diff options
Diffstat (limited to 'arch/s390/crypto/sha1_s390.c')
| -rw-r--r-- | arch/s390/crypto/sha1_s390.c | 83 |
1 files changed, 37 insertions, 46 deletions
diff --git a/arch/s390/crypto/sha1_s390.c b/arch/s390/crypto/sha1_s390.c index 49ca8690ee3..969639f3197 100644 --- a/arch/s390/crypto/sha1_s390.c +++ b/arch/s390/crypto/sha1_s390.c @@ -8,8 +8,9 @@ * implementation written by Steve Reid. * * s390 Version: - * Copyright (C) 2003 IBM Deutschland GmbH, IBM Corporation - * Author(s): Thomas Spatzier (tspat@de.ibm.com) + * Copyright IBM Corp. 2003,2007 + * Author(s): Thomas Spatzier + * Jan Glauber (jan.glauber@de.ibm.com) * * Derived from "crypto/sha1.c" * Copyright (c) Alan Smithee. @@ -43,16 +44,14 @@ struct crypt_s390_sha1_ctx { static void sha1_init(struct crypto_tfm *tfm) { struct crypt_s390_sha1_ctx *ctx = crypto_tfm_ctx(tfm); - static const u32 initstate[5] = { - 0x67452301, - 0xEFCDAB89, - 0x98BADCFE, - 0x10325476, - 0xC3D2E1F0 - }; + + ctx->state[0] = 0x67452301; + ctx->state[1] = 0xEFCDAB89; + ctx->state[2] = 0x98BADCFE; + ctx->state[3] = 0x10325476; + ctx->state[4] = 0xC3D2E1F0; ctx->count = 0; - memcpy(ctx->state, &initstate, sizeof(initstate)); ctx->buf_len = 0; } @@ -63,13 +62,13 @@ static void sha1_update(struct crypto_tfm *tfm, const u8 *data, long imd_len; sctx = crypto_tfm_ctx(tfm); - sctx->count += len * 8; //message bit length + sctx->count += len * 8; /* message bit length */ - //anything in buffer yet? -> must be completed + /* anything in buffer yet? -> must be completed */ if (sctx->buf_len && (sctx->buf_len + len) >= SHA1_BLOCK_SIZE) { - //complete full block and hash + /* complete full block and hash */ memcpy(sctx->buffer + sctx->buf_len, data, - SHA1_BLOCK_SIZE - sctx->buf_len); + SHA1_BLOCK_SIZE - sctx->buf_len); crypt_s390_kimd(KIMD_SHA_1, sctx->state, sctx->buffer, SHA1_BLOCK_SIZE); data += SHA1_BLOCK_SIZE - sctx->buf_len; @@ -77,37 +76,36 @@ static void sha1_update(struct crypto_tfm *tfm, const u8 *data, sctx->buf_len = 0; } - //rest of data contains full blocks? + /* rest of data contains full blocks? */ imd_len = len & ~0x3ful; - if (imd_len){ + if (imd_len) { crypt_s390_kimd(KIMD_SHA_1, sctx->state, data, imd_len); data += imd_len; len -= imd_len; } - //anything left? store in buffer - if (len){ + /* anything left? store in buffer */ + if (len) { memcpy(sctx->buffer + sctx->buf_len , data, len); sctx->buf_len += len; } } -static void -pad_message(struct crypt_s390_sha1_ctx* sctx) +static void pad_message(struct crypt_s390_sha1_ctx* sctx) { int index; index = sctx->buf_len; - sctx->buf_len = (sctx->buf_len < 56)? - SHA1_BLOCK_SIZE:2 * SHA1_BLOCK_SIZE; - //start pad with 1 + sctx->buf_len = (sctx->buf_len < 56) ? + SHA1_BLOCK_SIZE:2 * SHA1_BLOCK_SIZE; + /* start pad with 1 */ sctx->buffer[index] = 0x80; - //pad with zeros + /* pad with zeros */ index++; memset(sctx->buffer + index, 0x00, sctx->buf_len - index); - //append length + /* append length */ memcpy(sctx->buffer + sctx->buf_len - 8, &sctx->count, - sizeof sctx->count); + sizeof sctx->count); } /* Add padding and return the message digest. */ @@ -115,47 +113,40 @@ static void sha1_final(struct crypto_tfm *tfm, u8 *out) { struct crypt_s390_sha1_ctx *sctx = crypto_tfm_ctx(tfm); - //must perform manual padding + /* must perform manual padding */ pad_message(sctx); crypt_s390_kimd(KIMD_SHA_1, sctx->state, sctx->buffer, sctx->buf_len); - //copy digest to out + /* copy digest to out */ memcpy(out, sctx->state, SHA1_DIGEST_SIZE); - /* Wipe context */ + /* wipe context */ memset(sctx, 0, sizeof *sctx); } static struct crypto_alg alg = { .cra_name = "sha1", - .cra_driver_name = "sha1-s390", + .cra_driver_name= "sha1-s390", .cra_priority = CRYPT_S390_PRIORITY, .cra_flags = CRYPTO_ALG_TYPE_DIGEST, .cra_blocksize = SHA1_BLOCK_SIZE, .cra_ctxsize = sizeof(struct crypt_s390_sha1_ctx), .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(alg.cra_list), + .cra_list = LIST_HEAD_INIT(alg.cra_list), .cra_u = { .digest = { .dia_digestsize = SHA1_DIGEST_SIZE, - .dia_init = sha1_init, - .dia_update = sha1_update, - .dia_final = sha1_final } } + .dia_init = sha1_init, + .dia_update = sha1_update, + .dia_final = sha1_final } } }; -static int -init(void) +static int __init init(void) { - int ret = -ENOSYS; + if (!crypt_s390_func_available(KIMD_SHA_1)) + return -EOPNOTSUPP; - if (crypt_s390_func_available(KIMD_SHA_1)){ - ret = crypto_register_alg(&alg); - if (ret == 0){ - printk(KERN_INFO "crypt_s390: sha1_s390 loaded.\n"); - } - } - return ret; + return crypto_register_alg(&alg); } -static void __exit -fini(void) +static void __exit fini(void) { crypto_unregister_alg(&alg); } |