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AI fixes

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bol-van
2026-02-05 12:54:59 +03:00
parent 20a0fa671d
commit 3334786fe3
1 changed files with 14 additions and 5 deletions
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19
nfq2/crypto/gcm.c
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@@ -258,6 +258,8 @@ int gcm_start(gcm_context *ctx, // pointer to user-provided GCM context
size_t use_len; // byte count to process, up to 16 bytes size_t use_len; // byte count to process, up to 16 bytes
size_t i; // local loop iterator size_t i; // local loop iterator
if (iv_len!=12) return -1;
// since the context might be reused under the same key // since the context might be reused under the same key
// we zero the working buffers for this next new process // we zero the working buffers for this next new process
memset(ctx->y, 0x00, sizeof(ctx->y)); memset(ctx->y, 0x00, sizeof(ctx->y));
@@ -391,7 +393,9 @@ int gcm_finish(gcm_context *ctx, // pointer to user-provided GCM context
uint64_t orig_add_len = ctx->add_len * 8; uint64_t orig_add_len = ctx->add_len * 8;
size_t i; size_t i;
if (tag_len != 0) memcpy(tag, ctx->base_ectr, tag_len); if (tag_len>16) return -1;
if (tag_len) memcpy(tag, ctx->base_ectr, tag_len);
if (orig_len || orig_add_len) { if (orig_len || orig_add_len) {
memset(work_buf, 0x00, 16); memset(work_buf, 0x00, 16);
@@ -443,10 +447,12 @@ int gcm_crypt_and_tag(
prepare the gcm context with the keying material, we simply prepare the gcm context with the keying material, we simply
invoke each of the three GCM sub-functions in turn... invoke each of the three GCM sub-functions in turn...
*/ */
gcm_start(ctx, mode, iv, iv_len, add, add_len); if (iv_len!=12 || tag_len>16) return -1;
gcm_update(ctx, length, input, output);
gcm_finish(ctx, tag, tag_len); int ret;
return(0); if ((ret=gcm_start(ctx, mode, iv, iv_len, add, add_len))) return ret;
if ((ret=gcm_update(ctx, length, input, output))) return ret;
return gcm_finish(ctx, tag, tag_len);
} }
@@ -477,6 +483,9 @@ int gcm_auth_decrypt(
uchar check_tag[16]; // the tag generated and returned by decryption uchar check_tag[16]; // the tag generated and returned by decryption
int diff; // an ORed flag to detect authentication errors int diff; // an ORed flag to detect authentication errors
size_t i; // our local iterator size_t i; // our local iterator
if (iv_len!=12 || tag_len>16) return -1;
/* /*
we use GCM_DECRYPT_AND_TAG (above) to perform our decryption we use GCM_DECRYPT_AND_TAG (above) to perform our decryption
(which is an identical XORing to reverse the previous one) (which is an identical XORing to reverse the previous one)