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authorHolger Dengler <dengler@linux.ibm.com>2023-09-27 15:40:47 +0200
committerTomas Mraz <tomas@openssl.org>2023-11-10 15:31:29 +0100
commit94898923538f686b74b6ddef34571f804d9b3811 (patch)
treea40efdb9cfffea135246bdcc1e64781908be3fa3
parent1022131d16e30cfbf896e02419019de48e8e1149 (diff)
Support EVP_DigestSqueeze() for in the digest provider for s390x.
The new EVP_DigestSqueeze() API requires changes to all keccak-based digest provider implementations. Update the s390x-part of the SHA3 digest provider. Squeeze for SHA3 is not supported, so add an empty function pointer (NULL). Signed-off-by: Holger Dengler <dengler@linux.ibm.com> Reviewed-by: Shane Lontis <shane.lontis@oracle.com> Reviewed-by: Todd Short <todd.short@me.com> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/22221)
-rw-r--r--providers/implementations/digests/sha3_prov.c103
1 files changed, 100 insertions, 3 deletions
diff --git a/providers/implementations/digests/sha3_prov.c b/providers/implementations/digests/sha3_prov.c
index f691273baf..2fd0f928e7 100644
--- a/providers/implementations/digests/sha3_prov.c
+++ b/providers/implementations/digests/sha3_prov.c
@@ -225,6 +225,45 @@ static int s390x_shake_final(void *vctx, unsigned char *out, size_t outlen)
return 1;
}
+static int s390x_shake_squeeze(void *vctx, unsigned char *out, size_t outlen)
+{
+ KECCAK1600_CTX *ctx = vctx;
+ size_t len;
+
+ if (!ossl_prov_is_running())
+ return 0;
+ if (ctx->xof_state == XOF_STATE_FINAL)
+ return 0;
+ /*
+ * On the first squeeze call, finish the absorb process (incl. padding).
+ */
+ if (ctx->xof_state != XOF_STATE_SQUEEZE) {
+ ctx->xof_state = XOF_STATE_SQUEEZE;
+ s390x_klmd(ctx->buf, ctx->bufsz, out, outlen, ctx->pad, ctx->A);
+ ctx->bufsz = outlen % ctx->block_size;
+ /* reuse ctx->bufsz to count bytes squeezed from current sponge */
+ return 1;
+ }
+ ctx->xof_state = XOF_STATE_SQUEEZE;
+ if (ctx->bufsz != 0) {
+ len = ctx->block_size - ctx->bufsz;
+ if (outlen < len)
+ len = outlen;
+ memcpy(out, (char *)ctx->A + ctx->bufsz, len);
+ out += len;
+ outlen -= len;
+ ctx->bufsz += len;
+ if (ctx->bufsz == ctx->block_size)
+ ctx->bufsz = 0;
+ }
+ if (outlen == 0)
+ return 1;
+ s390x_klmd(NULL, 0, out, outlen, ctx->pad | S390X_KLMD_PS, ctx->A);
+ ctx->bufsz = outlen % ctx->block_size;
+
+ return 1;
+}
+
static int s390x_keccakc_final(void *vctx, unsigned char *out, size_t outlen,
int padding)
{
@@ -264,28 +303,86 @@ static int s390x_kmac_final(void *vctx, unsigned char *out, size_t outlen)
return s390x_keccakc_final(vctx, out, outlen, 0x04);
}
+static int s390x_keccakc_squeeze(void *vctx, unsigned char *out, size_t outlen,
+ int padding)
+{
+ KECCAK1600_CTX *ctx = vctx;
+ size_t len;
+
+ if (!ossl_prov_is_running())
+ return 0;
+ if (ctx->xof_state == XOF_STATE_FINAL)
+ return 0;
+ /*
+ * On the first squeeze call, finish the absorb process
+ * by adding the trailing padding and then doing
+ * a final absorb.
+ */
+ if (ctx->xof_state != XOF_STATE_SQUEEZE) {
+ len = ctx->block_size - ctx->bufsz;
+ memset(ctx->buf + ctx->bufsz, 0, len);
+ ctx->buf[ctx->bufsz] = padding;
+ ctx->buf[ctx->block_size - 1] |= 0x80;
+ s390x_kimd(ctx->buf, ctx->block_size, ctx->pad, ctx->A);
+ ctx->bufsz = 0;
+ /* reuse ctx->bufsz to count bytes squeezed from current sponge */
+ }
+ if (ctx->bufsz != 0 || ctx->xof_state != XOF_STATE_SQUEEZE) {
+ len = ctx->block_size - ctx->bufsz;
+ if (outlen < len)
+ len = outlen;
+ memcpy(out, (char *)ctx->A + ctx->bufsz, len);
+ out += len;
+ outlen -= len;
+ ctx->bufsz += len;
+ if (ctx->bufsz == ctx->block_size)
+ ctx->bufsz = 0;
+ }
+ ctx->xof_state = XOF_STATE_SQUEEZE;
+ if (outlen == 0)
+ return 1;
+ s390x_klmd(NULL, 0, out, outlen, ctx->pad | S390X_KLMD_PS, ctx->A);
+ ctx->bufsz = outlen % ctx->block_size;
+
+ return 1;
+}
+
+static int s390x_keccak_squeeze(void *vctx, unsigned char *out, size_t outlen)
+{
+ return s390x_keccakc_squeeze(vctx, out, outlen, 0x01);
+}
+
+static int s390x_kmac_squeeze(void *vctx, unsigned char *out, size_t outlen)
+{
+ return s390x_keccakc_squeeze(vctx, out, outlen, 0x04);
+}
+
static PROV_SHA3_METHOD sha3_s390x_md =
{
s390x_sha3_absorb,
- s390x_sha3_final
+ s390x_sha3_final,
+ NULL,
};
static PROV_SHA3_METHOD keccak_s390x_md =
{
s390x_sha3_absorb,
s390x_keccak_final,
+ s390x_keccak_squeeze,
};
static PROV_SHA3_METHOD shake_s390x_md =
{
s390x_sha3_absorb,
- s390x_shake_final
+ s390x_shake_final,
+ s390x_shake_squeeze,
};
static PROV_SHA3_METHOD kmac_s390x_md =
{
s390x_sha3_absorb,
- s390x_kmac_final
+ s390x_kmac_final,
+ s390x_kmac_squeeze,
};
# define SHAKE_SET_MD(uname, typ) \