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@@ -438,6 +438,9 @@ static int digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
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if (count == 0)
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return 1;
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+ if (digest_ctx == NULL)
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+ return 0;
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+
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if (digest_op(digest_ctx, data, count, NULL, COP_FLAG_UPDATE) < 0) {
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SYSerr(SYS_F_IOCTL, errno);
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return 0;
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@@ -451,6 +454,8 @@ static int digest_final(EVP_MD_CTX *ctx, unsigned char *md)
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struct digest_ctx *digest_ctx =
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(struct digest_ctx *)EVP_MD_CTX_md_data(ctx);
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+ if (md == NULL || digest_ctx == NULL)
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+ return 0;
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if (digest_op(digest_ctx, NULL, 0, md, COP_FLAG_FINAL) < 0) {
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SYSerr(SYS_F_IOCTL, errno);
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return 0;
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