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header.s=selector2 header.b=M26m2JQ2; arc=pass\n (i=1 spf=pass spfdomain=siemens.com dkim=pass dkdomain=siemens.com dmarc=pass\n fromdomain=siemens.com); spf=pass (google.com: domain of\n christian.storm@siemens.com designates 2a01:111:f403:c200::1 as permitted\n sender) smtp.mailfrom=christian.storm@siemens.com; dmarc=pass (p=REJECT\n sp=REJECT dis=NONE) header.from=siemens.com","X-Original-From":"\"Storm, Christian\" ","Reply-To":"\"Storm, Christian\" ","Precedence":"list","Mailing-list":"list swupdate@googlegroups.com;\n contact swupdate+owners@googlegroups.com","List-ID":"","X-Spam-Checked-In-Group":"swupdate@googlegroups.com","X-Google-Group-Id":"605343134186","List-Post":",\n ","List-Help":",\n ","List-Archive":",\n ","List-Unsubscribe":"\n ,\n "},"content":"From: Felix Moessbauer \n\nThe EVP_DigestFinal_ex function returns 1 on success, 0 on failure.\nHowever, the caller expects < 0 as failure, success otherwise. By that,\nfailures in the HASH_final function are silently ignored.\n\nThis currently cannot be exploited, as the md_len != SHA256_HASH_LENGTH\nin cpio_utils.c catches this (the md_len stays at the initial value of\n0). We fix it by explicitly comparing the result of EVP_DigestFinal_ex\nagainst the expected values.\n\nFixes: d38d5359 (\"Prepare to use multiple crypto engines\")\nSigned-off-by: Felix Moessbauer \n---\ncrypto/swupdate_HASH_openssl.c | 4 +++-\n1 file changed, 3 insertions(+), 1 deletion(-)","diff":"diff --git a/crypto/swupdate_HASH_openssl.c b/crypto/swupdate_HASH_openssl.c\nindex 9820b9c5..32fe8047 100644\n--- a/crypto/swupdate_HASH_openssl.c\n+++ b/crypto/swupdate_HASH_openssl.c\n@@ -87,8 +87,10 @@ static int openssl_HASH_final(void *ctx, unsigned char *md_value,\nif (!dgst)\nreturn -EFAULT;\n\n- return EVP_DigestFinal_ex (dgst->ctx, md_value, md_len);\n+ if (EVP_DigestFinal_ex (dgst->ctx, md_value, md_len) != 1)\n+ return -EIO;\n\n+ return 0;\n}\n\nstatic void openssl_HASH_cleanup(void *ctx)\n","prefixes":["1/2"]}