diff options
Diffstat (limited to 'openssl/crypto/hmac/hmac.c')
| -rw-r--r-- | openssl/crypto/hmac/hmac.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/openssl/crypto/hmac/hmac.c b/openssl/crypto/hmac/hmac.c index 547781655..33d88be11 100644 --- a/openssl/crypto/hmac/hmac.c +++ b/openssl/crypto/hmac/hmac.c @@ -87,12 +87,18 @@ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, return FIPS_hmac_init_ex(ctx, key, len, md, NULL); } #endif + /* If we are changing MD then we must have a key */ + if (md != NULL && md != ctx->md && (key == NULL || len < 0)) + return 0; if (md != NULL) { reset = 1; ctx->md = md; - } else + } else if (ctx->md) { md = ctx->md; + } else { + return 0; + } if (key != NULL) { reset = 1; @@ -107,7 +113,8 @@ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, &ctx->key_length)) goto err; } else { - OPENSSL_assert(len >= 0 && len <= (int)sizeof(ctx->key)); + if (len < 0 || len > (int)sizeof(ctx->key)) + return 0; memcpy(ctx->key, key, len); ctx->key_length = len; } @@ -151,6 +158,9 @@ int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len) if (FIPS_mode() && !ctx->i_ctx.engine) return FIPS_hmac_update(ctx, data, len); #endif + if (!ctx->md) + return 0; + return EVP_DigestUpdate(&ctx->md_ctx, data, len); } @@ -163,6 +173,9 @@ int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len) return FIPS_hmac_final(ctx, md, len); #endif + if (!ctx->md) + goto err; + if (!EVP_DigestFinal_ex(&ctx->md_ctx, buf, &i)) goto err; if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx, &ctx->o_ctx)) @@ -181,6 +194,7 @@ 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); + ctx->md = NULL; } int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx) @@ -232,6 +246,7 @@ unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len, HMAC_CTX_cleanup(&c); return md; err: + HMAC_CTX_cleanup(&c); return NULL; } |