Our asprintf and vasprintf have different prototypes than the glibc functions. This causes trouble when we want to share barebox code with userspace code. Change the prototypes for (v)asprintf to match the glibc prototypes. Since the current (v)asprintf are convenient to use change the existing functions to b(v)asprintf. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
200 lines
4.2 KiB
C
200 lines
4.2 KiB
C
/*
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* (C) Copyright 2015 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* GPL v2 only
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*/
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#include <common.h>
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#include <digest.h>
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#include <malloc.h>
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#include <init.h>
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#include <crypto/internal.h>
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struct digest_hmac {
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char *name;
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unsigned int pad_length;
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struct digest_algo algo;
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};
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struct digest_hmac_ctx {
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struct digest *d;
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unsigned char *ipad;
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unsigned char *opad;
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unsigned char *key;
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unsigned int keylen;
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};
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static inline struct digest_hmac *to_digest_hmac(struct digest_algo *algo)
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{
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return container_of(algo, struct digest_hmac, algo);
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}
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static int digest_hmac_alloc(struct digest *d)
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{
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struct digest_hmac_ctx *dh = d->ctx;
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struct digest_hmac *hmac = to_digest_hmac(d->algo);
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dh->d = digest_alloc(hmac->name);
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if (!dh->d)
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return -EINVAL;
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d->length = dh->d->algo->length;
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dh->ipad = xmalloc(hmac->pad_length);
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dh->opad = xmalloc(hmac->pad_length);
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return 0;
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}
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static void digest_hmac_free(struct digest *d)
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{
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struct digest_hmac_ctx *dh = d->ctx;
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free(dh->ipad);
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free(dh->opad);
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free(dh->key);
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digest_free(dh->d);
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}
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static int digest_hmac_set_key(struct digest *d, const unsigned char *key,
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unsigned int len)
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{
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struct digest_hmac_ctx *dh = d->ctx;
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struct digest_hmac *hmac = to_digest_hmac(d->algo);
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unsigned char *sum = NULL;
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int ret;
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free(dh->key);
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if (len > hmac->pad_length) {
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sum = xmalloc(digest_length(dh->d));
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ret = digest_digest(dh->d, dh->key, dh->keylen, sum);
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if (ret)
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goto err;
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dh->keylen = digest_length(dh->d);
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dh->key = sum;
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} else {
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dh->key = xmalloc(len);
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memcpy(dh->key, key, len);
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dh->keylen = len;
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}
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ret = 0;
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err:
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free(sum);
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return ret;
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}
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static int digest_hmac_init(struct digest *d)
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{
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struct digest_hmac_ctx *dh = d->ctx;
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struct digest_hmac *hmac = to_digest_hmac(d->algo);
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int i, ret;
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unsigned char *key = dh->key;
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unsigned int keylen = dh->keylen;
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memset(dh->ipad, 0x36, hmac->pad_length);
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memset(dh->opad, 0x5C, hmac->pad_length);
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for (i = 0; i < keylen; i++) {
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dh->ipad[i] = (unsigned char)(dh->ipad[i] ^ key[i]);
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dh->opad[i] = (unsigned char)(dh->opad[i] ^ key[i]);
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}
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ret = digest_init(dh->d);
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if (ret)
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return ret;
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return digest_update(dh->d, dh->ipad, hmac->pad_length);
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}
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static int digest_hmac_update(struct digest *d, const void *data,
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unsigned long len)
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{
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struct digest_hmac_ctx *dh = d->ctx;
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return digest_update(dh->d, data, len);
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}
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static int digest_hmac_final(struct digest *d, unsigned char *md)
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{
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struct digest_hmac_ctx *dh = d->ctx;
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struct digest_hmac *hmac = to_digest_hmac(d->algo);
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unsigned char *tmp = NULL;
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int ret;
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tmp = xmalloc(digest_length(d));
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ret = digest_final(dh->d, tmp);
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if (ret)
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goto err;
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ret = digest_init(dh->d);
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if (ret)
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goto err;
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ret = digest_update(dh->d, dh->opad, hmac->pad_length);
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if (ret)
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goto err;
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ret = digest_update(dh->d, tmp, digest_length(d));
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if (ret)
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goto err;
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ret = digest_final(dh->d, md);
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err:
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free(tmp);
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return ret;
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}
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struct digest_algo hmac_algo = {
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.base = {
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.priority = 0,
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.flags = DIGEST_ALGO_NEED_KEY,
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},
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.alloc = digest_hmac_alloc,
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.init = digest_hmac_init,
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.update = digest_hmac_update,
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.final = digest_hmac_final,
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.digest = digest_generic_digest,
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.verify = digest_generic_verify,
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.set_key = digest_hmac_set_key,
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.free = digest_hmac_free,
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.ctx_length = sizeof(struct digest_hmac),
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};
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static int digest_hmac_register(char *name, unsigned int pad_length)
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{
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struct digest_hmac *dh;
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if (!name || !pad_length)
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return -EINVAL;
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dh = xzalloc(sizeof(*dh));
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dh->name = xstrdup(name);
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dh->pad_length = pad_length;
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dh->algo = hmac_algo;
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dh->algo.base.name = basprintf("hmac(%s)", name);
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dh->algo.base.driver_name = basprintf("hmac(%s)-generic", name);
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return digest_algo_register(&dh->algo);
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}
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static int digest_hmac_initcall(void)
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{
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if (IS_ENABLED(CONFIG_MD5))
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digest_hmac_register("md5", 64);
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if (IS_ENABLED(CONFIG_SHA1))
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digest_hmac_register("sha1", 64);
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if (IS_ENABLED(CONFIG_SHA224))
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digest_hmac_register("sha224", 64);
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if (IS_ENABLED(CONFIG_SHA256))
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digest_hmac_register("sha256", 64);
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if (IS_ENABLED(CONFIG_SHA384))
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digest_hmac_register("sha384", 128);
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if (IS_ENABLED(CONFIG_SHA512))
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digest_hmac_register("sha512", 128);
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return 0;
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}
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crypto_initcall(digest_hmac_initcall);
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