diff options
Diffstat (limited to 'src/crypto')
| -rw-r--r-- | src/crypto/sha256.c | 8 | ||||
| -rw-r--r-- | src/crypto/sha512.c | 303 |
2 files changed, 307 insertions, 4 deletions
diff --git a/src/crypto/sha256.c b/src/crypto/sha256.c index 695ae70c..0360d8d1 100644 --- a/src/crypto/sha256.c +++ b/src/crypto/sha256.c @@ -51,11 +51,11 @@ struct sha256_variables { uint32_t f; uint32_t g; uint32_t h; - uint32_t w[64]; + uint32_t w[SHA256_ROUNDS]; } __attribute__ (( packed )); /** SHA-256 constants */ -static const uint32_t k[64] = { +static const uint32_t k[SHA256_ROUNDS] = { 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, @@ -167,7 +167,7 @@ static void sha256_digest ( struct sha256_context *context ) { } /* Initialise w[16..63] */ - for ( i = 16 ; i < 64 ; i++ ) { + for ( i = 16 ; i < SHA256_ROUNDS ; i++ ) { s0 = ( ror32 ( w[i-15], 7 ) ^ ror32 ( w[i-15], 18 ) ^ ( w[i-15] >> 3 ) ); s1 = ( ror32 ( w[i-2], 17 ) ^ ror32 ( w[i-2], 19 ) ^ @@ -176,7 +176,7 @@ static void sha256_digest ( struct sha256_context *context ) { } /* Main loop */ - for ( i = 0 ; i < 64 ; i++ ) { + for ( i = 0 ; i < SHA256_ROUNDS ; i++ ) { s0 = ( ror32 ( *a, 2 ) ^ ror32 ( *a, 13 ) ^ ror32 ( *a, 22 ) ); maj = ( ( *a & *b ) ^ ( *a & *c ) ^ ( *b & *c ) ); t2 = ( s0 + maj ); diff --git a/src/crypto/sha512.c b/src/crypto/sha512.c new file mode 100644 index 00000000..814f4456 --- /dev/null +++ b/src/crypto/sha512.c @@ -0,0 +1,303 @@ +/* + * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + * You can also choose to distribute this program under the terms of + * the Unmodified Binary Distribution Licence (as given in the file + * COPYING.UBDL), provided that you have satisfied its requirements. + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +/** @file + * + * SHA-512 algorithm + * + */ + +#include <stdint.h> +#include <string.h> +#include <byteswap.h> +#include <assert.h> +#include <ipxe/rotate.h> +#include <ipxe/crypto.h> +#include <ipxe/asn1.h> +#include <ipxe/sha512.h> + +/** SHA-512 variables */ +struct sha512_variables { + /* This layout matches that of struct sha512_digest_data, + * allowing for efficient endianness-conversion, + */ + uint64_t a; + uint64_t b; + uint64_t c; + uint64_t d; + uint64_t e; + uint64_t f; + uint64_t g; + uint64_t h; + uint64_t w[SHA512_ROUNDS]; +} __attribute__ (( packed )); + +/** SHA-512 constants */ +static const uint64_t k[SHA512_ROUNDS] = { + 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 initial digest values */ +static const struct sha512_digest sha512_init_digest = { + .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 ), + }, +}; + +/** + * Initialise SHA-512 family algorithm + * + * @v context SHA-512 context + * @v init Initial digest values + * @v digestsize Digest size + */ +void sha512_family_init ( struct sha512_context *context, + const struct sha512_digest *init, + size_t digestsize ) { + + context->len = 0; + context->digestsize = digestsize; + memcpy ( &context->ddq.dd.digest, init, + sizeof ( context->ddq.dd.digest ) ); +} + +/** + * Initialise SHA-512 algorithm + * + * @v ctx SHA-512 context + */ +static void sha512_init ( void *ctx ) { + struct sha512_context *context = ctx; + + sha512_family_init ( context, &sha512_init_digest, + sizeof ( struct sha512_digest ) ); +} + +/** + * Calculate SHA-512 digest of accumulated data + * + * @v context SHA-512 context + */ +static void sha512_digest ( struct sha512_context *context ) { + 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 ); + linker_assert ( &u.ddq.dd.digest.h[0] == a, sha512_bad_layout ); + linker_assert ( &u.ddq.dd.digest.h[1] == b, sha512_bad_layout ); + linker_assert ( &u.ddq.dd.digest.h[2] == c, sha512_bad_layout ); + linker_assert ( &u.ddq.dd.digest.h[3] == d, sha512_bad_layout ); + linker_assert ( &u.ddq.dd.digest.h[4] == e, sha512_bad_layout ); + linker_assert ( &u.ddq.dd.digest.h[5] == f, sha512_bad_layout ); + linker_assert ( &u.ddq.dd.digest.h[6] == g, sha512_bad_layout ); + linker_assert ( &u.ddq.dd.digest.h[7] == h, sha512_bad_layout ); + linker_assert ( &u.ddq.dd.data.qword[0] == w, sha512_bad_layout ); + + 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 ) ); +} + +/** + * Accumulate data with SHA-512 algorithm + * + * @v ctx SHA-512 context + * @v data Data + * @v len Length of data + */ +void sha512_update ( void *ctx, const void *data, size_t len ) { + 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 ); + } +} + +/** + * Generate SHA-512 digest + * + * @v ctx SHA-512 context + * @v out Output buffer + */ +void sha512_final ( void *ctx, void *out ) { + 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 ); +} + +/** SHA-512 algorithm */ +struct digest_algorithm sha512_algorithm = { + .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, +}; + +/** "sha512" object identifier */ +static uint8_t oid_sha512[] = { ASN1_OID_SHA512 }; + +/** "sha512" OID-identified algorithm */ +struct asn1_algorithm oid_sha512_algorithm __asn1_algorithm = { + .name = "sha512", + .digest = &sha512_algorithm, + .oid = ASN1_OID_CURSOR ( oid_sha512 ), +}; |