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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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6
src/openssl.c
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@@ -577,10 +577,11 @@ libssh2_sha1(const unsigned char *message, unsigned long len,
EVP_MD_CTX ctx; EVP_MD_CTX ctx;
EVP_MD_CTX_init(&ctx); EVP_MD_CTX_init(&ctx);
EVP_DigestInit(&ctx, EVP_get_digestbyname("sha1")); if (EVP_DigestInit(&ctx, EVP_get_digestbyname("sha1"))) {
EVP_DigestUpdate(&ctx, message, len); EVP_DigestUpdate(&ctx, message, len);
EVP_DigestFinal(&ctx, out, NULL); EVP_DigestFinal(&ctx, out, NULL);
} }
}
int int
libssh2_md5_init(libssh2_md5_ctx *ctx) libssh2_md5_init(libssh2_md5_ctx *ctx)
@@ -596,10 +597,11 @@ libssh2_md5(const unsigned char *message, unsigned long len,
EVP_MD_CTX ctx; EVP_MD_CTX ctx;
EVP_MD_CTX_init(&ctx); EVP_MD_CTX_init(&ctx);
EVP_DigestInit(&ctx, EVP_get_digestbyname("md5")); if (EVP_DigestInit(&ctx, EVP_get_digestbyname("md5"))) {
EVP_DigestUpdate(&ctx, message, len); EVP_DigestUpdate(&ctx, message, len);
EVP_DigestFinal(&ctx, out, NULL); EVP_DigestFinal(&ctx, out, NULL);
} }
}
static unsigned char * static unsigned char *
write_bn(unsigned char *buf, const BIGNUM *bn, int bn_bytes) write_bn(unsigned char *buf, const BIGNUM *bn, int bn_bytes)