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openssl.c: fix possible segfault in case EVP_DigestInit fails

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This commit is contained in:
Marc Hoersken 2015-03-23 22:07:39 +01:00
parent 864950cf16
commit 84590bc78f
1 changed files with 8 additions and 6 deletions
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14
src/openssl.c
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@ -577,9 +577,10 @@ libssh2_sha1(const unsigned char *message, unsigned long len,
EVP_MD_CTX ctx;
EVP_MD_CTX_init(&ctx);
EVP_DigestInit(&ctx, EVP_get_digestbyname("sha1"));
EVP_DigestUpdate(&ctx, message, len);
EVP_DigestFinal(&ctx, out, NULL);
if (EVP_DigestInit(&ctx, EVP_get_digestbyname("sha1"))) {
EVP_DigestUpdate(&ctx, message, len);
EVP_DigestFinal(&ctx, out, NULL);
}
}
int
@ -596,9 +597,10 @@ libssh2_md5(const unsigned char *message, unsigned long len,
EVP_MD_CTX ctx;
EVP_MD_CTX_init(&ctx);
EVP_DigestInit(&ctx, EVP_get_digestbyname("md5"));
EVP_DigestUpdate(&ctx, message, len);
EVP_DigestFinal(&ctx, out, NULL);
if (EVP_DigestInit(&ctx, EVP_get_digestbyname("md5"))) {
EVP_DigestUpdate(&ctx, message, len);
EVP_DigestFinal(&ctx, out, NULL);
}
}
static unsigned char *