA-512 family algorithm.

Parameters

context	SHA-512 context
init	Initial digest values
digestsize	Digest size

Definition at line 108 of file sha512.c.

                                              {

        context->len = 0;
        context->digestsize = digestsize;
        memcpy ( &context->ddq.dd.digest, init,
                 sizeof ( context->ddq.dd.digest ) );
}

References sha512_digest_data_qwords::dd, sha512_context::ddq, sha512_digest_data::digest, digestsize, sha512_context::digestsize, sha512_context::len, and memcpy().

Referenced by sha384_init(), sha512_224_init(), sha512_256_init(), and sha512_init().

sha512_init()

static void sha512_init ( void *  ctx )

static

Initialise SHA-512 algorithm.

Parameters

ctx	SHA-512 context

Definition at line 123 of file sha512.c.

                                      {
        struct sha512_context *context = ctx;

        sha512_family_init ( context, &sha512_init_digest,
                             sizeof ( struct sha512_digest ) );
}

References ctx, sha512_family_init(), and sha512_init_digest.

sha512_digest()

static void sha512_digest ( struct sha512_context *  context )

static

Calculate SHA-512 digest of accumulated data.

Parameters

context

SHA-512 context

Definition at line 135 of file sha512.c.

                                                             {
        union {
                union sha512_digest_data_qwords ddq;
                struct sha512_variables v;
        } u;
        uint64_t *a = &u.v.a;
        uint64_t *b = &u.v.b;
        uint64_t *c = &u.v.c;
        uint64_t *d = &u.v.d;
        uint64_t *e = &u.v.e;
        uint64_t *f = &u.v.f;
        uint64_t *g = &u.v.g;
        uint64_t *h = &u.v.h;
        uint64_t *w = u.v.w;
        uint64_t s0;
        uint64_t s1;
        uint64_t maj;
        uint64_t t1;
        uint64_t t2;
        uint64_t ch;
        unsigned int i;

        /* Sanity checks */
        assert ( ( context->len % sizeof ( context->ddq.dd.data ) ) == 0 );
        build_assert ( &u.ddq.dd.digest.h[0] == a );
        build_assert ( &u.ddq.dd.digest.h[1] == b );
        build_assert ( &u.ddq.dd.digest.h[2] == c );
        build_assert ( &u.ddq.dd.digest.h[3] == d );
        build_assert ( &u.ddq.dd.digest.h[4] == e );
        build_assert ( &u.ddq.dd.digest.h[5] == f );
        build_assert ( &u.ddq.dd.digest.h[6] == g );
        build_assert ( &u.ddq.dd.digest.h[7] == h );
        build_assert ( &u.ddq.dd.data.qword[0] == w );

        DBGC ( context, "SHA512 digesting:\n" );
        DBGC_HDA ( context, 0, &context->ddq.dd.digest,
                   sizeof ( context->ddq.dd.digest ) );
        DBGC_HDA ( context, context->len, &context->ddq.dd.data,
                   sizeof ( context->ddq.dd.data ) );

        /* Convert h[0..7] to host-endian, and initialise a, b, c, d,
         * e, f, g, h, and w[0..15]
         */
        for ( i = 0 ; i < ( sizeof ( u.ddq.qword ) /
                            sizeof ( u.ddq.qword[0] ) ) ; i++ ) {
                be64_to_cpus ( &context->ddq.qword[i] );
                u.ddq.qword[i] = context->ddq.qword[i];
        }

        /* Initialise w[16..79] */
        for ( i = 16 ; i < SHA512_ROUNDS ; i++ ) {
                s0 = ( ror64 ( w[i-15], 1 ) ^ ror64 ( w[i-15], 8 ) ^
                       ( w[i-15] >> 7 ) );
                s1 = ( ror64 ( w[i-2], 19 ) ^ ror64 ( w[i-2], 61 ) ^
                       ( w[i-2] >> 6 ) );
                w[i] = ( w[i-16] + s0 + w[i-7] + s1 );
        }

        /* Main loop */
        for ( i = 0 ; i < SHA512_ROUNDS ; i++ ) {
                s0 = ( ror64 ( *a, 28 ) ^ ror64 ( *a, 34 ) ^ ror64 ( *a, 39 ) );
                maj = ( ( *a & *b ) ^ ( *a & *c ) ^ ( *b & *c ) );
                t2 = ( s0 + maj );
                s1 = ( ror64 ( *e, 14 ) ^ ror64 ( *e, 18 ) ^ ror64 ( *e, 41 ) );
                ch = ( ( *e & *f ) ^ ( (~*e) & *g ) );
                t1 = ( *h + s1 + ch + k[i] + w[i] );
                *h = *g;
                *g = *f;
                *f = *e;
                *e = ( *d + t1 );
                *d = *c;
                *c = *b;
                *b = *a;
                *a = ( t1 + t2 );
                DBGC2 ( context, "%2d : %016llx %016llx %016llx %016llx "
                        "%016llx %016llx %016llx %016llx\n",
                        i, *a, *b, *c, *d, *e, *f, *g, *h );
        }

        /* Add chunk to hash and convert back to big-endian */
        for ( i = 0 ; i < 8 ; i++ ) {
                context->ddq.dd.digest.h[i] =
                        cpu_to_be64 ( context->ddq.dd.digest.h[i] +
                                      u.ddq.dd.digest.h[i] );
        }

        DBGC ( context, "SHA512 digested:\n" );
        DBGC_HDA ( context, 0, &context->ddq.dd.digest,
                   sizeof ( context->ddq.dd.digest ) );
}

References sha512_variables::a, assert(), sha512_variables::b, be64_to_cpus, build_assert, c, ch, cpu_to_be64, sha512_variables::d, sha512_digest_data::data, DBGC, DBGC2, DBGC_HDA, sha512_digest_data_qwords::dd, sha512_context::ddq, sha512_digest_data::digest, sha512_variables::e, sha512_variables::f, sha512_variables::g, h, sha512_digest::h, k, sha512_context::len, sha512_digest_data_qwords::qword, SHA512_ROUNDS, u, and sha512_variables::w.

Referenced by sha512_update().

sha512_update()

void sha512_update	(	void *	ctx,
		const void *	data,
		size_t	len
	)

Accumulate data with SHA-512 algorithm.

Parameters

ctx	SHA-512 context
data	Data
len	Length of data

Definition at line 233 of file sha512.c.

                                                               {
        struct sha512_context *context = ctx;
        const uint8_t *byte = data;
        size_t offset;

        /* Accumulate data a byte at a time, performing the digest
         * whenever we fill the data buffer
         */
        while ( len-- ) {
                offset = ( context->len % sizeof ( context->ddq.dd.data ) );
                context->ddq.dd.data.byte[offset] = *(byte++);
                context->len++;
                if ( ( context->len % sizeof ( context->ddq.dd.data ) ) == 0 )
                        sha512_digest ( context );
        }
}

References sha512_block::byte, ctx, data, sha512_digest_data::data, sha512_digest_data_qwords::dd, sha512_context::ddq, len, sha512_context::len, offset, and sha512_digest().

Referenced by sha512_final().

sha512_final()

void sha512_final	(	void *	ctx,
		void *	out
	)

Generate SHA-512 digest.

Parameters

ctx	SHA-512 context
out	Output buffer

Definition at line 256 of file sha512.c.

                                           {
        struct sha512_context *context = ctx;
        uint64_t len_bits_hi;
        uint64_t len_bits_lo;
        uint8_t pad;

        /* Record length before pre-processing */
        len_bits_hi = 0;
        len_bits_lo = cpu_to_be64 ( ( ( uint64_t ) context->len ) * 8 );

        /* Pad with a single "1" bit followed by as many "0" bits as required */
        pad = 0x80;
        do {
                sha512_update ( ctx, &pad, sizeof ( pad ) );
                pad = 0x00;
        } while ( ( context->len % sizeof ( context->ddq.dd.data ) ) !=
                  offsetof ( typeof ( context->ddq.dd.data ), final.len_hi ) );

        /* Append length (in bits) */
        sha512_update ( ctx, &len_bits_hi, sizeof ( len_bits_hi ) );
        sha512_update ( ctx, &len_bits_lo, sizeof ( len_bits_lo ) );
        assert ( ( context->len % sizeof ( context->ddq.dd.data ) ) == 0 );

        /* Copy out final digest */
        memcpy ( out, &context->ddq.dd.digest, context->digestsize );
}

References assert(), cpu_to_be64, ctx, sha512_digest_data::data, sha512_digest_data_qwords::dd, sha512_context::ddq, sha512_digest_data::digest, sha512_context::digestsize, sha512_context::len, memcpy(), offsetof, out, pad, sha512_update(), and typeof().

Variable Documentation

k

const uint64_t k[SHA512_ROUNDS]

static

Initial value:

= {
        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
}

SHA-512 constants.

Definition at line 57 of file sha512.c.

Referenced by sha512_digest().

sha512_init_digest

const struct sha512_digest sha512_init_digest

static

Initial value:

= {
        .h = {
                cpu_to_be64 ( 0x6a09e667f3bcc908ULL ),
                cpu_to_be64 ( 0xbb67ae8584caa73bULL ),
                cpu_to_be64 ( 0x3c6ef372fe94f82bULL ),
                cpu_to_be64 ( 0xa54ff53a5f1d36f1ULL ),
                cpu_to_be64 ( 0x510e527fade682d1ULL ),
                cpu_to_be64 ( 0x9b05688c2b3e6c1fULL ),
                cpu_to_be64 ( 0x1f83d9abfb41bd6bULL ),
                cpu_to_be64 ( 0x5be0cd19137e2179ULL ),
        },
}

SHA-512 initial digest values.

Definition at line 88 of file sha512.c.

Referenced by sha512_init().

sha512_algorithm

struct digest_algorithm sha512_algorithm

Initial value:

= {
        .name           = "sha512",
        .ctxsize        = sizeof ( struct sha512_context ),
        .blocksize      = sizeof ( union sha512_block ),
        .digestsize     = sizeof ( struct sha512_digest ),
        .init           = sha512_init,
        .update         = sha512_update,
        .final          = sha512_final,
}

SHA-512 algorithm.

Definition at line 284 of file sha512.c.

Referenced by peerdist_info_v1(), peerdist_info_v2(), and sha512_test_exec().