Use exact match for PSS digest

JeremiahM37 · JeremiahM37 · commit 9542ad5bf652 · 2026-04-06T14:40:31.000Z
diff --git a/src/wp_rsa_sig.c b/src/wp_rsa_sig.c
@@ -130,7 +130,7 @@ static int wp_rsa_setup_md(wp_RsaSigCtx* ctx, const char* mdName,
     if (ctx->padMode == RSA_PKCS1_PSS_PADDING && ctx->minSaltLen != -1) {
         wp_rsa_get_pss_mds(ctx->rsa, &localMdName, NULL);
         if (mdName != NULL &&
-            XSTRNCASECMP(localMdName, mdName, XSTRLEN(localMdName)) != 0) {
+            XSTRCASECMP(localMdName, mdName) != 0) {
             ok = 0;
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -130,7 +130,7 @@ static int wp_rsa_setup_md(wp_RsaSigCtx* ctx, const char* mdName,`
`130`	`130`	`if (ctx->padMode == RSA_PKCS1_PSS_PADDING && ctx->minSaltLen != -1) {`
`131`	`131`	`wp_rsa_get_pss_mds(ctx->rsa, &localMdName, NULL);`
`132`	`132`	`if (mdName != NULL &&`
`133`		`- XSTRNCASECMP(localMdName, mdName, XSTRLEN(localMdName)) != 0) {`
	`133`	`+ XSTRCASECMP(localMdName, mdName) != 0) {`
`134`	`134`	`ok = 0;`
`135`	`135`	`}`
`136`	`136`	`}`