diff options
Diffstat (limited to 'crypto/hmac/hmac.c')
-rw-r--r-- | crypto/hmac/hmac.c | 278 |
1 files changed, 135 insertions, 143 deletions
diff --git a/crypto/hmac/hmac.c b/crypto/hmac/hmac.c index 7028a9dc29..1d871f0410 100644 --- a/crypto/hmac/hmac.c +++ b/crypto/hmac/hmac.c @@ -5,21 +5,21 @@ * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. - * + * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * + * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. - * + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -34,10 +34,10 @@ * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from + * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * + * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE @@ -49,15 +49,13 @@ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. - * + * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ - - #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -65,154 +63,148 @@ #include <openssl/hmac.h> int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, - const EVP_MD *md, ENGINE *impl) - { - int i,j,reset=0; - unsigned char pad[HMAC_MAX_MD_CBLOCK]; - - if (md != NULL) - { - reset=1; - ctx->md=md; - } - else - md=ctx->md; - - if (key != NULL) - { - reset=1; - j=M_EVP_MD_block_size(md); - OPENSSL_assert(j <= (int)sizeof(ctx->key)); - if (j < len) - { - if (!EVP_DigestInit_ex(&ctx->md_ctx,md, impl)) - goto err; - if (!EVP_DigestUpdate(&ctx->md_ctx,key,len)) - goto err; - if (!EVP_DigestFinal_ex(&(ctx->md_ctx),ctx->key, - &ctx->key_length)) - goto err; - } - else - { - OPENSSL_assert(len>=0 && len<=(int)sizeof(ctx->key)); - memcpy(ctx->key,key,len); - ctx->key_length=len; - } - if(ctx->key_length != HMAC_MAX_MD_CBLOCK) - memset(&ctx->key[ctx->key_length], 0, - HMAC_MAX_MD_CBLOCK - ctx->key_length); - } - - if (reset) - { - for (i=0; i<HMAC_MAX_MD_CBLOCK; i++) - pad[i]=0x36^ctx->key[i]; - if (!EVP_DigestInit_ex(&ctx->i_ctx,md, impl)) - goto err; - if (!EVP_DigestUpdate(&ctx->i_ctx,pad,M_EVP_MD_block_size(md))) - goto err; - - for (i=0; i<HMAC_MAX_MD_CBLOCK; i++) - pad[i]=0x5c^ctx->key[i]; - if (!EVP_DigestInit_ex(&ctx->o_ctx,md, impl)) - goto err; - if (!EVP_DigestUpdate(&ctx->o_ctx,pad,M_EVP_MD_block_size(md))) - goto err; - } - if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->i_ctx)) - goto err; - return 1; - err: - return 0; - } + const EVP_MD *md, ENGINE *impl) +{ + int i, j, reset = 0; + unsigned char pad[HMAC_MAX_MD_CBLOCK]; + + if (md != NULL) { + reset = 1; + ctx->md = md; + } else + md = ctx->md; + + if (key != NULL) { + reset = 1; + j = M_EVP_MD_block_size(md); + OPENSSL_assert(j <= (int)sizeof(ctx->key)); + if (j < len) { + if (!EVP_DigestInit_ex(&ctx->md_ctx, md, impl)) + goto err; + if (!EVP_DigestUpdate(&ctx->md_ctx, key, len)) + goto err; + if (!EVP_DigestFinal_ex(&(ctx->md_ctx), ctx->key, + &ctx->key_length)) + goto err; + } else { + OPENSSL_assert(len >= 0 && len <= (int)sizeof(ctx->key)); + memcpy(ctx->key, key, len); + ctx->key_length = len; + } + if (ctx->key_length != HMAC_MAX_MD_CBLOCK) + memset(&ctx->key[ctx->key_length], 0, + HMAC_MAX_MD_CBLOCK - ctx->key_length); + } + + if (reset) { + for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++) + pad[i] = 0x36 ^ ctx->key[i]; + if (!EVP_DigestInit_ex(&ctx->i_ctx, md, impl)) + goto err; + if (!EVP_DigestUpdate(&ctx->i_ctx, pad, M_EVP_MD_block_size(md))) + goto err; + + for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++) + pad[i] = 0x5c ^ ctx->key[i]; + if (!EVP_DigestInit_ex(&ctx->o_ctx, md, impl)) + goto err; + if (!EVP_DigestUpdate(&ctx->o_ctx, pad, M_EVP_MD_block_size(md))) + goto err; + } + if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx, &ctx->i_ctx)) + goto err; + return 1; + err: + return 0; +} int HMAC_Init(HMAC_CTX *ctx, const void *key, int len, const EVP_MD *md) - { - if(key && md) - HMAC_CTX_init(ctx); - return HMAC_Init_ex(ctx,key,len,md, NULL); - } +{ + if (key && md) + HMAC_CTX_init(ctx); + return HMAC_Init_ex(ctx, key, len, md, NULL); +} int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len) - { - return EVP_DigestUpdate(&ctx->md_ctx,data,len); - } +{ + return EVP_DigestUpdate(&ctx->md_ctx, data, len); +} int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len) - { - unsigned int i; - unsigned char buf[EVP_MAX_MD_SIZE]; - - if (!EVP_DigestFinal_ex(&ctx->md_ctx,buf,&i)) - goto err; - if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->o_ctx)) - goto err; - if (!EVP_DigestUpdate(&ctx->md_ctx,buf,i)) - goto err; - if (!EVP_DigestFinal_ex(&ctx->md_ctx,md,len)) - goto err; - return 1; - err: - return 0; - } +{ + unsigned int i; + unsigned char buf[EVP_MAX_MD_SIZE]; + + if (!EVP_DigestFinal_ex(&ctx->md_ctx, buf, &i)) + goto err; + if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx, &ctx->o_ctx)) + goto err; + if (!EVP_DigestUpdate(&ctx->md_ctx, buf, i)) + goto err; + if (!EVP_DigestFinal_ex(&ctx->md_ctx, md, len)) + goto err; + return 1; + err: + return 0; +} void HMAC_CTX_init(HMAC_CTX *ctx) - { - EVP_MD_CTX_init(&ctx->i_ctx); - EVP_MD_CTX_init(&ctx->o_ctx); - EVP_MD_CTX_init(&ctx->md_ctx); - } +{ + EVP_MD_CTX_init(&ctx->i_ctx); + EVP_MD_CTX_init(&ctx->o_ctx); + EVP_MD_CTX_init(&ctx->md_ctx); +} int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx) - { - HMAC_CTX_init(dctx); - if (!EVP_MD_CTX_copy_ex(&dctx->i_ctx, &sctx->i_ctx)) - goto err; - if (!EVP_MD_CTX_copy_ex(&dctx->o_ctx, &sctx->o_ctx)) - goto err; - if (!EVP_MD_CTX_copy_ex(&dctx->md_ctx, &sctx->md_ctx)) - goto err; - memcpy(dctx->key, sctx->key, HMAC_MAX_MD_CBLOCK); - dctx->key_length = sctx->key_length; - dctx->md = sctx->md; - return 1; - err: - return 0; - } +{ + HMAC_CTX_init(dctx); + if (!EVP_MD_CTX_copy_ex(&dctx->i_ctx, &sctx->i_ctx)) + goto err; + if (!EVP_MD_CTX_copy_ex(&dctx->o_ctx, &sctx->o_ctx)) + goto err; + if (!EVP_MD_CTX_copy_ex(&dctx->md_ctx, &sctx->md_ctx)) + goto err; + memcpy(dctx->key, sctx->key, HMAC_MAX_MD_CBLOCK); + dctx->key_length = sctx->key_length; + dctx->md = sctx->md; + return 1; + err: + return 0; +} void HMAC_CTX_cleanup(HMAC_CTX *ctx) - { - EVP_MD_CTX_cleanup(&ctx->i_ctx); - EVP_MD_CTX_cleanup(&ctx->o_ctx); - EVP_MD_CTX_cleanup(&ctx->md_ctx); - memset(ctx,0,sizeof *ctx); - } +{ + EVP_MD_CTX_cleanup(&ctx->i_ctx); + EVP_MD_CTX_cleanup(&ctx->o_ctx); + EVP_MD_CTX_cleanup(&ctx->md_ctx); + memset(ctx, 0, sizeof *ctx); +} unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len, - const unsigned char *d, size_t n, unsigned char *md, - unsigned int *md_len) - { - HMAC_CTX c; - static unsigned char m[EVP_MAX_MD_SIZE]; - - if (md == NULL) md=m; - HMAC_CTX_init(&c); - if (!HMAC_Init(&c,key,key_len,evp_md)) - goto err; - if (!HMAC_Update(&c,d,n)) - goto err; - if (!HMAC_Final(&c,md,md_len)) - goto err; - HMAC_CTX_cleanup(&c); - return md; - err: - return NULL; - } + const unsigned char *d, size_t n, unsigned char *md, + unsigned int *md_len) +{ + HMAC_CTX c; + static unsigned char m[EVP_MAX_MD_SIZE]; + + if (md == NULL) + md = m; + HMAC_CTX_init(&c); + if (!HMAC_Init(&c, key, key_len, evp_md)) + goto err; + if (!HMAC_Update(&c, d, n)) + goto err; + if (!HMAC_Final(&c, md, md_len)) + goto err; + HMAC_CTX_cleanup(&c); + return md; + err: + return NULL; +} void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags) - { - M_EVP_MD_CTX_set_flags(&ctx->i_ctx, flags); - M_EVP_MD_CTX_set_flags(&ctx->o_ctx, flags); - M_EVP_MD_CTX_set_flags(&ctx->md_ctx, flags); - } +{ + M_EVP_MD_CTX_set_flags(&ctx->i_ctx, flags); + M_EVP_MD_CTX_set_flags(&ctx->o_ctx, flags); + M_EVP_MD_CTX_set_flags(&ctx->md_ctx, flags); +} |