diff options
Diffstat (limited to 'crypto/hmac/hmac.c')
| -rw-r--r-- | crypto/hmac/hmac.c | 125 |
1 files changed, 98 insertions, 27 deletions
diff --git a/crypto/hmac/hmac.c b/crypto/hmac/hmac.c index 6899be6..ba27cbf 100644 --- a/crypto/hmac/hmac.c +++ b/crypto/hmac/hmac.c @@ -61,14 +61,34 @@ #include "cryptlib.h" #include <openssl/hmac.h> -#ifndef OPENSSL_FIPS +#ifdef OPENSSL_FIPS +#include <openssl/fips.h> +#endif -void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, +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]; +#ifdef OPENSSL_FIPS + if (FIPS_mode()) + { + /* If we have an ENGINE need to allow non FIPS */ + if ((impl || ctx->i_ctx.engine) + && !(ctx->i_ctx.flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)) + { + EVPerr(EVP_F_HMAC_INIT_EX, EVP_R_DISABLED_FOR_FIPS); + return 0; + } + /* Other algorithm blocking will be done in FIPS_cmac_init, + * via FIPS_hmac_init_ex(). + */ + if (!impl && !ctx->i_ctx.engine) + return FIPS_hmac_init_ex(ctx, key, len, md, NULL); + } +#endif + if (md != NULL) { reset=1; @@ -84,10 +104,13 @@ void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, OPENSSL_assert(j <= (int)sizeof(ctx->key)); if (j < len) { - EVP_DigestInit_ex(&ctx->md_ctx,md, impl); - EVP_DigestUpdate(&ctx->md_ctx,key,len); - EVP_DigestFinal_ex(&(ctx->md_ctx),ctx->key, - &ctx->key_length); + 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 { @@ -104,39 +127,61 @@ void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, { for (i=0; i<HMAC_MAX_MD_CBLOCK; i++) pad[i]=0x36^ctx->key[i]; - EVP_DigestInit_ex(&ctx->i_ctx,md, impl); - EVP_DigestUpdate(&ctx->i_ctx,pad,EVP_MD_block_size(md)); + if (!EVP_DigestInit_ex(&ctx->i_ctx,md, impl)) + goto err; + if (!EVP_DigestUpdate(&ctx->i_ctx,pad,EVP_MD_block_size(md))) + goto err; for (i=0; i<HMAC_MAX_MD_CBLOCK; i++) pad[i]=0x5c^ctx->key[i]; - EVP_DigestInit_ex(&ctx->o_ctx,md, impl); - EVP_DigestUpdate(&ctx->o_ctx,pad,EVP_MD_block_size(md)); + if (!EVP_DigestInit_ex(&ctx->o_ctx,md, impl)) + goto err; + if (!EVP_DigestUpdate(&ctx->o_ctx,pad,EVP_MD_block_size(md))) + goto err; } - EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->i_ctx); + if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->i_ctx)) + goto err; + return 1; + err: + return 0; } -void HMAC_Init(HMAC_CTX *ctx, const void *key, int len, - const EVP_MD *md) +int HMAC_Init(HMAC_CTX *ctx, const void *key, int len, const EVP_MD *md) { if(key && md) HMAC_CTX_init(ctx); - HMAC_Init_ex(ctx,key,len,md, NULL); + return HMAC_Init_ex(ctx,key,len,md, NULL); } -void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len) +int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len) { - EVP_DigestUpdate(&ctx->md_ctx,data,len); +#ifdef OPENSSL_FIPS + if (FIPS_mode() && !ctx->i_ctx.engine) + return FIPS_hmac_update(ctx, data, len); +#endif + return EVP_DigestUpdate(&ctx->md_ctx,data,len); } -void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len) +int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len) { unsigned int i; unsigned char buf[EVP_MAX_MD_SIZE]; +#ifdef OPENSSL_FIPS + if (FIPS_mode() && !ctx->i_ctx.engine) + return FIPS_hmac_final(ctx, md, len); +#endif - EVP_DigestFinal_ex(&ctx->md_ctx,buf,&i); - EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->o_ctx); - EVP_DigestUpdate(&ctx->md_ctx,buf,i); - EVP_DigestFinal_ex(&ctx->md_ctx,md,len); + 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) @@ -146,8 +191,31 @@ void HMAC_CTX_init(HMAC_CTX *ctx) EVP_MD_CTX_init(&ctx->md_ctx); } +int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx) + { + if (!EVP_MD_CTX_copy(&dctx->i_ctx, &sctx->i_ctx)) + goto err; + if (!EVP_MD_CTX_copy(&dctx->o_ctx, &sctx->o_ctx)) + goto err; + if (!EVP_MD_CTX_copy(&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) { +#ifdef OPENSSL_FIPS + if (FIPS_mode() && !ctx->i_ctx.engine) + { + FIPS_hmac_ctx_cleanup(ctx); + return; + } +#endif EVP_MD_CTX_cleanup(&ctx->i_ctx); EVP_MD_CTX_cleanup(&ctx->o_ctx); EVP_MD_CTX_cleanup(&ctx->md_ctx); @@ -163,11 +231,16 @@ unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len, if (md == NULL) md=m; HMAC_CTX_init(&c); - HMAC_Init(&c,key,key_len,evp_md); - HMAC_Update(&c,d,n); - HMAC_Final(&c,md,md_len); + 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); + return md; + err: + return NULL; } void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags) @@ -176,5 +249,3 @@ void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags) EVP_MD_CTX_set_flags(&ctx->o_ctx, flags); EVP_MD_CTX_set_flags(&ctx->md_ctx, flags); } - -#endif |
